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:
Sep. 21, 2004
Filed:
Mar. 01, 2001
Tomoko Koyama, Suwa, JP;
Takeo Kaneko, Misato-mura, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light-emitting device includes a substrate and a light-emitting device section. The light-emitting device section includes a light-emitting layer capable of emitting light by electroluminescence, a pair of electrode layers for applying an electric field to the light-emitting layer, an optical section for propagating light generated in the light-emitting layer in a specific direction, and an insulation layer disposed between the pair of electrode layers, having an opening formed in part thereof and can function as a current concentrating layer for specifying a region through which current to be supplied to the light-emitting layer flows via a layer in the opening. The optical section has a defect section which forms photonic bandgaps capable of inhibiting a three-dimensional spontaneous emission, and the energy level of the defect section, caused by the defect, is set to be within a specific emission spectrum. Light generated in the light-emitting layer is emitted with a three-dimensional spontaneous emission being inhibited by the photonic bandgaps.