| 主权项 |
1. A planar light source, comprising:
a light guide plate having a first surface, a second surface, a bottom surface connected to the first surface and the second surface, a light emitting surface opposite to the bottom surface, a center line, at least one first groove and at least one second groove, wherein the first groove and the second groove are respectively located on the first surface and the second surface, and the first groove and the second groove are respectively located at two sides of the center line of the light guide plate, the center line is located on the light emitting surface, and is perpendicular to the first surface and the second surface and equally divides the light emitting surface, wherein the first groove has a first light incident surface and a first side surface, the second groove has a second light incident surface and a second side surface, and the first light incident surface faces to the second light incident surface, at least one first light source and at least one second light source, respectively disposed in the first groove and the second groove, wherein the first light source is suitable for providing a first light beam entering the light guide plate through the first light incident surface, and the second light source is suitable for providing a second light beam entering the light guide plate through the second light incident surface. |
