Graphic display with right-protected areas

Details Graphic display with right-protected areas Graphic display with right-protected areas

1986-03-27

1991-12-10

Herndon, Heather R.

G06F 1520

Patent

active

050724096

ABSTRACT:
The speed at which a display screen is updated is increased by updating only those areas of the screen that have changed since the last update. This is accomplished by dividing the screen display elements into a grid of contiguous areas, and defining those areas which changing video information as unprotected areas and other areas as protected areas. As new images are generated, the memory containing information displayed in the protected areas is protected from updating while that in the unprotected area is not protected.

REFERENCES:
patent: 4204206 (1980-05-01), Backula et al.
patent: 4570181 (1986-02-01), Yamamura
patent: 4811241 (1989-03-01), Liang

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