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Method for improving partitioned halation of LED (Light Emitting Diode) backlight source and control device thereof

A technology of LED backlight and backlight value, applied to instruments, static indicators, etc., can solve problems such as difficulty, high cost, and non-compliance with manufacturing requirements, so as to improve processing speed, soften visual experience, and improve partition halo problems Effect

Inactive Publication Date: 2011-07-06
HISENSE VISUAL TECH CO LTD
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  • Summary
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Problems solved by technology

However, for the current higher and higher LCD display resolution, the difficulty and high cost of setting up so many and such small LED light sources do not meet the manufacturing requirements of the current technical level.

Method used

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  • Method for improving partitioned halation of LED (Light Emitting Diode) backlight source and control device thereof
  • Method for improving partitioned halation of LED (Light Emitting Diode) backlight source and control device thereof
  • Method for improving partitioned halation of LED (Light Emitting Diode) backlight source and control device thereof

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Embodiment Construction

[0028] Neighborhood smoothing is a commonly used method in the field of image processing. For example, the gray value of any point is the weighted average of several pixels in the neighborhood of the point. Field smoothing is often used in image processing processes such as noise removal and edge desalination. The present invention creatively introduces this idea into the process of processing the backlight, and improves the display effect of the LCD by "smoothing" the brightness of the backlight. The application basis of the present invention lies in that the human eye is very sensitive to the unbalanced brightness of adjacent pixels, requiring ≤2%, but not sensitive to the unbalanced brightness of large-area slowly changing. Therefore, the method of the present invention introduces the neighborhood smoothing of the backlight partition into the backlight brightness value processing process of the LED backlight partition, and can improve the halo problem of the partition by pe...

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Abstract

The invention relates to a method for improving the partitioned halation of an LED (Light Emitting Diode) backlight source and a control device thereof; the method comprises the following steps: carrying out partitioned statistics according to RGB (Red, Green and Blue) image data, and extracting the calculated value of the partitioned backlight brightness; carrying out neighborhood smooth processing on the calculated value of each partitioned backlight to generate the output value of the backlight brightness; and transmitting the output value of the backlight brightness to a backlight drive module, and driving the LED to be lightened. The device comprises a partitioned backlight value extracting module, a backlight value processing module and a backlight source driving module which are in communication connection in sequence so as to realize the method. In the invention, overlarge brightness difference between adjacent backlight zones is prevented through the smoothing processing on the backlight partition so that the brightness transition of the backlight zone is gentler; therefore, the partitioned halation problem of an LED backlight liquid crystal television can be effectively improved. Simultaneously, the scheme has less influence on the decreasing of brightness without influencing the display effect.

Description

technical field [0001] The present invention relates to an electronic display device, in particular to a brightness control method and a control device for improving the halo caused by different brightness of each backlight partition in a liquid crystal display device (especially a liquid crystal TV) using LED as a backlight source . Background technique [0002] LED (Light Emitting Diode), as a backlight source of a liquid crystal display device, was initially used in a liquid crystal display, and then was widely used in a liquid crystal television. Different from the previous cold cathode fluorescent tube (CCFL) backlight, LED uses a point light source as the light-emitting unit, and mainly direct-lit backlight. In the backlight module, a light-emitting dot matrix is ​​composed of multiple LEDs. For example, in the current 42-inch LED-backlit LCD TV, about 1 to 2 thousand LEDs are used. When controlling the backlight, the purpose of controlling the brightness of the LED ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 乔明胜刘卫东陈兴锋黄国鹏
Owner HISENSE VISUAL TECH CO LTD
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