公开(公告)号：USRE50041E1

公开(公告)日：2024-07-16

申请号：US17364359

申请日：2021-06-30

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Taku Hirasawa ,  Yasuhisa Inada ,  Akira Hashiya ,  Nobuaki Nagao ,  Akira Tsujimoto

IPC: F21V9/30 ,  F21K9/64 ,  F21V5/04 ,  F21V5/10 ,  F21V7/30 ,  F21V9/40 ,  F21V13/14 ,  H01S5/00 ,  F21Y115/10 ,  F21Y115/30

CPC classification number: F21K9/64 ,  F21V5/04 ,  F21V5/10 ,  F21V7/30 ,  F21V9/40 ,  F21V13/14 ,  H01S5/00 ,  F21Y2115/10 ,  F21Y2115/30

Abstract: A light-emitting apparatus includes an excitation light source that emits first light; a light-emitting device on an optical path of the first light, the light-emitting device emitting second light having a wavelength in air; and a first converging lens on an optical path of the second light. The light-emitting device comprises: a photoluminescent layer that emits the second light by being excited by the first light; and a light-transmissive layer on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a surface structure comprising projections or recesses arranged perpendicular to a thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction, the second light emitted from the light emitting surface. The surface structure limits the directional angle of the second light emittied from the light emitting surface.

公开(公告)号：US10359155B2

公开(公告)日：2019-07-23

申请号：US15206273

申请日：2016-07-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Taku Hirasawa ,  Yasuhisa Inada ,  Akira Hashiya ,  Nobuaki Nagao ,  Akira Tsujimoto

IPC: F21V9/30 ,  F21K9/64 ,  H01S5/00 ,  F21V5/04 ,  F21Y115/10 ,  F21Y115/30

Abstract: A light-emitting apparatus includes an excitation light source that emits first light; a light-emitting device on an optical path of the first light, the light-emitting device emitting second light having a wavelength in air; and a first converging lens on an optical path of the second light. The light-emitting device comprises: a photoluminescent layer that emits the second light by being excited by the first light; and a light-transmissive layer on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a surface structure comprising projections or recesses arranged perpendicular to a thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction, the second light emitted from the light emitting surface. The surface structure limits the directional angle of the second light emittied from the light emitting surface.