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    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL
    31.
    发明申请
    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20200270519A1

    公开(公告)日：2020-08-27

    申请号：US16801626

    申请日：2020-02-26

    Applicant: NICHIA CORPORATION

    Inventor： Takayuki SHINOHARA ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  C09K11/08

    Abstract: Provided is a method for producing a nitride fluorescent material including: preparing a raw material mixture including a hydride containing at least one first alkaline earth metal element, at least one compound containing at least one second alkaline earth metal element and selected from an amide compound and an imide compound, a compound containing europium, a compound containing aluminum, and a compound containing silicon, wherein at least one of the compound containing europium, the compound containing aluminum, and the compound containing silicon is a nitride; and subjecting the raw material mixture to a heat treatment to obtain the nitride fluorescent material.

    WAVELENGTH CONVERTING MEMBER AND LIGHT EMITTING DEVICE
    33.
    发明申请
    WAVELENGTH CONVERTING MEMBER AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20190305193A1

    公开(公告)日：2019-10-03

    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 ,  C09K11/08 ,  C09K11/77

    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.

    LIGHT-EMITTING DEVICE
    35.
    发明申请
    LIGHT-EMITTING DEVICE 审中-公开

    公开(公告)号：US20190109266A1

    公开(公告)日：2019-04-11

    申请号：US16201141

    申请日：2018-11-27

    Applicant: NICHIA CORPORATION

    Inventor： Shoji HOSOKAWA ,  Kazuya NISHIMATA ,  Tomokazu YOSHIDA

    IPC: H01L33/50 ,  G02F1/13357 ,  C09K11/64 ,  C09K11/77 ,  C09K11/08

    Abstract: Provided is a light-emitting device including a light-emitting element having a peak emission wavelength in a range of from 400 nm to 470 nm, and a fluorescent member including a first fluorescent material including an aluminate that contains Mg, Mn, and at least one alkali earth metal selected from the group consisting of Ba, Sr, and Ca, a second fluorescent material having a different composition from the first fluorescent material, and a third fluorescent material. The first, second and third fluorescent materials have a peak emission wavelength in a range of from 510 nm to 525 nm, from 510 nm to 550 nm, and from 620 nm to 670 nm, respectively.

    LIGHT EMITTING DEVICE
    37.
    发明申请
    LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20180090647A1

    公开(公告)日：2018-03-29

    申请号：US15715841

    申请日：2017-09-26

    Applicant: NICHIA CORPORATION

    Inventor： Shoji HOSOKAWA ,  Kazuya NISHIMATA ,  Tomokazu YOSHIDA

    IPC: H01L33/50 ,  G02F1/1335

    CPC classification number: H01L33/504 ,  G02F1/133603 ,  H01L33/502

    Abstract: Provided is a light emitting device capable of realizing color reproducibility in a broad range. The light emitting device contains a light emitting element having an emission peak wavelength in a range of 430 nm or more and 470 nm or less, a first fluorescent material having a composition represented by formula (I), which has an emission peak wavelength in a range of 510 nm or more and 525 nm or less and has an average particle diameter that is 10.0 μm or more and 30.0 μm or less, and a second fluorescent material having an emission peak wavelength in a range of 620 nm or more and 670 nm or less: X1aMgbMncAldOa+b+c+1.5d  (I) wherein X1 represents at least one element selected from the group consisting of Ba, Sr and Ca, and a, b, c and d satisfy 0.5≦a≦1.0, 0.0≦b≦0.7, 0.3≦c≦0.7, and 8.5≦d≦13.0.

    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL, AND NITRIDE FLUORESCENT MATERIAL
    38.
    发明申请
    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL, AND NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20180086977A1

    公开(公告)日：2018-03-29

    申请号：US15717232

    申请日：2017-09-27

    Applicant: NICHIA CORPORATION

    Inventor： Shoji HOSOKAWA ,  Daiki KURAMOTO

    IPC: C09K11/77 ,  C09K11/08

    CPC classification number: C09K11/7734 ,  C09K11/0883

    Abstract: A method of producing a nitride fluorescent material including a step of first heat-treating a first compound containing at least one alkaline earth metal element selected from the group consisting of Ba, Sr, Ca and Mg, a second compound containing at least one element selected from the group consisting of Eu, Ce, Tb and Mn, and a Si-containing compound, in an atmosphere containing nitrogen to obtain a calcined product of raw materials, and a step of second heat-treating the calcined product of raw materials, a Ba-containing compound, a Si-containing compound, and optionally a third compound containing at least one element selected from the group consisting of Eu, Ce, Tb and Mn, and optionally a fourth compound containing at least one alkaline earth metal element selected from the group consisting of Sr, Ca and Mg, in an atmosphere containing nitrogen to obtain a nitride fluorescent material is provided, wherein the ratio of the charge-in molar amount of Ba to the total charge-in molar amount of at least one alkaline earth metal element to be contained in the calcined product of raw materials in the step of obtaining the calcined product of raw materials is smaller than the ratio of the charge-in molar amount of Ba to the total charge-in molar amount of at least one alkaline earth metal element to be contained in the nitride fluorescent material in the step of obtaining the nitride fluorescent material.

    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL
    39.
    发明申请
    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20180002600A1

    公开(公告)日：2018-01-04

    申请号：US15635751

    申请日：2017-06-28

    Applicant: NICHIA CORPORATION

    Inventor： Shoji HOSOKAWA ,  Daiki KURAMOTO

    IPC: C09K11/77 ,  C09K11/08

    CPC classification number: C09K11/7734 ,  C09K11/0883

    Abstract: A method of producing a nitride fluorescent material having relatively high light emission intensity is provided. The method of producing a nitride fluorescent material includes preparing a calcined product having a composition containing at least one first element selected from the group consisting of Ba, Sr, Ca, and Mg, at least one second element selected from the group consisting of Eu, Ce, Tb, and Mn, and Si and N, and bringing the calcined product into contact with a fluorine-containing substance at a temperature in a range of −20° C. or higher and lower than 150° C.

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