Patent ID: 7420571

Claim:
A method for controlling display of images in a display device, comprising: (a) receiving a pixel value having an integer part and a fraction part; (b) performing a random error diffusion operation on the pixel value, said operation including: adding one or more error diffusion coefficient values derived for one or more corresponding neighboring pixels, a first random coefficient value, and a first predetermined number of bits of the fraction part of the pixel value to form a carry value, and adding the carry value to a second predetermined number of bits of the fraction part of the pixel value to form a sum, the integer part of the pixel value and the sum forming a random error-diffused value having a number of bits less than the pixel value; (c) performing a random dithering operation on the random error-diffused value using a second random coefficient value to form dithered video data; and (d) generating an image for display based on the dithered video data.