公开(公告)号：US20180067365A1

公开(公告)日：2018-03-08

申请号：US15813029

申请日：2017-11-14

Applicant: LG Display Co., Ltd.

Inventor： SeungRyull PARK ,  HyunJin PARK ,  JinPil KIM ,  Han Jin AHN ,  Hanseok LEE ,  Su-Bin LEE

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/137

CPC classification number: G02F1/133788 ,  G02F1/133723 ,  G02F1/134363 ,  G02F2001/134372 ,  G02F2001/13712 ,  Y10T428/1018 ,  Y10T428/1023

Abstract: Provided is a method of manufacturing new liquid crystal display device according to an embodiment of the present invention. Firstly, an alignment film is formed on a substrate. The alignment film is divided into a first alignment film formed using, as a precursor, liquid-state polyimide that contains a photodecomposition substance and a second alignment film formed using, as a precursor, a polyamic acid that does not contain a photodecomposition substance. UV light is irradiated to the alignment film, and decomposed substances formed by irradiation of the UV light is removed by an at least two-step removing process. By the method of manufacturing a liquid crystal display device according to the exemplary embodiment of the present disclosure, bright spots are minimized in pixels and a brightness of black is lowered, so that a liquid crystal display device with a high contrast ratio can be realized.

公开(公告)号：US20170343864A1

公开(公告)日：2017-11-30

申请号：US15681213

申请日：2017-08-18

Applicant: LG Display Co., Ltd.

Inventor： SeungRyull PARK ,  HyunJin PARK ,  JinPil KIM ,  Han Jin AHN ,  Hanseok LEE ,  Su-Bin LEE

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/137

CPC classification number: G02F1/133788 ,  G02F1/133723 ,  G02F1/134363 ,  G02F2001/134372 ,  G02F2001/13712 ,  Y10T428/1018 ,  Y10T428/1023

Abstract: An alignment film for liquid crystal display device includes a first portion positioned towards to the liquid crystal layer and a second portion positioned away from the liquid crystal layer. The first portion provides improved anchoring force while the second portion exhibits a lower volume resistance than the first portion. Thus, AC image sticking and DC image sticking can be minimized at the same time.