Light diffuser for a liquid crystal display device and manufacturing method thereof

A liquid crystal display device, comprising:

• a front substrate;
• a rear substrate sealed together with said front substrate with a gap therebetween;
• a liquid crystal material filled in said gap between said front substrate and said rear substrate;
• a front polarizing plate on a surface of said front substrate;
• a rear polarizing plate on a surface of said rear substrate;
• a light diffusing means for diffusing light, said light diffusing means being between said front substrate and said front polarizing plate, said light diffusing means including at least two resin layers;
• a plurality of fine transparent particles in at least one of said at least two resin layers;
• a directional backlight at a rear side of said liquid crystal cell to provide parallel light to said liquid crystal cell
• wherein said at least one resin layer having said plurality of fine transparent particles is of a different refractive index than another of said resin layers.

A liquid crystal display device, comprising:

• a front substrate;
• a rear substrate sealed together with said front substrate with a gap therebetween;
• a liquid crystal material filled in said gap between said front substrate and said rear substrate;
• a front polarizing plate on a surface of said front substrate;
• a rear polarizing plate on a surface of said rear substrate;
• a light diffusing means for diffusing light, said light diffusing means being between said front substrate and said front polarizing plate, said light diffusing means including at least two resin layers;
• a plurality of fine transparent particles in at least one of said at least two resin layers;
• a directional backlight at a rear side of said liquid crystal cell to provide parallel light to said liquid crystal cell
• wherein said at least one resin layer having said plurality of fine transparent particles is of a refractive index substantially identical to a refractive index of said fine transparent particles.

A liquid crystal display device, comprising:

• a front substrate;
• a rear substrate sealed together with said front substrate with a gap therebetween;
• a liquid crystal material filled in said gap between said front substrate and said rear substrate;
• a front polarizing plate on a surface of said front substrate;
• a rear polarizing plate on a surface of said rear substrate;
• a light diffusing means for diffusing light, said light diffusing means being between said front substrate and said front polarizing plate, said light diffusing means including at least two resin layers;
• a plurality of fine transparent particles in at least one of said at least two resin layers;
• a directional backlight at a rear side of said liquid crystal cell to provide parallel light to said liquid crystal cell
• wherein said at least two resin layers are three resin layers, a middle one of said three resin layers having said fine transparent particles.

A liquid crystal display device, comprising:

• a front substrate;
• a rear substrate sealed together with said front substrate with a gap therebetween;
• a liquid crystal material filled in said gap between said front substrate and said rear substrate;
• a front polarizing plate on a surface of said front substrate;
• a rear polarizing plate on a surface of said rear substrate;
• a light diffusing means for diffusing light, said light diffusing means being between said front substrate and said front polarizing plate, said light diffusing means including at least two resin layers;
• a plurality of fine transparent particles in at least one of said at least two resin layers;
• a directional backlight at a rear side of said liquid crystal cell to provide parallel light to said liquid crystal cell
• wherein said at least two resin layers are three resin layers, two outer ones of said three resin layers having said fine transparent particles.

A light diffuser for a display device, comprising:

• a panel of transparent material having first and second major surfaces;
• a first resin layer of a first refractive index on said first major surface of said panel;
• a plurality of microbeads in said first resin, said microbeads being at least two layers deep on said first major surface;
• and
• a second resin layer of a second refractive index on said first major surface of said panel, said first and second refractive indexes being mutually different.