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:
Aug. 05, 2003
Filed:
Jul. 02, 2001
Kyoto Denkiki Co., Ltd., Uji, JP;
Abstract
The present invention relates to a linear lighting system with a linear light source. According to the invention, all the effective light around the optical axis emitted from the linear light source is introduced to a concave reflector so that the illumination is carried out only with the reflected light. The reflected light is controlled to be a converging or parallel beam of light so that a desired area is illuminated and the luminance is increased. In a mode of the invention, a cylindrical concave reflector whose section taken vertical to a linear light source is a part of an ellipse having a first focus F at the linear light source and a second focus F at an irradiation plane (irradiation target point). The part of the ellipse covers an effective emission angle 2&thgr; of the linear light source and a reflected light produced at the part from a light within the effective emission angle 2&thgr; is free of obstruction by the linear light source In another mode, the cylindrical concave reflector is a part of a parabola having a focus at the linear light source The part of the parabola covers an effective emission angle 2&thgr; of the linear light source and a reflected light produced at the part from a light within the effective emission angle 2&thgr; is free of obstruction by the linear light source