Patent ID: 9690141
Date: 2017-06-27
CPC Classifications: G02F

Claim:
1. A method for manufacturing a liquid crystal display device comprising: forming a horizontal alignment film by performing a photo-alignment treatment of irradiating a photo-alignment film material applied to at least one substrate of a pair of substrates with a plurality of polarized light sources; wherein the plurality of polarized light sources includes a first light source and a second light source; the photo-alignment treatment is performed by scanning the at least one substrate of the pair of substrates and the plurality of polarized light sources and exposing a substrate surface of the at least one substrate of the pair of substrates to polarized light applied from a direction perpendicular to the substrate surface; the horizontal alignment film includes a first region which is exposed with the polarized light applied by the first light source and a second region which is exposed with the polarized light applied by the second light source; a direction in which the first light source moves relatively to the at least one substrate of the pair of substrates in the photo-alignment treatment for the first region is defined as a first scan direction of the first light source, and a direction in which the second light source moves relatively to the at least one substrate of the pair of substrates in the photo-alignment treatment for the second region of the second light source is defined as a second scan direction, the first scan direction of the first light source is identical to the second scan direction of the second light source; the second region includes an overlapping portion which overlaps with the first region; and the liquid crystal display device has an In-Plane Switching alignment mode or a Fringe Switching alignment mode; and wherein the first light source and the second light source are adjacent to each other while scanning the photo-alignment treatment, and exposing the first region with the polarized light by the first light source is performed simultaneously with exposing the second region with the polarized light by the second light source.