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    Wavelength converting member and light emitting device
    3.
    发明授权
    Wavelength converting member and light emitting device 有权

    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.

    Wavelength converting member and light emitting device
    4.
    发明授权
    Wavelength converting member and light emitting device 有权

    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.

    Method for producing beta-sialon fluorescent material
    5.
    发明授权
    Method for producing beta-sialon fluorescent material 有权

    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.

    Method for producing β-sialon fluorescent material
    7.
    发明授权
    Method for producing β-sialon fluorescent material 有权

    公开(公告)号：US11427758B2

    公开(公告)日：2022-08-30

    申请号：US16504937

    申请日：2019-07-08

    Applicant: NICHIA CORPORATION

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

    IPC: C09K11/77 ,  C09K11/08

    Abstract: A method for producing β-sialon fluorescent material having excellent emission intensity is provided. The method for producing β-sialon fluorescent material includes providing a composition comprising silicon nitride that contains aluminium, an oxygen atom, and europium, heat treating the composition, contacting the heat-treated composition with a basic substance, and washing the composition, which has been contacted with the basic substance, with an acidic liquid medium.

    Method of producing β-sialon fluorescent material
    8.
    发明授权
    Method of producing β-sialon fluorescent material 有权

    公开(公告)号：US11512250B2

    公开(公告)日：2022-11-29

    申请号：US17120662

    申请日：2020-12-14

    Applicant: NICHIA CORPORATION

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

    IPC: C09K11/77 ,  C09K11/08

    Abstract: Provided is a method of producing a β-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of β-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.

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