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. 05, 2011
Filed:
Apr. 18, 2005
Hirokazu Godo, Tokyo, JP;
Hirokazu Godo, Tokyo, JP;
Olympus Corporation, Tokyo, JP;
Abstract
A light emitting device capable of achieving a small exit area, high directivity, and low loss; a manufacturing method thereof; an illumination device using this light emitting device; and a projector are provided. The light emitting devicesinclude an LED (light emitting element), in the form of a rectangular light emitting element, having a light emitting partfor emitting illumination light; a substratefor fixing the LED; a spacerhaving a mirror surfaceA for reflecting the illumination light emitted from the LED; and a tapered rod (columnar light guide unit)having a device-side incident surface (incident surface)A upon which illumination light is incident, tapered-rod side surfacesB serving as total reflection surfaces for totally reflecting illumination light received from the device-side incident surfaceA, and the device-side exit surface (exit surface)C which has a larger area than the device-side incident surfaceA and which emits the illumination light totally reflected at the tapered-rod side surfacesB.