US Patent No. 10,716,182

METHODS OF PROVIDING TUNABLE WARM WHITE LIGHT


Patent No. 10,716,182
Issue Date July 14, 2020
Title Methods Of Providing Tunable Warm White Light
Inventorship Raghuram L. V. Petluri, Los Angeles, CA (US)
Paul Kenneth Pickard, Los Angeles, CA (US)
Assignee Ecosense Lighting Inc., Los Angeles, CA (US)

Claim of US Patent No. 10,716,182

1. A method of generating white light, the method comprising:passing light produced by each of a first, second, and third LED strings through one of a plurality of respective luminophoric mediums to produce a first unsaturated light, a second unsaturated light, and a third unsaturated light, respectively;
combining the first unsaturated light, the second unsaturated light, and the third unsaturated light together into a fourth unsaturated light;
producing the fourth unsaturated light output which corresponds to at least one of a plurality of points along a predefined path near a black body locus in the 1931 CIE Chromaticity Diagram within a 7-step MacAdam ellipse around any point on the black body locus having a correlated color temperature between about 1800K and about 3200K; and,
wherein the second unsaturated light has spectral power distribution including at least spectral power intensities of 1.4% and 12.2% for wavelengths between 501-540 nm, between 8.7% and 24.7% for wavelengths between 541-580 nm, between 48.5% and 102.8% for wavelengths between 581-620 nm, between 1.8% and 74.3% for wavelengths between 661-700 nm, between 0.5% and 29.5% for wavelengths between 701-740 nm, and between 0.3% and 9% for wavelengths between 741-780 nm, relative to a normalized range for wavelengths between 621-660 nm with a value of 100.0%.