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.