Patent ID: 7742034

Claim:
A color display device for displaying a color image, the color display device comprising: a liquid crystal light valve layer having a plurality of picture elements arranged in an array, at least two light sources having different radiance spectra and being activated alternately, color selection means for generating, together with said light sources, primary colors in said color image, an image controller which is adapted to divide each of a number of image information sets, each set being related to a color image to be displayed, into a first subframe, being multi-color picture element settings to be maintained during the operation of a first light source, and a second subframe, being multi-color picture element settings to be maintained during the operation of a second light source, and a display controller which is adapted to receive the subframes sent by the image controller and to send light source control signals and picture element control signals to the light sources and to the picture elements respectively; the display controller further being adapted to, in an alternating manner, shift the polarity of the picture elements between a first polarity and a second polarity, being opposite to the first polarity; the image controller and the display controller being adapted to cooperate to send subframes and shift polarity in such manner that a first subframe and a subsequent first subframe are matched with different polarities.