{
  "$type": "site.standard.document",
  "description": "An electronic key device includes a portable device (3)capable of being carried by a user, and a vehicle-mounted device (2) configured to perform mutual communication with the portable device (3). The vehicle-mounted device (2) includes a plurality of antennas (ANT1, ANT2, ANT3) that is provided in…",
  "path": "/patents/947326",
  "publishedAt": "2016-01-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R25/245",
    "ALPS ELECTRIC CO LTD [JP]"
  ],
  "textContent": "An electronic key device includes a portable device (3)capable of being carried by a user, and a vehicle-mounted device (2) configured to perform mutual communication with the portable device (3). The vehicle-mounted device (2) includes a plurality of antennas (ANT1, ANT2, ANT3) that is provided in different positions of a vehicle and is configured to transmit radio waves every predetermined time. A response signal based on the reception strength of the radio waves transmitted from the plurality of antennas is transmitted from the portable device (3) to the vehicle-mounted device (2). The vehicle-mounted device (2) determines that a moving direction of the portable device (3) heads for any one of the antennas based on the response signal, and when it is determined that a distance between the vehicle (1) and the portable device (3) is equal to or less than a predetermined threshold, control is performed such that a door (1a, 1b) becomes unlocked.",
  "title": "ELECTRONIC KEY DEVICE"
}