| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily obtain desired luminance with high light convergence efficiency without increasing the weight of a light guide body itself. <P>SOLUTION: The light guide body 5 comprises: a light guide-in part 8 which has an end surface 11 having a plurality of lens means 10 facing a plurality of LEDs 2 respectively to make lights from the LEDs 2 incident as parallel lights and a slant side face 7 formed slantwise (tilt angle θ1) to reflect an arriving parallel light L1 among the incident parallel lights L1 at an angle θ2 of incidence less than a critical angle and is formed in a conic shape including the end surface 11 as its base surface; and a light guide part 9 which is extended long having circular section at the vertex side of the light guide-in part 8 and guides the parallel light L1 and a reflected light L2 lengthwise. <P>COPYRIGHT: (C)2003,JPO |
