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：US12163633B2

公开(公告)日：2024-12-10

申请号：US18576054

申请日：2022-02-22

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：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.