{
  "$type": "site.standard.document",
  "description": "A head-up display apparatus (10) projects a virtual image to be perceived by a user onto a virtual image display part provided in front of the user. The head-up display apparatus (10) includes a display light emitting unit (110) and a display light reflection unit (120). The display light emitting…",
  "path": "/patents/1398405",
  "publishedAt": "2025-05-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K35/28",
    "JVCKENWOOD CORP [JP]"
  ],
  "textContent": "A head-up display apparatus (10) projects a virtual image to be perceived by a user onto a virtual image display part provided in front of the user. The head-up display apparatus (10) includes a display light emitting unit (110) and a display light reflection unit (120). The display light emitting unit (110) emits display light. The display light reflection unit (120) reflects the display light and emits the reflected display light. The display light reflection unit (120) includes a mirror part (121) having a concave shape and a transmissive-type volume hologram part (122) provided on a surface of the mirror part.",
  "title": "HEAD-UP DISPLAY DEVICE"
}