Patent ID: 8619204

Claim:
A liquid crystal shutter having a stack structure in which a pair of liquid crystal devices are stacked, the pair of liquid crystal devices having a pair of substrates on which alignment films are coated and a liquid crystal material injected into the pair of substrates; a polarizer formed on one of two principal planes of said stack structure; and an analyzer formed on the other principal plane of said stack structure, wherein a light transmission axis of said polarizer is intersected with a light transmission axis of said analyzer, wherein an alignment film coated on a substrate adjacent to another liquid crystal device of said pair of substrate of each of the liquid crystal devices is a horizontal alignment film and an alignment film coated on the other substrate is a vertical alignment film, wherein alignment treatment is performed on the horizontal alignment film of the liquid crystal device having said polarizer of said stack structure in a direction parallel to the light transmission axis of said analyzer and alignment treatment is performed on the horizontal alignment film of the liquid crystal device having the analyzer of said stack structure in a direction parallel to the light transmission axis of said polarizer, and wherein liquid crystal materials of the liquid crystal devices have a positive dielectric anisotropy and have twisting directions that are the reverse of each other.