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:
Feb. 20, 2007
Filed:
Aug. 12, 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
A first layer having a refractive index higher than that of a light transparent substrate is formed on the light transparent substrate, and a second layer having a refractive index higher than that of the first layer is formed on the first layer, and an electrode layer having a refractive index higher than that of the second layer is formed on the second layer in accordance with the present invention. By means of this configuration, a spherical-wave-shaped wavefront emitted from a point light source of an emission layer of a light-emitting device to all directions, is converted to a plane-wave-shaped wavefront within the substrate, which allows the light to be effectively emitted outside the substrate, so that a light-emitting device substrate having good light extraction efficiency and a light-emitting device using the same may be provided.