CN105225622B - The defects of self-capacitance contact panel detection means and its detection method - Google Patents
The defects of self-capacitance contact panel detection means and its detection method Download PDFInfo
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- CN105225622B CN105225622B CN201510745474.3A CN201510745474A CN105225622B CN 105225622 B CN105225622 B CN 105225622B CN 201510745474 A CN201510745474 A CN 201510745474A CN 105225622 B CN105225622 B CN 105225622B
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Abstract
The invention discloses detection means the defects of a kind of self-capacitance contact panel and its detection method, the defect detecting device is provided with the multiple drive circuits being connected respectively with multirow touch control electrode, and drive circuit includes：Preliminary filling unit, for being produced as the first charging control signal of each touch control electrode while preset first voltage；Synchronization unit is latched, starts the trigger signal of each drive circuit line by line for storing, and is produced as the second charging control signal that each touch control electrode applies second voltage line by line；Output unit, export first voltage respectively according to charging control signal and touch control electrode is charged with second voltage；End unit, according to voltage control possessed by each row touch control electrode positioned at the open and close in the main charge control path of the touch control electrode of a line before the row touch control electrode.The present invention can further detect the situation for being present in the circuit defect in touch control electrode matrix between each row touch control electrode, simple in construction, and reliability is high.
Description
Technical field
The present invention relates to display technology field, more particularly to detection means the defects of a kind of self-capacitance contact panel, also relate to
A kind of and detection method using the defect detecting device.
Background technology
With the rapid development of Display Technique, touch-screen is gradually in the life of people.At present, embedded touch
Screen (In Cell Touch Panel) can embed touch-control part to display screen, and module entirety can be both thinned in this
Thickness, the cost of manufacture of touch-screen can be substantially reduced again.Therefore In-cell touch panel receives the favor of major panel manufacturer,
The detection mode of In-cell touch panel also turns into the focus of research simultaneously.
For self-capacitance In-cell touch panel of the prior art, generally by operable area (AA, Active Area)
Public electrode be divided into block of cells as touch control electrode.Each touch control electrode is connected by sensing signal line (i.e. Rx signal wires)
To the pin of touch-control circuit output end.In the display stage, touch-control circuit is write public by Rx signal wires to each touch control electrode
Electrode voltage.At present connection touch control electrode Rx signal wires be all through AA areas, can occur in processing procedure Rx signal wires with it is non-
The situation of the public electrode short circuit of corresponding touch control electrode.In the prior art typically using the self-capacitance contact panel shown in Fig. 1
Defect detecting device detects above-mentioned short-circuit conditions.
Reference picture 1, in existing detection means, the Rx of odd column is connected to TPDO data wires, the Rx signals of even column
Line is connected to TPDE data wires.In detection, first by controlling TFT switch device (to be opened by each TFT of TPSW signal line traffic controls
Close the conducting and closing of device 20) carry out touch control electrode write-in different potentials corresponding to odd, even ordered series of numbers Rx signal wires, then pass through
Observation display picture is short-circuit to detect whether there is a situation where Rx signal wires and public electrode.For example, first to odd number during detection
Touch control electrode write-in 4.5V current potentials corresponding to Rx signal wires are arranged, 0V electricity is write to touch control electrode corresponding to even column Rx signal wires
Position, the data wire all to AA areas write 4.5V signal.Touch control electrode block 10 should so corresponding to odd column Rx signal wires
Black picture is shown, touch control electrode block 10 corresponding to even column Rx signal wires should show white picture.Then observation display effect
Fruit, if touch control electrode block 10, picture is not shown as expected, then illustrates that the public electrode of this block is believed with the Rx of certain one-level
Short circuit occurs for number line.
It can be seen that the defects of above-mentioned detection device, is：The device can only detect the short-circuit feelings between odd column and even column
Condition, and specifically which root Rx signal wire can not be detected there occurs short circuit with public electrode.
The content of the invention
The technical problems to be solved by the invention are：The defects of self-capacitance contact panel of the prior art detection means only
The short-circuit conditions between odd column and even column can be detected, and specifically which root Rx signal wire can not be detected and sent out with public electrode
Short circuit is given birth to.
In order to solve the above-mentioned technical problem, the invention provides detection means the defects of a kind of self-capacitance contact panel and its
Detection method.
According to an aspect of the invention, there is provided a kind of the defects of self-capacitance contact panel detection means, it is provided with
The multiple drive circuits to be connected one to one respectively with multirow touch control electrode, the drive circuit are included by latch in sequential series
The main charge control path and the preliminary filling unit by being connected to each other and institute that synchronization unit, cut-off unit and output unit are formed
The auxiliary charge control path of output unit composition is stated, wherein：
The preliminary filling unit, it is arranged to be produced as the first charge control letter of each touch control electrode while preset first voltage
Number；
The latch synchronization unit, the trigger signal that storage is used to start each drive circuit line by line is arranged to, and be produced as
Each touch control electrode applies the second charging control signal of second voltage line by line；
The output unit, it is arranged to be controlled by first charging control signal and comes to described in touch control electrode output
First voltage, it is controlled by second charging control signal to export the second voltage to the touch control electrode；
The cut-off unit, is arranged to the voltage according to possessed by each row touch control electrode, and control is located at the row touch control electrode
The above open and close in the main charge control path of the drive circuit corresponding to the touch control electrode of a line；
Also, the latch synchronization unit includes first switching element, second switch element, the first phase inverter, second anti-
Phase device and the 3rd phase inverter, the first switching element and the second switch element are controlled by same clock signal, described
The input connection trigger signal input of first switching element, the output end of the first switching element connect described the simultaneously
The output end of the input of one phase inverter and the second phase inverter, the output end of first phase inverter, second phase inverter
The input of input and the 3rd phase inverter is all connected with the input of the second switch element, the second switch element it is defeated
The output end for going out end and the 3rd phase inverter is all connected with the input for ending unit；The first switching element is in and led
During logical/cut-off state, the second switch element is in cut-off/conducting state.
Preferably, the first switching element is PMOS transistor, and the second switch element is nmos pass transistor；
Or
The first switching element is nmos pass transistor, and the second switch element is PMOS transistor.
Preferably, behind the output end connection of the latch synchronization unit of drive circuit corresponding to previous row touch control electrode
The input of the latch synchronization unit of drive circuit corresponding to a line touch control electrode.
Preferably, the cut-off unit includes the 3rd switch element；When drive circuit corresponding to previous row touch control electrode
Output unit output end connection above drive circuit corresponding to a line touch control electrode cut-off unit the 3rd switch element
Control terminal.
Preferably, the main charge control path is opened by the first voltage, and is closed by the second voltage
Close.
Preferably, the preliminary filling unit includes the 4th switch element, and its control terminal connects initial control signal input,
Its input connects original trigger signal input, and its output end connects the input of the output unit.
Preferably, the output unit includes the 4th phase inverter, the 5th phase inverter and signal transmission gate, and the cut-off is single
The output end of member passes sequentially through the first control that the 4th phase inverter connects the signal transmission gate with the 5th phase inverter
End, the output end of the cut-off unit connects the second control terminal of the signal transmission gate by the 4th phase inverter, described
The input connection touching signals input of signal transmission gate, the output end connection touch control electrode of the signal transmission gate.
According to another aspect of the present invention, there is provided one kind is using the detection means such as the defects of above-mentioned self-capacitance contact panel
Detection method, it includes：
Each pixel electrode in the self-capacitance contact panel region is charged to tertiary voltage；
Each touch control electrode is charged to first voltage simultaneously using the preliminary filling unit, to open corresponding to each touch control electrode
The main charge control path of drive circuit；
Each touch control electrode is charged to second voltage line by line using the latch synchronization unit；
Circuit defect is judged whether according to the display picture corresponding to each row touch control electrode block.
Preferably, circuit defect is judged whether according to the display picture corresponding to each row touch control electrode block,
Including：
When the test pictures corresponding to certain row touch control electrode block do not show default picture, it is determined that row touch-control electricity
Pole and its before at least a line and/or between a line touch control electrode circuit defect be present below.
Preferably, the tertiary voltage is equal to the first voltage.
Compared with prior art, one or more of such scheme embodiment can have the following advantages that or beneficial to effect
Fruit：
The present invention can further detect to be present in the circuit defect in touch control electrode matrix between each row touch control electrode
Situation, and the apparatus structure is simple, and reliability is high.
Other advantages, the target of the present invention, and feature will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.The target and other advantages of the present invention can be wanted by following specification, right
Specifically noted structure is sought in book, and accompanying drawing to realize and obtain.
Brief description of the drawings
Accompanying drawing is used for providing to the technical scheme of the application or further understanding for prior art, and constitution instruction
A part.Wherein, the accompanying drawing for expressing the embodiment of the present application is used for the technical side for explaining the application together with embodiments herein
Case, but do not form the limitation to technical scheme.
Fig. 1 shows the schematic diagram of the defects of self-capacitance contact panel in the prior art detection means；
Fig. 2 shows the schematic diagram of the defects of self-capacitance contact panel of embodiment of the present invention detection means；
Fig. 3 shows the enlarged diagram of the regional area S in Fig. 2；
Fig. 4 shows the functional-block diagram of drive circuit in the embodiment of the present invention；
Fig. 5 shows the circuit diagram of drive circuit in the embodiment of the present invention；
Fig. 6 shows the detection timing diagram of defect detecting device of the embodiment of the present invention；And
Fig. 7 shows the schematic flow sheet of the detection method using defect detecting device of the embodiment of the present invention.
Embodiment
Embodiments of the present invention are described in detail below with reference to drawings and Examples, and how the present invention is applied whereby
Technological means solves technical problem, and the implementation process for reaching relevant art effect can fully understand and implement according to this.This Shen
Each feature that please be in embodiment and embodiment, can be combined with each other under the premise of not colliding, the technical scheme formed
Within protection scope of the present invention.
The technical problems to be solved by the invention are：The defects of self-capacitance contact panel of the prior art detection means only
The short-circuit conditions between odd column and even column can be detected, and specifically which root Rx signal wire can not be detected and sent out with public electrode
Short circuit is given birth to.In order to solve the above technical problems, the embodiments of the invention provide dress is detected the defects of a kind of self-capacitance contact panel
Put.
To Fig. 6, the defects of self-capacitance contact panel of the present invention, detection means includes reference picture 2 is arranged on touch control electrode matrix
Multiple drive circuits 30 that 40 edge is connected respectively with multirow touch control electrode, each drive circuit 30 include preliminary filling unit
31st, synchronization unit 34, output unit 32 and cut-off unit 33 are latched.Wherein, synchronization unit 34, cut-off unit 33 and output are latched
Unit 32 is sequentially connected in series to form main charge control path, and preliminary filling unit 31 is connected with output unit 32, forms auxiliary charge control road
Footpath.
Illustrate the concrete structure of drive circuit in the embodiment of the present invention with reference to Fig. 5.
Preliminary filling unit 31 is used for the first charging control signal (Fig. 5 for being produced as each touch control electrode while preset first voltage
Shown in SW signals).Specifically, preliminary filling unit 31 includes the 4th switch element 311, the 4th switch element 311
Signal input part connects the SW signals by original trigger signal input, the GAS signals of control termination initial control signal input.
When GAS signals are high level, the 4th switch element 311 is opened, the signal output part that SW signals pass through the 4th switch element 311
Put on the control signal input of output unit 32 (as shown in the A points in Fig. 5).When GAS signals are low level, the 4th opens
Close element 311 to close, the branch road where it is in high-impedance state, will not have an impact the other parts of drive circuit 30.Pre-
Fill in the presence of the first charging control signal SW signals of unit 31, all touch control electrodes of touch control electrode matrix 40 can be made to exist
Initial time is charged to first voltage.
Latch synchronization unit 34 to be made up of three phase inverters and two switch elements, start each driving electricity line by line for storing
The trigger signal ST on road, and it is produced as the second charging control signal (SE in Fig. 5 that each touch control electrode applies second voltage line by line
Signal).The output end for latching synchronization unit 34 is connected with ending the input of unit 33, is believed by clock signal CK height
Number control the signal of adjacent two-stage to transmit respectively, can according to each row touch control electrode charging sequential (charge sequential line by line) respectively
Touch control electrode for each row is filled with second voltage.
Reference picture 5, latch synchronization unit 34 structure it is simple, only including first switching element 341, the first phase inverter 342,
Second phase inverter 343, the phase inverter 345 of second switch element 344 and the 3rd.The first switching element 341 and described second is opened
Close element 344 and be controlled by same clock signal CK, the input connection trigger signal input of the first switching element 341
End, the output end of the first switching element 341 connect the input and the second phase inverter of first phase inverter 342 simultaneously
343 output end, the output end of first phase inverter 342, the input and the 3rd phase inverter of second phase inverter 343
345 input is all connected with the input of the second switch element 344.The output end of the second switch element 344 and institute
The output end for stating the 3rd phase inverter 345 is all connected with the input of the cut-off unit 33.The first switching element 341 and second
Switch element 344 is respectively PMOS/NMOS transistors and NMOS/PMOS transistors.In the embodiment shown in fig. 5, first open
Pass element 341 is PMOS transistor, and second switch element 344 is nmos pass transistor.In other embodiments, first switching element
341 can also be nmos pass transistor, and now second switch element 344 is PMOS transistor.
When the output end of the latch synchronization unit of drive circuit corresponding to previous row touch control electrode connects a line touch-control below
The input of the latch synchronization unit of drive circuit corresponding to electrode.I.e. with the output end of the latch synchronization unit 34 of the (n-1)th row
Input end signals of the trigger signal ST [n-1] as the latch synchronization unit 34 of line n, and then realize the displacement of trigger signal
Latch.In addition, respectively latching the low level signal of synchronization unit 34 can be pre-set by asynchronous reset end RE.
The operation principle that synchronization unit 34 is latched in embodiment illustrated in fig. 5 is as follows：When previous row ST [n-1] provides a height
After level signal, synchronous that CK signals are set into low level signal, first switching element 341 is opened in Fig. 5, second switch element
344 close.Now, due to the first phase inverter 342 and the interlock function of the second phase inverter 343, ST [n-1] signal is pinned.
CK signals are set to high level signal in next stage, first switching element 341 is closed in Fig. 5, and second switch element 344 is opened
Open.Now, ST [n-1] signals disconnect with the interlocking unit being made up of the first phase inverter 342 and the second phase inverter 343, simultaneously will
Signal in interlocking unit is delivered in ST [n].Then low level signal is set to again in next stage, CK signals, similarly, the
One switch element 341 is opened, and second switch element 344 is closed.Because now ST [n-1] signal has been low potential, latch same
Step unit 34 sets low ST [n].So as to realize the latch of trigger signal, synchronization and transmission.
Output unit 32 receives the first charging control signal output first voltage caused by preliminary filling unit 31, and latches same
The second charging control signal output second voltage caused by unit 34 is walked, then using first voltage or second voltage come to each
Touch control electrode is charged.Specifically, as shown in figure 5, output unit 32 includes the 4th phase inverter 321, the and of the 5th phase inverter 322
Signal transmission gate 323, the output end of the cut-off unit 33 pass sequentially through the 4th phase inverter 321 and the 5th phase inverter
First control terminal of the 322 connection signal transmission gates 323, the output end of the cut-off unit 33 are also anti-phase by the described 4th
Device 321 connects the second control terminal of the signal transmission gate 323, the input connection touching signals of the signal transmission gate 323
Input (touching signals input input RX signals), the output end connection touch control electrode of the signal transmission gate 323.First fills
Electric control signal or the second charging control signal access the control signal input of output unit 32 via A points.When charging is controlled
When signal (SE signals or SW signals) processed is low level, signal transmission gate 323 is opened, and signal Rx exports through signal transmission gate 323
To touch control electrode.When charging control signal is high level, signal transmission gate 323 is closed, and the voltage of touch control electrode remains unchanged.
Herein, signal Rx is the voltage signal with first voltage or second voltage.
Cut-off unit 33 is used for the conducting and closing for controlling main charge control path.When the touch control electrode of certain a line is electrically charged
For second voltage when, the cut-off unit 33 of the drive circuit corresponding to touch control electrode positioned above a line will close driving electricity
The main charge control path on road.Specifically, as shown in figure 5, cut-off unit 33 includes the 3rd switch element 331, the 3rd
Switch element 331, which is connected in series in, to latch between synchronization unit 34 and output unit 32, i.e., it is synchronous single to connect latch for its signal input part
The output end of member 34, its signal output terminate the control signal input of output unit 32, and the 3rd switch element 331 provides the
Transmission path of the one charging control signal SE signals to output unit 32.
Further, the control terminal of the 3rd switch element 331 and the output end of the output unit of next stage drive circuit connect
Connect.That is, positioned at line n the 3rd switch element 331 as the drive circuit corresponding to the touch control electrode of the (n+1)th row output signal
Out [n+1] is controlled.When Out [n+1] is high level, the transmission path conducting of SE signals to output unit 32, in SE signals
Under effect, it is that the row touch control electrode is charged that output unit 32, which exports second voltage,.When Out [n+1] is low level, SE letters
Number closed to the transmission path of output unit 32, the row touch control electrode can not be electrically charged, and be maintained first voltage.It is single by ending
The blocking effect of member 33, [n+1] row touch control electrode block and the display picture corresponding to [n] row touch control electrode block can be made
Face shows difference, and can take this to further determine that the position of circuit defect.
The embodiment of the present application the defects of in detection means, the connected mode of each horizontal drive circuit 30 is as shown in figure 3, corresponding
One drive circuit 30 is set in every row touch control electrode, the output signal of the output unit 32 of each drive circuit 30, which is fed back to, to be located at
The control signal of the cut-off unit 33 of the drive circuit 30 of a line before it, each output end for latching synchronization unit 34 respectively with
Input positioned at the latch synchronization unit 34 of a line behind is connected.The latch of drive circuit corresponding to each row touch control electrode
Synchronization unit 34 is all connected with clock signal CK.The control terminal of the preliminary filling unit 31 of each drive circuit 30 and signal input part, each drive
The asynchronous reset end RE of the latch synchronization unit 34 of dynamic circuit 30 connects together respectively.
The defects of the embodiment of the present application, detection means can realize following functions, be each touch control electrode preset first electricity simultaneously
Pressure, apply second voltage line by line for each touch control electrode.Each drive circuit is started by the trigger signal ST [0] of initial time line by line
Detected.When causing the touch control electrode positioned at back row due to circuit defect the is charged to prior to the touch control electrode before it
During two voltage, the main charge control path of previous row touch control electrode is closed, it is remained first voltage.With reference to Fig. 6's
Timing diagram describes said process in detail.
Firstly, it is necessary to line precharge first is entered to drive circuit 30 to open the main charge control path of each row touch control electrode.
4th switch element 311 is opened by the high level of GAS signals, SW signals is kept low level, and then transmit signal
Door 323 is turned on, and Rx signals are exported by signal transmission gate 323, and the touch control electrode to being driven by signal transmission gate 323 is filled
Electricity.It is high level to make Rx signals between the low period of SW signals, and each row touch control electrode bulk charge can be made such as to scheme to high level
Shown in Out [1], Out [2] and Out [3] in 6.Because the voltage of each touch control electrode is high level, so the per a line
Three switch elements 331 are opened, i.e., the main charge control path of all touch control electrodes is in the state of conducting.
Then, signal transmission gate 323 is adjusted to stable closed mode.It is divided into two steps, is opened in the 4th switch element 311
During opening, SW signals is changed into high level and carry out shutdown signal transmission gate 323, then will be latched together by negative pulse reset signal RE
Step unit 34 resets.VGH high level signals make the output end of each latch synchronization unit 34 be low level, such as the ST [1] in Fig. 6
With ST [2] Suo Shi.ST [1] and ST [2] is transferred to the control signal input of output unit 32 by ending unit 33, makes signal
Transmission gate 323 is closed, and therefore, after GAS returns to low level, signal transmission gate 323 still may be at stable closed mode.
Next, the signal for controlling adjacent two-stage respectively by clock signal CK high-low signal transmits, so as to make step by step
Often row touch control electrode is charged to second voltage.
The defect inspection device is can be seen that without complicated scan mode from the above-mentioned course of work, need to only be carried out corresponding
Initial setting up, it is possible to the defects of touch control electrode, is being detected in the presence of trigger signal and clock signal, test letter
Number simple easily to implement, reliability is higher.
The method of defects detection is carried out as shown in fig. 7, the party using monitoring device the defects of above-mentioned self-capacitance contact panel
Method comprises the following steps：
Step S1：Each pixel electrode in self-capacitance contact panel region is charged to tertiary voltage.
Step S2：Each touch control electrode is charged to first voltage to open each touch control electrode simultaneously using preliminary filling unit 31
Main charge control path.
Step S3：Each touch control electrode is charged to second voltage line by line using synchronization unit 34 is latched.
Step S4：Circuit defect is judged whether according to the display picture corresponding to each row touch control electrode block.Tool
Body：
First, by from all data wires (data lines) in electric touch control operation region that each pixel in the region is electric
Pole is charged to tertiary voltage, such as 4.5V.Then, first voltage then by each touch control electrode is charged to, first voltage can be with
Three voltages are equal, i.e., first voltage is also taken as 4.5V.Charging to pixel electrode can pass through the driving electricity of liquid crystal display panel
Road complete, to touch control electrode charging then can by it is above-mentioned the defects of monitoring device precharge sequential complete.Due to touch-control
Electrode is set with common electrode layer with layer, therefore when pixel electrode is equal with voltage possessed by touch control electrode, IPS liquid crystals
Show in device and be shown as black with the initial picture corresponding to each row touch control electrode block.Further, in the effect of first voltage
Under, the main charge control path of each row touch control electrode is opened.
Next, start line by line to apply each touch control electrode second voltage, such as 0V, each pixel before not being electrically charged
Electrode is still maintained at tertiary voltage, and said process can be completed by detection sequential of the defect inspection device after t.By
Opening is in the main charge control path of each drive circuit, therefore each row touch control electrode can be charged to successively
After 0V, the picture that its corresponding block is shown will become white picture.Sent out if having between the touch control electrode do not gone together and signal wire
Raw circuit defect, then the position of defect can be determined according to the situation that display picture changes.
Specifically, when the picture corresponding to certain row or a few row touch control electrode blocks does not show default picture, then sentence
Break at least a line and/or between a line touch control electrode circuit defect to be present below before the row touch control electrode and its.Citing and
Speech, it is assumed that with the touch control electrode positioned at the 4th row short circuit occurs for the signal wire positioned at the touch control electrode of the 1st row, then to the 1st row
Touch control electrode that can be simultaneously to the 4th row during touch control electrode charging charges.And after the touch control electrode of the 4th row is charged to 0V, will
The main charge control path of the 3rd row touch control electrode is caused to be closed, therefore, the 3rd row touch control electrode cannot be charged to specified
0V, be maintained as black with the picture corresponding to the 3rd row touch control electrode block, and then according to the display feelings of above-mentioned picture
Condition, it may be determined that the 4th row may be with certain a line in the 1st row, the 2nd row or the 3rd row or a few row touch control electrodes (or touch control electrode
Signal wire) there occurs short circuit.
For another example when circuit defect is present between the 3rd row touch control electrode and the 4th row touch control electrode, the 3rd row touch-control electricity
Pole will start simultaneously at charging with the 4th row touch control electrode, will be by the 3rd when the voltage of the 4th row touch control electrode increases to certain value
Capable cut-off unit 33 closes the main charge control path of the 3rd row touch control electrode, and now the 3rd row touch control electrode is not electrically charged also
To the second voltage of setting, thus block corresponding to the 3rd row touch control electrode can show between white picture and black picture it
Between grey screen, you can to judge the existing defects between two adjacent rows.
It should be noted that it is determined that drawbacks described above occur scope after, be specifically which row touch control electrode (or touch-control electricity
Pole and the signal wire of touch control electrode) between there occurs short circuit, can be carried out in the range of having determined further detection with
Eliminate defect.
It is also to be noted that in the above-described embodiments, for the ease of operation, first voltage and tertiary voltage are taken respectively
For 4.5V, second voltage is taken as 0V, the difference of such picture is more notable, is advantageous to observe the difference between picture.Certainly
First voltage, second voltage and tertiary voltage can also be taken as to the value of other settings, as long as guaranteeing to pass through first voltage
The conducting and closing in main charge control path are controlled with the value of second voltage.First voltage and tertiary voltage can also be taken
For different values, may be incorporated for realizing the present invention.
Although disclosed herein embodiment as above, described content only to facilitate understand the present invention and adopt
Embodiment, it is not limited to the present invention.Any those skilled in the art to which this invention pertains, this is not being departed from
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of the defects of self-capacitance contact panel detection means, it is provided with what is connected one to one respectively with multirow touch control electrode
Multiple drive circuits, the drive circuit include being made up of latch synchronization unit in sequential series, cut-off unit and output unit
Main charge control path and the auxiliary charge control path that forms of the preliminary filling unit by being connected to each other and the output unit,
Wherein：
The preliminary filling unit, it is arranged to be produced as the first charging control signal of each touch control electrode while preset first voltage；
The latch synchronization unit, the trigger signal that storage is used to start each drive circuit line by line is arranged to, and is produced as each touch
Control electrode applies the second charging control signal of second voltage line by line；
The output unit, it is arranged to be controlled by first charging control signal to export described first to the touch control electrode
Voltage, it is controlled by second charging control signal to export the second voltage to the touch control electrode；
The cut-off unit, the voltage according to possessed by each row touch control electrode is arranged to, control is before the row touch control electrode
The open and close in the main charge control path of the drive circuit corresponding to the touch control electrode of a line；
Also, the latch synchronization unit includes first switching element, second switch element, the first phase inverter, the second phase inverter
With the 3rd phase inverter, the first switching element and the second switch element are controlled by same clock signal, and described first
The input connection trigger signal input of switch element, it is anti-that the output end of the first switching element connects described first simultaneously
The output end of the input of phase device and the second phase inverter, the input of the output end of first phase inverter, second phase inverter
The input of end and the 3rd phase inverter is all connected with the input of the second switch element, the output end of the second switch element
The input of the cut-off unit is all connected with the output end of the 3rd phase inverter；The first switching element is on/
During cut-off state, the second switch element is in cut-off/conducting state.
2. defect detecting device according to claim 1, it is characterised in that
The first switching element is PMOS transistor, and the second switch element is nmos pass transistor；Or
The first switching element is nmos pass transistor, and the second switch element is PMOS transistor.
3. defect detecting device according to claim 2, it is characterised in that electric when being driven corresponding to previous row touch control electrode
The output end of the latch synchronization unit on road connects the defeated of the latch synchronization unit of drive circuit corresponding to a line touch control electrode below
Enter end.
4. defect detecting device according to any one of claim 1 to 3, it is characterised in that the cut-off unit includes
3rd switch element；When the output end of the output unit of drive circuit corresponding to previous row touch control electrode connects above a line touch-control
The control terminal of 3rd switch element of the cut-off unit of drive circuit corresponding to electrode.
5. defect detecting device according to claim 4, it is characterised in that the main charge control path passes through described
One voltage is opened, and is closed by the second voltage.
6. defect detecting device according to any one of claim 1 to 3, it is characterised in that the preliminary filling unit includes
4th switch element, its control terminal connection initial control signal input, its input connection original trigger signal input, its
Output end connects the input of the output unit.
7. defect detecting device according to any one of claim 1 to 3, it is characterised in that the output unit includes
4th phase inverter, the 5th phase inverter and signal transmission gate, the output end of the cut-off unit pass sequentially through the 4th phase inverter
Connect the first control terminal of the signal transmission gate with the 5th phase inverter, the output end of the cut-off unit passes through described the
Four phase inverters connect the second control terminal of the signal transmission gate, the input connection touching signals input of the signal transmission gate
End, the output end connection touch control electrode of the signal transmission gate.
A kind of 8. detection of the defects of self-capacitance contact panel of use as any one of claim 1 to 7 detection means
Method, including：
Each pixel electrode in the self-capacitance contact panel region is charged to tertiary voltage；
Each touch control electrode is charged to first voltage simultaneously using the preliminary filling unit, to open driving corresponding to each touch control electrode
The main charge control path of circuit；
Each touch control electrode is charged to second voltage line by line using the latch synchronization unit；
Circuit defect is judged whether according to the display picture corresponding to each row touch control electrode block.
9. detection method according to claim 8, it is characterised in that according to the display corresponding to each row touch control electrode block
Picture judges whether circuit defect, including：
When the test pictures corresponding to certain row touch control electrode block do not show default picture, it is determined that the row touch control electrode with
At least a line and/or between a line touch control electrode circuit defect be present below before it.
10. detection method according to claim 8 or claim 9, it is characterised in that the tertiary voltage is equal to the described first electricity
Pressure.
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