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:
Dec. 06, 2011
Filed:
Dec. 08, 2008
Shuichi Ajiki, Tokyo, JP;
Koichi Masuyama, Tokyo, JP;
Naoya Sone, Tokyo, JP;
Sadayuki Konishi, Tokyo, JP;
Yasuo Toko, Tokyo, JP;
Shuichi Ajiki, Tokyo, JP;
Koichi Masuyama, Tokyo, JP;
Naoya Sone, Tokyo, JP;
Sadayuki Konishi, Tokyo, JP;
Yasuo Toko, Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
A vehicle lamp can include a light source unit including a light guide plate with a light emission surface, and a point or line light source opposed to one end face of the light guide plate. The light guide plate can be made of a transparent plate-like material. A convex projection lens can be configured to focus light emitted from the light source unit and project the light forward in a direction of light illumination. The light guide plate can have a prism array on a rear surface thereof extending with a serrated cross section from the one end face to the opposite end face of the light guide plate, and in a direction parallel with the end face. The prism array can include a plurality of prism surfaces, with each prism surface being obliquely formed so that when light enters the light guide plate from the light source side and impinges thereon, a substantial amount of the light can be totally reflected into small angles of incidence to the emission surface. The projection lens can be disposed such that a focus thereof on a light source unit side is located on the light emission surface of the light guide plate.