Parallax barrier device for viewing three-dimensional images, method for fabricating the same and display apparatus including a parallax barrier device
A parallax barrier device includes a pair of transparent-electrode substrates each provided with a transparent electrode. 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. A resin layer having the property of transmitting light is formed in the light-transmitting part. The barrier light-shielding part separates light for a first image viewed from a first direction and light for a second image viewed from a second direction different from the first direction. The light-transmitting part transmits the light for the first image and the light for the second image.
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.
2. 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,
a pair of polarizers sandwiching the pair of transparent-electrode substrates therebetween; and
an optical retardation plate having a retardation of ½ of the wavelength of incident light and placed in a gap between at least one of the pair of transparent-electrode substrates and at least one of the polarizers opposing said at least one of the pair of transparent-electrode substrates, wherein the directions of transmission easy axes of the pair of polarizers are approximately orthogonal to each other; 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.
3. The parallax barrier device of claim 1 or 2 , wherein the resin layer is a negative resist for a spacer.