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

Claim 0:
1. 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 first maximum intensity at a wavelength in a range from 530 nm to 600 nm and a second maximum intensity at a wavelength in a range from 625 nm to 635 nm, wherein a ratio of the first maximum intensity to the second maximum intensity is about 20% to about 50%; and
wherein said light comprises a color temperature in a range from about 2200K to about 6500K, a CRI Ra of at least 90, and the device has a luminous efficacy of at least 330 lm/Wopt.