Back light unit providing direction controllable collimated light beam and 3D display using the same
US9013773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2012 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jul 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A back light unit providing a direction controllable collimated light beam and a three-dimensional display using the same is described. A back light unit comprises: a light source for generating light; and a light direction controller for converting the light from the light source into a direction controlled collimated light beam having a refraction angle, the direction controlled collimated light beam emitted to a predetermined area to generate a three-dimensional holographic image. The back light unit can provide direction controllable collimation light having uniform brightness distribution over a large diagonal area of the spatial light modulator with thin and simple structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.