CN104880840A - Touch control display substrate, VT test method and liquid crystal display panel - Google Patents
Touch control display substrate, VT test method and liquid crystal display panel Download PDFInfo
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- CN104880840A CN104880840A CN201510232210.8A CN201510232210A CN104880840A CN 104880840 A CN104880840 A CN 104880840A CN 201510232210 A CN201510232210 A CN 201510232210A CN 104880840 A CN104880840 A CN 104880840A
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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
- G02F1/13—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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
- G02F1/13—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
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- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Theoretical Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a touch control display substrate, a VT test method and a liquid crystal display panel. The touch control display substrate comprises a substrate comprising a display area and a non display area, a plurality of common electrode pieces which are arranged on the display area in an array and also used as touch control electrodes, a plurality of wires which are connected with the common electrode piece one by one, at least two VT test electrodes which are arranged on the non display area and used for outputting test voltages during a VT test, wherein the test voltages output from the VT test electrodes are different. When the VT test is carried out, wires of any two adjacent common electrode pieces are respectively electrically connected with two different VT test electrodes. When the VT test is carried out, different common voltages are applied on two common electrode pieces, if electric connection between the two common electrode pieces is normal, flicker with different frequencies will display on a display area corresponding to the common electrodes frame, detection can be rapidly and accurately carried out.
Description
Technical field
The present invention relates to technical field of touch-control display, particularly relate to a kind of touch display substrate, VT method of testing and display panels.
Background technology
Current, in display panel field, display panel with touch controllable function has more and more become main flow display product, there is the integration mode of various display panel and contact panel, be of a great variety, such as embedded (incell), the outer formula (oncell) of box and external hanging type.On the other hand, if classify from principle of work, the display panel of band touch controllable function can be roughly divided into condenser type, resistance-type, infrared type etc. again.Wherein, capacitance type touch control display panel mainly comprises self-capacitance and mutual capacitance type two type.The all each have their own Pros and Cons of touch-control display panel of every type.The electrode being used for touch-control is arranged on the inside of display panel outermost layer substrate by touch-control display panel based on self-capacitance usually, and thus, the touch-control display panel integral thickness of self-capacitance is less, more frivolous.
Summary of the invention
The invention provides a kind of touch display substrate, VT method of testing and display panels, it is by arranging at least two VT test electrodes, each VT test electrode exports different test voltages, during VT test, different from two the respectively VT test electrode of the cabling that any two adjacent public electrode blocks are corresponding is connected; Be equivalent to be the different common electric voltage of the applying of two public electrode blocks, if the electrical connection of two public electrodes is normal when VT tests, the viewing area of its correspondence will the different film flicker of the frequency of occurrences, realizes quick and precisely detecting.
For realizing above-mentioned design, the present invention by the following technical solutions:
Adopt a kind of touch display substrate on the one hand, comprising:
One substrate, comprises a viewing area and non-display area;
Multiple public electrode block, is arranged at described viewing area with array way, and described public electrode block is multiplexed with touch control electrode;
Many cablings, each cabling is electrically connected with a public electrode block respectively;
At least two VT test electrodes, are arranged at described non-display area, export test voltage when testing for VT, and the test voltage that each VT test electrode exports is different;
During VT test, different from two the respectively VT test electrode of the cabling that any two adjacent common electrode blocks are corresponding is electrically connected.
A kind of VT method of testing of above-mentioned touch display substrate on the other hand,
Comprise:
Walk public electrode block described in alignment described in each VT test electrode passes through and export different test voltages, and any two adjacent public electrode blocks input different test voltages.
Finally adopt a kind of display panels, comprise color film, also comprise above-mentioned touch display substrate, and integrated circuit.
Beneficial effect of the present invention is: by arranging at least two VT test electrodes, each VT test electrode exports different test voltages, and during VT test, different from two the respectively VT test electrode of the cabling that any two adjacent public electrode blocks are corresponding is connected; Be equivalent to be the different common electric voltage of the applying of two public electrode blocks, if the electrical connection of two public electrodes is normal when VT tests, the viewing area of its correspondence will the different film flicker of the frequency of occurrences, realizes quick and precisely detecting.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing the embodiment of the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the content of the embodiment of the present invention and these accompanying drawings.
Fig. 1 is the schematic layout pattern of public electrode block and cabling in prior art.
The input schematic diagram of the test voltage of public electrode block when Fig. 2 is VT test in prior art.
Fig. 3 is the distribution schematic diagram of the public electrode block of a kind of touch display substrate provided in the specific embodiment of the invention.
Fig. 4 is the input schematic diagram of the test voltage of public electrode block in Fig. 3.
Fig. 5 is another distribution schematic diagram of the public electrode block of a kind of touch display substrate provided in the specific embodiment of the invention.
Fig. 6 is the input schematic diagram of the test voltage of public electrode block in Fig. 5.
Fig. 7 is the method flow diagram of a kind of VT method of testing provided in the specific embodiment of the invention.
Fig. 8 is the structural drawing of the embodiment of a kind of display panels provided in the specific embodiment of the invention.
Embodiment
The technical matters solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, be described in further detail below in conjunction with the technical scheme of accompanying drawing to the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 3, it is the one input schematic diagram of the test voltage of a kind of touch display substrate provided in the specific embodiment of the invention.As shown in the figure, this touch display substrate, comprising:
One substrate 1, comprises a viewing area 11 and non-display area 16;
Multiple public electrode block 12, is arranged at viewing area 11 with array way, and public electrode block 12 is multiplexed with touch control electrode;
Many cablings 13, each cabling 13 is electrically connected with a public electrode block 12 respectively;
At least two VT test electrodes, are arranged at non-display area, export test voltage when testing for VT, and the test voltage that each VT test electrode exports is different;
During VT test, the VT test electrode that the cabling 13 of any two adjacent common electrode block 12 correspondences is different from two is respectively electrically connected.
In the touch display substrate that existing embedded (incell) designs, each public electrode block 12 is multiplexed with touch control electrode, as shown in Figure 1, in the testing process of touch control operation, touch-control IC15 exports touch-control drive singal by cabling 13 to touch control electrode, then obtain the situation of change of electriferous state in touch control electrode from cabling 13, thus calculate the position of touch-control generation.Such as, but in embedded design, touch control electrode is also public electrode block 12, and the various conductor in Fig. 1 in public electrode block 12 and the intersection of wire only have 2 ~ 4 μm, and the juxtaposition that also there is a large amount of wire and conductor is easily short-circuited simultaneously; And for touch display substrate, wherein a place connects disconnection and means that whole touch display substrate is scrapped, so need to carry out VT test accurately, confirm whether circuit connects errorless.Test again if other elements are connected after making finished product or semi-manufacture, cannot do over again during discovery circuit fault, and result in greater loss.
In the prior art, as shown in Figure 2, all public electrode blocks 12 are accessed identical test voltage by VT test, if open circuit occurs public electrode block 12, then the region of this public electrode block 12 correspondence cannot show, and open circuit fault can accurately judge.But because the test voltage of access is identical, as long as mean that access test voltage can occur identical flicker in the region of correspondence, no matter whether obtain test voltage by correct channel.
In the array that the public electrode block 12 of qualified touch display substrate is formed, if be that two public electrode blocks 12 apply different test voltages, the viewing area 11 of two public electrode block 12 correspondences will there will be the flicker of different frequency.That is, when carrying out VT test, only needing to ensure that on each row and each row, any two adjacent public electrode blocks 12 access different test voltages, the test to this touch display substrate can be completed.Because if each circuit of this touch display substrate connects correct, the picture of flicker will be presented on touch display substrate during test, the flicker of picture is substantially first with the region of public electrode block 12 correspondence, because the test voltage that each public electrode block 12 accesses is different, often row and in often arranging the flicker frequency of basic unit of adjacent two not identical; If there is open circuit in certain public electrode block 12, can determine not have flicker, if certain public electrode block 12 is short-circuited, so this public electrode block 12 will apply a voltage in addition, this just means that this public electrode block 12 has occurred the third flicker frequency compared with other public electrode block 12; Generally speaking, in row or column more easily there is short circuit phenomenon in adjacent two public electrode blocks 12, is often that the region of adjacent two public electrode block 12 correspondences occurs that flicker is abnormal simultaneously so appearance is glimmered during exception.
Principle is realized according to what glimmer, specifically as shown in Figure 3, in whole array, public electrode block 12 is divided into two classes, in described public electrode block 12, odd-numbered line odd column and public electrode block 12 corresponding to even number line even column are the first public electrode block 121, the cabling 13 of the first public electrode block 121 correspondence is connected to one the one VT test electrode, inputs the first test voltage; In described public electrode block 12, odd-numbered line even column and public electrode block 12 corresponding to even number line odd column are that the cabling 13 of the second public electrode block 122, second public electrode block 122 correspondence is connected to one the 2nd VT test electrode, input the second test voltage.When carrying out VT test, as shown in Figure 4, the first public electrode block 121 is by corresponding cabling 13 input test voltage VTcom1; Second public electrode block 122 is by corresponding cabling 13 input test voltage VTcom2.The synchronous phenomenon as long as appearance the first public electrode block 121 and the second public electrode block 122 glimmer, can confirm that this touch display substrate is substandard products.
In the principle of liquid crystal drive and scheme prior art be described in procedure for displaying more, be not described further at this.
Further, described cabling 13 is provided with the switch 14 of the break-make controlling public electrode block 12 and VT test electrode when detecting for VT.Described cabling 13 is multiplexed with public electrode wire and touch control electrode line.
Because VT test is only carried out in process of producing product, product will there will be no the test relating to this level after leaving and producing line, so product will be abandoned after leaving product line test relevant element to VT.And cabling 13 is multiplexed with public electrode wire and touch control electrode line, that is cabling 13 at least will realize the input of three places, switch 14 can be considered as place input wherein, multiplexing in order to what realize cabling 13, do not affect the functional realiey of the electrode wires of public electrode wire and touch-control in follow-up use procedure, switch 14 should be the position farthest away from public electrode block 12 in the input of three places.
Preferably, described switch 14 is thin film transistor (TFT).
The switch 14 of touch display substrate controls to belong to microelectronic control, realizes switch 14 by a thin film transistor (TFT).The source electrode of thin film transistor (TFT) is connected with public electrode block 12 with the one end in drain electrode, and the other end is connected with VT test electrode, and during test, grid inputs a level signal conducting membrane transistor, to public electrode block 12 input test voltage; After test terminates, maintained switch 14 is in normally open.
In the production run of product, described thin film transistor (TFT) with control thin film transistor (TFT) that liquid crystal turns in described touch display substrate and synchronously formed.The concrete forming process of thin film transistor (TFT) does not repeat at this.
Another kind is embodiment preferably, as shown in Figure 5, the public electrode block 12 that in described public electrode block 12, odd-numbered line odd column is corresponding is that the cabling of the 3rd public electrode block the 123, three public electrode block 123 correspondence is connected to one the 3rd VT test electrode, input the 3rd test voltage; The public electrode block 12 that in described public electrode block 12, odd-numbered line even column is corresponding is that the cabling of the 4th public electrode block the 124, four public electrode block 124 correspondence is connected to one the 4th VT test electrode, input the 4th test voltage; The public electrode block 12 that in described public electrode block 12, even number line odd column is corresponding is that the cabling of the 5th public electrode block the 125, five public electrode block 125 correspondence is connected to one the 5th VT test electrode, input the 5th test voltage; The public electrode block 12 that in described public electrode block 12, even number line even column is corresponding is that the cabling of the 6th public electrode block the 126, six public electrode block 126 correspondence is connected to one the 6th VT test electrode, input the 6th test voltage.
Specifically as shown in Figure 6, all public electrode blocks 12 are divided into the 3rd public electrode block 123, the 4th public electrode block 124, the 5th public electrode block 125 and the 6th public electrode block 126 4 class; Input test voltage VTcom3, test voltage VTcom34, test voltage VTcom5 and test voltage VTcom6 respectively.Under normal circumstances, the flicker frequency of any one public electrode block 12 of each public electrode block 12 and surrounding is different, and the situation that further avoid adjacent two public electrode blocks 12 short circuit on oblique line occurs.
In sum, by arranging at least two VT test electrodes, each VT test electrode exports different test voltages, and during VT test, the VT test electrode that the cabling 13 of any two adjacent public electrode block 12 correspondences is different from two is respectively connected; Be equivalent to be the different common electric voltage of the applying of two public electrode blocks 12, if the electrical connection of two public electrodes is normal when VT tests, the viewing area 11 of its correspondence will the different film flicker of the frequency of occurrences, realizes quick and precisely detecting.
A kind of VT method of testing of touch display substrate is additionally provided in the specific embodiment of the invention, this VT method of testing mainly realizes based on aforesaid touch display substrate, description not most in the embodiment of VT method of testing, please refer to the embodiment of aforementioned touch display substrate.Described touch display substrate comprises:
One substrate 1, comprises a viewing area 11 and non-display area 16;
Multiple public electrode block 12, is arranged at described viewing area 11 with array way, and described public electrode block 12 is multiplexed with touch control electrode;
Many cablings 13, each cabling 13 is electrically connected with a public electrode block 12 respectively;
At least two VT test electrodes, are arranged at described non-display area, export test voltage when testing for VT; The test voltage that described VT test electrode exports is different.
As shown in Figure 7, described VT method of testing comprises:
Step S71: each VT test electrode exports different test voltages by described cabling 13 to described public electrode block 12, and any two adjacent public electrode blocks 12 input different test voltages.
Step S72: the size switching the test voltage that VT test electrode exports.
Optionally, the method that each VT test electrode described exports different test voltages by described cabling 13 to described public electrode block 12 comprises:
Public electrode block 12 to odd-numbered line odd column and even number line even column inputs the first test voltage; And
Public electrode block 12 to odd-numbered line even column and even number line odd column inputs the second test voltage.
Another kind of optional, the method that each VT test electrode described exports different test voltages by described cabling 13 to described public electrode block 12 comprises:
The 3rd test voltage is inputted to the public electrode block 12 that odd-numbered line odd column is corresponding;
The 4th test voltage is inputted to the public electrode block 12 that odd-numbered line even column is corresponding;
The 5th test voltage is inputted to the public electrode block 12 that even number line odd column is corresponding; And
The 6th test voltage is inputted to the public electrode block 12 that even number line even column is corresponding.
After test under one group of test voltage terminates, switch the test voltage that VT test electrode exports, such as the first test voltage is+3V, and the second test voltage is-4V, and after switching, the first test voltage is-4V, and the second test voltage is-4V.Because likely certain specific first test voltage of group and the second test voltage present correct film flicker under the combined action of short circuit and/or open circuit, switch test voltage can ensure the substandard products detecting all existence.
Additionally provide a kind of display panels in the specific embodiment of the invention, comprise color film 2, and the touch display substrate described in aforementioned any one, and integrated circuit.
Concrete, please also refer to Fig. 1 and Fig. 8, described liquid crystal indicator comprises color film 2 and above-mentioned touch display substrate.Touch display substrate comprises a substrate 1, and other elements of touch display substrate are arranged on substrate 1, and substrate 1 is divided into viewing area 11 and non-display area 16; Touch-control IC15, VT test electrode and other integrated circuit realizing allocation function are arranged at non-display area 16, and the part on substrate 1 outside viewing area 11 is non-display area 16.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (11)
1. a touch display substrate, is characterized in that, comprising:
One substrate, comprises a viewing area and non-display area;
Multiple public electrode block, is arranged at described viewing area with array way, and described public electrode block is multiplexed with touch control electrode;
Many cablings, each cabling is electrically connected with a public electrode block respectively;
At least two VT test electrodes, are arranged at described non-display area, export test voltage when testing for VT, and the test voltage that each VT test electrode exports is different;
During VT test, different from two the respectively VT test electrode of the cabling that any two adjacent common electrode blocks are corresponding is electrically connected.
2. touch display substrate according to claim 1, is characterized in that, described cabling is provided with the switch of the break-make controlling public electrode block and VT test electrode when detecting for VT.
3. touch display substrate according to claim 2, is characterized in that, described switch is thin film transistor (TFT).
4. touch display substrate according to claim 3, is characterized in that, described thin film transistor (TFT) with control thin film transistor (TFT) that liquid crystal turns in described touch display substrate and synchronously formed.
5. touch display substrate according to claim 1, is characterized in that, described cabling is multiplexed with public electrode wire and touch control electrode line.
6. touch display substrate according to claim 1, is characterized in that, the public electrode block of odd-numbered line odd column and the cabling corresponding to public electrode block of even number line even column are electrically connected with one the one VT test electrode; The public electrode block of odd-numbered line even column and the cabling corresponding to public electrode block of even number line odd column are electrically connected with one the 2nd VT test electrode.
7. touch display substrate according to claim 1, is characterized in that, the cabling corresponding to public electrode block of odd-numbered line odd column is electrically connected with one the 3rd VT test electrode; The cabling corresponding to public electrode block of odd-numbered line even column is electrically connected with one the 4th VT test electrode; The cabling corresponding to public electrode block of even number line odd column is electrically connected with one the 5th VT test electrode; The cabling corresponding to public electrode block of even number line even column is electrically connected with one the 6th VT test electrode.
8. a VT method of testing for touch display substrate, is characterized in that, described touch display substrate comprises:
One substrate, comprises a viewing area and non-display area;
Multiple public electrode block, is arranged at described viewing area with array way, and described public electrode block is multiplexed with touch control electrode;
Many cablings, each cabling is electrically connected with a public electrode block respectively;
At least two VT test electrodes, are arranged at described non-display area, export test voltage when testing for VT; Described VT method of testing comprises:
Walk public electrode block described in alignment described in each VT test electrode passes through and export different test voltages, and any two adjacent public electrode blocks input different test voltages.
9. VT method of testing according to claim 8, is characterized in that, walks the method that public electrode block described in alignment exports different test voltages and comprise described in each VT test electrode described passes through:
Public electrode block to odd-numbered line odd column and even number line even column inputs the first test voltage; And
Public electrode block to odd-numbered line even column and even number line odd column inputs the second test voltage.
10. VT method of testing according to claim 8, is characterized in that, walks the method that public electrode block described in alignment exports different test voltages and comprise described in each VT test electrode described passes through:
To public electrode block input the 3rd test voltage that odd-numbered line odd column is corresponding;
To public electrode block input the 4th test voltage that odd-numbered line even column is corresponding;
To public electrode block input the 5th test voltage that even number line odd column is corresponding; And
To public electrode block input the 6th test voltage that even number line even column is corresponding.
11. 1 kinds of display panels, is characterized in that, comprise color film, also comprise the touch display substrate described in claim 1 ~ 7 any one, and integrated circuit.
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| CN105093593A (en) * | 2015-09-11 | 2015-11-25 | 京东方科技集团股份有限公司 | Display substrate and testing method and display device thereof |
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