CN105225622A - The defect detecting device of self-capacitance contact panel and detection method thereof - Google Patents
The defect detecting device of self-capacitance contact panel and detection method thereof Download PDFInfo
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- CN105225622A CN105225622A CN201510745474.3A CN201510745474A CN105225622A CN 105225622 A CN105225622 A CN 105225622A CN 201510745474 A CN201510745474 A CN 201510745474A CN 105225622 A CN105225622 A CN 105225622A
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Abstract
The invention discloses a kind of defect detecting device and detection method thereof of self-capacitance contact panel, this defect detecting device is provided with the multiple driving circuits be connected respectively with multirow touch control electrode, driving circuit comprises: preliminary filling unit, for generation of the first charging control signal for preset first voltage while of each touch control electrode; Latching lock unit, for storing the trigger pip starting each driving circuit line by line, and being produced as the second charging control signal that each touch control electrode applies the second voltage line by line; Output unit, exports the first voltage respectively according to charging control signal and the second voltage charges to touch control electrode; Cut-off unit, the Control of Voltage had according to each row touch control electrode is positioned at the open and close of the main charging controllability path of the touch control electrode of a line before this row touch control electrode.The present invention can detect the situation of the circuit defect be present in touch control electrode matrix between each row touch control electrode further, and structure is simple, and reliability is high.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of defect detecting device of self-capacitance contact panel, also relate to a kind of detection method adopting this defect detecting device.
Background technology
Along with the develop rapidly of display technique, touch-screen is gradually in the life of people.At present, In-cell touch panel (InCellTouchPanel) can by embedded for touch-control parts inner to display screen, and this both can the thickness of thinning module entirety, greatly can reduce again the cost of manufacture of touch-screen.Therefore In-cell touch panel receives the favor of Ge great panel vendor, and the detection mode of In-cell touch panel also becomes the focus of research simultaneously.
For self-capacitance In-cell touch panel of the prior art, usually block of cells can be divided into as touch control electrode by the public electrode in operational zone (AA, ActiveArea).Each touch control electrode is connected to the pin of touch-control circuit output terminal by sensing signal line (i.e. Rx signal wire).In the display stage, touch-control circuit writes public electrode voltages by Rx signal wire to each touch control electrode.The Rx signal wire of current connection touch control electrode all runs through AA district, and the situation of the public electrode short circuit of Rx signal wire and non-corresponding touch control electrode can occur in processing procedure.The defect detecting device of the self-capacitance contact panel shown in Fig. 1 is generally adopted to detect above-mentioned short-circuit conditions in prior art.
With reference to Fig. 1, in existing pick-up unit, the Rx of odd column is connected to TPDO data line, and the Rx signal wire of even column is connected to TPDE data line.When detecting, first writing different potentials by control TFT switching device (being controlled the conducting of each TFT switching device 20 and closedown by TPSW signal wire) to the touch control electrode that odd, even ordered series of numbers Rx signal wire is corresponding, then detecting by observing display frame the situation that whether there is Rx signal wire and public electrode short circuit.Such as, first to the touch control electrode write 4.5V current potential that odd column Rx signal wire is corresponding during detection, to the touch control electrode write 0V current potential that even column Rx signal wire is corresponding, the signal of the data line write 4.5V all to AA district.The touch control electrode block 10 that such odd column Rx signal wire is corresponding should show black picture, and the touch control electrode block 10 that even column Rx signal wire is corresponding answers display white picture.Then observe display effect, if having touch control electrode block 10 not by the display of expection picture, then illustrate that the public electrode of this block and the Rx signal wire of certain one-level are short-circuited.
Visible, the defect of above-mentioned detection device is: this device can only detect the short-circuit conditions between odd column and even column, and cannot detect specifically which root Rx signal wire and public electrode and there occurs short circuit.
Summary of the invention
Technical matters to be solved by this invention is: the defect detecting device of self-capacitance contact panel of the prior art can only detect the short-circuit conditions between odd column and even column, and cannot detect specifically which root Rx signal wire and public electrode and there occurs short circuit.
In order to solve the problems of the technologies described above, the invention provides a kind of defect detecting device and detection method thereof of self-capacitance contact panel.
According to an aspect of the present invention, provide a kind of defect detecting device of self-capacitance contact panel, it is provided with the multiple driving circuits connected one to one respectively with multirow touch control electrode, described driving circuit comprises the main charging controllability path be made up of latch lock unit in sequential series, cut-off unit and output unit and the auxiliary charging controllability path be made up of the preliminary filling unit be connected to each other and described output unit, wherein:
Described preliminary filling unit, the first charging control signal of preset first voltage while of being set to be produced as each touch control electrode;
Described latch lock unit, is set to store the trigger pip for starting each driving circuit line by line, and is produced as the second charging control signal that each touch control electrode applies the second voltage line by line;
Described output unit, is set to be controlled by described first charging control signal and comes to export described first voltage to described touch control electrode, be controlled by described second charging control signal and come to export described second voltage to described touch control electrode;
Described cut-off unit, is set to the voltage had according to each row touch control electrode, controls the open and close being positioned at the main charging controllability path of the driving circuit corresponding to touch control electrode of a line before this row touch control electrode;
And, described latch lock unit comprises the first on-off element, second switch element, first phase inverter, second phase inverter and the 3rd phase inverter, described first on-off element and described second switch element are all controlled by same clock signal, the input end of described first on-off element connects trigger pip input end, the output terminal of described first on-off element connects the input end of described first phase inverter and the output terminal of the second phase inverter simultaneously, the output terminal of described first phase inverter, input end and the input end of the 3rd phase inverter of described second phase inverter are all connected the input end of described second switch element, output terminal and the output terminal of described 3rd phase inverter of described second switch element are all connected the input end of described cut-off unit, when described first on-off element is in conduction and cut-off state, described second switch element is in cut-off/conducting state.
Preferably, described first on-off element is PMOS transistor, and described second switch element is nmos pass transistor; Or
Described first on-off element is nmos pass transistor, and described second switch element is PMOS transistor.
Preferably, when the output terminal of the latch lock unit of driving circuit corresponding to previous row touch control electrode connects the input end of the latch lock unit of the driving circuit that a line touch control electrode is corresponding below.
Preferably, described cut-off unit comprises the 3rd on-off element; When the output terminal of the output unit of driving circuit corresponding to previous row touch control electrode connects the control end of the 3rd on-off element of the cut-off unit of the driving circuit that a line touch control electrode is corresponding above.
Preferably, described main charging controllability path is opened by described first voltage, and is closed by described second voltage.
Preferably, described preliminary filling unit comprises the 4th on-off element, and its control end connects initial control signal input end, and its input end connects original trigger signal input end, and its output terminal connects the input end of described output unit.
Preferably, described output unit comprises the 4th phase inverter, the 5th phase inverter and Signal transmissions door, the output terminal of described cut-off unit is connected the control end of described Signal transmissions door by described 4th phase inverter and described 5th phase inverter, the input end of described Signal transmissions door connects touching signals input end, and the output terminal of described Signal transmissions door connects touch control electrode.
According to a further aspect in the invention, provide a kind of employing as the detection method of the defect detecting device of above-mentioned self-capacitance contact panel, it comprises:
Each pixel electrode in described self-capacitance contact panel region is charged to tertiary voltage;
Utilize described preliminary filling unit that each touch control electrode is charged to the first voltage simultaneously, to open the main charging controllability path of driving circuit corresponding to each touch control electrode;
Utilize described latch lock unit that each touch control electrode is charged to the second voltage line by line;
Display frame corresponding to each row touch control electrode block judges whether to there is circuit defect.
Preferably, the display frame corresponding to each row touch control electrode block judges whether to there is circuit defect, comprising:
When the test pictures corresponding to certain row touch control electrode block does not show default picture, then determine this row touch control electrode and at least a line and/or there is circuit defect between a line touch control electrode below before it.
Preferably, described tertiary voltage equals described first voltage.
Compared with prior art, the one or more embodiments in such scheme can have the following advantages or beneficial effect by tool:
The present invention can detect the situation of the circuit defect be present in touch control electrode matrix between each row touch control electrode further, and this apparatus structure is simple, and reliability is high.
Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can by instructionss below, claims, and in accompanying drawing, specifically noted structure realizes and obtains.
Accompanying drawing explanation
Accompanying drawing is used to provide the further understanding of technical scheme to the application or prior art, and forms a part for instructions.Wherein, the expression accompanying drawing of the embodiment of the present application and the embodiment one of the application are used from the technical scheme explaining the application, but do not form the restriction to technical scheme.
Fig. 1 shows the schematic diagram of the defect detecting device of self-capacitance contact panel in prior art;
Fig. 2 shows the schematic diagram of the defect detecting device of embodiment of the present invention self-capacitance contact panel;
Fig. 3 shows the enlarged diagram of the regional area S in Fig. 2;
Fig. 4 shows the functional-block diagram of driving circuit in the embodiment of the present invention;
Fig. 5 shows the circuit diagram of driving circuit in the embodiment of the present invention;
Fig. 6 shows the detection sequential chart of embodiment of the present invention defect detecting device; And
Fig. 7 shows the schematic flow sheet of the detection method adopting embodiment of the present invention defect detecting device.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure reaching relevant art effect can fully understand and implement according to this.Each feature in the embodiment of the present application and embodiment, can be combined with each other under prerequisite of not conflicting mutually, the technical scheme formed is all within protection scope of the present invention.
Technical matters to be solved by this invention is: the defect detecting device of self-capacitance contact panel of the prior art can only detect the short-circuit conditions between odd column and even column, and cannot detect specifically which root Rx signal wire and public electrode and there occurs short circuit.For solving the problems of the technologies described above, embodiments provide a kind of defect detecting device of self-capacitance contact panel.
With reference to Fig. 2 to Fig. 6, the defect detecting device of self-capacitance contact panel of the present invention comprises multiple driving circuits 30 that the edge that is arranged on touch control electrode matrix 40 is connected respectively with multirow touch control electrode, and each driving circuit 30 comprises preliminary filling unit 31, latches lock unit 34, output unit 32 and cut-off unit 33.Wherein, latch lock unit 34, cut-off unit 33 and output unit 32 are connected successively and are formed main charging controllability path, and preliminary filling unit 31 is connected with output unit 32, forms auxiliary charging controllability path.
The concrete structure of driving circuit in the embodiment of the present invention is described below in conjunction with Fig. 5.
Preliminary filling unit 31 is for generation of the first charging control signal (the SW signal shown in Fig. 5) for preset first voltage while of each touch control electrode.Particularly, the signal input part that preliminary filling unit 31 comprises the 4th on-off element the 311, four on-off element 311 connects by the SW signal of original trigger signal input end, controls the GAS signal of termination initial control signal input end.When GAS signal is high level, the 4th on-off element 311 is opened, and SW signal puts on the control signal input end (as Suo Shi the A point in Fig. 5) of output unit 32 by the signal output part of the 4th on-off element 311.When GAS signal is low level, the 4th on-off element 311 is closed, and the branch road at its place is high-impedance state, can not have an impact to other parts of driving circuit 30.Under the effect of the first charging control signal SW signal of preliminary filling unit 31, all touch control electrode of touch control electrode matrix 40 can be made to be charged to the first voltage at initial time.
Latch lock unit 34 to be made up of three phase inverters and two on-off elements, for storing the trigger pip ST starting each driving circuit line by line, and be produced as the second charging control signal (the SE signal in Fig. 5) that each touch control electrode applies the second voltage line by line.The output terminal latching lock unit 34 is connected with the input end of cut-off unit 33, controlled the Signal transmissions of adjacent two-stage respectively by the high-low signal of clock signal C K, the touch control electrode that can be respectively each row according to the charging sequential of each row touch control electrode (sequential of charging line by line) is filled with the second voltage.
With reference to Fig. 5, the structure latching lock unit 34 is simple, only comprises the first on-off element 341, first phase inverter 342, second phase inverter 343, second switch element 344 and the 3rd phase inverter 345.Described first on-off element 341 and described second switch element 344 are all controlled by same clock signal C K, the input end of described first on-off element 341 connects trigger pip input end, the output terminal of described first on-off element 341 connects the input end of described first phase inverter 342 and the output terminal of the second phase inverter 343 simultaneously, and the output terminal of described first phase inverter 342, input end and the input end of the 3rd phase inverter 345 of described second phase inverter 343 are all connected the input end of described second switch element 344.Output terminal and the output terminal of described 3rd phase inverter 345 of described second switch element 344 are all connected the input end of described cut-off unit 33.Described first on-off element 341 and second switch element 344 are respectively PMOS/NMOS transistor and NMOS/PMOS transistor.In the embodiment shown in fig. 5, the first on-off element 341 is PMOS transistor, and second switch element 344 is nmos pass transistor.In other embodiments, the first on-off element 341 also can be nmos pass transistor, and now second switch element 344 is PMOS transistor.
When the output terminal of the latch lock unit of driving circuit corresponding to previous row touch control electrode connects the input end of the latch lock unit of the driving circuit that a line touch control electrode is corresponding below.Namely using the trigger pip ST [n-1] of the output terminal of the latch lock unit 34 of the (n-1)th row as the input end signal of the latch lock unit 34 of n-th line, and then the displacement realizing trigger pip is latched.In addition, each low level signal latching lock unit 34 can be pre-set by asynchronous reset end RE.
The principle of work of middle latch lock unit 34 embodiment illustrated in fig. 5 is as follows: after previous row ST [n-1] provides a high level signal, synchronously CK signal is set to low level signal, and in Fig. 5, the first on-off element 341 is opened, and second switch element 344 is closed.Now, due to the interlock function of the first phase inverter 342 and the second phase inverter 343, the signal of ST [n-1] is pinned.In next stage, CK signal is set to high level signal, in Fig. 5, the first on-off element 341 is closed, and second switch element 344 is opened.Now, ST [n-1] signal disconnects with the interlocking unit to be made up of the first phase inverter 342 and the second phase inverter 343, simultaneously by the signal transmission in interlocking unit in ST [n].Then in next stage, CK signal is set to low level signal again, and in like manner, the first on-off element 341 is opened, and second switch element 344 is closed.Because now ST [n-1] signal has been electronegative potential, latch lock unit 34 and ST [n] is set low.Thus realize the latch of trigger pip, synchronous and transmission.
The first charging control signal that output unit 32 receives preliminary filling unit 31 generation exports the first voltage, and the second charging control signal latching lock unit 32 generation exports the second voltage, then utilizes the first voltage or the second voltage to charge to each touch control electrode.Particularly, as shown in Figure 5, output unit 32 comprises the 4th phase inverter 321, the 5th phase inverter 322 and Signal transmissions door 323, the output terminal of described cut-off unit 33 is connected the control end of described Signal transmissions door 323 by described 4th phase inverter 321 and described 5th phase inverter 322, the input end of described Signal transmissions door 323 connects touching signals input end (touching signals input end input RX signal), and the output terminal of described Signal transmissions door 323 connects touch control electrode.First charging control signal or the second charging control signal access the control signal input end of output unit 32 via A point.When charging control signal (SE signal or SW signal) is for low level, Signal transmissions door 323 is opened, and signal Rx exports to touch control electrode through Signal transmissions door 323.When charging control signal is high level, Signal transmissions door 323 is closed, and the voltage of touch control electrode remains unchanged.Herein, signal Rx is the voltage signal with the first voltage or the second voltage.
Cut-off unit 33 is for controlling conducting and the closedown of main charging controllability path.When the touch control electrode of certain a line is charged to the second voltage, the cut-off unit 33 being positioned at the driving circuit corresponding to touch control electrode of a line above will close the main charging controllability path of this driving circuit.Particularly, as shown in Figure 5, cut-off unit 33 comprises the 3rd on-off element 331,3rd on-off element 331 is connected in series in and latches between lock unit 34 and output unit 32, namely its signal input part connects the output terminal latching lock unit 34, its signal output part connects the control signal input end of output unit 32, and the 3rd on-off element 331 provides the first charging control signal SE signal to the transmission path of output unit 32.
Further, the control end of the 3rd on-off element 331 is connected with the output terminal of the output unit of next stage driving circuit.That is, the output signal Out [n+1] being positioned at the driving circuit of the 3rd on-off element 331 corresponding to the touch control electrode of the (n+1)th row of n-th line controls.When Out [n+1] is for high level, SE signal is to the transmission path conducting of output unit 32, and under the effect of SE signal, output unit 32 exports the second voltage and charges for this row touch control electrode.When Out [n+1] is for low level, SE signal is closed to the transmission path of output unit 32, and this row touch control electrode can not be charged, and is maintained the first voltage.By ending the blocking effect of unit 33, [n+1] row touch control electrode block can be made to show different from the display frame corresponding to [n] row touch control electrode block, and the position determining circuit defect further can be taken this.
In the defect detecting device of the embodiment of the present application, the connected mode of each horizontal drive circuit 30 as shown in Figure 3, corresponding to every row touch control electrode, a driving circuit 30 is set, the output signal of the output unit 32 of each driving circuit 30 feeds back to the control input end of the cut-off unit 33 of the driving circuit 30 being positioned at a line before it, and each latch is synchronously connected with the input end of the latch lock unit 34 being positioned at a line after it respectively at the output terminal of unit 34.The latch lock unit 34 of the driving circuit that each row touch control electrode is corresponding all connects clock signal C K.The asynchronous reset end RE of the latch lock unit 34 of the control end of the preliminary filling unit 31 of each driving circuit 30 and signal input part, each driving circuit 30 connects together respectively.
The defect detecting device of the embodiment of the present application can realize following functions, is each touch control electrode preset first voltage simultaneously, for each touch control electrode applies the second voltage line by line.Start each driving circuit line by line by the trigger pip ST [0] of initial time to detect.When causing due to circuit defect the touch control electrode being positioned at back row to be charged to the second voltage prior to the touch control electrode before it, closing the main charging controllability path of previous row touch control electrode, making it remain the first voltage.Sequential chart below in conjunction with Fig. 6 describes said process in detail.
First, need first to carry out precharge to open the main charging controllability path of each row touch control electrode to driving circuit 30.Open the 4th on-off element 311 by the high level of GAS signal, period makes SW signal keep low level, and then makes Signal transmissions door 323 conducting, and Rx signal is exported by Signal transmissions door 323, and charges to the touch control electrode driven by Signal transmissions door 323.Be high level at the low period chien shih Rx signal of SW signal, each row touch control electrode bulk charge can be made to high level, as shown in the Out [1] in Fig. 6, Out [2] and Out [3].Because the voltage of each touch control electrode is high level, so the 3rd on-off element 331 of every a line is all unlocked, namely the main charging controllability path of all touch control electrode is all in the state of conducting.
Then, Signal transmissions door 323 is adjusted to stable closed condition.Be divided into two steps, at the 4th on-off element 311 open period, first make SW signal become high level and carry out shutdown signal transmission gate 323, then by negative pulse reset signal RE, latch lock unit 34 is resetted.VGH high level signal makes the output terminal of each latch lock unit 34 be low level, as shown in the ST [1] in Fig. 6 and ST [2].ST [1] and ST [2] is transferred to the control signal input end of output unit 32 by cut-off unit 33, and Signal transmissions door 323 is closed, and therefore, after GAS gets back to low level, Signal transmissions door 323 still can be in stable closed condition.
Next, controlled the Signal transmissions of adjacent two-stage respectively by the high-low signal of clock signal C K, thus make often row touch control electrode be charged to the second voltage step by step.
As can be seen from the above-mentioned course of work, this defect inspection device, without the need to the scan mode of complexity, only need carry out corresponding initial setting up, just can detect the defect of touch control electrode under the effect of trigger pip and clock signal, test signal is simple and easy to implement, and reliability is higher.
Utilize the defect inspection device of above-mentioned self-capacitance contact panel to carry out the method for defects detection as shown in Figure 7, the method comprises the following steps:
Step S1: each pixel electrode in self-capacitance contact panel region is charged to tertiary voltage.
Step S2: utilize preliminary filling unit 31 each touch control electrode to be charged to simultaneously the first voltage to open the main charging controllability path of each touch control electrode.
Step S3: utilize latch lock unit 34 that each touch control electrode is charged to the second voltage line by line.
Step S4: the display frame corresponding to each row touch control electrode block judges whether to there is circuit defect.Particularly:
First, each pixel electrode in this region is charged to tertiary voltage, such as 4.5V by all data lines (data line) in electric touch control operation region.Then, more each touch control electrode is charged to the first voltage, the first voltage can be equal with tertiary voltage, and namely the first voltage is also taken as 4.5V.Can be completed by the driving circuit of display panels the charging of pixel electrode, then can be completed by the precharge sequential of above-mentioned defect inspection device the charging of touch control electrode.Because touch control electrode and common electrode layer are arranged with layer, therefore when the voltage that pixel electrode and touch control electrode have is equal, in IPS liquid crystal display, be shown as black with the initial picture corresponding to each row touch control electrode block.Further, under the effect of the first voltage, the main charging controllability path of each row touch control electrode is all unlocked.
Next, start to apply the second voltage to each touch control electrode line by line, such as 0V, before not charged, each pixel electrode still maintains tertiary voltage, and said process can be completed by the detection sequential of defect inspection device after t.Because the main charging controllability path of each driving circuit is all in opening, after therefore each row touch control electrode can be charged to 0V successively, the picture of the block display of its correspondence will become white picture.To be short-circuited between the touch control electrode of different rows and signal wire if having defect, then the situation that can change according to display frame determines the position of defect.
Concrete, when the picture corresponding to certain row or a few row touch control electrode block does not show default picture, be then judged as this row touch control electrode and at least a line and/or there is circuit defect between a line touch control electrode below before it.For example, the signal wire supposing the touch control electrode being positioned at the 1st row and the touch control electrode being positioned at the 4th row are short-circuited, and so can charge to the touch control electrode of the 4th row when giving the 1st row touch control electrode charging simultaneously.And after the touch control electrode of the 4th row is charged to 0V, be closed causing the main charging controllability path of the 3rd row touch control electrode, therefore, 3rd row touch control electrode just can not be charged to the 0V specified, still black is remained with the picture corresponding to the 3rd row touch control electrode block, and then according to the display situation of above-mentioned picture, can determine that the 4th row may there occurs short circuit with certain a line in the 1st row, the 2nd row or the 3rd row or a few row touch control electrode (or signal wire of touch control electrode).
Again such as, when circuit defect is present between the 3rd row touch control electrode and the 4th row touch control electrode, 3rd row touch control electrode will start to charge with the 4th row touch control electrode simultaneously, when the voltage of the 4th row touch control electrode is increased to certain value, the cut-off unit 33 by the 3rd row is closed the main charging controllability path of the 3rd row touch control electrode, and now the 3rd row touch control electrode is not also charged to the second voltage of setting, therefore the block that the 3rd row touch control electrode is corresponding can demonstrate the grey screen between white picture and black picture, namely existing defects between two adjacent row can be judged.
It should be noted that, after determining the scope that above-mentioned defect occurs, specifically there occurs short circuit between which row touch control electrode (or signal wire of touch control electrode and touch control electrode), can carry out further detecting to eliminate defect in the scope determined.
It is also to be noted that in the above-described embodiments, for the ease of operation, respectively the first voltage and tertiary voltage are taken as 4.5V, the second voltage is taken as 0V, the difference of such picture is more remarkable, is conducive to the difference observed between picture.First voltage, the second voltage and tertiary voltage can certainly be taken as other values set, as long as guarantee control the conducting of main charging controllability path by the value of the first voltage and the second voltage and close.First voltage and tertiary voltage can also be taken as different values, all may be used for realizing the present invention.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (10)
1. the defect detecting device of a self-capacitance contact panel, be provided with the multiple driving circuits connected one to one respectively with multirow touch control electrode, described driving circuit comprises the main charging controllability path be made up of latch lock unit in sequential series, cut-off unit and output unit and the auxiliary charging controllability path be made up of the preliminary filling unit be connected to each other and described output unit, wherein:
Described preliminary filling unit, the first charging control signal of preset first voltage while of being set to be produced as each touch control electrode;
Described latch lock unit, is set to store the trigger pip for starting each driving circuit line by line, and is produced as the second charging control signal that each touch control electrode applies the second voltage line by line;
Described output unit, is set to be controlled by described first charging control signal and comes to export described first voltage to described touch control electrode, be controlled by described second charging control signal and come to export described second voltage to described touch control electrode;
Described cut-off unit, is set to the voltage had according to each row touch control electrode, controls the open and close being positioned at the main charging controllability path of the driving circuit corresponding to touch control electrode of a line before this row touch control electrode;
And, described latch lock unit comprises the first on-off element, second switch element, first phase inverter, second phase inverter and the 3rd phase inverter, described first on-off element and described second switch element are all controlled by same clock signal, the input end of described first on-off element connects trigger pip input end, the output terminal of described first on-off element connects the input end of described first phase inverter and the output terminal of the second phase inverter simultaneously, the output terminal of described first phase inverter, input end and the input end of the 3rd phase inverter of described second phase inverter are all connected the input end of described second switch element, output terminal and the output terminal of described 3rd phase inverter of described second switch element are all connected the input end of described cut-off unit, when described first on-off element is in conduction and cut-off state, described second switch element is in cut-off/conducting state.
2. defect detecting device according to claim 1, is characterized in that,
Described first on-off element is PMOS transistor, and described second switch element is nmos pass transistor; Or
Described first on-off element is nmos pass transistor, and described second switch element is PMOS transistor.
3. defect detecting device according to claim 2, is characterized in that, when the output terminal of the latch lock unit of driving circuit corresponding to previous row touch control electrode connects the input end of the latch lock unit of the driving circuit that a line touch control electrode is corresponding below.
4. defect detecting device according to any one of claim 1 to 3, is characterized in that, described cut-off unit comprises the 3rd on-off element; When the output terminal of the output unit of driving circuit corresponding to previous row touch control electrode connects the control end of the 3rd on-off element of the cut-off unit of the driving circuit that a line touch control electrode is corresponding above.
5. defect detecting device according to claim 4, is characterized in that, described main charging controllability path is opened by described first voltage, and is closed by described second voltage.
6. defect detecting device according to any one of claim 1 to 3, it is characterized in that, described preliminary filling unit comprises the 4th on-off element, its control end connects initial control signal input end, its input end connects original trigger signal input end, and its output terminal connects the input end of described output unit.
7. defect detecting device according to any one of claim 1 to 3, it is characterized in that, described output unit comprises the 4th phase inverter, the 5th phase inverter and Signal transmissions door, the output terminal of described cut-off unit is connected the control end of described Signal transmissions door by described 4th phase inverter and described 5th phase inverter, the input end of described Signal transmissions door connects touching signals input end, and the output terminal of described Signal transmissions door connects touch control electrode.
8. adopt a detection method for the defect detecting device of the self-capacitance contact panel according to any one of claim 1 to 7, comprising:
Each pixel electrode in described self-capacitance contact panel region is charged to tertiary voltage;
Utilize described preliminary filling unit that each touch control electrode is charged to the first voltage simultaneously, to open the main charging controllability path of driving circuit corresponding to each touch control electrode;
Utilize described latch lock unit that each touch control electrode is charged to the second voltage line by line;
Display frame corresponding to each row touch control electrode block judges whether to there is circuit defect.
9. defect inspection method according to claim 8, is characterized in that, the display frame corresponding to each row touch control electrode block judges whether to there is circuit defect, comprising:
When the test pictures corresponding to certain row touch control electrode block does not show default picture, then determine this row touch control electrode and at least a line and/or there is circuit defect between a line touch control electrode below before it.
10. defect inspection method according to claim 8 or claim 9, it is characterized in that, described tertiary voltage equals described first voltage.
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| CN201510745474.3A CN105225622B (en) | 2015-11-05 | 2015-11-05 | The defects of self-capacitance contact panel detection means and its detection method |
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| CN201510745474.3A CN105225622B (en) | 2015-11-05 | 2015-11-05 | The defects of self-capacitance contact panel detection means and its detection method |
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| CN105225622B CN105225622B (en) | 2017-12-05 |
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| CN201510745474.3A Active CN105225622B (en) | 2015-11-05 | 2015-11-05 | The defects of self-capacitance contact panel detection means and its detection method |
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