| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light flux control member formed by injection molding having less adverse effects on light distribution characteristics due to a gate mark while securing thickness of a gate of an injection molding die. <P>SOLUTION: The light flux control member 140 includes a light control emission surface 141 controlling a traveling direction of light emitted from light-emitting elements 130, and a backside 142 positioned on an opposite side of the light control emission surface 141. The light flux control member 140 is formed by injection molding in an overlap gate method or a combination of the overlap gate method and a side gate method. Accordingly, a gate mark 147 remains on the backside 142 of the light flux control member 140 in a way in contact with an outer edge. <P>COPYRIGHT: (C)2013,JPO&INPIT |
