Illumination device having a plurality of different colored LEDs coupled to a solid waveguide
US11067734B2 · kind B2 · utility
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12References
20Claims
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Key dates
| Filing date | Nov 15, 2019 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Nov 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device includes a solid waveguide; a plurality of light emitting diodes emitting light of different colors and arranged to project light into at least one of the surfaces of the waveguide; and one or more phosphor materials for converting light emitted by one of the LEDs from one color to another, such that an out-coupling region of the waveguide outputs a mixture of light from at least some of the LEDs and light converted by the phosphors materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.