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Liquid crystal device and its regulation

A technology of a liquid crystal display device and an adjustment method, which can be applied to permanent visual display devices, static indicators, cathode ray tube indicators, etc., can solve the problems of increased manufacturing processes and increased burdens in assembly plants.

Inactive Publication Date: 2004-02-04
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As mentioned above, since the counter electrode signal Vcom of the liquid crystal panel must be detected and set at the optimum value by the assembly factory, the manufacturing process on the assembly factory side will increase, resulting in an increased burden

Method used

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  • Liquid crystal device and its regulation
  • Liquid crystal device and its regulation
  • Liquid crystal device and its regulation

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Embodiment Construction

[0025] A first embodiment of the present invention will be described with reference to the drawings. figure 1 It is a block diagram of the liquid crystal module. This liquid crystal module 200 is composed of a liquid crystal panel 210 and a control IC 220 that supplies a video signal Sig, a counter electrode signal Vcom, and other various drive signals to the liquid crystal panel 210 and controls display of the liquid crystal panel 210 .

[0026] Here, the liquid crystal panel 210 is, for example, Figure 8 The pixels are arranged in a matrix of m rows and n columns to form a pixel area, and then a horizontal scanning device, a vertical scanning device, etc. not shown are arranged around the pixel area. In addition, this control IC 220 has: a permanent memory 221 that memorizes the n-bit ID code corresponding to the optimum value of the counter electrode signal Vcom; DA converter 222 (counter electrode signal generating circuit) for counter electrode signal Vcom.

[0027] ...

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Abstract

A liquid crystal display device has a liquid crystal panel (210), a DA converter (222) for g

Description

technical field [0001] The present invention relates to a liquid crystal display device and a method for adjusting the liquid crystal display device, which allow a user of a liquid crystal panel to easily set an optimum value of a counter electrode signal Vcom. Background technique [0002] In recent years, liquid crystal panels have been widely used in electrical appliances such as televisions and mobile phones. Figure 8 It is an equivalent circuit diagram showing one pixel of a conventional liquid crystal panel. In fact, the pixels are arranged in a matrix of m rows and n columns. A gate signal line 50 and a drain signal line 51 are intersected on an insulating substrate (not shown), and a pixel selection thin film transistor 52 connected to both signal lines 50 and 51 is provided near the intersection. Hereinafter, the thin film transistor is simply referred to as TFT. The source 52 s of the pixel selection TFT 52 is connected to the display electrode 54 of the liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/00G09G3/20G09G3/36G09G5/00
CPCG09G2370/042G09G5/003G09G2300/08G09G3/3655G09G2320/0693G09G2320/0223G09G3/006Y10S345/904G09G3/36
Inventor 筒井雄介北川诚小林贡
Owner SANYO ELECTRIC CO LTD