公开(公告)号：US20230072941A1

公开(公告)日：2023-03-09

申请号：US17800940

申请日：2021-02-05

Applicant: NICHIA CORPORATION

Inventor： Hiroshi MIYAIRI ,  Takayuki IGARASHI ,  Shinya ENDO ,  Yoshifumi HODONO ,  Yoshimi KATSUMOTO

IPC: H01L33/50 ,  H01L33/00 ,  H01L33/56 ,  H01L33/10

Abstract: A light-emitting device includes a substrate, a light-emitting element provided on the substrate, the light-emitting element being configured to emit a first light, a wavelength conversion layer provided on the light-emitting element and containing a plurality of wavelength conversion particles configured to convert a wavelength of a part of the first light and to emit a second light, a light-transmissive plate provided above the wavelength conversion layer, and a wall including a light-reflective material, the wall surrounding the wavelength conversion layer and the light-transmissive plate and being in contact with a lateral surface of the light-transmissive plate at an inner surface of the wall. An upper portion of the wavelength conversion layer includes protrusions and recesses defined by the plurality of wavelength conversion particles. The wavelength conversion layer and the light-transmissive plate define an air layer therebetween.

公开(公告)号：US20210265536A1

公开(公告)日：2021-08-26

申请号：US17154464

申请日：2021-01-21

Applicant: NICHIA CORPORATION

Inventor： Hiroshi MIYAIRI ,  Yoshimi KATSUMOTO ,  Takayuki IGARASHI ,  Yoshifumi HODONO ,  Shinya ENDO

IPC: H01L33/50 ,  H01L33/60 ,  H01L33/54

Abstract: A light emitting device includes: a substrate; a light emitting element; a wavelength conversion layer; and a wall surrounding the wavelength conversion layer, having an opening portion exposing at least a part of a top surface of the wavelength conversion layer, and containing a light reflective material. The surface of the wall includes a top surface provided at a higher position than the top surface of the wavelength conversion layer, and an inner surface forming the opening portion. The wall includes a first portion surrounding the wavelength conversion layer, and a second portion provided over the first portion and surrounding the first portion. The opening portion is hollow. An angle of a corner portion between the top surface and the inner surface of the wall is in a range of 90 degrees or greater and less than 180 degrees.

公开(公告)号：US20240088332A1

公开(公告)日：2024-03-14

申请号：US18511451

申请日：2023-11-16

Applicant: Nichia Corporation

Inventor： Hiroshi MIYAIRI ,  Yoshimi KATSUMOTO ,  Takayuki IGARASHI ,  Yoshifumi HODONO ,  Shinya ENDO

IPC: H01L33/50 ,  H01L33/54 ,  H01L33/60

CPC classification number: H01L33/505 ,  H01L33/507 ,  H01L33/54 ,  H01L33/60 ,  H01L2933/0041 ,  H01L2933/005 ,  H01L2933/0058

Abstract: A light emitting device includes: a substrate; a light emitting element; a wavelength conversion layer; and a wall surrounding the wavelength conversion layer, having an opening portion exposing at least a part of a top surface of the wavelength conversion layer, and containing a light reflective material. The surface of the wall includes a top surface provided at a higher position than the top surface of the wavelength conversion layer, and an inner surface forming the opening portion. The wall includes a first portion surrounding the wavelength conversion layer, and a second portion provided over the first portion and surrounding the first portion. The opening portion is hollow. An angle of a corner portion between the top surface and the inner surface of the wall is in a range of 90 degrees or greater and less than 180 degrees.