Patent ID: 6151001
Filing Date: 2000-11-21
Classification: G09G

Abstract:
A method of generating perceived grayscale for an image frame of Y by X size with P bits grayscale depth per pixel in a display system having N rows and X columns of pixels, such pixels allowed to be either off or on at any instant in time, and in which all pixels along selected rows can be updated in parallel, such method producing a unique interleave of both time and spacial distribution of on/off states perceived as grayscale and comprising:in a first cycle selecting from a logical list or algormithic computation of all rows arranged sequentially from 1 to N a sub-group, or grid, containing at least P members wherein members or sums of members of each sub-group are logarithmically related in logical position spacing but arranged in a pseudo-random distribution according to grayscale bit number which will determine an ordering in time, updating said sub-group with binary information generated from a mapping of grayscale bit values corresponding to grayscale bit positions in said sudo-random distribution, to pixels in a general mapping of said image, said general mapping being 1 to 1 and physically sequential in the X dimension but 1 to 1 and in a scattering distribution, not physically sequential, in the Y dimension determining an ordering in space, andcausing light to emit or not according to all updated and previously updated pixel on/off values if light emission is not inherent in updating process;in subsequent cycles selecting from the logical list of all rows arranged sequentially subsequent sub-groups containing above said members each wherein members of each sub-group are related and positioned in said first pseudo-random distribution and are sequential neighbors of previous selected sub-groups, said sub-groups updated with binary information generated from a mapping of grayscale bit values corresponding to grayscale bit positions in said pseudo-random distribution, to pixels in a general mapping of said image, said general mapping being 1 to 1 and physically sequential in the X dimension but 1 to 1 and in said scattering distribution, not physically sequential, in the Y dimension, andcausing light to emit or not according to all updated and previously updated pixel on/off values if light emission is not inherent in updating process, such cycles to continue until all Y rows have been chosen completing a frame; andimmediately and continuously repeating such cycling for subsequent frames which may contain new image information.