Membrane switch having a rotary motion detection function

Details Membrane switch having a rotary motion detection function Membrane switch having a rotary motion detection function

1993-09-14

1996-04-16

Peng, John K.

Coded data generation or conversion

Code generator or transmitter

Transmitter for remote control signal

200 14, 341 20, 341 22, 341 23, 341 35, 341190, G08C 1912

Patent

active

055087035

ABSTRACT:
A membrane switch having a rotary motion detection function comprises a flexible sheet, in which movable electrodes are formed that correspond to multiple keys, and a printed wiring board, in which fixed electrodes are formed that correspond to the movable electrodes. The flexible sheet and printed wiring board are arranged in layers so that the movable and fixed electrodes face each other with a prescribed spacing between them. When any key on the membrane switch is pressed and thus turned on, that key's signal is detected. When multiple keys are turned on in succession within a prescribed time interval, codes are sent that correspond to the direction and speed of movement of the sequence of turned-on keys. The rotary motion keys are arranged in a circle. The codes that correspond to the direction and speed of shift of the turned-on keys are preset in a microprocessor. The rotary motion keys can be arranged on the same board with other general keys to make up a remote control device.

REFERENCES:
patent: 3898421 (1975-08-01), Suzumura
patent: 4221975 (1980-09-01), Ledniczki et al.
patent: 4246452 (1981-01-01), Chandler
patent: 4963876 (1990-10-01), Sanders et al.
patent: 5119078 (1992-06-01), Grant

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