Auto brightness limiter circuit for television

Details Auto brightness limiter circuit for television Auto brightness limiter circuit for television

1982-12-16

1985-05-28

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358243, 358147, H04N 514, H04N 568

Patent

active

045203970

ABSTRACT:
An automatic brightness limiter circuit is disclosed in which a separate digital signal display from a personal computer is superimposed on a television broadcast screen and displayed simultaneously with a video broadcast signal. The beam current of the cathode ray tube is detected and if found to exceed a prescribed value, feedback is applied only to the video amplifier circuit amplifying the video signal. Feedback is not applied to the amplifier circuit of the digital signal display. The amplifier of this digital signal display is arranged so that independent limiting action is carried out corresponding to the amplitude of the digital signal.

REFERENCES:
patent: 4253110 (1981-02-01), Harwood et al.

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