Lighting device
US9784418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2013 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Feb 6, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a lighting device (300) having a housing (302) and multiple light sources (308) arranged in the housing. The light sources emit light of a first wavelength range. The lighting device includes a wavelength converting member (310) arranged at a distance from the light sources, and it comprises a first wavelength converting material configured to convert a part of said light of a first wavelength range into light of a second wavelength range. The lighting device further includes a color distribution member (312) providing a color distribution of the light emitted from the lighting device where the ratio of intensity of light with the first wavelength range to the intensity of light with the second wavelength range is larger at low angles to a light output surface of the lighting device than at high angles to the light output surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.