Illumination device having a plurality of different colored LEDs coupled to solid wedge-shaped waveguides
US11397291B2 · kind B2 · utility
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39Claims
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Key dates
| Filing date | Mar 30, 2021 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Mar 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device includes first and second solid, wedge-shaped waveguides and first and second light-emitting diodes (LEDs) positioned to couple light into the waveguides. Mixed light is emitted from (i) at least a portion of the first surface of the first waveguide and/or (ii) at least a portion of the first surface of the second waveguide, the mixed light including light emitted by the first LED and light emitted by the second LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.