| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate making outgoing light vertically go out without attaching other optical elements, and a back light module using the light guide plate. <P>SOLUTION: This light guide plate includes an entrance plane, an outgoing plane, and a reflecting surface equipped with a reflecting film. The reflecting surface has a plurality of V-shaped micro-structural portions projecting to the outside from the light guide plate and having identical angles, its vertical angle is 40 to 95°, and first and second bottom angles formed on a plane where the reflecting surface is positioned are 70 to 90°, and 15 to 50° respectively. A part of light from a light source enters into the entrance plane, and the light is emitted along the direction perpendicular to the outgoing plane by reflecting action of the V-shaped micro-structural portions of the reflecting surface. In addition, the back light module using this light guide plate makes a system compact, enhances performance, and reduces a cost, in comparison with a light guide plate and a back light module by conventional technology. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
