The test device and method and touch-screen module of touch-screen moduleTechnical field
The present invention relates to test device and method and the touch of electric test technology, more particularly to a kind of touch-screen moduleShield module.
Background technology
In recent years, with the appearance of touch technology, the man-machine interaction experience of electronic product there occurs earth-shaking changeChange.Touch technology is more and more applied in electronic equipment of various, such as tablet personal computer, smart mobile phone, GPS navigatorDeng.Capacitance touching control technology due to good support multiple point touching, capacitance touch control screen wear-resistant service life is long the advantages of,And developed rapidly, its product is used widely.
Capacitive touch screen module include touch-screen, control chip and connection touch-screen and control chip winding displacement orCircuit board.Abreast several drives lines, several detection lines and ground wire typically are laid with touch-screen, drives line and detection line are mutualVertically.Drives line and detection line are interlaced, but and be not attached to, crosspoint can regard an electric capacity as.Set in control chipIt is equipped with drive circuit and detection circuit.Drive circuit is corresponding with drives line, and the drive signal for producing certain frequency is supplied toDrives line.Detect that circuit is corresponding with detection line to be connected, can detect the detection signal that identical frequency but amplitude have decayed.In workMake under state, control chip can control drive circuit to send drive signal successively, while controlling what detection electric circuit inspection was receivedThe signal intensity of signal is detected, such as the voltage magnitude of pulse signal.After the frame data of refreshing one of control chip completely, i.e.,The whole touch-screen of complete scanning, each unit being set as is enclosed by drives line and detection line can be by detecting that signal obtains oneThe numerical value of representation signal intensity.The electricity between drives line and detection line will be changed by body capacitance when people touches touch-screenCapacitance, so that the detection signal intensity reduction that detection line is received, then control chip can detect the letter of which unit accordinglyNumber Strength Changes, so as to recognize specific touch location.
Due to having a large amount of drives lines, detection line and ground wire equisignal line on touch-screen, so going out unavoidably in the fabrication processThe short circuit of existing circuit or breaking phenomena, then need to filter out defect ware before dispatching from the factory.To filter out defect ware in the application, be byThe module that touch-screen, control chip and winding displacement are combined, carries out unified test.But no matter which element is problematic, entirelyModule will be lost, and cost analysis is unfavorable.Therefore preferably method is separated test.Currently for touch-screen and control chip itBetween signal path short circuit/out of circuit test still without ripe method.
Signal path between prior art testing and control chip and touch-screen, with the presence or absence of short circuit or open circuit, is to use probeRemove to test single signal wire respectively with the presence or absence of short circuit or open circuit.Such a method can be measured, but troublesome poeration, to instrumentIt is required that higher, it is impossible to quickly tested.
The content of the invention
The present invention provides the test device and method and touch-screen module of a kind of touch-screen module, so as to flexible, quickSignal path failure between ground test touch screen and chip.
The embodiments of the invention provide a kind of test device of touch-screen module, including：
N number of driving switch, is connected between N bars drives line and corresponding drive circuit respectively；
N number of detection switch, is connected between N bars detection line and corresponding detection circuit respectively；
Test oneself electric capacity；
N number of drive end capacitance switch, connects with N number of driving switch respectively, and is connected in parallel to the first end for electric capacity of testing oneself；
N number of test side capacitance switch, connects with N number of detection switch respectively, and is connected in parallel to the second end of electric capacity of testing oneself；
Control module, for according to setting path inspection policies, controlling N number of driving switch, N number of detection switch, N number ofThe on off operating mode of drive end capacitance switch and N number of test side capacitance switch, and control each drive circuit to send drive signal, andThe detection signal obtained according to each detection circuit determines the path event between drives line on touch-screen, detection line and ground wireBarrier, wherein, N is natural number.
The embodiment of the present invention additionally provides a kind of method of testing of touch-screen module, using the touch-screen module of above-mentioned offerTest device, the operation that the control module is performed includes：
According to setting path inspection policies, N number of driving switch, N number of detection switch, N number of drive end electric capacity is controlled to openThe on off operating mode with N number of test side capacitance switch is closed, and controls each drive circuit to send drive signal, and according to each inspectionThe detection signal that slowdown monitoring circuit is obtained determines the path fault between drives line on touch-screen, detection line and ground wire, wherein, N is certainlySo count.
The embodiment of the present invention additionally provides a kind of touch-screen module, including touch-screen, control chip and connection circuit, describedTouch-screen includes drives line, detection line and ground wire, and the control chip includes drive circuit and detection circuit, wherein, it is described to touchTouching screen module also includes the test device for the touch-screen module that any embodiment of the present invention is provided.
Technical scheme, make use of existing circuit and the operation principle in touch-screen module, only increase switch andAll circuits just can be carried out with open circuit for electric capacity of testing oneself and the path fault of short circuit is detected, and operation can be based on by control moduleThe functional of control chip automatically controls completion, is not required to manually test one by one, significantly improves operating efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention one is provided；
Fig. 2 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention two is provided；
Fig. 3 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention three is provided;
Fig. 4 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention four is provided;
Fig. 5 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention five is provided;
Fig. 6 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention six is provided;
Fig. 7 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention seven is provided;
Fig. 8 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention eight is provided;
Fig. 9 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention nine is provided;
Figure 10 is provided the stream short-circuit detecting drives line in the method for testing of touch-screen module by the embodiment of the present inventionCheng Tu；
Figure 11 is provided in the method for testing of touch-screen module by the embodiment of the present invention to drives line and detection short-circuit between conductorsThe flow chart of detection；
Figure 12 is provided the stream short-circuit detecting detection line in the method for testing of touch-screen module by the embodiment of the present inventionCheng Tu；
Figure 13 is provided by the embodiment of the present invention to be examined in the method for testing of touch-screen module to detection line and ground short-circuit between conductorsThe flow chart of survey；
Figure 14 is provided by the embodiment of the present invention to be examined in the method for testing of touch-screen module to drives line and ground short-circuit between conductorsThe flow chart of survey；
Figure 15 is provided the stream of the open circuit detection to drives line in the method for testing of touch-screen module by the embodiment of the present inventionCheng Tu；
Figure 16 is provided the stream of the open circuit detection to detection line in the method for testing of touch-screen module by the embodiment of the present inventionCheng Tu.
Embodiment
Embodiment one
Fig. 1 is the structural representation of the test device for the touch-screen module that the embodiment of the present invention one is provided, the test deviceDetected available for the short circuit between the signal wire in capacitive touch screen or open circuit fault.As shown in figure 1, capacitive touchTouch in screen and include parallel N bar drives lines, and parallel N bar detection lines, N is natural number, and drives line is mutual with detection lineVertically.Touch-screen also includes a ground wire, and the voltage difference of detection can be formed between drives line and ground wire.N bars drives line, N barsDetection line and ground wire are the signal wire in touch-screen, and it is connected by winding displacement or circuit board with control chip.I.e. such as Fig. 1 institutesShow, the signal wire of touch-screen collects in edge, its drives line formation D0 ..., Dn N number of pin, detection line formedS0 ..., Sn N number of pin, ground wire formation GND pins.Each pin can be used for being connected with control chip.Control chip can be providedDrive circuit and detection circuit, N number of drive circuit be designated as Drive1 ..., Driven, N number of detection circuit is designated asSense1 ..., Sensen, be connected respectively with drives line and detection line.Each drive circuit is used to carry to drives line under controlFor drive signal, the drives line of non-input drive signal is then grounded equivalent to by drive circuit.Detect that circuit is used to receive to examineDetection signal in survey line, judges that the detection signal of which position changes i.e. corresponding occur in that and touched.
The test device that the present embodiment is provided is a test circuit, and the test device can be integrated in the control of touch-screen moduleIn chip, using in touch-screen module drive circuit send drive signal and detection circuit receive detect signal operation principle comeRealize the detection to signal wire path in touch-screen.It will be appreciated by a person skilled in the art that test circuit can also be independently ofControl chip is set.
The test device for the touch-screen module that the present embodiment is provided includes：N number of driving switch, be designated as A1 ..., An, pointIt is not connected between N bars drives line and corresponding drive circuit；N number of detection switch, be designated as K1 ..., Kn, N is connected on respectivelyBetween bar detection line and corresponding detection circuit；Test oneself electric capacity C；N number of drive end capacitance switch, be designated as B1 ..., Bn, respectivelyConnected with N number of driving switch, and be connected in parallel to the first end for the electric capacity C that tests oneself；N number of test side capacitance switch, be designated as M1 ..., Mn,Connected respectively with N number of detection switch, and be connected in parallel to the second end for the electric capacity C that tests oneself；Control module（Do not show in figure）, specifically with hardwareOr the mode of software is realized, is integrated in control chip, it is connected with each switch, drive circuit and detection circuit, for according to settingDetermine path inspection policies, control N number of driving switch, N number of detection switch, N number of drive end capacitance switch and N number of test side electricityAppearance switches on-off state, and the detection signal obtained according to each detection circuit determines drives line on touch-screen, detection linePath fault between ground wire.
The operation principle of the present embodiment is：It make use of drive circuit to send drive signal to each drives line, and detectLine can return to the principle for detecting signal to detection circuit, electric capacity of testing oneself is additionally arranged between drives line and detection line, for simulatingInductance capacitance on touch-screen between drives line and detection line, and drive end capacitance switch and test side capacitance switch can be passed throughTo control the annexation of drives line, detection line and electric capacity of testing oneself.Under different annexations, electric capacity of testing oneself can be believed detectionNumber have a certain impact, different detection signals can be produced under normal condition, short-circuit conditions and open circuit conditions, so, this realityApply example and come the break-make of controlling switch, drive signal and the transmitting-receiving for detecting signal accordingly, so as to recognize the short of signal wire on touch-screenRoad, open circuit fault.
The technical scheme of the present embodiment, make use of existing circuit and the operation principle in touch-screen module, only increase switchThe path fault that all circuits can just be carried out with open circuit and short circuit with electric capacity of testing oneself is detected, and operation can be by control module baseFunctional in control chip automatically controls completion, is not required to manually test one by one, significantly improves operating efficiency.
Different control strategies can be used for the different path faults of different circuits, is said respectively below by embodimentIt is bright.
Embodiment two
In the structural representation of the test device for the touch-screen module that Fig. 2 provides for the embodiment of the present invention two, the present embodimentBased on previous embodiment, control module is optimized, is related to the control knot detected to the short trouble between drives lineStructure.On off state in test device is as shown in Fig. 2 the control module specifically includes short-circuit detecting list between drives line and drives lineMember, for controlling the driving switch of drives line to be measured to close, other driving switch are closed at or are in closure state one by one, treatThe drive end capacitance switch closure corresponding to drives line is surveyed, at least one test side capacitance switch closure, rest switch disconnects, byDrive signal is provided to drives line to be measured with the drive circuit corresponding to the drives line to be measured, and is closed by detecting that circuit is obtainedDetection signal at the test side capacitance switch of conjunction, when the detection signal for judging to get is less than drives line internal short-circuit threshold valueWhen, it is determined that there is short trouble between the drives line to be measured and other drives lines.
Illustrated in Fig. 2 so that the quantity of drives line and detection line is respectively two as an example, all driving switch are introduced firstSituation about being closed at.Current drives line to be measured is D0, then all driving switch A0 and A1 closure, with drives line D0 to be measuredIt is specifically test side in corresponding drive end capacitance switch B0 closures, at least one test side capacitance switch closure, the present embodimentCapacitance switch M0 is closed, and rest switch, such as B1, M1, K1 and K2 disconnect.
If short circuit, the drive signal that drive circuit Drive0 is produced is not present with other drives lines in drives line D0 to be measuredThe corresponding detection circuit Sense0 of end capacitance switch M0 can be detected by the electric capacity C that tests oneself and measure normal level value, be set toPreset value V0, is designated as drives line internal short-circuit threshold value.If there is short circuit between drives line D0 to be measured and drives line D1, driving electricityRoad Drive0 drive signal can pass through drives line D0 to drives line D1, then be in the drive circuit Drive1 of ground statePassage disperses to fall, as shown in the dashed path in Fig. 2.Now by the electric capacity C that tests oneself, the electricity measured by detection circuit Sense0Level values can be reduced, less than drives line internal short-circuit threshold value.Then control module is that may detect drives line D0 to be measured to drive with otherThere is short circuit between line.If selecting occlusion detection end capacitance switch M1, corresponding detection circuit Sense1 also can be based on sameWhether sample principle tests drives line to be measured short-circuit.The short-circuit test between drives line can be completed by testing other drives lines successively.
Or, when carrying out short-circuit test to drives line to be measured, can also one by one it be located using the driving switch of other drives linesIn the scheme of closure state.Control a driving switch of other drives lines to close, then disconnect, be closed again next drivingSwitch so that other driving switch are in closure state successively.So, can be by which when drives line to be measured is short-circuit at testIndividual driving switch closure knows that the drives line to be measured is specifically short-circuit with which bar drives line.
Embodiment three
In the structural representation of the test device for the touch-screen module that Fig. 3 provides for the embodiment of the present invention three, the present embodimentBased on previous embodiment, control module is optimized, is related to and the short trouble between drives line and detection line is detectedControl structure.On off state in test device as shown in figure 3, the control module specifically include it is short between drives line and detection lineRoad detection unit, for controlling the corresponding driving switch closure of drives line to be measured, all detection switch closures, rest switch breaksOpen, provide drive signal from drive circuit corresponding with the drives line to be measured to drives line to be measured, and pass through each detection respectivelyCircuit obtains detection signal, when the detection signal for judging to get is more than short-circuit between conductors threshold value, it is determined that described to be measuredThere is short trouble between drives line and corresponding detection line.
Illustrated in Fig. 3 so that the quantity of drives line and detection line is respectively two as an example, current drives line to be measured is D0,Then drives line D0 to be measured corresponding driving switch A0 closures, all detection switch K0 and K1 closures, other switches, such as D1, B1,B2, M1 and M2 disconnect.
In order to detect whether drives line D0 to be measured has short circuit between detection line, drive circuit Drive0 provides driving letterNumber.If short circuit is not present between drives line D0 and each bar detection line, each bar detects circuit by detection line all without measurementThe drive signal produced to drive circuit Drive0, i.e., the short-circuit between conductors threshold value that signal intensity is not more than set thereon.If there is short circuit between drives line D0 and detection line S0, the signal between detection line and drives line at short circuit will not be induced electricityHold decay, then detection circuit Sense0 corresponding with detection line S0 can measure abnormal detection signal, i.e., short more than between lineRoad threshold value, as shown in the dashed path in Fig. 3.It now can be determined that there is short circuit between drives line D0 and detection line S0.TogetherReason, the detected signal value that can occur in other detection circuits is judged between drives line D0 and other detection lines with the presence or absence of shortRoad.The short-circuit test between drives line and detection line can be completed by testing other drives lines successively.
Example IV
In the structural representation of the test device for the touch-screen module that Fig. 4 provides for the embodiment of the present invention four, the present embodimentBased on previous embodiment, control module is optimized, is related to the control knot detected to the short trouble between detection lineStructure.On off state in test device is as shown in figure 4, the control module is specifically included：Short-circuit detecting between detection line and detection lineUnit, for controlling all detection switch to close, the test side capacitance switch closure corresponding to detection line to be measured, at least one driveMoved end capacitance switch closure, rest switch is disconnected, and driving is provided by drive circuit corresponding with the drive end capacitance switch of closureSignal, respectively by it is each detection circuit obtain detection signal, when judge the detection circuit corresponding to non-detection line to be measured obtainWhen the detection signal arrived is more than detection line internal short-circuit threshold value, determine to exist between the non-detection line to be measured and detection line to be measured shortRoad failure.
Illustrated in Fig. 4 so that the quantity of drives line and detection line is respectively two as an example, current detection line to be measured is S0,All detection switch K0 and K1 closures, the test side capacitance switch M0 closures corresponding to detection line S0 to be measured, at least one drivingHold capacitance switch closure, illustrated by taking drive end capacitance switch B0 closures as an example in the present embodiment, rest switch, such as M1, B1,A0 and A1 disconnects.Drive signal is provided by drive circuit Drive0 corresponding with the drive end capacitance switch B0 of closure, this drivingSignal is disconnected due to driving switch A0, so not providing into drives line D0, but is passed through the electric capacity C that tests oneself and is entered detection circuitIn, as shown in dashed path in Fig. 4.
Drive circuit Drive0 drive signal is measured by the electric capacity C meetings detected circuit Sense0 that tests oneself, if inspectionWithout short circuit between survey line S0 and detection line S1, then detect that circuit Sense1 will not measure this drive signal, i.e., it getsDetection signal be not more than detection line internal short-circuit threshold value；, whereas if being deposited between detection line S0 and non-detection line S1 to be measuredIn short circuit, then detection circuit Sense1 corresponding with non-detection line to be measured can measure abnormal drive signal, i.e., non-to be measuredThe detection signal that detection circuit Sense1 corresponding to detection line S1 is got is more than detection line internal short-circuit threshold value, now controlsModule can determine that there is short circuit between detection line S0 to be measured and non-detection line S1 to be measured.Similar detection is carried out to other detection lines,With the presence or absence of short circuit between other measurable detection lines.
Embodiment five
In the structural representation of the test device for the touch-screen module that Fig. 5 provides for the embodiment of the present invention five, the present embodimentBased on previous embodiment, control module is optimized, is related to what the short trouble between detection line and ground wire was detectedControl structure.On off state in test device is as shown in figure 5, the control module is specifically included：Detection line and ground short-circuit between conductorsDetection unit, for controlling the corresponding detection switch of detection line to be measured and test side capacitance switch to close, and any one driveMoved end capacitance switch closure, rest switch disconnects, and provides drive by drive circuit corresponding with the drive end capacitance switch of closureDynamic signal, and detection signal is obtained by the detection circuit corresponding to detection line to be measured, when the detection signal for judging to getDuring less than detection line with ground short-circuit between conductors threshold value, it is determined that there is short trouble between the detection line to be measured and ground wire.
Illustrated in Fig. 5 so that the quantity of drives line and detection line is respectively two as an example, current detection line to be measured is S0,Detection line S0 to be measured corresponding detection switch K0 and test side capacitance switch M0 is controlled to close, and any one drive end electric capacitySwitch closure, the present embodiment by drive end capacitance switch B0 closure exemplified by illustrate, rest switch, such as A0, A1, B1, M1 andK1 disconnects, and provides drive signal by drive circuit Drive0 corresponding with the drive end capacitance switch B0 of closure.
Drive circuit Drive0 drive signal is detected by the electric capacity C meetings detected circuit Sense0 that tests oneself, if treatedSurvey between detection line S0 and ground wire GND in the presence of short circuit, then detection line S0 is in ground state, and detection circuit Sense0 will not be measuredTo normal drive signal, that is, detect that signal is less than detection line and ground short-circuit between conductors threshold value, now can be determined that detection to be measuredThere is short circuit between line S0 and ground wire GND.Similar detection is carried out to other detection lines, other detection lines and ground wire can be tested successivelyWith the presence or absence of short circuit between GND.
Embodiment six
In the structural representation of the test device for the touch-screen module that Fig. 6 provides for the embodiment of the present invention six, the present embodimentBased on previous embodiment, control module is optimized, is related to what the short trouble between drives line and ground wire was detectedControl structure.On off state in test device is as shown in fig. 6, the control module is specifically included：Drives line and ground short-circuit between conductorsDetection unit, for controlling the corresponding driving switch of drives line to be measured and drive end capacitance switch to close, and any one inspectionEnd capacitance switch closure is surveyed, rest switch disconnects, and drive signal is provided by drive circuit corresponding with drives line to be measured, and it is logicalCross the detection circuit corresponding to the test side capacitance switch of closure and obtain detection signal, when the detection signal for judging to get is smallWhen drives line is with ground short-circuit between conductors threshold value, it is determined that there is short trouble between the drives line to be measured and ground wire.
Illustrated in Fig. 6 so that the quantity of drives line and detection line is respectively two as an example, current drives line to be measured is D0,Drives line D0 to be measured corresponding driving switch A0 and drive end capacitance switch B0 is controlled to close, any one test side capacitance switchClosure, the present embodiment is illustrated by taking test side capacitance switch M0 closures as an example, and rest switch, such as A1, B1, M1, K0 and K1 breakOpen, and drive signal is provided by drive circuit Drive0 corresponding with drives line D0 to be measured, opened by the test side electric capacity of closureClose the detection circuit Sense0 corresponding to M0 and obtain detection signal.
Drive circuit Drive0 drive signal is measured by the electric capacity C meetings detected circuit Sense0 that tests oneself, if drivenThere is short circuit between moving-wire D0 and ground wire GND, then drives line D0 is substantially at ground state, detection circuit Sense0 is detected substantiallyLess than drive signal, that is, detect that the detection signal that circuit Sense0 is got is less than drives line and ground short-circuit between conductors threshold value, such asShown in dashed path in Fig. 6.It now can be determined that there is short circuit between drives line D0 and ground wire GND, other drives lines enteredThe similar detection of row, it is possible to determine that with the presence or absence of short circuit between other drives lines and ground wire GND.
Embodiment seven
In the structural representation of the test device for the touch-screen module that Fig. 7 provides for the embodiment of the present invention seven, the present embodimentBased on previous embodiment, control module is optimized, is related to the control structure detected to the open circuit fault of drives line.SurveyTrial assembly put on off state as shown in fig. 7, and in the test device also include conductive bar 10, the conductive bar 10 will driveLine, detection line and ground wire are electrically connected to each other.The control module is specifically included：Drives line open circuit detection unit, it is to be measured for controllingThe corresponding driving switch of drives line and drive end capacitance switch closure, and any one test side capacitance switch closure, remaining is openedShut-off is opened, and provides drive signal, and the test side capacitance switch for passing through closure by drive circuit corresponding with drives line to be measuredCorresponding detection circuit obtains detection signal, when the detection signal for judging to get is more than drives line open circuit threshold value,Then determine that the drives line to be measured has open circuit fault.
Illustrated in Fig. 7 so that the quantity of drives line and detection line is respectively two as an example, current drives line to be measured is D0,Drives line D0 to be measured corresponding driving switch A0 and drive end capacitance switch B0 are controlled, and any one test side capacitance switch is closedClose, illustrated in the present embodiment by taking test side capacitance switch M0 closures as an example, rest switch, such as A1, B1, M1, K0 and K1 breakOpen, and drive signal, and the test side electric capacity for passing through closure are provided by drive circuit Drive0 corresponding with drives line D0 to be measuredSwitch the detection circuit Sense0 corresponding to M0 and obtain detection signal, as shown in the dashed path in Fig. 7.
In the present embodiment, a conductive bar 10 is pressed in the outer end of signal wire, each signal line and ground wire GND is all connectedTogether.Because drives line is all connected with ground wire GND, therefore drives line D0 to be measured drive circuit Drive0 drive signal meetingFlowed away through ground wire GND, detection circuit Sense0 will not detect drive signal.If there is open circuit in drives line D0, correspondingDetection circuit Sense0 will measure abnormal drive signal, that is, judge that the detection signal got is disconnected more than drives lineDuring the threshold value of road.It now can be determined that drives line D0 to be measured has open circuit.Similar detection is carried out to other drives lines, it is possible to determine thatOther drives lines are with the presence or absence of open circuit.Particularly, when ground wire GND has open circuit, even if drives line is without open circuit, circuit is detectedSense0 can also measure drive signal, and such a situation is subsequently illustrating.
Embodiment eight
In the structural representation of the test device for the touch-screen module that Fig. 8 provides for the embodiment of the present invention eight, the present embodimentBased on previous embodiment, control module is optimized, is related to the control structure detected to the open circuit fault of detection line.SurveyTrial assembly put on off state as shown in figure 8, and in the test device also include conductive bar 10, the conductive bar 10 will driveLine, detection line and ground wire are electrically connected to each other.The control module is specifically included：Detection line open circuit detection unit, it is to be measured for controllingThe corresponding detection switch of detection line and test side capacitance switch closure, and any one drive end capacitance switch closure, remaining is openedShut-off is opened, and provides drive signal by drive circuit corresponding with the drive end capacitance switch of closure, and passes through detection line to be measuredCorresponding detection circuit obtains detection signal, when the detection signal for judging to get is more than detection line open circuit threshold value,Then determine that the detection line to be measured has open circuit fault.
Illustrated in Fig. 8 so that the quantity of drives line and detection line is respectively two as an example, current detection line to be measured is S0,Control detection line S0 to be measured corresponding detection switch K0 and test side capacitance switch M0, and any one drive end capacitance switchClosure, the present embodiment is illustrated by taking drive end capacitance switch B0 closures as an example, and rest switch, such as A0, A1, B1, M1 and K1 breakOpen, and drive signal is provided by drive circuit Drive0 corresponding with the drive end capacitance switch B0 of closure, and pass through inspection to be measuredDetection circuit Sense0 corresponding to survey line S0 obtains detection signal, as shown in the dashed path in Fig. 8.
Drive circuit Drive0 drive signal can pass through the electric capacity C flow detection circuit Sense0 that test oneself, but because to be measuredDetection line S0 is connected with ground wire GND, and detection circuit Sense0 should can't detect drive signal.If as shown in figure 8, inspection to be measuredThere is open circuit in survey line S0, then detect that circuit Sense0 will measure abnormal drive signal, that is, judge the inspection gotSurvey signal and be more than the breaking threshold value of detection line, now can be determined that detection line S0 to be measured has open circuit.Other detection lines are carried outSimilar detection, it is possible to determine that other detection lines are with the presence or absence of open circuit.Particularly, when ground wire GND has open circuit, even if detectionLine can also measure drive signal without open circuit, detection circuit Sense0, and such a situation is subsequently illustrating.
Embodiment nine
Fig. 9 be the embodiment of the present invention nine provide touch-screen module test device structural representation, the embodiment withBased on previous embodiment seven and eight, control module is optimized, is related to the control structure detected to the open circuit fault of ground wire.The control module also includes：Ground wire open circuit detection unit, for determining that all measured signal lines are disconnected when breaking detection unitLu Shi, determines that the ground wire has open circuit fault, wherein, breaking detection unit be specifically the breaking detection unit of drives line and/orDetection line open circuit detection unit, measured signal line is drives line to be measured and/or detection line to be measured.
In the present embodiment, if ground wire GND has open circuit, drives line and detection line are not connected with ground wire, then precedingThe test result of drives line open circuit detection or detection line open circuit detection described in face can show all drives line and detection line allThere is open circuit fault, this can serve as special case, judge that ground wire GND has open circuit according to this.
The technical scheme of various embodiments of the present invention, control chip and touch can be completed by the circuit inside control chipThe short circuit of signal wire path between screen and/or out of circuit test.When carrying out out of circuit test, only conductive bar 10 need to be pressed on tested letterThe outer end of number line path, that is, be away from one end of control chip, without probe and single signal wire contact measurement, to operating processIt is simple with tool demands.
The embodiment of the present invention additionally provides a kind of touch-screen module, and it includes touch-screen, control chip and connection circuit, instituteStating touch-screen includes drives line, detection line and ground wire, and the control chip includes drive circuit and detection circuit, and connection line isWinding displacement or other circuits, for connecting each signal wire of touch-screen and control chip, it is any that the touch-screen module also includes the present inventionThe test device for the touch-screen module that embodiment is provided.The touch-screen module can be automatically performed to each signal wire on touch-screenShort circuit, open circuit fault detection.
Embodiment ten
The embodiment of the present invention ten provides a kind of method of testing of touch-screen module, and this method can be using present invention implementationThe operation that the test device for the touch-screen module that example is provided, wherein control module are performed includes：
According to setting path inspection policies, N number of driving switch, N number of detection switch, N number of drive end electric capacity is controlled to openThe on off operating mode with N number of test side capacitance switch is closed, and controls each drive circuit to send drive signal, and according to each inspectionThe detection signal that slowdown monitoring circuit is obtained determines the path fault between drives line on touch-screen, detection line and ground wire, wherein, N is certainlySo count.
The operation of control module can control each switch or device to perform corresponding action by producing control signal.ForDrives line, the short circuit of detection line and ground wire and open circuit fault, can be respectively adopted following concrete operation method and realize.
As shown in Figure 10, it is short-circuit detecting flow between drives line, the state of test device can be found in shown in Fig. 2, thenThe operation that control module is performed is specifically included：
Step 101, control all driving switch closure, drive end capacitance switch closure corresponding to drives line to be measured or byOne is in closure state, and at least one test side capacitance switch closure, rest switch disconnects；
Step 102, from the drive circuit corresponding to the drives line to be measured to drives line to be measured provide drive signal；
Detection signal at step 103, the test side capacitance switch by detecting circuit acquisition closure；
Step 104, when the detection signal for judging to get be less than drives line internal short-circuit threshold value when, it is determined that it is described to treatSurvey between drives line and other drives lines and there is short trouble.
As shown in figure 11, it is short-circuit detecting flow between drives line and detection line, the state of test device can be found in Fig. 3Shown, then the operation that control module is performed is specifically included：
The corresponding driving switch closure of step 111, control drives line to be measured, all detection switch closures, rest switch breaksOpen；
Step 112, from the drive circuit corresponding to the drives line to be measured to drives line to be measured provide drive signal；
Step 113, respectively pass through it is each detection circuit obtain detection signal；
Step 114, when the detection signal for judging to get be more than short-circuit between conductors threshold value when, it is determined that it is described it is to be measured driveThere is short trouble between moving-wire and corresponding detection line.
As shown in figure 12, it is short-circuit detecting flow between detection line, the state of test device can be found in shown in Fig. 4, thenThe operation that control module is performed is specifically included：
Step 121, all detection switch closures of control, the test side capacitance switch closure corresponding to detection line to be measured, extremelyFew drive end capacitance switch closure, rest switch disconnects；
Step 122, by drive circuit corresponding with the drive end capacitance switch of closure provide drive signal；
Step 123, respectively pass through it is each detection circuit obtain detection signal；
Step 124, the detection signal got when the detection circuit judged corresponding to non-detection line to be measured are more than detectionDuring line internal short-circuit threshold value, determine there is short trouble between the non-detection line to be measured and detection line to be measured.
As shown in figure 13, it is short-circuit detecting flow between detection line and ground wire, the state of test device can be found in Fig. 5 institutesShow, then the operation that control module is performed is specifically included：
Step 131, the corresponding detection switch of control detection line to be measured and test side capacitance switch closure, and any oneDrive end capacitance switch is closed, and rest switch disconnects；
Step 132, by drive circuit corresponding with the drive end capacitance switch of closure provide drive signal；
Step 133, the detection circuit acquisition passed through corresponding to detection line to be measured detect signal；
Step 134, when the detection signal for judging to get be less than detection line with ground short-circuit between conductors threshold value when, it is determined thatThere is short trouble between the detection line to be measured and ground wire.
As shown in figure 14, it is short-circuit detecting flow between drives line and ground wire, the state of test device can be found in Fig. 6 institutesShow, then the operation that control module is performed is specifically included：
Step 141, the corresponding driving switch of control drives line to be measured and drive end capacitance switch closure, and any oneTest side capacitance switch closure, rest switch disconnects；
Step 142, by drive circuit corresponding with drives line to be measured provide drive signal；
Step 143, the detection circuit acquisition passed through corresponding to the test side capacitance switch of closure detect signal；
Step 144, when the detection signal for judging to get be less than drives line with ground short-circuit between conductors threshold value when, it is determined thatThere is short trouble between the drives line to be measured and ground wire.
As shown in figure 15, it is the breaking testing process of drives line, the state of test device can be found in shown in Fig. 7, then controlThe operation that module is performed is specifically included：
Step 151, using conductive bar drives line, detection line and ground wire are electrically connected to each other；
Step 152, the corresponding driving switch of control drives line to be measured and drive end capacitance switch closure, and any oneTest side capacitance switch closure, rest switch disconnects；
Step 153, by drive circuit corresponding with drives line to be measured provide drive signal；
Step 154, the detection circuit acquisition passed through corresponding to the test side capacitance switch of closure detect signal；
Step 155, when the detection signal for judging to get is more than the breaking threshold value of drives line, it is determined that it is described to be measuredThere is open circuit fault in drives line.
As shown in figure 16, it is the breaking testing process of detection line, the state of test device can be found in shown in Fig. 8, then controlThe operation that module is performed is specifically included：
Step 161, using conductive bar drives line, detection line and ground wire are electrically connected to each other；
Step 162, the corresponding detection switch of control detection line to be measured and test side capacitance switch closure, and any oneDrive end capacitance switch is closed, and rest switch disconnects；
Step 163, by drive circuit corresponding with the drive end capacitance switch of closure provide drive signal；
Step 164, the detection circuit acquisition passed through corresponding to detection line to be measured detect signal；
Step 165, when the detection signal for judging to get is more than the breaking threshold value of detection line, it is determined that it is described to be measuredThere is open circuit fault in detection line.
On the basis of drives line open circuit detection and/or detection line open circuit detection, ground wire open circuit detection can be further performed,The operation that i.e. described control module is performed also includes：
When it is open circuit that breaking detection unit, which determines all measured signal lines, determine that the ground wire has open circuit fault,Wherein, measured signal line is drives line to be measured and/or detection line to be measured.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead toThe related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journeySequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc orPerson's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extentThe present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according toThe technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are enteredRow equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technologyThe scope of scheme.