Photoalignment of Liquid Crystal Molecules
Using Fluorine-Containing Polyimides
18
Shuichi Sato, Hironaga Matsumoto, Setsuko Matsumoto, and
Kazukiyo Nagai
Contents
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
Photoalignment of Liquid Crystal Molecules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
Substituent Effect of Fluorine-Containing Polyimide on Photoalignment of LC Molecules . . . 496
Photoreactivity of 6FDA-TeMPD Polyimide Prepared with Various Film Preparation
Protocols as an LC Photoalignment Film . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504
Photoalignment Characteristics of CT Complex-Type Polyimides with Tetramethyl
Phenylene Diamine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 512
Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521
Abstract
Liquid crystal (LC) alignment methods are very important for manufacturing
liquid crystal displays (LCDs). The photoalignment method in which polyimide
films are radiated with linearly polarized ultraviolet (LPUV) light is one of the
most effective non-rubbing processes to solve problems such as electrostatic
charge and dust accumulation. This entry presents a review on photoalignment
S. Sato
Department of Electrical and Electronic Engineering, Tokyo Denki University, Adachi-ku, Tokyo,
Japan
H. Matsumoto
Department of Electronics and Bioinformatics, Meiji University, Kawasaki, Kanagawa, Japan
S. Matsumoto
Department of Physics, Meiji University, Kawasaki, Kanagawa, Japan
K. Nagai (*)
Department of Applied Chemistry, Meiji University, Kawasaki, Kanagawa, Japan
e-mail: nagai@meiji.ac.jp; nagai@isc.meiji.ac.jp
© Springer Nature Switzerland AG 2020
L. Zhu, C. Y. Li (eds.), Liquid Crystalline Polymers, Polymers and Polymeric
Composites: A Reference Series, https://doi.org/10.1007/978-3-030-43350-5_68
493
Using Fluorine-Containing Polyimides
18
Shuichi Sato, Hironaga Matsumoto, Setsuko Matsumoto, and
Kazukiyo Nagai
Contents
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
Photoalignment of Liquid Crystal Molecules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
Substituent Effect of Fluorine-Containing Polyimide on Photoalignment of LC Molecules . . . 496
Photoreactivity of 6FDA-TeMPD Polyimide Prepared with Various Film Preparation
Protocols as an LC Photoalignment Film . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504
Photoalignment Characteristics of CT Complex-Type Polyimides with Tetramethyl
Phenylene Diamine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 512
Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521
Abstract
Liquid crystal (LC) alignment methods are very important for manufacturing
liquid crystal displays (LCDs). The photoalignment method in which polyimide
films are radiated with linearly polarized ultraviolet (LPUV) light is one of the
most effective non-rubbing processes to solve problems such as electrostatic
charge and dust accumulation. This entry presents a review on photoalignment
S. Sato
Department of Electrical and Electronic Engineering, Tokyo Denki University, Adachi-ku, Tokyo,
Japan
H. Matsumoto
Department of Electronics and Bioinformatics, Meiji University, Kawasaki, Kanagawa, Japan
S. Matsumoto
Department of Physics, Meiji University, Kawasaki, Kanagawa, Japan
K. Nagai (*)
Department of Applied Chemistry, Meiji University, Kawasaki, Kanagawa, Japan
e-mail: nagai@meiji.ac.jp; nagai@isc.meiji.ac.jp
© Springer Nature Switzerland AG 2020
L. Zhu, C. Y. Li (eds.), Liquid Crystalline Polymers, Polymers and Polymeric
Composites: A Reference Series, https://doi.org/10.1007/978-3-030-43350-5_68
493