CN201918143U

CN201918143U - Intelligent liquid crystal display module detecting system

Info

Publication number: CN201918143U
Application number: CN201120007003XU
Authority: CN
Inventors: 邢树华; 程万胜; 肖禹; 樊松; 陈小林; 岳伦; 刘辉; 任建
Original assignee: ANSHAN YES OPTOELECTRONICS DISPLAY Co Ltd
Current assignee: ANSHAN YES OPTOELECTRONICS DISPLAY Co Ltd
Priority date: 2011-01-11
Filing date: 2011-01-11
Publication date: 2011-08-03
Anticipated expiration: 2021-01-11

Abstract

The utility model relates to an intelligent liquid crystal display module detecting system. An FPGA (field programmable gate array) controller is connected with an input power interface, an upper computer communication interface, an SD (secure digital) memory card, a liquid crystal display module interface and a touch screen interface respectively. The liquid crystal display module interface and the touch screen interface are capable of driving liquid crystal display modules with different interfaces and various touch screens, the FGPA controller can be in communication with the upper computer in real time to send a series of initialized setting instructions to the liquid crystal display modules to be detected so that detecting images are displayed at real time, and can read driving modes, the initialize setting instructions and detecting images of the module from the SD memory card and display the information sequentially so that off-line detection is realized. The intelligent liquid crystal display module detecting system has the advantages that the detecting system is fast in response speed, supports various interface types, is capable of realizing communication with the upper computer, and has a double-protection function, output can be shut off quickly when output current exceeds a specified value, so that modules to be detected can be protected against being broken through and the detecting system cannot be burnt out by strong current.

Description

Intelligence liquid crystal display module detection system

Technical field

The utility model relates to a kind of intelligent liquid crystal display module detection system, supports multiple interfaces types such as I2C, SPI, 8080 SYSTEM, 6800SYSTEM, RGB, for the detection of various liquid crystal display modules provides comprehensive hardware supported; Can be applicable to the manufacturing enterprise of liquid crystal display module and use enterprise, as the conventional equipment that detects various liquid crystal display mode set products.

Background technology

The liquid crystal display module is widely used in numerous areas such as industry, national defence, household electrical appliances, traffic as present main display device.The productive capacity of liquid crystal display module improves year by year at present, adopt artificial semi-automatic detection and detect always, this detection system travelling speed is slow, function singleness, detect dissimilar liquid crystal display modules and need design different special circuits, therefore, artificial semi-automatic detection means of the prior art has become the bottleneck problem that production efficiency improves and product quality promotes.

Summary of the invention

The purpose of this utility model provide a kind of response speed fast, support the multiple interfaces type, and can realize the intelligent liquid crystal display module detection system of upper machine communication.

For achieving the above object, the utility model is achieved through the following technical solutions:

Intelligence liquid crystal display module detection system comprises FPGA controller, input power interface, liquid crystal display mode group interface, touch screen interface.The FPGA controller is connected with input power interface, liquid crystal display mode group interface and touch screen interface respectively;

Described FPGA controller is the core devices of native system, and under its control, the interface by appointment sends a series of initialization to tested module instruction is set, and shows in real time and detects picture;

Described input power interface provides the liquid crystal display module required various power supplys;

Described liquid crystal display mode group interface can drive the liquid crystal display module of various interface type;

Described touch screen interface can drive all kinds of touch-screens, to realize the function of senses touch screen.

Described intelligent liquid crystal display module detection system is provided with communication interface with pc, comprises USB interface and RS232 interface two parts, real-time and upper machine communication.

Described intelligent liquid crystal display module detection system is provided with the SD storage card, is used for storing the activation bit of liquid crystal display module and the resolution chart that will show; Type of drive, the initialization that the FPGA controller can read the liquid crystal display module in the SD storage card is provided with instruction and detects picture and show successively, realizes that off line detects.

Described FPGA controller not only can drive the interface and the touch-screen of now various known liquid crystal display modules, can also realize driving to new interface by software upgrading.

Compared with prior art, the beneficial effects of the utility model are:

1) at first be that the various communication interfaces of now known liquid crystal display module, various type of drive etc. are integrated in the test macro.Can directly drive any known liquid crystal display module by native system.Need the outside video data that constantly transmits in real time to module for the module that does not have controller and storer, could normal display interface.(for example the TFT module of rgb interface and most of 320x240 dot matrix or bigger monochrome screen).At such screen, but native system direct modeling controller is controlled tested module, exports test pattern, reaches the purpose of detection.For the TFT module of rgb interface, way relatively more commonly used is exactly to cooperate its demonstration of control with WINDOWS CE or LINUX operating system with high-end MCU such as ARM in the industry at present, and native system can directly be controlled the TFT screen of this class interface, realizes the detection picture of wanting.

2) secondly be the intelligent characteristic and the numerical characteristic aspect of this detection system: this detection system has communication interface with pc, can pass through host computer procedure rapid adjustment driving parameters and modification detection picture anywhere or anytime; When offline operation, the detection picture that also can show is stored in the SD card by the testing process requirement, and the demonstration that replaces, circulates detects to realize off line.

3) be that this detection system uses fpga chip to make controller at last, realization be hard logic.Utility Engineers's hardware description language (Verilog/VHDL) is described the logic that needs realization, generates file destination by the comprehensive back of special instrument then.After file destination downloaded into FPGA, FPGA inside has just formed the hardware circuit of realizing predetermined function, these circuit are to be made of basic gate circuit and trigger, thereby characteristics such as determined this controller response speed fast (ns level, be issued to be provided with finish and in several ms, to realize from a series of instructions), can not decipher.

4) native system has double protection functions, if load power consumption is too high, native system can also turn-off output in several ms.So not only energy-conservation, tested module and detection system self are not punctured by heavy current to have gone back safe protection.

Description of drawings

Fig. 1 is the structured flowchart of intelligent liquid crystal display module detection system;

Fig. 2 is the structured flowchart that intelligent digital is adjusted power supply;

Fig. 3 is the isolation adjusting module structured flowchart that intelligent digital is adjusted power supply.

Embodiment

See Fig. 1, intelligent liquid crystal display module detection system comprises FPGA controller, input power interface, communication interface with pc, SD storage card, liquid crystal display mode group interface, touch screen interface.The FPGA controller is connected with input power interface, communication interface with pc, SD storage card, liquid crystal display mode group interface, touch screen interface respectively.

The input power interface provides the liquid crystal display module required various power supplys;

The liquid crystal display mode group interface can drive the liquid crystal display module of various present known interface types;

Touch screen interface can drive all kinds of touch-screens, to realize the function of senses touch screen;

The activation bit of SD storage card storage liquid crystal display module and the resolution chart that will show.

The FPGA controller is the core of native system, is realized by fpga chip.Its major function comprises:

1) is provided with communication interface between controller and the host computer, comprises USB interface and RS232 interface two parts.Can be directly and upper machine communication, and under its control, work;

2) interface by appointment sends a series of initialization to tested liquid crystal display module instruction is set, and shows in real time to detect picture;

3) type of drive, the initialization of reading module in the SD storage card is provided with instruction and detects picture and show successively, realizes that off line detects.

The FPGA controller can drive the interface and the touch-screen of now various known liquid crystal display modules, and can realize driving to new interface by upgrading.The interface type of supporting comprises at present: SYSTEM 6800,8080,3 line SPI, 4 line SPI, I2C also have the rgb interface of TFT screen and do not have the real-time refresh interface of the LCD screen of controller.

Native system has double protection functions, when output current overshoot value, can turn-off output rapidly.Not only can protect tested module not breakdown, can also protect this detection system not burnt out by heavy current.

The utility model intelligence liquid crystal display module detection system can adopt common power, also can adopt intelligent digital to adjust power supply, and intelligent digital is adjusted the multichannel output that power supply can be realized supply voltage, and range of adjustment is wide, the precision height, and response speed is fast.Therefore can make the utility model detection system have the accuracy of detection height, characteristics such as adaptability is stronger.

As Fig. 2, shown in Figure 3, intelligent digital is adjusted power supply and is comprised the multichannel transformer, isolates adjusting module, sample of signal module, A/D converter, FPGA1 controller; Described multichannel transformer provides the multichannel output voltage signal, gives the isolation adjusting module; Isolate adjusting module and comprise rectification filtering module, metal-oxide-semiconductor, secondary inductance capacitor filtering module, optocoupler isolator, rectification filtering module, metal-oxide-semiconductor, secondary inductance capacitor filtering module are connected successively; By the dutycycle of FPGA1 controller control metal-oxide-semiconductor conducting, thus the adjustment of realization output voltage size; After the sample of signal module is sampled to each road output signal of isolating adjusting module, through after amplification and the A/D conversion signal being passed to the FPGA1 controller; The switching signal of the exportable different frequency of FPGA1 controller is controlled the turn-on frequency of metal-oxide-semiconductor, thereby controls the output voltage signal size on each road.

Described FPGA1 controller connects the liquid crystal display module, and magnitude of voltage and current value that detected each road is exported export the demonstration of liquid crystal display module to; Described FPGA1 controller connects communication module, by communication module and upper machine communication.

The detection step of this intelligent liquid crystal display module detection system is as follows:

1), adjusts the output voltage values of each required road power supply earlier, for lighting the hardware condition that liquid crystal display module to be checked is ready to the power supply aspect according to liquid crystal display module to be checked requirement;

2) default of delay time, detection picture to be shown etc. between the interface type of setting tested module on the host computer, every initiation parameter, instruction then;

3) after setting is finished code is sent on the FPGA controller, the FPGA controller is provided with, transmits operations such as display graphics to tested liquid crystal display module successively according to the requirement that is provided with, and controls its displaying contents;

4) if want off line to use this detection system, after just all parameter settings can being finished, deliver to the FPGA controller; The graphics memory that will show by the USB mouth is to the SD storage card simultaneously, and then the SD storage card is inserted detection system.This sample detection system just can begin execution according to the program of setting and detect.

Claims

1. intelligent liquid crystal display module detection system is characterized in that, comprises FPGA controller, input power interface, liquid crystal display mode group interface, touch screen interface; The FPGA controller is connected with input power interface, liquid crystal display mode group interface and touch screen interface respectively; The interface of described FPGA controller by appointment sends a series of initialization to tested module instruction is set, and shows in real time to detect picture.

2. intelligent liquid crystal display module detection system according to claim 1 is characterized in that, is provided with communication interface with pc, comprises USB interface and RS232 interface two parts, real-time and upper machine communication.

3. intelligent liquid crystal display module detection system according to claim 1 and 2 is characterized in that, is provided with the SD storage card and is connected with the FPGA controller.

4. intelligent liquid crystal display module detection system according to claim 1 and 2 is characterized in that, described input power interface is adjusted power supply with intelligent digital and is connected; Intelligent digital is adjusted power supply and is comprised the multichannel transformer, isolates adjusting module, sample of signal module, A/D converter, FPGA1 controller; Described multichannel transformer provides the multichannel output voltage signal, gives the isolation adjusting module; Isolate adjusting module and comprise rectification filtering module, metal-oxide-semiconductor, secondary inductance capacitor filtering module, optocoupler isolator, rectification filtering module, metal-oxide-semiconductor, secondary inductance capacitor filtering module are connected successively; After the sample of signal module is sampled to each road output signal of isolating adjusting module, through after amplification and the A/D conversion signal being passed to the FPGA1 controller; The switching signal of the exportable different frequency of FPGA1 controller, the turn-on frequency of control metal-oxide-semiconductor.

5. intelligent liquid crystal display module detection system according to claim 4 is characterized in that, described FPGA1 controller connects the liquid crystal display module, and magnitude of voltage and current value that detected each road is exported export the demonstration of liquid crystal display module to; Described FPGA1 controller connects communication module, by communication module and upper machine communication.