Method of operating a semiconductor light source, and semiconductor light source
US10638578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Feb 7, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating a semiconductor light source, wherein the semiconductor light source includes at least one first light source that generates blue light; at least one second light source that generates bluish-white light; at least one third light source that produces greenish-white light; at least one fourth light source that generates red light, wherein no further light sources are present, the light sources can be controlled independently of one another, the light sources are operated in a continuous wave mode and not by pulse width modulation, and the semiconductor light source is operated such that all in all white mixed light having a tunable correlated color temperature is generated, and each of the light sources is operated exclusively with at least 5% of an intended maximum current in the switched-on state of the semiconductor light source so that an undercurrent operation of the light sources is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.