| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a light guide sheet by which the light guide sheet realizing the upgrading of the uniformity of an amount of emitted light can be manufactured with high yield. SOLUTION: In the method for manufacturing the light guide sheet of such a structure that light is guided into the interior through one side end face from a light source and the light is emitted from one main face, a gate width WG in a connected part 18 between a gate 15 and a light guide sheet 16 is formed almost equally to the width WL of the light guide sheet at the connected part 18, in the step to manufacture a sheet-like molding material 17 comprising the gate 15 and the light guide sheet 16 integrally formed with the gate 15 by injection molding. |
