Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-09-06
1998-04-07
Chow, Dennis-Doon
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345145, 345 98, 345 87, G09G 500
Patent
active
057369810
ABSTRACT:
A display control apparatus for a display device, capable of updating a display state for a display element subjected to a change in display updating, includes a display data memory for storing display data, and a display controller capable of sequentially reading out the display data stored in the memory and transferring the readout display data to the display device at a predetermined period and capable of performing a partial rewrite operation of the display data stored in the memory. A rewrite detector detects an address for accessing the display data memory to cause the display controller to perform the partial rewrite operation, a specific pattern rewrite detector detects an address of display data subjected to a rewrite operation of the specific pattern and stored in the display data memory, and a rewrite address generator preferentially transfers the address detected by the specific pattern rewrite detector over the address detected by the rewrite detector, reads out the display data from the display data memory at the transferred address, and transfers the readout data to the display device.
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patent: 5091723 (1992-02-01), Kanno et al.
patent: 5099331 (1992-03-01), Truong
patent: 5289173 (1994-02-01), Numao
patent: 5408247 (1995-04-01), Enomoto et al.
Matsuzaki Eiichi
Morimoto Hajime
Nobutani Toshiyuki
Ono Kenichiro
Sakashita Tatsuya
Canon Kabushiki Kaisha
Chow Dennis-Doon
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