CN205263572U - Multi-path impedance test control device - Google Patents
Multi-path impedance test control device Download PDFInfo
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- CN205263572U CN205263572U CN201521064975.7U CN201521064975U CN205263572U CN 205263572 U CN205263572 U CN 205263572U CN 201521064975 U CN201521064975 U CN 201521064975U CN 205263572 U CN205263572 U CN 205263572U
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- impedance
- comparison circuit
- microcontroller
- electronic switch
- control device
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 230000006698 induction Effects 0.000 claims description 7
- 230000000692 anti-sense effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005530 etching Methods 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model is suitable for a touch-sensitive screen detects technical field, provides a multichannel impedance test controlling means, including impedance comparison circuit, microcontroller and display element, form a plurality of impedance detection passageways for controllable connection between each response electrode or the drive electrode of the sensor that impedance comparison circuit and needs to detect for the impedance data of this way impedance detection passageway that is used for receiving the controlled switch-on compare with reference voltage; the microcontroller is connected with the impedance comparison circuit and is used for controlling the connection of each impedance detection channel; and the display unit is connected with the microcontroller and is used for outputting the detection result of each impedance detection channel. The whole testing process of the multi-path impedance testing control device can realize automatic detection, the detection efficiency is high, and the multi-path impedance testing control device is simple and practical.
Description
Technical field
The utility model belongs to touch-screen detection technique field, relates in particular to a kind of multichannel testing impedance control device.
Background technology
In touch field, the control of touch-screen is had to multiple implementation, current popular capacitive strain formula touch technology (being capacitance touch screen) is exactly a kind of implementation wherein. Capacitive touch screen is mainly to realize by sensor (SENSOR) functional sheet, sensor is mainly by etching ITO (Indium-TinOxide, Indium-tin Oxide Transparent Conductive Film) glass and increase line related and complete, sensor function sheet is the critical piece of touch-screen.
In the production of capacitance touch screen, the main bad driving that all comes from sensor, the short circuit problem of induction electrode inside. Equally, in LCD (LiquidCrystalDisplay, liquid crystal display) white and black displays field, the SEG line (being carrier frequency line) of LCD functional sheet, the etching of COM line (being output line) be bad also mainly comes from short circuit. At present also do not have simple short circuit or impedance comparison testing jig to carry out its inner short circuit problem of fast detecting.
Utility model content
Technical problem to be solved in the utility model aims to provide a kind of simple, efficient multichannel testing impedance control device.
The utility model is to realize like this, a kind of multichannel testing impedance control device, comprise impedance comparison circuit, microcontroller and display unit, between each induction electrode of sensor that described impedance comparison circuit and needing detects or drive electrode, be connected to form multiple impedance detection passages for controlled, for receive controlled turn-on the anti-sense channel of this roadlock impedance data and compare with reference voltage; Described microcontroller is connected with described impedance comparison circuit, for controlling the connection of each impedance detection passage; Described display unit is connected with described microcontroller, for the testing result of each impedance detection passage is exported.
Further, described impedance comparison circuit comprises power supply, electronic switching circuit and comparison circuit;
Described electronic switching circuit has the electronic switch of multiple changeable impedance detection passages, and each electronic switch all has a controlled end; The first end of each electronic switch is all connected with described power supply, and the second end of each electronic switch is connected with described comparison circuit, and the controlled end of each electronic switch is connected with described multiple impedance detection passages respectively; The controlled end of each switching circuit is connected with described microcontroller, realizes the switching of detected passage between power supply and comparison circuit under the control of described microcontroller.
Further, described comparison circuit comprises amplifier comparator, the reverse inter-input-ing ending grounding of described amplifier comparator, and in-phase input end connects the first end of each electronic switch, and output connects described microcontroller.
Further, described comparison circuit also comprises comparison resistance, and one end of described comparison resistance is connected with the second end of described each electronic switch, the other end ground connection of described comparison resistance.
Further, described impedance comparison circuit also comprises reference voltage, and the inverting input of described amplifier comparator is by described reference voltage ground connection.
The utility model compared with prior art, beneficial effect is: each induction electrode or the drive electrode of the sensor that described multichannel testing impedance control device detects needs are connected respectively in impedance comparison circuit, impedance comparison circuit can detect the situation of impedance automatically in conjunction with microcontroller, then testing result is shown by display unit, whole test process can be realized automation and efficient, meanwhile, multichannel testing impedance control device is simple and practical.
Brief description of the drawings
Fig. 1 is a kind of electrical block diagram of the utility model multichannel testing impedance control device.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of multichannel testing impedance control device, comprises impedance comparison circuit 30, microcontroller 20 and display unit 10. Controlledly between each induction electrode of sensor that impedance comparison circuit 30 and needing detects or drive electrode be connected to form multiple impedance detection passages, for receive controlled turn-on the anti-sense channel of this roadlock impedance data and compare with reference voltage. Microcontroller 20 is connected with impedance comparison circuit 30, for controlling the connection of each impedance detection passage. Display unit 10 is connected with microcontroller 20, for the testing result of each impedance detection passage is exported.
As shown in Figure 1, impedance comparison circuit 30 comprises power supply 301, electronic switching circuit and comparison circuit to a kind of embodiment of impedance comparison circuit. Electronic switching circuit has the electronic switch of multiple changeable impedance detection passages, such as, electronic switch 1, electronic switch 2, electronic switch 3 ... electronic switch n. Each electronic switch all has a controlled end. The first end of each electronic switch is all connected with power supply 301, and the second end of each electronic switch is connected with comparison circuit, and the controlled end of each electronic switch is connected with multiple impedance detection passages respectively. Such as, the controlled end of electronic switch 1 is connected with impedance detection passage 1, and the controlled end of electronic switch 2 is connected with impedance detection passage 2, and the controlled end of electronic switch 3 is connected with impedance detection passage 3, and the controlled end of electronic switch n is connected with impedance detection passage n. The controlled end of each switching circuit is connected with microcontroller 20, realizes the switching of detected passage between power supply 301 and comparison circuit under the control of microcontroller 20. Comparison circuit comprises amplifier comparator 302, comparison resistance R2 and reference voltage. The reverse inter-input-ing ending grounding of amplifier comparator 302, in-phase input end connects the first end of each electronic switch, and output connects microcontroller 20. Or the second end of each electronic switch is by comparison resistance R2 ground connection, the inverting input of amplifier comparator 302 is by reference to voltage ground connection.
In the time that each induction electrode to sensor or drive electrode detect, such as, need to detect impedance detection passage 1 time, the controlled end that microcontroller 20 is controlled electronic switch 1 is connected to the first end of electronic switch 1, simultaneously, the controlled end that microcontroller 20 is controlled other electronic switch is connected to the second end of corresponding each electronic switch, comparison circuit according to this impedance detection passage detecting, to microcontroller 20, then exported the result detecting by display unit 10 by short circuit output high level signal or low level signal. In the time having short circuit between a certain impedance detection passage detecting and other passages, the resistance of this passage can be very little, now comparator+input terminal voltage is greater than input, comparator is just exported high level like this, microcontroller 20 can fast detecting to this high level and passage short circuit detected, detect thereby realize efficiently.
The babble electrode that multichannel testing impedance control device of the present utility model detects needs is connected respectively in impedance comparison circuit 30, impedance comparison circuit 30 can detect the situation of impedance automatically in conjunction with microcontroller 20, then testing result is shown by display unit 10, can solve between two electrodes and the test problem of impedance between multiple electrode, whole test process can realize automation detection and detection efficiency high, the sensitivity of test can artificially be set. Described multichannel testing impedance control device is simple and practical, can and drive passage to carry out function testing impedance, each electrode of LCD is carried out to impedance comparison test etc. to the induction in the sensor of touch-screen, can also be generalized to as required other application.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a multichannel testing impedance control device, it is characterized in that, comprise impedance comparison circuit, microcontroller and display unit, between each induction electrode of sensor that described impedance comparison circuit and needing detects or drive electrode, be connected to form multiple impedance detection passages for controlled, for receive controlled turn-on the anti-sense channel of this roadlock impedance data and compare with reference voltage; Described microcontroller is connected with described impedance comparison circuit, for controlling the connection of each impedance detection passage; Described display unit is connected with described microcontroller, for the testing result of each impedance detection passage is exported.
2. multichannel testing impedance control device according to claim 1, is characterized in that, described impedance comparison circuit comprises power supply, electronic switching circuit and comparison circuit;
Described electronic switching circuit has the electronic switch of multiple changeable impedance detection passages, and each electronic switch all has a controlled end; The first end of each electronic switch is all connected with described power supply, and the second end of each electronic switch is connected with described comparison circuit, and the controlled end of each electronic switch is connected with described multiple impedance detection passages respectively; The controlled end of each switching circuit is connected with described microcontroller, realizes the switching of detected passage between power supply and comparison circuit under the control of described microcontroller.
3. multichannel testing impedance control device according to claim 2, it is characterized in that, described comparison circuit comprises amplifier comparator, the reverse inter-input-ing ending grounding of described amplifier comparator, in-phase input end connects the first end of each electronic switch, and output connects described microcontroller.
4. multichannel testing impedance control device according to claim 3, is characterized in that, described comparison circuit also comprises comparison resistance, and one end of described comparison resistance is connected with the second end of described each electronic switch, the other end ground connection of described comparison resistance.
5. according to the multichannel testing impedance control device described in claim 3 or 4, it is characterized in that, described impedance comparison circuit also comprises reference voltage, and the inverting input of described amplifier comparator is by described reference voltage ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064975.7U CN205263572U (en) | 2015-12-18 | 2015-12-18 | Multi-path impedance test control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064975.7U CN205263572U (en) | 2015-12-18 | 2015-12-18 | Multi-path impedance test control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205263572U true CN205263572U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521064975.7U Active CN205263572U (en) | 2015-12-18 | 2015-12-18 | Multi-path impedance test control device |
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| Country | Link |
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| CN (1) | CN205263572U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771624A (en) * | 2017-02-20 | 2017-05-31 | 中国电子产品可靠性与环境试验研究所 | Interconnection resistance on-line monitoring system and method |
| CN106814295A (en) * | 2017-03-17 | 2017-06-09 | 常州瑞神安医疗器械有限公司 | A kind of multi-channel circuit test device and brain depth electrode method of testing |
-
2015
- 2015-12-18 CN CN201521064975.7U patent/CN205263572U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771624A (en) * | 2017-02-20 | 2017-05-31 | 中国电子产品可靠性与环境试验研究所 | Interconnection resistance on-line monitoring system and method |
| CN106771624B (en) * | 2017-02-20 | 2019-10-18 | 中国电子产品可靠性与环境试验研究所 | Interconnection resistance on-line monitoring system and method |
| CN106814295A (en) * | 2017-03-17 | 2017-06-09 | 常州瑞神安医疗器械有限公司 | A kind of multi-channel circuit test device and brain depth electrode method of testing |
| CN106814295B (en) * | 2017-03-17 | 2023-04-07 | 常州瑞神安医疗器械有限公司 | Multi-channel circuit testing device and deep brain electrode testing method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000, 39 Jin Yuan Road, Henggang street, Shenzhen street, Longgang District, Guangdong, China Patentee after: Akita Shenzhen microelectronics Limited by Share Ltd Address before: 518000, 39 Jin Yuan Road, Henggang street, Shenzhen street, Longgang District, Guangdong, China Patentee before: Shenzhen AV-Display Co., Ltd. |