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)
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
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.
Received: 12 May 2007
Revised: 20 August 2007
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of
China (Grant No 60576056).
Cite this article:
Huang Xia(黄霞), Jing Hai(荆海), and Fu Guo-Zhu(付国柱) Novel cell parameter determination of a twisted-nematic liquid crystal display 2008 Chin. Phys. B 17 950
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