Safe viewing distance for a television by means of an antenna in

Details Safe viewing distance for a television by means of an antenna in Safe viewing distance for a television by means of an antenna in

1992-12-09

1995-04-18

Groody, James J.

Television

Video display

Cathode-ray tube

348143, 340573, H04N 564

Patent

active

054082765

ABSTRACT:
A signal interrupt device connected externally to an electronic device such as a television set to sense when a person is within a predetermined minimum distance from the surface of the television set including a radio frequency sensor connected in series with the wire or cable providing incoming T.V. signals to the television set and a normally closed switch which is effectively opened when a person is sensed within the predetermined minimum distance, consequently interrupting the signals to the television.

REFERENCES:
patent: 4321593 (1982-05-01), Ho et al.
patent: 4417278 (1983-11-01), Hensleigh
patent: 4641191 (1987-02-01), Sutton
patent: 4716469 (1987-12-01), Kim
patent: 4831448 (1989-05-01), Park
patent: 4835614 (1989-05-01), Ryu
patent: 4843464 (1989-06-01), Choi
patent: 4853678 (1989-08-01), Bishop

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