Display apparatus

Details Display apparatus Display apparatus

1983-10-27

1986-09-23

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340723, 340747, 340799, G09G 114

Patent

active

046138528

ABSTRACT:
In a display apparatus comprising a plurality of memory planes, and a graphic display controller for writing data in and reading data from the memory planes, a logical operation circuit capable of performing logical operation in a plurality of different modes of operation is provided and is controlled to perform, in the mode latched in a mode registration circuit, logical operation on the data read from the memory planes. A selector selectively outputs data from one of the memory planes or data from the logical operation circuit.

REFERENCES:
patent: 4149184 (1979-04-01), Giddings et al.
patent: 4183046 (1980-01-01), Dalke et al.
patent: 4303986 (1981-12-01), Lans
patent: 4509043 (1985-04-01), Mossaides
O'Brien et al., "Videotex Presentation Level Procotol: Augmented Picture Description Instructions" (Feb. 1982).
PD7220 GDC User's Manual; Nippon Electric Co., Ltd. (Mar. 1982).

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