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:
Feb. 24, 2004
Filed:
Oct. 11, 2001
Masahito Naganawa, Shizuoka, JP;
Tomoyuki Moritani, Shizuoka, JP;
Akinori Matsumoto, Shizuoka, JP;
Takayuki Iwaki, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
In a headlamp having a single filament bulb or discharge bulb, there is provided a movable shade that can appear from a reflection mirror located above the single filament bulb. In a usual condition, the movable shade is pulled at the back of the reflection mirror located above the single filament bulb. Then, a light emitted from the single filament bulb is condensed by the reflection mirror and irradiates a very long distance thereby to make a high-speed traveling possible. On the contrary, when it is rainy or foggy, the movable shade is protruded in the front of the reflection mirror. Then, a part of a light emitted from the single filament bulb is shielded by the movable shade, and the road surface in 20-40 m front of the vehicle is darkened thereby to reduce surface reflection from the road surface.