公开(公告)号：US10833230B2

公开(公告)日：2020-11-10

申请号：US16793018

申请日：2020-02-18

Applicant: NICHIA CORPORATION

Inventor： Kenichi Aoyagi ,  Takashi Kaide ,  Takuya Nakabayashi ,  Tetsuya Ishikawa ,  Shoji Hosokawa

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.

公开(公告)号：US10608149B2

公开(公告)日：2020-03-31

申请号：US16369046

申请日：2019-03-29

Applicant: NICHIA CORPORATION

Inventor： Kenichi Aoyagi ,  Takashi Kaide ,  Takuya Nakabayashi ,  Tetsuya Ishikawa ,  Shoji Hosokawa

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.

公开(公告)号：US10316249B2

公开(公告)日：2019-06-11

申请号：US15165580

申请日：2016-05-26

Applicant: NICHIA CORPORATION

Inventor： Motoharu Morikawa ,  Kenichi Aoyagi ,  Takashi Kaide ,  Shoji Hosokawa

IPC: C09K11/77

Abstract: A method for producing a β-sialon fluorescent material superior in light emitting luminance is provided. The method includes heat-treating a first mixture containing an aluminum compound, a europium compound, and a first silicon oxynitride compound to obtain a first heat-treated product, and heat-treating a second mixture containing the first heat-treated product, an aluminum compound, a europium compound, and a second silicon oxynitride compound, which has a larger oxygen content than the first silicon oxynitride compound, to obtain a second heat-treated product.

公开(公告)号：US10190044B2

公开(公告)日：2019-01-29

申请号：US15228109

申请日：2016-08-04

Applicant: NICHIA CORPORATION

Inventor： Shoji Hosokawa ,  Motoharu Morikawa ,  Tadayoshi Yanagihara ,  Kenichi Aoyagi ,  Takashi Kaide

IPC: C09K11/08 ,  C09K11/77

Abstract: A method for producing a β-sialon fluorescent material can be provided. The method includes preparing a composition containing silicon nitride that contains aluminium, an oxygen atom, and europium, heat-treating the composition in a rare gas atmosphere or in a vacuum, and contacting the heat-treated composition with a gas containing elemental fluorine.