CN106293186A - Touch-control display panel and method of testing thereof - Google Patents
Touch-control display panel and method of testing thereof Download PDFInfo
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- CN106293186A CN106293186A CN201510308443.1A CN201510308443A CN106293186A CN 106293186 A CN106293186 A CN 106293186A CN 201510308443 A CN201510308443 A CN 201510308443A CN 106293186 A CN106293186 A CN 106293186A
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Abstract
Touch-control display panel and method of testing thereof.The present invention proposes a kind of touch-control display panel, including: an infrabasal plate, it is formed with a common electrode layer, one first testing cushion and one second testing cushion；One upper substrate, towards this common electrode layer of this infrabasal plate；And a liquid crystal layer, it is sandwiched between this upper and lower substrate, wherein this common electrode layer is divided into multiple common electrodes of rectangular configuration, and in the plurality of common electrode, any two adjacent common electrodes can be respectively and electrically connected to this first testing cushion and this second testing cushion.
Description
Technical field
The present invention relates to a kind of touch-control display panel, and in particular to the whether short circuit of test common electrode,
Open circuit and the method for testing of the touch-control display panel to discharge pixel electrodes.
Background technology
Touch-control display panel refers to be integrated in display floater touch controllable function, and outside display floater not
The structure of contact panel is additionally set, such as, touch controllable function is integrated into display panels or organic electroluminescence
Light-emitting component (OLED) panel, referred to as In-cell touch display panel (In cell touch display panel),
The electrode structure that under such structure, usual touch controllable function often utilizes display floater existing realizes, therefore
Need not extra touch-control structure.Such as, it is fringe field switch type when In-cell touch display panel
During (Fringe Field Switching, FFS) display panels, it will usually by its common electrode pattern
Change, to be distinguished into multiple pieces, use as touch-control sensing electrode.
The essential structure of fringe field switch type liquid crystal display panel is as it is shown in figure 1, fringe field switch type
Display panels 10 from bottom to top, including lower Polarizer 11, infrabasal plate 12, tft layer
13, liquid crystal layer 14, both alignment layers 15, colored filter 16, upper substrate 17, upper Polarizer 18.Thin film
Transistor layer 13 also includes: pixel electrode 131, insulating barrier 132, common electrode 133, both alignment layers 134.
Produce electric field when plurality of pixel electrode 131 is applied in voltage between meeting and common electrode 133, and produce
Raw electric field can control liquid crystal molecule and rotate in the horizontal direction, thereby modulates the GTG of picture.It addition,
Colored filter 16 can also select to arrange a shielding layer towards the side of upper Polarizer 18, outside shielding
The interference in portion.
The common electrode of general such as Fig. 1 of the common electrode in fringe field switch type liquid crystal display panel
It it is the plane of whole piece shown in 133.This common electrode is then divided into rectangular configuration by touch-control display panel
Multiple electrode blocks, each electrode block still uses as general common electrode during showing, and
Then use as touch-control sensing electrode during touch control detection, by detecting electrode block and outside touch control object it
Between the electric capacity that formed, judge the position of touch control object.
The multiple electrode blocks being split to form by common electrode, must be electrically isolated from each other in structure, electrode
Block could detect individually position of touch.Therefore, touch-control display panel must first test each electricity before assembling
Pole block is the most electrically isolated and running is normal.
Summary of the invention
The present invention is based on above-mentioned purpose, and proposes a kind of touch-control display panel and method of testing thereof, it is possible to survey
The whether short circuit of examination common electrode, open circuit and to discharge pixel electrodes.
The present invention proposes a kind of touch-control display panel, including an infrabasal plate, be formed a common electrode layer,
One first testing cushion and one second testing cushion；One upper substrate, towards this common electrode layer of this infrabasal plate；
And a liquid crystal layer, it is sandwiched between this upper and lower substrate, wherein this common electrode layer is divided into multiple sharing
Any two adjacent common electrodes in electrode, and the plurality of common electrode can be respectively and electrically connected to this
One testing cushion and this second testing cushion.
In above-mentioned touch-control display panel, this infrabasal plate is more formed with one first control pad and multiple first
Switch element, the most the plurality of first switch element is connected to each this common electrode and shares electricity with this
Between this first testing cushion or this second testing cushion that pole is electrically connected with, and this first control pad is connected to
The control terminal of the plurality of first switch element.
In above-mentioned touch-control display panel, this common electrode layer is divided into rectangular configuration.
In above-mentioned touch-control display panel, this infrabasal plate is also formed with multiple data wire, one second control
Pad and multiple second switch element, the plurality of data wire of any of which bar can be by the plurality of second switch unit
In part one is connected to this first testing cushion or this second testing cushion, and this second control pad is connected to this
The control terminal of multiple second switch elements.
In above-mentioned touch-control display panel, the end face of this infrabasal plate is relative to this upper substrate the same side
End face highlights, and it is relative that this first testing cushion, this second testing cushion and the first control pad are formed at this infrabasal plate
In the region that this upper substrate is prominent.
In above-mentioned touch-control display panel, this common electrode block is tetragon, and each length of side of tetragon
Size between 1mm～5mm.
In above-mentioned touch-control display panel, this upper substrate is colored optical filtering substrates, and infrabasal plate is thin film
Transistor (TFT) array substrate.
According to another viewpoint of the present invention, the present invention proposes a kind of touch-control display panel, including: base once
Plate, is formed with a common electrode layer；One upper substrate, towards this common electrode layer of this infrabasal plate；One liquid
Crystal layer, is sandwiched between this upper and lower substrate, and wherein this common electrode layer is divided into the multiple of rectangular configuration
Common electrode, and each the plurality of common electrode is respectively and electrically connected to a plain conductor, respectively this metal
Wire extends to an edge of this infrabasal plate.
Also, according to another viewpoint of the present invention, the present invention is it is also proposed that the test side of a kind of touch-control display panel
Method, this touch-control display panel includes: multiple pixel electrodes, multiple common electrode, one first testing cushion,
And second testing cushion, in the most the plurality of common electrode, any two adjacent common electrodes can be distinguished electrically
Being connected to this first testing cushion and this second testing cushion, this method of testing is altogether with electric pole short circuit detection side
Method, including: the plurality of pixel electrode is charged to identical current potential；There is provided one first current potential to this first
Testing cushion and offer are not equal to one second current potential of this first current potential to this second testing cushion, make this touch-control show
Show the pattern of Display panel checkerboard；And check whether the pattern of this checkerboard has adjacent grid to have
The situation of identical GTG.
In above-mentioned method of testing, this touch-control display panel also includes: one first control pad and multiple
One switch element, the most the plurality of first switch element is connected to each common electrode and shares electricity with this
Between this first testing cushion or this second testing cushion that pole is electrically connected with, and this first control pad is connected to
The control terminal of the plurality of first switch element, this common electrode method for detecting short circuit also includes: provide one
Set current potential, to this first control pad, makes the plurality of first switching elements conductive.
In above-mentioned method of testing, this touch-control display panel also includes: multiple data wires, one second control
System pad and multiple second switch element, the plurality of data wire of any of which bar can pass through the plurality of second switch
In element one is connected to this first testing cushion or this second testing cushion, and this second control pad is connected to
The control terminal of the plurality of second switch element, this detection method is a charging method, including: make these many
Individual pixel electrode turns on the plurality of data wire；There is provided one the 3rd current potential to this first testing cushion and this second
Testing cushion；And provide a set current potential to this first control pad and this second control pad, make the plurality of the
One switch element and the plurality of second switch element conductive, use the plurality of discharge pixel electrodes.
In above-mentioned method of testing, this method of testing is a common electrode broken circuit detecting method, including:
The plurality of pixel electrode is charged to identical current potential；One the 4th current potential is provided to this first testing cushion and to be somebody's turn to do
Second testing cushion, makes the full frame display same gray level of this touch-control display panel；Check whether this picture has
The block that GTG is abnormal.
Touch-control display panel in accordance with the above and method of testing thereof, it is possible to test common electrode is the shortest
Road, open circuit and to discharge pixel electrodes.
Accompanying drawing explanation
Fig. 1 is the profile showing known fringe field switch type liquid crystal display panel.
Fig. 2 is the top view of the touch-control display panel of the present invention.
Fig. 3 A is showing the circuit diagram of a pixel according to an embodiment of the invention.
Fig. 3 B is showing common electrode and the configuration of tft layer according to an embodiment of the invention
The layout profile of relation.
Fig. 4 is common electrode short-circuit test circuit diagram according to an embodiment of the invention.
Fig. 5 A is that short-circuit test result is for testing normal schematic diagram.
Fig. 5 B be short-circuit test result be find short circuit schematic diagram.
Fig. 6 is the top view of the touch-control display panel of one embodiment of the invention.
Fig. 7 is the top view of the touch-control display panel of another embodiment of the present invention.
Fig. 8 is the top view of the touch-control display panel of another embodiment of the present invention.
Fig. 9 is discharge pixel electrodes circuit diagram according to an embodiment of the invention.
Figure 10 be the circuit operation showing Fig. 9 in display test pattern, common electrode short-circuit test pattern,
And an example of the change of each operation voltage during discharge pixel electrodes pattern.
[symbol description]
10,20,60,70,80～fringe field switch type liquid crystal display panel；
11～lower Polarizer；
12～infrabasal plate；
13～tft layer；
131～pixel electrode；
132～insulating barrier；
133～common electrode；
134～both alignment layers；
14～liquid crystal layer；
15～both alignment layers；
16～colored filter；
17～upper substrate；
18～upper Polarizer；
21～overlapping region；
22～outer pin field；
23～viewing area；
31～gate dielectric；
311～semiconductor channel layer；
32～gate capping layer；
33,34,35～interlayer insulating film；
36～electrode cover layer；
61,62～electronic pads；
63～control pad；
61 ', 62 ', 63 '～plain conductor；
81～redundant area；
C～conductive connection part；
Cst～pixel capacitance；
D～drain electrode liner；
Dy～data wire；
D [1], D [2], D [p], D [p+1]～data line-group；
Gx～gate line；
IC～control chip；
E1, E2～transparency electrode；
O～open circuit；
Px, y～pixel electrode；
P～conductive pole；
Sn, S1, S2, Sl-1, Sl, Sl+1, Sl+2, Sm, Sm+1～common electrode block；
Sa～the 1st source electrode liner；
Sb～the 2nd source electrode liner；
S～short circuit；
SB_VCOM, SB_DATA～control signal；
SW1, SW2～switch element；
TFT～thin film transistor (TFT)；
VCOM1, VCOM2～current potential；
Wn, W1, W2, Wl+1, Wl+2, Wm, Wm+1～plain conductor.
Detailed description of the invention
Touch-control display panel and display packing thereof below according to the graphic explanation present invention.Different graphic
And the explanation of correspondence indicates identical symbol represent that identical element omits repeat specification.
Fig. 2 is the top view of the touch-control display panel of the present invention.As in figure 2 it is shown, touch-control display panel 20
In, the upper substrate part overlapping with infrabasal plate is referred to as overlapping region 21 in the present invention, with LCD
As a example by plate, upper substrate is colored optical filtering substrates, and infrabasal plate is thin-film transistor array base-plate.And lower base
Wherein one end of plate highlights compared with upper substrate and not overlapping with upper substrate part is referred to as outer pin in the present invention
Region 22.A part in overlapping region 21 is actually used for showing the part of picture, in the present invention
It is referred to as viewing area 23.As in figure 2 it is shown, in viewing area 23, common electrode is divided into rectangular
Multiple common electrode block S1 of configuration, S2 ..., Sl-1, Sl, Sl+1, Sl+2 ..., Sm, Sm+1,
Any one common electrode block Sn (n is equal to the arbitrary integer in 1～m+1) is polygon, such as four limits
The shape such as shape, hexagon, but be not limited, and the present invention implements the shape that profit is citing tetragon,
And each length of side of tetragon is between 1mm～5mm.Each common electrode block Sn can be by least one
Individual conductive connection part C (illustrate at this 3) and plain conductor Wn (n equal to 1～m+1 in appoint
Meaning integer) connect.The touch-control display panel of the present invention is In-cell touch display panel, and display floater
Can be fringe field switch type (Fringe Field Switching, FFS) display panels, by it
Common electrode pattern, is to use as touch-control sensing electrode to be distinguished into the purpose of multiple pieces.All of
Plain conductor Wn is all connected to the control chip IC being arranged in outer pin field 22.Control chip IC
During showing, output common potential gives whole common electrode block Sn, then in order to examine during touch control detection
Survey each common electrode block Sn and have no-voltage change to determine whether touch-control.Here, the present invention's touches
Control detection is the driving detection mode using self-tolerant (self-capacitance), that is, by detecting whether
Between each common electrode block Sn and touch-control object (finger or pointer) formed capacitance, judge be
No have touch event to occur.Such as, when touch-control object is near each common electrode block Sn, each shared electricity
Can set up electric capacity between pole block Sn and touch-control object (finger or pointer), this electric capacity can affect discharge and recharge
Speed, therefore a controller can judge have touch event to occur according to this.
Common electrode block Sn and the position relationship of each metal in tft layer is understood in order to more convenient,
Fig. 3 A is showing the circuit diagram of a pixel according to an embodiment of the invention.Fig. 3 B is showing root
The layout profile of configuration relation according to common electrode and the tft layer of one embodiment of the invention.As
Shown in Fig. 3 A, the circuit of a pixel includes: gate lines G x (x is positive integer), data wire Dy (y
For positive integer), thin film transistor (TFT) TFT, pixel electrode Px, y is (in x, y correspondence gate line and data wire
X, y value) and common electrode Sn, wherein pixel electrode Px, structure between y and common electrode Sn
Pixel electric capacity Cst.Refer again to Fig. 3 B, pixel electrode Px, y, common electrode Sn and thin film transistor (TFT)
TFT lays respectively at different layers and forms multiple structure.This structure from bottom to top be respectively gate dielectric 31,
Gate capping layer 32, interlayer insulating film 33,34,35, electrode cover layer 36.Thin film transistor (TFT) TFT
Be formed in gate dielectric 31, gate capping layer 32 and interlayer insulating film 33, common electrode Sn and
Wire Wn is formed in interlayer insulating film 34,35, and pixel electrode Px, y are formed at electrode cover layer
In 36.Semiconductor channel layer 311 is had, in order to form the passage of thin film transistor (TFT) in gate dielectric 31.
Grid G (being electrically connected with gate lines G x) is formed on gate dielectric 31, and is covered by grid
Layer 32 is covered；Drain electrode liner D (being electrically connected with data wire Dy) and the 1st source electrode lining
Pad Sa is formed on gate capping layer 32, and is covered by interlayer insulating film 33, to planarize drain electrode
Electrode pad D and the 1st source electrode liner Sa；Drain electrode liner D and the 1st source electrode liner
Sa is all contacted with semiconductive layer passage 311 by the conductive pole p being constructed from a material that be electrically conducting；Plain conductor Wn
It is formed on interlayer insulating film 33 with the 2nd source electrode liner Sb and is covered by interlayer insulating film 34,
Wherein the 2nd source electrode liner Sb is served as a contrast by the conductive pole p being constructed from a material that be electrically conducting and the 1st source electrode
Pad Sa connects；Transparency electrode E1 constitutes common electrode Sn, is formed on interlayer insulating film 34 and quilt
Interlayer insulating film 35 is covered, under wherein transparency electrode E1 can be connected to be positioned at by conductive connection part C
The plain conductor Wn of layer；Multiple transparency electrodes E2 with certain intervals constitute pixel electrode Px, y,
Being formed on interlayer insulating film 35 and be partially covered by the electrodes layer 36 to be covered, wherein transparency electrode E2 can be led to
Cross the conductive pole p being constructed from a material that be electrically conducting and the 2nd source electrode liner Sb to connect.Construct by this, when
When driving pixel, pixel electrode Px, the electric lines of force that multiple transparency electrodes E2 in y are sent can pass through that
Gap between this and arrive common electrode Sn.The pixel profile construction of Fig. 3 B can cut open with the panel of Fig. 1
Surface construction contrasts, and wherein transparency electrode E1 (common electrode Sn) is corresponding to the common electrode in Fig. 1
133；Interlayer insulating film 35 is corresponding to the insulating barrier 132 in Fig. 1；Transparency electrode E2 (pixel electrode Px,
Y) corresponding to the pixel electrode 131 in Fig. 1；Both alignment layers 134 in electrode cover layer 36 corresponding diagram 1.
Wherein, gate dielectric 31, gate capping layer 32, interlayer insulating film 34,35 can be selected from oxidation
Silicon, silicon nitride, silicon oxynitride or a combination thereof；Interlayer insulating film 33 can comprise an insulation material as flatness layer
Material, such as perfluoroalkoxy resin (perfluoroalkoxy (PFA) polymer resin)；And it is electric
Pole cover layer 36 can be a kind of high-molecular organic material containing imide, e.g. polyimides
(Polyimide is called for short PI).
When panel manufactures, may be because of dirt between adjacent common electrode Sn or plain conductor Wn
Angstrom wait being mixed into of microgranule and form short circuit.Therefore must be advanced before control chip IC is formed on panel
The short-circuit test of row common electrode Sn, carrys out the situation of unshorting.
Fig. 4 is common electrode short-circuit test circuit diagram according to an embodiment of the invention.Fig. 5 is that short circuit is surveyed
The schematic diagram of the result of examination.In order to detect each adjacent common electrode Sn or plain conductor Wn it
Between whether have short circuit, the present invention makes the plain conductor that each bar is adjacent be respectively connecting to different current potentials, specifically
For, it is that the plain conductor Wn of odd number bar is connected to current potential VCOM1, by the plain conductor of even number bar
Wn is connected to current potential VCOM2.And each bar plain conductor Wn and current potential VCOM1 or VCOM2 it
Between, also can configure a switch element SW1, the control terminal of all of switch element SW1 is by controlling
Signal SB_VCOM is uniformly controlled, and thereby can integrally switch each plain conductor Wn and current potential
Conducting or non-conduction between VCOM1 and VCOM2.When common electrode short-circuit test, can pass through
Data wire Dy is by all of pixel electrode Px, and y charges to high gray voltage, then control signal
SB_VCOM is by whole switch element SW1 conductings so that the plain conductor Wn of odd number bar is connected to
Current potential VCOM1, the plain conductor Wn of even number bar are connected to current potential VCOM2.The most adjacent shares
Electrode Sn (S1 and S2 of such as longitudinal direction, or transverse direction S1 from Sl+1) will be in different
Current potential VCOM1 and current potential VCOM2.Assume adjacent plain conductor Wm Yu Wm+1 such as Fig. 4 institute
Showing, be short-circuited s between the two, then have an electric current between plain conductor Wm and Wm+1 and produce,
From current potential VCOM1 and current potential VCOM2 current potential the higher person flow to current potential junior (such as Fig. 4's
The direction of arrow) so that common electrode Sm that plain conductor Wm with Wm+1 is connected becomes with Sm+1
Become equal current potential.
The result of common electrode short-circuit test is as it is shown in figure 5, owing to adjacent common electrode block Sn is connected to
Different current potential VCOM1 and VCOM2, therefore as whole pixel electrode Px, y charges to the highest ash
During the voltage of rank, picture can present the pattern of checkerboard, and each grid corresponds to one piece of common electrode block Sn,
Adjacent grid presents different GTGs.When checkerboard pattern does not has defect (as shown in Figure 5A), table
Show that test result is normal.When the feelings being found to have adjacent grid in checkerboard pattern and presenting identical GTG
During condition (part got up such as Fig. 5 B centre circle), then it represents that the common electrode block Sn corresponding to the two grid
Between or plain conductor Wn between have short circuit phenomenon.Run business into particular one in the region occurred for short circuit the most again
The inspection in portion, the situation that unshorting occurs.
When the circuit of Fig. 4 is configured at the touch-control display panel of Fig. 2 by reality, specific example such as 6-8
Figure.Owing to during common electrode short-circuit test, control chip IC is the most unwelded, therefore it is represented by dotted lines.At figure
In 6, the outer pin field 22 of the infrabasal plate of touch-control display panel 60 is more configured with testing cushion 61, test
Pad 62, control pad 63.Testing cushion 61, testing cushion 62, control pad 63 are respectively connected with a metal and lead
Line, is 61 ', 62 ', 63 ' respectively.Article three, plain conductor 61 ', 62 ', 63 ' is each along in overlapping region
Border beyond viewing area 23 in 21 extends, until the top margin of overlapping region 21.Switch unit
Part SW1 is configured at the top margin of overlapping region 21, is connected to plain conductor 61 ' and leads with odd number bar metal
Between line Wn, and it is connected between plain conductor 62 ' and even number bar plain conductor Wn.All of open
The control terminal closing element SW1 is connected to plain conductor 63 '.When carrying out common electrode short-circuit test,
Testing cushion 61 can be applied in current potential VCOM1, and testing cushion 62 can be applied in current potential VCOM2, control pad
63 can be applied in control signal SB_VCOM, and now the current potential of control signal SB_VCOM can be by all
Switch element SW1 conducting, reach the common electrode short-circuit test of described above.
Test circuit is configured at another specific example of touch-control display panel as it is shown in fig. 7, touch-control shows
The plain conductor 61 ', 62 ', 63 ' of panel 70 and switch element SW1 also can all be configured at overlapping region
The bottom margin of 21.This is used to construct in addition to can carrying out the common electrode short-circuit test identical with Fig. 6,
The plain conductor Wn of each common electrode block Sn can also be carried out out of circuit test.Touch-control display panel
70 before carrying out common electrode short-circuit test, can first carry out display test.Specifically, it is simply that by number
According to line Dy by all of pixel electrode Px, y charges to same gray scale voltage, and by all common electrodes
The voltage (testing cushion 61 and testing cushion 62 are applied in identical current potential) that block Sn supply is identical, then mat
By whether viewing picture having bright dim spot to determine whether that pixel is abnormal.And the structure of Fig. 7 special it
Place is, carries out also testing during display test each the plain conductor Wn of common electrode block Sn simultaneously
Whether there is open circuit.Assume that plain conductor W1 occurs open circuit o as shown in Figure 7, then common electrode block S1
Current potential can be different from the current potential of every other common electrode block, it will thus be seen that there is one in frame out
Grid GTG is abnormal, and this grid corresponds to common electrode block S1, therefore can judge the gold of electrode block S1
Belong to and have open circuit on wire W1.
Test circuit is configured at another specific example of touch-control display panel as shown in Figure 8, and touch-control shows
Testing cushion 61, testing cushion 62, control pad 63, plain conductor 61 ', 62 ', 63 ' in panel 80 and open
Close element SW1 and be all arranged in the redundant area 81 outside panel, and plain conductor Wn can extend to base
In the middle of redundant area 81 outside plate.Redundant area 81 is probably a part for infrabasal plate originally, altogether
Electricity consumption pole short-circuit test can whole excision after completing.Therefore, in the middle of this structure, when redundant area 81
After cut, can only observe that plain conductor Wn extends to substrate from the outward appearance of touch-control display panel 80
Edge.Or, in another embodiment, it is also possible to utilize laser to will be located in switch element SW1 with each
Each plain conductor Wn etching between common electrode Sn disconnects, such as, in Fig. 8, utilize laser along one
Line of cut (i.e. redundant area 81 adjoins the solid line of overlapping region 21) etches, to electrically isolate switch element
SW1 and each common electrode Sn.
Touch-control display panel through display test, common electrode out of circuit test, common electrode short-circuit test after,
If no problem can carry out follow-up number of assembling steps.But, in the touch-control display panel after test several times
There may be residual charge, if pixel electrode has residual charge for a long time, then easily cause liquid crystal molecule pole
Change, and damage display floater.Therefore, the present invention further improves the circuit of Fig. 4 so that it is provide right
The function of discharge pixel electrodes.
Fig. 9 is discharge pixel electrodes circuit diagram according to an embodiment of the invention.In fig .9, except
Outside the circuit of Fig. 4, data line-group D [1], D [2] ..., D [p], D [p+1] also can be respectively by switches
Element SW2 is connected to provide on the plain conductor of current potential VCOM1 or VCOM2, all of switch unit
The control terminal of part SW2 is uniformly controlled by control signal SB_DATA, thereby can integrally switch each
Conducting or non-conduction between data line-group and current potential VCOM1 and VCOM2.Here, should be noted
It is that the symbol of any one D [n] (n is the integer more than 1) represents the group being made up of the data wire of at least one
Group, is not only defined in a data line.Furthermore, though Fig. 9 video data line-group D [1] is by switch unit
Part SW2 is connected to provide the plain conductor of current potential VCOM1, and data line-group D [2] pass through switch element
SW2 is connected to provide the plain conductor of current potential VCOM2, but actually data line-group D [1], D [2] are also
Can be simultaneously connected on same plain conductor.During this is because carry out discharge pixel electrodes, current potential
VCOM1 is identical with current potential VCOM2, thus data line-group be connected to provide current potential VCOM1 or
The plain conductor any bar of VCOM2 all may be used.When carrying out discharge pixel electrodes, all of gate lines G x makes
Transistor films TFT turns on, and control signal SB_VCOM and control signal SB_DATA each turn on
Switch element SW1, SW2 turn on so that all common electrode Sn and all of data lines Dy all connect
Receive current potential VCOM1 or VCOM2, owing to now current potential VCOM1 is equal to current potential VCOM2, because of
The residual charge of pixel electrode thereby can be put by the data wire in these all pixels with common electrode isoelectric level
Electricity.
Alternatively, it is also possible to according to three kinds of configuration modes of 6-8 figure, the circuit of Fig. 9 is configured at Fig. 2
Touch-control display panel in, now switch element SW2 can be added thereto, and increase a control pad (not
Diagram) other in control pad 63, it is used for providing control signal SB_DATA to all switch element SW2's
Control terminal.In addition to above-mentioned discrepancy, remaining feature is all identical with 6-8 figure, therefore not repeat specification.
When the touch-control display panel of the present invention uses the circuit of Fig. 9, it is operable in display test, shares electricity
Pole short-circuit test and discharge pixel electrodes Three models.When whole explanation of below uniting carries out these three pattern
Current potential VCOM1, VCOM2 and control signal SB_VCOM, the change of SB_DATA.Figure 10
It is that the circuit operation showing Fig. 9 is in display test pattern, common electrode short-circuit test pattern and pixel
One example of the change of each operation voltage during electrode discharge pattern.In the example of Figure 10, will touch
Control display floater sequentially operates in display test pattern I, common electrode short-circuit test pattern II and pixel
Electrode discharge pattern III, and assume that switch element SW1, SW2 are to be applied in high potential at control terminal
Time the nmos pass transistor that can turn on.As shown in Figure 10, when operating in display test pattern I, electricity
Position VCOM1 and VCOM2 equal (such as-1V), control signal SB_VCOM is high potential H
Making switch element SW1 turn on, control signal SB_DATA is that electronegative potential L makes switch element SW2 not
Whether conducting, thereby have bright dim spot or display abnormal on detection picture；Survey when operating in common electrode short circuit
During die trial Formula II, current potential VCOM1 and VCOM2 unequal (such as current potential VCOM1 is-0.5V,
Current potential VCOM2 is-1.5V), control signal SB_VCOM is that high potential H makes switch element SW1
Conducting, control signal SB_DATA is that electronegative potential L makes switch element SW2 be not turned on, and thereby makes picture
Present the situation that checkerboard pattern detects whether that adjacent grid GTG is identical；When operating in pixel electricity
During the discharge mode III of pole, current potential VCOM1 and VCOM2 equal (such as 0V), control signal
SB_VCOM is that high potential H makes switch element SW1 turn on, and control signal SB_DATA is also high electricity
Position H makes switch element SW2 turn on, and thereby makes whole common electrodes Sn and pixel electrode Px, y etc.
Current potential, discharges into the residual charge of pixel electrode Px, y in data wire Dy, and by switch element
The conducting state of SW2 is by residual charge ground connection (assuming that current potential VCOM1 and VCOM2 is ground connection).
The touch-control display panel using the circuit of Fig. 9 as seen from Figure 10 is operable in Three models, but
Each operation voltage above-mentioned is only and illustrates, and is not limited to the scope of the present invention.It addition, the present invention
Switch element SW1, SW2 can also be the PMOS that can turn on when control terminal is applied in electronegative potential
Transistor.
Whole embodiments in accordance with the above, the present invention proposes a kind of touch-control display panel and test side thereof
Method, it is possible to the whether short circuit of test common electrode, open circuit and to discharge pixel electrodes.
Though the present invention illustrates with above-described embodiment, but it is not limited to this.Furthermore, in ability
Field technique personnel are without departing under idea of the invention and equivalents, and claims must solve widely
Release to include the embodiment of the present invention and other deformation.
Claims (12)
1. a touch-control display panel, including:
Infrabasal plate, is formed with common electrode layer, the first testing cushion and the second testing cushion；
Upper substrate, towards this common electrode layer of this infrabasal plate；And
Liquid crystal layer, is sandwiched between this upper and lower substrate,
Wherein this common electrode layer be divided in multiple common electrode, and the plurality of common electrode any two
Adjacent common electrode can be respectively and electrically connected to this first testing cushion and this second testing cushion.
2. touch-control display panel as claimed in claim 1, wherein this common electrode layer is divided into rectangular
Configuration.
3. touch-control display panel as claimed in claim 1, wherein this infrabasal plate is more formed with the first control
Pad and multiple first switch element,
The most the plurality of first switch element is connected to each this common electrode and this common electrode institute electricity
Property between this first testing cushion or this second testing cushion that connect, and this first control pad is connected to the plurality of
The control terminal of the first switch element.
4. touch-control display panel as claimed in claim 3, wherein this infrabasal plate is also formed with multiple data
Line, the second control pad and multiple second switch element,
The plurality of data wire of any of which bar can be connected to this by the plurality of second switch element
First testing cushion or this second testing cushion, and this second control pad is connected to the plurality of second switch element
Control terminal.
5. touch-control display panel as claimed in claim 3, wherein the end face of this infrabasal plate is relative to this
The end face of upper substrate the same side highlights, and this first testing cushion, this second testing cushion and the first control pad are formed
In the region that this infrabasal plate is prominent relative to this upper substrate.
6. touch-control display panel as claimed in claim 1, wherein this common electrode block is tetragon, and
The size of each length of side of tetragon is between 1mm～5mm.
7. touch-control display panel as claimed in claim 1, wherein this upper substrate is colored optical filtering substrates,
And infrabasal plate is thin-film transistor array base-plate.
8. a touch-control display panel, including:
Infrabasal plate, is formed with common electrode layer；
Upper substrate, towards this common electrode layer of this infrabasal plate；
Liquid crystal layer, is sandwiched between this upper and lower substrate,
Wherein this common electrode layer is divided into multiple common electrodes of rectangular configuration, and each is the plurality of
Common electrode is respectively and electrically connected to plain conductor, and respectively this plain conductor extends to the edge of this infrabasal plate.
9. a method of testing for touch-control display panel, this touch-control display panel includes: multiple pixel electrodes,
Multiple common electrodes, the first testing cushion and the second testing cushion, in the most the plurality of common electrode arbitrarily
Two adjacent common electrodes can be respectively and electrically connected to this first testing cushion and this second testing cushion,
This method of testing is common electrode method for detecting short circuit, including:
The plurality of pixel electrode is charged to identical current potential；
There is provided the second current potential that the first current potential to this first testing cushion and offer is not equal to this first current potential to being somebody's turn to do
Second testing cushion, makes the pattern of this touch-control display panel display checkerboard；And
Check whether the pattern of this checkerboard has adjacent grid to have the situation of identical GTG.
10. the method for testing of touch-control display panel as claimed in claim 9, wherein this touch-control display panel
Also including: the first control pad and multiple first switch element, the most the plurality of first switch element connects respectively
It is connected to this first testing cushion or this second testing cushion that each common electrode is electrically connected with this common electrode
Between, and this first control pad is connected to the control terminal of the plurality of first switch element,
This common electrode method for detecting short circuit also includes:
There is provided set current potential to this first control pad, make the plurality of first switching elements conductive.
The method of testing of 11. touch-control display panels as claimed in claim 9, wherein this touch-control display panel
Also include: multiple data wires, the second control pad and multiple second switch element, any of which bar is the plurality of
Data wire can be connected to this first testing cushion or this second survey by the plurality of second switch element
Examination pad, and this second control pad is connected to the control terminal of the plurality of second switch element,
This detection method is charging method, including:
The plurality of pixel electrode is made to turn on the plurality of data wire；
There is provided the 3rd current potential to this first testing cushion and this second testing cushion；And
There is provided set current potential to this first control pad and this second control pad, make the plurality of first switch element
And the plurality of second switch element conductive, use the plurality of discharge pixel electrodes.
The method of testing of 12. touch-control display panels as claimed in claim 9, wherein this method of testing is altogether
Use electrode broken circuit detecting method, including:
The plurality of pixel electrode is charged to identical current potential；
There is provided the 4th current potential to this first testing cushion and this second testing cushion, make the complete of this touch-control display panel
Picture display same gray level；
Check whether this picture has the block of GTG exception.
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| CN201510308443.1A CN106293186A (en) | 2015-06-08 | 2015-06-08 | Touch-control display panel and method of testing thereof |
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| CN201510308443.1A CN106293186A (en) | 2015-06-08 | 2015-06-08 | Touch-control display panel and method of testing thereof |
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| CN201510308443.1A Pending CN106293186A (en) | 2015-06-08 | 2015-06-08 | Touch-control display panel and method of testing thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782255A (en) * | 2017-03-23 | 2017-05-31 | 京东方科技集团股份有限公司 | One kind detection circuit, detection method and detection means |
| CN106875879A (en) * | 2017-04-24 | 2017-06-20 | 上海天马有机发光显示技术有限公司 | A kind of display panel, electronic equipment and method of testing |
| CN107037928A (en) * | 2017-04-27 | 2017-08-11 | 厦门天马微电子有限公司 | A kind of contact panel and its method of testing |
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| CN108287624A (en) * | 2017-12-19 | 2018-07-17 | 南京中电熊猫平板显示科技有限公司 | A kind of embedded touch driving circuit, touch panel and driving method |
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| WO2019109440A1 (en) * | 2017-12-05 | 2019-06-13 | 深圳市华星光电技术有限公司 | Circuit and method for detecting short circuit of common electrode wiring |
| CN110442269A (en) * | 2019-01-18 | 2019-11-12 | 友达光电股份有限公司 | Touch control unit and touch-control display panel |
| CN112397038A (en) * | 2019-08-13 | 2021-02-23 | 群创光电股份有限公司 | Method for compensating brightness of abnormal pixel of display device |
| CN113129827A (en) * | 2019-12-31 | 2021-07-16 | 乐金显示有限公司 | Embedded touch organic light emitting diode display device and test method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325048A (en) * | 2008-07-14 | 2008-12-17 | 昆山龙腾光电有限公司 | Liquid crystal display device and driving method thereof |
| CN102005192A (en) * | 2009-09-01 | 2011-04-06 | 精工爱普生株式会社 | Video processing circuit, processing method thereof, liquid crystal display apparatus and electronics device |
| CN102455525A (en) * | 2010-10-18 | 2012-05-16 | 北京京东方光电科技有限公司 | Method and device for detecting thin film transistor liquid crystal display panel |
| CN103472613A (en) * | 2013-09-13 | 2013-12-25 | 敦泰科技有限公司 | Capacitive touch display device |
| CN103969538A (en) * | 2013-01-24 | 2014-08-06 | 上海天马微电子有限公司 | Electric testing method of embedded touch screen |
| CN104516609A (en) * | 2014-12-19 | 2015-04-15 | 深圳市华星光电技术有限公司 | Embedded touch panel detecting and manufacturing method |
| CN104570417A (en) * | 2014-12-23 | 2015-04-29 | 上海天马微电子有限公司 | Liquid crystal display screen and electronic equipment |
-
2015
- 2015-06-08 CN CN201510308443.1A patent/CN106293186A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325048A (en) * | 2008-07-14 | 2008-12-17 | 昆山龙腾光电有限公司 | Liquid crystal display device and driving method thereof |
| CN102005192A (en) * | 2009-09-01 | 2011-04-06 | 精工爱普生株式会社 | Video processing circuit, processing method thereof, liquid crystal display apparatus and electronics device |
| CN102455525A (en) * | 2010-10-18 | 2012-05-16 | 北京京东方光电科技有限公司 | Method and device for detecting thin film transistor liquid crystal display panel |
| CN103969538A (en) * | 2013-01-24 | 2014-08-06 | 上海天马微电子有限公司 | Electric testing method of embedded touch screen |
| CN103472613A (en) * | 2013-09-13 | 2013-12-25 | 敦泰科技有限公司 | Capacitive touch display device |
| CN104516609A (en) * | 2014-12-19 | 2015-04-15 | 深圳市华星光电技术有限公司 | Embedded touch panel detecting and manufacturing method |
| CN104570417A (en) * | 2014-12-23 | 2015-04-29 | 上海天马微电子有限公司 | Liquid crystal display screen and electronic equipment |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782255A (en) * | 2017-03-23 | 2017-05-31 | 京东方科技集团股份有限公司 | One kind detection circuit, detection method and detection means |
| US10529271B2 (en) | 2017-04-24 | 2020-01-07 | Shanghai Tianma AM-OLED Co., Ltd. | Display panel, electronic device and test method |
| CN106875879A (en) * | 2017-04-24 | 2017-06-20 | 上海天马有机发光显示技术有限公司 | A kind of display panel, electronic equipment and method of testing |
| CN107037928A (en) * | 2017-04-27 | 2017-08-11 | 厦门天马微电子有限公司 | A kind of contact panel and its method of testing |
| CN107037928B (en) * | 2017-04-27 | 2019-11-05 | 厦门天马微电子有限公司 | A kind of touch panel and its test method |
| CN107942186A (en) * | 2017-09-07 | 2018-04-20 | 友达光电股份有限公司 | Detection method and display panel |
| CN107942186B (en) * | 2017-09-07 | 2020-06-05 | 友达光电股份有限公司 | Detection method and display panel |
| TWI647682B (en) * | 2017-09-07 | 2019-01-11 | 友達光電股份有限公司 | Detection method and display panel |
| CN107861658A (en) * | 2017-11-29 | 2018-03-30 | 上海中航光电子有限公司 | Display panel and display device |
| CN107861658B (en) * | 2017-11-29 | 2021-05-14 | 上海中航光电子有限公司 | Display panel and display device |
| WO2019109440A1 (en) * | 2017-12-05 | 2019-06-13 | 深圳市华星光电技术有限公司 | Circuit and method for detecting short circuit of common electrode wiring |
| CN108287624A (en) * | 2017-12-19 | 2018-07-17 | 南京中电熊猫平板显示科技有限公司 | A kind of embedded touch driving circuit, touch panel and driving method |
| CN108196404A (en) * | 2017-12-29 | 2018-06-22 | 深圳市华星光电半导体显示技术有限公司 | Color membrane substrates, liquid crystal display panel and liquid crystal display |
| CN108196404B (en) * | 2017-12-29 | 2020-06-05 | 深圳市华星光电半导体显示技术有限公司 | Color film substrate, liquid crystal display panel and liquid crystal display |
| CN108614380A (en) * | 2018-04-23 | 2018-10-02 | 深圳市华星光电技术有限公司 | Display panel |
| WO2019242134A1 (en) * | 2018-06-20 | 2019-12-26 | 深圳市华星光电半导体显示技术有限公司 | Method for fabricating ito common electrode on cf substrate side |
| CN108828801A (en) * | 2018-06-20 | 2018-11-16 | 深圳市华星光电半导体显示技术有限公司 | The production method of CF substrate-side common electrode of ITO |
| US10928685B1 (en) | 2018-06-20 | 2021-02-23 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Manufacturing method for ITO common electrode on CF substrate side |
| CN110442269A (en) * | 2019-01-18 | 2019-11-12 | 友达光电股份有限公司 | Touch control unit and touch-control display panel |
| CN112397038A (en) * | 2019-08-13 | 2021-02-23 | 群创光电股份有限公司 | Method for compensating brightness of abnormal pixel of display device |
| CN113129827A (en) * | 2019-12-31 | 2021-07-16 | 乐金显示有限公司 | Embedded touch organic light emitting diode display device and test method thereof |
| CN113763848A (en) * | 2020-06-04 | 2021-12-07 | 群创光电股份有限公司 | Display panel |
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