公开(公告)号：US11162025B2

公开(公告)日：2021-11-02

申请号：US16378929

申请日：2019-04-09

Applicant: NICHIA CORPORATION

Inventor： Yoshinori Murazaki

IPC: C09K11/77 ,  C09K11/63 ,  C09K11/08 ,  F21K9/64 ,  C09K11/57 ,  F21Y115/10 ,  F21Y115/30 ,  H01L33/50

Abstract: A boron nitride fluorescent material, having at least one light emission peak wavelength in a range of 480 nm or more and less than 650 nm as excited with light having a light emission peak wavelength in a range of 250 nm or more and 460 nm or less, and comprising: at least one element A selected from the group consisting of alkaline earth metal elements; nitrogen and boron; and optionally at least one element M1 selected from the group consisting of Tb, Sm, Pr, Ce, Mn, and Yb.

公开(公告)号：US11292963B2

公开(公告)日：2022-04-05

申请号：US16212450

申请日：2018-12-06

Applicant: NICHIA CORPORATION

Inventor： Yoshinori Murazaki

IPC: C09K11/02 ,  C09K11/77 ,  C04B35/645 ,  C04B35/44 ,  H01L33/50 ,  C09K11/08

Abstract: Provided is a wavelength converting member and a method of producing the same. Proposed is a wavelength converting member including: a fluorescent material containing at least one kind selected from a nitride-based fluorescent material and an oxynitride-based fluorescent material; and an aluminate containing at least one kind selected from the group consisting of a rare earth aluminate and an alkaline earth metal aluminate. Further, a method of producing a wavelength converting member, including: preparing a molded body obtained by mixing a fluorescent material containing at least one kind selected from a nitride-based fluorescent material and an oxynitride-based fluorescent material and an aluminate containing at least one kind selected from the group consisting of a rare earth aluminate and an alkaline earth metal aluminate; and sintering the molded body to obtain a wavelength converting member containing the fluorescent material and the aluminate, is proposed.

公开(公告)号：US10700242B2

公开(公告)日：2020-06-30

申请号：US15854391

申请日：2017-12-26

Applicant: NICHIA CORPORATION

Inventor： Yoshinori Murazaki

IPC: H01L33/50 ,  C09K11/61 ,  C09K11/77 ,  C09K11/02

Abstract: Provided is a method of producing a wavelength conversion member, comprising the steps of forming a fluorescent material layer on the top surface of a substrate and filling a translucent material into the fluorescent material layer. The fluorescent material layer contains fluorescent material particles and has voids between the fluorescent material particles. The translucent material has a lower refractive index than the fluorescent material particles and is filled into a part of the voids to form a filled region in a manner to allow the voids to be partially left unfilled with the translucent material.

公开(公告)号：US09609293B2

公开(公告)日：2017-03-28

申请号：US14947072

申请日：2015-11-20

Applicant: NICHIA CORPORATION

Inventor： Naoki Saka ,  Yoshinori Murazaki ,  Isamu Niki

IPC: H04N9/31 ,  G02B26/00 ,  G02B27/14 ,  G03B21/20 ,  G03B21/00 ,  G03B33/08

CPC classification number: G03B21/204 ,  G02B26/008 ,  G02B27/141 ,  G03B21/005 ,  G03B33/08 ,  H04N9/3114 ,  H04N9/3117 ,  H04N9/3161

Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.

公开(公告)号：US09823557B2

公开(公告)日：2017-11-21

申请号：US15430735

申请日：2017-02-13

Applicant: NICHIA CORPORATION

Inventor： Naoki Saka ,  Yoshinori Murazaki ,  Isamu Niki

IPC: H04N9/31 ,  G02B26/00 ,  G03B21/20 ,  G02B27/14

CPC classification number: G03B21/204 ,  G02B26/008 ,  G02B27/141 ,  G03B21/005 ,  G03B33/08 ,  H04N9/3114 ,  H04N9/3117 ,  H04N9/3161

Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.