| 摘要 |
<p>An optical sheet (30) formed by a translucent resin is provided with: a side surface (33) which serves as an entry surface where light transmitted from point-like light sources (22) enters; and an exit surface (31), which is formed in a direction that intersects with the side surface (33), from which planar light exits. Convex sections (35), which extend in the thickness direction of the sheet, are positioned side-by-side on the side surface (33) in the longitudinal direction (Y) of the side surface (33). If the length, in the longitudinal direction of the side surface (33), of a light-emitting region of a point-like light source is denoted as W, the positioning interval (P), in the longitudinal direction of the side surface (33), of the convex sections (35) is set to 0.34W.</p> |
