Patent ID: 8568013

Claim:
A backlight module, comprising: a light guide plate, having: a first surface, having a visual area; a second surface, opposite to the first surface; a light incident surface, connecting the first surface and the second surface; a first curved convex surface, connecting the first surface and the second surface; a first plane, connecting the first surface and the second surface, and connecting the first curved convex surface and the light incident surface; a second curved convex surface, connecting the first surface and the second surface; and a second plane, connecting the first surface and the second surface, and connecting the second curved convex surface and the light incident surface, wherein the light incident surface connects the first plane and the second plane, a distance between the visual area and a first end of the first curved convex surface connected to the first plane is greater than a distance between the visual area and a second end of the first curved convex surface apart from the first plane, and a distance between the visual area and a third end of the second curved convex surface connected to the second plane is greater than a distance between the visual area and a fourth end of the second curved convex surface apart from the second plane; and a light emitting unit, disposed beside the light incident surface, and capable of emitting a light beam, wherein the light beam is capable of entering the light guide plate through the light incident surface, and is capable of being transmitted out of the light guide plate through the visual area of the first surface.