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    FLUORIDE FLUORESCENT BODY, METHOD FOR PRODUCING SAME, AND LIGHT EMISSION APPARATUS
    1.
    发明公开
    FLUORIDE FLUORESCENT BODY, METHOD FOR PRODUCING SAME, AND LIGHT EMISSION APPARATUS 审中-公开

    公开(公告)号：US20240279543A1

    公开(公告)日：2024-08-22

    申请号：US18258737

    申请日：2021-12-09

    申请人： NICHIA CORPORATION

    发明人： Tomokazu YOSHIDA

    IPC分类号： C09K11/64

    CPC分类号： C09K11/645

    摘要： Provided is a red light emitting phosphor having a high luminance. The fluoride phosphor has a first composition which includes an alkali metal containing K, Si, Al, Mn, and F. In the first composition, when a total number of moles of the alkali metal is 2: a total number of moles of Si, Al, and Mn is 0.9 to or more and 1.1 or less; a number of moles of Al is more than 0 but and 0.1 or less; a number of moles of Mn is more than 0 but and 0.2 or less; and the a number of moles of F is 5.9 to 6.1. The fluoride phosphor has a crystal structure of cubic system, and a lattice constant of not less than 0.8138 nm.

    METHOD FOR PRODUCING PHOSPHOR AND PHOSPHOR
    5.
    发明公开
    METHOD FOR PRODUCING PHOSPHOR AND PHOSPHOR 审中-公开

    公开(公告)号：US20240101895A1

    公开(公告)日：2024-03-28

    申请号：US18275606

    申请日：2022-01-26

    申请人： Sumitomo Chemical Company, Limited

    发明人： Masaki KANNAMI ,  Takashi ARIMURA ,  Shota NAITO ,  Kentaro IWASAKI ,  Shinichi SASAKI

    IPC分类号： C09K11/64

    CPC分类号： C09K11/647

    摘要： A method for producing a phosphor having a core-shell structure that includes: a core part formed of a crystal phase of an inorganic compound containing a metal element M constituting a luminescent center ion and aluminum; and a shell part containing at least one element selected from the group consisting of boron and silicon and formed on at least a portion of a surface of the core part, the method including: mixing a raw material of the crystal phase and a raw material of the shell part; and heating the obtained mixture at a temperature at which the raw material of the shell part is liquefied, but a host crystal of a phosphor to be obtained is maintained, in which the raw material of the crystal phase contains a raw material compound having D50 in a particle diameter distribution of 0.2 to 90 μm and containing aluminum.

    PHOSPHOR
    6.
    发明公开
    PHOSPHOR 审中-公开

    公开(公告)号：US20230407170A1

    公开(公告)日：2023-12-21

    申请号：US18036286

    申请日：2021-10-27

    申请人： Sumitomo Chemical Company, Limited

    发明人： Shota NAITO ,  Masaki KANNAMI ,  Kentaro IWASAKI

    IPC分类号： C09K11/64

    CPC分类号： C09K11/643 ,  G03B21/204

    摘要： A phosphor having an elemental composition represented by the following composition formula: SryMg(1−x)MxAlzO(1+y+1.5z) (1), in the formula (1), M represents at least one metal element selected from the group consisting of manganese, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, thulium, and ytterbium, x represents a value of 0.01≤x≤0.8, y represents a value of 1≤y≤2, and z represents a value of 10≤z≤22, wherein a particle diameter D10 at which a cumulative frequency is 10% and a particle diameter D90 at which a cumulative frequency is 90% in a volume-based cumulative particle diameter distribution curve obtained by a laser diffraction scattering method satisfy the following conditions (I) and (II): (I) D90-D10 is less than 67.4 μm; and (II) D10 is a value of greater than 1.3 μm and 100 μm or less.

    LIGHT EMITTING DEVICE
    8.
    发明公开
    LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20230369547A1

    公开(公告)日：2023-11-16

    申请号：US18245334

    申请日：2021-08-20

    申请人： NICHIA CORPORATION

    发明人： Makoto NAKANO ,  Atsushi BANDO

    IPC分类号： H01L33/50 ,  C09K11/64 ,  C09K11/08

    CPC分类号： H01L33/504 ,  C09K11/646 ,  C09K11/643 ,  C09K11/0855

    摘要： A light emitting device includes a light emitting element, and a fluorescent member including a phosphor. The light emitting device satisfies any of Condition (A): a correlated color temperature of light emission of the light emitting device is within a range of 4500 K or more and 7500 K or less, a content of a first phosphor is within a range of 29 mass % or more and 90 mass % or less, and a melanopic ratio is within a range of 1.0 or more and 1.4 or less; Condition (B): a correlated color temperature of light emission of the light emitting device is within a range of 2500 K or more and less than 4500 K, a content of a first phosphor is within a range of 25 mass % or more and 90 mass % or less, and a melanopic ratio is within a range of 0.7 or more and 1.1 or less; and Condition (C): a correlated color temperature of light emission of the light emitting device is within a range of 2500 K or more and 3000 K or less, a content of a first phosphor is within a range of 20 mass % or more and 90 mass % or less, and a melanopic ratio is within a range of 0.48 or more and 1.10 or less.