Patent ID: 7029158

Claim:
A hollow backlight module, comprising: a first light guide plate having a first inner surface and a first outer surface; a second light guide plate having a second inner surface and a second outer surface, the first and second inner surfaces being inner concave curvature surfaces, and the second light guide plate and the first light guide plate forming a hollow light-guiding zone therebetween; two light sources located at two sides of the hollow light-guiding zone, light from the two light sources transmitting into the hollow light-guiding zone, and then entering the first and the second light guide plates through the first and the second inner surfaces; a reflecting plate located below the second outer surface of the second light guide plate to reflect the light emitting from the second light guide plate to the second light guide plate and to enter again into the hollow light-guiding zone; and a diffusing film located above the first outer surface of the first light guide plate for diffusing the light emitting from the first light guide plate and producing uniform light output.