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：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.

公开(公告)号：US20190097098A1

公开(公告)日：2019-03-28

申请号：US16142586

申请日：2018-09-26

Applicant: NICHIA CORPORATION

Inventor： Kazushige FUJIO ,  Masaki KONDO

IPC: H01L33/50 ,  H01L33/56 ,  H01L33/32

CPC classification number: H01L33/504 ,  C09K11/7734 ,  C09K11/7774 ,  H01L33/32 ,  H01L33/486 ,  H01L33/507 ,  H01L33/56 ,  H01L33/62

Abstract: A light-emitting device is provided. The light-emitting device includes a light-emitting element having a peak light-emitting wavelength in the range of 440 nm to 470 nm, and a fluorescent member. The fluorescent member includes a first fluorescent material having a peak light-emitting wavelength in the range of 480 nm to less than 520 nm, a second fluorescent material having a peak light-emitting wavelength in the range of 520 nm to less than 600 nm, and a third fluorescent material having a peak light-emitting wavelength in the range of 600 nm to 670 nm. The light-emitting device has a ratio of an effective radiant intensity for melatonin secretion suppression to an effective radiant intensity for blue-light retinal damage of 1.53 to 1.70 when the light-emitting device emits light with a correlated color temperature of 2700 K to less than 3500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 3500 K to less than 4500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 4500 K to less than 5700 K; and 1.35 to 1.65 when the light-emitting device emits light with a correlated color temperature of 5700 K to 7200 K.

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：US20200313045A1

公开(公告)日：2020-10-01

申请号：US16833487

申请日：2020-03-27

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI ,  Kazushige FUJIO

IPC: H01L33/50 ,  H01L25/075

Abstract: A light emitting device includes a first light source containing a first light emitting element, and a second light source containing a second light emitting element and a second fluorescent material, the first light source emits light in a region that is demarcated in a chromaticity diagram of the CIE 1931 color coordinate system by a first straight line connecting a first point having x,y of 0.280,0.070 in the chromaticity coordinate and a second point having x,y of 0.280,0.500 in the chromaticity coordinate, a second straight line connecting the second point and a third point having x,y of 0.013,0.500 in the chromaticity coordinate, a purple boundary extending from the first point toward a direction in which x decreases in the chromaticity coordinate, and a spectrum locus extending from the third point toward a direction in which y decreases in the chromaticity coordinate, in a light emission spectrum, a light emission intensity ratio IPM/IPL of a light emission intensity IPM at a wavelength of 490 nm with respect to a light emission intensity IPL at a maximum light emission peak wavelength of the first light emitting element is in a range of 0.22 or more and 0.95 or less, the second light source emits light having a color deviation duv from a blackbody radiation locus in a range of −0.02 or more and 0.02 or less measured according to JIS Z8725 with a correlated color temperature in a range of 1,500 K or more and 8,000 K or less in a chromaticity diagram of the CIE 1931 color coordinate system, and the light emitting device emits mixed color light of light emitted from the first light source and light emitted from the second light source.

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：US20220223764A1

公开(公告)日：2022-07-14

申请号：US17657756

申请日：2022-04-03

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI ,  Kazushige FUJIO

IPC: H01L33/50 ,  H01L25/075

Abstract: A light emitting device includes a first light source containing a first light emitting element, and a second light source containing a second light emitting element and a second fluorescent material, the first light source emits light in a region that is demarcated in a chromaticity diagram of the CIE 1931 color coordinate system by a first straight line connecting a first point having x,y of 0.280, 0.070 in the chromaticity coordinate and a second point having x,y of 0.280, 0.500 in the chromaticity coordinate, a second straight line connecting the second point and a third point having x,y of 0.013, 0.500 in the chromaticity coordinate, a purple boundary extending from the first point toward a direction in which x decreases in the chromaticity coordinate, and a spectrum locus extending from the third point toward a direction in which y decreases in the chromaticity coordinate, in a light emission spectrum, a light emission intensity ratio IPM/IPL of a light emission intensity IPM at a wavelength of 490 nm with respect to a light emission intensity IPL at a maximum light emission peak wavelength of the first light emitting element is in a range of 0.22 or more and 0.95 or less, the second light source emits light having a color deviation duv from a blackbody radiation locus in a range of −0.02 or more and 0.02 or less measured according to JIS Z8725 with a correlated color temperature in a range of 1,500 K or more and 8,000 K or less in a chromaticity diagram of the CIE 1931 color coordinate system, and the light emitting device emits mixed color light of light emitted from the first light source and light emitted from the second light source.

公开(公告)号：US20200287098A1

公开(公告)日：2020-09-10

申请号：US16880532

申请日：2020-05-21

Applicant: NICHIA CORPORATION

Inventor： Mika AMIYA ,  Kazushige FUJIO ,  Sadakazu WAKUI

IPC: H01L33/50 ,  A01G7/04 ,  H01L25/075

Abstract: A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm or more and 490 nm or less, and a red fluorescent material which is excited by the light from the light emitting element to emit light having at least one light emission peak wavelength in a range of 580 nm or more and 680 nm or less, wherein a ratio of the photon flux R of red light in a range of 620 nm or more and 700 nm or less to the photon flux B of blue light in a range of 400 nm or more and 490 nm or less, R/B, is in a range of more than 20 and 200 or less.