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:
Oct. 11, 2005
Filed:
Nov. 01, 2002
Michihiko Hayakawa, Shizuoka, JP;
Michio Tsukamoto, Shizuoka, JP;
Michihiko Hayakawa, Shizuoka, JP;
Michio Tsukamoto, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A vehicle headlamp having a projector-type lamp unit that enhances a luminous intensity of a hot zone at the time of high beam irradiation is described. A first additional reflector is provided obliquely left-upward of an optical axis Ax, and a second additional reflector is provided obliquely right-downward of the optical axis Ax, between a reflector and a projection lens. An additional light distribution pattern is formed in a center area of a high beam distribution pattern by reflecting direct light, which has entered the first additional reflector from a light source, obliquely right-downward and then forward by the second additional reflector, at the time of high beam irradiation. A reflective surface of the first additional reflector is formed like an ellipsoid spherical surface having the second focus on the right side with respect to the optical axis A (the second reflector side). This makes the additional light distribution pattern into a pattern with a narrow vertical width, and enhances a luminosity of the hot zone without making a short distance area of a road surface at the front of the vehicle excessively luminous.