| 摘要 |
PROBLEM TO BE SOLVED: To secure satisfactory visibility by preventing the luminance of light emitted through a light transmission body from decreasing. SOLUTION: In the light transmission body, a first incident plane 27b, on which the light emitted from a first light emitting diode 17 is made incident, a second incident plane 26a, on which the light emitted from a second light emitting diode 18, is made incident a reflection plane 27a, on which the light made incident from the first incident plane is reflected, and a light-emitting surface 24a, from which the light made incident from the first or second incident plane is emitted, are formed, thus an optical path between the second light emitting diode and the light-emitting surface is made into optical path in the form of one straight line. |
