Patent ID: 6028596
Filing Date: 2000-02-22
Classification: A63F,G09G

Abstract:
An image creation apparatus for driving a display device having a screen with a plurality of pixels arranged in matrix form, said image creation apparatus comprising:a bit-mapped video memory having addresses corresponding to the individual pixels of said display device;a dot pattern data memory for storing common dot pattern data of each of a plurality of common dot patterns formed of a plurality of pixels, the dot pattern data memory storing the common dot pattern data in a compressed state;an image creator for reading the common dot pattern data in units of the common dot patterns from the dot pattern data memory and writing decompressed common dot pattern data into the bit-mapped video memory in accordance with a predetermined image creation program to create an image on the screen of the display device, the image creator including:a reader for reading the common dot pattern data in the compressed state; anda writer for writing the decompressed common dot pattern data derived from the common dot pattern data read from the dot pattern data memory into the bit-mapped video memory, the writer including a decompression means for decompressing the common dot pattern data read by the reader into the decompressed common dot pattern data; andmeans for applying the decompressed common dot pattern data written in the bit-mapped video memory to the display device.