Display apparatus
US10663756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Apr 13, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/344
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus is disclosed. The display apparatus includes: at least one LED display unit including a plurality of LED display panels outputting image lights; a light guide unit including a plurality of in-coupling zones where the image lights are received and a single out-coupling zone to which the received image lights are guided; a plurality of in-coupling holographic optical elements (HOEs) arranged in the in-coupling zones to define the propagation path of the image lights through the light guide unit; and a plurality of out-coupling HOEs arranged in the out-coupling zone to define a path through which the image lights guided through the light guide unit are sent outside the light guide unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.