Capacitive touch panel control

Details Capacitive touch panel control Capacitive touch panel control

1981-04-29

1983-07-19

Crosland, Donnie Lee

Communications: electrical

Audible indication

Percussion-type sound producer

340365A, 200DIG1, 361283, 4004791, G06F 302, H01G 700

Patent

active

043946437

ABSTRACT:
A capacitive touch panel control provided with first and second conductive circuit pads on opposite faces of a thin dielectric sheet in the form of a film secured to a dielectric panel by adhesive. The panel is provided with a touch pad. The circuit pads are disposed so that at least a portion of each is in appositional facial registration with the touch pad and out of appositional facial registration with each other so as to provide a variable capacitance between the circuit pads as an incident of selective touching and non-touching of the touch pad by a user. The circuit pads may form a portion of a printed circuit on the film which further includes electrical conductors for making connection to associated apparatus. Ground conductors may be provided on the film adjacent the output voltage conductors of the circuit to reduce leakage between the circuit conductors. The provision of the circuit pads on opposite faces of the film permits electrically insulated crossover of the conductors for facilitated layout of the circuit.

REFERENCES:
patent: 3921167 (1975-11-01), Fox
patent: 3974472 (1976-08-01), Gould, Jr.
patent: 4013835 (1977-03-01), Eachus et al.
patent: 4055735 (1977-10-01), Eachus et al.
patent: 4056699 (1977-11-01), Jordan
patent: 4145584 (1979-03-01), Otterlei
patent: 4161766 (1979-07-01), Castleberry et al.
patent: 4221975 (1980-09-01), Ledniczki et al.
patent: 4290052 (1981-09-01), Eichelberger et al.
patent: 4290061 (1981-09-01), Serrano
"Interchangeable Keyboard Components" IBM Technical Disclosure Bulletin, vol. 21, No. 9, Feb. 1979, pp. 3701-3702.

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