Liquid crystal display response time electrooptical automatic measuring instrument

A technology of liquid crystal display and response time, which is applied in the field of photoelectric measuring instruments, can solve problems such as complex actual conditions, and achieve the effects of simple test methods, accurate test results, and elimination of measurement errors

Inactive Publication Date: 2005-09-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the nominal response time of various liquid crystal displays i

Method used

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  • Liquid crystal display response time electrooptical automatic measuring instrument
  • Liquid crystal display response time electrooptical automatic measuring instrument
  • Liquid crystal display response time electrooptical automatic measuring instrument

Examples

Experimental program
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Embodiment Construction

[0025] Such as figure 2 As shown, this embodiment is composed of a brightness detector 1, a data acquisition board 2, a computer 3, a signal generator 4 and a liquid crystal display 5.

[0026] Such as image 3 As shown, the brightness detector 1 is used to convert the brightness signal into an electrical signal, and it includes a light cylinder 1-1, a color filter 1-2, a preamplifier circuit 1-3, a light bar 1-4 and a silicon photocell 1- 5. The light bar 1-4 is set at the input end of the light tube 1-1, the color filter 1-2 is set at the output end of the light tube 1-1, and the photoelectric signal is converted by the silicon photocell 1-5, and the converted The electrical signal enters the preamplifier circuit 1-3 to be amplified (see Figure 4 shown), the preamplifier circuit adopts the amplifier OP07, and its output signal is output to the amplifier circuit 2-1 in the data acquisition board 2 through the signal line S (see Figure 5 shown), from IC U 5 (Model OP07)...

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Abstract

The present invention relates to one kind of automatic photoelectronic test instrument for the response time of LCD, and solves the technological problem of providing automatic photoelectronic test instrument for the response time of LCD with simple and accurate test and capable of eliminating circuit noise interference. The utomatic photoelectronic test instrument can measure the whole response time and grey scale response time of LCD, and consists of brightness detector to convert the brightness signal into electric signal; data acquisition board comprising monolithic computer, amplifier circuit, A/D converter circuit, data memory circuit and level converting circuit; computer to power the data acquisition board and to communicate with the data acquisition board via RS232 interface; and signal generator to generate video test signals of different grey scales. The present invention is used in testing LCD.

Description

technical field [0001] The invention relates to a photoelectric measuring instrument, in particular to a photoelectric automatic measuring instrument for response time of a liquid crystal display. Suitable for LCD monitors. Background technique [0002] The imaging principle of the liquid crystal display is to place the liquid crystal between two pieces of conductive glass, driven by the electric field between the two electrodes, causing the electric field effect of twisting the liquid crystal molecules, controlling the transmittance of light, and producing bright and dark images. Since it takes a certain time for the liquid crystal molecules to change from one twisted state to another twisted state, it takes a certain response time to complete the change of the image brightness of the liquid crystal display. The so-called response time reflects the response speed of the liquid crystal display to the input electrical signal. When the input electrical signal changes from bla...

Claims

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Application Information

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IPC IPC(8): G02F1/13
Inventor 姚军吕颖琦
Owner ZHEJIANG UNIV
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