Patent ID: 8854295

Claim:
A liquid crystal display comprising: a backlight having a plurality of light sources each configured to emit light, light intensity of each light source being controllable; a liquid crystal panel configured to display a video picture in a plurality of illumination regions corresponding to the light sources by modulating the light from the backlight; an intensity value calculator configured to calculate representative intensity values of the illumination regions based on an input video signal including signal values of a plurality of pixels; a weight calculator configured to perform a smoothing process on the representative intensity values in spatial domain by using first weights which are defined for the illumination regions, and to calculate second weights of the illumination regions such that the second weights have larger values as differences between smoothed values of the representative intensity values and the representative intensity values are larger when the smoothed values of representative intensity values are smaller than the representative intensity values, and have a predetermined value when the smoothed values of representative intensity values are larger than or equal to the representative intensity values, respectively; an intensity value corrector configured to correct the representative intensity values of the illumination regions based on the second weights and perform a smoothing process on corrected representative intensity values in spatial domain to obtain light source intensity values of the light sources; an intensity distribution estimator configured to estimate light intensity distribution in the illumination regions when the light sources emit the light with the light source intensity values; a signal corrector configured to correct the input video signal based on the intensity distribution to obtain a corrected video signal; a light source controller configured to control the light sources so that the light sources emit light with intensity having the light source intensity values; and a liquid crystal controller configured to control modulation of the liquid crystal panel in accordance with the corrected video signal.