Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1994-09-08
1998-04-21
Powell, Mark R.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345511, G06F 1564
Patent
active
057422818
ABSTRACT:
According to the image control device of this invention, when the data lines of the VRAMs (105 to 108) are matched with the data lines of the CPU, the bus converting circuits (101 to 104, 150) are provided between the CPU and the VRAMs (105 to 108) and between the VRAMs (105 to 108) and the display system respectively, at least two independent frames are constructed by at least two VRAMs (105 to 108), and the independence thereof is kept through address control of the bus converting circuits (101 to 104, 150) and the VRAMs (105 to 108), so that the simultaneous multi-bit access from the drawing device (100) can be performed.
REFERENCES:
patent: 4037209 (1977-07-01), Nakajima et al.
patent: 4482979 (1984-11-01), May
patent: 4604615 (1986-08-01), Funahashi
patent: 4609917 (1986-09-01), Shen
patent: 4628305 (1986-12-01), Ikeda
patent: 4634970 (1987-01-01), Payne et al.
patent: 4818979 (1989-04-01), Manson
patent: 5349372 (1994-09-01), Sellers
Powell Mark R.
Seiko Epson Corp.
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