Patent ID: 7534022

Claim:
A backlight module comprising: a light box having a light exit side; a plurality of light guide tubes disposed in said light box, each of said light guide tubes having a plurality of microstructures which are spaced apart along a length of a corresponding one of said light guide tubes, said microstructures being placed substantially in a matrix array within said light box; and a plurality of light sources, each of which emits a light beam to a corresponding one of said light guide tubes, said microstructures dispersing the light beams from said light guide tubes, wherein said light sources include a plurality of red light emitting diodes, a plurality of blue light emitting diodes, and a plurality of green light emitting diodes. said light guide tubes being arranged in a plurality of groups, each of said groups having three of said light guide tubes which receive the light beams from one of said red light emitting diodes, one of said blue light emitting diodes and one of said green light emitting diodes, respectively, wherein each of said microstructures of each of said light guide tubes in each of said groups cooperates with an adjacent one of said microstructures of each of the other two of said light guide tubes in the same one of said groups to form a microstructure unit that produces a mixed white light, and wherein said light guide tubes in each of said groups are juxtaposed coplanarly to each other in a direction substantially parallel to said light exit side of said light box, each of said groups of said light guide tubes being spaced apart from other ones of said groups of said light guide tubes.