CN205230559U - Liquid crystal display test circuit - Google Patents
Liquid crystal display test circuit Download PDFInfo
- Publication number
- CN205230559U CN205230559U CN201521045714.0U CN201521045714U CN205230559U CN 205230559 U CN205230559 U CN 205230559U CN 201521045714 U CN201521045714 U CN 201521045714U CN 205230559 U CN205230559 U CN 205230559U
- Authority
- CN
- China
- Prior art keywords
- singlechip
- chip microcomputer
- circuit
- pin
- output terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a liquid crystal display test circuit, including voltage stabilizing circuit, ampere meter, first singlechip and second single -chip microcomputer, voltage stabilizing circuit's output is connected with the input of ampere meter, and the output and the first singlechip of ampere meter are connected, and first singlechip is connected with second single -chip microcomputer, second single -chip microcomputer and probe connector, be connected with crystal oscillator circuit on first singlechip, second single -chip microcomputer 1 foot ground connection, second single -chip microcomputer's 2 feet and voltage stabilizing circuit's output are connected, and second single -chip microcomputer's 1 foot passes through resistance and is connected second single -chip microcomputer's 3 feet and ohmic connection with second single -chip microcomputer's 18 feet, second single -chip microcomputer's 19 feet and the output of tail tooth circuit are connected. The utility model discloses a circuit can improve the measuring accuracy.
Description
Technical field
The utility model relates to LCDs test circuit.
Background technology
Outsourcing or homemade LCDs, part meeting existing defects, therefore, wants many its to detect before use LCDs, to ensure that installing rear LCDs uses normally.
The method of existing detection LCDs directly LCDs is energized, then by the working condition of visual inspection LCDs, judge that whether LCDs is qualified, this method is not only inconvenient to locate LCDs, likely cause electrical connection properties bad, and not high to its precision detected yet.
Summary of the invention
In order to make the precision of test better, the utility model provides a kind of LCDs test circuit.
For achieving the above object, a kind of LCDs test circuit, comprise mu balanced circuit, reometer, the first single-chip microcomputer and second singlechip, the output terminal of mu balanced circuit is connected with the input end of reometer, the output terminal of reometer is connected with the first single-chip microcomputer, first single-chip microcomputer is connected with second singlechip, and second singlechip is connected with probe; First single-chip microcomputer is connected with crystal oscillating circuit, second singlechip 1 pin ground connection, 2 pin of second singlechip are connected with the output terminal of mu balanced circuit, 1 pin of second singlechip is connected with 18 pin of second singlechip by resistance, 3 pin of second singlechip are connected with resistance, and 19 pin of second singlechip are connected with the output terminal of tail tooth circuit.
Further, switch is provided with at the input end of mu balanced circuit.
Further, between the output terminal and ground of mu balanced circuit, the first electric capacity is provided with.
Further, the first electric capacity is parallel with the second electric capacity.
The beneficial effects of the utility model are:
(1) owing to being connected to resistance on second singlechip, this resistance adjustable liquid crystal display screen to comparison and sharpness, therefore, can improve test precision.
(2) owing to being provided with switch, the break-make of control circuit is therefore facilitated.
(3) owing to being provided with the first electric capacity, therefore, the effect of protecting against shock and filtering can be played.
(4) owing to being provided with the second electric capacity, the effect of filtering can therefore be played.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
A kind of LCDs test circuit, comprises switch 1, mu balanced circuit 2, first electric capacity 3, second electric capacity 4, reometer 5, first single-chip microcomputer 6 and second singlechip 7.Mu balanced circuit 2 adopts LM7805 mu balanced circuit.First single-chip microcomputer adopts MCU8051 single-chip microcomputer.Second singlechip adopts J-LCD20 single-chip microcomputer.
Switch 1 is provided with at the input end of mu balanced circuit 2.The first electric capacity 3 is provided with between the output terminal and ground of mu balanced circuit 2; First electric capacity 3 is parallel with the second electric capacity 4.
The output terminal of mu balanced circuit 2 is connected with the input end of reometer 5, and the output terminal of reometer 5 is connected with the first single-chip microcomputer 6, and 8 pin of the first single-chip microcomputer 6 are connected with 8 pin of second singlechip 7, and second singlechip 7 is connected with probe; First single-chip microcomputer 6 is connected with crystal oscillating circuit 8, second singlechip 1 pin ground connection, 2 pin of second singlechip are connected with the output terminal of mu balanced circuit 2,1 pin of second singlechip is connected with 18 pin of second singlechip by resistance 9,3 pin of second singlechip are connected with resistance 9, and 19 pin of second singlechip are connected with the output terminal of tail tooth circuit.
The principle of work of above-mentioned test circuit is: direct current is input in mu balanced circuit 2 through switch 1, the general direct current input adopting 12V.Be input in the first single-chip microcomputer 6 through voltage stabilizing after-current one tunnel through reometer 5, in 2 pin that another road is input to second singlechip and 19 pin.Powered with the LCDs of probes touch by second singlechip, and gathered the signal of LCDs by second singlechip, read current information by reometer.
In the utility model, owing to being connected to resistance on second singlechip, this resistance adjustable liquid crystal display screen to comparison and sharpness, therefore, can improve test precision.Owing to being provided with switch, therefore facilitate the break-make of control circuit.Owing to being provided with the first electric capacity, therefore, the effect of protecting against shock and filtering can be played, improve measuring accuracy.Owing to being provided with the second electric capacity, therefore can play the effect of filtering, improve measuring accuracy.
Claims (4)
1. a LCDs test circuit, it is characterized in that: comprise mu balanced circuit, reometer, the first single-chip microcomputer and second singlechip, the output terminal of mu balanced circuit is connected with the input end of reometer, the output terminal of reometer is connected with the first single-chip microcomputer, first single-chip microcomputer is connected with second singlechip, and second singlechip is connected with probe; First single-chip microcomputer is connected with crystal oscillating circuit, second singlechip 1 pin ground connection, 2 pin of second singlechip are connected with the output terminal of mu balanced circuit, and 1 pin of second singlechip is connected with 18 pin of second singlechip by resistance, and 3 pin of second singlechip are connected with resistance; 19 pin of second singlechip are connected with the output terminal of tail tooth circuit
.
2. LCDs test circuit according to claim 1, is characterized in that: be provided with switch at the input end of mu balanced circuit
.
3. LCDs test circuit according to claim 1, is characterized in that: between the output terminal and ground of mu balanced circuit, be provided with the first electric capacity
.
4. LCDs test circuit according to claim 3, is characterized in that: on the first electric capacity, be parallel with the second electric capacity
.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521045714.0U CN205230559U (en) | 2015-12-15 | 2015-12-15 | Liquid crystal display test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521045714.0U CN205230559U (en) | 2015-12-15 | 2015-12-15 | Liquid crystal display test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205230559U true CN205230559U (en) | 2016-05-11 |
Family
ID=55905607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521045714.0U Expired - Fee Related CN205230559U (en) | 2015-12-15 | 2015-12-15 | Liquid crystal display test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205230559U (en) |
-
2015
- 2015-12-15 CN CN201521045714.0U patent/CN205230559U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20201215 |