| 主权项 |
1. A backlight module, comprising:
only one light source configured for emitting light rays; and a light guide plate made of transparent material, and comprising:
a main body comprising:
a first side surface;a second side surface;a light incident surface connecting to the first side surface and the second side surface; anda light emitting surface substantially perpendicular to the light incident surface, the light emitting surface comprising a light emitting area and a marginal area surrounding the light emitting area; wherein the marginal area has a light diffusion area adjacent to the light incident surface and the first side surface; an included angle between the light incident surface and the first side surface is obtuse angle, an included angle between the light incident surface and the second side surface is an obtuse angle; anda plurality of protrusions positioned on the light incident surface, and facing the only one light source, the protrusions being configured for diffusing the light rays from the only one light source, and guiding the light rays into the main body, wherein each of the plurality of protrusions comprises two opposite bottom surfaces, an arc-shaped circumferential surface, and a fixing surface opposite to the circumferential surface, both of the circumferential surface and the fixing surface are connected to the two bottom surfaces, the fixing surface is a flat surface, and is positioned on the light incident surface, an intersection of each of the bottom surfaces and the light incident surface is a bottom edge, a period “D” of the plurality of protrusions is a sum of a length of the bottom edge and a distance between each two adjacent protrusions, and 190 μm≦D<280 μm. |
