{
  "$type": "site.standard.document",
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  "description": "A display apparatus of the present technique includes a display unit configured to project an image onto a light transmissive display member, and forms a virtual image, of the image projected by the display unit, on an opposite side of the display member to a user. The display unit is configured…",
  "path": "/patents/935480",
  "publishedAt": "2016-11-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K35/22",
    "PANASONIC IP MAN CO LTD [JP]"
  ],
  "textContent": "A display apparatus of the present technique includes a display unit configured to project an image onto a light transmissive display member, and forms a virtual image, of the image projected by the display unit, on an opposite side of the display member to a user. The display unit is configured such that a display device for displaying an image and a projection optical system for projecting the image displayed on the display device onto the display member are housed in a housing having an opening through which projection light is emitted. The projection optical system includes, on an optical path from the display device to the opening, a first reflection member disposed on a display device side and a second reflection member disposed on an opening side. The first reflection member has a reflection surface which reflects the image displayed on the display device and has a convex shape, and the second reflection member has a reflection surface which projects the image onto the display member and has a free curved concave shape. Further, a relationship between vertical length Yv of the image displayed on the display device and distance T, on a central optical path, from the user to the virtual image satisfies 0.03 < (TxLv)/Yv < 0.22, where Lv is a vertical length of the virtual image of the image.",
  "title": "DISPLAY EQUIPMENT AND DISPLAY UNIT"
}