Apparatus for controlling the operation of a television accordin

Details Apparatus for controlling the operation of a television accordin Apparatus for controlling the operation of a television accordin

1989-09-08

1992-04-28

Envall, Jr., Roy N.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358181, 3581941, 360 79, H04N 5782

Patent

active

051092840

ABSTRACT:
The present invention is to provide an apparatus for turning on/off a TV and switching the input source thereof by means of a Video Cassette Recorder (VCR) without separately turning on/off the TV and VCR when playing the VCR. The TV control signal generated by a first microcomputer of the VCR is combined with the audio signal of the VCR by an adder, from which a combined signal is transmitted through an audio line to the external input terminal. In the TV, the combined signal is low-pass-filtered to detect the audio signal, while being high-pass-filtered to detect the TV control signal applied to a microcomputer of the TV to turn on the TV or switch the input source thereof.

REFERENCES:
patent: 4392022 (1983-07-01), Carlson
patent: 4626848 (1986-12-01), Ehlers
patent: 4633514 (1986-12-01), Fimoff et al.
patent: 4771283 (1988-09-01), Imoto
patent: 4860202 (1989-08-01), Jones
KS5803A/KS5803B CMOS Integrated Circuit; Samsung; Linear IC Data Book vol. 1, pp. 527-533, 1988.

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