| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate used as a backlight in which the incident light is diffused efficiently and surface emission light is generated with enhanced luminance and little unevenness. <P>SOLUTION: The light guide plate 2 is molded by pressing a dot stamper having a projection part formed by drilling in order four circular cone holes by a drill, of which the processing part at top end is a cone shape, on the surface of a metal base plate, on the rear face 21 of a transparent resin base material 20, and is provided with four slanted surfaces 16 which spread from the bottom 25 in the center toward the rear face 21 of the light guide plate 2 with the bottom 25 as a center, and consist of a part of cone faces of curved-shape in a plan view and ridge lines 27 which are located at the boundary between the mutually adjoining slanted surfaces 16 out of the four slanted surfaces 16 and of which the plan view is a straight line and the vertical cross-section is a curved shape. <P>COPYRIGHT: (C)2012,JPO&INPIT |
