{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreiak6ooub6cell5oygp37yenezwbpwcubeukszwcx5tcevnfiil72a"
    },
    "mimeType": "image/png",
    "size": 108199
  },
  "description": "A display apparatus for displaying a virtual image (VIMG) includes a rotating expander device (EPE) to form light beams (B,B) of output light (OUT) by expanding light beams (B,B) of input light (IN), the expander device (EPE) includes: a waveguide plate (SUB), an in-coupling element (DOE) to form…",
  "path": "/patents/1357015",
  "publishedAt": "2023-12-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G02B27/44",
    "SHENZHEN QIZE TECHNOLOGY PARTNERSHIP ( LIMITED  PARTNERSHIP)"
  ],
  "textContent": "A display apparatus for displaying a virtual image (VIMG) includes a rotating expander device (EPE) to form light beams (B,B) of output light (OUT) by expanding light beams (B,B) of input light (IN), the expander device (EPE) includes: a waveguide plate (SUB), an in-coupling element (DOE) to form first guided light (B) and second guided light (B) by coupling input light (IN) into the waveguide plate (SUB), a first out-coupling element (DOE) to form output light (OUT) by coupling the first guided light (B) out of the waveguide plate (SUB), and a second out-coupling element (DOE) to form output light (OUT) by coupling the second guided light (B) out of the waveguide plate (SUB). The in-coupling element (DOE) has a first input grating vector (V) and a second input grating vector (V), and an angle (α) between the first and second input grating vectors is between 60° and 120°.",
  "title": "DISPLAY APPARATUS FOR PROVIDING AN ENLARGED DISPLAY AREA"
}