{
  "$type": "site.standard.document",
  "description": "The present application discloses a virtual image display apparatus. The virtual image display apparatus includes a gaze monitor configured to detect a gaze direction of a user and determine a gaze point based on the gaze direction; a display device configured to output an image; a projection lens…",
  "path": "/patents/1294916",
  "publishedAt": "2021-07-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G02B27/0179",
    "BOE TECHNOLOGY GROUP CO., LTD."
  ],
  "textContent": "The present application discloses a virtual image display apparatus. The virtual image display apparatus includes a gaze monitor configured to detect a gaze direction of a user and determine a gaze point based on the gaze direction; a display device configured to output an image; a projection lens configured to project the image onto a depth plane corresponding to the gaze point; and a controller configured to control a focal length of the projection lens based on a change of the gaze point.",
  "title": "VIRTUAL IMAGE DISPLAY APPARATUS, VEHICLE COMPRISING HEAD-UP DISPLAY APPARATUS COMPRISING VIRTUAL IMAGE DISPLAY APPARATUS, AND METHOD FOR VIRTUAL IMAGE DISPLAY"
}