On-screen display controller

Details On-screen display controller On-screen display controller

1989-05-11

1991-12-10

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

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

340734, 340735, G09G 114

Patent

active

050722140

ABSTRACT:
A character-based display controller, which is capable of providing variable width text characters, includes a ROM embedded with pattern and attribute codes, and a logic control circuit enabling multiple modes of interpreting the data in the character memory. The logic control circuit also enables bypassing the character memory thereby permitting a bit-mapped display mode.

REFERENCES:
patent: 3624632 (1971-11-01), Ophir
patent: 3996584 (1976-12-01), Plager
patent: 4357604 (1982-11-01), Imazeki et al.
patent: 4555191 (1985-11-01), Gojo
patent: 4682161 (1987-07-01), Bugg
patent: 4742344 (1988-05-01), Nakagawa et al.
patent: 4755814 (1988-07-01), Olsen
patent: 4868554 (1989-09-01), Aoki et al.
"IBM Technical Disclosure Bulletin", vol. 23, No. 8, Jan. 1981, pp. 3791-3792.

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