Patent ID: 6906726

Claim:
A display device for displaying an image in response to a video signal on a display screen, with a plurality of display cells being provided as pixels in the display screen and a pixel group being defined by a plurality of pixels, the display device comprising: a display having the display screen; a dither coefficient generator for generating dither coefficients for respective pixels in the pixel group such that the dither coefficients are allotted to respective pixel positions in the pixel group; a dither adder for adding the dither coefficients to respective pixel data, each pixel data corresponding to each pixel in the pixel group, derived from the video signal to obtain dither-added pixel data; and a display drive for causing the display cells to emit light with brightness corresponding to the respective dither-added pixel data, wherein said dither coefficient generator comprises a selection device, a first dither matrix circuit and a second dither matrix circuit, and wherein further the selection device is operable to selectively choose between different respective sets of dither coefficients from the first and second dither matrix circuits depending on whether or not a brightness level of the image displayed by the pixel data is within a predetermined brightness range.