| 摘要 |
This light guide plate (10) is provided with a light-guiding member (20) having a light incidence surface (22) and main surfaces (24a, 24b), and protrusions (30a, 30b) formed on at least one of the main surfaces (24a, 24b). When viewed from the normal line direction of main surface (24a), the distance between the light incidence surface (22) and protrusion (30b) is greater than the distance between the light incidence surface (22) and protrusion (30a). The protrusions (30a, 30b) have a shape in which the length of each protrusion (30a, 30b) along the orthogonal direction (Q) which is orthogonal to the propagation direction (P) of light entered from the light incidence surface (22) monotonically increases along the propagation direction (P). The minimum value of the length of protrusion (30b) along the orthogonal direction (Q) is larger than the maximum value of the length of protrusion (30a) in the orthogonal direction (Q). |
