| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent irregularity from occurring on a surface by adjusting nonuniformity of a reflecting pattern when the reflecting pattern is formed by ultrasonic machining. <P>SOLUTION: A manufacturing method of a light guide plate, in which the light entered from an end face emits from a first main face and a second main face, includes: a first forming process in which the first main face of the light guide plate contacts a horn for an ultrasonic machining having a plurality of processing dots, and a first recessed-part group comprising a plurality of recessed parts corresponding respectively to the shape of the plurality of processing dots deflecting the moving direction of the light entered from the end face is formed; and a second forming process in which the second main face of the light guide plate contacts the horn for an ultrasonic machining having the plurality of processing dots, and a second recessed-part group comprising a plurality of recessed parts corresponding respectively to the shape of the plurality of processing dots deflecting the moving direction of the light entered from the end face is formed. <P>COPYRIGHT: (C)2010,JPO&INPIT |
