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:
Mar. 06, 2007
Filed:
Dec. 02, 2004
Satoshi Yamamura, Shizuoka, JP;
Hidetada Tanaka, Shizuoka, JP;
Michio Tsukamoto, Shizuoka, JP;
Noriko Okada, Shizuoka, JP;
Satoshi Yamamura, Shizuoka, JP;
Hidetada Tanaka, Shizuoka, JP;
Michio Tsukamoto, Shizuoka, JP;
Noriko Okada, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A light source bulb is fixedly inserted into a lateral direction to the optical axis Ax at a position below an optical axis Ax. Accordingly, a region lateral to the optical axis Ax on a reflection surface of the reflector can be effectively utilized for light distribution control. Furthermore, a first additional reflector having a reflection surface of substantially-spheroidal shape whose first focal point is at a position coincident with the light source is disposed at a position above the optical axis Ax. A second additional reflectorhaving a reflection surface of a substantially-parabolic vertical cross-sectional profile whose focal point is coincident with a second focal point of the first additional reflector is disposed at a position below the optical axis. As a result, light from the light source is illuminated forward without passing through a projection lens.