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Image processing method in LCD

A liquid crystal display and image processing technology, which is applied to static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of backlight brightness adjustment, image data backlight brightness adjustment, non-correlation, uneven contrast, etc., to improve Effects of contrast, increasing color levels, and reducing power usage

Active Publication Date: 2009-10-14
AU OPTRONICS CORP
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Problems solved by technology

[0003] However, although adjusting the input image data can achieve the purpose of improving the image contrast, in the existing practice, the required backlight brightness is adjusted after the input image data is changed; in other words, the image data processing and the backlight brightness The adjustments are independent of each other
In this way, the brightness of the backlight cannot be adjusted relative to the image data, and the contrast of some parts of the entire image may be uneven, or the user may feel that some parts are particularly special when viewing the image. Bright or very dark situations occur

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Embodiment Construction

[0016] figure 1 It is a schematic block diagram illustrating an image processing system in a liquid crystal display according to an embodiment of the present invention. The image processing system includes a backlight parameter generating circuit 102 , a pulse width modulation (PWM) signal generating circuit 104 and an image grayscale conversion circuit 106 . The backlight parameter generation circuit 102 can receive input image data, and generate a backlight index according to the received input image data, and then transmit the backlight index to the pulse width modulation signal generation circuit 104 and the image gray scale conversion circuit 106 respectively. middle. The PWM signal generating circuit 104 generates a corresponding PWM signal according to the received backlight parameters, so as to control the brightness of the backlight. The image grayscale conversion circuit 106 converts the input image data into output image data according to the received backlight pa...

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Abstract

The present invention relates to an image processing method of a liquid crystal display, comprising the following steps: obtaining backlight parameters according to image data; adjusting the backlight according to the backlight parameters; obtaining a gray scale reference value according to the adjusted back light source, wherein the gray scale reference value is between Between the first grayscale boundary value and the second grayscale boundary value; when the grayscale value of the image data is between the grayscale reference value and the first grayscale boundary value, the grayscale value of the image data is converted according to the backlight parameter converting to a corresponding output grayscale value; and when the grayscale value of the image data is between the grayscale reference value and the second grayscale boundary value, converting the grayscale value of the image data into a corresponding grayscale value according to a linear relationship The output grayscale value of . According to the invention, the contrast of the video picture can be improved, and the color levels displayed by the video picture can be increased, so that the video picture is more vivid.

Description

technical field [0001] The present invention relates to an image processing method, and in particular to an image processing method of a liquid crystal display. Background technique [0002] In general displays, the technology for improving image contrast is mainly to process the input image data, and determine the original input image data by analyzing various characteristics of the entire image data on the image histogram. Change the amount, and adjust the required backlight brightness, so that the difference between adjacent gray scale values ​​becomes larger, thereby improving the contrast of the image. [0003] However, although adjusting the input image data can achieve the purpose of improving the image contrast, in the existing practice, the required backlight brightness is adjusted after the input image data is changed; in other words, the image data processing and the backlight brightness The adjustments are independent of each other. In this way, the brightness ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/34G09G3/20G09G5/02
Inventor 简民峰周明忠谢曜任何宇玺
Owner AU OPTRONICS CORP
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