Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-06-01
1997-12-16
Wu, Xiao
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345141, 345201, G09G 500
Patent
active
056990774
ABSTRACT:
A screen display circuit, comprising: a register 13 storing data designating a screen whereon a pattern is displayed, and a position of the pattern on the screen; a RAM 4 storing data designating the pattern; first and second buffers 15, 16 which temporarily stores and output addresses of the patterns to be displayed respectively on the first and second screens; a ROM 5 storing a plurality of font data; a switch 17 which connects the ROM 5 alternately to the first buffer 15 and the second buffer 16; and a mixing circuit 22 which composes dot data of the patterns to be displayed on the first and second screens outputted alternately from the ROM 5, whereby the first screen and the second screen, whereon dot patterns are respectively displayed, are composed and displayed on a display apparatus. As a result, hardwares can be reduced and a manufacturing cost can be reduced.
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Mitsubishi Denki & Kabushiki Kaisha
Wu Xiao
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