Patent ID: 11901492
Assignee: INTEMATIX CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 16:
17. A light emitting device comprising:
a solid-state light emitter with a wavelength from 440 nm to 470 nm;
a cerium-activated garnet phosphor;
a broadband europium-activated nitride orange to red phosphor of general composition CaAlSiN3:Eu; and
a narrowband manganese-activated fluoride red phosphor selected from the group consisting of: K2SiF6:Mn4+, K2GeF6:Mn4+, and K2TiF6:Mn4+;
wherein:
in response to a voltage, the device generates light comprising a color temperature in a range from about 2200K to about 6500K, a general CRI Ra of at least 90, and a spectrum having a maximum intensity in a range from 530 nm to 600 nm; wherein the maximum intensity is in a range from about 580 nm to 600 nm when the color temperature is in a range from about 2200K to about 3000K;
the maximum intensity is in a range from about 570 nm to 580 nm when the color temperature is in a range from about 3000K to 4000K;
the maximum intensity is in a range from about 550 nm to 570 nm when the color temperature is in a range from about 4000K to 5000K;
the maximum intensity is in a range from about 530 nm to 550 nm when the color temperature is a range from about 5000K to 6500K; and
wherein the device has a luminous efficacy of at least 330 lm/Wopt.