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    NITRIDE PHOSPHOR, METHOD FOR MANUFACTURING THE SAME, AND LIGHT EMITTING DEVICE
    64.
    发明申请
    NITRIDE PHOSPHOR, METHOD FOR MANUFACTURING THE SAME, AND LIGHT EMITTING DEVICE 有权

    公开(公告)号：US20220396731A1

    公开(公告)日：2022-12-15

    申请号：US17806442

    申请日：2022-06-10

    Applicant: NICHIA CORPORATION

    Inventor： Shigeyuki SUZUKI ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

    IPC: C09K11/77

    Abstract: A nitride phosphor having a composition containing Eu, Si, Al, N, and a group 2 element including at least one selected from the group consisting of Mg, Ca, Sr, and Ba. In the composition, a ratio of a total molar content of the group 2 element and Eu to a molar content of Al is 0.8 or more and 1.1 or less, a molar ratio of Eu is 0.002 or more and 0.08 or less, a molar ratio of Si is 0.8 or more and 1.2 or less, and a total molar ratio of Si and Al is 1.8 or more and 2.2 or less. The nitride phosphor has a first peak in a range of 17° 2θ or more and 19° 2θ or less and a second peak in a range of 34° 2θ or more and 35.5° 2θ or less in a CuKα powder X-ray diffraction pattern.

    LIGHT EMITTING DEVICE
    65.
    发明申请
    LIGHT EMITTING DEVICE 有权

    公开(公告)号：US20210376201A1

    公开(公告)日：2021-12-02

    申请号：US17303376

    申请日：2021-05-27

    Applicant: NICHIA CORPORATION

    Inventor： Makiko IWASA ,  Kazuya NISHIMATA ,  Atsushi YOSHINARI ,  Shoji HOSOKAWA ,  Masato OKAWA ,  Yasuaki MASHIMA

    IPC: H01L33/50 ,  F21K9/64 ,  C09K11/77

    Abstract: A light emitting device includes a light emitting element having a dominant wavelength in a range of 400 nm or more and 500 nm or less, and a wavelength conversion member that is arranged on a light emitting side of the light emitting element and includes a rare earth aluminate fluorescent material having a composition represented by the following formula (I), wherein the light emitting device emits light having a dominant wavelength in a range of 475 nm or more and 500 nm or less, and wherein the light emitting device emits light having an S/P ratio of 6.5 or less derived from the formula (1), which is the ratio of a luminous flux in scotopic vision relative to a luminous flux in photopic vision: (Lu1-p-nLnpCen)3(Al1-mGam)5kO12  (I) wherein in the formula (I), Ln represents at least one rare earth element selected from the group consisting of Y, La, Gd, and Tb, and the parameters k, m, n, and p satisfy 0.95≤k≤1.05, 0.05≤m≤0.70, 0.002≤n≤0.050, and 0≤p≤0.30, respectively.

    METHOD OF PRODUCING SILICATE FLUORESCENT MATERIAL, SILICATE FLUORESCENT MATERIAL, AND LIGHT EMITTING DEVICE
    66.
    发明申请
    METHOD OF PRODUCING SILICATE FLUORESCENT MATERIAL, SILICATE FLUORESCENT MATERIAL, AND LIGHT EMITTING DEVICE 有权

    公开(公告)号：US20210371975A1

    公开(公告)日：2021-12-02

    申请号：US17303476

    申请日：2021-05-28

    Applicant: NICHIA CORPORATION

    Inventor： Ryuta MIYAI ,  Kazuya NISHIMATA ,  Shoji HOSOKAWA

    IPC: C23C16/442 ,  C23C16/40 ,  C09K11/02 ,  C09K11/08 ,  C23C16/56

    Abstract: A method of producing a silicate fluorescent material, the method includes: providing a raw material mixture that contains an M source containing M, an Mg source, an Eu source, and an Si source, and optionally an Mn source, obtaining at least one core particle comprising a silicate fluorescent composition having a formula: (M1-cEuc)3a(Mg1-dMnd)bSi2O8, in which M is at least one element selected from the group consisting of Ca, Sr, and Ba, and a, b, c, and d are numbers respectively satisfying 0.93≤a≤1.07, 0.90≤b≤1.10, 0.016≤c≤0.090, and 0≤d≤0.22; using a chemical vapor deposition method, depositing aluminum oxide on surfaces of the at least one core particle; and heat treating at a temperature in a range of 210° C. to 490° C. in an oxygen-containing atmosphere.

    METHOD OF PRODUCING ALUMINATE FLUORESCENT MATERIAL, ALUMINATE FLUORESCENT MATERIAL, AND LIGHT EMITTING DEVICE
    67.
    发明申请
    METHOD OF PRODUCING ALUMINATE FLUORESCENT MATERIAL, ALUMINATE FLUORESCENT MATERIAL, AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20200318004A1

    公开(公告)日：2020-10-08

    申请号：US16905340

    申请日：2020-06-18

    Applicant: NICHIA CORPORATION

    Inventor： Kazuya NISHIMATA ,  Tomokazu YOSHIDA ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  C09K11/55 ,  C09K11/57 ,  C09K11/64 ,  H01L33/50

    Abstract: Disclosed are a method of producing an aluminate fluorescent material, such an aluminate fluorescent material, and a light emitting device. The aluminate fluorescent material production method includes: subjecting a first mixture prepared by mixing a compound containing at least one metal element selected from the group consisting of Ba, Sr and Ca, and at least one compound selected from the group consisting of a compound containing Mn and a compound containing Eu, and a compound containing Al, in which a compound containing Mg may be optionally mixed, to first heat treatment to give a first calcined product having an average particle diameter D1, as measured according to a Fisher Sub-Sieve Sizer method, of 6 μm or more; and subjecting a second mixture prepared by mixing a compound containing at least one metal element selected from the group consisting of Ba, Sr and Ca, at least one compound selected from the group consisting of a compound containing Mn and a compound containing Eu, and a compound containing Al, and the first calcined product whose content is 10% by mass or more and 90% by mass or less relative to the total amount of the second mixture, in which a compound containing Mg may be optionally mixed, to second heat treatment to give a second calcined product.

    ALUMINATE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    69.
    发明申请
    ALUMINATE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20190062632A1

    公开(公告)日：2019-02-28

    申请号：US16116871

    申请日：2018-08-29

    Applicant: NICHIA CORPORATION

    Inventor： Kazuya NISHIMATA ,  Tomokazu YOSHIDA ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  H01L33/50

    Abstract: Disclosed are an aluminate fluorescent material having a high light emission intensity, and a light emitting device using the same. The aluminate fluorescent material includes a composition represented by the following formula (I): X1pEutMgqMnrAlsOp+t+q+r+1.5s  (I) wherein X1 represents at least one element selected from the group consisting of Ba, Sr, and Ca; and p, q, r, s, and t each satisfy 0.5≤p≤1.0, 0≤q≤0.6, 0.4≤r≤0.7, 8.5≤s≤13.0, 0≤t≤0.3, 0.5

    LIGHT EMITTING DEVICE
    70.
    发明申请
    LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20180097153A1

    公开(公告)日：2018-04-05

    申请号：US15818740

    申请日：2017-11-21

    Applicant: NICHIA CORPORATION

    Inventor： Hiroshi IWATA ,  Shoji HOSOKAWA

    IPC: H01L33/50 ,  H01L33/60 ,  H01L33/62 ,  H01L33/56

    CPC classification number: H01L33/504 ,  H01L33/54 ,  H01L33/56 ,  H01L33/60 ,  H01L33/62 ,  H01L2224/16225 ,  H01L2933/0041 ,  H01L2933/005 ,  H01L2933/0058 ,  H01L2933/0066

    Abstract: A light emitting device includes a light emitting element and a wavelength conversion layer covering the light emitting element. The wavelength conversion layer includes first wavelength conversion particles, second wavelength conversion particles, and filling particles. The first wavelength conversion particles contains aluminum. The second wavelength conversion particles have outer surfaces covered with covering material which contains aluminum. The filling particles contain aluminum. The filling particles are provided among the first wavelength conversion particles and the second wavelength conversion particles. The filling particles have particle sizes smaller than particle sizes of the first wavelength conversion particles and particle sizes of the second wavelength conversion particles. The filling particles have aspect ratios smaller than aspect ratios of the first wavelength conversion particles and aspect ratios of the second wavelength conversion particles.

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