Liquid crystal display device and driving method thereof

A technology of liquid crystal display and driving method, which is applied to static indicators, instruments, nonlinear optics, etc., can solve the problems of slow movement in the horizontal black interval and uneven color temperature of the picture, so as to solve the phenomenon of picture flicker, improve picture quality, and improve slowly moving effect

Active Publication Date: 2008-01-30
AU OPTRONICS CORP
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Problems solved by technology

[0011] Since the scan signal S scan (1)~S scan The timings of (m) are different, therefore, the phase delay of the liquid crystal between the liquid crystal response curves LC(a)-LC(d) will cause human eyes to perceive the uneven color temperature of the picture of the liquid crystal display panel 410 and produce a horizontal black interval (Band ) slow-moving phenomenon

Method used

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  • Liquid crystal display device and driving method thereof
  • Liquid crystal display device and driving method thereof
  • Liquid crystal display device and driving method thereof

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Embodiment Construction

[0042] Please refer to FIG. 6 , which is a block diagram of a liquid crystal display according to a preferred embodiment of the present invention. The liquid crystal display 60 includes a liquid crystal display panel 610 , a backlight module 620 , a dimming control unit 630 and a backlight module driving circuit 640 .

[0043] The liquid crystal display panel 610 has a plurality of horizontal display areas, such as horizontal display areas 610(1)-610(n), and each horizontal display area has a plurality of pixels.

[0044]The backlight module 620 includes a plurality of light emitting elements 622, each of which is a pixel corresponding to the horizontal display areas 610(1)˜610(n), and n is a positive integer. The backlight module 620 is, for example, an Impulse Type backlight module, and the light emitting element 622 is, for example, a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL), a light emitting diode (Ligbt Emitting Diode, LED) or a plasma display (...

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Abstract

The present invention relates to a liquid crystal display and its drive method. Said liquid crystal display includes liquid crystal display panel, backlight module, dimming control unit and backlight module drive circuit. Said liquid crystal display panel has first display area and second display area. The backlight module includes several luminous elements, these luminous elements are respectively correspondent to the pixels of first display area and second display area. Said dimming control unit is used for producing at least a dimming control signal, and the dimming frequency of the dimming control signal is the multiple of picture refreshed frequency of the liquid crystal display panel. The backlight module drive circuit can be used for cyclically and successively driving luminous elements according to dimming control signal.

Description

technical field [0001] The present invention relates to a liquid crystal display and its driving method, and in particular to a liquid crystal display and its driving method which can improve picture flickering. Background technique [0002] In order to improve the image quality of the liquid crystal display, a blinking backlight module (Blinking Backlight) is proposed in the industry today, which utilizes the control of the on and off of the light-emitting elements to reduce image afterimages and improve animation quality. [0003] The dimming method of the flashing backlight module can be divided into two types, the first method is called analog dimming (Analog Dimming), and the second method is called pulse dimming (Burst Dimming). [0004] Please refer to FIG. 1 , which shows the output voltage waveform diagram of changing the brightness of the lamp by analog dimming. Analog dimming is to use the control inverter (Inverter) to drive the output voltage amplitude of the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G02F1/13357G02F1/1335
Inventor 徐智哲吕丽如
Owner AU OPTRONICS CORP
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