公开(公告)号：US11008511B2

公开(公告)日：2021-05-18

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.

公开(公告)号：US10903401B2

公开(公告)日：2021-01-26

申请号：US16296803

申请日：2019-03-08

Applicant: NICHIA CORPORATION

Inventor： Shoji Hosokawa ,  Kazuya Nishimata ,  Tomokazu Yoshida

IPC: H01L33/50 ,  G02F1/13357 ,  C09K11/77 ,  C09K11/08 ,  C09K11/64 ,  H01L33/32 ,  H01L33/48

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.

公开(公告)号：US10723945B2

公开(公告)日：2020-07-28

申请号：US15857926

申请日：2017-12-29

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.

公开(公告)号：US10196278B2

公开(公告)日：2019-02-05

申请号：US15667975

申请日：2017-08-03

Applicant: NICHIA CORPORATION

Inventor： Kazuya Nishimata ,  Shoji Hosokawa ,  Tomokazu Yoshida

IPC: C09K11/08 ,  C01G45/00 ,  C01F1/00 ,  C09K11/57 ,  C09K11/64 ,  H01L33/50 ,  H01J61/44

Abstract: Provided is an aluminate fluorescent material having a composition represented by the formula X1aMgbMncAldOa+b+c+1.5d, in which X1 is at least one element selected from the group consisting of Ba, Sr; and Ca, a, b, c, and d satisfy 0.5≤a≤1.0, 0.0≤b

公开(公告)号：US10162216B2

公开(公告)日：2018-12-25

申请号：US15866826

申请日：2018-01-10

Applicant: NICHIA CORPORATION

Inventor： Shoji Hosokawa ,  Kazuya Nishimata ,  Tomokazu Yoshida

IPC: G02F1/1335

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. The light-emitting device has an emission spectrum with a relative emission intensity of 35% or less at 500 nm and of 65% or less at 540 nm when a local maximum light-emitting emission intensity in a range of from 510 nm to 535 nm is taken as 100%.