| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lamp unit capable of obtaining a new lighting display having a cubic effect by using one light source. <P>SOLUTION: The lamp unit is provided with an LED light source 20 and a light guide body 22. On a reflection part 36 of the light guide body 22, there are provided a reflection surface 36A integrally formed on a first reflection surface 22B of the light guide body 22, a reflection surface (a sub-reflection surface) 36B for totally reflecting the light totally reflected at the reflection surface 36A, and a reflection surface (a sub-reflection surface) 36C for totally reflecting the light totally-reflected at the reflection surface 36B toward a second reflection surface 22C of the light guide body 22. A reflecting order of the reflection surface 36B and the reflection surface 36C will be reversed according to whether a reflection position on the reflection surface 36A is above or under the connection line 37 between the reflection surface 36B and the reflection surface 36C. Namely, the light totally reflected at the reflection surface 36A is reflected by the reflection surface 36C and the light totally reflected by the reflection surface 36C is reflected by the reflection surface 36B toward the second reflection surface 22C in a horizontal direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
