Invention Grant
US09219202B2 Semiconductor light emitting devices including red phosphors that exhibit good color rendering properties and related red phosphors
有权
包括显示出良好显色性能的红色荧光体和相关红色荧光体的半导体发光器件
- Patent Title: Semiconductor light emitting devices including red phosphors that exhibit good color rendering properties and related red phosphors
- Patent Title (中): 包括显示出良好显色性能的红色荧光体和相关红色荧光体的半导体发光器件
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Application No.: US14255607Application Date: 2014-04-17
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Publication No.: US09219202B2Publication Date: 2015-12-22
- Inventor: Robert Wilcox , Brian 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 Sibley & Sajovec, P.A.
- Main IPC: H01L31/02
- IPC: H01L31/02 ; H01L33/50 ; C09K11/77
Abstract:
A light emitting device includes a light emitting diode (“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 that down-converts the radiation emitted by the LED to radiation having a peak wavelength that is between about 525 nanometers and about 550 nanometers, a yellow phosphor having a wavelength peak that is between about 550 nanometers and about 580 nanometers, and a red (Ca1-x-ySrxEu2+y)SiAlN3 phosphor. The (Ca1-x-ySrxEu2+y)SiAlN3 phosphor has a europium content y of between about 0.003 and 0.009 and a strontium content x of between about 0.150 and 0.300.
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Information query
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