{
  "$type": "site.standard.document",
  "description": "A vehicle alarm device () having a novel structure is provided. The vehicle alarm device () includes a sound-source detection device (), and the sound-source detection device () includes a plurality of microphones () and a delay circuit (). As a transistor included in a signal retention circuit ()…",
  "path": "/patents/1310419",
  "publishedAt": "2022-02-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60Q5/005",
    "SEMICONDUCTOR ENERGY LABORATORY CO., LTD."
  ],
  "textContent": "A vehicle alarm device () having a novel structure is provided. The vehicle alarm device () includes a sound-source detection device (), and the sound-source detection device () includes a plurality of microphones () and a delay circuit (). As a transistor included in a signal retention circuit () inside the delay circuit (), a transistor including an oxide semiconductor (OS transistor) is used. By the sound-source detection device (), an extraneous sound is obtained and the sound-source position of the extraneous sound is identified. In the case where it is judged from the relative velocity or the like between the sound source whose position has been identified and the vehicle that the sound source and the vehicle are likely to collide, an acoustic signal for calling attention of the vehicle occupant is output.",
  "title": "VEHICLE ALARM DEVICE"
}