公开(公告)号：US11674666B2

公开(公告)日：2023-06-13

申请号：US17837746

申请日：2022-06-10

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura

IPC: F21V5/04 ,  F21V7/00 ,  F21V8/00 ,  H01L33/58 ,  H01L33/60 ,  H01L33/62 ,  F21Y105/16 ,  G02F1/13357

CPC classification number: F21V5/043 ,  F21V7/0066 ,  G02B6/0021 ,  G02B6/0051 ,  G02B6/0055 ,  G02B6/0065 ,  G02B6/0083 ,  H01L33/58 ,  H01L33/60 ,  H01L33/62 ,  F21V2200/20 ,  F21Y2105/16 ,  G02B6/0031 ,  G02B6/0068 ,  G02F1/133605

Abstract: A light-emitting module includes: a light source; a light guide plate including an upper surface and a lower surface, the lower surface being at a side opposite to the upper surface, the light guide plate being configured to guide light from the light source; a wavelength conversion sheet located at an upper surface side of the light guide plate; a first light-reflective member located at a lower surface side of the light guide plate, the first light-reflective member including: a first resin member, and a first reflector, where a refractive index of the first reflector is lower than a refractive index of the first resin member; and a second light-reflective member located at a lower surface side of the first light-reflective member, wherein the second light-reflective member includes: a second resin member, and a second reflector, where a refractive index of the second reflector is higher than a refractive index of the second resin member.

公开(公告)号：US11011685B2

公开(公告)日：2021-05-18

申请号：US16799017

申请日：2020-02-24

Applicant: NICHIA CORPORATION

Inventor： Taiki Yuasa ,  Daisuke Iwakura

IPC: H01L33/50 ,  H01L33/48 ,  H01L33/60 ,  H01L33/44 ,  H01L33/46

Abstract: A method of manufacturing a light-emitting device includes steps of: preparing at least one first member each including (i) a light-transmissive member having a top surface, a bottom surface, and a lateral surface contiguous with the top surface and the bottom surface, (ii) a phosphor layer disposed below the bottom surface, and (iii) a cover layer disposed on a lateral surface of the phosphor layer and the lateral surface of the light-transmissive member; and, for each of the at least one first member, mounting a light-emitting element on a base having a fat plate shape, bonding the light-emitting element and the phosphor layer of the first member together, placing a frame body on the base so as to surround the light-emitting element, and filling a light-reflective member in the frame body so that the light-reflective member covers at least a portion of the cover layer of the first member.

公开(公告)号：US09851487B2

公开(公告)日：2017-12-26

申请号：US14794644

申请日：2015-07-08

Applicant: NICHIA CORPORATION

Inventor： Yusaku Achi ,  Daisuke Iwakura

IPC: G02B6/00 ,  F21V8/00

CPC classification number: G02B6/002 ,  G02B6/0068 ,  G02B6/0085 ,  G02B6/009 ,  H01L2224/48091 ,  H01L2924/00014

Abstract: A backlight device includes a light guide plate including a first incident surface, and one or more second incident surfaces that are connected to the first incident surface and inclined with respect to the first incident surface in a top plan view; at least one green illuminant arranged to face one of (i) the first incident surface and (ii) the one or more second incident surfaces; and at least one red illuminant arranged to face the other of (i) the first incident surface and (ii) the one or more second incident surfaces. At least one of (i) the green light emitted from the green illuminant, and (ii) the red light emitted from the red illuminant, contains a blue component whose emission peak wavelength is 420 nm to 500 nm.

公开(公告)号：US09728685B2

公开(公告)日：2017-08-08

申请号：US14192766

申请日：2014-02-27

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura ,  Yusaku Achi

IPC: H01L33/00 ,  H01L33/50 ,  H01L33/54 ,  H01L25/075

CPC classification number: H01L33/50 ,  H01L25/0753 ,  H01L33/505 ,  H01L33/508 ,  H01L33/54 ,  H01L2224/13 ,  H01L2224/45144 ,  H01L2224/48091 ,  H01L2224/48137 ,  H01L2224/73265 ,  H01L2224/8592 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00 ,  H01L2924/00012

Abstract: A light emitting device includes a base that has an element mounting surface, a light emitting element that is mounted on the element mounting surface and that has maximum light intensity in a directly upward direction, and a coating member that contains a fluorescent body that is excited by light from the light emitting element, and that is constituted by a single layer that coats an upper part of the light emitting element. The fluorescent body exists at a position other than directly above the light emitting element.

公开(公告)号：US11637226B2

公开(公告)日：2023-04-25

申请号：US17302248

申请日：2021-04-28

Applicant: NICHIA CORPORATION

Inventor： Taiki Yuasa ,  Daisuke Iwakura

IPC: H01L33/50 ,  H01L33/48 ,  H01L33/60 ,  H01L33/44 ,  H01L33/46

Abstract: A light-emitting device includes: a set of layers including (i) a light-transmissive member having a top surface, a bottom surface, and a lateral surface contiguous with the top surface and the bottom surface, (ii) a first phosphor layer disposed below the bottom surface, and (iii) a dielectric multilayer film between the light-transmissive member and the first phosphor layer; a cover layer disposed on a lateral surface of the set of layers; and a light-emitting element disposed below the first phosphor layer. The light-emitting element emits blue light. The first phosphor layer absorbs at least a portion of the blue light and emits yellow-red to red light. The cover layer is either: a second phosphor layer that absorbs at least a portion of the blue light emitted by the light-emitting element and emits yellow-red to red light, or a pigment layer that presents yellow-red to red light.

公开(公告)号：US11114583B2

公开(公告)日：2021-09-07

申请号：US16705235

申请日：2019-12-06

Applicant: NICHIA CORPORATION

Inventor： Masafumi Kuramoto ,  Daisuke Iwakura

IPC: H01L33/00 ,  H01L33/50 ,  H01L33/60 ,  H01L33/62 ,  H01L23/00 ,  H01L21/56

Abstract: A light emitting element includes a light emitting element having a first face on which a first electrode and a second electrode are provided. A wavelength converting material covers a whole of the light emitting element except for the first face such that a surface of the wavelength converting material and the first face constitute a substantially flat plane. A first electrically conductive material is provided on the first face and the surface of the wavelength converting material to be electrically connected to the first electrode. A second electrically conductive material is provided on the first face and the surface of the wavelength converting material to be electrically connected to the second electrode. An insulating member is disposed on the first electrically conductive material, the second electrically conductive material, and the first face between the first electrode and the second electrode.

公开(公告)号：US11085605B2

公开(公告)日：2021-08-10

申请号：US16260957

申请日：2019-01-29

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura

IPC: F21V9/32 ,  F21S43/20 ,  F21V9/08 ,  F21S43/16 ,  H01L25/075 ,  C09K11/64 ,  H01L33/50 ,  H01L33/60 ,  C09K11/77 ,  H01L33/48 ,  F21V9/40 ,  B60Q1/44 ,  B60Q1/34 ,  F21W103/35 ,  F21W103/20

Abstract: A lighting apparatus includes light emitting elements having an emission peak wavelength of 400 to 510 nm, a first phosphor having an emission peak wavelength of 485 to 700 nm, a second phosphor having an emission peak wavelength of 510 to 590 nm, a third phosphor having an emission peak wavelength of 600 to 700 nm, and a color filter having transmittance for light with a wavelength of 600 to 730 nm that is 80% or more and transmittance for light with a wavelength of 410 to 480 nm that is 3% or more and 50% or less. The color filter transmits a part of light emitted from the first phosphor, at least a part of light emitted from the second phosphor, and at least a part of light emitted from the third phosphor. Light transmitted through the color filter is emitted to the outside.

公开(公告)号：US11043615B2

公开(公告)日：2021-06-22

申请号：US17010828

申请日：2020-09-03

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura ,  Yoshiki Inoue

IPC: H01L33/46 ,  H01L33/50 ,  H01L33/60 ,  C09K11/77 ,  C09K11/64 ,  C09K11/61 ,  H01L33/56 ,  H01L33/54

Abstract: A light-emitting device includes a light-emitting element having a top surface, a bottom surface opposite to the top surface, and side surfaces connecting the top surface and the bottom surface. An element electrode of the light-emitting element is located on the bottom surface. A phosphor layer is disposed above the top surface of the light-emitting element and having side surfaces. A reflective member covers side surfaces of the light-emitting element and side surfaces of the phosphor layer. A dielectric multilayer film is disposed on at least one of the side surfaces of the light-emitting element and disposed on at least one of the side surfaces of the phosphor layer and not located between the light emitting element and the phosphor layer. The dielectric multilayer film is not provided on an upper surface of the phosphor layer.

公开(公告)号：US10121941B2

公开(公告)日：2018-11-06

申请号：US15277498

申请日：2016-09-27

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura ,  Masaki Hayashi ,  Shoji Hosokawa ,  Yusaku Achi

IPC: H01L33/50 ,  H01L33/44 ,  H01L33/52 ,  F21V8/00 ,  G02F1/1335

Abstract: A light source device having: a blue light emitting element that emits blue light having an emission peak in a wavelength region of 440 nm to 460 nm; a green phosphor that absorbs part of the blue light emitted by the blue light emitting element and thereby emits green light having an emission peak in a wavelength region of 500 nm to 575 nm; a red phosphor that absorbs at least one of part of the blue light emitted by the blue light emitting element and part of the green light emitted by the green phosphor, and thereby emits red light having an emission peak in a wavelength region of 600 nm to 690 nm; and an absorbent containing neodymium fluoride that absorbs part of the green light and part of the red light.

公开(公告)号：US09698315B2

公开(公告)日：2017-07-04

申请号：US14926476

申请日：2015-10-29

Applicant: NICHIA CORPORATION

Inventor： Shoji Hosokawa ,  Kimihiro Miyamoto ,  Daisuke Iwakura

IPC: H01L33/50 ,  H01L33/54

CPC classification number: H01L33/502 ,  H01L33/54 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2224/8592 ,  H01L2933/0091

Abstract: A light emitting device is provided which includes a light emitting element, a phosphor, and a sealing member. The light emitting element has a light emission peak wavelength in the range not shorter than 400 nm and not longer than 460 nm. The phosphor can be excited by light from the light emitting element, and emit luminescent radiation with a light emission peak wavelength in the range in not shorter than 600 nm and not longer than 700 nm. The sealing member includes a pigment for absorbing a part of the light from the light emitting element. X of the light emission chromaticity of the light emitting device falls within the range of x≧0.600 in the chromaticity coordinates in the CIE 1931 color space chromaticity diagram.