Patent ID: 6909435
Filing Date: 2005-06-21
Classification: G09G

Abstract:
1. A method of reducing contouring in a liquid crystal on silicon (LCOS) display comprising individually controllable pixels, the display including at least one gamma correction table having a corresponding table resolution, the method comprising the steps of: providing an input signal comprising successive pictures to be displayed on said display; applying a first set of gamma correction values to a first picture portion of each of said successive pictures to provide corresponding gamma corrected first picture portions for each successive picture; applying a second set of gamma correction values to a second picture portion of each of said successive pictures to provide corresponding gamma corrected second picture portions for each picture; combining said gamma corrected first picture portion with said gamma corrected second picture portion to provide a picture comprising pixels having brightness levels determined by the combined picture portions; reducing the number of said pixels having repeated brightness levels in successive pictures without changing said table resolution by applying steps of table dithering and input dithering.