Tunable lighting system with preferred color rendering
US11289630B2 · kind B2 · utility
1Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2019 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Mar 11, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Light emitting devices having a first LED with a first phosphor, a second LED with a second phosphor and a third LED with a third phosphor to emit a composite white light are described. The first LED and first phosphor emit the red spectral component, the second LED and the second phosphor emit the blue spectral component and the third LED and third phosphor emit the green spectral component of the composite white light. The green spectral component has at least 30% radiant flux in a deep red spectral wavelength region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.