CN102455960B - Detection device and detection method - Google Patents
Detection device and detection method Download PDFInfo
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- CN102455960B CN102455960B CN201010524414.6A CN201010524414A CN102455960B CN 102455960 B CN102455960 B CN 102455960B CN 201010524414 A CN201010524414 A CN 201010524414A CN 102455960 B CN102455960 B CN 102455960B
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Abstract
A detection apparatus for performing touch detection line short detection on a touch display panel including a substrate and scan lines, data lines, and a plurality of touch detection lines formed on the substrate, the detection apparatus comprising: the touch detection circuit comprises a short-circuit bar, a switch control line and a plurality of control switches corresponding to the touch detection lines respectively, wherein the short-circuit bar is connected with the data lines and the scanning lines; the control switch is controlled by the switch control line, and when the control switch is started, the control switch is communicated with the corresponding touch detection line and the corresponding data line. The detection device has a simple structure and occupies a small design space. The detection method for detecting the short circuit by using the detection device is simple, and can accurately judge the short circuit position, so that the touch display panel is repaired, and the yield of products is improved.
Description
Technical field
The present invention relates to a kind of touch-control display panel, more specifically, the present invention relates to a kind of pick-up unit that the short circuit of touch-control display panel is detected and detection method.
Background technology
Touch-screen is replacing the input mode of mouse and keyboard at present, information can be inputed to touch-screen by finger or felt pen, touch screen operation is convenient, allow user while viewing touch-screen, perform the operation needed, therefore touch-screen optimal input mode under being also considered to be in graphical user interface environment.At present, touch-screen is widely used in mobile phone, personal digital assistant, banking terminal etc.Touch-screen and display panel are combined into touch-control display panel.Touch-control display panel can be divided into resistance-type, condenser type, optical profile type, sound wave type and electromagnetic touch-control display panel etc. according to the difference of data detection method.And electric resistance type touch control display panel, because its cost is lower and ease of use is higher, be widely used.
Existing major part is touch-screen and display panel are separated to manufacture with the touch-control display panel of touch-input function, is produced on together by the mode of assembling.But touch-screen and display panel are fitted together the thickness that the touch-control display panel realizing touch-input function will certainly increase touch-control display panel, and owing to adding some layers of clear glass or film, display transparent rate and contrast also can obviously decline.And the cost of the touch-control display panel assembled by the way is high.
Therefore, prior art also been proposed embedded electric resistance touch screen, resistive touch screen structure is formed in display panels, to realize touch-input function.
Application number is the Chinese patent application of 200810096044.3, discloses a kind of electric resistance type touch control display panel, and Fig. 1 is the schematic top plan view of electric resistance type touch control display panel, and Fig. 2 is the diagrammatic cross-section of electric resistance type touch control display panel.Composition graphs 1 and Fig. 2, electric resistance type touch control display panel 100 comprises first substrate 200 (infrabasal plate) and second substrate 300 (upper substrate).First substrate 200 comprises multi-strip scanning line 210, a plurality of data lines 220, multiple pixel cell 230 and multiple touch control unit 240, and wherein sweep trace 210 and data line 220 define multiple pixel region 260 on first substrate 200.Each pixel region 260 comprises a pixel cell 230.Each pixel cell 230 comprises a first film transistor 232 and pixel electrode 234, and the first film transistor 232 and a sweep trace 210 and a data line 220 are electrically connected.Pixel electrode 234 and thin film transistor (TFT) 232 are electrically connected.Touch control unit 240 comprises touching signals sensing circuit 242 and touches terminal 244, touches terminal 244 and electrically connects with touching signals sensing circuit 242.Touching signals sensing circuit 242 comprises the second thin film transistor (TFT) 242a and back-end circuit 242b, and back-end circuit 242b and the second thin film transistor (TFT) 242a is electrically connected, and is read the voltage touching terminal 244 by the second thin film transistor (TFT) 242a.
When detecting touch action, the detection of touch location is undertaken by X-direction and Y-direction.Composition graphs 1 and Fig. 2, when a touch is present, in prior art, the position of X-direction is judged by the sequential of sweep trace 210; And the position of Y-direction, be then judged by touch control unit 240.When finger presses, the voltage on the public electrode 330 on second substrate 300 can be made by touching terminal 244, through the second thin film transistor (TFT) 242a, transfer to back-end circuit 242b, the voltage of the public electrode 330 on such second substrate 300 can make the voltage of the back-end circuit 242b of touching signals sensing circuit 242 change, and then can judge the position of Y-direction.
But above-mentioned touch-control display panel, in its manufacture process, unavoidably there is foreign matter, still with reference to figure 2, there is foreign matter 400 with the touch terminal 244 on first substrate 200 in the public electrode 330 on second substrate 300.Now even without the generation of touch action, voltage on public electrode 330 on second substrate 300 also can transfer to the touch terminal 244 of first substrate 200 by foreign matter 400, therefore, when sweep trace 210 is opened, voltage on public electrode 330 on second substrate 300 will transfer to back-end circuit 242b through the second thin film transistor (TFT) 242a, make the change in voltage of the back-end circuit 242b of touching signals sensing circuit 242, therefore, although without any touch action occur, touch-control display panel still can be determined with touch action occur.In addition, if formed in the process of touch lug 320 in etching, defect due to etching technics causes touch lug 320 too high, as shown in phantom in FIG., and then after the public electrode 330 on second substrate 300 covers touch lug 320, the public electrode 330 on second substrate 300 also can contact with touch terminal 244 and then cause short circuit.
And prior art does not provide and how to detect for above-mentioned short-circuit conditions.
Summary of the invention
What the present invention solved is in prior art, cannot detect, cause finished product to be scrapped, problem that product yield is low owing to touching short circuit between terminal and public electrode.
For solving the problems of the technologies described above, the invention provides a kind of pick-up unit, for carrying out touch detection line short-circuit detecting to touch-control display panel, multi-strip scanning line, data line and touch detection line that described touch-control display panel comprises substrate and formed on the substrate, it is characterized in that, described pick-up unit comprises: short bar, thread switching control, the gauge tap corresponding respectively with described touch detection line, wherein
Described short bar is connected with described data line, sweep trace;
Described gauge tap is by described switch control rule line traffic control, and when described gauge tap is opened, the touch detection line corresponding with it is communicated with data line by described gauge tap.
Alternatively, described gauge tap is thin film transistor (TFT), and the grid of wherein said thin film transistor (TFT) is connected with described thread switching control, and the source electrode of described thin film transistor (TFT) is connected with data line with described touch detection line respectively with drain electrode.Alternatively, the touch detection line being connected to same gauge tap described in is adjacent with data line.
Alternatively, described touch-control display panel also comprises multiple redness, green, blue subpixels unit; Described short bar comprises the short bar be connected with odd line interlace line, the short bar be connected with even number line sweep trace, the short bar that the data line be connected with red sub-pixel unit is connected, the short bar that the data line be connected with green sub-pixels unit is connected, and the short bar that the data line be connected with blue subpixels unit is connected.
Alternatively, the calibrating terminal be connected with described short bar is also comprised.
The present invention also provides a kind of method for detecting short circuit utilizing above-mentioned detection device, and for detecting the short circuit between the touch terminal of described touch-control display panel and public electrode, described detection method comprises the steps:
To the described short bar and the thread switching control applying high voltage that are connected to sweep trace, to open each sub-pixel unit switch and gauge tap;
By the short bar being connected to data line, detection signal is applied to each pixel electrode;
According to the line defect of described touch-control display panel, judge whether to there is the short circuit of touch detection line.
Alternatively, the described line defect according to described touch-control display panel, judges whether to there is the short circuit of touch detection line, comprising:
Under normal white mode, touch-control display panel shows black picture or grey picture, if bright line appears in touch-control display panel, then it is determined that the presence of and touches detection line short circuit;
Or under normal black pattern, touch-control display panel shows white picture or grey picture, if concealed wire appears in touch-control display panel, then it is determined that the presence of and touch detection line short circuit.
Alternatively, also comprise and will detect that the touch detection line of short circuit cuts off.
Alternatively, described being cut to adopts the mode of radium-shine cutting to be cut off by the described touch detection line that detects, described in the touch detection line of short circuit that detects refer to the touch detection line be connected to the data line of the sub-pixel unit be connected to corresponding to described bright line or concealed wire in a gauge tap.
Alternatively, also comprise: before described short-circuit detecting, line defect detection is carried out to the data line of described touch-control display panel.
Alternatively, the described data line to described touch-control display panel carries out line defect detection, specifically comprises the steps:
Voltage is applied to the public electrode of described touch-control display panel;
High voltage is applied to the described short bar being connected to sweep trace, to open each sub-pixel unit switch, by the described short bar being connected to data line, detection signal is applied to each pixel electrode;
Low-voltage is applied, to close described gauge tap to described thread switching control;
According to the display situation of described touch-control display panel, judge whether the line defect that there is data line.
Compared with prior art, technique scheme tool has the following advantages:
Pick-up unit of the present invention, is only made up of short bar, thread switching control and gauge tap, and structure is simple, and the design space occupied is less.
Apply the detection method that the short circuit of pick-up unit of the present invention to touch-control display panel detects, gauge tap is adopted to be connected with data line by touch detection line, judge whether to there is short circuit by the display situation of the sub-pixel unit be connected with data line, Comparison between detecting methods is simple, and location of short circuit can be judged exactly, and then touch-control display panel is repaired, improve the yield of product.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of the touch-control display panel of prior art;
Fig. 2 is the diagrammatic cross-section of the touch-control display panel of prior art;
Fig. 3 is the pick-up unit schematic diagram of the specific embodiment of the invention;
Fig. 4 is the schematic diagram that the pick-up unit of the specific embodiment of the invention is connected with touch-control display panel;
Fig. 5 is the circuit diagram that the pick-up unit of the specific embodiment of the invention is connected with touch-control display panel;
Fig. 6 is the process flow diagram of specific embodiment of the invention detection method.
Embodiment
In prior art, in touch-control display panel manufacture process, unavoidably there is foreign matter, when sweep trace is opened in the public electrode of upper substrate and the touch terminal of infrabasal plate, voltage on upper substrate public electrode can transfer to infrabasal plate by foreign matter and touch terminal, causes short circuit.In addition, the touch lug caused due to etching technics defect is too high, public electrode also can be caused to contact with touch terminal, cause short circuit.The short circuit that above-mentioned two kinds of reasons cause, can cause the erroneous judgement to touch action.Touch even without to touch-control display panel, touch-control display panel also can be judged as that touch action occurs.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
The pick-up unit of the specific embodiment of the invention is used for the short-circuit detecting carrying out touching detection line to touch-control display panel, described touch-control display panel comprises the upper substrate and infrabasal plate, the multi-strip scanning line be formed on described infrabasal plate, data line and touch detection line that are oppositely arranged, described pick-up unit comprises: short bar, thread switching control, the gauge tap that multiple and described touch detection line is corresponding respectively, wherein
Described short bar is connected with described data line, sweep trace;
Described gauge tap is by described switch control rule line traffic control, and when described gauge tap is opened, the touch detection line corresponding with it is communicated with data line by described gauge tap.
Illustrate accordingly below in conjunction with the pick-up unit of touch-control display panel to the specific embodiment of the invention.
To choose 4 sweep traces, 4 data lines, the 1 touch detection line in touch-control display panel in the present embodiment, the pick-up unit of the present embodiment is described.
See Fig. 3, Fig. 3 is the schematic diagram of the pick-up unit of the present embodiment, comprise short bar 101, 102, 103, 105, 106, short bar 101, 102, 103 are respectively used to the data line connecting touch-control display panel, short bar 105 and 106 is respectively used to be connected the odd-numbered line of touch-control display panel and the sweep trace of even number line, the gauge tap 110 also comprising thread switching control 104 and controlled by thread switching control 104, gauge tap 110 is communicated with data line for controlling the touch detection line corresponding with it, gauge tap 110 can be polycrystalline SiTFT or amorphous silicon film transistor.
See Fig. 4, Fig. 4 is the pick-up unit 10 of the present embodiment and the connection diagram of touch-control display panel 20, it should be noted that, with 4 data lines in the present embodiment, the touch-control display panel of 4 sweep traces is described pick-up unit, therefore can adopt with short bar 101 (shortingbarR), 102 (shortingbarG), 103 (shortingbarB) drive the data line (described red sub-pixel unit comprises sub-pixel unit switch and pixel electrode R) be connected with red sub-pixel unit respectively, detection signal is applied to give corresponding pixel electrode respectively with the data line that green sub-pixels unit (described green sub-pixels unit comprises sub-pixel unit switch and pixel electrode G) connects and with the data line that blue subpixels unit (described blue subpixels unit comprises sub-pixel unit switch and pixel electrode B) is connected, short bar 105 drives odd line interlace line, short bar 106 drives even number line sweep trace, to open sub-pixel unit switch.And described pick-up unit also can carry out driving data line by a short bar in another embodiment, to apply detection signal to all pixel electrodes; Another short bar drives sweep trace, to open all sub-pixel unit switches; Also driving data line can be carried out by a short bar in another embodiment, to apply detection signal to all pixel electrodes; The short bar corresponding with sweep trace number drives sweep trace, to open all sub-pixel unit switches; Therefore, the radical of short bar can by driving the radical of the mode of sweep trace and sweep trace, adopting which kind of mode driving data line to decide.In actual applications, the radical of short bar should be determined according to specific circumstances.
As shown in Figure 4, data line DATA1, DATA2, DATA3 and DATA4 that touch-control display panel 20 comprises substrate (not shown) and is located thereon, sweep trace G1, G2, G3 and G4.Data line and sweep trace define multiple subpixel area, as data line DATA3 and data line DATA4 and sweep trace G2 and G3 defines blue subpixel areas 115, each subpixel area comprises a sub-pixel unit switch and pixel electrode, the sweep trace that described sub-pixel unit switch is adjacent respectively, data line are electrically connected, the sweep trace G2 that grid as sub-pixel unit switch 111 is adjacent is connected, the source electrode of sub-pixel unit switch 111 is connected with data line DATA1, and drain electrode is connected with pixel electrode R.The sub-pixel unit switch that pixel electrode R, G, B of each sub-pixel unit are corresponding with it is respectively electrically connected, and e.g., pixel electrode R is connected with the drain electrode of sub-pixel unit switch 111.
Touch-control display panel 20 also comprises touch detection line 112, touches terminal 108 and touch detector switch 109, touches terminal 108 and is electrically connected by touch detector switch 109 and touch detection line 112.In the present embodiment, touch terminal 108, touch detector switch 109 is all positioned at blue subpixel areas 115, in other embodiments, touch terminal 108, touch detector switch 109 also can be positioned at other subpixel area.
Continue with reference to figure 4, for pick-up unit 10, short bar 101 (shortingbarR) is for driving the data line DATA1 be connected with red sub-pixel unit in touch-control display panel 20 and data line DATA4, short bar 102 (shortingbarG) is for driving the data line DATA2 be connected with green sub-pixels unit, short bar 103 (shortingbarB) is for driving the data line DATA3 be connected with blue subpixels unit, short bar 105 is for driving odd line interlace line G1 and G3, and short bar 106 is for driving even number line sweep trace G2 and G4.Gauge tap 110 is controlled by thread switching control 104, and is connected with touch detection line 112 and data line DATA4 respectively, and in the present embodiment, gauge tap 110 is thin film transistor (TFT), and gauge tap 110 can be polycrystalline SiTFT or amorphous silicon film transistor.The grid of gauge tap 110 is connected with thread switching control 104, and the source electrode of gauge tap 110 is connected with touch detection line 112, and the drain electrode of gauge tap 110 is connected with data line DATA4.
In the present embodiment, owing to touching terminal 108, touch detector switch 109 is positioned at blue subpixel areas 115, therefore by gauge tap 110, the data line DATA4 nearest with it is electrically connected, in another embodiment, touch terminal, touch the subpixel area that detector switch can be positioned at other, be still electrically connected by the data line that gauge tap is nearest with it.As: touch terminal, touch detector switch is positioned at green subpixel areas, then touch detection line and be electrically connected by gauge tap and data line DATA3.In another embodiment, touch detection line to be electrically connected by gauge tap and nearlyer data line.As: if touch terminal, touch detector switch are positioned at blue subpixel areas, touching detection line can be electrically connected by gauge tap and data line DATA3.It should be noted that, touch detection line and with any bar data line be connected actually, depend on and touch terminal, touch position residing for detector switch, in general, tend to by touch detection line by gauge tap be electrically connected from its closer data line.
By pick-up unit 10 is carried out above-mentioned corresponding electric connection to touch control display apparatus 20, just can there is foreign matter between terminal and public electrode or the too high touch detection line short circuit caused of touch lug detects in touch control display apparatus owing to touching, to how using the pick-up unit of the present embodiment to detect the phenomenon touching detection line short circuit being described in detail below.
The detection method of carrying out touch detection line short-circuit detecting with pick-up unit described above of the specific embodiment of the invention, for detecting the short circuit between the touch terminal of described touch-control display panel and public electrode, described detection method comprises the steps:
Voltage is applied to the public electrode of described touch-control display panel;
The short bar being connected to sweep trace to described and thread switching control apply high voltage to open each sub-pixel unit switch and gauge tap;
By the short bar being connected to data line, detection signal is applied to each pixel electrode;
According to the line defect of described touch-control display panel, judge whether to there is the short circuit of touch detection line.
For the ease of understanding, the present embodiment carries out corresponding explanation to the circuit diagram that touch-control display panel connects to method for detecting short circuit with the pick-up unit shown in Fig. 5.
In the present embodiment still for choose 4 sweep traces in touch-control display panel, 4 data lines, 1 touch the detection method of detection line to the present embodiment and be described.
In order to just the position of short circuit between the public electrode of touch-control display panel 20 and touch terminal be detected in the box stage processed, pick-up unit 10 is carried out corresponding electric connection to touch-control display panel 20, as shown in Figure 5: calibrating terminal 1,2,3,5,6 is connected with the short bar 101,102,103,105,106 in pick-up unit 10 respectively, calibrating terminal 4 is connected with thread switching control 104, for external voltage is transferred to corresponding short bar and thread switching control.Particularly:
Short bar 101 (shortingbarR) connects with the data line DATA1 and data line DATA4 being connected red sub-pixel unit, short bar 102 (shortingbarG) be connected that the data line DATA2 that green sub-pixels unit connects connects, short bar 103 (shortingbarB) be connected that the data line DATA3 that blue subpixels unit connects connects, short bar 105 (shortingbarR) is connected with odd line interlace line G1 with G3, short bar 106 (shortingbarR) is connected with even number line sweep trace G2 with G4.Touch detection line 112 to be connected with data line DATA4 by gauge tap 110.
Now be shown as example with Chang Bai, composition graphs 5 and the detection method of Fig. 6 to the present embodiment are described simultaneously.With reference to the process flow diagram that figure 6, Fig. 6 is the present embodiment detection method, the detection method of the present embodiment comprises the steps:
First perform step S11, voltage is applied to the public electrode of touch-control display panel.The voltage in the present embodiment, public electrode applied is 0 volt.
Then perform step S12, the short bar being connected to sweep trace to described and thread switching control apply high voltage to open each sub-pixel unit switch and gauge tap, apply detection signal by the short bar being connected to data line to each pixel electrode.
Particularly, high voltage is applied to open each sub-pixel unit switch to the short bar 105,106 being connected to sweep trace by calibrating terminal 5,6, apply high voltage to open gauge tap 110 by calibrating terminal 4 to thread switching control 104, in the present embodiment high voltage is applied to short bar 105,106 and thread switching control 104 and be generally 15V to ensure that each sub-pixel unit switch and gauge tap 110 are opened; Calibrating terminal 1,2,3 applies detection signal by short bar 101, short bar 102, short bar 103 to each pixel electrode.
It should be noted that, directly opening gauge tap 110 in this step is carry out when tentation data line DATA4 does not exist line defect, if whether defective data line DATA4 situation be unknown, then need first to detect data line DATA4, and after repairing the data line DATA4 that defect occurs, then carry out touching the short-circuit detecting between terminal 108 and public electrode.Relevantly how line defect is carried out to data line DATA4 and detect and will illustrate accordingly follow-up.
Perform step S13, according to the display situation of described touch-control display panel, judge whether to there is short circuit.Particularly, by applying detection signal to the unlatching of sub-pixel unit switch, gauge tap with to each pixel electrode in step S12, if now touch between terminal 108 and public electrode and there is no short circuit, then touch-control display panel 20 presents black picture, if there is short circuit, then touch-control display panel 20 there will be line defect, can at the bright line of DATA4 place display redness in the present embodiment.This is because, if touch between terminal 108 and public electrode and there is short circuit, then the voltage of public electrode can be transferred to by foreign matter and touch terminal 108, and touch detection line 112 be by touch detector switch 109 with touch terminal 108 be connected, therefore the voltage of public electrode by touch terminal 108 transmit give touch detection line 112; Touch detection line 112 to be connected with data line DATA4 by gauge tap 110, under the state that gauge tap 110 is opened, the voltage of public electrode gives data line DATA4 by touching detection line 112 transmission again, voltage on such data line DATA4 will close to public electrode voltages, because data line DATA4 is connected with red sub-pixel unit, in the display frame of black, thus present red bright line.By the judgement of the line defect of red bright line demonstrated on black display picture, can draw to there is short circuit between the touch terminal 108 of touch-control display panel and public electrode.
After determining and there is short circuit between the touch terminal 108 of touch-control display panel and public electrode, the position that namely have found short circuit is to touch terminal 108 place.And, the data line DATA4 be connected with red sub-pixel unit can be found by the red bright line that display panel shows, and then the touch detection line 112 that is connected with data line DATA4 can be determined.In order to eliminate this short circuit phenomenon, in the present embodiment, adopting the mode of radium-shine cutting, from the back side of touch-control display panel, touch detection line 112 being cut off, see Fig. 5, can in the drawings 113 position cut off.After touch detection line 112 is cut-off, any effect is no longer played for touch-control display panel.And, the judgement to touch location can't be affected after touch detection line 112 is cut-off, this mainly because: during finger presses touch-control display panel, the touch detection line that the area of finger presses surrounds not only only has cut-off that, also has the touch detection line of all the other normal non-short circuits, therefore, cut off and touch after detection line 112, on the judgement of follow-up touch-control display panel touch location without any impact.
It should be noted that, in the present embodiment, touching detection line is be connected with data line DATA4 by gauge tap 110, and then whether occurs red bright line to judge touching between terminal and public electrode whether be in short circuit by the display frame judging touch-control display panel.If touch detection line and be connected with data line DATA3 or data line DATA2 by gauge tap, then can by judging whether the display frame of touch-control display panel occurs the bright line of blueness or green judges to touch between terminal and public electrode whether be in short circuit.
In addition, the present embodiment is shown as example with Chang Bai to illustrate accordingly, if be shown as example with often black, then still on public electrode, apply voltage, by calibrating terminal 4, 5, 6 respectively to thread switching control 104, short bar 105, short bar 106 applies high voltage to open gauge tap 110 and each sub-pixel unit switch, by calibrating terminal 1, 2, 3 apply detection signal to each pixel electrode, now touch-control display panel 20 presents white picture, if now touch between terminal 108 and public electrode and there is short circuit, then on white picture, there will be corresponding concealed wire.Namely can by whether to there is concealed wire to judge touching between terminal and public electrode whether short circuit to the white picture of touch-control display panel.
Be shown as example with Chang Bai below to illustrate accordingly data line detection.
As mentioned above, if data line DATA4 is in intact, then directly can carry out short-circuit detecting to described touch-control display panel, but in real process, need first whether have line defect to judge accordingly to data line DATA4.Below, for normal white display mode, the line defect detection method of data line DATA4 is described.
First, voltage is applied to the public electrode of described touch-control display panel 20; High voltage is applied to the described short bar being connected to sweep trace, to open each sub-pixel unit switch, by the described short bar being connected to data line, detection signal is applied to each pixel electrode; Low-voltage is applied to close described gauge tap to described thread switching control.
High voltage is applied, as being 15 volts, to ensure to open each sub-pixel unit switch by calibrating terminal 5,6 to short bar 105,106 in the present embodiment; Detection signal is applied to each pixel electrode by short bar 101,102,103; Then, by calibrating terminal 4, low-voltage is applied to described thread switching control 104, to close described gauge tap 110.
The object of above-mentioned two steps makes touch-control display panel present black picture, and then by the observation to touch-control display panel display situation, judge whether touch-control display panel exists the line defect of data line.The present embodiment is connected with data line DATA4 by gauge tap 110 due to touch detection line 112, therefore, needs first to judge whether data line DATA4 has line defect.Can be known by above-mentioned, data line DATA4 is connected with red sub-pixel unit, namely data line DATA4 is connected with the pixel electrode R of red sub-pixel unit by sub-pixel unit switch, therefore, if there is open circuit in data line DATA4, then the pixel electrode R of data line DATA4 and red sub-pixel unit is all in floating, pixel electrode R can not add voltage, in this position because upper and lower electric field cannot be formed the bright line that takes on a red color, if there is open circuit in data line DATA4, due to the effect of liquid crystal capacitance coupling, the current potential of pixel electrode R can be made consistent with the current potential of public electrode, therefore, display panel also there will be red bright line.
Therefore, if when adopting above-mentioned two steps to make touch-control display panel present black picture, red bright line appears in black picture, then can judge to there is line defect with the data line DATA4 corresponding to red sub-pixel unit, and then it is repaired.It should be noted that, be described for normal white mode time in the present embodiment, under normal black pattern, if the display frame of white presents concealed wire, then illustrate and occur that the data line that the sub-pixel unit of concealed wire connects exists line defect.After the open circuit of data line DATA4 is repaired, just can the short circuit between the touch terminal of above-mentioned touch-control display panel and public electrode be detected accordingly.
The pick-up unit that the embodiment of the present invention provides, is only made up of short bar, thread switching control and gauge tap, and structure is simple, and the design space occupied is less.The Comparison between detecting methods that the embodiment of the present invention provides is simple, and can judge location of short circuit exactly, and then repairs touch-control display panel, improves the yield of product.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection domain of technical solution of the present invention.
Claims (11)
1. a pick-up unit, for carrying out touch detection line short-circuit detecting to touch-control display panel, multi-strip scanning line, data line and touch detection line that described touch-control display panel comprises substrate and formed on the substrate, it is characterized in that, described pick-up unit comprises: short bar, thread switching control, the gauge tap corresponding respectively with described touch detection line, wherein
Described short bar is connected with described data line, sweep trace; Wherein, described short bar comprises the short bar be connected with odd line interlace line, the short bar be connected with even number line sweep trace;
Described gauge tap is by described switch control rule line traffic control, and when described gauge tap is opened, the touch detection line corresponding with it is communicated with data line by described gauge tap.
2. pick-up unit as claimed in claim 1, it is characterized in that, described gauge tap is thin film transistor (TFT), and the grid of wherein said thin film transistor (TFT) is connected with described thread switching control, and the source electrode of described thin film transistor (TFT) is connected with data line with described touch detection line respectively with drain electrode.
3. pick-up unit as claimed in claim 1, is characterized in that, described in be connected to the touch detection line of same gauge tap adjacent with data line.
4. pick-up unit as claimed in claim 1, it is characterized in that, described touch-control display panel also comprises multiple redness, green, blue subpixels unit; Described short bar comprises the short bar that the data line that is connected with red sub-pixel unit is connected, the short bar that the data line is connected with green sub-pixels unit is connected, and the short bar that the data line be connected with blue subpixels unit is connected.
5. pick-up unit as claimed in claim 1, is characterized in that, also comprise the calibrating terminal be connected with described short bar.
6. utilizing a method for detecting short circuit for pick-up unit described in any one of claim 1 ~ 5, for detecting the short circuit between the touch terminal of described touch-control display panel and public electrode, it is characterized in that, described detection method comprises the steps:
To the described short bar and the thread switching control applying high voltage that are connected to sweep trace, to open each sub-pixel unit switch and gauge tap; Wherein, short bar drives odd line interlace line, and short bar drives even number line sweep trace;
By the short bar being connected to data line, detection signal is applied to each pixel electrode;
According to the line defect of described touch-control display panel, judge whether to there is the short circuit of touch detection line.
7. detection method as claimed in claim 6, is characterized in that, the described line defect according to described touch-control display panel, judges whether to exist to touch detection line short circuit, comprising:
Under normal white mode, touch-control display panel shows black picture or grey picture, if bright line appears in touch-control display panel, then it is determined that the presence of and touches detection line short circuit;
Or under normal black pattern, touch-control display panel shows white picture or grey picture, if concealed wire appears in touch-control display panel, then it is determined that the presence of and touch detection line short circuit.
8. detection method as claimed in claim 7, it is characterized in that, also comprise and will detect that the touch detection line of short circuit cuts off, described in the touch detection line of short circuit that detects refer to the touch detection line be connected to the data line of the sub-pixel unit be connected to corresponding to described bright line or concealed wire in a gauge tap.
9. detection method as claimed in claim 8, is characterized in that, described in be cut to and adopt the mode of radium-shine cutting by the described touch detection line cut-out detected.
10. detection method as claimed in claim 6, is characterized in that, also comprise: before described short-circuit detecting, carry out line defect detection to the data line of described touch-control display panel.
11. detection methods as claimed in claim 10, it is characterized in that, the described data line to described touch-control display panel carries out line defect detection, specifically comprises the steps:
Voltage is applied to the public electrode of described touch-control display panel;
High voltage is applied to the described short bar being connected to sweep trace, to open each sub-pixel unit switch, by the described short bar being connected to data line, detection signal is applied to each pixel electrode;
Low-voltage is applied, to close described gauge tap to described thread switching control;
According to the display situation of described touch-control display panel, judge whether the line defect that there is data line.
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| CN201010524414.6A CN102455960B (en) | 2010-10-28 | 2010-10-28 | Detection device and detection method |
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| CN102455960B true CN102455960B (en) | 2016-03-16 |
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| CN104077989B (en) * | 2014-06-30 | 2016-04-13 | 深圳市华星光电技术有限公司 | Display panel |
| CN104183206B (en) * | 2014-09-10 | 2017-04-19 | 南京中电熊猫液晶显示科技有限公司 | Display panel detecting method |
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| CN104536609B (en) * | 2014-12-30 | 2018-01-30 | 深圳市华星光电技术有限公司 | Display panel and fault detection method with touch controllable function |
| CN104699347B (en) * | 2015-04-01 | 2017-05-31 | 上海中航光电子有限公司 | A kind of array base palte, display panel and electronic equipment |
| CN105093593B (en) * | 2015-09-11 | 2018-10-30 | 京东方科技集团股份有限公司 | Display base plate and its test method, display device |
| CN105335003B (en) * | 2015-10-10 | 2018-09-04 | 深圳市华星光电技术有限公司 | Touch-control display panel and its touch-control circuit |
| CN106940975A (en) * | 2016-01-04 | 2017-07-11 | 中华映管股份有限公司 | Detection means and detection method |
| CN105511129B (en) * | 2016-01-28 | 2019-07-16 | 厦门天马微电子有限公司 | The test method of display panel, display device and display panel |
| KR102426757B1 (en) * | 2016-04-25 | 2022-07-29 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| CN106054474B (en) * | 2016-05-27 | 2019-05-03 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display panel path monitoring method |
| CN106201069B (en) * | 2016-06-29 | 2019-05-17 | 南京中电熊猫液晶显示科技有限公司 | Embedded touch device and its detection method |
| CN106201076B (en) * | 2016-07-01 | 2019-11-19 | 厦门天马微电子有限公司 | Array substrate and its driving method, display panel and display device |
| US10747041B2 (en) * | 2017-02-15 | 2020-08-18 | Sharp Kabushiki Kaisha | Display device with position input function |
| CN108267668B (en) * | 2018-02-06 | 2020-10-20 | 合肥京东方显示技术有限公司 | Method and device for positioning short circuit point in display panel |
| CN110045223B (en) * | 2019-04-28 | 2021-09-07 | 云谷（固安）科技有限公司 | Display panel, test method thereof and display device |
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