Patent ID: 7042422
Filing Date: 2006-05-09
Classification: G09G

Abstract:
1. A method for processing video pictures for displaying on a display device having at least two kinds of luminous elements with different time responses, a first kind of luminous elements having a first time response and at least a second kind of luminous elements having a second time response, the second time response being faster than the first time response, said method comprising: driving each luminous element within a video frame or video field period by time impulses organized in sub-fields; wherein the time duration of a video frame or video field period is divided into a plurality of sub-fields during which the luminous elements can be activated for light emission in small pulses corresponding to a sub-field code word which is used for brightness control; forming a first group of sub-fields for driving at least the first kind of luminous elements; forming a second group of sub-fields for driving the second kind of luminous elements; arranging the second group of sub-fields behind the first group of sub-fields within the video frame or video field period; performing a sub-field coding process, in which sub-field code words are determined for driving the display, wherein for the sub-field code words that are used for activating light emission in the luminous elements of the first kind, active bit entries are made only for the sub-fields of said first group of sub-fields, and wherein for the sub-field code words that are used for activating light emission in the luminous elements of the second kind, active bit entries are made for the sub-fields of said first group and said second group of sub-fields; forming at least a third group of sub-fields dedicated for driving the luminous elements of the second kind, and arranging the third group of sub-fields behind the sub-fields of the second group in the frame period and in the sub-field coding process generating sub-field code words that are used for activating light emission in the luminous elements of the second type, where active bit entries are made also for the sub-fields of said third group of sub-fields.