Alignment of liquid crystal on the polyimide films irradiated by pulsed ultraviolet laser

Author

Luo, Qi ; Hu, Weisheng ; Liu, Ziguo ; Sun, Zhengmhg ; Ming, Naiben

Author_Institution

Lab. of Solid State Microstructures, Nanjing Univ., China

fYear

1996

fDate

25-30 Sep 1996

Firstpage

662

Lastpage

667

Abstract

A technique to achieve highly planar alignment of nematic liquid crystals is presented. Spin-coated polyimide film is irradiated by a pulsed ultraviolet laser to align nematic liquid crystal 5CB. The alignment texture of 5CB was observed by a polarized microscope. 5CB is aligned along the polarized direction of the laser beam and a high order parameter S of 0.85 was achieved. It is expected that this technique will find applications in large-area liquid crystal displays and integrated optics

Keywords

laser beam effects; liquid crystal displays; molecular orientation; nematic liquid crystals; optical microscopy; organic compounds; polymer films; surface energy; texture; 5CB; alignment texture; high order parameter; highly planar alignment; large-area liquid crystal display; nematic liquid crystals; polarized microscope; polyimide films; pulsed ultraviolet laser irradiation; spin-coated polyimide film; Crystal microstructure; Glass; Liquid crystal displays; Liquid crystal polymers; Liquid crystals; Optical films; Optical polarization; Optical pulses; Polyimides; Polymer films;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1996. (ISE 9), 9th International Symposium on

Conference_Location

Shanghai

Print_ISBN

0-7803-2695-4

Type

conf

DOI

10.1109/ISE.1996.578187

Filename

578187