综述了薄膜晶体管驱动液晶显示器(TFT-LCD)用聚酰亚胺(PI)取向层的研究应用进展以及未来发展趋势。从TFT-LCD对PI液晶取向层的性能需求、PI液晶取向层的分子结构设计与研究开发现状以及PI液晶取向层在TFT-LCD中的实际应用等方面进行了阐述,重点介绍了摩擦型PI液晶取向层以及光控型PI液晶取向层的研究与应用进展。
Recent progress of research,applications and future developing trends of polyimides (PI) alignment layers for thin film transistor driven liquid crystal display (TFT-LCD) devices was reviewed.Several aspects,including the property requirements of TFT-LCD for PI alignments layers,molecular design,research and development (R&D) status for PI alignment layers,and the practical applications of PI alignment layers in TFT-LCD fabrications were mainly introduced.Particularly,the R&D of two types of PI alignment layers,including rubbing alignment layers and photoalignment layers were emphatically presented.
[1] Katayama M.TFT-LCD technology[J].Thin Solid Films,1999,341(1/2):140-147.
[2] Liu C T.Revolution of the TFT LCD technology[J].Journal of Display Technology,2007,3(4):342-350.
[3] Chiu P H,Li W Y,Chen Z H,et al.Roll TFT-LCD with 20R curvature using optically compensated colorless polyimide substrate[J].SID Symposium Digest of Technical Papers,2016:47(1):15-17.
[4] Tyagi A,Chatterjee D S.Liquid crystal display:enviroment & technology[J].International Journal of Environmental Engineering Science and Technology Research,2013,1(7):110-123.
[5] Takatoh K,Sakamoto M,Hasegawa R,et al.Alignment technology and applications of liquid crystal devices[M].New York:Taylor & Francis,2005.
[6] Toney M F,Ressell T P,Logan J A,et al.Near-surface alignment of polymers in rubbed films[J].Nature,1995,374:709-711.
[7] Lee T R,Kim J H,Lee S H,et al.Investigation on newly designed low resistivity polyimide-type alignment layer for reducing DC image sticking of in-plane switching liquid crystal display[J].Liquid Crystals,2017,44(4):738-747.
[8] Yeung F S Y,Ho Y L J,Li Y W,et al.Liquid crystal alignment layer with controllable anchoring energies[J].Journal of Display Technology,2008,4(1):24-27.
[9] Momoi Y,Sato U,Koda T,et al.Surface rheology of rubbed polyimide film in liquid crystal display[J].Optical Mater Express,2014,4(5):1057-1066.
[10] Aerle N A J M,Tol A J W.Molecular orientation in rubbed polyimide alignment layers used for liquid-crystal displays[J].Macromolecules,1994,27(22):6520-6526.
[11] Kim J H,Rosenblatt C.Temperature effect on a rubbed polyimide layer[J].Journal of Applied Physics,2000,87(1):155-158.
[12] Chigrinov V G,Kozenkov V M,Kwok H S.Photoalignment of liquid crystalline materials:physics and applications[M].West Sussex:John Wiley & Sons,2008.
[13] Chrzanowski M M,Zielinski J,Olifierczuk,et al.Photoalignment-an alternative aligning technique for liquid crystal displays[J].Journal of Achievements in Materials Manufacturing Engineering,2011,48(1):7-13.
[14] Ibn-Elhaj M,Chappellet S,Lincker F.Rolic LCMO photo alignment technology:mechanism and applications to large LCD panels[J].Solid State Phenomena,2012,181-182:3-13.
[15] Miyachi K,Kobayashi K.The world's first photo alignment LCD technology applied to generation ten factory[J].SID Symposium Digest of Technical Papers,2010,41(1):579-582.
[16] Miyake I,Asagi H,Shimizu M.Photo-alignment and n-FFS LCD technologies with IGZO-TFT applied to generation eight factory[J].SID Symposium Digest of Technical Papers,2016,47(1):592-595.
[17] Kim D H,Lim Y J,Kim D E,et al.Past,present,and future of fringe-field switching-liquid crystal display[J].Journal of Information Display,2014,15(2):99-106.
[18] Melik H,Emek M,Yilmaz S.Molecular alignment on polyimide film for liquid crystal by the application of photolithography[J].Cankaya University Journal of Science and Engineering,2011,8(1):99-109.
[19] Atkuri H M,Leong E S P,Hwang G,et al.Developing novel liquid crystal technologies for display and photonic applications[J].Displays,2015,36:21-29.
[20] Nishikawa M.Design of polyimides for liquid crystal alignment films[J].Polymers for Advanced Technologies,2000,11(8-12):404-412.
[21] Nishikawa M,West J L,Reznikov Y,et al.Effect of chemical structures of polyimides on photosensitivity of liquid crystal alignment using a polarized UV exposure[J].Liquid Crystals,1999,26(4):575-580.
[22] Lin C S,Shih S J,Lu A T,et al.The quality improvement of PI coating process of TFT-LCD panels with taguchi methods[J].Optik,2012,123(8):703-710.
[23] Jaw J H,Li H A,Liu S F,et al.Study of polyimide film alignment via ink-jet printing and ion-beam processing[J].SID Symposium Digest of Technical Papers,2005,36(1):776-779.
[24] Usami K,Sakamoto K,Ushioda S.Cyclobutane ring cleavage of CBDA-ODA polyimide molecules induced by linearly polarized UV light[J].Molecular Crystals and Liquid Crystals,2001,368(1):453-460.
[25] Matsui C,Kunimatsu N,Sonoda H.Liquid crystal display device:US,8497002[P].2013-06-30.
[26] Kim D G,Lee WQ K,Ahn H J,et al.Effect of surface anisotropy of a rubbed polyimide film on liquid crystal alignment properties[J].SID Symposium Digest of Technical Papers,2009,40(1):1641-1643.
[27] Chiou D R,Chen L J,Lee C D.Pretilt angle of liquid crystals and liquid-crystal alignment on microgrooved polyimide surfaces fabricated by soft embossing method[J].Chemistry of Materials,2006,22(22):9403-9408.
[28] Hasegawa M,Taira Y.Nematic homogeneous photoalignment by polyimide exposure to linearly polarized UV[J].Journal of Photopolymer Science and Technology,1995,8(2):241-248.
[29] Chigrinov V G,Kwok H S,Takada H,et al.Liquid crystal photoalignment:history and future[J].Proceedings of SPIE,2007,6487:64870.
[30] Sakamoto K,Usami K,Kikegawa M,et al.Alignment of polyamic acid molecules containing azobenzene in the backbone structure:effects of polarized ultraviolet light irradiation and subsequent thermal imidization[J].Journal of Applied Physics,2003,93(2):1039-1043.
[31] Koide N,Mihara T.Photocrosslinked film of polymers having chalconyl moiety and their alignment capability for liquid crystal materials[J].Proceedings of SPIE,2003,5003:63-72.
[32] Kim H J,Yi M H,Shin D M.Photo-alignment using a photo-decomposition polyimide and effect of reactive monomers[J].Molecular Crystals and Liquid Crystals,2012,567(1):110-116.
[33] Yang B N,Shin D M.Photo-alignment using benzophenone sensitized photodecomposition of the polyimide[J].Molecular Crystals and Liquid Crystals,2014,599(1):118-124.
[34] Lee S W,Park S Y,Shin D M.Synthesis and photo-alignment properties of novel polyimides with cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA)[J].Molecular Crystals and Liquid Crystals,2015,620(1):159-165.
[35] Li X,Zhong Z,Lee S H,et al.New photoalignment polymeric materials with excellent photosensitivity and stability[J].SID Symposium Digest of Technical Papers,2004,35(1)1213-1215.
基金资助
北京高等学校高水平人才交叉培养“实培计划”项目;中国地质大学(北京)基本科研业务费(2652017345)