Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1985-05-30
1987-07-07
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340814, 340735, G09G 100
Patent
active
046790276
ABSTRACT:
A video display control unit controls characters to be displayed on a sequential scanning display unit (4). Namely, it reads address-specifying information and attribute information from a video memory (5) along scanning sequence of a screen in a continuous and address-unit time-divisional manner on the basis of address signals from a memory address counter (6). The read attribute information is outputted on a multiplex bus (42) through a gate (34) and delayed by a predetermined period by a pipeline register (40) to be supplied to a video signal encoder (18). The read address information is supplied to a character generator (16) so that character information is read from the character generator (16). The character information is outputted on the multiplex bus (42) through a gate (36) and delayed by a predetermined period in a pipeline register (38) to be supplied to the video signal encoder (18). The video signal encoder (18) outputs video signals on the basis of the attribute information and the character information.
REFERENCES:
patent: 4345244 (1982-08-01), Greer et al.
patent: 4401985 (1983-08-01), McVoy et al.
patent: 4485378 (1984-11-01), Matsui et al.
patent: 4581611 (1986-04-01), Yang et al.
patent: 4591845 (1986-05-01), Komatsu et al.
"Dedicated Processor Shrinks Graphics Systems to 3 Chips", Bob Williamson and Peter Rickert, Electronics Design, Aug. 4, 1983, pp. 143-146 and 148.
"VLSI CRT Controller Cuts Parts Count of Displays", Richard Nesin, Electronic Design, Feb. 9, 1984, pp. 135-138, 140, 142 and 144.
Curtis Marshall M.
Mitsubishi Denki & Kabushiki Kaisha
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