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Keyless entry device

  • US 6,075,454 A
  • Filed: 06/15/1998
  • Issued: 06/13/2000
  • Est. Priority Date: 06/24/1997
  • Status: Expired due to Term
First Claim
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1. A keyless entry device comprising a portable remote control carried by an owner of a vehicle and an onboard control module mounted on the vehicle, wherein the portable remote control transmits an operation signal when the portable remote control receives an interrogating signal from the onboard control module, and wherein the onboard control module comprises an anti-theft unit that is selectively put into a set state and a release state, a transceiver for transmitting the interrogating signal and receiving the operation signal, a signal verifier for determining whether the received operation signal is legal and for generating a reception acknowledge signal when the signal verifier determines that the received signal is legal, a proximity detector for generating a proximity signal when the portable remote control enters a predetermined range of the vehicle, a sensor unit for generating an actuation signal when the sensor unit senses a physical change in the vehicle, a door lock detector for generating a door-locked signal when the door lock detector detects a door of the vehicle locked, a door controller for locking and unlocking the door of the vehicle, and a controller for outputting a release signal to the anti-theft unit to release the anti-theft unit from the set state when the door-locked signal, the proximity signal and the reception acknowledge signal are concurrently issued with the anti-theft unit in the set state, and for outputting an unlock signal to the door controller to put the door of the vehicle into an unlocked state when the reception acknowledge signal and the sensor actuation signal are concurrently issued with the anti-theft unit in the release state.

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