Invention Grant
- Patent Title: Semiconductor light emitting devices including multiple red phosphors that exhibit good color rendering properties with increased brightness
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Application No.: US14471697Application Date: 2014-08-28
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Publication No.: US10074781B2Publication Date: 2018-09-11
- Inventor: Robert Wilcox , Brian Thomas Collins
- Applicant: Cree, Inc.
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Agency: Myers Bigel, P.A.
- Main IPC: H05B33/14
- IPC: H05B33/14 ; H01L51/54 ; H01L33/50 ; C09K11/08 ; C09K11/77

Abstract:
A light emitting device includes a light emitting diode chip (“LED”) that emits light having a dominant wavelength in the blue color range and a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED. The recipient luminophoric medium includes a green phosphor, a yellow phosphor, a first red phosphor having a first dominant wavelength and a second red phosphor having a second dominant wavelength that is different from the first dominant wavelength.
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