Power switch for multiple operating sections of television set

Details Power switch for multiple operating sections of television set Power switch for multiple operating sections of television set

1992-10-30

1994-02-15

Kostak, Victor R.

Television

Receiver circuitry

Power supply

348725, H04N 563

Patent

active

052871908

ABSTRACT:
A television power switch for preventing a picture transient phenomenon that is normally produced when the power to the television set is turned OFF. A microcomputer is used to generate a predetermined control signal when a user operates the power switch button. A power input/output section supplies and cuts off an AC power source in response to the control signal from the microcomputer. A mode selecting section converts the mode of a chroma IC between an OSD signal mode and a TV signal mode in response to the operating state of the power input/output section. The chroma IC enters the OSD signal mode when power is turned off, thereby preventing the picture transient phenomenon to be produced.

REFERENCES:
patent: 4723167 (1988-02-01), Griffey
patent: 4820959 (1989-04-01), Griffey
patent: 5184225 (1993-02-01), Heidebroek et al.

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