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LCD having reduced carton residual image and having background light

A technology of a liquid crystal display device and a liquid crystal layer, which is applied to static indicators, instruments, etc., can solve problems such as unsightly animation and reduced display quality.

Inactive Publication Date: 2004-05-12
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such an afterimage of animation occurs, fast-moving animations will become very ugly, resulting in a problem of reduced display quality.

Method used

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  • LCD having reduced carton residual image and having background light
  • LCD having reduced carton residual image and having background light
  • LCD having reduced carton residual image and having background light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] figure 1 It is a block diagram showing a schematic configuration of the liquid crystal display device of this embodiment. The liquid crystal display device of this embodiment is a transmissive liquid crystal display device with backlight.

[0024] The liquid crystal display device of this embodiment, such as figure 1 As shown, there are A / D converter 1, frame memory 2, data parallel conversion circuit 3, pulse cycle conversion circuit 4, synchronous separation circuit 5, LCD controller 6, gate driver G, 6 data drivers D1~D6, Display panel 7, backlight control circuit 8, backlight 9, etc. A xenon lamp or the like is used as a light source for the background light 9 . In this embodiment, the three constituent elements of the frame memory 2, the data straight-to-parallel conversion circuit 3, and the pulse cycle conversion circuit 4 correspond to the "writing means" ( figure 1 shown by the dotted box).

[0025] display panel, such as Figure 4 As shown, its struct...

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PUM

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Abstract

The present invention provides a liquid crystal display device in which the display quality is improved by providing a back light and reducing animation residual image. The solution of the present invention is provided with a frame memory 2, a data serial- parallel converting circuit 3, and a pulse period converting circuit 4. A signal writing device is also provided to write video signals against a display panel 7 with high speed. Furthermore, a back light controlling circuit 8 is provided to control a back light so that, when the video signals equivalent to a next screen is written with the signal writing means, the back light is turned off during the writing time of the video signals and during the liquid crystal response time, and the back light is turned on till the writing operation starts for the video signals equivalent to the next frame.

Description

technical field [0001] The present invention relates to a liquid crystal display device, in particular to a structure of a liquid crystal display device with background light, which improves the display quality by reducing residual images of moving pictures. Background technique [0002] Generally, the display methods of liquid crystal display devices include what is called a transflective type with backlight, a transmissive type, and what is called a reflective type. For transflective or transmissive liquid crystal display devices with bright display screens, fluorescent lamps are used as light sources for the backlight, and the backlight is usually always on when the liquid crystal display device is in use. [0003] When the display panel of a liquid crystal display device displays a moving image, for example, the previous image remains vaguely without disappearing, and disappears after a certain period of time, resulting in a so-called afterimage phenomenon. If such a mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G09G3/36
Inventor 陈国平上子充雄
Owner ALPS ALPINE CO LTD
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