公开(公告)号：US20220389313A1

公开(公告)日：2022-12-08

申请号：US17805458

申请日：2022-06-04

Applicant: Intematix Corporation

Inventor： Gang WANG ,  Yi-Qun LI

IPC: C09K11/61 ,  H01L33/26 ,  H01L33/08 ,  C09K11/77 ,  C09K11/64

Abstract: A white light emitting device comprises: an LED that generates excitation light of wavelength from 420 nm to 480 nm; and photoluminescence materials that generate light with a peak emission wavelength from 500 nm to 650 nm comprising a broadband phosphor, and a manganese-activated narrowband red fluoride phosphor with a peak emission wavelength from 628 nm to 640 nm and a full width at half maximum of less than 30 nm. The device generates white light with a selected color temperature from 2200K to 6500K, a General Color Rendering Index, CRI Ra, of at least 80, and a Duv (Delta u, v) from 0.0060 to 0.0170 for the selected color temperature and wherein the device has an LER (Luminous Efficacy of Radiation) of at least 320 lm/Wopt.