Patent ID: 8411022

Claim:
A display system comprising: a display panel comprising a subpixel group having a plurality of subpixels; a backlight providing a light to the subpixels of the display panel; a backlight controller providing backlight signals to the backlight to modulate the amount of the light provided by the backlight to the display panel; a surveying module surveying image data and generating a peak value signal, the surveying module storing a peak value that pertains to a frame, the surveying module comparing the peak value with at least one color value to determine a maximum luminance value; a last frame peak module calculating a color gain and intermediate backlight signals based on the peak value signal and providing the intermediate backlight signals to the backlight controller, the last frame peak module inverting the peak value signal and storing the inverted peak value signal in a normal value register, calculating the intermediate backlight signals from the inverted peak value signal and eliminating a quantization error from the intermediate backlight signals; and a circuit modulating the image data according to the intermediate backlight signals and providing the modulated image data to the display panel.