Software controllable hardware CRT dimmer

Details Software controllable hardware CRT dimmer Software controllable hardware CRT dimmer

1986-09-12

1988-01-26

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358174, 358220, 340793, H04N 557, H04N 568

Patent

active

047220058

ABSTRACT:
An apparatus for controlling a video display on a viewing screen such that it will not burn in the screen when the image is left unchanged for a prolonged period of time. A software controlled dimming circuit implements a shifting operation to the digital signal when activated. The shifting results in a lowering of intensity of the screen, yet retaining the original image on the screen.

REFERENCES:
patent: 4223353 (1980-09-01), Keller
patent: 4494137 (1985-01-01), Freyberger

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