CN104730341A - Impedance detection circuit and displayer detection device and method - Google Patents
Impedance detection circuit and displayer detection device and method Download PDFInfo
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Abstract
The invention provides a displayer detection device. The displayer detection device comprises the steps that when a signal transceiver receives supply voltage, a capacitor is charged, and a timer begins to keep time; when the voltage across the inverted input end of a voltage comparator is larger than the voltage across the normal-phase input end of the voltage comparator, the timer stops keeping time; whether the time recorded by the timer is larger than a set time value or not is judged; whether the impedance value of a resistor to be detected is larger than an upper limit impedance value or not is judged according to a comparison result. The invention further provides an impedance detection circuit and a displayer detection device. According to the displayer detection device, the time recorded by the timer is compared with the set time value, whether the impedance value of the resistor to be detected is larger than the upper limit impedance value or not is judged, and accordingly whether binding of a flexible circuit board and a printed circuit board is qualified or not is quickly detected; the detection mode is easy and convenient to implement, the detection speed is high, and the accurate rate is high.
Description
Technical field
The present invention relates to display technique field, particularly a kind of impedance detection circuit, display pick-up unit and method.
Background technology
Flat-panel screens, as liquid crystal indicator (Liquid Crystal Display, LCD), because possessing the plurality of advantages such as frivolous, energy-conservation, radiationless, replaced traditional cathode-ray tube (CRT) (CRT) display gradually, current liquid crystal display is widely used in the electronic equipments such as digital TV in high resolution, desk-top computer, personal digital assistant (PDA), notebook computer, mobile phone, digital camera.
Liquid crystal indicator comprises display panel, driving circuit, flexible circuit board (Flexible PrintedCircuit board, and printed circuit board (Printed Circuit Board FPC), PCB), wherein, driving circuit is arranged on a display panel, for providing data-signal and sweep signal to drive display panel display frame to each pixel in display panel, PCB connects display panel to provide common electric voltage to display panel by FPC, the coherent signals such as the sequential of RGB picture element grayscale voltage and drive circuit works, therefore the quality of the binding (Bonding) of driving circuit and FPC and the binding of FPC and PCB is particularly important to liquid crystal indicator.
The bad usual dependence optical microscope (OpticalMicroscope of binding place of current driving circuit and FPC, OM) inspection or reliability testing experiment are carried out blocking inspection, and the bad main dependence visual testing of binding place of FPC and PCB carries out blocking inspection, but binding place of driving circuit and FPC has a lot of projection, easily cause undetected when carrying out OM inspection, and when carrying out visual testing to binding place of PCB and FPC, whether carry out visual testing to be difficult to accurately to differentiate impression qualified because personnel are visual, easily causes erroneous judgement.Therefore, above detection method efficiency is low, and easily causes undetected or flase drop.
Summary of the invention
In view of above problem, the invention provides a kind of impedance detection circuit, can efficient detection binding quality and accuracy in detection is high.
Particularly, a kind of impedance detection circuit provided by the invention, for detecting the resistance value of testing resistance, described impedance detection circuit comprises signal transceiver and electric capacity.Described signal transceiver comprises bleeder circuit, voltage comparator, timer, transmitting terminal and receiving end, wherein, described voltage comparator comprises normal phase input end, inverting input, power end, earth terminal and output terminal, described power end is connected with described transmitting terminal and receives supply voltage, described earth terminal ground connection, described bleeder circuit provides dividing potential drop for described normal phase input end, described inverting input is connected to described receiving end, described output terminal is connected to described timer, described timer is connected to described power end, described transmitting terminal and described receiving end are used for being connected with the two ends of described testing resistance.The first end of described electric capacity is connected with described receiving end, the second end ground connection of described electric capacity.Wherein, described signal transceiver when receiving described supply voltage by described testing resistance to described capacitor charging and described timer starts timing, when described capacitor charging to the voltage of described electric capacity is greater than the dividing potential drop that described bleeder circuit provides, described timer stops timing, with a time setting value between the timing of described impedance detection circuit more described timer institute, judge whether the impedance of described testing resistance is greater than an impedance higher limit according to comparative result.
Further, described bleeder circuit comprises the first resistance and the second resistance, and the first end of described first resistance is connected with described normal phase input end, and the second end of described first resistance is connected with described earth terminal; The first end of described second resistance is connected with described power end, and the second end of described second resistance is connected with described normal phase input end.
Further, described signal transceiver also comprises the 3rd resistance, and described 3rd resistance is connected between described inverting input and described receiving end.
Further, described signal transceiver also comprises the 4th resistance, and the first end of described 4th resistance is connected with described normal phase input end, and the second end of described 4th resistance is connected with described output terminal.
Further, described signal transceiver also comprises light emitting diode, described light emitting diode is connected between described power end and described timer, the positive pole of described light emitting diode connects described power end, the negative pole of described light emitting diode connects described timer, when described lumination of light emitting diode, described timer stops timing.
Further, described signal transceiver also comprises the 5th resistance and the 6th resistance, and described 5th resistance is connected between the positive pole of described power end and described light emitting diode; Described 6th resistance is connected between described power end and described output terminal.
Further, described signal transceiver also comprises diode, and the positive pole of described diode is connected with described receiving end, and the negative pole of described diode is connected with described transmitting terminal.
The present invention also provides a kind of display pick-up unit, described pick-up unit comprises printed circuit board, the flexible circuit board be connected with described printed circuit board and above-mentioned impedance detection circuit, and the binding place of described flexible circuit board and described printed circuit board is formed binds impedance and be defined as the testing resistance that described impedance detection circuit detects.
Further, the signal transceiver of described impedance detection circuit and described electric capacity are arranged on described printed circuit board.
The present invention separately provides a kind of display detection method, and described detection method comprises step: when described signal transceiver receives supply voltage to described capacitor charging and described timer starts timing; When described voltage comparator anti-phase input terminal voltage is greater than normal phase input end voltage, described timer stops timing; Judge whether described timer is greater than a time setting value between clocking; And judge whether the impedance of described testing resistance is greater than an impedance higher limit according to comparative result.
Impedance detection circuit of the present invention, display pick-up unit and method, utilize the timer in signal transceiver clock between size and time setting value compare, and then judge whether the resistance value of testing resistance is greater than impedance higher limit, thus detect fast flexible circuit board and printed circuit board and bind and whether meet the requirements, detection mode is easy, detection speed is fast and accuracy rate is high.
Accompanying drawing explanation
The planar structure schematic diagram of a kind of display pick-up unit that Fig. 1 provides for the embodiment of the present invention.
The structural representation of a kind of impedance detection circuit that Fig. 2 provides for the embodiment of the present invention.
The step schematic diagram of a kind of display detection method that Fig. 3 provides for the embodiment of the present invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the impedance detection circuit proposed according to the present invention, display pick-up unit and its embodiment of method, method, step, structure, feature and effect, be described in detail as follows.
Aforementioned and other technology contents, feature and effect for the present invention, can clearly present in the detailed description of following cooperation with reference to graphic preferred embodiment.By the explanation of embodiment, when can to the present invention for the technological means reaching predetermined object and take and effect be able to more deeply and concrete understanding, however institute's accompanying drawings be only to provide with reference to and the use of explanation, be not used for being limited the present invention.
Please refer to Fig. 1, the planar structure schematic diagram of a kind of display pick-up unit that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, display pick-up unit comprises impedance detection circuit (sign), printed circuit board 10 and flexible circuit board 12, printed circuit board 10 is connected to a display panel (not shown) via flexible circuit board 12, such as display panels, Organic Electricity laser display panel etc.Impedance detection circuit comprises signal transceiver 100 and electric capacity C, and signal transceiver 100 and electric capacity C are arranged on printed circuit board 10.Signal transceiver 100 is for charging to electric capacity C, and signal transceiver 100 comprises transmitting terminal 101 and receiving end 102, and the first end of electric capacity C is connected with receiving end 102, the second end ground connection of electric capacity C.Flexible circuit board 12 is connected by binding with printed circuit board 10, binding impedance can be formed in binding place, defining this binding impedance is testing resistance R1 in Fig. 1, the first end of testing resistance R1 is connected with the transmitting terminal 101 of signal transceiver 100, and second end of testing resistance R1 is connected with the receiving end 102 of the first end of electric capacity C and signal transceiver 100.
Particularly, please refer to Fig. 2, the structural representation of a kind of impedance detection circuit that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, impedance detection circuit is for detecting the resistance value of testing resistance, and it comprises signal transceiver 100 and electric capacity C.Signal transceiver 100 comprises transmitting terminal 101 and receiving end 102, transmitting terminal 101 is connected with the first end of testing resistance R1, the receiving end 102 of signal transceiver 100 is connected with second end of testing resistance R1, the first end of electric capacity C is connected with the receiving end 102 of second end of testing resistance R1 and signal transceiver 100, the second end ground connection of electric capacity C.
Signal transceiver 100 comprises voltage comparator U1, the bleeder circuit (sign) be made up of the first resistance R2 and the second resistance R3, the 3rd resistance R4, the 4th resistance R5, timer J1 and light emitting diode D1.Wherein, voltage comparator U1 can select model to be the voltage comparator of LM393AD, voltage comparator U1 comprises normal phase input end (sign), inverting input (sign), power end (sign), earth terminal (sign) and output terminal (sign), wherein, power end is connected with transmitting terminal 101 and for receiving supply voltage VCC, earth terminal ground connection.The first end of the first resistance R2 is connected with the normal phase input end of voltage comparator U1, and second end of the first resistance R2 is connected with earth terminal, and that is, bleeder circuit is used for providing dividing potential drop for the normal phase input end of voltage comparator U1; The first end of the second resistance R3 is connected with power end, and second end of the second resistance R3 is connected with the normal phase input end of voltage comparator U1; The first end of the 3rd resistance R4 is connected with the inverting input of voltage comparator U1, and second end of the 3rd resistance R4 is connected with receiving end 102.
The first end of the 4th resistance R5 is connected with the normal phase input end of voltage comparator U1, and second end of the 4th resistance R5 is connected with the output terminal of voltage comparator U1; The first end of timer J1 is connected with the output terminal of voltage comparator U1, and second end of timer J1 is connected with the negative pole of light emitting diode D1, and the positive pole of light emitting diode D1 is connected to power end.
In an embodiment of the present invention, impedance detection circuit also comprises the 5th resistance R6, the 6th resistance R7 and diode D2.Wherein, the first end of the 5th resistance R6 is connected with power end, and second end of the 5th resistance R6 is connected with the positive pole of light emitting diode D1, and that is, the 5th resistance R6 is connected between power end and light emitting diode D1; The first end of the 6th resistance R7 is connected with the output terminal of voltage comparator U1, and second end of the 6th resistance R7 is connected with the first end of the 5th resistance R6; The positive pole of diode D2 is connected with receiving end 102, and the negative pole of diode D2 is connected with transmitting terminal 101.Further, in the starting stage, when impedance detection circuit receives supply voltage VCC, timer J1 starts timing, and supply voltage VCC charges to electric capacity C through testing resistance R1, simultaneously the normal phase input end voltage V of voltage comparator U1
+for the dividing potential drop that bleeder circuit provides, namely R2*VCC/ (R2+R3), wherein, supposes R2=62 kilo-ohm, R3=38 kilo-ohm, then normal phase input end voltage V
+for 0.62VCC; Now, the inverting input no-voltage input of voltage comparator U1, therefore, the normal phase input end voltage V of voltage comparator U1
+be greater than the anti-phase input terminal voltage V of voltage comparator U1
-, make the output terminal of voltage comparator U1 export high level, that is, the negative pole of light emitting diode D1 is high level, and therefore light emitting diode D1 oppositely ends, and light emitting diode D1 is not luminous.Because the voltage on electric capacity C is the voltage V of the reverse input end of voltage comparator U1
-, so, at moment t, when electric capacity C is charged to its voltage V by the power end voltage of signal transceiver 100
tbe greater than the normal phase input end V of voltage comparator U1
+time, the anti-phase input terminal voltage V of voltage comparator U1
-be greater than normal phase input end V
+voltage, voltage comparator U1 output low level, light emitting diode D1 starts luminescence, and now, timer J1 stops timing.
In t, because timer J1 stops timing, therefore the displaying time of timer J1 is electric capacity C and is charged to voltage V
tactual value, the discharge and recharge time of electric capacity C is directly proportional to the size of R1, this actual value that timer J1 remembers by this impedance detection circuit and a time setting value compare, if be greater than this time setting value between timer J1 clocks, then illustrate that the resistance value of testing resistance R1 is greater than impedance higher limit, and then can judge that flexible PCB 12 and printed circuit board 10 are bound defective, if be less than or equal to time setting value between timer J1 clocks, then illustrate that the resistance value of testing resistance R1 is less than or equal to impedance higher limit, and then can judge flexible PCB 12 and printed circuit board 10 bind qualified.
In theory, in an initial condition, the voltage V on electric capacity C
t=R2*VCC/ (R2+R3*R5/ (R3+R5)), and electric capacity C is charged to voltage V
ttime (time setting value) t=R1*C*ln [VCC/ (VCC-V
t)]=R1*C, in an embodiment of the present invention, when testing resistance R1 is no more than 1 ohm, it is qualified that flexible PCB 12 and printed circuit board 10 are bound, and that is, the impedance upper limit of binding is 1 ohm, therefore, setting R1=1 ohm, in addition, setting C=0.1F, VCC=5V, R2=62 kilo-ohm, R3=38 kilo-ohm, R4=10 kilo-ohm, R5=1 megaohm, the value adopting above-mentioned formulae discovery can obtain time setting value t is 0.1s.
Impedance detection circuit in the present embodiment can be used for the binding place impedance of detection display device flexible PCB 12 and printed circuit board 10, owing to the most easily breaking down in both sides, binding place district, therefore testing circuit can be arranged at both sides, binding place district, certainly it will be appreciated by persons skilled in the art that testing circuit also can be arranged on the centre position in binding region.
In another embodiment of the present invention, impedance detection circuit can be used for the binding place impedance detecting flexible PCB 12 and display panel, and testing resistance R1 is the binding impedance between flexible circuit board 12 and display panel.
Further, signal transceiver 100 can independently be arranged on printed circuit board 10, or, be integrated in the time schedule controller on printed circuit board 10.
In addition, impedance detection circuit in the present embodiment also can comprise warning light or prompting display device further, when being greater than time setting value t between timer J1 clocks, send cue to warning light or prompting display device, glimmered by warning light, comprise the change of warning light color, or the mode exporting prompting character on the display screen of prompting display device is pointed out, make to detect relevant staff and can know whether binding impedance meets specification of quality requirement.
In the present embodiment, impedance detection circuit utilizes the difference of voltage comparator U1 output end voltage and then controls the luminous situation of light emitting diode D1, and whether the luminescence according to light emitting diode D1 starts timer J1, thus the size of the time remembered according to timer J1 and time setting value judges that whether the resistance value of testing resistance R1 is qualified, and then determine that whether flexible circuit board 12 is qualified with the binding of printed circuit board 10, achieve the automatic detection of binding place, without the need to carrying out OM inspection to display again, save manpower, and not easily occur undetected, improve the accuracy of detection efficiency and detection.
Please refer to Fig. 3, the step schematic diagram of a kind of display detection method that Fig. 3 provides for the embodiment of the present invention.This display detection method is mainly used in the display pick-up unit shown in Fig. 1.As shown in Figure 3, this display detection method comprises step:
31, when signal transceiver receives supply voltage to capacitor charging and timer starts timing; In this step, signal transceiver 100 receives the power supply voltage signal VCC of external power source input, and now timer J1 starts timing, and supply voltage VCC charges to electric capacity C through testing resistance R1, simultaneously the normal phase input end voltage V of voltage comparator U1
+for R2*VCC/ (R2+R3), the inverting input no-voltage input of voltage comparator U1, therefore, the normal phase input end voltage V of voltage comparator U1
+be greater than the anti-phase input terminal voltage V of voltage comparator U1
-, make the output terminal of voltage comparator U1 export high level, light emitting diode D1 oppositely ends, and light emitting diode D1 is not luminous.
32, when voltage comparator anti-phase input terminal voltage is greater than normal phase input end voltage, timer stops timing;
In this step, when electric capacity C is charged to its voltage V
tbe greater than the normal phase input end V of voltage comparator U1
+time, the anti-phase input terminal voltage V of voltage comparator U1
-be greater than normal phase input end voltage V
+, now, light emitting diode D1 is luminous, and timer J1 stops timing.
33, judge whether timer is greater than a time setting value between clocking;
In this step, first according to impedance higher limit, the impedance upper limit of namely binding, the resistance value of setting testing resistance R1, and calculate time setting value t according to the resistance capacitance etc. that impedance detection circuit adopts, and in the testing process of reality, then for electric capacity C is charged to voltage V between timer J1 clocks
ttime actual value.
34, judge whether the impedance of testing resistance is greater than an impedance higher limit according to comparative result;
In this step, if be greater than time setting value t between timer J1 clocks, then represent that the resistance value of testing resistance R1 is greater than impedance higher limit, then flexible circuit board 12 and printed circuit board 10 bind exception, if be less than or equal to time setting value t between timer J1 clocks, then the resistance value of testing resistance R1 is less than or equal to impedance higher limit, then flexible circuit board 12 and printed circuit board 10 bind qualified.
35, cue is exported according to judged result.
This cue for point out timer J1 in step 33 clock between whether be greater than time setting value t, can be glimmered by warning light, comprise the change of warning light color, or the mode exporting prompting character on the display screen of prompting display device is pointed out, make to detect relevant staff and can know whether binding impedance meets specification of quality requirement.
Impedance detection circuit provided by the invention, display pick-up unit and method are except can except the display panel of detection display device and the binding quality of flexible circuit board, flexible circuit board and printed circuit board, also touch display can be applied in, especially on On-Cell touch display.On Cell refers to the mode be embedded into by touch-screen between the colored filter substrate of display panel and polaroid.Because the touch-screen of On Cell touch display and the binding place position of display panel are positioned at black matrix (the Black Matrix of chromatic filter layer, BM) region, because BM is light tight, therefore the binding place situation of touch-screen and display panel cannot check impression by OM.And impedance detection circuit provided by the invention, display pick-up unit and method, can the various binding place impression quality of detection display device whether qualified.
In the embodiment of the present invention, utilize timer J1 clock between judge whether the resistance value of testing resistance R1 is greater than impedance higher limit with the comparative result of time setting value t, if be greater than impedance higher limit, the then flexible circuit board 12 of display and the binding position exception of printed circuit board 10, if be less than or equal to impedance higher limit, then the flexible circuit board 12 of display meets the requirements with the binding of printed circuit board 10, and detection mode is easy and improve detection efficiency and accuracy in detection.
It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.For method class embodiment, due to itself and device embodiment basic simlarity, so description is fairly simple, relevant part illustrates see the part of device embodiment.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. an impedance detection circuit, for detecting the resistance value of testing resistance, is characterized in that, comprising:
Signal transceiver, described signal transceiver comprises bleeder circuit, voltage comparator, timer, transmitting terminal and receiving end, wherein, described voltage comparator comprises normal phase input end, inverting input, power end, earth terminal and output terminal, described power end is connected with described transmitting terminal and receives supply voltage, described earth terminal ground connection, described bleeder circuit provides dividing potential drop for described normal phase input end, described inverting input is connected to described receiving end, described output terminal is connected to described timer, described timer is connected to described power end, described transmitting terminal and described receiving end are used for being connected with the two ends of described testing resistance, and
Electric capacity, the first end of described electric capacity is connected with described receiving end, the second end ground connection of described electric capacity;
Wherein, described signal transceiver when receiving described supply voltage by described testing resistance to described capacitor charging and described timer starts timing, when described capacitor charging to the voltage of described electric capacity is greater than the dividing potential drop that described bleeder circuit provides, described timer stops timing, with a time setting value between the timing of described impedance detection circuit more described timer institute, judge whether the impedance of described testing resistance is greater than an impedance higher limit according to comparative result.
2. impedance detection circuit according to claim 1, is characterized in that, described bleeder circuit comprises the first resistance and the second resistance, and the first end of described first resistance is connected with described normal phase input end, and the second end of described first resistance is connected with described earth terminal; The first end of described second resistance is connected with described power end, and the second end of described second resistance is connected with described normal phase input end.
3. impedance detection circuit according to claim 1, is characterized in that, described signal transceiver also comprises the 3rd resistance, and described 3rd resistance is connected between described inverting input and described receiving end.
4. impedance detection circuit according to claim 2, is characterized in that, described signal transceiver also comprises the 4th resistance, and the first end of described 4th resistance is connected with described normal phase input end, and the second end of described 4th resistance is connected with described output terminal.
5. impedance detection circuit according to claim 1, it is characterized in that, described signal transceiver also comprises light emitting diode, described light emitting diode is connected between described power end and described timer, the positive pole of described light emitting diode connects described power end, the negative pole of described light emitting diode connects described timer, and when described lumination of light emitting diode, described timer stops timing.
6. impedance detection circuit according to claim 5, is characterized in that, described signal transceiver also comprises the 5th resistance and the 6th resistance, and described 5th resistance is connected between the positive pole of described power end and described light emitting diode; Described 6th resistance is connected between described power end and described output terminal.
7. impedance detection circuit according to claim 1, is characterized in that, described signal transceiver also comprises diode, and the positive pole of described diode is connected with described receiving end, and the negative pole of described diode is connected with described transmitting terminal.
8. a display pick-up unit, the flexible circuit board comprising printed circuit board and be connected with described printed circuit board, it is characterized in that, described display pick-up unit comprises the impedance detection circuit as described in any one of claim 1-7, and the binding place of described flexible circuit board and described printed circuit board is formed binds impedance and be defined as the testing resistance that described impedance detection circuit detects.
9. according to display pick-up unit as claimed in claim 8, it is characterized in that, signal transceiver and the described electric capacity of described impedance detection circuit are arranged on described printed circuit board.
10. a display detection method, for adopting the impedance of the testing resistance on an impedance detection circuit detection display device, it is characterized in that, described impedance detection circuit comprises signal transceiver and electric capacity, described signal transceiver comprises voltage comparator and timer, described voltage comparator comprises normal phase input end, inverting input, power end, earth terminal and output terminal, and described display detection method comprises the following steps:
When described signal transceiver receives supply voltage to described capacitor charging and described timer starts timing;
When described voltage comparator anti-phase input terminal voltage is greater than normal phase input end voltage, described timer stops timing;
Judge whether described timer is greater than a time setting value between clocking; And
Judge whether the impedance of described testing resistance is greater than an impedance higher limit according to comparative result.
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| CN105679216B (en) * | 2016-01-04 | 2018-05-22 | 京东方科技集团股份有限公司 | The detection device and detection method of a kind of display device |
| CN106443192A (en) * | 2016-10-31 | 2017-02-22 | 昆山国显光电有限公司 | Detection device and detection method for binding impedance of display screen |
| CN110089200A (en) * | 2016-12-15 | 2019-08-02 | 欧姆龙株式会社 | Navigation lamp control system, illuminating lamp control system and switch unit |
| CN109935181A (en) * | 2017-12-19 | 2019-06-25 | 上海和辉光电有限公司 | A kind of driving circuit, the method and display for detecting connecting component impedance |
| CN109038692A (en) * | 2018-06-27 | 2018-12-18 | 浙江大华技术股份有限公司 | A kind of power supply unit |
| CN111261089A (en) * | 2020-03-04 | 2020-06-09 | Tcl华星光电技术有限公司 | Display device and electronic apparatus |
| CN111261089B (en) * | 2020-03-04 | 2021-07-27 | 苏州华星光电技术有限公司 | Display device and electronic apparatus |
| US11315451B1 (en) | 2020-03-04 | 2022-04-26 | Tcl China Star Optoelectronics Technology Co., Ltd. | Display device and electronic device |
| CN112201188A (en) * | 2020-10-28 | 2021-01-08 | 南京中电熊猫液晶显示科技有限公司 | Display device and automatic detection method for binding of source chip thereof |
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