| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that, in a conventional configuration, a diffusion film or a prism sheet is provided on the emitting-face side of a light-guide plate, consequently, it prevents thinning, cost reduction, and higher luminance, and also, in a configuration that forms a microprism in a light-guide body, it is difficult to achieve an increase in size. <P>SOLUTION: An emitting face of a light-guide body is formed on a mirror plane. Each prism with an angle of 40-50 degrees with respect to the emitting face is provided on a face opposite to the emitting face. By this, emitting of light with a vertical component to the emitting face is significantly increased. Consequently, it is possible to achieve higher luminance even without using a prism sheet, and also, it allows die manufacture by a conventional machining technique. Further, it is possible to achieve an increase in size by mounting a plurality of light-emitting diodes on the same substrate so as to make it as a light source almost similar to a linear light source. <P>COPYRIGHT: (C)2009,JPO&INPIT |
