Invention Grant
- Patent Title: Liquid crystal display device
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Application No.: US16199354Application Date: 2018-11-26
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Publication No.: US10852588B2Publication Date: 2020-12-01
- Inventor: Chikae Matsui , Noboru Kunimatsu , Hidehiro Sonoda
- Applicant: JAPAN DISPLAY INC. , PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
- Applicant Address: JP Tokyo JP Hyogo-ken
- Assignee: JAPAN DISPLAY INC.,PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
- Current Assignee: JAPAN DISPLAY INC.,PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
- Current Assignee Address: JP Tokyo JP Hyogo-ken
- Agency: Michael Best & Friedrich LLP
- Priority: JP2008-235900 20080916
- Main IPC: G02F1/1337
- IPC: G02F1/1337 ; C09K19/56 ; G02F1/1343 ; G02F1/1333

Abstract:
An alignment film is given a 2-layer structure comprising a photoalignment film that is photoalignable and a low-resistivity alignment film whose resistivity is smaller than that of the photoalignment film. The photoalignment film is formed by a polyimide whose precursor is polyamide acid alkyl ester, the number molecular weight of the photoalignment film is large, and the stability of alignment of the photoalignment film by photoalignment is excellent. The low-resistivity alignment film is formed by a polyimide whose precursor is polyamide acid, the number molecular weight of the low-resistivity alignment film is small, and the resistivity of the low-resistivity alignment film is small. The 2-layer structure alignment film can be maintaining an excellent photoalignment characteristic, so DC afterimages can be controlled.
Public/Granted literature
- US20190094628A1 LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2019-03-28
Information query
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