Flexible printed circuit sleep switch for electronic device

Details Flexible printed circuit sleep switch for electronic device Flexible printed circuit sleep switch for electronic device

1995-04-28

1997-02-25

Hoang, Tu B.

Electrical resistors

Flexible or folding

338211, 338212, 338196, 338198, 338 2, 338 6, G01B 716

Patent

active

056063032

ABSTRACT:
A notebook computer or other electronic device has a flexible cable interconnecting electronic circuitry in a base with electronic circuitry in a cover. A flexible potentiometer is coupled to said flexible cable in a location which bends when said cover is opened and closed with respect to the base. The resistance of the flexible potentiometer has a first value when the cover is closed and has a second value when the cover is open. A detection circuit is responsive to the resistance of the flexible potentiometer and generates an output signal which indicates whether the cover is open or closed.

REFERENCES:
patent: 2458354 (1949-01-01), De Forest
patent: 3278881 (1966-10-01), Anderson et al.
patent: 4143367 (1979-03-01), Schestag
patent: 5077551 (1991-12-01), Saitou
patent: 5086785 (1992-02-01), Gentile et al.
patent: 5280265 (1994-01-01), Kramer et al.
patent: 5309135 (1994-05-01), Langford

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