- 专利标题: Light emitting device
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申请号: US17929870申请日: 2022-09-06
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公开(公告)号: US11990571B2公开(公告)日: 2024-05-21
- 发明人: Makiko Iwasa , Kazushige Fujio
- 申请人: NICHIA CORPORATION
- 申请人地址: JP Anan
- 专利权人: NICHIA CORPORATION
- 当前专利权人: NICHIA CORPORATION
- 当前专利权人地址: JP Anan
- 代理机构: Hunton Andrews Kurth LLP
- 优先权: JP 18105560 2018.05.31 JP 19095441 2019.05.21
- 主分类号: H01L33/50
- IPC分类号: H01L33/50 ; A61L2/08 ; H01L33/56 ; H01L33/60 ; H01L33/32 ; H01L33/48 ; H01L33/62
摘要:
A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one fluorescent material that is excited by light from the light emitting element for light emission, wherein a mixture of light from the light emitting element and light from the fluorescent material has a correlated color temperature in a range of 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.
公开/授权文献
- US20230019657A1 LIGHT EMITTING DEVICE 公开/授权日:2023-01-19
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