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:
Apr. 11, 2017
Filed:
Feb. 13, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Yasuhisa Inada, Osaka, JP;
Taku Hirasawa, Kyoto, JP;
Yoshitaka Nakamura, Osaka, JP;
Akira Hashiya, Osaka, JP;
Mitsuru Nitta, Osaka, JP;
Takeyuki Yamaki, Nara, JP;
Abstract
A light-emitting device includes a photoluminescent layer that emits light containing first light, a light-transmissive layer located on or near the photoluminescent layer, a low-refractive-index layer and a high-refractive-index layer. A submicron structure is defined on the photoluminescent layer and/or the light-transmissive layer. The low-refractive-index layer is located on or near the photoluminescent layer so that the photoluminescent layer is located between the low-refractive-index layer and light-transmissive layer. The high-refractive-index layer is located on or near the low-refractive-index layer so that the low-refractive-index layer is located between the high-refractive-index layer and the photoluminescent layer. The submicron structure includes at least projections or recesses and satisfies the following relationship:λ<λwhere Dis the center-to-center distance between adjacent projections or recesses, λis the wavelength of the first light in air, and nis the refractive index of the photoluminescent layer for the first light.