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LCD television set backlight control system and method

A technology for backlight control and LCD TV, which is applied in the parts of TV systems, TVs, electric light sources, etc., can solve problems such as dynamic control of backlight brightness, and achieve the effects of improving viewing comfort, improving luminous flux, and saving power consumption

Active Publication Date: 2008-07-02
SHENZHEN TCL IND RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a liquid crystal TV backlight control system and method, which solves the defect that the existing liquid crystal TV backlight is fixed to emit light as a whole, and cannot dynamically control the brightness of the backlight in different regions as the picture changes.

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  • LCD television set backlight control system and method
  • LCD television set backlight control system and method

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Embodiment Construction

[0023] The principle of the LCD TV backlight control system provided by the present invention is to independently control the brightness of each light source of the backlight according to the brightness difference of the video signal in each area, so that the black part of the same picture is darker and the bright part is brighter. While improving the contrast, it saves energy consumption and changes the backlight of the existing LCD TV. It cannot change with the change of the picture content. No matter what the picture is, the power of the whole machine remains unchanged. glow at the same time.

[0024] In order to realize sub-regional control of video signal backlight, it is necessary to carry out statistics and analysis on video signal sub-regions, please refer to figure 2 , the principle functional block diagram of the LCD TV backlight control system provided by the present invention, comprises video signal analysis unit 12, area data correction unit 14, area backlight si...

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Abstract

The invention discloses a liquid crystal television backlight control system and a method thereof, in which the backlight control system mainly comprises a video signal analyzing unit, a region data correcting unit, a region backlight signal control unit and an average illumination adjusting unit. The backlight control method comprises the following steps: performing statistics and analysis for the video signal by regions; correcting the video signal in individual backlight regions according to the analyzed result; and generating the backlight control signal for controlling the light emitting source at each region independently according to the analyzed result and performing dynamical illumination control for each light emitting source independently. The liquid crystal television backlight control method of the invention controls independently the illumination of each light emitting source according to the grayscale level distribution conditions of video signal at individual backlight regions, thus performing dynamical control on the backlight illumination by regions, saving power consumption, enhancing contrast, and improving observational comfort.

Description

【Technical field】 [0001] The invention relates to the image display field of liquid crystal televisions, in particular to a liquid crystal television backlight control system and method. 【Background technique】 [0002] At present, the performance of LCD TVs has been rapidly improved and is gradually entering our lives. But some inherent shortcomings are highlighted. [0003] see figure 1 , the existing CCFL backlight unit includes a circuit board, a plurality of CCFL lamps and a backlight board, and the plurality of CCFL lamps emit light together under the drive of the same signal of the circuit board. During the working process of the LCD TV, it always emits light at the same time with a fixed brightness. [0004] Since the backlight emits light as a whole, for a darker image, the black part cannot be very dark, and the white part is not bright; since the brightness of each backlight tube cannot change independently with the brightness of the content of the screen, no ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36G09G5/10G09G3/20G02F1/13357H05B37/02H04N5/14G02F1/1335
CPCY02B20/40
Inventor 冯万良施建华王晖
Owner SHENZHEN TCL IND RES INST
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