CN115981035B

CN115981035B - Display panel with switchable wide and narrow viewing angles, driving method, and display device

Info

Publication number: CN115981035B
Application number: CN202211708460.0A
Authority: CN
Inventors: 钟德镇; 姜丽梅; 刘显贺; 沈家军
Original assignee: InfoVision Optoelectronics Kunshan Co Ltd
Current assignee: InfoVision Optoelectronics Kunshan Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2025-07-01
Anticipated expiration: 2042-12-28
Also published as: CN115981035A

Abstract

A display panel with switchable wide and narrow viewing angles, a driving method, and a display device, the display panel comprising a dimming box and a display box, the upper and lower sides of the dimming box are respectively provided with a first polarizer and a semi-transparent and semi-reflective film, the first polarizer is parallel to the light transmission axis of the semi-transparent and semi-reflective film; the display panel has an identification pattern area and a non-identification pattern area, the dimming box comprises a first substrate, a second substrate, and a first liquid crystal layer, the first substrate is provided with a common viewing angle electrode, the second substrate is provided with a first viewing angle electrode and a second viewing angle electrode, the first viewing angle electrode comprises a first identification pattern electrode strip and a first non-identification pattern electrode, the second viewing angle electrode comprises a second identification pattern electrode strip, the first identification pattern electrode strip and the second identification pattern electrode strip both correspond to the identification pattern area, and the projections on the second substrate are parallel to each other and alternately distributed, the first non-identification pattern electrode corresponds to the non-identification pattern area, and the identification pattern is displayed by ambient light reflected by the semi-transparent and semi-reflective film to save power consumption.

Description

Display panel with switchable wide and narrow viewing angles, driving method and display device

Technical Field

The invention relates to the technical field of liquid crystal display, in particular to a display panel with switchable wide and narrow visual angles, a driving method and a display device.

Background

With the continuous progress of the liquid crystal display technology, the visual angle of the display is widened to more than 160 degrees from the original 112 degrees, and people enjoy the visual experience brought by a large visual angle and meanwhile want to effectively protect business confidentiality and personal privacy so as to avoid business loss or embarrassment caused by screen information leakage. In addition to the wide viewing angle requirement, there are many occasions where the display device is required to have a function of switching between wide and narrow viewing angles.

At present, the switching between the wide viewing angle and the narrow viewing angle is realized mainly by using a dimming box and a display box, the display box is used for controlling normal picture display, the dimming box is used for controlling viewing angle switching, the dimming box comprises a first substrate, a second substrate and a liquid crystal layer between the first substrate and the second substrate, and viewing angle control electrodes on the first substrate and the second substrate apply a vertical electric field to liquid crystal molecules, so that the liquid crystal deflects towards the vertical direction, and a narrow viewing angle mode is realized. Switching between a wide viewing angle and a narrow viewing angle can be achieved by controlling the voltage on the viewing angle control electrode. In order to improve the competitiveness of the product, the display panel of the prior art can also see the LOGO (trademark) pattern of the highlighted product when displaying the picture at a narrow viewing angle. But in the prior art, the LOGO pattern can be seen only under a large viewing angle of narrow viewing angle display, and the LOGO pattern can be seen only by opening the backlight source and the display box, so that the power consumption is high.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a display panel with a switchable wide and narrow viewing angles, a driving method and a display device, so that when the display panel enters a sleep mode, LOGO patterns are realized by utilizing ambient light reflection, the function diversity is realized, the power consumption is saved, and the product competitiveness is improved.

The invention provides a display panel with a switchable wide and narrow viewing angle, which comprises a display box and a dimming box laminated on the light emitting side of the display box, wherein a first polaroid is arranged on one side of the dimming box, which is far away from the display box, a semi-transparent and semi-reflective film is arranged between the dimming box and the display box, a second polaroid is arranged on one side of the display box, which is far away from the dimming box, a light transmission axis of the first polaroid is parallel to a light transmission axis of the semi-transparent and semi-reflective film, the light transmission axis of the second polaroid is perpendicular to the light transmission axis of the semi-transparent and semi-reflective film, the display panel is provided with a patterned identification pattern area and a non-identification pattern area, the dimming box comprises a first substrate, a second substrate which is arranged opposite to the first substrate, and a first liquid crystal layer arranged between the first substrate and the second substrate, a common viewing angle electrode is arranged on one side of the first substrate, which is towards the first liquid crystal layer, a first viewing angle electrode and a second viewing angle electrode which is matched with the common viewing angle electrode are arranged, the first viewing angle electrode and the second viewing angle electrode are mutually insulated, the first viewing angle electrode and the second viewing angle electrode is mutually isolated, the first viewing angle electrode and the second viewing angle electrode is mutually corresponding to the first identification pattern area and the first identification pattern strip and the second electrode pattern strip and the first electrode pattern strip and the second electrode pattern strip are alternately distributed on the first identification pattern and the first electrode strip and the second electrode pattern strip and the first electrode strip and non-identification pattern electrode strip and the first electrode pattern strip and second electrode pattern and non-identification electrode pattern electrode.

Further, the first non-identification pattern electrode is a block electrode corresponding to the non-identification pattern area, or the first non-identification pattern electrode comprises a plurality of first electrode strips, the second viewing angle electrode also comprises a second non-identification pattern electrode corresponding to the non-identification pattern area, the second non-identification pattern electrode comprises a plurality of second electrode strips, and projections of the first electrode strips and the second electrode strips on the second substrate are parallel to each other and are distributed alternately.

Further, the display panel is further provided with a patterned clock pattern area, the clock pattern area comprises a plurality of mutually independent stroke areas, the first viewing angle electrode further comprises a first clock control electrode strip, the second viewing angle electrode further comprises a second clock control electrode strip, the first clock control electrode strip and the second clock control electrode strip correspond to the clock pattern area, projections on the second substrate are mutually parallel and alternately distributed, the first clock control electrode strips in adjacent stroke areas are mutually insulated, and the second clock control electrode strips in adjacent stroke areas are mutually insulated.

The first signal electrode network comprises a first identification pattern electrode network, a first non-identification pattern electrode network, a first identification pattern signal line and a first clock pattern signal line, the first identification pattern electrode network corresponds to an identification pattern area, the first non-identification pattern electrode network corresponds to a non-identification pattern area, the first clock pattern electrode network corresponds to a clock pattern area, first identification pattern electrode strips are electrically connected with the first identification pattern electrode network, first clock control electrode strips are electrically connected with the first clock pattern electrode network, one end of the first identification pattern signal line is electrically connected with the first identification pattern electrode network, the other end of the first identification pattern signal line extends to the edge of the second substrate, one end of the first clock pattern signal line is electrically connected with the first clock pattern electrode network, the other end of the first clock pattern signal line extends to the edge of the second substrate, the first clock pattern electrode strips are arranged in the first clock pattern area, and the first clock control electrode strips are electrically connected with the first clock pattern electrode network, and the first clock control electrode strips are arranged in the first clock pattern area and correspond to each other clock pattern signal line.

Further, the first visual angle electrode and the second visual angle electrode are positioned on different layers, a second signal electrode net is further arranged on one side of the second substrate facing the first liquid crystal layer, and the second signal electrode net, the second visual angle electrode, the first signal electrode net and the first visual angle electrode are sequentially arranged in the direction facing the first liquid crystal layer; the second signal electrode network comprises a second identification pattern electrode network, a second non-identification pattern electrode network, a second clock pattern electrode network, a second identification pattern signal wire and a second clock pattern signal wire, wherein the second identification pattern electrode network corresponds to the identification pattern area, the second non-identification pattern electrode network corresponds to the non-identification pattern area, the second clock pattern electrode network corresponds to the clock pattern area, the second identification pattern electrode strip is electrically connected with the second identification pattern electrode network, the second clock control electrode strip is electrically connected with the second clock pattern electrode network, one end of the second identification pattern signal wire is electrically connected with the second identification pattern electrode network, the other end of the second identification pattern signal wire extends to the edge of the second substrate, one end of the second clock pattern signal wire is electrically connected with the second clock pattern electrode network, the other end of the second clock pattern signal wire extends to the edge of the second substrate, the second clock pattern electrode networks in adjacent stroke areas are mutually insulated, and one second clock pattern signal wire is correspondingly arranged in each stroke area.

Further, projections of grid lines in the first signal electrode network and the second signal electrode network on the second substrate are staggered.

The application further provides a driving method of the display panel, the driving method is used for driving the display panel with the switchable wide and narrow visual angles, the driving method comprises the steps of applying a common electrical signal to a common visual angle electrode in a wide visual angle mode, applying a first electrical signal to the whole first visual angle electrode and the whole second visual angle electrode, wherein the pressure difference between the first electrical signal and the common electrical signal is smaller than a first preset value or larger than a second preset value, applying a common electrical signal to the common visual angle electrode in a narrow visual angle mode, applying a second electrical signal to the whole first visual angle electrode and the whole second visual angle electrode, wherein the pressure difference between the second electrical signal and the common electrical signal is larger than a third preset value and smaller than a fourth preset value, applying a common electrical signal to a first identification pattern electrode bar in an identification pattern display mode, applying a fourth electrical signal to a second identification pattern electrode bar, and applying the pressure difference between the third electrical signal and the fourth electrical signal is larger than a fifth preset value and smaller than a sixth preset value in the wide visual angle mode and the narrow visual angle mode, and displaying a box in the open state in the display mode, and the display box in the first preset value and the fifth preset value are all in the display mode.

The display panel further comprises a patterned clock pattern area, the clock pattern area comprises a plurality of mutually independent stroke areas, the first visual angle electrode further comprises a first clock control electrode strip, the second visual angle electrode further comprises a second clock control electrode strip, the first clock control electrode strip and the second clock control electrode strip correspond to the clock pattern area, projections on the second substrate are mutually parallel and alternately distributed, the first clock control electrode strips in the adjacent stroke areas are mutually insulated, the second clock control electrode strips in the adjacent stroke areas are mutually insulated, the driving method further comprises the steps of applying a common electric signal to the common visual angle electrode in a clock display mode, applying a third electric signal to the first clock control electrode strip in the corresponding stroke area, and applying a fourth electric signal to the second clock control electrode strip in the corresponding stroke area, wherein the pressure difference between the third electric signal and the fourth electric signal is larger than a fifth preset value and smaller than a sixth preset value, and the display box can be simultaneously displayed in a closed state in the clock display mode.

Further, the first non-identification pattern electrode comprises a plurality of first electrode strips, the second visual angle electrode further comprises a second non-identification pattern electrode corresponding to the non-identification pattern area, the second non-identification pattern electrode comprises a plurality of second electrode strips, projections of the first electrode strips and the second electrode strips on the second substrate are parallel to each other and are distributed alternately, the driving method further comprises the steps of applying a common electric signal to the common visual angle electrode, applying a third electric signal to the whole first visual angle electrode and applying a fourth electric signal to the whole second visual angle electrode in a specular reflection mode, and the pressure difference between the third electric signal and the fourth electric signal is larger than a fifth preset value and smaller than a sixth preset value, wherein in the specular reflection mode, the display box is in a closed state.

The application also provides a display device which comprises the display panel with the switchable wide and narrow viewing angles.

The invention has the advantages that the semi-transparent and semi-reflective film is arranged between the light regulating box and the display box, the first identification pattern electrode strips and the second identification pattern electrode strips are arranged on the second substrate, and the projections of the first identification pattern electrode strips and the second identification pattern electrode strips on the second substrate are mutually parallel and alternately distributed, so that a fringe electric field can be formed and the deflection of liquid crystal molecules in the first liquid crystal layer in the horizontal direction can be controlled by controlling the pressure difference between the first identification pattern electrode strips and the second identification pattern electrode strips, the reflected light of the semi-transparent and semi-reflective film passes through the identification pattern area, the display of the identification patterns can be realized, the identification patterns can be seen under the front view angle, and the backlight source and the display box are not required to be opened when the identification patterns are displayed, so that the power consumption can be saved. In addition, the switching between wide and narrow viewing angles can be controlled by controlling the voltage difference between the common viewing angle electrode and the first viewing angle electrode and between the common viewing angle electrode and the second viewing angle electrode to form a vertical electric field and controlling the deflection of liquid crystal molecules in the first liquid crystal layer in the vertical direction. Moreover, the display of the wide and narrow viewing angles and the display of the identification pattern are independent from each other, and do not interfere with each other.

Drawings

FIG. 1 is a schematic plan view of a display device according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display device in an initial state according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram of a second substrate according to a first embodiment of the invention;

FIG. 4 is a schematic plan view of a first viewing angle electrode according to a first embodiment of the present invention;

FIG. 5 is a schematic plan view of a first signal electrode network according to a first embodiment of the present invention;

FIG. 6 is a schematic view showing a partial planar structure of a first clock pattern electrode network according to a first embodiment of the present invention;

FIG. 7 is a schematic plan view of a second viewing angle electrode according to a first embodiment of the present invention;

FIG. 8 is a schematic plan view of a second signal electrode network according to a first embodiment of the present invention;

FIG. 9 is a schematic diagram showing a partial planar structure of a second clock pattern electrode network according to a first embodiment of the present invention;

FIG. 10 is a diagram showing waveforms of signals of the display device at a wide viewing angle according to the first embodiment of the present invention;

FIG. 11 is a schematic diagram of a display device with a wide viewing angle according to an embodiment of the present invention;

FIG. 12 is a second signal waveform diagram of a display device with a wide viewing angle according to the first embodiment of the invention;

FIG. 13 is a second schematic diagram of a display device with a wide viewing angle according to the first embodiment of the present invention;

FIG. 14 is a simulation diagram of viewing angle and transmittance at a wide viewing angle for a display device according to an embodiment of the present invention and a related art display device;

Fig. 15 is a signal waveform diagram of a display device with a narrow viewing angle according to an embodiment of the present invention;

fig. 16 is a schematic view of a display device according to the first embodiment of the invention at a narrow viewing angle;

FIG. 17 is a simulation diagram of viewing angle and transmittance at a narrow viewing angle for a display device according to an embodiment of the present invention and a related art display device;

FIG. 18 is a signal waveform diagram of a display device in a sleep mode according to an embodiment of the invention;

fig. 19 is a schematic view showing the structure of the display device in the first embodiment of the invention when the identification pattern is displayed/the clock is displayed;

FIG. 20 is a schematic view showing a structure of a display device in specular reflection according to the first embodiment of the invention;

FIG. 21 is a schematic diagram of a display device according to a first embodiment of the present invention in the case of logo display/clock display/specular reflection;

FIG. 22 is a schematic diagram of a second substrate according to a second embodiment of the present invention;

Fig. 23 is a schematic plan view of a display device according to the present invention.

Detailed Description

In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given of the specific implementation, structure, characteristics and effects of the display panel and driving method, display device with switchable wide and narrow viewing angles, which are proposed according to the invention, by combining the accompanying drawings and the preferred embodiment:

example one

Fig. 1 is a schematic plan view of a display device according to a first embodiment of the invention. Fig. 2 is a schematic structural diagram of a display device in an initial state according to a first embodiment of the present invention. Fig. 3 is a schematic structural diagram of a second substrate according to a first embodiment of the invention. Fig. 4 is a schematic plan view of a first viewing angle electrode according to a first embodiment of the present invention. Fig. 5 is a schematic plan view of a first signal electrode network according to a first embodiment of the present invention. Fig. 6 is a schematic view showing a partial plane structure of a first clock pattern electrode network according to an embodiment of the invention. Fig. 7 is a schematic plan view of a second viewing angle electrode according to a first embodiment of the present invention. Fig. 8 is a schematic plan view of a second signal electrode network according to a first embodiment of the present invention. Fig. 9 is a schematic view showing a partial plane structure of a second clock pattern electrode network according to a first embodiment of the present invention.

As shown in fig. 1 to 9, a display panel with switchable wide and narrow viewing angles is provided in an embodiment of the invention. As shown in fig. 1, the display panel has a patterned LOGO pattern area 110 and a non-LOGO pattern area 120, where the pattern of the LOGO pattern area 110 may be set according to the LOGO pattern to be displayed actually (in this embodiment, the letter "V" is used as the LOGO pattern to be displayed in the LOGO pattern area 110). It will be appreciated that the display panel has a display area and a non-display area, and that both the LOGO pattern area 110 and the non-LOGO pattern area 120 are located in the display area so that the LOGO pattern can be displayed.

As shown in fig. 2 and 3, the display panel includes a dimming box 10 and a display box 20 that are stacked on each other, and the dimming box 10 is disposed above the display box 20, that is, the dimming box 10 is located on the light emitting side of the display box 20. The dimming box 10 is used for controlling the wide-narrow viewing angle switching of the display panel, and the display box 20 is used for controlling the display panel to display normal pictures. The first polaroid 31 is arranged on one side of the dimming box 10 away from the display box 20, the semi-transparent and semi-reflective film 32 is arranged between the dimming box 10 and the display box 20, and the second polaroid 33 is arranged on one side of the display box 20 away from the dimming box 10. The transflective film 32 has a reflective axis and a light transmission axis, the reflective axis of the transflective film 32 is perpendicular to the light transmission axis of the transflective film 32, the light transmission axis of the first polarizer 31 is parallel to the light transmission axis of the transflective film 32, and the light transmission axis of the second polarizer 33 is perpendicular to the light transmission axis of the transflective film 32. For example, the light transmission axes of the first polarizer 31 and the transflective film 32 are, for example, 0 °, the light reflection axis of the transflective film 32 is 90 °, and the light transmission axis of the second polarizer 33 is 90 °. The transflective film 32 is, for example, an APF polarizer. Further, a third polarizer 34 may be disposed on a side of the display box 20 near the light modulation box, and a light transmission axis of the third polarizer 34 is parallel to a light transmission axis of the transflective film 32.

The dimming box 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a first liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12. The first substrate 11 is provided with a common viewing angle electrode 111 on a side facing the first liquid crystal layer 13, and the second substrate 12 is provided with a first viewing angle electrode 14 and a second viewing angle electrode 16 which are matched with the common viewing angle electrode 111 on a side facing the first liquid crystal layer 13, and the first viewing angle electrode 14 and the second viewing angle electrode 16 are mutually insulated and spaced apart. Control of the wide-narrow viewing angle switching is achieved by controlling the voltage difference between the common viewing angle electrode 111 and the first viewing angle electrode 14 and between the common viewing angle electrode 111 and the second viewing angle electrode 16 to form a vertical electric field and control the deflection of the liquid crystal molecules in the first liquid crystal layer 13 in the vertical direction.

Further, as shown in fig. 2,3, 4 and 7, the first viewing angle electrode 14 includes a first identification pattern electrode bar 141 and a first non-identification pattern electrode 142, and the second viewing angle electrode 16 includes a second identification pattern electrode bar 161. The first and second identification pattern electrode bars 141 and 161 correspond to the identification pattern region 110, the first non-identification pattern electrode 142 corresponds to the non-identification pattern region 120, and projections of the first and second identification pattern electrode bars 141 and 161 on the second substrate 12 are parallel to each other and alternately distributed, i.e., the first and second identification pattern electrode bars 141 and 161 are parallel to each other and alternately distributed in the identification pattern region 110. By controlling the voltage difference between the first and second identification pattern electrode bars 141 and 161 to form a fringe electric field and controlling the deflection of the liquid crystal molecules in the first liquid crystal layer 13 in the horizontal direction corresponding to the identification pattern region 110, the reflected light of the transflective film 32 passes through the identification pattern region 110 to realize the display of the identification pattern, and the identification pattern can be seen under the front view angle, and power consumption can be saved without a backlight source and opening a display box when the identification pattern is displayed. It will be appreciated that the first viewing angle electrode 14 has the first identification pattern electrode bars 141 and the first non-identification pattern electrodes 142 insulated from each other, and thus, different electrical signals may be applied. The plurality of first identification pattern electrode bars 141 are electrically connected to the first identification pattern electrode net 151 through holes and have the same signal, and the plurality of second identification pattern electrode bars 161 are electrically connected to the first identification pattern electrode net 171 through holes and have the same signal.

In this embodiment, the first non-identification pattern electrode 142 includes a plurality of first electrode strips, the second viewing angle electrode 16 further includes a second non-identification pattern electrode 162 corresponding to the non-identification pattern region 120, the second non-identification pattern electrode 162 includes a plurality of second electrode strips, and the projections of the first electrode strips and the second electrode strips on the second substrate 12 are parallel and alternately distributed, i.e. the first electrode strips and the second electrode strips are parallel and alternately distributed in the non-identification pattern region 120, so that the effect of specular reflection can be achieved by controlling the pressure difference between the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161 and the pressure difference between the first electrode strips and the second electrode strips to form an edge electric field and controlling the deflection of all liquid crystal molecules in the first liquid crystal layer 13 in the horizontal direction, so that the reflected light of the transflective film 32 passes through the identification pattern region 110 and the non-identification pattern region 120.

As shown in fig. 1, 4 and 7, the display panel further has a patterned clock pattern area 130, where the clock pattern area 130 includes a plurality of stroke areas independent of each other, and the clock pattern area 130 is used for displaying time in the sleep mode. In this embodiment, the clock pattern area 130 is composed of 4 numbers "8" and a colon, and each number "8" is composed of 7 mutually independent stroke areas, such as 3 horizontal strokes and 4 vertical strokes, and the dark state and the bright state in each stroke area can be individually controlled, so that the number "8" can represent any one of numbers 0 to 9, and reference can be made to fig. 6 and 9. Because the colon is displayed and extinguished simultaneously and can be regarded as a stroke area, the upper and lower signals can be controlled independently, so that the clock pattern area 130 has 58 mutually independent stroke areas in total, and the background area of the clock display area 130 can also be controlled independently.

The first viewing angle electrode 14 further includes a first clock control electrode bar 143, the second viewing angle electrode 16 further includes a second clock control electrode bar 163, each of the first clock control electrode bar 143 and the second clock control electrode bar 163 corresponds to the clock pattern region 130, and projections of the first clock control electrode bar 143 and the second clock control electrode bar 163 on the second substrate 12 are parallel to each other and alternately distributed, that is, the first clock control electrode bar 143 and the second clock control electrode bar 163 are parallel to each other and alternately distributed in the clock pattern region 130. It will be appreciated that the first clock control electrode bars 143 in adjacent stroke zones are insulated from each other and the second clock control electrode bars 163 in adjacent stroke zones are insulated from each other so that the dark and light states in each stroke zone can be controlled individually. Therefore, the voltage difference between the first clock control electrode bar 143 and the second clock control electrode bar 163 can be controlled to form a fringe electric field and control the deflection of the liquid crystal molecules in the first liquid crystal layer 13 in the horizontal direction in the corresponding clock pattern area 130, so that the reflected light of the transflective film 32 passes through the clock pattern area 130 to realize the display of the clock pattern, and the backlight is not required and the display box is not required to be opened when the clock pattern is displayed, and the power consumption can be saved.

Further, as shown in fig. 3, the widths a of the first and second identification pattern electrode bars 141, 161, 143, 163, and the second electrode bars are 2-4 μm, for example, 3.5 μm. The spacing b between adjacent two first identification pattern electrode bars 141, between adjacent two second identification pattern electrode bars 161, between adjacent two first clock control electrode bars 143, between adjacent two second clock control electrode bars 163, between adjacent two first electrode bars, and between adjacent two second electrode bars is 4-6 μm, for example 5.5 μm. Referring to fig. 6 and 9, the width of each of the clock pattern areas 130 is 2mm, the middle area of the numeral "8" is a square with a side length of 5mm, the interval between two adjacent numerals "8" is 4.5mm, and the height of the entire clock pattern area 130 is 20mm. Thus, each stroke zone is provided with approximately 200 first clock-controlled electrode bars 143 and second clock-controlled electrode bars 163. Of course, in practical applications, the size of the clock pattern area 130 may be adjusted according to practical needs.

As shown in fig. 1, 3, 5 and 6, a first signal electrode network 15 is further disposed on a side of the second substrate 12 facing the first liquid crystal layer 13, the first signal electrode network 15 and the first viewing angle electrode 14 are located on different layers and are spaced apart from each other by an insulating layer, the first signal electrode network 15 is bridged with the first viewing angle electrode 14 in a diamond shape in the whole display area, the first viewing angle electrode 14 and the first signal electrode network 15 are electrically connected by punching, and the signals are the same.

The first signal electrode network 15 includes a first identification pattern electrode network 151, a first non-identification pattern electrode network 152, a first clock pattern electrode network 153, a first identification pattern signal line 154, and a first clock pattern signal line 155, the first identification pattern electrode network 151 corresponding to the identification pattern region 110, the first non-identification pattern electrode network 152 corresponding to the non-identification pattern region 120, and the first clock pattern electrode network 153 corresponding to the clock pattern region 130.

The first identification pattern electrode bar 141 is electrically connected to the first identification pattern electrode net 151 through a contact hole, one end of the first identification pattern signal line 154 is electrically connected to the first identification pattern electrode net 151, and the other end of the first identification pattern signal line 154 extends to the edge of the second substrate 12, so that an electrical signal is applied to the first identification pattern electrode bar 141 through the first identification pattern signal line 154. The first clock control electrode bar 143 is electrically connected to the first clock pattern electrode net 153 through a contact hole, one end of the first clock pattern signal line 155 is electrically connected to the first clock pattern electrode net 153, and the other end of the first clock pattern signal line 155 extends to the edge of the second substrate 12, so that an electrical signal is applied to the first clock control electrode bar 143 through the first clock pattern signal line 155.

As shown in fig. 5 and 6, the first clock pattern electrode networks 153 in adjacent stroke areas are insulated from each other, each stroke area is correspondingly provided with one first clock pattern signal line 155, only a part of the first clock pattern signal lines 155 corresponding to the stroke areas are shown in fig. 5, and in particular, each numeral "8" has 7 mutually independent stroke area compositions, so that each numeral "8" is correspondingly provided with 7 first clock pattern signal lines 155, and thus an electric signal can be applied to each stroke area individually. Because the colon is displayed and extinguished simultaneously, the colon can be regarded as a stroke area, only one first clock pattern signal line 155 is required to be arranged, and the upper layer signal and the lower layer signal can be independently controlled, so that 58 first clock pattern signal lines 155 are required to be applied to the clock pattern area 130 in total, and the background area corresponding to the clock area 130 can be independently controlled.

In this embodiment, the first non-identification pattern electrode 142 and the first non-identification pattern electrode mesh 152 are insulated from each other, and the electrical signal can be directly applied to the first non-identification pattern electrode 142 from the edge of the second substrate 12, and the non-identification pattern region 120 is correspondingly provided with the first non-identification pattern electrode mesh 152, so that the uniformity of display can be increased. Of course, in other embodiments, the first non-identification pattern electrode 142 may also be electrically connected to the first non-identification pattern electrode network 152 through a contact hole, so that an electrical signal is applied to the first non-identification pattern electrode 142 through the first non-identification pattern electrode network 152.

As shown in fig. 2, 3, 8 and 9, in the present embodiment, the first viewing angle electrode 14 and the second viewing angle electrode 16 are located in different layers and are separated from each other by an insulating layer, and a second signal electrode net 17 is further disposed on a side of the second substrate 12 facing the first liquid crystal layer 13. The second signal electrode net 17, the second viewing angle electrode 16, the first signal electrode net 15, and the first viewing angle electrode 14 are sequentially disposed in a direction toward the first liquid crystal layer 13 and are spaced apart from each other by an insulating layer. Of course, in other embodiments, the first viewing electrode 14 and the second viewing electrode 16 may be located on the same layer, and the second viewing electrode 16 may apply the electrical signal through the first signal electrode net 15, but this design greatly increases the difficulty of the manufacturing process. The second signal electrode net 17 is bridged with the second viewing angle electrode 16 in a diamond shape in the whole display area, and the second viewing angle electrode 16 and the second signal electrode net 17 are electrically connected through punching, and the signals are the same.

The second signal electrode net 17 includes a second identification pattern electrode net 171, a second non-identification pattern electrode net 172, a second clock pattern electrode net 173, a second identification pattern signal line 174, and a second clock pattern signal line 175, the second identification pattern electrode net 171 corresponding to the identification pattern region 110, the second non-identification pattern electrode net 172 corresponding to the non-identification pattern region 120, and the second clock pattern electrode net 173 corresponding to the clock pattern region 130.

The second identification pattern electrode bars 161 are electrically connected to the second identification pattern electrode net 171 through contact holes, one end of the second identification pattern signal lines 174 are electrically connected to the second identification pattern electrode net 171, and the other end of the second identification pattern signal lines 174 extend to the edge of the second substrate 12, so that an electrical signal is applied to the second identification pattern electrode bars 161 through the second identification pattern signal lines 174. The second clock control electrode bar 163 is electrically connected to the second clock pattern electrode net 173, one end of the second clock pattern signal line 175 is electrically connected to the second clock pattern electrode net 173, and the other end of the second clock pattern signal line 175 extends to the edge of the second substrate 12, so that an electrical signal is applied to the second clock control electrode bar 163 through the second clock pattern signal line 175.

As shown in fig. 8 and 9, the second clock pattern electrode networks 173 in adjacent stroke areas are insulated from each other, and each stroke area is correspondingly provided with one second clock pattern signal line 175, and only a part of the second clock pattern signal lines 175 corresponding to the stroke areas are shown in fig. 8, specifically, each digit "8" has 7 mutually independent stroke area compositions, so that each digit "8" is correspondingly provided with 7 second clock pattern signal lines 175, and thus, an electric signal can be applied to each stroke area individually. While, since the colon is simultaneously displayed and extinguished, which can be regarded as one stroke area, only 1 second clock pattern signal line 175 needs to be provided, and thus the clock pattern area 130 requires 58 second clock pattern signal lines 175 in total to apply an electrical signal.

In this embodiment, the second non-identification pattern electrode 162 and the second non-identification pattern electrode mesh 172 are insulated from each other, and an electrical signal can be directly applied to the second non-identification pattern electrode 162 from the edge of the second substrate 12, and the non-identification pattern region 120 is correspondingly provided with the second non-identification pattern electrode mesh 172, so that the uniformity of display can be increased. Of course, in other embodiments, the second non-identification pattern electrode 162 may also be electrically connected to the second non-identification pattern electrode net 172 through a contact hole, so that an electrical signal is applied to the second non-identification pattern electrode 162 through the second non-identification pattern electrode net 172.

As can be seen from fig. 4 and7, each of the number "8" middle regions further has two non-identification pattern regions 120, since the adjacent two stroke regions are spaced apart from each other independently, the non-identification pattern region 120 of each of the number "8" middle regions can be connected to the non-identification pattern region 120 of each of the number "8" peripheral regions from the gap between the adjacent two stroke regions, i.e., the first non-identification pattern electrode 142 of each of the number "8" middle regions can be connected to the first non-identification pattern electrode 142 of each of the number "8" peripheral regions from the gap between the adjacent two stroke regions, and similarly, the second non-identification pattern electrode 162. Of course, a signal line may be provided in the first signal electrode network 15 to the first non-identification pattern electrode network 152 of each digital "8" middle region, the first non-identification pattern electrode 142 of each digital "8" middle region is electrically connected to the first non-identification pattern electrode network 152, an electric signal is applied to the first non-identification pattern electrode 142 of each digital "8" middle region through the signal line, a signal line may be provided in the second signal electrode network 17 to the second non-identification pattern electrode network 172 of each digital "8" middle region, the second non-identification pattern electrode 162 of each digital "8" middle region is electrically connected to the second non-identification pattern electrode network 172, and an electric signal is applied to the second non-identification pattern electrode 162 of each digital "8" middle region through the signal line.

In the present embodiment, projections of grid lines in the first signal electrode network 15 and the second signal electrode network 17 on the second substrate 12 overlap each other, thereby reducing the influence of the first signal electrode network 15 and the second signal electrode network 17 on the light transmittance. Of course, the grid lines in the first signal electrode network 15 and the second signal electrode network 17 may be offset from each other, which is not limited thereto.

Further, the second substrate 12 is further provided with an insulating layer on a side facing the first liquid crystal layer 13, and the insulating layer covers the first viewing angle electrode 14, so as to prevent the first viewing angle electrode 14 from being shorted with the common viewing angle electrode 111.

In this embodiment, the first liquid crystal layer 13 preferably employs positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy. The phase retardation of the first liquid crystal layer 13 is preferably 800nm, optionally in the range 500nm < phase retardation <1000nm. As shown in fig. 2, at the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the first substrate 11 and the second substrate 12, and the alignment direction of the positive liquid crystal molecules near the first substrate 11 is parallel or antiparallel to the alignment direction of the positive liquid crystal molecules near the second substrate 12, so that the dimming cell 10 exhibits a wide viewing angle display at the initial state, as shown in fig. 11. Optionally, the alignment direction of the first liquid crystal layer 13 is 5 ° to 10 °, preferably 7 °, with respect to the length direction of the electrode bars in the first viewing angle electrode 14 and the second viewing angle electrode 16, so that the positive liquid crystal molecules in the first liquid crystal layer 13 can be accelerated to deflect in the horizontal direction during the display of the logo pattern, the clock display, and the specular reflection. Of course, the positive liquid crystal molecules in the first liquid crystal layer 13 may also have a pretilt angle of 3 ° -7 ° at the beginning, so that the positive liquid crystal molecules in the first liquid crystal layer 13 may be accelerated to deflect in the vertical direction at a narrow viewing angle.

In this embodiment, as shown in fig. 1, the identification pattern area 110 is located at the center of the display panel, the clock pattern area 130 is located at the lower right corner of the display panel, and the other areas of the display panel except for the identification pattern area 110 and the clock pattern area 130 are non-identification pattern areas 120. Of course, the positions of the LOGO pattern area 110 and the clock pattern area 130 may also be set according to the position where the LOGO pattern needs to be displayed and the position where the clock pattern is displayed.

In this embodiment, the display cell 20 is preferably a liquid crystal cell. Of course, in other embodiments, the display box 20 may be a self-luminous display (e.g. OLED display, micro LED display), but the dimming box 10 needs to be disposed above the display box 20.

The display box 20 includes a color film substrate 21, an array substrate 22 disposed opposite to the color film substrate 21, and a second liquid crystal layer 23 disposed between the color film substrate 21 and the array substrate 22. The second liquid crystal layer 23 preferably employs positive liquid crystal molecules, i.e., liquid crystal molecules having positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the second liquid crystal layer 23 are aligned parallel to the color film substrate 21 and the array substrate 22, and the positive liquid crystal molecules on the side close to the color film substrate 21 are aligned parallel or antiparallel to the alignment direction of the positive liquid crystal molecules on the side close to the array substrate 22. Of course, in other embodiments, the second liquid crystal layer 23 may also use negative liquid crystal molecules, and the negative liquid crystal molecules in the second liquid crystal layer 23 may be aligned perpendicular to the color film substrate 21 and the array substrate 22, i.e. in an alignment manner similar to the VA display mode.

The color film substrate 21 is provided with a color resistance layer 212 arranged in an array and a black matrix 211 for spacing the color resistance layer 212, wherein the color resistance layer 212 comprises red (R), green (G) and blue (B) color resistance materials, and sub-pixels of the red (R), green (G) and blue (B) colors are correspondingly formed.

The array substrate 22 is defined by a plurality of scan lines (not shown) and a plurality of data lines (not shown) on a side facing the second liquid crystal layer 23, and each pixel unit is provided therein with a pixel electrode 222 and a thin film transistor (not shown), and the pixel electrode 222 is electrically connected to the data line adjacent to the thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, wherein the gate electrode and the scan line are disposed on the same layer and electrically connected, the gate electrode and the active layer are separated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the pixel electrode 222 are electrically connected by a contact hole.

As shown in fig. 2, in the present embodiment, a common electrode 221 is further disposed on a side of the array substrate 22 facing the second liquid crystal layer 23, and the common electrode 221 and the pixel electrode 222 are located on different layers and are insulated and isolated by an insulating layer. The common electrode 221 may be located above or below the pixel electrode 222 (the common electrode 221 is shown below the pixel electrode 222 in fig. 2). Preferably, the common electrode 221 is a planar electrode disposed entirely, and the pixel electrode 222 is a block electrode disposed entirely within each pixel unit or a slit electrode having a plurality of electrode bars to form a fringe field switching pattern (FRINGE FIELD SWITCHING, FFS). Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located at the same layer, but they are insulated from each other, and each of the pixel electrode 222 and the common electrode 221 may include a plurality of electrode bars, and the electrode bars of the pixel electrode 222 and the electrode bars of the common electrode 221 are alternately arranged with each other to form an In-plane switching mode (In-PLANE SWITCHING, IPS), or In other embodiments, the array substrate 22 is provided with the pixel electrode 222 on a side facing the second liquid crystal layer 23, and the color film substrate 21 is provided with the common electrode 221 on a side facing the second liquid crystal layer 23 to form a TN mode or a VA mode.

The first substrate 11, the second substrate 12, the color film substrate 21, and the array substrate 22 may be made of glass, acrylic, polycarbonate, or the like. The materials of the common viewing angle electrode 111, the first viewing angle electrode 14, the second viewing angle electrode 16, the common electrode 221, and the pixel electrode 222 may be Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), or the like. The first and second signal electrode nets 15 and 17 may be copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), nickel (Ni), etc., or a combination of the above metals, for example, a metal having a small resistance such as Al/Mo, cu/Mo, etc.

The invention also provides a display device which comprises the display panel with the switchable wide and narrow visual angles and the backlight module 40, wherein the backlight module 40 is positioned below the display panel and is used for providing a backlight source for the display panel. Of course, if the display case 20 employs a self-luminous display, no additional backlight is required.

The backlight module 40 includes a backlight 41 and a peep-proof layer 43, wherein the peep-proof layer 43 is used for reducing the range of the light emitting angle. A brightness enhancement film 42 is further disposed between the backlight 41 and the peep-proof layer 43, and the brightness enhancement film 42 increases the brightness of the backlight module 40. The peep-proof layer 43 is a micro shutter structure, which can block light with a larger incident angle, so that light with a smaller incident angle passes through the shutter structure, and the angle range of the light passing through the peep-proof layer 43 is reduced. The peep-proof layer 43 comprises a plurality of parallel light-resisting walls and light holes between two adjacent light-resisting walls, and light-absorbing materials are arranged on two sides of the light-resisting walls. Of course, the backlight 41 may be a light-collecting type backlight, so that the peep-proof layer 43 is not required, but the light-collecting type backlight is more expensive than a conventional backlight. The backlight module 40 may be a side-in type backlight module or a direct type backlight module. Preferably, the backlight module 40 adopts a collimated backlight (CBL, collimated backlight) mode, which can collect light to ensure display effect.

Fig. 10 is a signal waveform diagram of a display device with a wide viewing angle according to an embodiment of the invention. Fig. 11 is a schematic diagram of a display device with a wide viewing angle according to an embodiment of the invention. Fig. 12 is a second signal waveform diagram of the display device at a wide viewing angle in the first embodiment of the invention. Fig. 13 is a second schematic view of a display device with a wide viewing angle according to the first embodiment of the present invention. Fig. 14 is a simulation diagram of viewing angle and transmittance at a wide viewing angle for a display device according to an embodiment of the present invention and a related art display device. Fig. 15 is a signal waveform diagram of a display device with a narrow viewing angle according to an embodiment of the invention. Fig. 16 is a schematic view of a display device with a narrow viewing angle according to the first embodiment of the present invention. Fig. 17 is a simulation diagram of viewing angle and transmittance at a narrow viewing angle for a display device according to an embodiment of the present invention and related art. Fig. 18 is a signal waveform diagram of the display device in the sleep mode according to the first embodiment of the invention. Fig. 19 is a schematic view showing the structure of the display device in the display of the identification pattern/clock display in the first embodiment of the present invention. Fig. 20 is a schematic diagram of a display device in a specular reflection mode according to a first embodiment of the invention. Fig. 21 is a schematic diagram of a display device according to a first embodiment of the present invention in the case of logo display/clock display/specular reflection.

As shown in fig. 10 to 21, the present application also provides a driving method for driving the wide and narrow viewing angle switchable display panel as described above, the driving method including applying a common electric signal Vcom to the common viewing angle electrode 111 in the wide viewing angle mode, wherein the common electric signal Vcom is a direct current common voltage signal, and applying a first electric signal V1 to both the entire first viewing angle electrode 14 (i.e., the first identification pattern electrode bar 141, the first non-identification pattern electrode 142, and the first clock control electrode bar 143) and the entire second viewing angle electrode 16 (i.e., the second identification pattern electrode bar 161, the second non-identification pattern electrode 162, and the second clock control electrode bar 163), and a voltage difference between the first electric signal V1 and the common electric signal Vcom is less than a first preset value (e.g., less than 0.8V). Preferably, as shown in fig. 10, the common viewing angle electrode 111, the entire first viewing angle electrode 14, and the entire second viewing angle electrode 16 are all applied with an alternating voltage of 0.8V. A vertical electric field is not formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14 and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16, and the positive liquid crystal molecules in the first liquid crystal layer 13 are not deflected substantially and keep an initial flat lying state (fig. 2 and 11), so that the light modulation box 10 presents a wide viewing angle display.

Of course, the voltage difference between the first electric signal V1 and the common electric signal Vcom may also be greater than a second preset value (e.g. greater than 5.0V), for example, the common viewing angle electrode 111 applies a dc voltage of 0V (fig. 12), the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16 each apply an ac voltage of 5.0V, where the second preset value is far greater than the first preset value, a strong vertical electric field (E2 in fig. 13) is formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14 and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16, and positive liquid crystal molecules in the first liquid crystal layer 13 deflect greatly and are perpendicular to the first substrate 11 and the second substrate 12, as shown in fig. 13, and the light adjusting box 10 also presents a wide viewing angle display.

As shown in fig. 15 and 16, in the narrow viewing angle mode, the common electric signal Vcom is applied to the common viewing angle electrode 111, the second electric signal V2 is applied to the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16, the voltage difference between the second electric signal V2 and the common electric signal Vcom is larger than the third preset value (for example, larger than 1.5V) and smaller than the fourth preset value (for example, smaller than 4.0V), wherein the first preset value < the third preset value < the fourth preset value < the second preset value, and a strong vertical electric field (E3 in fig. 16) is formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14 and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16, and positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and in an inclined state, and the luminance is darkened under the large viewing angle, and the light adjusting box 10 presents the narrow viewing angle display.

Specifically, the second electric signal V2 includes a first voltage V21 and a second voltage V22, the first voltage V21 is applied across the first viewing angle electrode 14, and the second voltage V22 is applied across the second viewing angle electrode 16. Since the first viewing angle electrode 14 and the second viewing angle electrode 16 are located at different layers, in order to avoid the influence of the difference in distance from the common viewing angle electrode 111, the first voltage V21 is smaller than the second voltage V22 and the difference in voltage is 0.1-0.5V, for example 0.2V. The first voltage V21 is, for example, 2.6V, and the second voltage V22 is, for example, 2.8V, so that the intensity of the vertical electric field formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16, respectively, is the same, and a narrow viewing angle effect is ensured.

Further, in the narrow viewing angle mode, a large voltage difference may be provided between the first and second logo electrode stripes 141 and 161 and a large horizontal electric field may be formed, and the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the horizontal direction, so that the reflected light of the transflective film 32 passes through the logo pattern area 110, so that display of the logo pattern may be achieved in the narrow viewing angle mode at a large viewing angle. Of course, in the narrow viewing angle mode, a larger voltage difference between the first clock control electrode bar 143 and the second clock control electrode bar 163 may form a larger horizontal electric field, and positive liquid crystal molecules in corresponding stroke regions in the first liquid crystal layer 13 are deflected greatly in the horizontal direction, so that reflected light of the transflective film 32 passes through the corresponding stroke regions, and display of a clock pattern may be achieved in the wide viewing angle mode. In the front view, the identification pattern and the clock pattern cannot be seen clearly due to the high intensity of the transmitted backlight brightness.

Fig. 14 is a simulation diagram of viewing angle and transmittance at a wide viewing angle for a display device according to an embodiment of the present invention and a simulation diagram of viewing angle and transmittance at a narrow viewing angle for a display device according to an embodiment of the present invention and a simulation diagram of viewing angle and transmittance for a display device according to a prior art. Fig. 14 is a graph W1 showing a simulation curve of viewing angle and transmittance of the display device at a wide viewing angle in the first embodiment of the present invention, and fig. 14 is a graph W2 showing a simulation curve of viewing angle and transmittance of the display device at a wide viewing angle in the prior art, as can be seen from fig. 14, the effect of the wide viewing angle in the first embodiment of the present invention is almost the same as the effect of the wide viewing angle in the prior art. Fig. 17 is a graph N1 showing a simulation curve of viewing angle and transmittance of the display device at a narrow viewing angle in the first embodiment of the present invention, and fig. 17 is a graph N2 showing a simulation curve of viewing angle and transmittance of the display device at a narrow viewing angle in the prior art, and as can be seen from fig. 17, the effect of the narrow viewing angle in the first embodiment of the present invention is almost the same as the effect of the narrow viewing angle in the prior art. Namely, the invention can realize the display of the identification pattern, the clock display and the specular reflection on the premise of ensuring better wide-view angle and narrow-view angle effects.

In the wide viewing angle mode and the narrow viewing angle mode, the display box 20 and the backlight module 40 are opened, corresponding gray scale voltages are applied to the pixel electrodes 222, a voltage difference is formed between the pixel electrodes 222 and the common electrode 221, a horizontal electric field is generated (E1 in fig. 11, 13 and 16), positive liquid crystal molecules are deflected in the horizontal direction towards the direction parallel to the horizontal electric field, the gray scale voltages comprise 0-255 gray scale voltages, and when different gray scale voltages are applied to the pixel electrodes 222, the pixel units display different brightness, so that different pictures are displayed, and normal display of the display device under the wide viewing angle and the narrow viewing angle is realized.

As shown in fig. 18 and 19, in the logo pattern display mode, the common electric signal Vcom is applied to the common viewing angle electrode 111, the third electric signal V3 is applied to the first logo pattern electrode bar 141, the fourth electric signal V4 is applied to the second logo pattern electrode bar 161, the voltage difference between the third electric signal V3 and the fourth electric signal V4 is greater than a fifth preset value (e.g., greater than 1.5V) and less than a sixth preset value (e.g., less than 10V), in this embodiment, the first preset value < the fifth preset value < the sixth preset value, the common electric signal Vcom and the fourth electric signal V4 are both 0V dc voltage, and the third electric signal V3 is an ac voltage of, e.g., 4.0V. At this time, a large horizontal electric field (E4 in fig. 19) is formed between the first and second identification pattern electrode bars 141 and 161, and the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the horizontal direction, so that the reflected light of the transflective film 32 passes through the identification pattern region 110, thereby realizing the display of the identification pattern. Of course, a small vertical electric field is also formed between the first identification pattern electrode bar 141 and the common viewing angle electrode 111, and the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected in the vertical direction, so that the vertical electric field is negligible. In other embodiments, the fourth electrical signal V4 may also be an ac voltage of opposite polarity to the third electrical signal V3, for example an ac voltage of-4.0V.

In the clock display mode, the principle is similar to that of the logo display mode. Specifically, the common electric signal Vcom is applied to the common viewing angle electrode 111, the third electric signal V3 is applied to the first clock control electrode bar 143 in the corresponding stroke area, the fourth electric signal V4 is applied to the second clock control electrode bar 163, and the pressure difference between the third electric signal V3 and the fourth electric signal V4 is greater than a fifth preset value (e.g., greater than 1.5V) and less than a sixth preset value (e.g., less than 10V). In the present embodiment, the common electric signal Vcom and the fourth electric signal V4 are both 0V dc voltage, and the third electric signal V3 is, for example, 4.0V ac voltage. A larger horizontal electric field is formed between the first clock control electrode bar 143 and the second clock control electrode bar 163 in the corresponding stroke area, and positive liquid crystal molecules in the corresponding stroke area in the first liquid crystal layer 13 are deflected greatly in the horizontal direction, so that reflected light rays of the transflective film 32 pass through the corresponding stroke area, and dark state and bright state in each stroke area can be controlled independently, so that the number "8" can represent any one of numbers 0-9, and display of a digital clock is realized. Of course, in other embodiments, the fourth electrical signal V4 may be an ac voltage having a polarity opposite to that of the third electrical signal V3, for example, an ac voltage of-4.0V.

As shown in fig. 18 and 20, in the specular reflection mode, the principle is similar to that of the logo pattern display mode. Specifically, the common electric signal Vcom is applied to the common viewing angle electrode 111, the third electric signal V3 is applied to the entire first viewing angle electrode 14, the fourth electric signal V4 is applied to the entire second viewing angle electrode 16, and the pressure difference between the third electric signal V3 and the fourth electric signal V4 is greater than a fifth preset value (e.g., greater than 1.5V) and less than a sixth preset value (e.g., less than 10V). In the present embodiment, the common electric signal Vcom and the fourth electric signal V4 are both 0V dc voltage, and the third electric signal V3 is, for example, 4.0V ac voltage. A large horizontal electric field (E5 in fig. 20) is formed between the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16, and all positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the horizontal direction, so that the reflected light of the transflective film 32 passes through the logo pattern area 110, the non-logo pattern area 120 and the clock pattern area 130 to realize specular reflection. Of course, in other embodiments, the fourth electrical signal V4 may be an ac voltage having a polarity opposite to that of the third electrical signal V3, for example, an ac voltage of-4.0V.

As shown in fig. 21, in the logo pattern display mode, the first liquid crystal layer 13 in the logo pattern area 110 has an effective phase retardation, and after passing through the first polarizer 31, external ambient light forms linear polarized light parallel to the light transmission axis of the first polarizer 31, after passing through the first liquid crystal layer 13, circularly polarized light or elliptically polarized light is formed, and part of the light is reflected by the transflective film 32 and passes through the first liquid crystal layer 13, circularly polarized light or elliptically polarized light is formed, and part of the light passes through the first polarizer 31, so that the logo pattern area 110 presents a bright state. Since the non-identification pattern region 120 does not form a fringe electric field, positive liquid crystal molecules in the first liquid crystal layer 13 maintain an initial state, external ambient light passes through the first polarizer 31 to form linearly polarized light parallel to the light transmission axis of the first polarizer 31, and after passing through the first liquid crystal layer 13 or linearly polarized light parallel to the light transmission axis of the first polarizer 31, all of the light passes through the semi-transparent and semi-reflective film 32 finally, no light is reflected back by the semi-transparent and semi-reflective film 32, so that the non-identification pattern region 120 presents a dark state. Similarly, the principle of the clock display mode and the specular reflection mode is the same as that of the identification pattern display mode, and the description thereof is omitted.

In the logo display mode, the clock display mode, and the mirror reflection mode, the display box 20 and the backlight module 40 are turned off, and the display is realized by using the reflected light of the transflective film 32. And the identification pattern display mode and the clock display mode may be displayed at the same time. In the logo pattern display mode, the clock display mode, and the specular reflection mode, since the pictures are substantially the same, the frequency of the third electric signal V3 may be lower, for example, 1Hz. The frames of the wide view angle and the narrow view angle are different, and the driving frequency of the first electric signal V1 and the second electric signal V2 is 60 Hz-150 Hz.

Example two

Fig. 22 is a schematic structural diagram of a second substrate in the second embodiment of the invention. As shown in fig. 22, the display panel and the driving method with switchable wide and narrow viewing angles provided in the second embodiment of the present invention are substantially the same as those of the first embodiment (fig. 1 to 21), except that in the present embodiment, the first non-identification pattern electrode 142 is a block electrode corresponding to the non-identification pattern region 120, and the second viewing angle electrode 16 does not need to be provided with the second non-identification pattern electrode 162 in the region corresponding to the non-identification pattern region 120. Of course, the second viewing angle electrode 16 may be provided with the second non-identification pattern electrode 162 in a region corresponding to the non-identification pattern region 120, but the second non-identification pattern electrode 162 has little effect. Of course, the second non-identification pattern electrode net 172 of the non-identification pattern region 120 may be omitted, but the provision of the second non-identification pattern electrode net 172 may make the picture display more uniform.

Since the first non-identification pattern electrode 142 is a block electrode corresponding to the non-identification pattern region 120, the fringe electric field cannot be formed in the non-identification pattern region 120, and thus the specular reflection mode cannot be realized in the present embodiment, but the wide viewing angle mode, the narrow viewing angle mode, the identification pattern display mode, and the clock display mode can still be realized.

Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.

Fig. 23 is a schematic plan view of a display device according to the present invention. Referring to fig. 23, the display device is provided with a display mode switching key 50 for a user to send a display mode switching request to the display device. In this embodiment, the display mode switching key 50 may be a physical key (as shown in fig. 23). Of course, in other embodiments, the display mode switching key 50 may also be a software control or Application (APP) to implement a switching function (e.g., setting the display mode by a slider bar). When a user needs to switch between a wide viewing angle, a narrow viewing angle and a sleep mode, a viewing angle switching request can be sent to the display device by operating the viewing angle switching key 50, and finally different electric signals are applied to the common viewing angle electrode 111, the first viewing angle electrode 14 and the second viewing angle electrode 16 under the control of the driving chip 60, so that the display device can realize the switching between the wide viewing angle and the narrow viewing angle. Therefore, the display device provided by the embodiment of the invention has stronger operation flexibility and convenience, and achieves the aim of integrating entertainment video and privacy confidentiality.

In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.

The present invention is not limited to the preferred embodiments, and the present invention is described above in any way, but is not limited to the preferred embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the embodiments described above, when the technical content disclosed above can be utilized to make a little change or modification, the technical content disclosed above is equivalent to the equivalent embodiment of the equivalent change, but any simple modification, equivalent change and modification made to the above embodiment according to the technical substance of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. The display panel with the switchable wide and narrow viewing angles is characterized by comprising a display box (20) and a light regulating box (10) which is laminated on the light emitting side of the display box (20), wherein a first polaroid (31) is arranged on one side, far away from the display box (20), of the light regulating box (10), a semi-transparent semi-reflective film (32) is arranged between the light regulating box (10) and the display box (20), a second polaroid (33) is arranged on one side, far away from the light regulating box (10), of the display box (20), the light transmitting shaft of the first polaroid (31) is parallel to the light transmitting shaft of the semi-transparent semi-reflective film (32), the light transmitting shaft of the second polaroid (33) is perpendicular to the light transmitting shaft of the semi-transparent semi-reflective film (32), and the light reflecting shaft of the semi-transparent semi-reflective film (32) is perpendicular to the light transmitting shaft of the semi-transparent semi-reflective film (32);

The display panel is provided with a patterned identification pattern area (110) and a non-identification pattern area (120), the dimming box (10) comprises a first substrate (11), a second substrate (12) which is arranged opposite to the first substrate (11) and a first liquid crystal layer (13) which is arranged between the first substrate (11) and the second substrate (12), one side of the first substrate (11) facing the first liquid crystal layer (13) is provided with a common visual angle electrode (111), one side of the second substrate (12) facing the first liquid crystal layer (13) is provided with a first visual angle electrode (14) and a second visual angle electrode (16) which are matched with the common visual angle electrode (111), the first visual angle electrode (14) and the second visual angle electrode (16) are mutually insulated and are separated, the first visual angle electrode (14) comprises a first identification pattern electrode bar (141) and a first non-identification pattern electrode (142), the second visual angle electrode (16) comprises a second identification pattern electrode bar (161), the first visual angle electrode (141) and the first visual angle electrode (141) are matched with the first visual angle electrode (142) and the non-identification pattern area (120) respectively, projections of the first identification pattern electrode strips (141) and the second identification pattern electrode strips (161) on the second substrate (12) are parallel to each other and are alternately distributed.

2. The switchable wide and narrow viewing angle display panel according to claim 1, wherein the first non-identification pattern electrode (142) is a block electrode corresponding to the non-identification pattern region (120), or wherein the first non-identification pattern electrode (142) comprises a plurality of first electrode stripes, the second viewing angle electrode (16) further comprises a second non-identification pattern electrode (162) corresponding to the non-identification pattern region (120), the second non-identification pattern electrode (162) comprises a plurality of second electrode stripes, and projections of the first electrode stripes and the second electrode stripes on the second substrate (12) are parallel to each other and alternately distributed.

3. The wide and narrow viewing angle switchable display panel according to claim 1, characterized in that the display panel further has a patterned clock pattern area (130), the clock pattern area (130) comprising a plurality of mutually independent stroke areas, the first viewing angle electrode (14) further comprising a first clock control electrode stripe (143), the second viewing angle electrode (16) further comprising a second clock control electrode stripe (163), the first clock control electrode stripe (143) and the second clock control electrode stripe (163) each corresponding to the clock pattern area (130), and projections on the second substrate (12) are mutually parallel and alternately distributed, the first clock control electrode stripes (143) in adjacent ones of the stroke areas are mutually insulated, and the second clock control electrode stripes (163) in adjacent ones of the stroke areas are mutually insulated.

4. A display panel according to claim 3, characterized in that the side of the second substrate (12) facing the first liquid crystal layer (13) is further provided with a first signal electrode network (15), the first signal electrode network (15) and the first viewing angle electrode (14) being located in different layers;

the first signal electrode network (15) comprises a first identification pattern electrode network (151), a first non-identification pattern electrode network (152), a first clock pattern electrode network (153), a first identification pattern signal line (154) and a first clock pattern signal line (155), wherein the first identification pattern electrode network (151) corresponds to the identification pattern region (110), the first non-identification pattern electrode network (152) corresponds to the non-identification pattern region (120), and the first clock pattern electrode network (153) corresponds to the clock pattern region (130);

The first identification pattern electrode strip (141) is electrically connected with the first identification pattern electrode net (151), the first clock control electrode strip (143) is electrically connected with the first clock pattern electrode net (153), one end of the first identification pattern signal wire (154) is electrically connected with the first identification pattern electrode net (151), the other end of the first identification pattern signal wire (154) extends to the edge of the second substrate (12), one end of the first clock pattern signal wire (155) is electrically connected with the first clock pattern electrode net (153), and the other end of the first clock pattern signal wire (155) extends to the edge of the second substrate (12);

The first clock pattern electrode networks (153) in adjacent stroke areas are insulated from each other, and each stroke area is correspondingly provided with one first clock pattern signal line (155).

5. The display panel with switchable wide and narrow viewing angles according to claim 4, characterized in that the first viewing angle electrode (14) and the second viewing angle electrode (16) are located in different layers, a second signal electrode net (17) is further disposed on one side of the second substrate (12) facing the first liquid crystal layer (13), and the second signal electrode net (17), the second viewing angle electrode (16), the first signal electrode net (15) and the first viewing angle electrode (14) are sequentially disposed in a direction facing the first liquid crystal layer (13);

The second signal electrode network (17) comprises a second identification pattern electrode network (171), a second non-identification pattern electrode network (172), a second clock pattern electrode network (173), a second identification pattern signal line (174) and a second clock pattern signal line (175), wherein the second identification pattern electrode network (171) corresponds to the identification pattern region (110), the second non-identification pattern electrode network (172) corresponds to the non-identification pattern region (120), and the second clock pattern electrode network (173) corresponds to the clock pattern region (130);

The second identification pattern electrode strip (161) is electrically connected with the second identification pattern electrode net (171), the second clock control electrode strip (163) is electrically connected with the second clock pattern electrode net (173), one end of the second identification pattern signal wire (174) is electrically connected with the second identification pattern electrode net (171), the other end of the second identification pattern signal wire (174) extends to the edge of the second substrate (12), one end of the second clock pattern signal wire (175) is electrically connected with the second clock pattern electrode net (173), and the other end of the second clock pattern signal wire (175) extends to the edge of the second substrate (12);

the second clock pattern electrode networks (173) in adjacent stroke areas are mutually insulated, and each stroke area is correspondingly provided with one second clock pattern signal line (175).

6. The wide-narrow viewing angle switchable display panel according to claim 5, characterized in that the projections of the grid lines in the first signal electrode network (15) and the second signal electrode network (17) on the second substrate (12) are mutually offset.

7. A driving method of a display panel, wherein the driving method is used for driving the display panel of any one of claims 1 to 6, and the driving method comprises:

in a wide viewing angle mode, applying a common electrical signal (Vcom) to the common viewing angle electrode (111), applying a first electrical signal (V1) to both the entire first viewing angle electrode (14) and the entire second viewing angle electrode (16), a pressure difference between the first electrical signal (V1) and the common electrical signal (Vcom) being smaller than a first preset value or larger than a second preset value;

in a narrow viewing angle mode, applying a common electrical signal (Vcom) to the common viewing angle electrode (111), applying a second electrical signal (V2) to both the entire first viewing angle electrode (14) and the entire second viewing angle electrode (16), a pressure difference between the second electrical signal (V2) and the common electrical signal (Vcom) being greater than a third preset value and less than a fourth preset value;

In a logo pattern display mode, applying a common electric signal (Vcom) to the common viewing angle electrode (111), applying a third electric signal (V3) to the first logo pattern electrode bar (141), applying a fourth electric signal (V4) to the second logo pattern electrode bar (161), and a pressure difference between the third electric signal (V3) and the fourth electric signal (V4) is greater than a fifth preset value and less than a sixth preset value;

the display box (20) is in an open state in the wide view angle mode and the narrow view angle mode, and is in a closed state in the pattern display mode, wherein a first preset value < a third preset value < a fourth preset value < a second preset value, and a first preset value < a fifth preset value < a sixth preset value.

8. The driving method of a display panel according to claim 7, wherein the display panel further has a patterned clock pattern region (130), the clock pattern region (130) includes a plurality of stroke regions independent of each other, the first viewing angle electrode (14) further includes a first clock control electrode bar (143), the second viewing angle electrode (16) further includes a second clock control electrode bar (163), the first clock control electrode bar (143) and the second clock control electrode bar (163) each correspond to the clock pattern region (130), and projections on the second substrate (12) are distributed in parallel and alternately with each other, the first clock control electrode bars (143) in adjacent ones of the stroke regions are insulated from each other, and the second clock control electrode bars (163) in adjacent ones of the stroke regions are insulated from each other, the driving method further comprising:

In a clock display mode, applying a common electrical signal (Vcom) to the common viewing angle electrode (111), applying a third electrical signal (V3) to the first clock control electrode bar (143) in the corresponding stroke area, applying a fourth electrical signal (V4) to the second clock control electrode bar (163) in the corresponding stroke area, a pressure difference between the third electrical signal (V3) and the fourth electrical signal (V4) being greater than a fifth preset value and less than a sixth preset value;

And in the clock display mode, the display box (20) is in a closed state, and the identification pattern display mode and the clock display mode can be displayed simultaneously.

9. The driving method of a display panel according to claim 7, wherein the first non-identification pattern electrode (142) includes a plurality of first electrode stripes, the second viewing angle electrode (16) further includes a second non-identification pattern electrode (162) corresponding to the non-identification pattern region (120), the second non-identification pattern electrode (162) includes a plurality of second electrode stripes, and projections of the first electrode stripes and the second electrode stripes on the second substrate (12) are parallel to each other and alternately distributed, the driving method further comprising:

In a specular reflection mode, applying a common electrical signal (Vcom) to the common viewing angle electrode (111), applying a third electrical signal (V3) to the entire first viewing angle electrode (14), applying a fourth electrical signal (V4) to the entire second viewing angle electrode (16), a pressure difference between the third electrical signal (V3) and the fourth electrical signal (V4) being greater than a fifth preset value and less than a sixth preset value;

Wherein, in the specular reflection mode, the display box (20) is in a closed state.

10. A display device comprising the display panel according to any one of claims 1 to 6, which is switchable between wide and narrow viewing angles.