Invention Grant
- Patent Title: Wavelength converting member and light emitting device
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Application No.: US16369046Application Date: 2019-03-29
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Publication No.: US10608149B2Publication Date: 2020-03-31
- Inventor: Kenichi Aoyagi , Takashi Kaide , Takuya Nakabayashi , Tetsuya Ishikawa , Shoji Hosokawa
- Applicant: NICHIA CORPORATION
- Applicant Address: JP Anan-shi
- Assignee: NICHIA CORPORATION
- Current Assignee: NICHIA CORPORATION
- Current Assignee Address: JP Anan-shi
- Agency: Hunton Andrews Kurth LLP
- Priority: JP2018-069611 20180330; JP2019-057122 20190325
- Main IPC: H01L33/50
- IPC: H01L33/50 ; C09K11/77 ; C09K11/08

Abstract:
A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 μm or more and 30 μm or less, wherein the second fluorescent material comprises a β-SiAlON fluorescent material, the circularity of the β-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the β-SiAlON fluorescent material is in a range of 2 μm or more and 30 μm or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 μm or more and 200 μm or less.
Public/Granted literature
- US20190305193A1 WAVELENGTH CONVERTING MEMBER AND LIGHT EMITTING DEVICE Public/Granted day:2019-10-03
Information query
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