| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a surface light source for preventing deterioration of brightness in a surface, and emitting light at uniform or desired brightness distribution in the surface by reinforcing an adhesive force of a light guide plate and an irregular light reflection pattern.SOLUTION: A light reflective powder layer 22 is provided on a surface of a substrate film 21, and an ink layer 23 that is made of adhesive and translucent ink and on which an irregular light reflection pattern is formed, is provided on a surface of the light reflective powder layer 22, so as to form a light reflection sheet 2 with an irregular light reflection pattern. Then, a translucent light guide plate 1 is adhered to a surface of the ink layer, and a light source 4 is provided on a side face of the light guide plate 1. A light diffusion plate 3, a light diffusion sheet (not shown) or the like is provided on a light emission face of the light guide plate 1.</p> |
