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:
Jan. 31, 2006
Filed:
Aug. 28, 2003
Hiroo Oyama, Tokyo, JP;
Hiroo Oyama, Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
In a conventional vehicle headlamp, when improvement in the visibility at the time of turning the vehicle is attempted by turning the light distribution characteristic, if a part of the light is turned, the quantity of light becomes insufficient as a whole, and if the whole light distribution is turned, the visibility straight ahead becomes insufficient. According to the present invention, there is provided a vehicle headlampcomprising: one light source; a first light distribution-forming reflecting surfaceforming a light distribution shape for a diagonally rising portion, and consisting of double reflecting surfaces, that is, a primary reflecting surface which is an elliptic type, and a secondary reflecting surface which is a parabolic type; a second light distribution-forming reflecting surfaceforming a light distribution shape in a wide range below the horizontal line, and consisting of double reflecting surfaces, that is, a primary reflecting surface which is an elliptic type, and a secondary reflecting surface which is a parabolic type; and a third light distribution-forming reflecting surfaceforming a light distribution shape in a narrow range below the horizontal line, wherein at least one of the first light distribution-forming reflecting surface to the third light distribution-forming reflecting surface is rotatable in the horizontal direction. As a result, the turning direction and the direction straight ahead can be illuminated with sufficient quantity of light, to thereby solve the problems.