Patent ID: 8022909
Filing Date: 2011-09-20
Classification: G09G

Abstract:
1. A circuit for generating grayscales in a display, comprising: a plurality of grayscale values, one of the grayscale values being a present grayscale value; a grayscale pattern, each grayscale pattern comprising at least one pattern bit and each grayscale pattern corresponding to each of the grayscale values, wherein a pixel of the display is turned to either an on state or an off state according to the grayscale pattern such that the pixel is not in a current state more than a predetermined number of counts, the predetermined number of counts being less than a total number of counts; a programmable register configured to store at least one grayscale pattern; a first row multiplexer corresponding to the plurality of grayscale values, the first row multiplexer configured to receive a pattern bit from each grayscale pattern, the first row multiplexer configured to select a desired grayscale pattern, determined from the present grayscale value; a pixel select circuit configured to determine a desired pattern bit based on a sum of the following: a frame count, a row count, and a column count, wherein the pixel select circuit includes an adder coupled to a plurality of registers, the sum indicating a starting point within the desired grayscale pattern randomly selected for a pixel; and a second row multiplexer coupled to the first row multiplexer and configured to receive a bit select signal comprising the sum and to select the desired pattern bit.