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. 16, 2003
Filed:
Oct. 16, 2000
Joon-Sik Choi, Seoul, KR;
Hyung-Joo Kang, Kyoungki-Do, KR;
Hyo-Sik Jeon, Kyoungki-Do, KR;
Han-Seok Kim, Seoul, KR;
Yong-Seog Jeon, Seoul, KR;
Gennady (Inakh) Bukhman, Kiev, UA;
LG Electronics Inc., Seoul, KR;
Abstract
The present invention relates to a light guide capable of transferring light from an illuminating apparatus to a certain distant destination. The light guide includes a light source, and a hollow guide unit extended from the light source and having a transparent lateral surface. The present invention provides a pipe shaped light guide having a cross section of an epicycloidal curve for enhancing power and a light emitting characteristic. In the present invention, light is transmitted using a light transmitting material or a prism at a portion of a cross section of the epicycloidal curve, and a reflection plate formed of a high reflection ratio is installed at the remaining portions of the cross section of the same. In addition, an expensive lens or prism is not used in the present invention thereby decreasing fabrication cost. It is possible to provide a high efficiency light guide. In particular, it is possible to improve illumination and energy efficiency characteristics by changing the type of the epicycloid or changing an optical parameter of a material which forms the wall surface of the light guide.