The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 2022
Filed:
Jan. 18, 2021
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Nobuaki Nagao, Gifu, JP;
Taku Hirasawa, Kyoto, JP;
Yasuhisa Inada, Osaka, JP;
Mitsuru Nitta, Osaka, JP;
Akira Hashiya, Osaka, JP;
Yasuhiko Adachi, Hyogo, JP;
Abstract
A light-emitting apparatus includes; a light-emitting device including a photoluminescent layer that receives excitation light and emits light including first light having a wavelength λin air, and a light-transmissive layer located on or near the photoluminescent layer; and an optical fiber that receives the light from the photoluminescent layer at one end of the optical fiber and emits the received light from the other end thereof. A surface structure is defined on at least one of the photoluminescent layer and the light-transmissive layer, and the surface structure has projections or recesses or both and limits a directional angle of the first light having the wavelength λin air.