| 摘要 |
<P>PROBLEM TO BE SOLVED: To raise the utilization efficiency of the luminous flux of a light source by attaining the thinning of a lighting fixture, and making an oblong light distribution pattern with little light distribution unevenness into possibility of forming in a vehicle head-lighting device of projector type equipped with a mirror member. <P>SOLUTION: A light source 12a is located on the position where a distance L from a center position A to the backside focus F of the projection lens 18 serves as values smaller than the focal length f of the projection lens 18. This miniaturizes a first reflector 14, enlarges the solid angle of the reflecting surface 14a to the light source 12a, and raises the utilization efficiency of the luminous flux of the light source. Although the reversal projection image of the light source 12a becomes large at this time, the light source 1a is constituted as a segment light source prolonged in the vehicle widthwise direction, and the oblong light distribution pattern is maintained. Moreover, an aperture 14b is formed in the rear part of the first reflector 14, the 2nd and 3rd reflectors 24 and 26 are provided on the back side. The light from the light source 12a is reflected toward the forward direction without making the projection lens 18 penetrate, and the effective use of the luminous flux of the light source is intended. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
