Control method of automatic backlight adjustment speed of LCD TV
A technology for adjusting LCD TVs and backlights, which is applied to parts of color TVs, parts of TV systems, TVs, etc., can solve problems such as easy flickering of pictures, and achieve the effect of reducing flickering phenomenon and improving the quality of graphics.
Inactive Publication Date: 2011-12-21
SICHUAN CHANGHONG ELECTRIC CO LTD
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[0003] The technical problem to be solved by the present invention is to propose a method for controlling the automatic backlight adjustment speed of LCD TVs, so as to solve the problem that the screen is easy to flicker in the automatic backlight adjustment of LCD TVs in the traditional technology
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[0018] The present invention will be further described below in conjunction with the accompanying drawings.
[0019] The present invention proposes a method for controlling the automatic backlight adjustment speed of LCD TVs, which solves the problem that the screen is easy to flicker in the automatic backlight adjustment of LCD TVs in the traditional technology, such as figure 1 As shown, the implementation method is as follows:
[0020] 1. Obtain the grayscale histogram of the current frame and the grayscale histogram of the previous frame image, and the average brightness value of the current frame image;
[0021] 2. Calculate the degree of difference between the above two grayscale histograms; the calculation method is as follows:
[0022] D = ( Σ j = 1 n | ...
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The invention relates to liquid crystal television terminal application technology, in particular to a control method for automatic backlight adjustment speed of liquid crystal television. The technical problem to be solved by the present invention is to propose a method for controlling the automatic backlight adjustment speed of the LCD TV, and to solve the problem that the picture is easy to flicker in the automatic backlight adjustment of the LCD TV in the traditional technology. The main points of the technical solution can be summarized as follows: obtain the gray histogram of the current frame and the gray histogram of the previous frame image, and the average brightness value of the current frame image; calculate the difference between the above two gray histograms; The average brightness value of the current frame image and the saved scene state of the previous frame image jointly determine the speed of backlight adjustment. The invention has the beneficial effects of reducing the flickering phenomenon in the automatic backlight adjustment of the liquid crystal television, and having better graphic quality.
Description
technical field [0001] The invention relates to liquid crystal television terminal application technology, in particular to a control method for automatic backlight adjustment speed of liquid crystal television. Background technique [0002] Most of the current LCD TVs have the function of adjusting the backlight. Automatic adjustment of the backlight of the LCD screen according to the image content can not only improve the contrast, but also achieve the purpose of energy saving, so it is widely used. At present, most of the automatic backlight adjustment methods for LCD TVs are automatically adjusted according to the average brightness (APL) of the screen and related image parameters. However, when the content of the moving image changes during automatic backlight adjustment, if the backlight Improper control of the adjustment speed and amplitude will cause the screen to "flicker", which will make users feel uncomfortable when watching the program. Contents of the inventi...
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IPC IPC(8): H04N5/57G09G3/36
Inventor 王少亮杨燕
Owner SICHUAN CHANGHONG ELECTRIC CO LTD