CN102141695B - Detection system for intelligent liquid crystal display module - Google Patents
Detection system for intelligent liquid crystal display module Download PDFInfo
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- CN102141695B CN102141695B CN2011100054474A CN201110005447A CN102141695B CN 102141695 B CN102141695 B CN 102141695B CN 2011100054474 A CN2011100054474 A CN 2011100054474A CN 201110005447 A CN201110005447 A CN 201110005447A CN 102141695 B CN102141695 B CN 102141695B
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Abstract
The invention relates to a detection system for an intelligent liquid crystal display module. An FPGA (Field Programmable Gata Array) controller is respectively connected with an input power supply interface, an upper computer communication interface, an SD (Secure Digital) memory card, a liquid crystal display module interface and a touch screen interface. The liquid crystal display module interface and the touch screen interface can be used for driving liquid crystal display modules with various interface types and various touch screens; the FPGA controller can be in communication with an upper computer on a real-time basis and is used for sending a series of initial set instructions to the detected liquid crystal display module, and the detected liquid crystal display module displays a detection picture on the real-time basis; and the FPGA controller can also read and sequentially display the driving manner, the initial set instructions and the detection picture of the module from the SD memory card so as to realize the offline detection. The detection system has the advantages that the response speed is quick, the various interface types are supported, and the communication with the upper computer can be realized; and the detection system fulfills double protection functions, can quickly switch off the output when the output current exceeds the specified value, can protect the detected module from breakdown and can be also prevented from burning out by a strong current.
Description
Technical field
The present invention relates to a kind of intelligent liquid crystal display module detection system, support multiple interfaces types such as I2C, SPI, 8080SYSTEM, 6800SYSTEM, RGB, for the detection of various liquid crystal display modules provides comprehensive hardware supports; Can be applicable to the manufacturing enterprise and application enterprise of liquid crystal display module, 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, and function singleness detects dissimilar liquid crystal display modules and need design different special circuits; Therefore, the semi-automatic detection means of manual work 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 invention is to 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 realizing above-mentioned purpose, the present invention realizes through following technical scheme:
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 in its control down, the interface through appointment sends a series of initialization to tested module instruction is set, and shows the detection picture in real time;
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 be through the driving of software upgrading realization to new interface.
Compared with prior art, the invention has the beneficial effects as follows:
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 through 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).To 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 through the comprehensive back of special instrument then.After downloading into FPGA to file destination; FPGA inside has just formed the hardware circuit of realizing predetermined function; These circuit are to be made up of basic gate circuit and trigger; Thereby characteristics such as determined this controller response speed fast (ns level, be issued to completion is set in several ms, realizes 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, seized 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 of intelligent digital adjustment power supply;
Fig. 3 is the isolation adjusting module structured flowchart of intelligent digital adjustment 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 and the resolution chart that will show of SD storage card storage liquid crystal display module.
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 work down in its control;
2) interface through appointment sends a series of initialization to tested liquid crystal display module instruction is set, and shows in real time to detect picture;
Type of drive, the initialization of 3) 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 the driving to new interface through upgrading.The interface type of supporting at present comprises: 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 seized module not breakdown, can also protect this detection system not burnt out by heavy current.
The present invention's intelligence liquid crystal display module detection system can adopt common power, also can adopt intelligent digital adjustment power supply, and intelligent digital adjustment power supply can be realized the multichannel output of supply voltage, and range of adjustment is wide, and precision is high, and response speed is fast.Therefore can make detection system of the present invention have the accuracy of detection height, characteristics such as adaptability is stronger.
Like Fig. 2, shown in Figure 3, intelligent digital adjustment power supply comprises the multichannel transformer, isolates adjusting module, sample of signal module, A/D converter; 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 FPGA controller control metal-oxide-semiconductor conducting, thereby realize the adjustment that output voltage is big or small; 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 FPGA controller; The switching signal of the exportable different frequency of FPGA controller, the turn-on frequency of control metal-oxide-semiconductor, thus the output voltage signal of controlling each road is big or small.
Described FPGA 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 FPGA controller connects communication module, through communication module and upper machine communication.
The detection step of this intelligent liquid crystal display module detection system is following:
1) according to liquid crystal display module to be checked requirement, the output voltage values of each road power supply that adjustment earlier is required is for lighting the hardware condition that liquid crystal display module to be checked is ready to the power supply aspect;
2) preset of delay time, detection picture to be shown etc. between the interface type of setting seized module on the host computer, each item initiation parameter, instruction then;
3) code is sent on the FPGA controller after completion is set, the FPGA controller is provided with, transmits operations such as display graphics to seized liquid crystal display module successively according to the requirement that is provided with, and controls its displaying contents;
4) if want this detection system of off line use, just can all parameters be provided with completion after, deliver to the FPGA controller; The graphics memory that will show through the USB mouth simultaneously and then inserts detection system with the SD storage card to the SD storage card.This sample detection system just can begin execution according to the program of setting and detect.
Claims (5)
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, intelligent digital adjustment power supply; 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 in its control down, the interface through appointment sends a series of initialization to tested module instruction is set, and shows the detection picture in real time;
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 input power interface is connected with intelligent digital adjustment power supply; Intelligent digital adjustment power supply comprises the multichannel transformer, isolates adjusting module, sample of signal module, A/D converter; 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 FPGA controller control metal-oxide-semiconductor conducting, thereby realize the adjustment that output voltage is big or small; 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 FPGA controller; The switching signal of the exportable different frequency of FPGA controller, the turn-on frequency of control metal-oxide-semiconductor, thus the output voltage signal of controlling each road is big or small.
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, 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.
4. intelligent liquid crystal display module detection system according to claim 1 and 2; It is characterized in that; Described FPGA controller not only can drive the interface and the touch-screen of now various known liquid crystal display modules, can also be through the driving of software upgrading realization to new interface.
5. intelligent liquid crystal display module detection system according to claim 1 is characterized in that, described FPGA 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 FPGA controller connects communication module, through communication module and upper machine communication.
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| CN102654964B (en) * | 2012-05-08 | 2016-04-06 | 深圳同兴达科技股份有限公司 | The programmable gate array test plate of liquid crystal display and programmable gate array test system |
| CN103389845B (en) * | 2013-07-04 | 2016-09-07 | 深圳市泛思成科技有限公司 | A kind of capacitance touch screen burn test system |
| CN103616776B (en) * | 2013-11-26 | 2016-01-13 | 亚世光电股份有限公司 | The apparatus and method of a kind of machine automatic gauging liquid crystal module and assembling one |
| CN104714914B (en) * | 2015-04-02 | 2017-07-21 | 武汉精测电子技术股份有限公司 | MIPI liquid crystal module initiated configuration methods |
| CN108510921A (en) * | 2017-12-29 | 2018-09-07 | 学校法人金泉大学 | LCD module detecting system |
| CN108387589A (en) * | 2018-02-22 | 2018-08-10 | 张海明 | A kind of LCD/LCM defects efficient detection system and method |
| CN108958816B (en) * | 2018-06-21 | 2021-12-14 | Oppo（重庆）智能科技有限公司 | Initialization method, device and electronic device |
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| US6999051B2 (en) * | 2003-06-11 | 2006-02-14 | Toppoly Optoelectronics Corp. | Light-on aging test system for flat panel display |
| GB2412235B (en) * | 2004-03-19 | 2008-03-26 | Seiko Epson Corp | An optoelectronic device |
| CN1770248A (en) * | 2004-11-03 | 2006-05-10 | 上海华园微电子技术有限公司 | Display drive circuit for liquid crystal on silicon based on large-scale integrated circuit |
| CN100583214C (en) * | 2006-12-31 | 2010-01-20 | 深圳Tcl工业研究院有限公司 | LCD television set backlight control system and method |
| KR101361516B1 (en) * | 2007-11-21 | 2014-02-11 | 삼성전자주식회사 | Display apparatus and control method thereof |
| CN101806656B (en) * | 2010-03-08 | 2011-09-07 | 东南大学 | Luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen |
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Owner name: YASHI OPTOELECTRONICS CO., LTD. Free format text: FORMER OWNER: ANSHAN YES OPTOELECTRONICS DISPLAY CO., LTD. Effective date: 20120830 |
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Effective date of registration: 20120830 Address after: 114031 No. 196 Qianshan Middle Road, Liaoning, Anshan Applicant after: ANSHAN YES OPTOELECTRONICS DISPLAY Co.,Ltd. Address before: 114031, No. 215, Qianshan Road, hi tech Zone, Liaoning, Anshan Applicant before: ANSHAN YES OPTOELECTRONICS DISPLAY Co.,Ltd. |
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Address after: 114031 no.196 Qianshan Middle Road, Anshan City, Liaoning Province Patentee after: Yashi Optoelectronics (Group) Co.,Ltd. Address before: 114031 no.196 Qianshan Middle Road, Anshan City, Liaoning Province Patentee before: ANSHAN YES OPTOELECTRONICS DISPLAY Co.,Ltd. |