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Liquid crystal display device

A liquid crystal display and liquid crystal element technology, applied in static indicators, instruments, nonlinear optics, etc., can solve problems such as color shift and fading

Inactive Publication Date: 2011-07-27
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon is called "Shiratchake", ie, "Wash out", "Color Shift", etc., and is regarded as a major defect of liquid crystal display devices using VA mode liquid crystals

Method used

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Examples

Experimental program
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Embodiment Construction

[0040] Embodiments of the present invention are described in detail below by referring to the accompanying drawings.

[0041] figure 1 is a block diagram showing the overall configuration of a liquid crystal display device (liquid crystal display device 1 ) in an embodiment of the present invention. This liquid crystal display device 1 includes a liquid crystal display panel 2, a backlight section 3, an image processing section 41, a multi-pixel conversion section 43, a reference voltage generation section 45, a data driver 51, a gate driver 52, a timing control section 61, and a backlight control section 63 .

[0042] The backlight section 3 is a light source from which light is guided to the liquid crystal display panel 2, and is constituted by including CCFL (cold cathode fluorescent lamp), LED (light emitting diode), and the like.

[0043] In response to a drive signal from a gate driver 52 to be described later, the liquid crystal display panel 2 modulates light from t...

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Abstract

Provided is a liquid crystal display device which uses a liquid crystal of a VA mode and which can improve a display picture quality better than the prior art while improving the field angle characteristics of luminance. At the time of divided drive actions on a sub pixel (20A), in a high luminance region, a liquid crystal applied voltage (D2a) to a liquid crystal element (22A) has a tendency to become lower than that in an intermediate luminance region while becoming a high voltage side at or higher than the input applied voltage for a picture signal (D1). As a result, the azimuthal angle deflection of the liquid crystal occurs less frequently than in the divided drive actions of the prior art. At the time of divided drive actions on a sub pixel (20B), in a low luminance region, on the other hand, a liquid crystal applied voltage (D2b) to a liquid crystal element (22B) has a tendency to become higher than that in the intermediate luminance region while becoming a low voltage side at or lower than the input applied voltage for the picture signal (D1). As a result, at the time of performing an overdrive, a rebounding phenomenon occurs less frequently than in the divided drive actions of the prior art.

Description

technical field [0001] The present invention relates to a liquid crystal display device composed of vertical alignment (VA) mode liquid crystals. Background technique [0002] In recent years, for display monitors of liquid crystal televisions, notebook personal computers, car navigation systems, etc., for example, liquid crystal display devices employing a VA (Vertical Alignment) mode using vertical alignment type liquid crystals have been proposed. In this VA mode, liquid crystal molecules all have negative dielectric anisotropy (negative dielectric anisotropy), that is, the molecules have a dielectric constant in the direction of their long axis that is lower than that in the direction of their short axis. characteristics, thereby realizing a wider viewing angle than the case of using a TN (Twisted Nematic) mode. [0003] The problem here is that such a liquid crystal display device using VA mode liquid crystals causes a problem of changing the luminance between when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/1343G09G3/20G09G3/36
CPCG09G3/3607G09G3/3648G09G2320/0252G09G2300/0447G09G2320/0276G09G2320/028G09G2320/0673G09G2320/068
Inventor 中畑佑治鎌田豪
Owner SONY GRP CORP
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