公开(公告)号：US20210126169A1

公开(公告)日：2021-04-29

申请号：US17139655

申请日：2020-12-31

Applicant: NICHIA CORPORATION

Inventor： Mika AMIYA ,  Shoji HOSOKAWA

IPC: H01L33/50 ,  H01L33/32 ,  H01L25/075

Abstract: Provided is a light emitting device capable of realizing an excellent color rendering property. The light emitting device includes a first light emitting element having a light emission peak wavelength within a range of 400 nm or more and 490 nm or less, a second light emitting element having a different light emission peak wavelength from the first light emitting element within a range of 400 nm or more and 490 nm or less, a first fluorescent material that is excited by at least one of the first light emitting element and the second light emitting element and emits light having a light emission peak wavelength within a range of 500 nm or more and 540 nm or less, and a second fluorescent material that is excited by at least one of the first light emitting element and the second light emitting element and emits light having a light emission peak wavelength within a range of 600 nm or more and 680 nm or less, wherein the first fluorescent material is a Ce-activated aluminate fluorescent material containing Lu, Al, and Ga, and optionally at least one element selected from rare earth elements other than Lu.

公开(公告)号：US20190288165A1

公开(公告)日：2019-09-19

申请号：US16352473

申请日：2019-03-13

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.

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.

公开(公告)号：US20200008363A1

公开(公告)日：2020-01-09

申请号：US16572524

申请日：2019-09-16

Applicant: NICHIA CORPORATION

Inventor： Mika AMIYA ,  Kazushige FUJIO ,  Tomokazu SUZUKI

IPC: A01G7/04 ,  A01G31/00 ,  H01L33/50

Abstract: Provided is a light emitting device that includes a light emitting element having a light emission peak wavelength ranging from 380 nm to 490 nm, and a fluorescent material excited by light from the light emitting element and emitting light having at a light emission peak wavelength ranging from 580 nm or more to less than 680 nm. The light emitting device emits light having a ratio R/B of a photon flux density R to a photon flux density B ranging from 2.0 to 4.0 and a ratio R/FR of the photon flux density R to a photon flux density FR ranging from 0.7 to 13.0, the photon flux density R being in a wavelength range of 620 nm or more and less than 700 nm, the photon flux density B being in a wavelength range of 380 nm or more and 490 nm or less, and the photon flux density FR being in a wavelength range of 700 nm or more and 780 nm or less.

公开(公告)号：US20190198724A1

公开(公告)日：2019-06-27

申请号：US16227791

申请日：2018-12-20

Applicant: NICHIA CORPORATION

Inventor： Mika AMIYA ,  Shoji HOSOKAWA

IPC: H01L33/50 ,  H01L33/32

CPC classification number: H01L33/504 ,  H01L33/32

Abstract: Provided is a light emitting device capable of realizing an excellent color rendering property. The light emitting device includes a first light emitting element having a light emission peak wavelength within a range of 400 nm or more and 490 nm or less, a second light emitting element having a different light emission peak wavelength from the first light emitting element within a range of 400 nm or more and 490 nm or less, a first fluorescent material that is excited by at least one of the first light emitting element and the second light emitting element and emits light having a light emission peak wavelength within a range of 500 nm or more and 540 nm or less, and a second fluorescent material that is excited by at least one of the first light emitting element and the second light emitting element and emits light having a light emission peak wavelength within a range of 600 nm or more and 680 nm or less, wherein the first fluorescent material is a Ce-activated aluminate fluorescent material containing Lu, Al, and Ga, and optionally at least one element selected from rare earth elements other than Lu.

公开(公告)号：US20180000016A1

公开(公告)日：2018-01-04

申请号：US15634401

申请日：2017-06-27

Applicant: NICHIA CORPORATION

Inventor： Mika AMIYA ,  Kazushige FUJIO ,  Tomokazu SUZUKI

IPC: A01G7/04 ,  A01G1/00 ,  A01G31/00 ,  H01L33/50

CPC classification number: A01G7/045 ,  A01G22/00 ,  A01G31/00 ,  H01L33/504 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  Y02P60/149

Abstract: Provided is a light emitting device that includes a light emitting element having a light emission peak wavelength ranging from 380 nm to 490 nm, and a fluorescent material excited by light from the light emitting element and emitting light having at a light emission peak wavelength ranging from 580 nm or more to less than 680 nm. The light emitting device emits light having a ratio R/B of a photon flux density R to a photon flux density B ranging from 2.0 to 4.0 and a ratio R/FR of the photon flux density R to a photon flux density FR ranging from 0.7 to 13.0, the photon flux density R being in a wavelength range of 620 nm or more and less than 700 nm, the photon flux density B being in a wavelength range of 380 nm or more and 490 nm or less, and the photon flux density FR being in a wavelength range of 700 nm or more and 780 nm or less.