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Liquid crystal display and driving method used for same

一种液晶显示装置、驱动方法的技术，应用在静态指示器、彩色电视的零部件、电视系统的零部件等方向，能够解决降低显示画面、发生余像、降低显示画面图像质量等问题，达到提高图像质量的效果

Active Publication Date: 2005-07-13
HANNSTAR DISPLAY CORPORATION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This luminance inclination becomes more conspicuous when the size of the liquid crystal panel 5 is increased, and there is a problem of lowering the image quality of the display screen.
[0012] In addition, in Figure 7 In the liquid crystal display device, since there is a moving image only in the center of the display image, the backlight corresponding to the still image is turned on in the peripheral portion of the display screen, and when the moving image is displayed in the peripheral portion, There is a problem that afterimages occur and the image quality of the displayed screen decreases

Method used

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  • Liquid crystal display and driving method used for same
  • Liquid crystal display and driving method used for same
  • Liquid crystal display and driving method used for same

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Embodiment Construction

[0030] figure 1 It is a block diagram showing an electrical configuration of a liquid crystal display device according to an embodiment of the present invention.

[0031] As shown in the figure, the liquid crystal display device of this example is composed of a moving image detection circuit 21, a driving voltage control unit 22, a LUT (Look Up Table, look-up table) 23, a data electrode driving circuit 24, a scanning electrode driving circuit 25, and a liquid crystal panel. 26. Timing duty control unit 27, B / L (backlight) block [1] drive circuit 28, B / L block [2] drive circuit 29, B / L block [3] drive circuit 30 , B / L block [4] drive circuit 31, backlight 32, 33, 34, 35 constitutes. The backlights 32 , 33 , 34 , and 35 are configured to be distributed in the scanning direction of the liquid crystal panel 26 .

[0032] The moving image detection circuit 21 is composed of a memory 21a and a moving image detection comparator 21b. The memory 21 a is constituted by, for example,...

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Abstract

The present invention provides a liquid crystal display device that improves the image quality of a display screen in which moving images and still images are mixed. It sets the backlights (32, 33, 34, 35) distributed in the scanning direction of the liquid crystal panel (26), and distributes one frame of the image input signal VD to the corresponding backlights (32, 33, 34, 35). A plurality of frame blocks ([1], [2], [3], [4]) of the length in the scanning direction, using the moving image detection circuit 21 to determine each frame block ([1], [2], [ 3], [4]) are moving images / still images, and the lighting timing operation control unit (27) makes and is determined corresponding to the response characteristics corresponding to the application of the pixel data (Dj) of each liquid crystal element (42i, j). The backlight corresponding to the frame block of the moving image is turned on and off, and the backlight corresponding to the frame block judged to be a still image is always turned on. Therefore, afterimage phenomenon or edge blurring on moving images becomes less, and flickering does not occur on still images.

Description

technical field [0001] The present invention relates to a liquid crystal display device and a driving method used in the liquid crystal display device, in particular, a liquid crystal display device suitable for displaying mixed images of moving images and still images and a driving method used in the liquid crystal display device method. Background technique [0002] In image display, in particular, liquid crystal display devices have been developed in size and high definition in recent years. In addition, they are not only used in devices that display still images such as personal computers and word processors, but also in Devices for displaying moving images such as televisions (TVs) have begun to be used. Compared with TVs equipped with CRT (cathod Ray Tube), liquid crystal display devices are thinner and occupy a smaller area. It is expected that the penetration rate in ordinary households will be high in the future. [0003] In a liquid crystal display device, since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/1335G09G1/06G09G3/20G09G3/34G09G3/36H04N5/66
CPCG09G3/342G09G2310/0237G09G2320/0285G09G2320/062G09G2320/0633G09G2320/103G09G2340/16G02F1/133
Inventor 本保信明
Owner HANNSTAR DISPLAY CORPORATION
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