Patent ID: 8251532

Claim:
A back light module, comprising: a reflector; at least two light sources disposed above the reflector, the two light sources including a first light source configured to emit a first light ray and a second light source configured to emit a second light ray; at least one partition disposed at a substantially central location between the two light sources and substantially perpendicular to a line connecting the two light sources; a back plate supporting the reflector and the light sources thereon, wherein the reflector includes at least one opening, a lower end of the partition passes through the opening and is connected to a top surface of the back plate, and the lower end of the partition has an L-shaped structure; and an optical film disposed above the at least one partition, wherein the partition is a plate having a uniform thickness of 0.3 millimeters at most and including a first surface configured to reflect the first light ray and a second surface configured to reflect the second light ray, a first angle between the first light ray and the first surface is equal to a second angle between the second light ray and the second surface, and an upper end of the partition is disposed adjacent to the optical film, forming a gap smaller than or equal to 5 millimeters therebetween.