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

Claim 19:
20. 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 Correlated Color Temperature in a range from about 2200K to about 6500K, a luminance, a general CRI Ra of at least 90, and a spectrum, which over a wavelength range from about 500 nm to about 600 nm, a maximum deviation between the intensity of light emitted by the device compared with the intensity of light of the spectrum of a black-body or standard illuminant having the same Correlated Color Temperature and luminance is less than 0.3; and the device has a luminous efficacy of at least 330 lm/Wopt.