LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

摘要

An IPS type liquid crystal display device superior in mass productivity and improved in image quality with a higher contrast ratio by decreasing the occurrence of defective display due to the disorder of the initial liquid crystal alignment by the liquid orientation control film and realizing stable alignment of liquid crystals comprises: a pair of substrates, at least one which is transparent; a liquid crystal layer disposed between the pair of substrates; a group of electrodes formed on at least one of the pair of substrates to apply an electric field to the liquid crystal layer; plural active elements connected to the group of electrodes; and an orientation control film disposed on at least one of the pair of substrates, wherein said orientation control film is made of a photosensitive polyimide and a polyamide acid ester and is given orientation control ability by being irradiated with substantially linearly polarized light.

主权项

1. A liquid crystal display device comprising:
a pair of substrates, at least one of which is transparent; a liquid crystal layer disposed between the pair of substrates; a group of electrodes formed on at least one of the pair of substrates to apply an electric field to the liquid crystal layer; plural active elements connected to the group of electrodes; and a photo sensitive orientation control film for liquid crystal disposed on at least one of the pair of substrates; wherein said photo sensitive orientation control film is made of a polyimide, a first compound, and a second compound; wherein the first compound contains a polymer unit given by the following formula (102), (103), (113), (114), (116), or (117); wherein the second compound contains a polymer unit given by the following formula (102), (103), (113), (114), (116), (117), (121), or (122) wherein the cyclobutane section is replaced with a section given by at least one of the following formulae (51) through (55): wherein each R1 is individually hydrogen or an alkyl group containing 1 to 8 carbon atoms, each R2 is individually a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a phenyl group, an alkyl group containing 1 to 6 carbon atoms, an alkoxy group containing 1 to 6 carbon atoms, a vinyl group (—(CH2)m-CH═CH2, m=0, 1, 2), or an alkynyl group (—(CH2)m-C≡CH, m=0, 1, 2), and Ar is an aromatic compound; wherein each R1 is individually hydrogen or an alkyl group containing 1 to 8 carbon atoms, each R2 is individually a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a phenyl group, an alkyl group containing 1 to 6 carbon atoms, an alkoxy group containing 1 to 6 carbon atoms, a vinyl group (—(CH2)m-CH═CH2, m=0, 1, 2), or an alkynyl group (—(CH2)m-C≡CH, m=0, 1, 2), and Ar is an aromatic compound; wherein each R1 is individually an alkyl group containing 1 to 8 carbon atoms, each R2 is individually a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a phenyl group, an alkyl group containing 1 to 6 carbon atoms, an alkoxy group containing 1 to 6 carbon atoms, a vinyl group (—(CH2)m-CH═CH2, m=0, 1, 2), or an alkynyl group (—(CH2)m-C≡CH, m=0, 1, 2), and Ar is an aromatic compound; wherein each R2 is individually a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a phenyl group, an alkyl group containing 1 to 6 carbon atoms, an alkoxy group containing 1 to 6 carbon atoms, a vinyl group (—(CH2)m-CH═CH2, m=0, 1, 2), or an alkynyl group (—(CH2)m-C≡CH, m=0, 1, 2), and Ar is an aromatic compound; wherein: each hydrogen atom of the aromatic rings individually may instead be a fluorine atom, a chlorine atom, a bromine atom, a phenyl group, an alkyl group containing 1 to 8 carbon atoms, an alkoxy group, a vinyl group, or an alkynyl group; and Z is any of the following functional groups, (—CH2—, —CO2—, —NH—, —O—, —S—, —SO—, —SO2—), wherein each hydrogen atom may instead be a fluorine atom, a chlorine atom, a bromine atom, a phenyl group, an alkyl group containing 1 to 8 carbon atoms, an alkoxy group, a vinyl group or an alkynyl group.