Patent ID: 9041728
Filing Date: 2015-05-26
Classification: G09G

Abstract:
1. An image display device for performing a dithering algorithm process, the image display device comprising: a bit processing circuit mixing first pixel data with random data and compensation data to generate second pixel data, wherein a value of the compensation data is determined according to a position of the first pixel data in the image frame; a bit truncator circuit truncating partial bits of the second pixel data to generate third pixel data; at least one random generator unit, each providing the random data to the bit processing circuit; a pattern generator unit generating a pattern of the image frame, wherein the pattern represents a compensation bit of each pixel or sub-pixel in the image frame, and wherein the bit processing circuit comprises: a bit mapping and selector unit receiving the random data and accordingly generating a random value; a compensation determination unit coupled to the bit mapping and selector unit and the pattern generator unit, receiving the random value and determining whether to output the compensation data according to the compensation bit; an adder unit coupled to the compensation determination, mixing the compensation data to the first pixel data and generating the second pixel data, wherein if the compensation bit is 0, the compensation determination unit does not output the random value as the compensation data, and if the compensation bit is 1, the compensation determination unit outputs the random value as the compensation data to the adder unit.