Patent ID: 8120718
Filing Date: 2012-02-21
Classification: G02B

Abstract:
1. A parallax barrier device comprising a pair of transparent-electrode substrates each provided with a transparent electrode, wherein a barrier light-shielding part and a light-transmitting part are formed in a gap between the pair of transparent-electrode substrates, a liquid crystal layer is formed in the barrier light-shielding part, and a resin layer having the property of transmitting light and not serving as a liquid crystal layer is formed in the light-transmitting part, the liquid crystal layer is a liquid crystal layer exhibiting homeotropic alignment and containing a liquid crystal material whose dielectric-constant anisotropy is negative, and the liquid crystal layer has a retardation of ½ of the wavelength of light entering the liquid crystal layer under application of a voltage; and wherein the barrier light-shielding part is configured to change a polarization state of light entering the liquid crystal layer according to a distribution state of liquid crystal molecules so that a polarization state of light which has passed through the liquid crystal layer differs from a polarization state of light which has passed through the resin layer having the property of transmitting light.