Self-raster circuit of a monitor

Details Self-raster circuit of a monitor Self-raster circuit of a monitor

1997-01-13

1999-08-24

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Data responsive crt display control

345 11, 345 12, 345 13, 345 22, G09G 106

Patent

active

059430281

ABSTRACT:
A self-raster circuit of a monitor capable of providing color rasters to a cathode ray tube of the monitor if no video signal is inputted to the monitor from a computer. The self-raster circuit includes a detecting section for detecting whether or not a video signal is inputted to the monitor from the computer, and a control section for outputting a variety of pulse-width-modulated signals corresponding to predetermined colors to a video amplifying section of the monitor if it is detected by the detecting section that no video signal is inputted from the computer.

REFERENCES:
patent: 4020280 (1977-04-01), Kaneko et al.
patent: 4516118 (1985-05-01), Wahlquist
patent: 4720803 (1988-01-01), Ishii
patent: 4766493 (1988-08-01), Kim
patent: 5504521 (1996-04-01), Webb et al.
patent: 5670972 (1997-09-01), Kim
Abstract: Japio Accession No. 03/204,180 and JP 020,179,680 (NEC); Published Jul. 12, 1990.

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