CN107479295B - Display panel, method for manufacturing display panel and display device - Google Patents

Display panel, method for manufacturing display panel and display device Download PDF

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Publication number
CN107479295B
CN107479295B CN201710721413.2A CN201710721413A CN107479295B CN 107479295 B CN107479295 B CN 107479295B CN 201710721413 A CN201710721413 A CN 201710721413A CN 107479295 B CN107479295 B CN 107479295B
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conductor layer
layer
display panel
touch
conductive material
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CN107479295A (en
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林柏全
席克瑞
欧阳珺婷
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

The application discloses electrophoresis display panel includes: a first conductor layer disposed over the substrate, the first conductor layer comprising a first conductive material and a second conductive material; a plurality of touch electrodes arranged in an array are arranged on the first conductor layer, and the touch electrodes are formed by the first conductive material; the scanning signal lines are arranged on the first conductor layer and are made of the second conductive material, and the scanning signal lines are insulated from the touch control electrodes; the electrophoresis particle layer and the common electrode layer are arranged on one side of the electrophoresis particle layer, which is far away from the substrate base plate; wherein: and one side of the substrate, which is far away from the electrophoretic particle layer, is a display surface. The touch electrode formed by the first conductive material and the scanning signal line formed by the second conductive material are arranged on the same conductor layer, so that the number of film layers of the electrophoretic display panel can be reduced, the thickness of the display panel is reduced, and the electrophoretic display panel is light and thin.

Description

Display panel, method for manufacturing display panel and display device
Technical Field
The present invention generally relates to the field of display technologies, and in particular, to a display panel, a method for manufacturing the display panel, and a display device.
Background
The electrophoretic display is a display in which the movement of electrophoretic particles in an electrophoretic film is controlled by an electric field between two electrodes (e.g., a pixel electrode and a common electrode), and the reflection of incident light from the outside is controlled by the position of the moved electrophoretic particles, thereby implementing image display. Due to its unique advantages of extremely low power consumption, reduced paper visibility, and suitability for human reading, the electrophoretic Display technology is attracting people's attention, and especially in the field of static Display (such as labels, books, newspapers, billboards, and nameplates), the electrophoretic Display technology will become an irreplaceable Display technology for LCD (Liquid Crystal Display) and OLED (Organic Light emitting diode).
In the conventional electrophoretic display device, the common electrode is often disposed on a side of the electrophoretic film away from the substrate, and in order to prevent the common electrode from shielding the touch signal of the touch electrode, the touch electrode is generally disposed on an outer side of the electrophoretic display panel, that is, on a side of the common electrode away from the substrate. Therefore, the thickness and cost of the electrophoretic display device are increased, which is not favorable for realizing the lightness and thinness of the electrophoretic display device.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a display panel to solve the technical problems in the prior art.
In a first aspect, an embodiment of the present application provides an electrophoretic display panel, including: a substrate base plate; the first conductor layer is arranged on the substrate and comprises a first conductive material and a second conductive material, wherein the first conductive material and the second conductive material are conductive materials with different materials; the first conductor layer is provided with a plurality of touch electrodes which are arranged in an array mode, and the touch electrodes are insulated from each other and are made of a first conductive material; the scanning signal lines are arranged on the first conductor layer and extend along the first direction, the scanning signal lines are made of a second conductive material, and the scanning signal lines are insulated from the touch control electrodes; a second conductor layer and a third conductor layer which are arranged on the first conductor layer in sequence, wherein the second conductor layer comprises a plurality of data signal lines extending along the second direction, the third conductor layer is provided with a plurality of pixel electrodes, and insulating layers are arranged between the first conductor layer and the second conductor layer and between the second conductor layer and the third conductor layer; the electrophoresis particle layer and the common electrode layer are arranged on one side of the electrophoresis particle layer, which is far away from the substrate base plate; wherein: and one side of the substrate base plate, which is far away from the electrophoretic particle layer, is a display surface.
In a second aspect, an embodiment of the present application provides a method for manufacturing an electrophoretic display panel, where the method includes: providing a substrate base plate; depositing a first conductive material on the substrate, and etching the first conductive material to form a plurality of touch electrodes, wherein the touch electrodes are insulated from each other; depositing a second conductive material on the first conductive material, etching the second conductive material, and forming a plurality of scanning signal lines extending along the first direction between the touch control electrodes, wherein the scanning signal lines and the touch control electrodes are positioned on the same conductor layer and are insulated from each other; sequentially depositing a first insulating layer and a second conductor layer on the first conductor layer, and etching the second conductor layer to form a plurality of data signal lines extending along a second direction, wherein the first direction is intersected with the second direction; depositing a second insulating layer and a third conductor layer on the second conductor layer, and etching the third conductor layer to form a pixel electrode; and sequentially forming an electrophoretic particle layer and a common electrode layer on the third conductor layer.
In a third aspect, embodiments of the present application provide an electrophoretic display device, which includes an electrophoretic display panel as described above.
According to the scheme provided by the embodiment of the application, the touch electrode formed by the first conductive material and the scanning signal line formed by the second conductive material are arranged on the same conductor layer, namely the first conductor layer, so that the number of film layers of the electrophoretic display panel can be reduced, the thickness of the display panel is reduced, and the light and thin design of the electrophoretic display panel is facilitated; meanwhile, one side of the substrate base plate, which is far away from the electrophoretic particle layer, is set as a display surface, so that when the opposite side of the electrophoretic display panel and the substrate base plate is used for displaying touch, a common electrode arranged on the opposite surface shields a touch signal arranged on one side of the substrate base plate, and the touch effect of the electrophoretic display panel is improved.
Drawings
FIG. 1 illustrates a top view of one embodiment of an electrophoretic display panel provided herein;
fig. 2 shows a schematic partial enlarged view of the electrophoretic display panel shown in fig. 1;
FIG. 3 shows a cross-sectional view along aa' of the electrophoretic display panel as shown in FIG. 2;
FIG. 4 illustrates a top view of yet another embodiment of an electrophoretic display panel as provided herein;
FIG. 5 illustrates a top view of an alternative implementation of an electrophoretic display panel provided herein;
FIG. 6 illustrates a top view of yet another embodiment of an electrophoretic display panel provided herein;
FIG. 7 shows a schematic diagram of a structure of yet another embodiment of an electrophoretic display panel provided herein;
FIG. 8 is a flow chart illustrating the fabrication of an electrophoretic display panel provided herein;
fig. 9 shows a schematic structural diagram of a display device provided in the present application.
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, which shows a top view of an electrophoretic display panel provided in an embodiment of the present application, fig. 2 shows a partially enlarged schematic view of the electrophoretic display panel shown in fig. 1, and fig. 3 shows a cross-sectional view along aa' of the electrophoretic display panel shown in fig. 2. The embodiments shown in the present application will be specifically explained with reference to fig. 1, fig. 2 and fig. 3.
In the embodiments shown in fig. 1, 2, and 3, the electrophoretic display panel 100 includes a substrate SUB that may provide support and protection to the display panel 100. The substrate SUB may be a rigid substrate or a flexible substrate, and the substrate SUB is generally made of a light-transmitting material, such as glass, quartz, an organic polymer, or other suitable materials. A first conductor layer is disposed on the substrate SUB, and the first conductor layer includes a first conductive material and a second conductive material.
The first conductive material may be a semiconductor transparent conductive material, such as ITO (Indium Tin Oxides), IZO (Indium Zinc Oxide), and the like. The second conductive material may be a metal conductive material, an alloy, a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, or the like.
The first conductor layer is provided with a plurality of touch electrodes SX, the touch electrodes SX are arranged in an array, and the touch electrodes SX are insulated from each other. In this embodiment, the touch electrode SX is formed of the first conductive material. The touch electrode SX is a self-contained touch electrode. During touch control, each touch electrode SX is used for receiving a touch detection signal and providing a touch sensing signal.
The first conductor layer is further provided with a plurality of scanning signal lines SC, the scanning signal lines SC extend along the first direction X, and the scanning signal lines SC are made of a second conductive material. In this embodiment, the scan signal line SC and the touch electrode SX are insulated from each other.
The electrophoretic display panel 100 further includes a second conductive layer and a third conductive layer. The second conductor layer is provided with a plurality of data signal lines DA extending along the second direction Y. The first direction X intersects the second direction Y. The material forming the data signal line DA may be a metal conductive material, an alloy, a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, or the like. A plurality of pixel electrodes PE are disposed on the third conductor layer, and the pixel electrodes PE may be formed of a transparent conductive material. The transparent conductive material may be, for example, indium tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or the like. A first insulating layer IL1 for isolating the first conductor layer from the second conductor layer is disposed between the first conductor layer and the second conductor layer. A second insulating layer IL2 for isolating the second conductor layer from the third conductor layer is disposed between the second conductor layer and the third conductor layer. The first insulating layer IL1 and the second insulating layer IL2 may be made of inorganic materials, such as silicon oxide, silicon nitride, and silicon oxynitride, and may also be made of organic materials or a combination of organic and inorganic materials.
In this embodiment, the electrophoretic display panel 100 further includes a pixel array, and the pixel array includes a plurality of pixel units 11 arranged in an array. As shown in fig. 2, each pixel unit 11 includes at least one thin film transistor Tr and one pixel electrode PE. Meanwhile, the pixel unit 11 is electrically connected to at least one scan signal line SC and at least one data signal line DA. The thin film transistor Tr includes a gate electrode GE, a source electrode SE, and a drain electrode DE. The scanning signal line SC is electrically connected to the gate electrode GE of the thin film transistor Tr. Usually, the gate electrode GE of the thin film transistor Tr and the scanning signal line SC are disposed on the same conductor layer, i.e., the first conductor layer in the present embodiment. The data signal line DA is electrically connected to the source electrode SE of the thin film transistor Tr, and usually, the source electrode SE and the drain electrode DE of the thin film transistor Tr are provided in the same conductor layer, i.e., the second conductor layer in the present embodiment, as the data signal line DA. The drain electrode DE of the thin film transistor Tr is electrically connected to the pixel electrode PE located in the third conductor layer through a via hole provided in the second insulating layer IL 2.
As shown in fig. 3, the gate electrode GE of the thin film transistor Tr is closer to the substrate SUB than the source electrode SE and the drain electrode DE of the thin film transistor Tr, that is, the electrophoretic display panel 100 shown in the present application has a bottom gate thin film transistor. However, the present application is not limited thereto, and in other embodiments, the gate of the thin film transistor is further away from the substrate than the source and the drain of the thin film transistor, that is, the top gate thin film transistor, according to the requirement of the application scenario.
In this embodiment, the touch electrode SX and the scan signal line SC are disposed on the same conductive layer, and each row of pixel units 11 is electrically connected to at least one scan signal line SC, so that the touch electrode SX and the scan signal line SC need to be isolated from each other to avoid short circuit. In this way, the number of rows of the touch electrode SX is the same as the number of rows of the pixel unit 11, and each touch electrode SX may cover multiple rows of the pixel unit 11. For example, in the embodiment shown in fig. 1 and fig. 2, each touch electrode SX covers three rows of pixel units 11. By covering the multiple rows of pixel units 11 with one touch electrode SX, the thickness of the electrophoretic display panel 100 may be reduced, and the process complexity of the electrophoretic display panel 100 may be reduced.
In this embodiment, the electrophoretic display panel 100 further includes a common electrode layer, the common electrode layer is provided with a plurality of common electrodes CE, and the common electrode layer CE is disposed on one side of the electrophoretic particle layer 17 away from the substrate SUB. That is, the electrophoretic particle layer 17 is disposed between the pixel electrode PE and the common electrode CE. Since the common electrode CE and the pixel electrode PE are disposed on both sides of the electrophoretic particle layer 17, when external light is incident from the common electrode CE side, the incident light is totally reflected by the electrophoretic particles, and thus, human eyes need to read a display picture from a side close to the common electrode CE. However, in the electrophoretic display panel 100, the touch electrode is disposed on a side of the electrophoretic particle layer 17 away from the common electrode CE, so that when human eyes touch the screen from the side of the common electrode CE to read the image, the common electrode CE at least partially shields the signal of the touch electrode SX disposed on the other side of the electrophoretic particle layer 17, thereby affecting the touch function.
In this embodiment, external light is set to enter from the side of the pixel electrode PE, and human eyes perform screen touch and image reading from the side of the electrophoretic particle layer 17 where the pixel electrode PE is set, that is, from the side of the substrate SUB away from the electrophoretic particle layer 17, because the touch electrode SX is directly disposed on the substrate SUB, when image reading and touch display are performed on the substrate SUB side, because there is no shielding of the common electrode CE or other electrode signals, the touch electrode SX can respond quickly when detecting a touch signal, and the touch sensitivity of the electrophoretic display panel 100 is improved.
In this embodiment, as shown in fig. 3, the electrophoretic display panel 100 further includes an electrophoretic particle layer 17, and the electrophoretic particle layer 17 includes a plurality of electrophoretic particles. When the electrophoretic display panel 100 displays a black-and-white picture, the electrophoretic particlesMay comprise black electrophoretic particles MbAnd white electrophoretic particles Mw(ii) a When the electrophoretic display panel 100 displays a color screen, the electrophoretic particles may include electrophoretic particles of a plurality of colors, such as red electrophoretic particles, blue electrophoretic particles, green electrophoretic particles, and the like.
The electrophoretic particles may be moved by an electric field, that is, the electrophoretic particles may be moved according to the magnitude and direction of the electric field between the common electrode CE and the pixel electrode PE, for example, when a ground voltage is applied to the common electrode CE and a data voltage of +15V is applied to the pixel electrode PE, the white electrophoretic particles M having positive chargeswNegatively charged black electrophoretic particles M movable towards the common electrode CEbCan be moved toward the pixel electrode PE such that, when external light is incident from the pixel electrode PE side, the incident light is negatively charged by the black electrophoretic particles MwAnd is reflected so that the pixel P can be observed to appear black.
In the embodiment, the number of the film layers of the electrophoretic display panel 100 can be reduced by arranging the touch electrode SX formed by the first conductive material and the scanning signal line SC formed by the second conductive material on the same conductive layer, that is, the first conductive layer, so that the thickness of the display panel is reduced, which is beneficial to realizing the light and thin design of the electrophoretic display panel; meanwhile, one side of the substrate SUB, which is far away from the electrophoretic particle layer, is set as a display surface, so that when the electrophoretic display panel is touched by display on the side provided with the common electrode CE, the common electrode CE shields a touch signal received or sent by the touch electrode SX arranged on one side of the substrate SUB, and the touch effect of the electrophoretic display panel is improved.
Please refer to fig. 4, which is a top view of another electrophoretic display panel provided in the present application.
In fig. 4, the electrophoretic display panel 400 includes a substrate SUB, a touch electrode SX, a scan signal line SC, a data signal line DA, a pixel unit 41, an electrophoretic particle layer, and a common electrode, where the touch electrode SX and the scan signal line SC are disposed in the same conductive layer. The electrophoretic particle layer and the common electrode are shown, and the specific structure and arrangement thereof are shown in fig. 1 to 3, which are not described herein again.
Unlike the embodiment shown in fig. 1, in the present embodiment, the electrophoretic display panel 400 further includes a plurality of touch signal transmission lines, and each touch electrode is electrically connected to at least one touch signal transmission line. The touch electrode can be electrically connected with one touch signal transmission line and can be electrically connected with two touch signal transmission lines. Fig. 4 shows a case where the touch electrode SX is electrically connected to two touch signal transmission lines SW. The present invention is not limited to this, and may be set according to the needs of the application scenario.
The electrophoretic display panel 400 includes a display area AA and a bezel area located around the display area. The peripheral frame region may include an upper frame region and a lower frame region, wherein the upper frame region, the display region AA, and the lower frame region are sequentially arranged along the second direction Y. The first integrated circuit 42 is disposed in the upper bezel region or the lower bezel region, and in the panel shown in fig. 4, the first integrated circuit 42 is disposed in the lower bezel region of the electrophoretic display panel 400. The first integrated circuit 42 is provided with a plurality of output ends, and the data signal line DA and the touch signal transmission line SW are electrically connected to the output ends of the first integrated circuit 42. During the display period, the first integrated circuit 42 time-divisionally provides a data voltage signal to the thin film transistor located in the display area AA through each data signal line DA; during touch, the first integrated circuit 42 provides a touch driving signal to the touch electrodes through the touch signal transmission lines SW and receives a touch sensing signal transmitted by each touch electrode. Alternatively, the touch signal transmission line SW may be disposed on the second conductive layer, i.e., on the same layer as the data signal line DA. Since the data signal line DA extends along the second direction Y, the touch signal transmission line SW may also extend along the second direction Y. Here, the touch signal transmission line SW and the data signal line DA are insulated from each other. In order to simplify the manufacturing process, the touch signal transmission lines SW may be formed of the same conductive material as the data signal lines DA by etching the second insulating layer to form the plurality of data signal lines DA and the plurality of touch signal transmission lines SW. A plurality of through holes PLN1 are formed in the first insulating layer between the first conductive layer and the second conductive layer, and each touch electrode SX is electrically connected to each touch signal transmission line through a through hole PLN 1. The touch signal transmission line SW is arranged on the second conductor layer, and the conductor layer does not need to be arranged independently to form the touch signal transmission line, so that the number of film layers in the electrophoretic display panel is reduced, and the manufacturing process is simplified.
Optionally, the electrophoretic display panel 400 is further provided with a common signal line COM, the common signal line COM is usually disposed on the first conductor layer, that is, disposed on the same layer as the scanning signal line and the touch electrode SX, and at this time, the common signal line COM extends along the first direction X, as shown in fig. 5. Here, the common signal line COM is connected in contact with the touch electrode SX. A plurality of through holes PLN2 are formed in the first insulating layer between the first conductor layer and the second conductor layer, and the common signal line COM located in the first conductor layer is electrically connected to each touch signal transmission line SW through the through hole PLN 2. That is, the touch electrode SX is electrically connected to the touch signal transmission line SW located in the second conductor layer through the common signal line COM. During the display period, a storage capacitor is formed between the touch electrode SX in contact connection with the common signal line COM and the pixel electrode to store a data voltage signal provided by the data voltage signal line DA; during touch control, the common signal line COM is multiplexed as a touch signal transmission line for transmitting a touch signal. The common signal line COM may be made of the same conductive material as the scan signal line. The common signal line COM is arranged on the first conductor layer, and meanwhile, during display, the touch electrode is reused as one polar plate of the storage capacitor for capacitor storage, so that an independent membrane layer is not required to be arranged to form one polar plate of the storage capacitor, the number of membrane layers of the electrophoretic display panel is further reduced, and the manufacturing process is further simplified.
As can be seen from fig. 4 and 5, the through hole may be directly disposed on the touch electrode SX, and the touch signal transmission line SW located on the second conductor layer is electrically connected to the touch electrode SX through the through hole; or on the common signal line COM in contact with the touch electrode SX, the touch signal transmission line SW on the second conductor layer may be electrically connected to the common signal line COM through the through hole. Therefore, when the layout of the electrophoretic display panel is designed, the positions of the through holes can be flexibly set according to the actual wiring requirement, and the flexibility of the layout design is improved.
Please refer to fig. 6, which shows a top view of another electrophoretic display panel provided in the present application.
As shown in fig. 6, the electrophoretic display panel 600 includes a substrate SUB, a touch electrode SX, a scan signal line SC, a data signal line DA, a pixel unit 61, a common signal line COM, an electrophoretic particle layer, and a common electrode, where the touch electrode SX and the scan signal line SC are disposed in the same conductive layer. The electrophoretic particle layer and the common electrode are shown, and the specific structure and arrangement thereof are shown in fig. 1 to 3, which are not described herein again.
In this embodiment, the common signal line COM is usually disposed on the first conductive layer, that is, disposed on the same layer as the scanning signal line and the touch electrode SX, and at this time, the common signal line COM extends along the first direction X, and the common signal line COM is in contact connection with the touch electrode SX. During the display period, a storage capacitor is formed between the touch electrode SX in contact connection with the common signal line COM and the pixel electrode to store a data voltage signal provided by the data voltage signal line DA; during touch control, the common signal line COM is multiplexed as a touch signal transmission line for transmitting a touch signal.
In this embodiment, the electrophoretic display panel 600 includes a display area AA and a non-display area located around the display area AA. The left frame area, the display area AA and the right frame area are sequentially arranged along a first direction X; the upper frame area, the display area AA, and the right frame area are sequentially arranged along the second direction Y. Unlike the example shown in fig. 4, the electrophoretic display panel 600 includes two integrated circuits, i.e., the first integrated circuit 62 and the second integrated circuit 63. The first integrated circuit 62 is disposed in the upper frame region or the lower frame region, and the second integrated circuit 63 is disposed in the left frame region or the right frame region. In the electrophoretic display panel 600 as shown in fig. 6, a case where the first integrated circuit 62 is disposed in the lower frame region and the second integrated circuit 63 is disposed in the left frame region is exemplarily shown. The first integrated circuit 62 is electrically connected to the data signal lines DA, and during a display period, the first integrated circuit 62 supplies a data voltage signal to the pixel electrodes electrically connected to the respective data signal lines DA through the data signal lines DA. The second integrated circuit 63 is electrically connected to the common signal line COM. During touch control, the second integrated circuit 63 provides a touch driving signal to the touch electrode SX through the common signal line COM, and receives a touch sensing signal transmitted by the touch electrode SX through the common signal line COM.
As can be seen from fig. 6, in the electrophoretic display panel in which the second integrated circuits 63 are disposed in some left frame regions or right frame regions, there is no need to dispose a touch signal transmission signal line, and there is no need to electrically connect the touch electrode SX and the touch signal line through a through hole. Therefore, the manufacturing process of the electrophoretic display panel can be simplified, and the manufacturing yield of the electrophoretic display panel can be improved. Meanwhile, one side of the substrate base plate, which is far away from the electrophoretic particle layer, is set as a display surface, so that when the opposite side of the electrophoretic display panel and the substrate base plate is used for displaying touch, a common electrode arranged on the opposite surface shields a touch signal arranged on one side of the substrate base plate, and the touch effect of the electrophoretic display panel is improved.
With continued reference to fig. 7, a schematic diagram of a structure of yet another electrophoretic display panel provided by the present application is shown.
As shown in fig. 7, the electrophoretic display panel 700 includes a substrate SUB, and a first conductive layer disposed on the substrate SUB, wherein the first conductive layer includes a touch electrode SX, a scan signal line SC, and a gate electrode of a thin film transistor Tr. A second conductor layer including a data signal line (not shown), a source electrode SE and a drain electrode DE of the thin film transistor Tr, a third conductor layer provided with a pixel electrode PE, an electrophoretic particle layer 17, the electrophoretic particle layer 17 including black electrophoretic particles MbAnd white electrophoretic particles MwThe common electrode CE, the insulating layer IL1 disposed between the first conductive layer and the second conductive layer, and the second insulating layer IL2 disposed between the second conductive layer and the third conductive layer.
Unlike the embodiment shown in fig. 3, in the present embodiment, the electrophoretic display panel 700 further includes an anti-reflection layer RF, and a protective film PL.
The anti-reflection layer RF is provided between the substrate SUB and the first conductor layer. The material of the anti-reflection layer RF is a low-reflection and high-absorption material, for example, the material may be a resin light-shielding material, the material may be a light-absorption coating formed by a metal oxide and a metal, the metal oxide may be nickel oxide, chromium oxide, or the like, and the metal may be tungsten, titanium, iron, or the like. The anti-reflection layer RF is used to shield each metal line in the electrophoretic display panel 700, for example, a scan signal line and a common voltage signal line disposed in the first conductive layer, a data signal line disposed in the second conductive layer, and the like. Because the data signal lines and the scanning signal lines are arranged in a crossed manner, correspondingly, the pattern formed by the anti-reflection layer can be a plurality of strip-shaped patterns arranged in a crossed manner along the first direction and the second direction. By providing the anti-reflection layer RF on the electrophoretic display panel 700, external light can be absorbed and emitted light of adjacent patterns can be scattered, thereby improving the contrast of a display screen.
The protective film PL is provided on the side of the electrophoretic particle layer 17 away from the base substrate SUB. The common electrode COM is disposed on the side of the protective film PL close to the electrophoretic particle layer 17. In the process of manufacturing the electrophoretic display panel 700, the common electrode COM is generally formed in close contact with the protective film PL, and after the common electrode COM and the protective film PL are formed, they are disposed on the electrophoretic particle layer 17. By providing the protection film PL, the protection of the electrophoretic display panel 700 against other film structures can be improved, and the capability of the electrophoretic display panel 700 against external pressure can be improved.
Please continue to refer to fig. 8, which shows a flowchart 800 of an electrophoretic display panel provided in the present application.
Step 801 provides a substrate.
Step 802, depositing a first conductive material on the substrate base plate, and etching the first conductive material to form a plurality of touch electrodes.
In this embodiment, a first conductive material may be deposited on the substrate provided in step 801 and a photoresist may be deposited to form a lithographic pattern. And then, etching the part covered by the photoresist by using a mask plate, and developing to form a plurality of touch electrodes. The touch electrodes are insulated from each other.
In step 803, a second conductive material is deposited on the first conductive material, and a plurality of scan signal lines extending along the first direction are formed between the touch electrodes by the second conductive material.
In this embodiment, after the touch electrode is formed in step 802, a second conductive material may be deposited on the first conductive material, and a photoresist may be deposited to form a photoresist pattern. The second conductive material covered by the photoresist pattern is etched and developed to form a plurality of scanning signal lines extending along the first direction, the second scanning signal lines are located between the touch electrodes and formed on the substrate exposed after the first conductive material is etched in step 802. Therefore, the touch electrode and the scanning signal line are formed on the substrate and are formed on the uniform conductor layer.
Here, the first conductive material may be indium tin oxide, and the second conductive material may be a metal. Because the etching speed of the metal is higher than that of the indium tin oxide, the first conductive material is the indium tin oxide, and the second conductive material is the metal, so that the touch electrode formed by the first conductive material can be prevented from being etched when the second conductive material is etched.
And 804, sequentially depositing a first insulating layer and a second conductor layer on the first conductor layer, and etching the second conductor layer to form a plurality of data lines extending along a second direction, wherein the first direction is intersected with the second direction.
In this embodiment, a first insulating layer is deposited on the first conductor forming the touch electrode and the scan signal line, and the material of the first insulating layer may be silicon oxide, silicon nitride, silicon oxynitride, or the like. A second conductive layer is formed on the first insulating layer, and a photoresist is deposited to form a photoresist pattern. And etching the second conductor layer covered by the photoresist pattern, and developing to form a data line extending along a second direction, wherein the second direction is intersected with the first direction.
At step 805, a second insulating layer and a third conductive layer are deposited on the second conductive layer, and the third conductive layer may be used to form a pixel electrode.
In this embodiment, a second insulating layer may be deposited on the second conductor layer, and the material of the second insulating layer may be silicon oxide or the like. Depositing a third conductor layer and photoresist on the second conductor layer in sequence; and developing the third conductor layer covered by the mask photoresist to form a pixel electrode.
Step 806, depositing an electrophoretic particle layer and a common electrode layer on the third conductor layer in sequence.
By using the manufacturing method of the electrophoretic display panel as shown in fig. 8, the number of the film layers of the electrophoretic display panel can be reduced by disposing the touch electrode formed by the first conductive material and the scanning signal line formed by the second conductive material in the same conductive layer, i.e., the first conductive layer, so that the thickness of the display panel is reduced, which is beneficial to realizing the light and thin design of the electrophoretic display panel.
Fig. 1 to fig. 3 are schematic diagrams showing specific structures of an electrophoretic display panel manufactured by the method for manufacturing an electrophoretic display panel shown in fig. 8.
In some optional implementations of this embodiment, the method of manufacturing an electrophoretic display panel further includes: etching the second conductor layer to form a plurality of touch signal transmission lines extending along a second direction; and etching the first insulating layer to form a plurality of through holes so that each touch electrode is electrically connected with at least one touch signal transmission line through the through hole.
In some optional implementations of this embodiment, the method of manufacturing an electrophoretic display panel further includes: and etching the second conductive material to form a plurality of common signal lines extending along the first direction, wherein each touch electrode is electrically connected with at least one common signal line, and the common signal lines are insulated from the scanning signal lines.
In some optional implementations of this embodiment, the method of manufacturing an electrophoretic display panel further includes: and forming an anti-reflection layer between the substrate and the touch electrode layer.
In some optional implementations of this embodiment, the method of manufacturing an electrophoretic display panel further includes: depositing a flexible substrate material between the substrate base plate and the anti-reflection layer to form a flexible base plate; after the electrophoretic particle layer and the common electrode layer are sequentially formed on the third conductor layer, the flexible substrate is separated from the base substrate.
In the manufacturing method of the electrophoretic display panel shown in this embodiment, the touch electrode SX formed by the first conductive material and the scanning signal line SC formed by the second conductive material are disposed on the same conductive layer, that is, the first conductive layer, so that the number of film layers of the electrophoretic display panel 100 can be reduced, the thickness of the display panel is reduced, and the implementation of the light and thin design of the electrophoretic display panel is facilitated; meanwhile, one side of the substrate SUB, which is far away from the electrophoretic particle layer, is set as a display surface, so that when the electrophoretic display panel is touched by display on the side provided with the common electrode CE, the common electrode CE shields a touch signal received or sent by the touch electrode SX arranged on one side of the substrate SUB, and the touch effect of the electrophoretic display panel is improved.
The present application also discloses a display device, as shown in fig. 9. The display device 900 may include an electrophoretic display panel as above, among others. It will be appreciated by a person skilled in the art that the display device may comprise some other known structure than an electrophoretic display panel as described above. Such well-known structures will not be further described in order not to obscure the focus of the present application.
The display device of the present application may be any device including the above electrophoretic display panel, including but not limited to an electronic paper 900, an electronic book, a billboard, a display applied to a smart wearable device, a display applied to a vehicle such as an automobile, and the like, as shown in fig. 9. As long as the display device includes the structure of the electrophoretic display panel disclosed in the present application, it is considered to fall within the scope of protection of the present application.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (13)

1. An electrophoretic display panel, comprising:
a substrate base plate;
a first conductor layer disposed on the substrate, the first conductor layer including a first conductive material and a second conductive material, wherein the first conductive material and the second conductive material are conductive materials of different materials;
the first conductor layer is provided with a plurality of touch electrodes arranged in an array, and the touch electrodes are insulated from each other, wherein the touch electrodes are made of the first conductive material;
a plurality of scanning signal lines, each of which is disposed on the first conductor layer and extends along a first direction, wherein the scanning signal lines are formed of the second conductive material, and each of the scanning signal lines is insulated from each of the touch electrodes;
a second conductor layer and a third conductor layer which are sequentially arranged on the first conductor layer, wherein the second conductor layer comprises a plurality of data signal lines extending along a second direction, the third conductor layer is provided with a plurality of pixel electrodes, and insulating layers are arranged between the first conductor layer and the second conductor layer and between the second conductor layer and the third conductor layer;
the electrophoresis particle layer and the common electrode layer are arranged on one side, far away from the substrate, of the electrophoresis particle layer; wherein:
and one side of the substrate base plate, which is far away from the electrophoretic particle layer, is a display surface.
2. The electrophoretic display panel according to claim 1, wherein the second conductor layer further includes a plurality of touch signal transmission lines extending along the second direction, a plurality of through holes are formed in the insulating layer between the first conductor layer and the second conductor layer, and each of the touch electrodes is electrically connected to at least one of the touch signal transmission lines through the through hole.
3. The electrophoretic display panel according to claim 2, wherein the electrophoretic display panel comprises an upper frame area, a display area and a lower frame area sequentially arranged along the second direction, and the touch electrode is located in the display area;
and the upper frame area or the lower frame area is provided with a first integrated circuit, and the data signal line and the touch signal transmission line are electrically connected with the first integrated circuit.
4. The electrophoretic display panel of claim 1, further comprising a plurality of common signal lines, wherein each common signal line is disposed on the first conductive layer and extends along the first direction, wherein each touch electrode is electrically connected to at least one common signal line, and the common signal lines are insulated from the scan signal lines.
5. The electrophoretic display panel according to claim 4, wherein the electrophoretic display panel comprises a left frame area, a display area and a right frame area sequentially arranged along the first direction, and the touch electrode is located in the display area;
and a second integrated circuit is arranged in the left frame area or the right frame area, and the scanning signal line and the common signal line are electrically connected with the second integrated circuit.
6. The electrophoretic display panel according to claim 1, further comprising an anti-reflection layer disposed between the base substrate and the touch electrode layer.
7. The electrophoretic display panel according to claim 1, further comprising a protective film, wherein the common electrode layer is disposed on a side of the protective film close to the electrophoretic particle layer.
8. A method for manufacturing an electrophoretic display panel, the method comprising:
providing a substrate base plate;
depositing a first conductive material on the substrate base plate, and etching the first conductive material to form a plurality of touch electrodes, wherein the touch electrodes are insulated from each other;
depositing a second conductive material on the first conductive material, etching the second conductive material, and forming a plurality of scanning signal lines extending along a first direction between the touch electrodes, wherein the scanning signal lines and the touch electrodes are located on the same conductor layer and are insulated from each other;
sequentially depositing a first insulating layer and a second conductor layer on the first conductor layer, and etching the second conductor layer to form a plurality of data signal lines extending along a second direction, wherein the first direction is intersected with the second direction;
depositing a second insulating layer and a third conductor layer on the second conductor layer, and etching the third conductor layer to form a pixel electrode;
and sequentially forming an electrophoretic particle layer and a common electrode layer on the third conductor layer.
9. The method of manufacturing according to claim 8, further comprising:
etching the second conductor layer to form a plurality of touch signal transmission lines extending along the second direction;
and etching the first insulating layer to form a plurality of through holes so that each touch electrode is electrically connected with at least one touch signal transmission line through the through hole.
10. The method of manufacturing according to claim 8, further comprising:
and etching the second conductive material to form a plurality of common signal lines extending along the first direction, wherein each touch electrode is electrically connected with at least one common signal line, and the common signal lines are insulated from the scanning signal lines.
11. The method of manufacturing according to claim 8, further comprising:
and forming an anti-reflection layer between the substrate base plate and the touch electrode layer.
12. The method of manufacturing of claim 11, wherein the base substrate is a rigid substrate, the method further comprising:
depositing a flexible substrate material between the substrate base plate and the anti-reflection layer to form a flexible base plate;
after sequentially forming an electrophoretic particle layer and a common electrode layer on the third conductor layer,
separating the flexible substrate from the substrate.
13. An electrophoretic display device, characterized in that it comprises an electrophoretic display panel as claimed in any one of claims 1 to 7.
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