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:
Nov. 23, 2004
Filed:
Oct. 09, 2002
Other;
Abstract
A conventional projector headlamp has low efficiency because an amount of light is shaded almost half by a shutter for a low-beam light distribution. In addition, only a projection lens is seen in the installed condition, inviting old-fashioned designs disadvantageously. In a projector headlamp ( ) of the invention, a vertical section passing through the center of a projection lens ( ) includes a convex front surface and a flat rear surface ( ). A line connecting the upper end to the lower end on the rear surface ( ) is tilted to the vertical. Thus, the projection lens ( ) has a prismatic action for directing the entire light downward. This is effective to reduce an amount of light to be shaded by a shutter ( ) and provide improved brightness and novel designed appearances.