LCD television set backlight control system and method

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...

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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