| 摘要 |
This invention has an object to provide a manufacturing method for light guide plate capable of accommodating to arbitrary shapes as well as to optical characteristics suitable to the shapes during the production of a variety of kinds in a small quantity, even where the light guide plate is relatively large in size used for such as signs or guide display boards, and also capable of grossly reducing the takt time during the production. The invented manufacturing method for light guide plate is a manufacturing method for light guide plate for guiding light incoming from a side surface of a light guide plate substrate and guiding the light outgoing from a major surface thereof, the manufacturing method comprising the steps of: arranging fabrication dots in a matrix shape at a rectangular distal surface of a ultrasonic fabrication horn; forming, on a major surface of the light guide plate substrate, reflection dots corresponding to the fabrication dots on the distal surface upon pressing the distal surface of the ultrasonic fabrication horn to the major surface of the light guide plate substrate; and forming the reflection dots in a prescribed range on the major surface of the light guide plate substrate by repeating formation of the reflection dot upon correlative movement of the ultrasonic fabrication horn within the major surface with respect to the light guide plate substrate. |
