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:
Oct. 17, 2017
Filed:
Apr. 15, 2014
El-seed Corporation, Nagoya-shi, JP;
Tsukasa Kitano, Nagoya, JP;
Midori Mori, Nagoya, JP;
Toshiyuki Kondo, Nagoya, JP;
Atsushi Suzuki, Nagoya, JP;
Koichi Naniwae, Nagoya, JP;
Masaki Ohya, Nagoya, JP;
EL-SEED CORPORATION, Nagoya-Shi, Aichi, JP;
Abstract
An LED element capable of further improving the light extraction efficiency and its manufacturing method are provided. An LED element comprises a semiconductor lamination part that includes a light-emitting layer, a diffractive surface on which light emitted from the light-emitting layer is incident and on which projection parts are formed with a period larger than an optical wavelength of the light and smaller than a coherence length of the light and which reflects the incident light in a plurality of modes according to a Bragg diffraction condition and transmits the incident light in a plurality of modes according to the Bragg diffraction condition, and a reflecting surface that reflects light refracted by the diffractive surface so that the reflected light is incident on the diffractive surface again, wherein the semiconductor lamination part is formed on the diffractive surface without any void around the projection parts and a proportion of a flat part in the diffractive surface is 40% or more in a plan view thereof.