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Liquid crystal display and method for improving contrast ratio of image

A liquid crystal display and image contrast technology, which is applied in the field of image processing, can solve the problem of low image contrast, and achieve the effects of simple hardware implementation, improved image contrast, and cost savings

Inactive Publication Date: 2011-11-09
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the image contrast of this kind of liquid crystal display is not high

Method used

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  • Liquid crystal display and method for improving contrast ratio of image
  • Liquid crystal display and method for improving contrast ratio of image
  • Liquid crystal display and method for improving contrast ratio of image

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Embodiment Construction

[0015] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0016] figure 2 It is a schematic diagram of a liquid crystal display according to an embodiment of the present invention. The liquid crystal display includes a timing controller 210 , a programmable gamma generator (gamma generator) 220 , a driver 230 , and a liquid crystal panel 240 .

[0017] The timing controller 210 is used to generate a polarity inversion POL signal, and send the POL signal (polarity inversion signal) to the programmable gamma generator 220 . In one example, the frequency of the POL signal is half of the image refresh frequency of the liquid crystal display, that is, the period of the POL signal is twice the image refresh period.

[0018] The programmable gamma generator 220 stores multiple sets of gamma (gamma) voltage values, and periodically obtains different sets of gamma voltage values ​​...

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Abstract

The invention relates to a liquid crystal display and a method for improving contrast ratio of an image. The liquid crystal display comprises a gamma generator and a liquid crystal panel. The gamma generator stores a plurality of groups of gamma voltage values and periodically acquires one group of gamma voltage values from a plurality of groups of gamma voltages based on control of a polarity overturn POL signal. The liquid crystal panel displays an image based on a plurality of groups of gamma voltage values. By adopting the liquid crystal display provided by the invention, the contrast ratio of the image is improved, thus the liquid crystal display can be widely applied to display equipment.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a liquid crystal display and a method for improving image contrast. Background technique [0002] In recent years, liquid crystal display technology has become increasingly mature. Due to the advantages of thin, light, energy-saving, and soft screens, liquid crystal displays have almost completely replaced CRT TVs. However, due to the display characteristics of the liquid crystal display itself, the contrast of the liquid crystal display is not as good as that of the CRT TV. [0003] Liquid crystal panels cannot emit light on their own, and most of them are transmissive, which must rely on external light sources to present images. At present, most LCD TVs use cold cathode tubes and LED lights as backlight sources. In a liquid crystal display, each liquid crystal molecule corresponds to a TFT (thin film transistor), and the TFT can control the switch of each liquid crystal molecu...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 房好强徐爱臣
Owner HISENSE VISUAL TECH CO LTD
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