Patent ID: 8629829

Claim:
A processing device for a high dynamic contrast of a liquid crystal display, in comprising: a receiver for receiving a low-voltage differential signal data; a center processing module for performing a histogram-statistical processing on said low-voltage differential signal data, obtaining a backlight source luminance control parameter and a gamma reference voltage parameter for the same frame of picture according to the result of the statistical processing, and generating a pulse-width-modulation dimming control signal and a group of gamma reference voltages; an inverter for receiving the pulse-width-modulation dimming signal from said center processing module and adjusting the luminance of the backlight source by adjusting a duty ratio of the pulse-width-modulation dimming control signal; and a source driver integrated circuit for receiving the gamma reference voltage from said center processing module and driving a liquid crystal panel, whereby the voltage of a pixel capacitor on the liquid crystal panel is adjusted synchronously with the adjusting of the luminance of the backlight source, according to the gamma reference voltage parameter, and thus the transmittance ratio of the pixel points on the liquid crystal pane is changed such that the luminance of the liquid crystal panel is kept unchanged after the luminance of the backlight source varies.