| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet having a plurality of light guide plate patterns, each light guide plate pattern having an input surface for receiving light from a light source, a micro-patterned output surface for emitting light, and a micro-patterned bottom surface opposing to the output surface. <P>SOLUTION: An optical sheet 300a is made by extruding a first resin 450a into a nip between a first pressure roller 478a and a first patterned roller 480a to form a first layer 410a, the first layer having an unpatterned surface and a patterned surface, by conveying the first layer into a nip between a second patterned roller 480b and a second pressure roller 478b, and by extruding a second resin 450b into the nip to form a second layer 410b on the unpatterned surface of the first layer 410a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
