| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of widening a view angle in a first direction and narrowing a view angle in a second direction perpendicular to the first direction.SOLUTION: A light guide plate 2 includes: a first prism row that is disposed on a light emission surface 22 of the light guide plate 2, and of which each prism has an apex angle of a first angle; and a second prism row that is disposed on a light incidence surface 21 of the light guide plate 2, and of which each prism has an apex angle of a second angle. Also, the light guide plate 2 includes at least one of a projection structure 23a disposed on an anti-light emission surface 23 and having a projection shape, and a recess structure 23b disposed on the anti-light emission surface 23 and having a recess shape.SELECTED DRAWING: Figure 6 |
