Patent ID: 8035604

Claim:
Apparatus for driving a display to display a sequence of video frames, the display comprising a first modulator disposed to illuminate a second modulator, the apparatus comprising: a processor configured to: for each of the video frames output a first modulator driving signal for controlling the first modulator to emit light and output a second modulator driving signal for controlling the second modulator to modulate light emitted by the first modulator to display an image defined by image data for the video frame; wherein the processor is configured to: in response to key frame image data for a key video frame of the video frames, generate and output a first modulator driving signal for the key frame; generate a key frame luminance map based on the first modulator driving signal for the key frame; generate and output a second modulator driving signal for the key frame based at least on the key frame luminance map and the key frame image data; for one or more additional frames subsequent to the key frame, output the first modulator driving signal for the key frame and generate and output a second modulator driving signal based at least on the key frame luminance map and image data for the one or more additional frames.