公开(公告)号：US09977290B2

公开(公告)日：2018-05-22

申请号：US14907870

申请日：2014-07-24

Applicant: Sharp Kabushiki Kaisha

Inventor： Isamu Miyake ,  Koichi Miyachi ,  Hiroaki Asagi

IPC: G02F1/1337 ,  C09D179/08

CPC classification number: G02F1/133788 ,  C09D179/08 ,  G02F1/133711

Abstract: The present invention provides a method for manufacturing a liquid crystal display device including a photo-alignment film and capable of sufficiently improving the display quality. The method for manufacturing a liquid crystal display device of the present invention is a method for manufacturing a liquid crystal display device including a photo-alignment film. The method for manufacturing a liquid crystal display device successively includes a step (1) of forming on a substrate a film from a photo-alignment-film material that contains a solvent, a polymer including a photo-functional group that is capable of causing at least one chemical reaction selected from the group consisting of photodimerization, photoisomerization, and photo-Fries rearrangement, and a polymer including a polyamic acid backbone and free from the photo-functional group; a step (2) of pre-heating the film to evaporate the solvent; a step (3) of irradiating the pre-heated film with polarized light; and a step (4) of main-heating the polarized-light-irradiated film. The liquid crystal display device is of an in-plane switching mode or a fringe field switching mode in each of which a pre-tilt angle is substantially 0°.

公开(公告)号：US09817277B2

公开(公告)日：2017-11-14

申请号：US14361352

申请日：2012-11-09

Applicant: Sharp Kabushiki Kaisha

Inventor： Shinichi Hirato ,  Isamu Miyake

IPC: G02F1/1339 ,  G02F1/1337

CPC classification number: G02F1/13392 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/133788 ,  G02F1/1339 ,  G02F1/13394 ,  G02F2001/13373 ,  G02F2001/133738 ,  G02F2001/13396

Abstract: The present invention provides a liquid crystal display device including a horizontal alignment type liquid crystal layer, sub spacers, and a photo-alignment film, wherein the liquid crystal display device can suppress the occurrence of a disclination. The present invention relates to a liquid crystal display device including: a pair of substrates facing each other; and a horizontal alignment type liquid crystal layer interposed between the pair of substrates, wherein at least one of the pair of substrates includes a photo-alignment film, one of the pair of substrates includes multiple sub spacers, the multiple sub spacers are not in contact with the facing substrate under atmospheric pressure, and each of the multiple sub spacers is formed such that its thickness in a cross section monotonically increases and then monotonically decreases from one end to another end of the sub spacer.

公开(公告)号：US09690141B2

公开(公告)日：2017-06-27

申请号：US14731485

申请日：2015-06-05

Applicant: Sharp Kabushiki Kaisha

Inventor： Koichi Miyachi ,  Isamu Miyake

IPC: G02F1/1337

CPC classification number: G02F1/133788 ,  G02F1/133711 ,  G02F1/1368 ,  G02F2001/133738

Abstract: The present invention provides a method for manufacturing a liquid crystal display device, which hardly causes display unevenness in joining parts in which mutually neighboring exposure regions are overlapped upon carrying out a photo-alignment treatment for forming a horizontal alignment film. The method for manufacturing a liquid crystal display device of the present invention includes a step of forming a horizontal alignment film by carrying out a photo-alignment treatment of irradiating a photo-alignment film material applied to at least one substrate of a pair of substrates with polarized light, wherein the photo-alignment treatment is carried out by exposure to a plurality of regions of one substrate surface; two neighboring regions among the plurality of regions to be exposed include an overlapped part; an irradiation amount of the polarized light to the overlapped part is gradually lowered in one of the two neighboring regions toward the other of the two neighboring regions; and the overlapped part of the two neighboring regions has a width of 20 mm or wider.