Automobile electronic light-activated key device

Details Automobile electronic light-activated key device Automobile electronic light-activated key device

1988-10-27

1990-05-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

341 31, G01V 904

Patent

active

049220942

ABSTRACT:
An automobile electronic key device for externally and keylessly unlocking the vehicle door lock is disclosed. The electronic key device provided near the inner side of the vehicle lateral window glass includes plural pairs of light emitting and receiving elements, to which predetermined AC signals are supplied from the light emission controlling circuit. External manual stroking operation on said light emitting-receiving elements generates ID signals, which are supplied to the received light processing circuit, which synchronously processes the inputted ID signal with said AC signal. The unlocking device functions to compare the ID signal to the registered member and unlocks the vehicle door lock upon identifying them.

REFERENCES:
patent: 3340401 (1967-09-01), Young
patent: 3885408 (1975-05-01), Clark
patent: 4254333 (1981-03-01), Bergstrom
patent: 4340813 (1982-07-01), Sauer

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