CN103926496A - Test apparatus and method for touch screen module, and touch screen module - Google Patents
Test apparatus and method for touch screen module, and touch screen module Download PDFInfo
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- CN103926496A CN103926496A CN201310009791.XA CN201310009791A CN103926496A CN 103926496 A CN103926496 A CN 103926496A CN 201310009791 A CN201310009791 A CN 201310009791A CN 103926496 A CN103926496 A CN 103926496A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/2221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test input/output devices or peripheral units
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/965—Switches controlled by moving an element forming part of the switch
- H03K2217/9651—Switches controlled by moving an element forming part of the switch the moving element acting on a force, e.g. pressure sensitive element
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Quality & Reliability (AREA)
- Human Computer Interaction (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a test apparatus and method for a touch screen module, and a touch screen module. The test apparatus comprises the following components: a driving switch respectively connected in series between a driving line and a driving circuit; a detection circuit respectively connected in series between a detection line and a detection circuit; a self-test capacitor; a driving end capacitance switch which is respectively connected in series with the driving circuit and is connected in parallel with the first end of the self-test capacitor; a detection end capacitance switch which is respectively connected in series with the detection switch and is connected in parallel with the second end of the self-test capacitor; and a control module which controls on-off state of each switch according to a set pathway detection strategy, controls each driving circuit to send driving signals and determines pathway faults of a signal line according to detection signals obtained by each detection circuit. According to the invention, pathway detection can be automatically controlled and finished based on already existing functions of a control chip, and the work efficiency is improved.
Description
Technical field
The present invention relates to electric test technology, relate in particular to a kind of proving installation and method and touch-screen module of touch-screen module.
Background technology
In recent years, along with the appearance of touch technology, the man-machine interaction of electronic product is experienced earth-shaking variation has been occurred.Touch technology is more and more applied in various electronic equipments, for example panel computer, smart mobile phone, GPS navigation instrument etc.Capacitive touch control techniques is due to advantages such as good support multiple point touching, capacitance touch control screen wear-resistant long service life, and developed rapidly, and its product is used widely.
Capacitive touch screen module comprises touch-screen, control chip and the winding displacement or the circuit board that connect touch-screen and control chip.In touch-screen, be generally laid with several drive wires, several detection lines and ground wire abreast, drive wire is mutually vertical with detection line.Drive wire and detection line are interlaced, but are not connected, and point of crossing can be regarded an electric capacity as.In control chip, be provided with driving circuit and testing circuit.Driving circuit is corresponding with drive wire, for generation of the driving signal of certain frequency, offers drive wire.Testing circuit is corresponding with detection line to be connected, and same frequency can be detected but detection signal that amplitude decays to some extent.In working order, control chip can be controlled driving circuit and send successively driving signal, controls the signal intensity that testing circuit detects the detection signal receive simultaneously, such as the voltage magnitude of pulse signal etc.In complete the refreshing after frame data of control chip, i.e. the whole touch-screen of complete scanning, each unit being enclosed to form by drive wire and detection line can obtain by detection signal the numerical value of a representation signal intensity.When touching touch-screen, people will change the capacitance between drive wire and detection line by body capacitance, thereby the detection signal strength that detection line receives is reduced, control chip can detect the change in signal strength of which unit accordingly, thereby identifies concrete touch location.
Owing to having a large amount of drive wires, detection line and ground wire equisignal line on touch-screen, so there is unavoidably short circuit or the breaking phenomena of circuit in manufacture process, need to before dispatching from the factory, filter out defect ware.In application, will filter out defect ware, be the module that touch-screen, control chip and winding displacement are combined, and unifies test.But no matter which element has problem, whole module all will be lost, and cost analysis is unfavorable.Therefore method is separately test preferably.Short circuit/out of circuit test for the signal path between touch-screen and control chip does not still have ripe method at present.
Whether the signal path between prior art test control chip and touch-screen there is short circuit or opens circuit, and is with probe, to remove respectively to test single signal wire whether have short circuit or open circuit.This kind of method can be measured, but troublesome poeration is higher to instrument requirement, cannot test fast.
Summary of the invention
The invention provides a kind of proving installation and method and touch-screen module of touch-screen module, so as flexibly, the signal path fault between test touch screen and chip rapidly.
The embodiment of the present invention provides a kind of proving installation of touch-screen module, comprising:
N driving switch, is connected on respectively between N bar drive wire and corresponding driving circuit;
N detector switch, is connected on respectively between N bar detection line and corresponding testing circuit;
The electric capacity of testing oneself;
N drive end capacitance switch, connects with N driving switch respectively, and is connected in parallel to the first end of the electric capacity of testing oneself;
N test side capacitance switch, connects with N detector switch respectively, and is connected in parallel to the second end of the electric capacity of testing oneself;
Control module, for detecting strategy according to setting path, control the on off operating mode of a described N driving switch, a N detector switch, a N drive end capacitance switch and N test side capacitance switch, and control each driving circuit and send and drive signal, and the detection signal obtaining according to testing circuit described in each is determined the path fault between drive wire on touch-screen, detection line and ground wire, wherein, N is natural number.
The embodiment of the present invention also provides a kind of method of testing of touch-screen module, and the proving installation of the above-mentioned touch-screen module providing is provided, and the operation that described control module is carried out comprises:
According to setting path, detect strategy, control the on off operating mode of a described N driving switch, a N detector switch, a N drive end capacitance switch and N test side capacitance switch, and control each driving circuit and send and drive signal, and the detection signal obtaining according to testing circuit described in each is determined the path fault between drive wire on touch-screen, detection line and ground wire, wherein, N is natural number.
The embodiment of the present invention also provides a kind of touch-screen module, comprise touch-screen, control chip and connecting circuit, described touch-screen comprises drive wire, detection line and ground wire, described control chip comprises driving circuit and testing circuit, wherein, described touch-screen module also comprises the proving installation of the touch-screen module that any embodiment of the present invention provides.
Technical scheme of the present invention, existing circuit and principle of work in touch-screen module have been utilized, only increasing switch just can open circuit and detect with the path fault of short circuit all circuits with the electric capacity of testing oneself, and operation can the existing function based on control chip have been controlled automatically by control module, do not need manually to test one by one, significantly improved work efficiency.
Accompanying drawing explanation
The structural representation of the proving installation of the touch-screen module that Fig. 1 provides for the embodiment of the present invention one;
The structural representation of the proving installation of the touch-screen module that Fig. 2 provides for the embodiment of the present invention two;
The structural representation of the proving installation of the touch-screen module that Fig. 3 provides for the embodiment of the present invention three;
The structural representation of the proving installation of the touch-screen module that Fig. 4 provides for the embodiment of the present invention four;
The structural representation of the proving installation of the touch-screen module that Fig. 5 provides for the embodiment of the present invention five;
The structural representation of the proving installation of the touch-screen module that Fig. 6 provides for the embodiment of the present invention six;
The structural representation of the proving installation of the touch-screen module that Fig. 7 provides for the embodiment of the present invention seven;
The structural representation of the proving installation of the touch-screen module that Fig. 8 provides for the embodiment of the present invention eight;
The structural representation of the proving installation of the touch-screen module that Fig. 9 provides for the embodiment of the present invention nine;
Figure 10 provides the process flow diagram to short-circuit detecting between drive wire in the method for testing of touch-screen module for the embodiment of the present invention;
Figure 11 provides the process flow diagram to short-circuit detecting between drive wire and detection line in the method for testing of touch-screen module for the embodiment of the present invention;
Figure 12 provides the process flow diagram to short-circuit detecting between detection line in the method for testing of touch-screen module for the embodiment of the present invention;
Figure 13 provides the process flow diagram to short-circuit detecting between detection line and ground wire in the method for testing of touch-screen module for the embodiment of the present invention;
Figure 14 provides the process flow diagram to short-circuit detecting between drive wire and ground wire in the method for testing of touch-screen module for the embodiment of the present invention;
Figure 15 provides the process flow diagram that opens circuit and detect to drive wire in the method for testing of touch-screen module for the embodiment of the present invention;
Figure 16 provides the process flow diagram that opens circuit and detect to detection line in the method for testing of touch-screen module for the embodiment of the present invention.
Embodiment
Embodiment mono-
The structural representation of the proving installation of the touch-screen module that Fig. 1 provides for the embodiment of the present invention one, this proving installation can be used for the short circuit between the signal wire in capacitive touch screen or open circuit fault to detect.As shown in Figure 1, in capacitive touch screen, include parallel N bar drive wire, and parallel N bar detection line, N is natural number, drive wire is mutually vertical with detection line.Touch-screen also comprises a ground wire, can form the voltage difference that detects use between drive wire and ground wire.N bar drive wire, N bar detection line and ground wire are the signal wire in touch-screen, and it is connected with control chip through winding displacement or circuit board.As shown in Figure 1, the signal wire of touch-screen collects in edge, its drive wire formation D0 ..., Dn N pin, detection line form S0 ..., Sn N pin, ground wire forms GND pin.Each pin can be used for being connected with control chip.Control chip can provide driving circuit and testing circuit, N driving circuit be designated as Drive1 ..., Driven, N testing circuit be designated as Sense1 ..., Sensen, be connected with detection line with drive wire respectively.Each driving circuit for providing driving signal to drive wire under controlling, and the drive wire of input drive signal is not equivalent to by driving circuit ground connection.Testing circuit is for receiving the detection signal of detection line, and it is that touching has appearred in correspondence that the detection signal that judges which position has changed.
The proving installation that the present embodiment provides is a test circuit, this proving installation can be integrated in the control chip of touch-screen module, utilizes the principle of work that in touch-screen module, driving circuit transmission drives signal and testing circuit to receive detection signal to realize the detection to signal wire path in touch-screen.But it will be understood by those skilled in the art that test circuit also can be independent of control chip setting.
The proving installation of the touch-screen module that the present embodiment provides comprises: N driving switch, be designated as A1 ..., An, be connected on respectively between N bar drive wire and corresponding driving circuit; N detector switch, be designated as K1 ..., Kn, be connected on respectively between N bar detection line and corresponding testing circuit; The capacitor C of testing oneself; N drive end capacitance switch, be designated as B1 ..., Bn, connect with N driving switch respectively, and be connected in parallel to the first end of the capacitor C of testing oneself; N test side capacitance switch, be designated as M1 ..., Mn, connect with N detector switch respectively, and be connected in parallel to the second end of the capacitor C of testing oneself; Control module (not shown), specifically the mode with hardware or software realizes, be integrated in control chip, be connected with each switch, driving circuit and testing circuit, for detecting strategy according to setting path, control the on off operating mode of a described N driving switch, a N detector switch, a N drive end capacitance switch and N test side capacitance switch, and the detection signal obtaining according to testing circuit described in each is determined the path fault between drive wire on touch-screen, detection line and ground wire.
The principle of work of the present embodiment is: utilized driving circuit to send and to drive signal to each drive wire, and detection line can return to testing circuit the principle of detection signal, between drive wire and detection line, set up the electric capacity of testing oneself, for the inductance capacitance between drive wire in simulate and detection line, and can control by drive end capacitance switch and test side capacitance switch the annexation of drive wire, detection line and the electric capacity of testing oneself.Under different annexations, the electric capacity of testing oneself can have a certain impact to detection signal, under normal condition, short-circuit conditions and open circuit conditions, can produce different detection signals, so, the present embodiment carrys out the transmitting-receiving of break-make, driving signal and the detection signal of gauge tap accordingly, thereby identifies short circuit, the open circuit fault of signal wire on touch-screen.
The technical scheme of the present embodiment, existing circuit and principle of work in touch-screen module have been utilized, only increasing switch just can open circuit and detect with the path fault of short circuit all circuits with the electric capacity of testing oneself, and operation can the existing function based on control chip have been controlled automatically by control module, do not need manually to test one by one, significantly improved work efficiency.
Different path faults for different circuits can adopt different control strategies, below by embodiment, illustrate respectively.
Embodiment bis-
The structural representation of the proving installation of the touch-screen module that Fig. 2 provides for the embodiment of the present invention two, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the short trouble between drive wire is detected.On off state in proving installation as shown in Figure 2, this control module specifically comprises short-circuit detecting unit between drive wire and drive wire, for controlling the driving switch closure of drive wire to be measured, other driving switchs are simultaneously closed or one by one in closure state, the corresponding drive end capacitance switch of drive wire to be measured is closed, at least one test side capacitance switch is closed, rest switch disconnects, by providing driving signal with the corresponding driving circuit of described drive wire to be measured to drive wire to be measured, and by testing circuit, obtain the detection signal at closed capacitance switch place, test side, when judging the detection signal getting and be less than drive wire internal short-circuit threshold value, determine between described drive wire to be measured and other drive wires and have short trouble.
In Fig. 2, take the quantity of drive wire and detection line respectively as two describe as example, and all driving switchs of paper are closed situations simultaneously.Current drive wire to be measured is D0, all driving switch A0 and A1 are closed, the drive end capacitance switch B0 corresponding with drive wire D0 to be measured is closed, at least one test side capacitance switch is closed, in the present embodiment, specifically capacitance switch M0 in test side is closed, rest switch, as B1, M1, K1 and K2 all disconnect.
If there is not short circuit in drive wire D0 to be measured and other drive wires, the driving signal that driving circuit Drive0 produces can be detected testing circuit Sense0 corresponding to end capacitance switch M0 through the capacitor C of testing oneself and measure normal level value, be made as preset value V0, be designated as drive wire internal short-circuit threshold value.If there is short circuit between drive wire D0 to be measured and drive wire D1, the driving signal of driving circuit Drive0 can be through drive wire D0 to drive wire D1, and the driving circuit Drive1 passage that is then in ground state divides and dissipates, as shown in the dashed path in Fig. 2.Now, through testing oneself capacitor C, the measured level value of testing circuit Sense0 can reduce, and is less than drive wire internal short-circuit threshold value.Control module may detect between drive wire D0 to be measured and other drive wires and has short circuit.If select occlusion detection end capacitance switch M1, corresponding testing circuit Sense1 also can test whether short circuit of drive wire to be measured based on same principle.Test successively other drive wires and can complete the short-circuit test between drive wire.
Or when drive wire to be measured is carried out to short-circuit test, the driving switch that can also adopt other drive wires is the scheme in closure state one by one.Control a driving switch closure of other drive wires, then disconnect, more closed next driving switch, make other driving switchs successively in closure state.Like this, when test place drive wire short circuit to be measured, can know this drive wire to be measured specifically and any bar drive wire short circuit by which driving switch closure.
Embodiment tri-
The structural representation of the proving installation of the touch-screen module that Fig. 3 provides for the embodiment of the present invention three, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the short trouble between drive wire and detection line is detected.On off state in proving installation as shown in Figure 3, this control module specifically comprises short-circuit detecting unit between drive wire and detection line, closed for controlling the driving switch that drive wire to be measured is corresponding, all detector switches are closed, rest switch disconnects, by the driving circuit corresponding with described drive wire to be measured, to drive wire to be measured, provide driving signal, and by each testing circuit, obtain detection signal respectively, when judging the detection signal getting and be greater than short-circuit between conductors threshold value, determine between described drive wire to be measured and corresponding detection line and have short trouble.
In Fig. 3, take the quantity of drive wire and detection line respectively as two describe as example, current drive wire to be measured is D0, and the driving switch A0 that drive wire D0 to be measured is corresponding is closed, and all detector switch K0 and K1 are closed, other switches, as D1, B1, B2, M1 and M2 all disconnect.
For whether detect drive wire D0 to be measured and detection line between have short circuit, driving circuit Drive0 provides driving signal.If there is not short circuit between drive wire D0 and each detection line, each testing circuit can not measure by detection line the driving signal that driving circuit Drive0 produces, and on it, signal intensity all can not be greater than the short-circuit between conductors threshold value of setting.If there is short circuit between drive wire D0 and detection line S0, the detection line of short circuit place and the signal between drive wire can sensed capacitance fade, the testing circuit Sense0 corresponding with detection line S0 can measure abnormal detection signal, be greater than short-circuit between conductors threshold value, as shown in the dashed path in Fig. 3.Now can judge between drive wire D0 and detection line S0 and have short circuit.The detected signal value that in like manner, can occur in other testing circuits judges between drive wire D0 and other detection lines whether have short circuit.Test successively other drive wires and can complete the short-circuit test between drive wire and detection line.
Embodiment tetra-
The structural representation of the proving installation of the touch-screen module that Fig. 4 provides for the embodiment of the present invention four, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the short trouble between detection line is detected.On off state in proving installation as shown in Figure 4, this control module specifically comprises: short-circuit detecting unit between detection line and detection line, be used for controlling all detector switches closed, the corresponding test side of detection line to be measured capacitance switch is closed, at least one drive end capacitance switch is closed, rest switch disconnects, by driving circuit corresponding to drive end capacitance switch with closed, provide driving signal, by each testing circuit, obtain detection signal respectively, when judging detection signal that the corresponding testing circuit of non-detection line to be measured gets and be greater than detection line internal short-circuit threshold value, determine between this non-detection line to be measured and detection line to be measured and have short trouble.
In Fig. 4, take the quantity of drive wire and detection line respectively as two describe as example, current detection line to be measured is S0, all detector switch K0 and K1 are closed, detection line S0 to be measured corresponding test side capacitance switch M0 is closed, at least one drive end capacitance switch is closed, the drive end capacitance switch B0 closure of take in the present embodiment describes as example, and rest switch, as M1, B1, A0 and A1 disconnect.By driving circuit Drive0 corresponding to drive end capacitance switch B0 with closed, provide driving signal, this drives signal because driving switch A0 disconnects, so do not provide to drive wire D0, but enter in testing circuit through the capacitor C of testing oneself, as shown in dashed path in Fig. 4.
The driving signal of driving circuit Drive0 can measure by detected circuit Sense0 through the capacitor C of testing oneself, if there is no short circuit between detection line S0 and detection line S1, testing circuit Sense1 can not measure this and drive signal, and its detection signal getting can not be greater than detection line internal short-circuit threshold value; Otherwise, if there is short circuit between detection line S0 and non-detection line S1 to be measured, the testing circuit Sense1 corresponding with non-detection line to be measured can measure abnormal driving signal, be that the detection signal that the corresponding testing circuit Sense1 of non-detection line S1 to be measured gets is greater than detection line internal short-circuit threshold value, now control module can be judged, between detection line S0 to be measured and non-detection line S1 to be measured, has short circuit.Other detection lines are carried out to similar detection, can measure between other detection lines, whether there is short circuit.
Embodiment five
The structural representation of the proving installation of the touch-screen module that Fig. 5 provides for the embodiment of the present invention five, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the short trouble between detection line and ground wire is detected.On off state in proving installation as shown in Figure 5, this control module specifically comprises: short-circuit detecting unit between detection line and ground wire, closed for controlling detector switch and test side capacitance switch that detection line to be measured is corresponding, and any one drive end capacitance switch is closed, rest switch disconnects, and provide driving signal by driving circuit corresponding to drive end capacitance switch with closed, and obtain detection signal by the corresponding testing circuit of detection line to be measured, when judging the detection signal getting and be less than detection line with ground short-circuit between conductors threshold value, determine between described detection line to be measured and ground wire and have short trouble.
In Fig. 5, take the quantity of drive wire and detection line respectively as two describe as example, current detection line to be measured is S0, control detector switch K0 and test side capacitance switch M0 that detection line S0 to be measured is corresponding closed, and any one drive end capacitance switch is closed, the present embodiment be take drive end capacitance switch B0 closure and is described as example, rest switch, as A0, A1, B1, M1 and K1 disconnect, and provides driving signal by driving circuit Drive0 corresponding to drive end capacitance switch B0 with closed.
The driving signal of driving circuit Drive0 can detect by detected circuit Sense0 through the capacitor C of testing oneself, if there is short circuit between detection line S0 to be measured and ground wire GND, detection line S0 is in ground state, testing circuit Sense0 can not measure normal driving signal, be that detection signal is less than detection line and ground short-circuit between conductors threshold value, now can judge between detection line S0 to be measured and ground wire GND and have short circuit.Other detection lines are carried out to similar detection, can test successively between other detection lines and ground wire GND whether have short circuit.
Embodiment six
The structural representation of the proving installation of the touch-screen module that Fig. 6 provides for the embodiment of the present invention six, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the short trouble between drive wire and ground wire is detected.On off state in proving installation as shown in Figure 6, this control module specifically comprises: short-circuit detecting unit between drive wire and ground wire, closed for controlling driving switch and drive end capacitance switch that drive wire to be measured is corresponding, and any one test side capacitance switch is closed, rest switch disconnects, and provide driving signal by the driving circuit corresponding with drive wire to be measured, and obtain detection signal by the closed corresponding testing circuit of test side capacitance switch, when judging the detection signal getting and be less than drive wire with ground short-circuit between conductors threshold value, determine between described drive wire to be measured and ground wire and have short trouble.
In Fig. 6, take the quantity of drive wire and detection line respectively as two describe as example, current drive wire to be measured is D0, control driving switch A0 and drive end capacitance switch B0 that drive wire D0 to be measured is corresponding closed, any one test side capacitance switch is closed, the present embodiment be take test side capacitance switch M0 closure and is described as example, rest switch, as A1, B1, M1, K0 and K1 disconnect, and provide driving signal by the driving circuit Drive0 corresponding with drive wire D0 to be measured, by the closed corresponding testing circuit Sense0 of test side capacitance switch M0, obtain detection signal.
The driving signal of driving circuit Drive0 can measure by detected circuit Sense0 through the capacitor C of testing oneself, if there is short circuit between drive wire D0 and ground wire GND, drive wire D0 is substantially in ground state, testing circuit Sense0 can't detect driving signal substantially, be that the detection signal that testing circuit Sense0 gets is less than drive wire and ground short-circuit between conductors threshold value, as shown in the dashed path in Fig. 6.Now can judge between drive wire D0 and ground wire GND and have short circuit, other drive wires are carried out to similar detection, can judge between other drive wires and ground wire GND whether have short circuit.
Embodiment seven
The structural representation of the proving installation of the touch-screen module that Fig. 7 provides for the embodiment of the present invention seven, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the open circuit fault of drive wire is detected.On off state in proving installation as shown in Figure 7, and also comprises bus 10 in this proving installation, described bus 10 is electrically connected to drive wire, detection line and ground wire mutually.This control module specifically comprises: the drive wire detecting unit that opens circuit, closed for controlling driving switch and drive end capacitance switch that drive wire to be measured is corresponding, and any one test side capacitance switch is closed, rest switch disconnects, and provide driving signal by the driving circuit corresponding with drive wire to be measured, and obtain detection signal by the closed corresponding testing circuit of test side capacitance switch, when judging the detection signal getting and be greater than drive wire and open circuit threshold value, determine that described drive wire to be measured exists open circuit fault.
In Fig. 7, take the quantity of drive wire and detection line respectively as two describe as example, current drive wire to be measured is D0, control driving switch A0 and drive end capacitance switch B0 that drive wire D0 to be measured is corresponding, and any one test side capacitance switch is closed, the test side capacitance switch M0 closure of take in the present embodiment describes as example, rest switch, as A1, B1, M1, K0 and K1 disconnect, and provide driving signal by the driving circuit Drive0 corresponding with drive wire D0 to be measured, and obtain detection signal by the closed corresponding testing circuit Sense0 of test side capacitance switch M0, as shown in the dashed path in Fig. 7.
In the present embodiment, a bus 10 is pressed in to the outer end of signal wire, each signal line and ground wire GND are linked together.Because drive wire is all connected with ground wire GND, therefore the driving signal of the driving circuit Drive0 of drive wire D0 to be measured can flow away through ground wire GND, and testing circuit Sense0 can not detect driving signal.If drive wire D0 exists and to open circuit, corresponding testing circuit Sense0 will measure abnormal driving signal, when judging the detection signal getting and being greater than drive wire and opening circuit threshold value.Now can judge that drive wire D0 to be measured exists and open circuit.Other drive wires are carried out to similar detection, and can judge whether other drive wires exist opens circuit.Especially, when ground wire GND existence is opened circuit, even if drive wire does not open circuit, testing circuit Sense0 also can measure driving signal, and this kind of situation is in follow-up explanation.
Embodiment eight
The structural representation of the proving installation of the touch-screen module that Fig. 8 provides for the embodiment of the present invention eight, take previous embodiment as basis in the present embodiment, optimized control module, relates to the control structure that the open circuit fault of detection line is detected.On off state in proving installation as shown in Figure 8, and also comprises bus 10 in this proving installation, described bus 10 is electrically connected to drive wire, detection line and ground wire mutually.This control module specifically comprises: the detection line detecting unit that opens circuit, closed for controlling detector switch and test side capacitance switch that detection line to be measured is corresponding, and any one drive end capacitance switch is closed, rest switch disconnects, and provide driving signal by driving circuit corresponding to drive end capacitance switch with closed, and obtain detection signal by the corresponding testing circuit of detection line to be measured, when judging the detection signal getting and be greater than detection line and open circuit threshold value, determine that described detection line to be measured exists open circuit fault.
In Fig. 8, take the quantity of drive wire and detection line respectively as two describe as example, current detection line to be measured is S0, control detector switch K0 and test side capacitance switch M0 that detection line S0 to be measured is corresponding, and any one drive end capacitance switch is closed, the present embodiment be take drive end capacitance switch B0 closure and is described as example, rest switch, as A0, A1, B1, M1 and K1 disconnect, and provide driving signal by driving circuit Drive0 corresponding to drive end capacitance switch B0 with closed, and obtain detection signal by the corresponding testing circuit Sense0 of detection line S0 to be measured, as shown in the dashed path in Fig. 8.
The driving signal of driving circuit Drive0 can pass through the capacitor C flow detection circuit Sense0 that tests oneself, but because detection line S0 to be measured is connected with ground wire GND, testing circuit Sense0 should can't detect driving signal.If as shown in Figure 8, detection line S0 to be measured exists and opens circuit, and testing circuit Sense0 will measure abnormal driving signal, judges the detection signal getting and is greater than the detection line threshold value that opens circuit, and now can judge that detection line S0 to be measured exists to open circuit.Other detection lines are similarly detected, and can judge whether other detection lines exist opens circuit.Especially, when ground wire GND existence is opened circuit, even if detection line does not open circuit, testing circuit Sense0 also can measure driving signal, and this kind of situation is in follow-up explanation.
Embodiment nine
The structural representation of the proving installation of the touch-screen module that Fig. 9 provides for the embodiment of the present invention nine, this embodiment be take previous embodiment seven and eight as basis, has optimized control module, relates to the control structure that the open circuit fault of ground wire is detected.This control module also comprises: the ground wire detecting unit that opens circuit, for determining that when the detecting unit that opens circuit all measured signal lines are while opening circuit, determine that described ground wire exists open circuit fault, wherein, specifically drive wire detecting unit and/or the detection line detecting unit that opens circuit that opens circuit of detecting unit that opens circuit, measured signal line is drive wire to be measured and/or detection line to be measured.
In the present embodiment, if existing, ground wire GND opens circuit, drive wire is not connected with ground wire with detection line, at foregoing drive wire, open circuit and detect or the detection line test result detecting that opens circuit can show that all drive wires and detection line all exist open circuit fault, this is to can be used as special case, judges according to this that ground wire GND exists to open circuit.
The technical scheme of various embodiments of the present invention, the circuit of dependence control chip inside can complete short circuit and/or the out of circuit test of the signal wire path between control chip and touch-screen.While carrying out out of circuit test, only bus 10 need be pressed on to the outer end of measured signal line path, be away from one end of control chip, without probe and single signal wire contact measurement, to operating process and instrument, require simple.
The embodiment of the present invention also provides a kind of touch-screen module, it comprises touch-screen, control chip and connecting circuit, described touch-screen comprises drive wire, detection line and ground wire, described control chip comprises driving circuit and testing circuit, connection line is winding displacement or other circuit, be used for connecting each signal wire of touch-screen and control chip, this touch-screen module also comprises the proving installation of the touch-screen module that any embodiment of the present invention provides.This touch-screen module can automatically complete the short circuit of each signal wire on touch-screen, open circuit fault are detected.
Embodiment ten
The embodiment of the present invention ten provides a kind of method of testing of touch-screen module, and the method can adopt the proving installation of the touch-screen module that the embodiment of the present invention provides, and the operation that wherein control module is carried out comprises:
According to setting path, detect strategy, control the on off operating mode of a described N driving switch, a N detector switch, a N drive end capacitance switch and N test side capacitance switch, and control each driving circuit and send and drive signal, and the detection signal obtaining according to testing circuit described in each is determined the path fault between drive wire on touch-screen, detection line and ground wire, wherein, N is natural number.
The operation of control module can by producing, control signal be controlled each switch or device is carried out corresponding action.For short circuit and the open circuit fault of drive wire, detection line and ground wire, can adopt respectively following concrete operation method to realize.
As shown in figure 10, be the short-circuit detecting flow process between drive wire, the state of proving installation can be shown in Figure 2, and the operation that control module is carried out specifically comprises:
Step 101, to control all driving switchs closed, and the corresponding drive end capacitance switch of drive wire to be measured is closed or one by one in closure state, at least one test side capacitance switch is closed, and rest switch disconnects;
Step 102, by providing driving signal with the corresponding driving circuit of described drive wire to be measured to drive wire to be measured;
Step 103, by testing circuit, obtain the detection signal at closed capacitance switch place, test side;
Step 104, when judging the detection signal getting and be less than drive wire internal short-circuit threshold value, determine between described drive wire to be measured and other drive wires and have short trouble.
As shown in figure 11, be the short-circuit detecting flow process between drive wire and detection line, the state of proving installation can be shown in Figure 3, and the operation that control module is carried out specifically comprises:
Step 111, to control driving switch corresponding to drive wire to be measured closed, and all detector switches are closed, and rest switch disconnects;
Step 112, by providing driving signal with the corresponding driving circuit of described drive wire to be measured to drive wire to be measured;
Step 113, by each testing circuit, obtain detection signal respectively;
Step 114, when judging the detection signal getting and be greater than short-circuit between conductors threshold value, determine between described drive wire to be measured and corresponding detection line and have short trouble.
As shown in figure 12, be the short-circuit detecting flow process between detection line, the state of proving installation can be shown in Figure 4, and the operation that control module is carried out specifically comprises:
Step 121, to control all detector switches closed, and the corresponding test side of detection line to be measured capacitance switch is closed, and at least one drive end capacitance switch is closed, and rest switch disconnects;
Step 122, by driving circuit corresponding to drive end capacitance switch with closed, provide driving signal;
Step 123, by each testing circuit, obtain detection signal respectively;
Step 124, when judging detection signal that the corresponding testing circuit of non-detection line to be measured gets and be greater than detection line internal short-circuit threshold value, determine between this non-detection line to be measured and detection line to be measured and have short trouble.
As shown in figure 13, be the short-circuit detecting flow process between detection line and ground wire, the state of proving installation can be shown in Figure 5, and the operation that control module is carried out specifically comprises:
Step 131, control detector switch that detection line to be measured is corresponding and test side capacitance switch is closed, and any one drive end capacitance switch is closed, rest switch disconnects;
Step 132, by driving circuit corresponding to drive end capacitance switch with closed, provide driving signal;
Step 133, by the corresponding testing circuit of detection line to be measured, obtain detection signal;
Step 134, when judging the detection signal getting and be less than detection line with ground short-circuit between conductors threshold value, determine between described detection line to be measured and ground wire and have short trouble.
As shown in figure 14, be the short-circuit detecting flow process between drive wire and ground wire, the state of proving installation can be shown in Figure 6, and the operation that control module is carried out specifically comprises:
Step 141, control driving switch that drive wire to be measured is corresponding and drive end capacitance switch is closed, and any one test side capacitance switch is closed, rest switch disconnects;
Step 142, by the driving circuit corresponding with drive wire to be measured, provide driving signal;
Step 143, by the closed corresponding testing circuit of test side capacitance switch, obtain detection signal;
Step 144, when judging the detection signal getting and be less than drive wire with ground short-circuit between conductors threshold value, determine between described drive wire to be measured and ground wire and have short trouble.
As shown in figure 15, be the testing process that opens circuit of drive wire, the state of proving installation can be shown in Figure 7, and the operation that control module is carried out specifically comprises:
Step 151, employing bus are electrically connected to drive wire, detection line and ground wire mutually;
Step 152, control driving switch that drive wire to be measured is corresponding and drive end capacitance switch is closed, and any one test side capacitance switch is closed, rest switch disconnects;
Step 153, by the driving circuit corresponding with drive wire to be measured, provide driving signal;
Step 154, by the closed corresponding testing circuit of test side capacitance switch, obtain detection signal;
Step 155, when judging the detection signal getting and be greater than drive wire and open circuit threshold value, determine that described drive wire to be measured exists open circuit fault.
As shown in figure 16, be the testing process that opens circuit of detection line, the state of proving installation can be shown in Figure 8, and the operation that control module is carried out specifically comprises:
Step 161, employing bus are electrically connected to drive wire, detection line and ground wire mutually;
Step 162, control detector switch that detection line to be measured is corresponding and test side capacitance switch is closed, and any one drive end capacitance switch is closed, rest switch disconnects;
Step 163, by driving circuit corresponding to drive end capacitance switch with closed, provide driving signal;
Step 164, by the corresponding testing circuit of detection line to be measured, obtain detection signal;
Step 165, when judging the detection signal getting and be greater than detection line and open circuit threshold value, determine that described detection line to be measured exists open circuit fault.
At drive wire, open circuit and detect and/or detection line opens circuit on the basis of detecting, can further carry out ground wire detections of opening circuit, i.e. the operation of described control module execution also comprises:
When the detecting unit that opens circuit, determine all measured signal lines and be while opening circuit, determine that described ground wire exists open circuit fault, wherein, measured signal line is drive wire to be measured and/or detection line to be measured.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of programmed instruction.Aforesaid program can be stored in a computer read/write memory medium.This program, when carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (20)
1. a proving installation for touch-screen module, is characterized in that, comprising:
N driving switch, is connected on respectively between N bar drive wire and corresponding driving circuit;
N detector switch, is connected on respectively between N bar detection line and corresponding testing circuit;
The electric capacity of testing oneself;
N drive end capacitance switch, connects with N driving switch respectively, and is connected in parallel to the first end of the electric capacity of testing oneself;
N test side capacitance switch, connects with N detector switch respectively, and is connected in parallel to the second end of the electric capacity of testing oneself;
Control module, for detecting strategy according to setting path, control the on off operating mode of a described N driving switch, a N detector switch, a N drive end capacitance switch and N test side capacitance switch, and control each driving circuit and send and drive signal, and the detection signal obtaining according to testing circuit described in each is determined the path fault between drive wire on touch-screen, detection line and ground wire, wherein, N is natural number.
2. the proving installation of touch-screen module according to claim 1, is characterized in that, described control module comprises:
Short-circuit detecting unit between drive wire and drive wire, for controlling the driving switch closure of drive wire to be measured, other driving switchs are simultaneously closed or one by one in closure state, the corresponding drive end capacitance switch of drive wire to be measured is closed, at least one test side capacitance switch is closed, rest switch disconnects, by providing driving signal with the corresponding driving circuit of described drive wire to be measured to drive wire to be measured, and by testing circuit, obtain the detection signal at closed capacitance switch place, test side, when judging the detection signal getting and be less than drive wire internal short-circuit threshold value, determine between described drive wire to be measured and other drive wires and have short trouble.
3. the proving installation of touch-screen module according to claim 1, is characterized in that, described control module comprises:
Short-circuit detecting unit between drive wire and detection line, closed for controlling the driving switch that drive wire to be measured is corresponding, all detector switches are closed, rest switch disconnects, by the driving circuit corresponding with described drive wire to be measured, to drive wire to be measured, provide driving signal, and by each testing circuit, obtain detection signal respectively, when judging the detection signal getting and be greater than short-circuit between conductors threshold value, determine between described drive wire to be measured and corresponding detection line and have short trouble.
4. the proving installation of touch-screen module according to claim 1, is characterized in that, described control module comprises:
Short-circuit detecting unit between detection line and detection line, be used for controlling all detector switches closed, the corresponding test side of detection line to be measured capacitance switch is closed, at least one drive end capacitance switch is closed, rest switch disconnects, by driving circuit corresponding to drive end capacitance switch with closed, provide driving signal, by each testing circuit, obtain detection signal respectively, when judging detection signal that the corresponding testing circuit of non-detection line to be measured gets and be greater than detection line internal short-circuit threshold value, determine between this non-detection line to be measured and detection line to be measured and have short trouble.
5. the proving installation of touch-screen module according to claim 1, is characterized in that, described control module comprises:
Short-circuit detecting unit between detection line and ground wire, closed for controlling detector switch and test side capacitance switch that detection line to be measured is corresponding, and any one drive end capacitance switch is closed, rest switch disconnects, and provide driving signal by driving circuit corresponding to drive end capacitance switch with closed, and obtain detection signal by the corresponding testing circuit of detection line to be measured, when judging the detection signal getting and be less than detection line with ground short-circuit between conductors threshold value, determine between described detection line to be measured and ground wire and have short trouble.
6. the proving installation of touch-screen module according to claim 1, is characterized in that, described control module comprises:
Short-circuit detecting unit between drive wire and ground wire, closed for controlling driving switch and drive end capacitance switch that drive wire to be measured is corresponding, and any one test side capacitance switch is closed, rest switch disconnects, and provide driving signal by the driving circuit corresponding with drive wire to be measured, and obtain detection signal by the closed corresponding testing circuit of test side capacitance switch, when judging the detection signal getting and be less than drive wire with ground short-circuit between conductors threshold value, determine between described drive wire to be measured and ground wire and have short trouble.
7. the proving installation of touch-screen module according to claim 1, is characterized in that:
In described proving installation, also comprise bus, described bus is electrically connected to drive wire, detection line and ground wire mutually;
Described control module comprises: the drive wire detecting unit that opens circuit, closed for controlling driving switch and drive end capacitance switch that drive wire to be measured is corresponding, and any one test side capacitance switch is closed, rest switch disconnects, and provide driving signal by the driving circuit corresponding with drive wire to be measured, and obtain detection signal by the closed corresponding testing circuit of test side capacitance switch, when judging the detection signal getting and be greater than drive wire and open circuit threshold value, determine that described drive wire to be measured exists open circuit fault.
8. the proving installation of touch-screen module according to claim 1, is characterized in that:
In described proving installation, also comprise bus, described bus is electrically connected to drive wire, detection line and ground wire mutually;
Described control module comprises: the detection line detecting unit that opens circuit, closed for controlling detector switch and test side capacitance switch that detection line to be measured is corresponding, and any one drive end capacitance switch is closed, rest switch disconnects, and provide driving signal by driving circuit corresponding to closed drive end capacitance switch, and obtain detection signal by the corresponding testing circuit of detection line to be measured, when judging the detection signal getting and be greater than detection line and open circuit threshold value, determine that described detection line to be measured exists open circuit fault.
9. according to the proving installation of the touch-screen module described in claim 7 or 8, it is characterized in that, described control module also comprises:
The ground wire detecting unit that opens circuit, for determining that when the detecting unit that opens circuit all measured signal lines are while opening circuit, determines that described ground wire exists open circuit fault, and wherein, measured signal line is drive wire to be measured and/or detection line to be measured.
10. the proving installation of touch-screen module according to claim 1, is characterized in that: described proving installation is integrated in the control chip of touch-screen module.
The method of testing of 11. 1 kinds of touch-screen modules, is characterized in that, adopts the proving installation of touch-screen module claimed in claim 1, and the operation that described control module is carried out comprises:
According to setting path, detect strategy, control the on off operating mode of a described N driving switch, a N detector switch, a N drive end capacitance switch and N test side capacitance switch, and control each driving circuit and send and drive signal, and the detection signal obtaining according to testing circuit described in each is determined the path fault between drive wire on touch-screen, detection line and ground wire, wherein, N is natural number.
The method of testing of 12. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
The driving switch of controlling drive wire to be measured is closed, and other driving switchs whiles are closed or one by one in closure state, the corresponding drive end capacitance switch of drive wire to be measured is closed, and at least one test side capacitance switch is closed, and rest switch disconnects;
By providing driving signal with the corresponding driving circuit of described drive wire to be measured to drive wire to be measured;
By testing circuit, obtain the detection signal at closed capacitance switch place, test side;
When judging the detection signal getting and be less than drive wire internal short-circuit threshold value, determine between described drive wire to be measured and other drive wires and have short trouble.
The method of testing of 13. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
Control the driving switch that drive wire to be measured is corresponding closed, all detector switches are closed, and rest switch disconnects;
By the driving circuit corresponding with described drive wire to be measured, to drive wire to be measured, provide driving signal;
By each testing circuit, obtain detection signal respectively;
When judging the detection signal getting and be greater than short-circuit between conductors threshold value, determine between described drive wire to be measured and corresponding detection line and have short trouble.
The method of testing of 14. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
Control all detector switches closed, the corresponding test side of detection line to be measured capacitance switch is closed, and at least one drive end capacitance switch is closed, and rest switch disconnects;
By driving circuit corresponding to drive end capacitance switch with closed, provide driving signal;
By each testing circuit, obtain detection signal respectively;
When judging detection signal that the corresponding testing circuit of non-detection line to be measured gets and be greater than detection line internal short-circuit threshold value, determine between this non-detection line to be measured and detection line to be measured and have short trouble.
The method of testing of 15. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
Control detector switch and test side capacitance switch that detection line to be measured is corresponding closed, and any one drive end capacitance switch is closed, rest switch disconnects;
By driving circuit corresponding to drive end capacitance switch with closed, provide driving signal;
By the corresponding testing circuit of detection line to be measured, obtain detection signal;
When judging the detection signal getting and be less than detection line with ground short-circuit between conductors threshold value, determine between described detection line to be measured and ground wire and have short trouble.
The method of testing of 16. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
Control driving switch and drive end capacitance switch that drive wire to be measured is corresponding, and any one test side capacitance switch is closed, rest switch disconnects;
By the driving circuit corresponding with drive wire to be measured, provide driving signal;
By the closed corresponding testing circuit of test side capacitance switch, obtain detection signal;
When judging the detection signal getting and be less than drive wire with ground short-circuit between conductors threshold value, determine between described drive wire to be measured and ground wire and have short trouble.
The method of testing of 17. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
Adopt bus that drive wire, detection line and ground wire are electrically connected to mutually;
Control driving switch and drive end capacitance switch that drive wire to be measured is corresponding closed, and any one test side capacitance switch is closed, rest switch disconnects;
By the driving circuit corresponding with drive wire to be measured, provide driving signal;
By the closed corresponding testing circuit of test side capacitance switch, obtain detection signal;
When judging the detection signal getting and be greater than drive wire and open circuit threshold value, determine that described drive wire to be measured exists open circuit fault.
The method of testing of 18. touch-screen modules according to claim 11, is characterized in that, the operation that described control module is carried out specifically comprises:
Adopt bus that drive wire, detection line and ground wire are electrically connected to mutually;
Control detector switch and test side capacitance switch that detection line to be measured is corresponding closed, and any one drive end capacitance switch is closed, rest switch disconnects;
By driving circuit corresponding to drive end capacitance switch with closed, provide driving signal;
By the corresponding testing circuit of detection line to be measured, obtain detection signal;
When judging the detection signal getting and be greater than detection line and open circuit threshold value, determine that described detection line to be measured exists open circuit fault.
19. according to the method for testing of the touch-screen module described in claim 17 or 18, it is characterized in that, the operation that described control module is carried out also comprises:
When the detecting unit that opens circuit, determine all measured signal lines and be while opening circuit, determine that described ground wire exists open circuit fault, wherein, measured signal line is drive wire to be measured and/or detection line to be measured.
20. 1 kinds of touch-screen modules, comprise touch-screen, control chip and connecting circuit, described touch-screen comprises drive wire, detection line and ground wire, described control chip comprises driving circuit and testing circuit, it is characterized in that, described touch-screen module also comprises the proving installation of the arbitrary described touch-screen module of claim 1-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310009791.XA CN103926496B (en) | 2013-01-10 | 2013-01-10 | The test device and method and touch-screen module of touch-screen module |
| PCT/CN2014/070108 WO2014108048A1 (en) | 2013-01-10 | 2014-01-03 | Apparatus for testing touchscreen module and touchscreen module |
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| CN201310009791.XA CN103926496B (en) | 2013-01-10 | 2013-01-10 | The test device and method and touch-screen module of touch-screen module |
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| CN103926496B (en) | 2017-07-28 |
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