Title page for etd-0708109-234844


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URN etd-0708109-234844
Author Yi-Jen Chen
Author's Email Address m963050042@student.nsysu.edu.tw
Statistics This thesis had been viewed 5587 times. Download 2112 times.
Department Electro-Optical Engineering
Year 2008
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Modify Surface Charestist to Produce Zigzag-free Surface Stablized Ferroelectric Liquid Crystal Device
Date of Defense 2009-06-29
Page Count 78
Keyword
  • optical texture
  • SSFLC device
  • surface free energy
  • pretilt angle
  • Abstract In our study, we use mixed polyimide method and different rubbing conditions to modify surface characteristics for producing zigzag-free surface stablized ferroelectric liquid crystal(SSFLC) device. We utilize contact angle measuring system to obtain the surface free energy and also use rotating crystal method to measure the pretilt angle. Finally, we observe optical textures of SSFLC device with polarized optical microscope.
      In mixed polyimide experiment, we can approximately provide the pretilt angle between 0° and 90°, and we also demonstrate different pretilt angle is modified by the surface of different surface free energy. In the end of this experiment, we obtain the better optical texture of SSFLC device in 18.3° pretilt angle, but part regions of the texture still possess zigzag defects.
      In different rubbing conditions experiment, when the cumulative number of rub is 2 or 3 times in 0.3mm pile impression, we can produce zigzag-free SSFLC device in different horizontal polyimide alignment materials.
    Advisory Committee
  • Mei-Ying Chang - chair
  • Chi-Huang Lin - co-chair
  • Tsung-Hsien Lin - co-chair
  • Wen-Jun Zheng - advisor
  • Files
  • etd-0708109-234844.pdf
  • indicate access worldwide
    Date of Submission 2009-07-08

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