• Title/Summary/Keyword: Liquid crystal

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UV-curable liquid crystal for a retarder

  • Hasebe, Hiroshi;Kuwana, Yasuhiro;Nakata, Hidetoshi;Nishiyama, Isa;Takeuchi, Kiyofumi;Takatsu, Haruyoshi
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.159-162
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    • 2009
  • A liquid crystalline monomer is applicable to fabricate a retarder in which various types of alignment are fixed. We have developed the monomer, UV-curable liquid crystal optimized for coating processes. Applications and materials for the retarder are reviewed.

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Lyotropic Chromonic Liquid Crystals: Effects of Additives and Optical Applications

  • Park, H.S.;Tortora, L.;Vasyuta, R.M.;Golovin, A.B.;Augustin, E.;Finotello, D.;Lavrentovich, O.D.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.307-310
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    • 2007
  • We describe effects of ionic and neutral additives on phase and structural behavior of the lyotropic chromonic liquid crystals used in preparation of optical elements such as polarizers and compensators.

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Liquid Crystal Materials and Technologies inside Modern Displays

  • Naemura, Shohei
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.277-282
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    • 2003
  • Computational calculations are now successfully introduced to design liquid crystal molecules for uses in modern active-matrix displays. These material technologies are practically applied to develop novel compounds, enabling formulation of advanced liquid crystal mixtures together with a newly developed mixture purification method. Typical examples of these liquid crystal mixtures are introduced for modern displays in various applications.

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Blue-white Reflective Cholesteric Liquid Crystal Displays by Single Liquid Crystal Layer

  • Choi, Woon-Seop;Lee, Hee-Jeong
    • Transactions on Electrical and Electronic Materials
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    • v.9 no.6
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    • pp.251-254
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    • 2008
  • Blue-white reflective cholesteric liquid crystal display was prepared by a unique method of single liquid crystal layer, the combination of yellow color liquid crystal and blue color backplane. The dopant and host combination of chlolesteric liquid crystal affects the color spectrum. The CIE chromaticity coordinates of blue and white are (0.10, 0.16) and (0.29, 0.30), respectively. The relatively low driving voltages of 32 V for blue-white display are obtained.

Shearing and Electro-optical Properties of Stressed Cholesteric Liquid Crystal Cells

  • Lee, Jung-Min;Kang, Dae-Seung
    • Journal of Information Display
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    • v.11 no.2
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    • pp.91-93
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    • 2010
  • The shearing effects on the electro-optical properties of a stressed cholesteric liquid crystal were investigated. A photopolymer was dispersed in the cholesteric liquid crystal cell. By carefully choosing the mixing ratio between the liquid crystal and the photoreactive monomer, and by applying suitable mechanical shearing on the substrates, a cholesteric liquid crystal display with a low threshold voltage and no alignment layer was demonstrated.

Black-white Reflective Liquid Crystal Display Prepared with Two Color Reflective Layers

  • Choi, Woon-Seop;Kim, Min-Kyu
    • Transactions on Electrical and Electronic Materials
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    • v.10 no.1
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    • pp.20-23
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    • 2009
  • Black-white reflective cholesteric liquid crystal display was prepared with two color liquid crystal layers, the combination of yellow color liquid crystal and blue color liquid crystal. The rubbing of cholesteric liquid crystal panel affects the brightness and color spectrum due to increase the planar domain texture. The CIE chromaticity coordinate of white is (0.31, 0.31).

Single-Layer Color Cholesteric Liquid Crystal Displays

  • Lu, Shin-Ying;Lin, Yu-hui;Chien, Liang-Chy
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.982-985
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    • 2007
  • The authors report methods of fabrication singlelayer color cholesteric liquid crystal displays (CLCDs). A single-layer CLCD has been prepared from a polymerstabilized cholesteric liquid crystal. The unique feature of the polymer stabilization is in that the electrically switched colors preserve high reflectivity. A bistable single-layer CLCD has been prepared by the formation of polymer barrier walls and light-tuned cholesteric pitches to reflect blue, green and red color sub-pixels.

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Vertical Alignment Nematic Liquid Crystal Display with Patterned Electrode Using Positive Liquid Crystal Materials

  • Shin, Hun-Ki;Yoon, Tae-Hoon;Kim, Jae-Chang
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.499-501
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    • 2007
  • We propose a vertical-alignment liquid crystal display with patterned electrodes using a positive dielectric anisotropic liquid crystal. In this structure, the threshold and on-state voltages are reduced compared with previous vertical-alignment configuration with positive liquid crystal.

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Simulation Study of an e-Beam Addressed Liquid Crystal Display for Projection

  • Zhou, Fushan;Yang, Deng-Ke;Molitor, R.J.
    • Journal of Information Display
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    • v.3 no.4
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    • pp.8-12
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    • 2002
  • We have carried out a simulation study on an e-beam addressed liquid crystal projection display in which the liquid crystal is switched by the electric field of the charge, produced by an electron beam, on the surface of the display. We calculated the electric field produced by the surface charge, the liquid crystal director configuration and the profile of the transmitted light. We studied the factors affecting the resolution of the display and the effect of pretilt angle on the performance of the display. The e-beam addressed liquid crystal projection display potentially has the advantages of high resolution and high brightness.

A Study on Entrapment Efficiency of Rosmarinic Acid Using Liquid Crystal Phosphatidylcholin (포스파티딜콜린의 액정형성을 이용한 로즈마린산 포집 효율연구)

  • Kang, Ki-Chun
    • Applied Chemistry for Engineering
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    • v.24 no.2
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    • pp.132-137
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    • 2013
  • The liquid crystal form with phosphatidylcholine contents containing in the hydrogenated lecithin was confirmed. Composition ingredients of the liquid crystal vesicle were phospholipid, ethanol and water and the rosmarinic acid was encapsulated as index material. The mean particle size of the liquid crystal vesicle appeared to form various particles form 480 nm to $3{\mu}m$ depending upon the lipid composition and ultrasonic handling time. The liquid crystal vesicle compared with the liposome showed a very high encapsulation efficiency. The quantity of liquid crystal vesicle increased with respect to the increased quantity of lipid contents in the hydrogenated lecithin. The result from release experiments of the liquid crystal vesicle containing rosmarinic acid showed that the liquid crystal vesicle releases much less than that of liposome.