CN103871340A - Detecting device for signal interface - Google Patents
Detecting device for signal interface Download PDFInfo
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- CN103871340A CN103871340A CN201410081484.7A CN201410081484A CN103871340A CN 103871340 A CN103871340 A CN 103871340A CN 201410081484 A CN201410081484 A CN 201410081484A CN 103871340 A CN103871340 A CN 103871340A
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- 230000011664 signaling Effects 0.000 claims description 82
- 238000001514 detection method Methods 0.000 claims description 25
- 238000010586 diagram Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 101100438536 Nicotiana plumbaginifolia CABC gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention provides a detecting device for a signal interface. The detecting device for the signal interface comprises a short circuit detecting module which is used for detecting if a first to-be-detected signal interface is short-circuited; the short circuit detecting module comprises a voltage supplying unit, a voltage comparing unit and a display unit; the voltage supplying unit is used for supplying a first voltage to a first end of the first to-be-detected signal interface and supplying a second voltage to a second end of the first to-be-detected signal interface; the first voltage is higher than the second voltage; the voltage comparing unit is used for comparing the voltage at the first end of the first to-be-detected signal interface with a preset voltage and outputting a comparison signal; the display unit is used for displaying a detecting result of the short circuit detecting module according to the comparison signal. The detecting device for the signal interface, provided by the invention has the advantages of simple structure, convenience in use, capability of quickly finding a specific short-circuited circuit, low detecting cost and high efficiency.
Description
Technical field
The present invention relates to demonstration field, relate in particular to a kind of signaling interface pick-up unit.
Background technology
In recent years, along with the fast development of display technique, various display device are come into people's life, mobile phone, digital camera, notebook, computer, TV is all an indispensable part in people's Working Life, and in said apparatus, liquid crystal module is one of its important component part, in liquid crystal module, there are some signaling interfaces at present, such as TE interface (Tearing Effect Output Signal, be the synchronizing signal between display screen and main control module) and CABC(Content Adaptive Brightness Control, adaptive backlight brilliance control) interface liquid crystal module show in inoperative, but in mobile terminal, but need to use, if there is short circuit or situation about opening circuit in these signaling interfaces, can cause the situation of " undetected " to occur, have a strong impact on user's use.
In sum, a kind of signaling interface pick-up unit simple in structure, easy to use urgently provides.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is to provide a kind of signaling interface pick-up unit simple in structure, easy to use.
(2) technical scheme
For solving the problems of the technologies described above, technical scheme of the present invention provides a kind of signaling interface pick-up unit, whether comprise short-circuit detecting module, be short-circuited for detection of the first signaling interface to be detected, described short-circuit detecting module comprises the unit of exerting pressure, voltage comparison unit and display unit;
The described unit of exerting pressure, for the first end of described the first signaling interface to be detected is applied to the first voltage, applies second voltage to the second end of described the first signaling interface to be detected, and described the first voltage is greater than described second voltage;
Described voltage comparison unit, for the voltage of the first end of described the first signaling interface to be detected and predeterminated voltage are compared, is exported comparison signal;
Described display unit is for showing the result that described short-circuit detecting module detects according to described comparison signal.
Further, the described unit of exerting pressure comprises the first resistance, one end of described the first resistance connects the input end of power supply, and the other end of described the first resistance is for connecting the first end of described the first signaling interface to be detected, the second end ground connection of described the first signaling interface to be detected.
Further, described the first resistance is slide rheostat.
Further, described short-circuit detecting module also comprises predeterminated voltage output unit, for inputting described predeterminated voltage to described voltage comparison unit, described predeterminated voltage output unit comprises the second resistance and the 3rd resistance, one end of described the second resistance connects the input end of power supply, the other end of described the second resistance is for connecting one end of described the 3rd resistance and input described predeterminated voltage to described voltage comparison unit, the other end ground connection of described the 3rd resistance.
Further, described short-circuit detecting module also comprises amplifying unit, for the comparison signal of described voltage comparison unit output is amplified.
Further, described display unit comprises the 4th resistance, the first triode and a LED lamp, one end of described the 4th resistance connects the input end of power supply, the other end of described the 4th resistance connects one end of a described LED lamp, the other end of a described LED lamp connects the emitter of described the first triode, the grounded collector of described the first triode, the base stage of described the first triode is for receiving the comparison signal of described voltage comparison unit output.
Further, described short-circuit detecting module is multiple.
Further, also comprise the detection module that opens circuit, whether open circuit for detection of the second signaling interface to be detected, the described detection module that opens circuit comprises the second triode and the 2nd LED lamp, one end of described the 2nd LED lamp connects the input end of power supply, the other end of described the 2nd LED lamp connects the collector of described the second diode, the grounded emitter of described the second diode, and the ground level of described the second diode is used for connecting described the second signaling interface to be detected.
Further, the detection module that opens circuit described in also comprises the 5th resistance and the 6th resistance;
The ground level of described the second diode connects described the second signaling interface to be detected by described the 5th resistance, and one end of described the 6th resistance connects described the second signaling interface to be detected, the other end ground connection of described the 6th resistance.
Further, the detection module that opens circuit described in is multiple.
(3) beneficial effect
Signaling interface pick-up unit provided by the invention comprises short-circuit detecting module, this short-circuit detecting module applies the first voltage by the unit of exerting pressure to the first end of the first signaling interface to be detected, the second end to the first signaling interface to be detected applies second voltage, by voltage comparison unit, the voltage of the first end of the first signaling interface to be detected and predeterminated voltage are compared, obtain comparative result, and show the result of short-circuit detecting by display unit, it is simple in structure, easy to use, and can find fast the concrete circuit of short circuit, testing cost is low, and efficiency is high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of signaling interface pick-up unit of providing of embodiment of the present invention;
Fig. 2 is the schematic diagram of a kind of short-circuit detecting module of providing of embodiment of the present invention;
Fig. 3 is the schematic diagram of the another kind of signaling interface pick-up unit that provides of embodiment of the present invention;
Fig. 4 is the schematic diagram of a kind of detection module that opens circuit that embodiment of the present invention provides;
Fig. 5 is the schematic diagram of a kind of power module of providing of embodiment of the present invention.
Figure elements explanation: 10-short-circuit detecting module, 20-first signaling interface to be detected, the 30-detection module that opens circuit, 40-second signaling interface to be detected, the 101-unit of exerting pressure, 102-voltage comparison unit, 103-display unit, R1-the first resistance, R2-the second resistance, R3-the 3rd resistance, R4-the 4th resistance, R5-the 5th resistance, R6-the 6th resistance, R7-the 7th resistance, R8-the 8th resistance, M-voltage comparator, L1-the one LED lamp, L2-the 2nd LED lamp, Q1-the first triode, Q2-the second triode, 501-direct supply input interface, 502-diode.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is the schematic diagram of a kind of signaling interface pick-up unit of providing of embodiment of the present invention, comprise short-circuit detecting module 10, whether be short-circuited for detection of the first signaling interface 20 to be detected, described short-circuit detecting module comprises the unit 101 of exerting pressure, voltage comparison unit 102 and display unit 103;
The described unit 101 of exerting pressure, for the first end of described the first signaling interface 20 to be detected is applied to the first voltage, applies second voltage to the second end of described the first signaling interface 20 to be detected, and described the first voltage is greater than described second voltage;
Described voltage comparison unit 102, for the voltage of the first end of described the first signaling interface 20 to be detected and predeterminated voltage are compared, is exported comparison signal;
Described display unit 103 detects 10 result for show described short-circuit detecting module according to described comparison signal.
The signaling interface pick-up unit that embodiment of the present invention provides comprises short-circuit detecting module, this short-circuit detecting module applies the first voltage by the unit of exerting pressure to the first end of the first signaling interface to be detected, the second end to the first signaling interface to be detected applies second voltage, by voltage comparison unit, the voltage of the first end of the first signaling interface to be detected and predeterminated voltage are compared, obtain comparative result, and show the result of short-circuit detecting by display unit, it is simple in structure, easy to use, and can find fast the concrete circuit of short circuit, testing cost is low, efficiency is high.
Referring to Fig. 2, Fig. 2 is the schematic diagram of a kind of short-circuit detecting module of providing of embodiment of the present invention, comprise the unit of exerting pressure, voltage comparison unit and display unit, wherein, the described unit of exerting pressure comprises the first resistance R 1, one end of the first resistance R 1 connects the input end VCC of power supply, and the other end of the first resistance R 1 is for connecting the first end of the first signaling interface 20 to be detected, the second end ground connection of the first signaling interface 20 to be detected.Voltage comparison unit is voltage comparator M, it can be for example LM311 voltage comparator, the pin 1 of voltage comparator M and pin 4 ground connection, pin 3 is connected the voltage of the first end that obtains the first signaling interface 20 to be detected with the first end of the first signaling interface 20 to be detected, pin 2 is for inputting predeterminated voltage, pin 8 connects the input end VCC of power supply, and pin 7 is for exporting comparison signal.
Preferably, described short-circuit detecting module also comprises predeterminated voltage output unit, for inputting predeterminated voltage to described voltage comparison unit, referring to Fig. 2, predeterminated voltage output unit comprises the second resistance R 2 and the 3rd resistance R 3, one end of the second resistance R 2 connects the input end VCC of power supply, the other end of the second resistance R 2 connects one end of the 3rd resistance R 3, the other end of the second resistance R 2 also connects the pin 2 of voltage comparator M to input predeterminated voltage to voltage comparator M, the other end ground connection of the 3rd resistance R 2, particularly, can be by regulating the resistance of the second resistance R 2 and the 3rd resistance R 3 to change predeterminated voltage, for example, can make R2=R3, can make the predeterminated voltage of voltage comparator M input is 0.5V
cC.
Preferably, described short-circuit detecting module also comprises amplifying unit, for the comparison signal of described voltage comparison unit output is amplified.Referring to Fig. 2, this amplifying unit comprises that one end of the 7th resistance R 7, the seven resistance R 7 connects the input end VCC of power supply, and the other end is connected that with the pin 7 of voltage comparator M the signal of voltage comparator M output is amplified.
Wherein, display unit comprises the 4th resistance R 4, the first triode Q1 and a LED lamp L1, wherein, the first triode Q1 can adopt positive-negative-positive triode, particularly, one end of the 4th resistance R 4 connects the input end VCC of power supply, the other end of the 4th resistance R 4 connects one end of a LED lamp L1, the other end of the one LED lamp L1 connects the emitter of the first triode Q1, the grounded collector of the first triode Q1, the base stage of the first triode Q1 is connected the comparison signal with receiver voltage comparer M output with the pin 7 of voltage comparator M.
Particularly, first the first end of the first signaling interface to be detected is accessed to the other end of the first resistance R 1, and by the second end ground connection of the first signaling interface to be detected, if this first signaling interface to be detected is not short-circuited, the negative level of the pin 3(of voltage comparator M) input voltage be V
cC, and the input voltage of the pin 2 (positive pole) of voltage comparator M is 0.5V by R2 and R3 dividing potential drop
cC(R2=R3), the large pressure of the pin 3 of voltage comparator M is greater than the voltage of pin 2, and the comparison signal that pin 7 is exported is low level, and the ground level of the first triode Q1 is low level, and a LED lamp L1 extinguishes.If measured signal port is short-circuited, the negative level of voltage comparator M pin 3() input voltage be 0V, and the input voltage of the pin 2 (positive pole) of voltage comparator M is 0.5V by R2 and R3 dividing potential drop
cC(R2=R3), the large pressure of the pin 3 of voltage comparator M is less than the voltage of pin 2, and the comparison signal that pin 7 is exported is high level, and the first triode Q1 switch is unlocked, and a LED lamp L1 is lighted.
Preferably, the first resistance R 1 can also be made as to slide rheostat.Be short-circuited if detect the first signaling interface to be detected, can after this resistance by change R1, test respectively, thereby detect the short circuit resistance that obtains the first signaling interface to be detected.In addition, this first resistance R 1 can also be replaced with to resistance box, so that test the short circuit resistance of this first signaling interface to be detected.
Preferably, the short-circuit detecting module in this signaling interface pick-up unit can be multiple, to test multiplex circuit simultaneously.
Referring to Fig. 3, Fig. 3 is the schematic diagram of the another kind of signaling interface pick-up unit that provides of embodiment of the present invention, comprise above-mentioned short-circuit detecting module 10, whether be short-circuited for detection of the first signaling interface 20 to be detected, also comprise the detection module 30 that opens circuit, whether open circuit for detection of the second signaling interface 40 to be detected, referring to Fig. 4, the described detection module that opens circuit comprises the second triode Q2 and the 2nd LED lamp L2, wherein, this second triode Q2 can be NPN type triode, one end of the 2nd LED lamp L2 connects the input end VCC of power supply by the 9th resistance R 9, the other end of described the 2nd LED lamp L2 connects the collector of described the second diode Q2, the grounded emitter of described the second diode Q2, the ground level of described the second diode Q2 is used for connecting described the second signaling interface to be detected.
Preferably, the above-mentioned detection module that opens circuit also comprises the 5th resistance R 5 and the 6th resistance R 6; Wherein, the ground level of described the second diode Q2 connects described the second signaling interface 40 to be detected by described the 5th resistance R 5, one end of the 6th resistance R 6 connects described the second signaling interface 40 to be detected, the other end ground connection of the 6th resistance R 6, by the 5th resistance R 5 and the 6th resistance R 6 being set between the second diode Q2 and the second signaling interface 40 to be detected, can effectively prevent that the electric current of exporting due to the second signaling interface 40 to be detected is excessive, and the second diode Q2 is caused damage.Particularly, first the ground level that the second signaling interface to be detected is connected to the second diode Q2 by the 5th resistance R 5, in the time that opening circuit appears in the second signaling interface to be detected, the ground level of the second diode Q2 is low level, between collector and emitter, disconnect, the 2nd LED lamp L2 does not work; When the second signaling interface to be detected is when normal, the ground level of the second diode Q2 is high level, between collector and emitter, connects, and the 2nd LED lamp L2 lights.
The detection module that opens circuit in this signaling interface pick-up unit can be for multiple, so as can be simultaneously to the multiplex circuit detection of opening circuit.
Wherein, this signaling interface pick-up unit also comprises power module, power module is powered to this signaling interface pick-up unit by the input end VCC of power supply, referring to Fig. 5, this power module comprises direct supply input interface 501 and diode 502, wherein, direct supply input interface 501 is for input direct voltage, for example, can input 5V DC voltage, the pin 1 of this direct supply input interface 501 and pin 2 ground connection, pin 3 is connected with one end of diode 502, the other end of diode 502 is connected with the input end VCC of power supply, by diode 502 is set, can effectively prevent that electric current from pouring in down a chimney, thereby play a protective role.
The signaling interface pick-up unit that embodiment of the present invention provides comprises short-circuit detecting module and the detection module that opens circuit, can carry out short-circuit detecting to the first signaling interface to be detected by short-circuit detecting module, by the detection module that opens circuit to the detection of opening circuit of the second signaling interface to be detected, it is simple in structure, easy to use, and the concrete circuit that can find fast short circuit and open circuit, testing cost is low, and efficiency is high.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. whether a signaling interface pick-up unit, is characterized in that, comprises short-circuit detecting module, be short-circuited for detection of the first signaling interface to be detected, and described short-circuit detecting module comprises the unit of exerting pressure, voltage comparison unit and display unit;
The described unit of exerting pressure, for the first end of described the first signaling interface to be detected is applied to the first voltage, applies second voltage to the second end of described the first signaling interface to be detected, and described the first voltage is greater than described second voltage;
Described voltage comparison unit, for the voltage of the first end of described the first signaling interface to be detected and predeterminated voltage are compared, is exported comparison signal;
Described display unit is for showing the result that described short-circuit detecting module detects according to described comparison signal.
2. signaling interface pick-up unit according to claim 1, it is characterized in that, the described unit of exerting pressure comprises the first resistance, one end of described the first resistance connects the input end of power supply, the other end of described the first resistance is for connecting the first end of described the first signaling interface to be detected, the second end ground connection of described the first signaling interface to be detected.
3. signaling interface pick-up unit according to claim 2, is characterized in that, described the first resistance is slide rheostat.
4. signaling interface pick-up unit according to claim 1, it is characterized in that, described short-circuit detecting module also comprises predeterminated voltage output unit, for inputting described predeterminated voltage to described voltage comparison unit, described predeterminated voltage output unit comprises the second resistance and the 3rd resistance, one end of described the second resistance connects the input end of power supply, the other end of described the second resistance is for connecting one end of described the 3rd resistance and input described predeterminated voltage to described voltage comparison unit, the other end ground connection of described the 3rd resistance.
5. signaling interface pick-up unit according to claim 1, is characterized in that, described short-circuit detecting module also comprises amplifying unit, for the comparison signal of described voltage comparison unit output is amplified.
6. signaling interface pick-up unit according to claim 1, it is characterized in that, described display unit comprises the 4th resistance, the first triode and a LED lamp, one end of described the 4th resistance connects the input end of power supply, the other end of described the 4th resistance connects one end of a described LED lamp, the other end of a described LED lamp connects the emitter of described the first triode, the grounded collector of described the first triode, the base stage of described the first triode is for receiving the comparison signal of described voltage comparison unit output.
7. signaling interface pick-up unit according to claim 1, is characterized in that, described short-circuit detecting module is multiple.
8. according to the arbitrary described signaling interface pick-up unit of claim 1 to 7, it is characterized in that, also comprise the detection module that opens circuit, whether open circuit for detection of the second signaling interface to be detected, the described detection module that opens circuit comprises the second triode and the 2nd LED lamp, one end of described the 2nd LED lamp connects the input end of power supply, the other end of described the 2nd LED lamp connects the collector of described the second diode, the grounded emitter of described the second diode, the ground level of described the second diode is used for connecting described the second signaling interface to be detected.
9. signaling interface pick-up unit according to claim 8, is characterized in that, described in the detection module that opens circuit also comprise the 5th resistance and the 6th resistance;
The ground level of described the second diode connects described the second signaling interface to be detected by described the 5th resistance, and one end of described the 6th resistance connects described the second signaling interface to be detected, the other end ground connection of described the 6th resistance.
10. signaling interface pick-up unit according to claim 8, is characterized in that, described in the detection module that opens circuit be multiple.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410081484.7A CN103871340B (en) | 2014-03-06 | 2014-03-06 | Signaling interface detecting device |
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|---|---|---|---|
| CN201410081484.7A CN103871340B (en) | 2014-03-06 | 2014-03-06 | Signaling interface detecting device |
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| CN103871340A true CN103871340A (en) | 2014-06-18 |
| CN103871340B CN103871340B (en) | 2016-06-29 |
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| CN104614607A (en) * | 2015-01-23 | 2015-05-13 | 加弘科技咨询(上海)有限公司 | Test method and test system |
| WO2017185311A1 (en) * | 2016-04-28 | 2017-11-02 | 华为技术有限公司 | Short-circuit prevention detection device and user terminal |
| CN107516481A (en) * | 2017-08-18 | 2017-12-26 | 京东方科技集团股份有限公司 | Display module protection device and method, test board and display module |
| CN109116179A (en) * | 2018-09-17 | 2019-01-01 | 歌尔股份有限公司 | Handle function tests circuit and handle function test device |
| CN110031742A (en) * | 2018-01-12 | 2019-07-19 | 神讯电脑(昆山)有限公司 | Wiring board connects tin detection circuit |
| CN110244174A (en) * | 2019-06-26 | 2019-09-17 | 上海闻泰信息技术有限公司 | The test circuit of data-interface |
| CN113589202A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Detection circuit and detection device for charging interface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104614607B (en) * | 2015-01-23 | 2017-09-29 | 加弘科技咨询(上海)有限公司 | A kind of method of testing and test system |
| CN104614607A (en) * | 2015-01-23 | 2015-05-13 | 加弘科技咨询(上海)有限公司 | Test method and test system |
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| CN107516481A (en) * | 2017-08-18 | 2017-12-26 | 京东方科技集团股份有限公司 | Display module protection device and method, test board and display module |
| CN110031742A (en) * | 2018-01-12 | 2019-07-19 | 神讯电脑(昆山)有限公司 | Wiring board connects tin detection circuit |
| CN110031742B (en) * | 2018-01-12 | 2022-07-15 | 神讯电脑(昆山)有限公司 | Circuit board tin connection detection circuit |
| CN109116179A (en) * | 2018-09-17 | 2019-01-01 | 歌尔股份有限公司 | Handle function tests circuit and handle function test device |
| CN110244174A (en) * | 2019-06-26 | 2019-09-17 | 上海闻泰信息技术有限公司 | The test circuit of data-interface |
| CN113589202A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Detection circuit and detection device for charging interface |
| CN113589202B (en) * | 2020-04-30 | 2023-01-13 | 华为技术有限公司 | Detection circuit and detection device for charging interface |
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| CN103871340B (en) | 2016-06-29 |
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