公开(公告)号：US20220165929A1

公开(公告)日：2022-05-26

申请号：US17535565

申请日：2021-11-24

Applicant: NICHIA CORPORATION

Inventor： Takahito MIKI

IPC: H01L33/62 ,  H01L33/50 ,  H01L27/15 ,  H01L33/00

Abstract: A light-emitting device includes a substrate, first and second light-emitting elements, a first frame, and first and second wavelength conversion members. The first light-emitting element is disposed on a first surface or first wirings of the substrate and electrically connected to the first wirings via first connecting members. The second light-emitting element is disposed on a surface of the first light-emitting element, and electrically connected to the second wirings via second connecting members. The first frame surrounds the first and second light-emitting elements in a top view. The first wavelength conversion member is disposed in a region surrounded by the first frame. The second wavelength conversion member is disposed in at least a part of the region surrounded by the first frame in the top view. A chromaticity of light converted by the first wavelength conversion member differs from a chromaticity of light converted by the second wavelength conversion member.

公开(公告)号：US20210336098A1

公开(公告)日：2021-10-28

申请号：US17233079

申请日：2021-04-16

Applicant: NICHIA CORPORATION

Inventor： Takahito MIKI

IPC: H01L33/50 ,  H01L33/58 ,  H01L33/60

Abstract: A light-emitting device includes a support; a light-emitting element on or above the support; a first wavelength conversion member on or above the light-emitting element, the first wavelength conversion member having an area larger than that of the light-emitting element in a top view; a first light-transmissive member covering a lower surface of an extension region of the first wavelength conversion member an a lateral surface of the light-emitting element; a first light-reflective member on lateral sides of the first wavelength conversion member and the first light-transmissive member; and a second wavelength conversion member disposed on or above the first wavelength conversion member. A thickness of the second wavelength conversion member above a peripheral portion of the first wavelength conversion member is smaller than a thickness of the second wavelength conversion member above a central portion of the first wavelength conversion member.

公开(公告)号：US20250063870A1

公开(公告)日：2025-02-20

申请号：US18939488

申请日：2024-11-06

Applicant: NICHIA CORPORATION

Inventor： Takahito MIKI

IPC: H01L33/60 ,  H01L23/00 ,  H01L25/16 ,  H01L33/50 ,  H01L33/56 ,  H01L33/58 ,  H01L33/62

Abstract: A light-emitting device includes: a light-emitting element having a first surface as a light extraction surface, a second surface on an opposite side of the first surface, and a lateral surface connecting the first surface and the second surface and including an element electrode on the second surface; a substrate including a wiring member electrically connected to the element electrode; a light-transmissive member disposed above the first surface of the light-emitting element and allowing light from the light-emitting element to pass through; an inorganic member including a plurality of voids and disposed, on the substrate, on a lateral surface or lateral to the light-emitting element and on a lateral surface of the light-transmissive member; and a light-reflective member in contact with at least part of the inorganic member. A portion of the light-reflective member is impregnated in at least a portion of the plurality of voids.

公开(公告)号：US20240222573A1

公开(公告)日：2024-07-04

申请号：US18557287

申请日：2021-11-25

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Takahito MIKI

IPC: H01L33/50 ,  A01M29/10 ,  C09K11/77

CPC classification number: H01L33/502 ,  A01M29/10 ,  C09K11/77347 ,  C09K11/77348 ,  C09K11/7774

Abstract: Provided is a light-emitting device, a light fixture, and a street light with a further reduced insect-attracting effect. A light-emitting device includes a light-emitting element having an emission peak wavelength within a range from 400 nm to 490 nm; and a first phosphor having an emission peak wavelength within a range from 570 nm to 680 nm, wherein the light-emitting device has a correlated color temperature of 1950 K or less, an average color rendering index Ra of 51 or greater, and a full width at half maximum of an emission peak having a maximum light emission intensity in an emission spectrum of the light-emitting device of 110 nm or less, and the light-emitting device emits light having an insect-attracting index I of 0.031 or less, which is a ratio of an effective radiance of the light-emitting device in consideration of spectral luminous efficiency of insects in a range from 250 nm to 615 nm to a luminance of light emitted by the light-emitting device in a range from 380 nm to 780 nm in consideration of spectral luminous efficiency for human photopic vision specified by the CIE (International Commission on Illumination).