Backlight unit including input coupler, holographic display apparatus including the backlight unit, and method of manufacturing the input coupler
US10620357B2 · kind B2 · utility
0Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2018 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Jul 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight unit including an input coupler, a holographic display apparatus including the backlight unit, and a method of manufacturing the input coupler are provided. The backlight unit includes the input coupler configured to cause light incident on a light incident surface of a light guide plate to travel into the light guide plate, the input coupler has a binary grating structure in which a plurality of barriers are arranged parallel to one another at a constant grating period, and the plurality of barriers are tilted from the light incident on the light incident surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.