Preferred lighting spectrum and color shifting circadian lamps
US11382192B2 · kind B2 · utility
0Cited by
14References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2020 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Jun 13, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimmable circadian lighting system is provided that includes a light source and a control circuit in electrical communication with the light source and a dimmer. The control circuit is operative to vary a corelated color temperature (CCT) of the light source based on a signal from the dimmer; and maintain approximately a same lumen output of the light source across an upper transition zone of the dimmer extending from about 70% or greater of a range of the dimmer to about 100% of the range of the dimmer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.