Multi-layered light diffusion plate and liquid crystal display device comprising the same

A liquid crystal display comprising:

• a liquid crystal panel;
• and
• a direct backlight unit that is placed behind the liquid crystal panel, the direct backlight unit comprising a light source, a multi-layered light diffusion plate, and an optical sheet comprising a prism sheet;
• wherein the multi-layered light diffusion plate comprises a coextruded transparent layer and a light diffusion layer,
• wherein the transparent layer comprises an amorphous transparent thermoplastic resin and has a thickness from 1.5 mm to 2.5 mm,
• wherein the light diffusion layer comprises 80 to 99.9 parts by weight of an amorphous transparent thermoplastic resin and 0.1 to 20 parts by weight of transparent particles, and has a thickness from 50 μm to 500 μm,
• wherein the multi-layered light diffusion plate has substantially flat surfaces, wherein the liquid crystal panel, the multi-layered light diffusion plate and the light source are installed such that light generated from the light source can pass through the multi-layered light diffusion plate and the optical sheet comprising the prism sheet and be transmitted toward the liquid crystal panel,
• wherein:
• (a) the transparent particles are organic particles made from one or more selected from the group consisting of a polymethyl(meth)acrylate resin, a methyl(meth)acrylate-styrene copolymer resin, a polystyrene resin and a silicon resin;
• (b) the transparent layer does not comprise the transparent particles;
• (c) the multi-layered light diffusion plate has a total light transmissivity of 70% or more;
• and
• (d) the multi-layered light diffusion plate is a three-layered structure comprising an intermediate layer formed of the transparent layer, an uppermost layer formed of the light diffusion layer, and a lowermost layer formed of the light diffusion layer.