Dimmer and dimmer override control for a display device

Details Dimmer and dimmer override control for a display device Dimmer and dimmer override control for a display device

1981-05-29

1982-10-19

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 520, H04N 558

Patent

active

043553346

ABSTRACT:
A dimmer and dimmer override control is described for adjusting the amplitude of a video signal applied to a video display device. The control includes an amplifier for amplifying a video input signal, a light sensor for generating a dimmer control signal corresponding to the intensity of ambient light, and a transistor clipping circuit which clips the video signal at levels which vary as a function of the amplitude of the dimmer control signal. The clipping action is defeated by another transistor circuit which responds to a dimmer override signal for disabling the transistor clipping circuit.

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