US Patent No. 10,113,700
LIGHTING SYSTEM HAVING REDUCED MELANOPIC SPECTRAL CONTENT
| Patent No. | 10,113,700 |
|---|---|
| Issue Date | October 30, 2018 |
| Title | Lighting System Having Reduced Melanopic Spectral Content |
| Inventorship | Wouter A. Soer, Palo Alto, CA (US) Oleg B. Shchekin, San Francisco, CA (US) Hans-Helmut Bechtel, Aachen (DE) |
| Assignee | LUMILEDS LLC, San Jose, CA (US) |
Claim of US Patent No. 10,113,700
1. A light-emitting device configured to provide white light with a cyan gap coinciding with a melanopic sensitivity range, the light-emitting device comprising:a light source configured to provide violet or blue light with a peak wavelength under 450 nanometers (nm); and
at least one down-converter coupled to and located downstream of the light source and configured with a long-wavelength onset to convert a spectrum of the violet or blue light to generate the white light with a correlated color temperature (CCT) greater than or equal to 2700 Kelvin (K) and with a spectral power content in a 447-531 nm wavelength range that is less than or equal to 10% of a total spectral power content in a 380-780 nm wavelength range.
at least one down-converter coupled to and located downstream of the light source and configured with a long-wavelength onset to convert a spectrum of the violet or blue light to generate the white light with a correlated color temperature (CCT) greater than or equal to 2700 Kelvin (K) and with a spectral power content in a 447-531 nm wavelength range that is less than or equal to 10% of a total spectral power content in a 380-780 nm wavelength range.