Patent ID: 7817361

Claim:
A method of manufacturing a beam direction control element having transparent areas and light absorption areas alternately arranged on a surface of a substrate, wherein said light absorption areas function as a louver for controlling direction of a beam of light, said method comprising: disposing an optically transparent material on a first transparent substrate to form transparent ridges which constitute the transparent areas; filling curable and photo-absorptive fluid in gaps between said transparent ridges; curing the fluid to form the light absorption areas; and laminating a second translucent substrate in close contact with said transparent ridges on said transparent ridge, wherein said second translucent substrate is one of a color filter and a polarizing film, wherein the formation of transparent ridges comprises: coating an optically transparent and photo-curing material on said first substrate in a thickness in accordance with said transparent ridges to form a transparent layer; and patterning said transparent layer by a photolithography process using a photomask corresponding to said transparent ridges to form the transparent ridges made of the cured photo-curing material on said first substrate, and wherein said filling of the fluid includes coating the fluid on said first substrate including said transparent ridges.