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    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    1.
    发明申请
    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20200255730A1

    公开(公告)日：2020-08-13

    申请号：US16733633

    申请日：2020-01-03

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu WAKUI ,  Kazuya NISHIMATA ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  H01L33/50

    Abstract: Disclosed are a production method for a nitride fluorescent material, a nitride fluorescent material and a light emitting device. The production method is for producing a nitride fluorescent material that has, as a fluorescent material core, a calcined body having a composition containing at least one element Ma selected from the group consisting of Sr, Ca, Ba and Mg, at least one element Mb selected from the group consisting of Li, Na and K, at least one element Mc selected from the group consisting of Eu, Ce, Tb and Mn, and Al, and optionally Si, and N, and the method includes preparing a calcined body having the above-mentioned composition, bringing the calcined body into contact with a fluorine-containing substance, and subjecting it to a first heat treatment at a temperature of 100° C. or higher and 500° C. or lower to form a fluoride-containing first film on the calcined body, and forming on the calcined body, a second film that contains a metal oxide containing at least one metal element M2 selected from the group consisting of Si, Al, Ti, Zr, Sn and Zn and subjecting it to a second heat treatment at a temperature in a range of higher than 250° C. and 500° C. or lower.

    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    2.
    发明申请
    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20190062633A1

    公开(公告)日：2019-02-28

    申请号：US16117514

    申请日：2018-08-30

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu WAKUI ,  Kazuya NISHIMATA ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  H01L33/50

    CPC classification number: C09K11/7734 ,  H01L33/502 ,  H01L33/504 ,  H01L2933/0041

    Abstract: Disclosed are a production method for a nitride fluorescent material, a nitride fluorescent material and a light emitting device. The production method is for producing a nitride fluorescent material that has, as a fluorescent material core, a calcined body having a composition containing at least one element Ma selected from the group consisting of Sr, Ca, Ba and Mg, at least one element Mb selected from the group consisting of Li, Na and K, at least one element Mc selected from the group consisting of Eu, Ce, Tb and Mn, and Al, and optionally Si, and N, and the method includes preparing a calcined body having the above-mentioned composition, bringing the calcined body into contact with a fluorine-containing substance, and subjecting it to a first heat treatment at a temperature of 100° C. or higher and 500° C. or lower to form a fluoride-containing first film on the calcined body, and forming on the calcined body, a second film that contains a metal oxide containing at least one metal element M2 selected from the group consisting of Si, Al, Ti, Zr, Sn and Zn and subjecting it to a second heat treatment at a temperature in a range of higher than 250° C. and 500° C. or lower.

    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL AND NITRIDE FLUORESCENT MATERIAL
    3.
    发明公开
    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL AND NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20240209256A1

    公开(公告)日：2024-06-27

    申请号：US18394693

    申请日：2023-12-22

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu WAKUI ,  Kohei KUNIMOTO ,  Hiroyuki WATANABE ,  Eishi KANAI

    IPC: C09K11/08 ,  C09K11/77

    CPC classification number: C09K11/0883 ,  C09K11/77347

    Abstract: A method of producing a nitride fluorescent material includes preparing a calcined product including a fluorescent material core, and a first film containing fluoride on a surface of the fluorescent material core, bringing the calcined product into contact with a solution containing a metal alkoxide containing an element M2 being at least one element selected from the group consisting of Si, Al, Ti, Zr, Sn, and Zn at a temperature equal to or lower than an ambient temperature and hydrolyzing and condensation-polymerizing the metal alkoxide to form a second film containing an oxide containing the element M2, and performing a heat-treatment at a temperature higher than 250° C. and equal to or lower than 500° C. The nitride fluorescent material includes the fluorescent material core having a composition containing an element Ma being at least one element selected from the group consisting of Sr, Ca, Ba, and Mg, an element Mb being at least one element selected from the group consisting of Li, Na, and K, an element Mc being at least one element selected from the group consisting of Eu, Ce, Tb, and Mn, Al, N, and optionally Si.

    LIGHTING DEVICE AND GROWING SYSTEM
    4.
    发明申请
    LIGHTING DEVICE AND GROWING SYSTEM 有权

    公开(公告)号：US20210289711A1

    公开(公告)日：2021-09-23

    申请号：US17263608

    申请日：2019-07-26

    Applicant: NICHIA CORPORATION

    Inventor： Mika MATSUMOTO ,  Kazushige FUJIO ,  Sadakazu WAKUI ,  Tomokazu SUZUKI ,  Masato FUJIWARA ,  Munetake FUKUNAGA

    IPC: A01G7/04 ,  A01G9/20

    Abstract: An output of light suitable for growing plants is controlled using a white light source.
    A growing system including a greenhouse and a plurality of lighting devices disposed above a plant to be grown in the greenhouse and utilizing natural light includes a plurality of white light sources, a plurality of auxiliary light sources each of which is configured to emit red light and far-red light, and an illumination controller configured to control a degree of emission of light from the white light sources or the auxiliary light sources of the plurality of lighting devices, the illumination controller configured to start or stop controlling emission of light from the white light sources or the auxiliary light sources according to sunrise or sunset.

    LIGHT EMITTING DEVICE AND PLANT CULTIVATION METHOD
    5.
    发明申请
    LIGHT EMITTING DEVICE AND PLANT CULTIVATION METHOD 审中-公开

    公开(公告)号：US20200287098A1

    公开(公告)日：2020-09-10

    申请号：US16880532

    申请日：2020-05-21

    Applicant: NICHIA CORPORATION

    Inventor： Mika AMIYA ,  Kazushige FUJIO ,  Sadakazu WAKUI

    IPC: H01L33/50 ,  A01G7/04 ,  H01L25/075

    Abstract: A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm or more and 490 nm or less, and a red fluorescent material which is excited by the light from the light emitting element to emit light having at least one light emission peak wavelength in a range of 580 nm or more and 680 nm or less, wherein a ratio of the photon flux R of red light in a range of 620 nm or more and 700 nm or less to the photon flux B of blue light in a range of 400 nm or more and 490 nm or less, R/B, is in a range of more than 20 and 200 or less.

    NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    8.
    发明申请
    NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20180057739A1

    公开(公告)日：2018-03-01

    申请号：US15683262

    申请日：2017-08-22

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu WAKUI ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  C09K11/08 ,  C09K11/02 ,  H01L33/50

    CPC classification number: C09K11/7734 ,  C09K11/025 ,  C09K11/0883 ,  H01L33/502 ,  H01L33/504 ,  H01L33/507

    Abstract: A nitride fluorescent material containing at least one element selected from the group consisting of Ca, Sr, Ba and Mg, at least one element selected from the group consisting of Li, Na and K, at least one element selected from the group consisting of Eu, Ce, Tb and Mn, Al and N is provided, wherein when the maximum value of absorbance in 450 cm−1 or more and less than 900 cm−1 is taken as 1 in an FT-IR spectrum, an integrated value Z1 of a domain surrounded by a base line A connecting absorbance values at 1,200 cm−1 and 1,600 cm−1 and an absorbance spectrum of 1,200 cm−1 or more and less than 1,600 cm−1 is 4.0 or less, and/or an integrated value Z2 of a domain surrounded by a base line B connecting absorbance values at 2,700 cm−1 and 3,680 cm−1 and an absorbance spectrum of 2,700 cm−1 or more and less than 3,680 cm−1 is 5.0 or less.

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