Tear free updates of computer graphical output displays

Details Tear free updates of computer graphical output displays Tear free updates of computer graphical output displays

1993-09-24

1995-09-19

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345200, G09G 116

Patent

active

054519810

ABSTRACT:
A method of eliminating frame tears from the output display in a computer system including the steps of determining a safe region for furnishing data to a frame buffer, selecting a value of a first interrupt to signal the beginning of the safe region, determining the position of the scan from the frame buffer, comparing the value of the position of the scan from the frame buffer and the value of the first interrupt, and transferring information to the frame buffer only in response to the interrupt indicating a safe region.

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patent: 4953120 (1990-08-01), Nishiyama
patent: 5291188 (1994-03-01), McIntyre et al.
patent: 5371513 (1994-12-01), Drako et al.

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