LCD TV intelligent dynamic backlight control method

A technology of LCD TV and backlight control, applied in static indicators, instruments, etc., can solve the problems of easy loss of image gray level, high energy consumption, and reduced image quality, so as to improve the comfort of human eyes and improve the dynamic contrast of the picture. , the effect of reducing the average brightness of the picture

Active Publication Date: 2010-06-23
KONKA GROUP
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Problems solved by technology

The existing backlight control is adjusted by the human eye to judge the brightness of the background of the image screen, and it is easy to lose the gray level of the image, thereby reducing the image qu...

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  • LCD TV intelligent dynamic backlight control method
  • LCD TV intelligent dynamic backlight control method

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Embodiment Construction

[0009] An intelligent dynamic backlight control method for LCD TVs. First, according to the comfort of human eyes, an analog function relationship is established between the brightness value of the current screen and the target value of the brightness of the backlight, as shown in the attached figure 1 As shown, Ymax / Ymid / Ymin are respectively defined as the maximum, middle, and minimum brightness values ​​of each frame; Bmax / Bmin are respectively defined as the maximum and minimum values ​​of the backlight brightness target; TP and Ymid determine the two-stage change slope; Dly_L / Dly_M / Dly_H is the time required to adjust the brightness of the backlight for each step corresponding to each segment. Overall, the target value of the brightness of the backlight increases with the increase of the brightness value of the current screen; then read the average brightness of each frame of image from the image chip value, which defines the weight ratio Q of the average brightness value...

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Abstract

Aiming at solving the backlight dynamic control problem of a liquid crystal display television (LCD TV), the invention provides a simple and easy LCD TV intelligent dynamic backlight control method, including the following steps: building up an analog function relationship between the current image brightness value and the desired backlight brightness value according to eye comfortableness of a watcher; reading the average brightness value of all frames of images from an image chip, and calculating the current image brightness value through the average brightness value; working out the desired backlight brightness value according to the function relationship between the current image brightness value and the desired backlight brightness value; and finally changing the backlight brightnessof the screen of the LCD TV to be the desired backlight brightness value. The method is simple, easy and mature and can substantially improve the image dynamic contrast ratio of the LCD TV and reach the purposes of reducing the average brightness of the image, improving the eye comfortableness, saving energy and reducing energy consumption.

Description

technical field [0001] The invention relates to a liquid crystal television backlight control method, in particular to an liquid crystal television intelligent dynamic backlight control method. Background technique [0002] Existing LCD TV users feel the brightness of the TV screen through human eyes, and then adjust the brightness of the screen by manually adjusting the backlight intensity. The TV system receives the backlight adjustment command and the backlight brightness value sent by the user, and the system executes this command to change Screen backlight brightness, realize backlight control function. The existing backlight control is adjusted by human eyes to judge whether the background of the image is bright or dark, so it is easy to lose the gray level of the image, thereby also reducing the image quality. At the same time, since the brightness of the backlight does not change with the brightness and darkness of the background of the screen, the brightness of the...

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Application Information

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IPC IPC(8): G09G3/36
Inventor 周波黄运汉
Owner KONKA GROUP
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