| 摘要 |
A light guide plate ( 10 ) includes a bottom surface ( 11 ), a light incident surface ( 12 ) adjacent to the bottom surface, a light emitting surface ( 13 ) opposite to the bottom surface, and a plurality of V-shaped grooves adjacent to the bottom surface, each of the V-shaped grooves defining two bottom angles (alpha, beta) and a top line ( 101 ), the bottom angles being different. The top line of each V-shaped groove is configured so as to maximize the areas of the interfaces of the V-shaped groove, having regard to the top lines of all the V-shaped grooves also being configured to provide a desired distribution of intensity of light beams that emit from the emitting surface in a desired direction. For example, the configurations of the top lines can be such that a maximum luminance of the light guide plate is at a center region of the light emission surface.
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