公开(公告)号：US20230207747A1

公开(公告)日：2023-06-29

申请号：US17995109

申请日：2021-02-17

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Kazushige FUJIO ,  Atsushi BANDO

IPC: H01L33/50 ,  C09K11/77 ,  C09K11/61

CPC classification number: H01L33/504 ,  C09K11/7774 ,  C09K11/77348 ,  C09K11/617 ,  C09K11/7734 ,  C09K11/77342

Abstract: A light emission device including a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less; and a fluorescent member including a first fluorescent material having a light emission peak wavelength in a range of 510 nm or more and less than 580 nm, a second fluorescent material having a light emission peak wavelength in a range of 580 nm or more and 680 nm or less and a full width at half maximum of 15 nm or more and 100 nm or less, and a third fluorescent material having a light emission peak wavelength in a range of 600 nm or more and 650 nm or less and a full width at half maximum of 14 nm or less, and having a melanopic ratio (MR) value in a specified range at a certain correlated color temperature.

公开(公告)号：US20240279541A1

公开(公告)日：2024-08-22

申请号：US18575859

申请日：2022-02-22

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Miyuki KURATA ,  Kazushige FUJIO

IPC: C09K11/08 ,  C09K11/77 ,  H01L33/50

CPC classification number: C09K11/0883 ,  C09K11/0827 ,  C09K11/7706 ,  H01L33/504 ,  H01L33/505

Abstract: Provided are a light-emitting device, a lighting appliance, and a lighting fixture that emit light that tends to promote melatonin secretion. The light-emitting device, the lighting appliance, and the lighting fixture include a light-emitting element having an emission peak wavelength in a range of 400 nm to 490 nm and a first phosphor having an emission peak wavelength in a range of 570 nm to 680 nm. The emitted light has a correlated color temperature that is 1950 K or less, an average color rendering index Ra that is 40 or greater, a full width at half maximum of an emission spectrum indicating a maximum emission intensity in an emission spectrum of the light-emitting device that is 110 nm or less, and a melanopic ratio MR derived from Equation (1) that is 0.233 or less.

公开(公告)号：US20220349553A1

公开(公告)日：2022-11-03

申请号：US17660723

申请日：2022-04-26

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Kazushige FUJIO

IPC: F21V9/30 ,  F21S8/08 ,  C09K11/77 ,  C09K11/61

Abstract: A light emitting device comprises a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less and a first fluorescent material having a light emission peak wavelength in a range of 570 nm or more and 680 nm or less, and emits light having a correlated color temperature being 1,950 K or less, an average color rendering index Ra being 51 or more, a full width at half maximum of a light emission peak having a maximum light emission intensity in a light emission spectrum of the light emitting device being 110 nm or less, and a first glare index Ls1/L that is a ratio of a first effective radiance Ls1 to a luminance L being 0.493 or less, wherein Ls1 and L are as defined in the disclosure.

公开(公告)号：US20250052382A1

公开(公告)日：2025-02-13

申请号：US18931753

申请日：2024-10-30

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Miyuki KURATA ,  Kazushige FUJIO

IPC: F21K9/64 ,  F21V9/30 ,  H01L33/50

Abstract: Provided is a light-emitting device, a lighting appliance, and a street light that emit light with minimal negative effects on the behavior of sea turtles and which makes irradiated objects easily visible to humans. The 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, lighting appliance, and street light emit light that has a correlated color temperature of 1950 K or less, an average color rendering index Ra of 40 or greater, a full width at half maximum of an emission spectrum indicating a maximum emission intensity in an emission spectrum of the light-emitting device of 110 nm or less, and a sea turtle light attraction index T derived from Equation (1) of 0.416 or less.

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).

公开(公告)号：US20220349533A1

公开(公告)日：2022-11-03

申请号：US17660784

申请日：2022-04-26

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Kazushige FUJIO

IPC: F21K9/64 ,  H01L33/50

Abstract: A light emitting device comprises a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less and a first fluorescent material having a light emission peak wavelength in a range of 570 nm or more and 680 nm or less, and emits light having a correlated color temperature being 1,950 K or less, an average color rendering index Ra being 70 or more, a full width at half maximum of a light emission peak having the maximum light emission intensity being 110 nm or less, and a ratio B/L of an effective radiance B to a luminance L being 0.151 or less, wherein the luminance of light emitted by the light emitting device in a range of 300 nm or more and 800 nm or less when B and L is as defined in the disclosure.

公开(公告)号：US20210289711A1

公开(公告)日：2021-09-23

申请号：US17263608

申请日：2019-07-26

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Kazushige FUJIO ,  Sadakazu WAKUI ,  Tomokazu SUZUKI ,  Masato FUJIWARA ,  Munetake FUKUNAGA

IPC: A01G7/04 ,  A01G9/20

Abstract: An output of light suitable for growing plants is controlled using a white light source.
A growing system including a greenhouse and a plurality of lighting devices disposed above a plant to be grown in the greenhouse and utilizing natural light includes a plurality of white light sources, a plurality of auxiliary light sources each of which is configured to emit red light and far-red light, and an illumination controller configured to control a degree of emission of light from the white light sources or the auxiliary light sources of the plurality of lighting devices, the illumination controller configured to start or stop controlling emission of light from the white light sources or the auxiliary light sources according to sunrise or sunset.

公开(公告)号：US20250052381A1

公开(公告)日：2025-02-13

申请号：US18928790

申请日：2024-10-28

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Kazushige FUJIO

IPC: F21K9/64 ,  C09K11/77 ,  F21W131/103 ,  F21Y115/10

Abstract: A light emitting device comprises a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less and a first fluorescent material having a light emission peak wavelength in a range of 570 nm or more and 680 nm or less, and emits light having a correlated color temperature being 1,950 K or less, an average color rendering index Ra being 70 or more, a full width at half maximum of a light emission peak having the maximum light emission intensity being 110 nm or less, and a ratio B/L of an effective radiance B to a luminance L being 0.151 or less, wherein the luminance of light emitted by the light emitting device in a range of 300 nm or more and 800 nm or less when B and L is as defined in the disclosure.

公开(公告)号：US20240310009A1

公开(公告)日：2024-09-19

申请号：US18576054

申请日：2022-02-22

Applicant: NICHIA CORPORATION

Inventor： Mika MATSUMOTO ,  Miyuki KURATA ,  Kazushige FUJIO

IPC: F21K9/64

CPC classification number: F21K9/64

Abstract: Provided is a light-emitting device, a lighting appliance, and a street light that emit light with minimal negative effects on the behavior of sea turtles and which makes irradiated objects easily visible to humans. The 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, lighting appliance, and street light emit light that has a correlated color temperature of 1950 K or less, an average color rendering index Ra of 40 or greater, a full width at half maximum of an emission spectrum indicating a maximum emission intensity in an emission spectrum of the light-emitting device of 110 nm or less, and a sea turtle light attraction index T derived from Equation (1) of 0.416 or less.