CN203415210U - Multi-voltage output liquid crystal display module driving system - Google Patents
Multi-voltage output liquid crystal display module driving system Download PDFInfo
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- CN203415210U CN203415210U CN201320507590.8U CN201320507590U CN203415210U CN 203415210 U CN203415210 U CN 203415210U CN 201320507590 U CN201320507590 U CN 201320507590U CN 203415210 U CN203415210 U CN 203415210U
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- crystal display
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- control mcu
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Abstract
The utility model relates to a multi-voltage output liquid crystal display module driving system, which comprises a main control MCU, a power conversion circuit, a multichannel relay circuit, an infrared human body sensing switch interface, a liquid crystal display module to be tested, a communication interface and an upper computer. The multi-voltage output liquid crystal display module driving system is characterized in that the main control MCU is communicated with the upper computer through the communication interface; the main control MCU is connected with the power conversion circuit and the multichannel relay circuit, the multichannel relay circuit is connected with the liquid crystal display module to be tested, the infrared human body sensing switch interface is connected with the main control MCU, and the communication interface is an RS232 conversion circuit. Compared with the prior art, the beneficial effect is that the system provided by the utility model is convenient and efficient, simple in structure, safe, reliable and wide in application prospect.
Description
Technical field
The utility model relates to detection field, especially a kind of multivoltage output liquid crystal display module drive system.
Background technology
Inner in each liquid crystal display module manufacturing enterprise, no matter be the online detection on production line, or the final detection before product export, all need whether the quality of product is reached to requirement and carry out strict differentiation.And in machine, equipment, instrument, instrument as human-computer interaction interface, widely apply the enterprise of liquid crystal display module, the requirement that often also will whether meet application to product when product supplied materials detects.For some fairly simple products, testing circuit or test condition are often also fairly simple.After powering up, with single-chip microcomputer, to the inside, write different test datas, just can realize the detection of indices.But some module needs outside that VLCD is provided, and has plenty of positive voltage, has plenty of negative voltage.Also the backlight of some module also has special requirement to power supply, also has the forms backlight such as CCFL, EL except high direct voltage is backlight.For above-mentioned these modules, can not simply like this go to detect.
Electric sequence and the power down sequence of this module Dui Ge road voltage have strict requirement.Their voltage backlight can provide before VDD, and VLCD voltage not only requires outside to provide, and while powering on, also need to after other power supply of module has all been stablized, just can provide this voltage in time, just in time contrary during power-off.To the detection of this series products, be a difficult problem for industry, especially, in the production run of product, former detection method often causes a large amount of artificial damages to product in testing process.
Utility model content
The purpose of this utility model is to provide a kind of multivoltage output liquid crystal display module drive system, by the mode of software control relay, realize the control of Dui Ge road voltage, user can be according to the host computer instruction receiving, the steering order that adds Dui Ge road voltage in the normal test procedure of product, according to the needs that detect module, each road voltage of free switch, realizes the detection of module.Have advantages of convenient and swift, safe and reliable.
For achieving the above object, the utility model is realized by the following technical solutions:
A kind of multivoltage output liquid crystal display module drive system, comprise main control MCU, power-switching circuit, multicircuit relay circuit, infrared human body inductive switch, liquid crystal display module to be measured, communication interface, host computer, it is characterized in that, described main control MCU is by communication interface and upper machine communication; Main control MCU is connected with multicircuit relay circuit with power-switching circuit respectively, and multicircuit relay circuit is connected with liquid crystal display module to be measured, and infrared human body inductive switch is connected with main control MCU.
Described communication interface is RS232 change-over circuit.
Compared with prior art, the beneficial effects of the utility model are:
This system is convenient and swift, simple in structure, safe and reliable, has a extensive future.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the function of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further illustrated:
As shown in Figure 1, a kind of multivoltage output liquid crystal display module drive system, by main control MCU, power-switching circuit, multicircuit relay circuit, infrared human body inductive switch, liquid crystal display module to be measured, RS232 change-over circuit and host computer, formed, it is characterized in that, described main control MCU is by RS232 change-over circuit and upper machine communication; Main control MCU is connected with multicircuit relay circuit with power-switching circuit respectively, and multicircuit relay circuit is connected with liquid crystal display module to be measured, and infrared human body inductive switch is connected with main control MCU.
The 51 series monolithic STC89LE516RD+ that Shi You STC Corporation that the utility model main control MCU adopts produces.Main control MCU is connected with host computer by RS232 change-over circuit interface, receives at any time the instruction of host computer.The external a plurality of triodes of main control MCU, multicircuit relay circuit, be used for controlling the logical and disconnected of the required Ge of liquid crystal display module to be measured road voltage; Control each I/O mouth of liquid crystal display module simultaneously, according to the instruction of host computer, write various detection data, realize the detection picture needing.Relay is a kind of electric control device, and it has control system and by control system, coil and contact sets two parts, consists of.The utility model is exactly the characteristic of having used its this controllable switching, according to the needs of tested module, with it, controls the switch of each road voltage.
First the utility model is with a 24V transformer input DC power, then in system, with a plurality of mu balanced circuits, becomes multiple power supplies such as the required power supply of main control MCU one tunnel, the required power supply of multicircuit relay circuit one tunnel, module group backlight power supply three tunnels (direct current, EL, CCFL), module power supply one tunnel, module VLCD power supply one tunnel.
After main control MCU powers up, postpone certain hour.After the power supply output of Ge road reaches and stablizes, after main control MCU initialization, enter and wait for host computer command status.Then according to the host computer instruction of receiving, press the sequence power on of module " backlight electric power-> module power supply-> module VLCD power supply ".In adding electric process, there is certain time delay.After having powered up, then start the mouth by I/O, in liquid crystal display module, write the test data needing.Meanwhile, main control MCU also can send one group of reply data to host computer, and presentation directives is complete.
Whether now can on liquid crystal display module, observe the picture showing meets the requirements.If host computer is provided with Machine Vision Inspecting System, can also to display effect, verify with software.
After having carried out all tests, system can be given module power-off automatically by the order of " module VLCD power supply-> module power supply-> module group backlight power supply ".After power-off, module can be taken off, according to whether meeting the requirements, be included into different classes of in.And then put another liquid crystal display module, and click and start to detect key, start to detect next time.
In system, designed infrared human body inductive switch interface, prevented that workman's tested fixture in the process that picks and places module operation from jamming a finger.
Claims (2)
1. a multivoltage is exported liquid crystal display module drive system, comprise main control MCU, power-switching circuit, multicircuit relay circuit, infrared human body inductive switch, liquid crystal display module to be measured, communication interface, host computer, it is characterized in that, described main control MCU is by communication interface and upper machine communication; Main control MCU is connected with multicircuit relay circuit with power-switching circuit respectively, and multicircuit relay circuit is connected with liquid crystal display module to be measured, and infrared human body inductive switch is connected with main control MCU.
2. a kind of multivoltage output liquid crystal display module drive system according to claim 1, is characterized in that, described communication interface is RS232 change-over circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507590.8U CN203415210U (en) | 2013-08-16 | 2013-08-16 | Multi-voltage output liquid crystal display module driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507590.8U CN203415210U (en) | 2013-08-16 | 2013-08-16 | Multi-voltage output liquid crystal display module driving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203415210U true CN203415210U (en) | 2014-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320507590.8U Expired - Fee Related CN203415210U (en) | 2013-08-16 | 2013-08-16 | Multi-voltage output liquid crystal display module driving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203415210U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090153A (en) * | 2014-06-18 | 2014-10-08 | 武汉精测电子技术股份有限公司 | Detection system and detection method of liquid crystal module multi-channel power supply |
-
2013
- 2013-08-16 CN CN201320507590.8U patent/CN203415210U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090153A (en) * | 2014-06-18 | 2014-10-08 | 武汉精测电子技术股份有限公司 | Detection system and detection method of liquid crystal module multi-channel power supply |
| CN104090153B (en) * | 2014-06-18 | 2017-02-15 | 武汉精测电子技术股份有限公司 | Detection system and detection method of liquid crystal module multi-channel power supply |
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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 |
Granted publication date: 20140129 Termination date: 20210816 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |