Homogeneous color LED lighting device with wavelength dependent modifier on output surface of lightguide
US11947151B2 · kind B2 · utility
0Cited by
4References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 8, 2021 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Apr 8, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133609
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device includes a light guide having a light output surface, one or more LED packages having two or more spatially separated LED chips, and two or more wavelength dependent modification features located on the output surface of the light guide. Each wavelength dependent modification features is configured to modify the intensity of light from one or more of the LED chips to provide homogeneous colored light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.