Patent ID: 6262751
Filing Date: 2001-07-17
Classification: G06F,G06T,G09G

Abstract:
A computer system comprising:A) a central-processing unit for generating update data signals representing the values of picture elements arrayed in image-pixel rows and columns and for generating corresponding update-address signals identifying rows and columns of the picture elements whose values the update data signals represent; andB) display system that includes:i) an image memory comprising N separately operable memory modules numbered 0 to N-1 that together provide memory locations organized in memory-location rows and columns, the (n mod N)th memory module containing the nth memory-location row, the image memory being responsive to update data signals representing the values of picture elements arrayed in image-pixel rows and columns, and to corresponding update-address signals identifying rows and columns of the picture elements whose values the update data signals represent, to store in only one module at a time the values represented by the update data signals in memory-location rows and columns identified by corresponding update-address signals, the image memory further generating memory output signals simultaneously representing the contents of the memory locations in all memory modules identified by refresh-address signals applied thereto;ii) a refresh-address generator for generating and applying to the image memory refresh-address signals that sequentially identify successive memory-row positions along each of a plurality of successively scanned memory columns; andiii) a display device for displaying, in successive display column positions along a respective display row, the pixel values represented by the memory output signals generated in response to the refresh-address signals that identify successive memory-row positions along each of the plurality of successively scanned memory columns.