| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED unit for constituting a narrow-angle signal light only by installing the unit to the light main body of a normal signal light. SOLUTION: Light distribution control boards 5, 6 and 7 where through-holes 5a, 6a and 7a positioned corresponding to LED lamps 1 are formed are arranged in front of the LED lamps 1. Thus, a light beams toward a direction except an eye field angle is cut and a target light distribution characteristic is obtained. Besides, the light distribution control boards 5, 6 and 7 are used as a means for obtaining a light distribution characteristic so that the normal signal light is installed to the light main body. |
