Brightness adjusting method of LCD TV backlight

A technology of backlight brightness and LCD TV, which is applied in the direction of TV, color TV, color TV parts, etc. It can solve problems such as difficult backlight adjustment and inability to correctly sense background brightness, so as to improve comfort, reduce power consumption, and enhance The effect of contrast
CN100542236CInactive Publication Date: 2009-09-16SHENZHEN TCL IND RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN TCL IND RES INST
Publication Date
2009-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The method comprises: creating a peak brightness table relating to the mean image level; reading out the RGB data of one frame of video signal; calculating the mean image level of said one frame of image; according to the mean image level, searching the relative peak brightness from the peak brightness table relating to the mean image level; according to the relative peak brightness, calculating the duty ratio; inputting the duty ratio into the pulse width modulator located in the backlight controlling unit of the LCD TV; adjusting the backlight brightness of the LCD TV; making the inversed control for the image to increase the signal brightness. The invention increases the contrast of TV images.
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Description

【Technical field】

[0001] The invention relates to a method for adjusting the brightness of the backlight of a liquid crystal television, in particular to a method for automatically adjusting the brightness of the backlight of the liquid crystal television according to the brightness of the television picture. 【Background technique】

[0002] Recently, with the development of display technology, liquid crystal displays (LCDs) have become more and more widely used. Compared with traditional CRT (cathode ray tube) TVs, LCD TVs (LCD-TVs) have the advantages of light weight, small size, environmental protection and energy saving, etc., and have gradually been favored by consumers.

[0003] When playing a TV picture, the peak brightness of a CRT TV will decrease as the average picture level (Average Picture Level, APL) increases. That is, when a large-area high-brightness picture appears, the peak brightness of the entire TV picture will also decrease accordingly, which will not c...

Claims

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