Patent ID: 7658502

Claim:
A back light structure of a liquid crystal display device comprising: lamps for supplying light to the liquid crystal panel above the lamps; a reflector under the lamps to reflect light from the lamps; a first micro-lens over the lamps, the first micro-lens having a plurality of concave portions or convex portions, wherein a diffusion material is formed in the concave portions and the convex portions so that the diffusion material is disposed at the outer surface of the first micro-lens, thereby the light from the first micro-lens is propagating in the diffusion material, wherein the first micro-lens is concaved toward to the lamps; and a second micro-lens on the reflector, wherein a plurality of concave portions are formed in the reflector and the lamps are respectively disposed in the concave portions and the concave portions are contained with a transparent material having a different refractive index than air so that the lamps are surrounded by the transparent material, the surface of the transparent material being flat.