公开(公告)号：US20210098656A1

公开(公告)日：2021-04-01

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

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：US20230109952A1

公开(公告)日：2023-04-13

申请号：US17907354

申请日：2021-02-10

Applicant: NICHIA CORPORATION

Inventor： Makiko IWASA ,  Yuji SATO

IPC: H01L33/50 ,  H05B33/14

Abstract: Provided is a light-emitting device having a high luminous flux.
The light-emitting device comprises a light-emitting element 11 that has a dominant wavelength in a range of 380 nm or more and 485 nm or less, and a fluorescent material layer 31 that includes a fluorescent material emitting light by being excited by light emitted from the light-emitting element 11, and a neodymium compound, wherein the light-emitting device emits light having a dominant wavelength in a range of 584 nm or more and 780 nm or less.

公开(公告)号：US20230045870A1

公开(公告)日：2023-02-16

申请号：US17757918

申请日：2020-10-23

Applicant: NICHIA CORPORATION

Inventor： Makiko IWASA ,  Yuji SATO

IPC: H01L33/50 ,  C09K11/77

Abstract: Provided is a light emitting device that is bright in both scotopic vision and photopic vision, and has reduced glare for humans.
The light emitting device includes a light emitting element having a dominant wavelength in a range of 430 nm or more and 500 nm or less, and a fluorescent material that is excited by light emitted from the light emitting element and has a light emission peak wavelength in a range of 507 nm or more and 660 nm or less, wherein the light emitting device emits light having a dominant wavelength in a range of 490 nm or more and 500 nm or less, wherein the light emitting device has an S/P ratio, which is the ratio of a luminous flux in photopic vision to a luminous flux in scotopic vision, being 6.5 or less, and wherein the light emitting device has a light emission intensity in the light emission peak wavelength of the light emitting element that is greater than that in the light emission peak wavelength of the fluorescent material.

公开(公告)号：US20210231293A1

公开(公告)日：2021-07-29

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

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：US20170186920A1

公开(公告)日：2017-06-29

申请号：US15386071

申请日：2016-12-21

Applicant: NICHIA CORPORATION

Inventor： Masami KUMANO ,  Yuji SATO

IPC: H01L33/50 ,  H01L33/60

CPC classification number: H01L33/502 ,  H01L33/501 ,  H01L33/505 ,  H01L33/60 ,  H01L33/644 ,  H01L2933/0041 ,  H01L2933/0058

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：US20240093846A1

公开(公告)日：2024-03-21

申请号：US18467677

申请日：2023-09-14

Applicant: NICHIA CORPORATION

Inventor： Yuya GOTO ,  Koji KAJIKAWA ,  Yuji SATO

IPC: F21S41/176

CPC classification number: 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.

公开(公告)号：US20240159375A1

公开(公告)日：2024-05-16

申请号：US18506981

申请日：2023-11-10

Applicant: NICHIA CORPORATION

Inventor： Yuji SATO ,  Takuya NOICHI ,  Masafumi SAKAMOTO

IPC: F21S43/249 ,  F21S43/20 ,  F21S43/239 ,  F21S43/243 ,  F21V9/32

CPC classification number: F21S43/249 ,  F21S43/239 ,  F21S43/243 ,  F21S43/26 ,  F21V9/32

Abstract: A vehicle lamp includes a light guide plate including a plurality of light-exiting portions and a low-luminance portion, which is located between adjacent light-exiting portions and outputs light having luminance lower than luminance of light exiting from the light-exiting portion; a plurality of light sources each emit light having a light emission peak wavelength in a range from 420 nm to 550 nm to enter the light guide plate; and a wavelength conversion member that is disposed on the plurality of light-exiting portions and emits light having a light emission peak wavelength in a range from 540 nm to 700 nm by converting a wavelength of the light exiting from the light-exiting portion.

公开(公告)号：US20200309346A1

公开(公告)日：2020-10-01

申请号：US16831191

申请日：2020-03-26

Applicant: NICHIA CORPORATION

Inventor： Makiko IWASA ,  Yuji SATO ,  Hiroki FUKUTA

IPC: F21V9/30

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：US20210098659A1

公开(公告)日：2021-04-01

申请号：US17031403

申请日：2020-09-24

Applicant: NICHIA CORPORATION

Inventor： Makiko IWASA ,  Yuji SATO ,  Miyuki KURATA

IPC: H01L33/50

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.