中国物理B ›› 2008, Vol. 17 ›› Issue (3): 950-953.doi: 10.1088/1674-1056/17/3/034

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Novel cell parameter determination of a twisted-nematic liquid crystal display

付国柱1, 黄霞2, 荆海2   

  1. (1)Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences; North Liquid Crystal Engineering Research and Development Center, Changchun rm 130033, China; (2)Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences; North Liquid Crystal Engineering Research and Development Center, Changchun rm 130033, China；Graduate School of the Chinese Academy of Sciences, Beijing 100049, Chin
  • 收稿日期:2007-05-12 修回日期:2007-08-20 出版日期:2008-03-04 发布日期:2008-03-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60576056).

Novel cell parameter determination of a twisted-nematic liquid crystal display

Huang Xia(黄霞)a)b)†, Jing Hai(荆海)a)b), and Fu Guo-Zhu(付国柱)a)   

  1. a Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences; North Liquid Crystal Engineering Research and Development Center, Changchun rm 130033, China; b Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2007-05-12 Revised:2007-08-20 Online:2008-03-04 Published:2008-03-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60576056).

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摘要： In this paper a novel method is proposed to determine the cell parameters including the twist angle, optic retardation and rubbing direction of twisted-nematic liquid crystal displays (TNLCD) by rotating the TNLCD. It is a single-wavelength method. Because using subtraction equation of transmittance as curve fitting equation, the influence of the light from environment and the absorption by polarizer, the sample of TNLCD and analyser on the transmittance is eliminated. Accurate results can also be obtained in imperfect darkness. By large numbers of experiments, we found that not only the experimental setup is quite simple and can be easily adopted to be carried out, but also the results are accurate.

关键词: liquid crystal display, twist angle, optical retardation, rubbing direction

Abstract: In this paper a novel method is proposed to determine the cell parameters including the twist angle, optic retardation and rubbing direction of twisted-nematic liquid crystal displays (TNLCD) by rotating the TNLCD. It is a single-wavelength method. Because using subtraction equation of transmittance as curve fitting equation, the influence of the light from environment and the absorption by polarizer, the sample of TNLCD and analyser on the transmittance is eliminated. Accurate results can also be obtained in imperfect darkness. By large numbers of experiments, we found that not only the experimental setup is quite simple and can be easily adopted to be carried out, but also the results are accurate.

Key words: liquid crystal display, twist angle, optical retardation, rubbing direction

中图分类号:  (Liquid crystals)

  • 42.70.Df
42.25.Bs (Wave propagation, transmission and absorption) 42.25.Ja (Polarization) 42.72.-g (Optical sources and standards) 42.79.Ci (Filters, zone plates, and polarizers)