Title :
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
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;
Conference_Titel :
Electrets, 1996. (ISE 9), 9th International Symposium on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-2695-4
DOI :
10.1109/ISE.1996.578187
