White light source
US10534123B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2015 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Jul 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0063
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A white light source includes an array of light emitting elements arranged to a light guide.A light in-coupling array is arranged so that each light emitting element faces a light in-coupling element to incouple in the light guide a portion of the divergent light beams so that the in-coupled angle of at least a part of the light rays of the in-coupled light beam is higher than 45°.An array of light homogenizing elements is arranged so that each light homogenizing element faces a light incoupling element and so that the deflection angle of at least a fraction of the incident part of the in-coupled light beam incident on each of said homogenizing elements is higher than 45°.The white light source provides a uniform outcoupled white light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.