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Method and system for dynamic backlight local control liquid crystal display

A local control and liquid crystal display technology, applied to static indicators, instruments, etc., can solve the problems of reducing image contrast and color saturation, black images are not black, etc.

Active Publication Date: 2012-07-11
上海易维视科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Second, reduce the contrast and color saturation of the displayed image. Due to the light leakage characteristics of the liquid crystal panel, if the backlight unit always emits light at the maximum brightness, it will cause the black image to not be black, and reduce the image contrast and color saturation.

Method used

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  • Method and system for dynamic backlight local control liquid crystal display
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  • Method and system for dynamic backlight local control liquid crystal display

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Embodiment 1

[0070] see figure 1 , the present invention discloses a liquid crystal display method for local control of dynamic backlight, said method comprising the following steps:

[0071] [Step S1] Input video signal image.

[0072] [Step S2] Calculate the pixel brightness of the input image.

[0073] Color image is expressed with RGB three colors, and the method for calculating color image brightness has multiple, and the present invention gets the maximum value of RGB value as brightness: I=MAX(R, G, B), wherein, MAX is to get maximum value manipulation.

[0074] [Step S3] Calculate the representative value of the local brightness of the input image.

[0075] Described step S3 comprises the following steps:

[0076] Step S31, counting the brightness histogram of the input image, starting from the maximum brightness level, accumulating the number of pixels of all brightness levels between the current brightness level and the maximum brightness level; if the accumulated result is g...

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Abstract

The invention discloses a method and a system for dynamic backlight local control liquid crystal display. The method comprises the following steps of: inputting video signal images; calculating pixel luminance of the input images; calculating local luminance representative values of the input images; calculating backlight local control values on the basis of the local luminance representative values of the images and backlight distribution characteristics; calculating backlight luminance values on the basis of the backlight local control values and the backlight distribution characteristics; compensating the input images on the basis of the backlight luminance values; outputting the backlight local control values to control the backlight luminance; and outputting the compensated video signal images. According to the method and the system, the power consumption of liquid crystal display devices can be reduced to a great extent; the dynamic contrast and the static contrast of the displayed images are improved to display in a high dynamic range; the color saturation is high, and colors have high fidelity; and the image detail expressive capability of the images is obviously improved. In addition, according to the method and the system, the problem of image quality brought by dynamic backlight liquid crystal display is effectively solved, inter-frame flicking is inhibited, and image artifact is prevented.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and relates to a liquid crystal display method, in particular to a dynamic backlight local control liquid crystal display method; at the same time, the invention also relates to a dynamic backlight local control liquid crystal display system. Background technique [0002] A liquid crystal display device (LCD) generally consists of a liquid crystal panel and a backlight unit. Normally, the backlight unit emits constant and uniform light to the liquid crystal panel, and then adjusts the light transmittance of the pixel units of the liquid crystal panel to display images. [0003] In this display mode, the luminous brightness of the backlight unit has nothing to do with the content of the displayed image. Whether it is a dark image or a bright image, the backlight unit always emits light at the maximum brightness, which leads to the following problems in the above liquid crystal displ...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 方勇李涛
Owner 上海易维视科技有限公司
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