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Title:
VARIABLE LIGHT DISTRIBUTION HEADLIGHT
Document Type and Number:
Japanese Patent JP2008066190
Kind Code:
A
Abstract:

To solve a problem that, in a conventional projector type headlight, an amount of movement of a shade gets large in order to effect a low-beam light distribution and a running light distribution in switching, and accordingly, a mechanism for moving the shade takes a large space.

A major axis X of an elliptic system reflective face 2 is arranged in a vertical direction with a light source at an upper part, and at the same time, a light axis Y of a projection lens 3 is made to cross the major axis X in the vicinity of a second focus of the elliptic system reflective face, while, a main reflective face and a sub reflective face are provided which are movable and capable of varying irradiation directions against reflective light from the elliptic system reflective face crossing at a crossing point of the major axis and the light axis, so that, by moving the sub reflective face alone, a low-beam light distribution can be obtained with a small movement volume, realizing large-scale downsizing of a movement mechanism.


Inventors:
YAMAMOTO TSUTOMU
Application Number:
JP2006244327A
Publication Date:
March 21, 2008
Filing Date:
September 08, 2006
Export Citation:
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Assignee:
STANLEY ELECTRIC CO LTD
International Classes:
F21S8/10; F21S8/12; F21V7/16; F21V13/00; F21V14/04; F21W101/10; F21Y101/00
Attorney, Agent or Firm:
Teruo Akimoto



 
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