Display apparatus
US9036117B2 · kind B2 · utility
2Cited by
2References
21Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Aug 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display apparatus is provided. The display apparatus comprises a display device for displaying an image and a diffractive optical element. The diffractive optical element is disposed on a light emitting side of the display device. The diffractive optical element comprises first grating regions. Each of the first grating regions has first diffraction gratings having a constant cycle space and the same azimuth angle. An area of the first grating regions occupies 17.5%˜94% of an area of the diffractive optical element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.