公开(公告)号：US11482647B2

公开(公告)日：2022-10-25

申请号：US17032755

申请日：2020-09-25

Applicant: NICHIA CORPORATION

Inventor： Yuji Sato ,  Miyuki Kurata

IPC: H01L33/50 ,  H01L25/16 ,  C09K11/77 ,  H01L33/32

Abstract: A light emitting device includes: a light emitting element having a light emission peak wavelength in a range of 380 nm or more and 470 nm or less, and a wavelength conversion member disposed on a light emission side of the light emitting device and comprising: a fluorescent material layer containing a fluorescent material excited by light emitted from the light emitting device, having a light emission peak wavelength in a range of 500 nm or more and 780 nm or less, and a band-pass filter layer disposed on a light emission side of the fluorescent material layer.

公开(公告)号：US11313536B2

公开(公告)日：2022-04-26

申请号：US17228466

申请日：2021-04-12

Applicant: NICHIA CORPORATION

Inventor： Makiko Iwasa ,  Yuji Sato ,  Hiroki Fukuta

IPC: F21V9/30 ,  H01L33/50 ,  F21Y115/10

Abstract: A light emitting device includes: a light emitting element having a dominant wavelength in a range greater than or equal to 380 nm and less than or equal to 470 nm; a wavelength conversion member that is disposed on the light emitting element and includes: a translucent member, and a first fluorescent material layer interposed between the light emitting element and the translucent material, the first fluorescent material layer comprising a resin that contains a first fluorescent material, and the first fluorescent material comprising at least one compound selected from (Ca, Sr)AlSiN3: Eu and (Ca, Sr, Ba)2Si5N8: Eu; and a covering member that covers sides of the wavelength conversion member and surrounds the light emitting element, the covering member comprising light reflecting material and a second fluorescent material, and the second fluorescent material comprising at least one compound selected from (Ca, Sr)AlSiN3: Eu and (Ca, Sr, Ba)2Si5N8: Eu.

公开(公告)号：US11002427B2

公开(公告)日：2021-05-11

申请号：US16831191

申请日：2020-03-26

Applicant: NICHIA CORPORATION

Inventor： Makiko Iwasa ,  Yuji Sato ,  Hiroki Fukuta

IPC: F21V9/30 ,  H01L33/50 ,  F21Y115/10

Abstract: A light emitting device has a covering member. The covering member includes light reflecting material and a second fluorescent material, and a dominant wavelength of an emission spectrum of the second fluorescent material differs from a dominant wavelength of an emission spectrum of the light emitting device by 30 nm or less. The light emitting device emits light with chromaticity that is within a four-sided region on a CIE 1931 chromaticity diagram, where chromaticity coordinates (x, y) are (0.645, 0.335) at a first point, (0.665, 0.335) at a second point, (0.735, 0.265) at a third point, (0.721, 0.259) at a fourth point, and a first line joins the first and second points, a second line joins the second and third points, a third line joins the third and fourth points, and a fourth line joins the fourth and first points to define the four-sided region of the chromaticity diagram.

公开(公告)号：US11489094B2

公开(公告)日：2022-11-01

申请号：US17031403

申请日：2020-09-24

Applicant: NICHIA CORPORATION

Inventor： Makiko Iwasa ,  Yuji Sato ,  Miyuki Kurata

IPC: H01L33/50 ,  H01L33/60

Abstract: A light emitting device includes: a light emitting element having a light emission peak wavelength in a range of 380 nm or more and 485 nm or less; a wavelength conversion member including a fluorescent material layer disposed on a light emission side of the light emitting element and containing a fluorescent material having a reflectance to light having a wavelength of 450 nm of 10% or less and a light emission peak wavelength in a range of 610 nm or more and 780 nm or less, and a dielectric multilayer film disposed on a light emission side of the fluorescent material layer.

公开(公告)号：US10374132B2

公开(公告)日：2019-08-06

申请号：US15386071

申请日：2016-12-21

Applicant: NICHIA CORPORATION

Inventor： Masami Kumano ,  Yuji Sato

IPC: H01L21/00 ,  H01L33/50 ,  H01L33/60

Abstract: A method of manufacturing a wavelength conversion member with improved capability of releasing heat from a fluorescent material is provided. The method of manufacturing the wavelength conversion member includes: disposing a fluorescent material paste containing a fluorescent material and a binder on a surface of a light-transmissive body; orienting face-down the surface where the fluorescent material paste is disposed, to settle the fluorescent material in the fluorescent material paste on a side opposite to another side of the fluorescent material paste, the another side being in contact with the light-transmissive body; and curing the binder in a state where the fluorescent material has been settled, to form a fluorescent material layer.

公开(公告)号：US12209722B2

公开(公告)日：2025-01-28

申请号：US18467677

申请日：2023-09-14

Applicant: NICHIA CORPORATION

Inventor： Yuya Goto ,  Koji Kajikawa ,  Yuji Sato

IPC: F21S41/176

Abstract: The vehicle light-emitting device includes a light-emitting element having a peak emission wavelength of 400 nm or greater and 510 nm or less, and a fluorescent member including a first phosphor excited by light emitted by the light-emitting element and emitting light having a peak emission wavelength of 480 nm or greater and 530 nm or less a second phosphor excited by the light emitted by the light-emitting element and emitting light having a peak emission wavelength of 540 nm or greater and 600 nm or less. The vehicle light-emitting device emits light in a region AL in a CIE1931 chromaticity diagram as defined in the present disclosure.