Graphic display scan line blanking capability

Details Graphic display scan line blanking capability Graphic display scan line blanking capability

1984-09-17

1987-02-10

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340723, 340747, 340748, 340799, C09G 116

Patent

active

046426264

ABSTRACT:
The invention pertains to a computer display system for displaying text and graphics on a scan line basis wherein a scan line windowing apparatus for selectively blanking the graphics display is provided.
A bit map memory, in addition to storing information to be displayed on a CRT, further stores a bit for each scan line which is utilized to control the enabling or disabling of a portion of the information in the bit map memory which is to be displayed on the CRT.

REFERENCES:
patent: 4470042 (1964-09-01), Barnich et al.
patent: 4498081 (1985-02-01), Fukushima et al.
patent: 4520356 (1985-05-01), O'Keefe et al.
patent: 4542376 (1985-09-01), Buss et al.

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