CN102540521A - System and method for testing transmittance of liquid crystal display (LCD) panel - Google Patents
System and method for testing transmittance of liquid crystal display (LCD) panel Download PDFInfo
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- CN102540521A CN102540521A CN2012100588847A CN201210058884A CN102540521A CN 102540521 A CN102540521 A CN 102540521A CN 2012100588847 A CN2012100588847 A CN 2012100588847A CN 201210058884 A CN201210058884 A CN 201210058884A CN 102540521 A CN102540521 A CN 102540521A
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Abstract
The invention discloses a system for testing transmittance of a liquid crystal display (LCD) panel. The testing system comprises a digital signal generating system, a processing and receiving system, a power supply, a display device, a panel driving circuit and a backlight driving circuit; the backlight driving circuit drives the signal generating system to generate optical signals; the signal processing and receiving system is used for converting and processing the optical signals and inputting the signals to the display device; the display device is used for responding to the testing signals generated by the digital signal generating system; the power supply is used for providing a driving voltage for the whole testing system; the signal generating system comprises a light emitting diode and an optical filter; and the signal processing system comprises a photoelectric diode, an amplifier, a digital-analog converter and a data processor. According to the technical scheme, the system is low in cost and convenient to use and maintain, and meets the testing requirements of research and development, verification and production lines.
Description
Technical field
The present invention is specifically related to a kind of test macro of LCD panel transmitance, and the method for testing of this LCD panel transmitance.
Background technology
At present; The method of testing of LCD panel has two kinds: a kind of method is to detect through the pick-up unit that has detecting head; Utilization has the pick-up unit of a plurality of detecting heads; Be coupled to the LCD panel by detecting head, do not meet preassigned and be when detecting head detects feedback signal from the LCD panel, and then by optical system for example electron microscope distinguish; Another kind is to analyze through the picture coding of gathering.Yet these two kinds of method complex design, the equipment existence costs an arm and a leg, and maintaining is complicated, is unfavorable for shortcomings such as workshop streamline use simultaneously.And some is used as the eyeglass LCD of active 3D eyes tests have more than is needed so high response speed and precision, so adopt this kind equipment to research and develop checking, particularly the production test meeting causes the serious waste of resource.
Summary of the invention
Technical matters to be solved by this invention is: a kind of test macro of LCD panel is provided, and in the electronic component less demanding to measuring accuracies such as 3D glasses, that avoids existing in the conventional art costs an arm and a leg the defective that production cost is higher; Simultaneously, a kind of method of testing of this LCD panel is provided, can satisfies research and development checking and production test demand, and with low cost, use, easy to maintenance.
For solving the problems of the technologies described above, technical scheme provided by the present invention is: a kind of LCD panel transmission measurement system, comprise the digital signal generation systems, and handle and accept system, power supply, display device, panel drive circuit and backlight drive circuit; Said backlight drive circuit drive signal generation systems produces light signal; Said signal Processing is accepted system light signal conversion, processing is inputed to display device; Said display device responds the test of said digital signal generation systems generation and uses signal, and described power supply is that whole test system provides driving voltage; Said signal generating system comprises light emitting diode, optical filter; Described signal processing system comprises the photodiode that is used for the conversion of light-electricity, and amplifier, digital to analog converter and data processor that said electric signal is handled.
Design further is, the light emitting diode of LCD panel transmission measurement disclosed by the invention system comes driven for emitting lights by the light-emitting diode tube drive circuit.
Design further is, the LED backlight driving circuit in the LCD panel transmission measurement disclosed by the invention system is by data processor controlled.
Design further is, the LCD panel in the LCD panel transmission measurement disclosed by the invention system has the work of LCD driving circuit drives.
Design further is, the LCD panel drive circuit is by data processor controlled in the LCD panel transmission measurement disclosed by the invention system.
The present invention simultaneously also provides a kind of method of testing of LCD panel transmitance, and may further comprise the steps: may further comprise the steps: the first step: energized opens driving circuit; Second step: the generation of test signal; It is characterized in that: described step B may further comprise the steps completion: test is sent by light emitting diode with light; The process optical filter is with pointolite light furnishing directional light; Parallel rays projects on the high-speed photodiode through LCD, by photodiode light signal is transformed into electric signal.The 3rd step: the acceptance of digital signal and processing; It is characterized in that: described step C may further comprise the steps completion: the amplification of electric signal process wideband amplification circuit is delivered to analog to digital converter and is converted digital signal to; Processor is handled digital signal, calculates parameters such as transmitance, contrast and response time.The 4th step: digital signal shows through liquid crystal indicator.
Owing to adopted the invention described above technical scheme, the method for testing of the test macro of LCD panel and LCD panel can satisfy powerfully, can satisfy to research and develop and verify and the production test demand, and with low cost, use, easy to maintenance.
Description of drawings
It shown in the accompanying drawing 1 circuit diagram of LCD panel transmission measurement of the present invention system.
It shown in the accompanying drawing 2 circuit diagram of LCD panel transmission measurement of the present invention system.
It shown in the accompanying drawing 3 process flow diagram of LCD panel transmission measurement method signal generating system part of the present invention.
It shown in the accompanying drawing 4 process flow diagram of LCD panel transmission measurement method signal processing system part of the present invention.
Wherein, light emitting diode is 110, and optical filter is 109, and high-speed photodiode is 101; Wideband amplification circuit is 102, and analog to digital converter is 103, and processor is 104, and display device is 105; The light-emitting diode tube drive circuit is 107, and the LCD driving circuit is 106, and power supply is 111; The LCD panel is 108, signal generating system 201, signal processing system 301.
Embodiment
Below described most preferred embodiment only be that the present invention sets forth embodiment of the present invention, but be not limited to disclosed any practical implementation form.
As illustrating 1 with shown in the diagram 2, a kind of transmittance test macro of LCD panel comprises signal generating system 201, power supply 111, signal processing system 301, display device 105 and LCD driving circuit 106 and light-emitting diode tube drive circuit 107; Said driving circuit drives signal generating system produces light signal; Said signal processing system inputs to display device 105 to light signal conversion, processing; Signal is used in the test that the said digital signal generation systems of said display device 105 responses produces, and described power supply 111 provides driving voltage for whole test system; Wherein said signal generating system comprises light emitting diode 110, optical filter 109; Described signal processing system comprises photodiode 101, amplifier 102, digital to analog converter 103 and data processor 104.The present invention adopts the high-speed silicon PIN photodiode to carry out light signal collection, amplifies through broadband operational amplifier, by high-speed ADC signal is converted into digital quantity, finally in MCU, calculates transmitance, contrast and response time.The power supply of total system has system's power supply 111 to provide.The test macro of LCD panel transmitance provided by the invention is a kind of general test macro, and it is low to have a testing cost, characteristics such as testing efficiency height.
The testing scheme of LCD panel transmitance in the embodiment of the invention, optimized technical scheme is: as illustrate shown in 3, in steps A, test is sent by light emitting diode 110 with light, and process optical filter 109 is with pointolite light furnishing directional light.In the test process, light emitting diode 110 is by light-emitting diode tube drive circuit 107 driven for emitting lights, and LCD108 is by the 106 driving work of LCD driving circuit.Light-emitting diode tube drive circuit 107 is by processor 104 controls.
As illustrate shown in 4; In step B, the parallel rays that is sent by signal generation system projects on the high-speed photodiode 101 through LCD, by photodiode 101 light signal is transformed into electric signal; 102 amplifications of electric signal process wideband amplification circuit are delivered to analog to digital converter 103 and are converted digital signal to; 104 pairs of digital signals of processor are handled, and calculate parameters such as transmitance, contrast and response time, show through display 105.Light-emitting diode tube drive circuit and LCD driving circuit are by processor 104 controls.
Most preferred embodiment described above only is that the present invention is set forth and explains; But be not limited to disclosed any concrete form; Possible when carrying out many modifications and variation, and all modifications and variation all should belong to the scope of accompanying claims protection of the present invention.
Claims (7)
1. the test macro of a LCD panel transmitance comprises the digital signal generation systems, handles and accepts system, power supply, display device, LCD panel drive circuit and backlight drive circuit; Said backlight drive circuit drive signal generation systems produces light signal; Said signal Processing is accepted system light signal conversion, processing is inputed to display device; Said display device responds the test of said digital signal generation systems generation and uses signal, and described power supply is that whole test system provides driving voltage; It is characterized in that: said signal generating system comprises light emitting diode, optical filter; Described signal processing system comprises the photodiode that is used for the conversion of light-electricity, and amplifier, digital to analog converter and data processor that said electric signal is handled.
2. the test macro of LCD panel transmitance according to claim 1 is characterized in that: it is that test macro provides used light that said test macro is provided with light emitting diode.
3. the test macro of LCD panel transmitance according to claim 2 is characterized in that: said light emitting diode comes driven for emitting lights by the light-emitting diode tube drive circuit.
4. the test macro of LCD panel transmitance according to claim 3 is characterized in that: said backlight drive circuit is by data processor controlled.
5. the test macro of LCD panel transmitance according to claim 1 is characterized in that: described LCD panel has the work of LCD driving circuit drives.
6. the test macro of LCD panel transmitance according to claim 1 is characterized in that: said panel drive circuit is by data processor controlled.
7. the method for testing of a LCD panel transmitance may further comprise the steps:
A, energized open driving circuit;
The generation of B, test signal; It is characterized in that: described step B may further comprise the steps completion: test is sent by light emitting diode with light; The process optical filter is with pointolite light furnishing directional light; Parallel rays projects on the high-speed photodiode through LCD, by photodiode light signal is transformed into electric signal;
The acceptance of C, digital signal and processing; It is characterized in that: described step C may further comprise the steps completion: the amplification of electric signal process wideband amplification circuit is delivered to analog to digital converter and is converted digital signal to; Processor is handled digital signal, calculates parameters such as transmitance, contrast and response time;
D, digital signal show through liquid crystal indicator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100588847A CN102540521A (en) | 2012-03-08 | 2012-03-08 | System and method for testing transmittance of liquid crystal display (LCD) panel |
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| CN2012100588847A CN102540521A (en) | 2012-03-08 | 2012-03-08 | System and method for testing transmittance of liquid crystal display (LCD) panel |
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| CN102540521A true CN102540521A (en) | 2012-07-04 |
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| CN2012100588847A Pending CN102540521A (en) | 2012-03-08 | 2012-03-08 | System and method for testing transmittance of liquid crystal display (LCD) panel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645764A (en) * | 2012-04-20 | 2012-08-22 | 歌尔声学股份有限公司 | Liquid crystal display (LCD) transmissivity testing method and device |
| CN102967443A (en) * | 2012-10-26 | 2013-03-13 | 京东方科技集团股份有限公司 | Transparent display device testing method and device |
| CN103900795A (en) * | 2014-02-20 | 2014-07-02 | 京东方科技集团股份有限公司 | Device and method for testing transparent effect of transparent display screen |
| CN106531038A (en) * | 2016-12-09 | 2017-03-22 | 武汉华星光电技术有限公司 | Display device and detection method of display panel |
| CN107014591A (en) * | 2017-03-29 | 2017-08-04 | 广东美的制冷设备有限公司 | The printing opacity method of testing and device of air-conditioning panel |
| CN109752871A (en) * | 2019-03-21 | 2019-05-14 | 京东方科技集团股份有限公司 | A kind of device and method for testing display panel transmitance |
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| TWM311880U (en) * | 2006-12-06 | 2007-05-11 | Chang Yu Technology Co Ltd | Optics testing module |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645764A (en) * | 2012-04-20 | 2012-08-22 | 歌尔声学股份有限公司 | Liquid crystal display (LCD) transmissivity testing method and device |
| CN102645764B (en) * | 2012-04-20 | 2015-03-25 | 歌尔声学股份有限公司 | Liquid crystal display (LCD) transmissivity testing method and device |
| CN102967443A (en) * | 2012-10-26 | 2013-03-13 | 京东方科技集团股份有限公司 | Transparent display device testing method and device |
| US9530337B2 (en) | 2012-10-26 | 2016-12-27 | Boe Technology Group Co., Ltd. | Test method and test apparatus for transparent display device |
| CN103900795A (en) * | 2014-02-20 | 2014-07-02 | 京东方科技集团股份有限公司 | Device and method for testing transparent effect of transparent display screen |
| CN106531038A (en) * | 2016-12-09 | 2017-03-22 | 武汉华星光电技术有限公司 | Display device and detection method of display panel |
| CN106531038B (en) * | 2016-12-09 | 2019-04-30 | 武汉华星光电技术有限公司 | The detection method of display device and display panel |
| CN107014591A (en) * | 2017-03-29 | 2017-08-04 | 广东美的制冷设备有限公司 | The printing opacity method of testing and device of air-conditioning panel |
| CN109752871A (en) * | 2019-03-21 | 2019-05-14 | 京东方科技集团股份有限公司 | A kind of device and method for testing display panel transmitance |
| CN109752871B (en) * | 2019-03-21 | 2021-11-23 | 京东方科技集团股份有限公司 | Equipment and method for testing transmittance of display panel |
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Application publication date: 20120704 |