Patent ID: 9217925
Filing Date: 2015-12-22
Classification: G02B,G02F,G03F,H04N,Y10T

Abstract:
1. A method for producing a pattern phase difference film by sequentially processing an elongated transparent film material while transporting the elongated transparent film material, comprising: forming a photo-alignment material film on the transparent film material; forming an alignment film by performing an exposure process on the photo-alignment material film by using a mask through a photo-alignment method, wherein a distance between the mask and the photo-alignment material film is set to be 150 μm or more and 650 μm or less; and forming a phase difference layer of a right-eye area applying phase difference corresponding to right-eye transmitting light and a left-eye area applying phase difference corresponding to left-eye transmitting light on the alignment film, wherein, in the exposure process, the alignment film is formed by selectively exposing the photo-alignment material film by using the mask in a first exposure process, and after that, exposing the non-exposed area in the first exposure process by irradiating the entire surface with light in a second exposure process, and thus the photo-alignment material film of the portion corresponding to the right-eye area or the left-eye area is aligned, and after that, the photo-alignment material film of the portion corresponding to the left-eye area or the right-eye area is aligned, and wherein the mask is formed so that a slit width of the mask is smaller than an area width of the areas used for the first exposure process.