Patent ID: 8109665

Claim:
A backlight module, comprising: a reflective chamber comprising: a bottom reflector; a top reflector, disposed opposite to the bottom reflector; at least a light entrance; and a plurality of light emitting openings, disposed on the top reflector; and at least a light source, corresponding to the light entrance; wherein the top reflector having m number of regions, a (n−1)th region is adjacent to a (n)th region, a distance between the (n−1)th region and the light source is shorter than a distance between the (n)th region and the light source, a number of the light emitting openings per unit area in the (n−1)th region is less than a number of the light emitting openings per unit area in the (n)th region, where m is a positive integer greater than or equal to 2, n is a positive integer, and 2≦n≦m.