Illumination device with built-in light coupler
US8061882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2009 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Apr 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12107
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention comprises devices and methods for coupling a light source to a display illumination device. In one embodiment, an illumination device includes a light guide comprising a front surface, a back surface, a light coupling section configured to receive optical energy from a light source in to the light guide through said front surface or said back surface at an angle about normal to the optical energy receiving surface, and further configured to direct light through said light guide, and a light turning section configured to redirect out of the light guide at least a portion of the light received from said light coupling section, said redirected light at an angle about normal to the optical energy receiving surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.