公开(公告)号：US11489093B2

公开(公告)日：2022-11-01

申请号：US16942983

申请日：2020-07-30

Applicant: NICHIA CORPORATION

Inventor： Chihiro Yamada ,  Daisuke Iwakura

IPC: H01L33/50 ,  H04N5/33 ,  H04N5/225 ,  H01L33/00

Abstract: A illumination device comprises an excitation light source, a first fluorescent material that converts the wavelength of light emitted from the excitation light source and emits light having a light emission peak wavelength in a range of 780 nm or more and 1,600 nm or less, and a cut filter that blocks light in a wavelength range of 870 nm or less, wherein the first fluorescent material contains a fluorescent material having a composition of rare earth aluminate containing Ce and Nd.

公开(公告)号：US11168865B2

公开(公告)日：2021-11-09

申请号：US15636645

申请日：2017-06-29

Applicant: NICHIA CORPORATION

Inventor： Masafumi Kuramoto ,  Daisuke Iwakura

IPC: G01V8/00 ,  F21V5/02 ,  H01L25/075 ,  G02B19/00 ,  G02F1/13357 ,  H01L33/20 ,  F21V8/00 ,  H01L33/50 ,  G02F1/1335

Abstract: A light-emitting device includes a package having a recessed portion defined by a bottom surface and lateral walls surrounding the bottom surface, first and second light-emitting elements aligned in the longitudinal direction on the bottom surface, and a wavelength conversion member in the recessed portion, the wavelength conversion member converting light from the first light-emitting element. The first and second light-emitting elements each have a polygonal shape other than a rectangular shape in a front view. The first and second light-emitting elements are disposed away from each other so that a longest side of each light-emitting element will be substantially parallel to the longitudinal direction of the bottom surface and so that sides facing each other will be substantially parallel to each other. The wavelength conversion member is disposed at least in a region on the bottom surface between the first and second light-emitting elements.

公开(公告)号：US10608150B2

公开(公告)日：2020-03-31

申请号：US15993014

申请日：2018-05-30

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 light-transmissive member having a first surface, a second surface opposite the first surface, and a third surface contiguous with the first surface and the second surface; a phosphor layer disposed opposite to the second surface of the light-transmissive member; a cover layer disposed on a lateral surface of the phosphor layer and the third surface of the light-transmissive member; a light-emitting element disposed opposite to the phosphor layer; and a light-reflective member that covers at least a portion of the cover layer.

公开(公告)号：US10535794B2

公开(公告)日：2020-01-14

申请号：US15851636

申请日：2017-12-21

Applicant: NICHIA CORPORATION

Inventor： Masafumi Kuramoto ,  Daisuke Iwakura

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

Abstract: A method for manufacturing a light emitting device includes placing a light emitting element on a releasable base material so that a first face of the light emitting element is in contact with the releasable base material. An entire area of the first face is a first area. A wavelength converting material is provided on the releasable base material to cover an entirety of the light emitting element. The releasable base material is removed. A first electrically conductive material covers the first electrode and the wavelength converting material. An entire area of the first electrically conductive material viewed in a height direction is a second area larger than the first area. A second electrically conductive material covers the second electrode and the wavelength converting material. An entire area of the second electrically conductive material viewed in the height direction is a third area larger than the first area.

公开(公告)号：US10797203B2

公开(公告)日：2020-10-06

申请号：US16280045

申请日：2019-02-20

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-transmissive member including a first surface, a second surface opposite to the first surface, and third surfaces connected to the first surface and the second surface. A phosphor layer faces the second surface of the light-transmissive member. A reflective member faces side surfaces of the phosphor layer and the third surfaces of the light-transmissive member. The light-emitting element has a top surface facing the phosphor layer, a bottom surface opposite to the top surface, and side surfaces connecting the top surface and the bottom surface. The phosphor layer has a bonding surface facing the light emitting element. A first dielectric multilayer film is arranged on at least one of side surfaces of the light-emitting element without being provided on the bonding surface of the phosphor layer.

公开(公告)号：US10734556B2

公开(公告)日：2020-08-04

申请号：US16393965

申请日：2019-04-25

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura

IPC: H01L33/50 ,  H01L33/46 ,  H01L33/60 ,  H01L33/62

Abstract: A method for manufacturing a light emitting device includes disposing on lateral surfaces of the light emitting element, a first wavelength converting member containing a first phosphor to convert the first light emitted from the light emitting element into a second light having a second peak wavelength longer than the first peak wavelength. The light emitting element provided with the first wavelength converting member is disposed on a base. A second wavelength converting member is disposed on the base. The second wavelength converting member covers an upper surface of the light emitting element provided with the first wavelength converting member and lateral surfaces of the first wavelength converting member provided opposite to additional lateral surfaces of the first wavelength converting member. The additional lateral surfaces face the lateral surface of the light emitting element. The second wavelength converting member contains a second phosphor.

公开(公告)号：US10326060B2

公开(公告)日：2019-06-18

申请号：US15662287

申请日：2017-07-28

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura

IPC: H01L33/50 ,  H01L33/46 ,  H01L33/60 ,  H01L33/62

Abstract: A light emitting device includes a light emitting element to emit a first light having a first peak wavelength. A second wavelength converting member contains a second phosphor to convert the first light into a third light having a third peak wavelength longer than the first peak wavelength and shorter than a second peak wavelength. The second wavelength converting member includes a portion in which the second wavelength converting member has a first concentration of the second phosphor at a height of an upper surface of the light emitting element in a height direction and a second concentration of the second phosphor at a height of a lower surface of the light emitting element in the height direction. The second concentration is higher than the first concentration such that the second phosphor reflects the second light.

公开(公告)号：US09841552B2

公开(公告)日：2017-12-12

申请号：US14869171

申请日：2015-09-29

Applicant: NICHIA CORPORATION

Inventor： Yusaku Achi ,  Daisuke Iwakura

IPC: F21V8/00

CPC classification number: G02B6/0068 ,  G02B6/0023

Abstract: A backlight device includes a light guide plate having an incident surface, a first side surface, and a second side surface. The first side surface extends from a first end of the incident surface and the second side surface extends from a second end of the incident surface. A green illuminant faces the incident surface and emits a green light toward the incident surface. A red illuminant faces the incident surface and emits a red light toward the incident surface. A white illuminant disposed on a side of at least one end of the first and second ends of the incident surface emits a white light toward the light guide plate. At least one of the emitted green light and the emitted red light includes a blue component having an emission peak wavelength in a range of 420 to 500 nm.

公开(公告)号：US09608180B2

公开(公告)日：2017-03-28

申请号：US15273298

申请日：2016-09-22

Applicant: NICHIA CORPORATION

Inventor： Daisuke Iwakura

IPC: H01L33/54 ,  H01L33/50 ,  H01L33/62

CPC classification number: H01L33/54 ,  H01L33/508 ,  H01L33/62 ,  H01L2224/48091 ,  H01L2224/48137 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/8592 ,  H01L2933/0033 ,  H01L2933/005 ,  H01L2924/00014

Abstract: A light emitting device comprises a package having a recess; a light emitting element mounted in the recess of the package; a light transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; and a fluorescent material contained in the sealing resin. The fluorescent material is distributed to a side of the light emitting element in a greater amount than to above the light emitting element, a side surface of the light emitting element is exposed to the sealing resin, and a portion of the light transmissive member protrudes from the sealing resin.

公开(公告)号：US11692683B2

公开(公告)日：2023-07-04

申请号：US17369521

申请日：2021-07-07

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

CPC classification number: F21S43/255 ,  B60Q1/34 ,  B60Q1/44 ,  C09K11/641 ,  C09K11/7706 ,  F21S43/16 ,  F21V9/08 ,  F21V9/32 ,  F21V9/40 ,  H01L25/0753 ,  H01L33/486 ,  H01L33/502 ,  H01L33/507 ,  H01L33/60 ,  B60Q2400/20 ,  F21W2103/20 ,  F21W2103/35

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.