Phase difference layer laminated body for three dimensional liquid crystal display device and manufacturing method thereof

Abstract

A phase difference layer laminated body used in a three-dimensional liquid crystal display device, wherein unit cells are divided into groups for left and right eyes, which are given different degrees of polarization, thereby creating a three-dimensional image, further wherein the phase difference layer laminated body has a base material having orientability, and a phase difference layer made of a liquid crystal material that can form a nematic phase and formed in a pattern with two different portions, and the liquid crystal material in each of two different portions is oriented to have different refractive index anisotropy each other that conforms to the two different degrees of polarization and fixed as it is.

What is claimed: 
     
         1 . A method for manufacturing a phase difference layer laminated body used in a three-dimensional liquid crystal display device, wherein unit cells are divided into groups for left and right eyes, which are given different degrees of polarization, thereby creating a three-dimensional image, characterized by having:
 a base material preparation step of preparing a base material;   an application step of applying a refractive index anisotropic material having an ability of providing refractive index anisotropy on the base material for forming a refractive index anisotropic material layer;   an orientation processing step of performing orientation processing to the refractive index anisotropic material layer so as to form a pattern with two portions oriented in two different directions;   an orientation fixing step of fixing the orientation of the refractive index anisotropic material layer that has undergone the orientation processing in the orientation processing step.   
     
     
         2 . The method for manufacturing a phase difference layer laminated body according to  claim 1 , wherein
 the base material is a base material having orientability, the refractive index anisotropic material is a liquid crystal material that can form a nematic phase, and the orientation processing step is a step of maintaining the refractive index anisotropic material layer in a temperature at which the liquid crystal material transforms into a liquid crystal phase.   
     
     
         3 . The method for manufacturing a phase difference layer laminated body according to  claim 2 , wherein
 the liquid crystal material is a material having at least one of a polymerizable liquid crystal monomer, a polymerizable liquid crystal oligomer, and a polymerizable liquid crystal polymer, and wherein the orientation fixing step is a step of irradiating, with an activating radiation beam, the material having at least one of the polymerizable liquid crystal monomer, the polymerizable liquid crystal oligomer, and the polymerizable liquid crystal polymer for polymerization thereof.   
     
     
         4 . The method for manufacturing a phase difference layer laminated body according to  claim 2 , wherein
 the liquid crystal material is a polymerizable liquid crystal monomer.   
     
     
         5 . The method for manufacturing a phase difference layer laminated body according to  claim 3 , wherein
 the activating radiation beam irradiation step is a step of irradiating the material with the activating radiation beam in a pattern, and wherein the method further comprises a development step of developing unpolymerized portions of the liquid crystal material, after the step of irradiating the material with the activating radiation beam in the pattern.   
     
     
         6 . The method for manufacturing a phase difference layer laminated body according to  claim 2 , wherein
 the base material having orientability is obtained by forming an oriented film on a transparent film.   
     
     
         7 . The method for manufacturing a phase difference layer laminated body according to  claim 3 , wherein
 the oriented film is formed in a pattern with portions that are oriented in two different directions, and wherein the liquid crystal material on the oriented film has refractive index anisotropy that conforms to the two directions of orientation of the oriented film.   
     
     
         8 . The method for manufacturing a phase difference layer laminated body according to  claim 7 , wherein
 the two directions of orientation of the oriented film are 45° and 45° in a counter direction respectively with respect to scanning lines of the three-dimensional liquid crystal display device.   
     
     
         9 . The method for manufacturing a phase difference layer laminated body according to  claim 7 , wherein
 the two directions of orientation of the oriented film are parallel and perpendicular respectively with respect to scanning lines of the three-dimensional liquid crystal display device.   
     
     
         10 . A method of manufacturing an oriented film, comprising:
 a patterning exposure step of exposing a surface of a photo-oriented film through a photo mask to linearly polarized light; and   a second exposure step of exposing portions of the patterned photo-oriented film that were not exposed in the previous patterning exposure step to second linear polarization light having a polarization axis oriented at 90° to a polarization axis of the linear polarization light used in the previous step.   
     
     
         11 . The method of manufacturing an oriented film according to  claim 10 , wherein the photo-oriented film is formed by being applied on an oriented film, the photo mask comprising a light transmitting film formed with a light-shielding pattern comprising light shielding portions and non-light shielding portions, the light transmitting film transmitting light of a photosensitive wavelength of the photo-oriented film, and wherein the method further comprises
 a step of overlapping the photo mask on the oriented film before the patterning exposure step; and   a step of separating the photo mask from the photo-oriented film after the patterning exposure step.   
     
     
         12 . The method of manufacturing an oriented film according to  claim 11 , wherein the light-shielding pattern of the photo mask is formed with light shielding portions and non-light shielding portions alternately and in parallel with an equal width, so that, in the second exposure step, parallel linear exposed portions that correspond to the non-light shielding portions are patterned on the photo-oriented film. 
     
     
         13 . The method of manufacturing an oriented film according to  claim 12 , wherein the light shielding portions and the non-light shielding portions therebetween in the light shielding pattern have the same width, and wherein a sum of a number of stripe light shielding portions and a number of the non-light shielding portions equals to a number of TV scanning lines.