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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Chen, SHSubject: search.filters.subject.liquid crystal

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Now showing 1 - 4 of 4
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    Item type:Item,
    Suppression of the hysteresis in a homeotropic aligned ferroelectric liquid crystal film
    (1997-04-01)
    Chen, CY
    ;
    Chen, SH
    ;
    光電工程研究所
    ;
    Institute of EO Enginerring
    We investigated electro-optical effects in a homeotropic-aligned ferroelectric liquid crystal film. Hysteresis was observed in this cell. The width of the hysteresis could be suppressed by appropriate adjustment of external parameters in the experiment and the unwinding electric Geld could be reduced by rubbing of the substrate. The rewinding electric field could Le increased by making the cell thicker.
  • Thumbnail Image
    Item type:Item,
    Anomalous capacitance bounces and bumps of liquid crystal cells in DC electric fields
    (2000-04-01)
    Chen, PL
    ;
    Chen, SH
    ;
    光電工程學系
    ;
    Department of Photonics
    We have studied the time response of the capacitance of nematic liquid crystal cells by applying electric fields. When AC fields are applied, the capacitance exhibited a normal behavior: it first increased monotonically with time, and then reached a saturating value, With sufficient high DC fields, capacitance bounces and bumps were observed during the rising time for 100-mu m thick cells with low and high impurity concentrations, respectively. We believe that these anomalous capacitance characteristics of liquid crystal cells are resulted from the coupling effects between induced polarization from liquid crystal molecules and space-charge polarization from fast ions.
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    Item type:Item,
    Rubbing-induced molecular alignment on a rubbed alkyl-branched polyimide film
    (1995)
    Huang, JY
    ;
    Li, JS
    ;
    Chen, SH
    ;
    交大名義發表
    ;
    光電工程學系
    Rubbing-induced molecular alignment on an alkyl-branched polyimide film with varying unidirectional rubbing strength has been investigated with the use of optical phase retardation measurement, atomic force microscopy (AFM), and second-harmonic generation (SHG). Our AFM images suggest that the rubbing-induced micro-groove should play a minor role in aligning liquid crystal (LC) molecules. The polar angle of the polar head group of a LC monolayer on an alkyl-branched polyimide film was found to vary with the rubbing strength. The results obtained from various experimental techniques can be reconciled with a simple molecular model proposed in this paper.
  • Thumbnail Image
    Item type:Item,
    Suppression of the hysteresis in a homeotropic aligned ferroelectric liquid crystal film
    (1997-04-01)
    Chen, CY
    ;
    Chen, SH
    ;
    交大名義發表
    ;
    光電工程學系
    ;
    National Chiao Tung University
    We investigated electro-optical effects in a homeotropic-aligned ferroelectric liquid crystal film. Hysteresis was observed in this cell. The width of the hysteresis could be suppressed by appropriate adjustment of external parameters in the experiment and the unwinding electric Geld could be reduced by rubbing of the substrate. The rewinding electric field could Le increased by making the cell thicker.