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. 24, 2008
Filed:
Jun. 07, 2004
Tomohisa Gotoh, Tokyo, JP;
Noriko Takewaki, Osaka, JP;
Hisanao Tsuge, Tokyo, JP;
Atsushi Kamijo, Tokyo, JP;
Satoru Toguchi, Tokyo, JP;
Tomohisa Gotoh, Tokyo, JP;
Noriko Takewaki, Osaka, JP;
Hisanao Tsuge, Tokyo, JP;
Atsushi Kamijo, Tokyo, JP;
Satoru Toguchi, Tokyo, JP;
Samsung SDI Co., Ltd., Suwon, KR;
Abstract
Provided is a substrate for a light-emitting device having good light emitting efficiency and light-emitting device using the substrate. A light transparent substrateis layered with a first layerhaving a refractive index higher than that of the light transparent substrateand a s second layerhaving a refractive index lower than that of the first layer. The refractive index of the first layeris set to be 1.35 times as high as that of the second layerWith this layer structure, in an emitting layer of the light-emitting device, a wave front of a spherical wave form exited from a point light source in the front direction is converted into that of a plane wave form, and exited outside the substrate at a high efficiency.