Invention Grant
US08648988B2 Liquid crystal display device comprising an alignment film that includes a first alignment film formed of a precursor of polyamide acid or polyamide acid ester and a second alignment film underlying the first alignment film wherein the first alignment film accounts for between 30% and 60% of the alignment film
有权
液晶显示装置，包括取向膜，该取向膜包括由聚酰胺酸或聚酰胺酸酯的前体形成的第一取向膜和位于第一取向膜下面的第二取向膜，其中第一取向膜占所述第一取向膜的30％至60％ 取向膜
- Patent Title: Liquid crystal display device comprising an alignment film that includes a first alignment film formed of a precursor of polyamide acid or polyamide acid ester and a second alignment film underlying the first alignment film wherein the first alignment film accounts for between 30% and 60% of the alignment film
- Patent Title (中): 液晶显示装置，包括取向膜，该取向膜包括由聚酰胺酸或聚酰胺酸酯的前体形成的第一取向膜和位于第一取向膜下面的第二取向膜，其中第一取向膜占所述第一取向膜的30％至60％ 取向膜
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Application No.: US13028311Application Date: 2011-02-16
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Publication No.: US08648988B2Publication Date: 2014-02-11
- Inventor: Noboru Kunimatsu , Chikae Matsui , Hidehiro Sonoda , Yuko Matsumoto , Shoichi Uchino , Masaki Matsumori , Yasushi Tomioka
- Applicant: Noboru Kunimatsu , Chikae Matsui , Hidehiro Sonoda , Yuko Matsumoto , Shoichi Uchino , Masaki Matsumori , Yasushi Tomioka
- Applicant Address: JP Chiba JP Hyogo-ken
- Assignee: Hitachi Displays, Ltd.,Panasonic Liquid Crystal Display Co., Ltd.
- Current Assignee: Hitachi Displays, Ltd.,Panasonic Liquid Crystal Display Co., Ltd.
- Current Assignee Address: JP Chiba JP Hyogo-ken
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2010-032443 20100217
- Main IPC: G02F1/141
- IPC: G02F1/141 ; G02F1/1337
Abstract:
This invention enables forming a photo-alignment film having a large LC anchoring strength in an IPS type liquid crystal display device. An alignment film is adapted to have a two-layer structure including a photo-alignment film and an alignment film with enhanced film strength. The photo-alignment film is formed of a precursor of polyamide acid ester, 80 percent or more of which is polyamide acid ester including cyclobutane. The alignment film with enhanced film strength is formed of a precursor of polyamide acid. After irradiating the substrate with ultraviolet light for photo-alignment, the substrate is heated. Thus, it is possible to achieve a high LC anchoring strength of the alignment film as the whole for photo-alignment, without degrading the mechanical strength of the alignment film with enhanced film strength.
Public/Granted literature
- US20110199565A1 LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2011-08-18
Information query
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