- 专利标题: High Color Rendering, High Efficacy White Light Emitting Devices
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申请号: US17805458申请日: 2022-06-04
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公开(公告)号: US20220389313A1公开(公告)日: 2022-12-08
- 发明人: Gang WANG , Yi-Qun LI
- 申请人: Intematix Corporation
- 申请人地址: US CA Fremont
- 专利权人: Intematix Corporation
- 当前专利权人: Intematix Corporation
- 当前专利权人地址: US CA Fremont
- 主分类号: C09K11/61
- IPC分类号: C09K11/61 ; H01L33/26 ; H01L33/08 ; C09K11/77 ; C09K11/64
摘要:
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.
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