| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting fixture for a vehicle using as a light source a light-emitting diode in which a light-emitting chip is arranged on an optical axis, in which luminance distribution of a conventional light-emitting diode that luminance is rapidly deteriorated as aperture angle from the optical axis becomes large is improved. <P>SOLUTION: A curved part 14aA is formed in front of a sealing member 14, and the cross-section shape along a horizontal plane including its optical axis Ax is constructed of a waveform curve in which a concave curve C1 is arranged in the vicinity of the optical axis Ax and a convex curve C2 is arranged on the both sides. Thereby, in the horizontal plane including the optical axis Ax, out of emitting light from the light-emitting chip 12, the light going in a direction with a small aperture angle of right and left direction from the optical axis Ax is made to reach the portion of the concave curve C1 and is emitted frontward as diffusion light in the direction separating from the optical axis Ax by the light diffusion action, and the light going in the direction with a large aperture angle is made to reach the portion of the convex curve C2 and is emitted frontward as deflected light to the straight line L direction making an aperture angle θ by the light convergence action. <P>COPYRIGHT: (C)2011,JPO&INPIT |
