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http://dx.doi.org/10.3807/JOSK.2014.18.4.395

Fast Switching of Vertically Aligned Liquid Crystals by Low-Temperature Curing of the Polymer Structure  

Park, Byung Wok (Department of Electronics Engineering, Pusan National University)
Oh, Seung-Won (Department of Electronics Engineering, Pusan National University)
Kim, Jung-Wook (Department of Electronics Engineering, Pusan National University)
Yoon, Tae-Hoon (Department of Electronics Engineering, Pusan National University)
Publication Information
Journal of the Optical Society of Korea / v.18, no.4, 2014 , pp. 395-400 More about this Journal
Abstract
We proposed a method for fast turn-off switching of a vertically-aligned liquid crystal cell by low-temperature curing of the polymer structure. We confirmed that the turn-off times of the fabricated cells were reduced significantly as the curing temperature was lowered to $-20^{\circ}C$. We accounted for the effect of low-temperature curing on the turn-off time by using a mathematical model and by observing images obtained via scanning electron microscopy. We also confirmed that low-temperature curing is more effective in reducing the response time when the device is operated at a low temperature.
Keywords
Liquid crystal; Vertical alignment; Curing temperature; Response time;
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1 J.-K. Song, K.-E. Lee, H.-S. Chang, S.-M. Hong, M.-B. Jun, B.-Y. Park, S.-S. Seomun, K.-H. Kim, and S.-S. Kim, "DCCII: Novel method for fast response time in PVA mode," in Proc. SID International Symposium (Washington State Convention and Trade Center, USA, May 2004), pp. 1344-1347.
2 P. J. M. Vanbrabant, N. Dessaud, and J. F. Stromer, "Temperature influence on the dynamics of vertically aligned liquid crystal displays," Appl. Phys. Lett. 92, 091101 (2008).   DOI   ScienceOn
3 C. Y. Xiang, J. X. Guo, X. W. Sun, X. J. Yin, and G. J. Qi, "A fast response, three-electrode liquid crystal device," Jpn. J. Appl. Phys. 42, L763-L765 (2003).   DOI   ScienceOn
4 S. Nagata, E. Takeda, Y. Nanno, T. Kawaguchi, Y. Mino, A. Otsuka, and S. Ishihara, "Capacitively coupled driving of TFT-LCD," in Proc. SID International Symposium (Baltimore Convention Center, USA, May 1989), pp. 242-245.
5 P. Bos, "Fast-switching liquid-crystal effects for displays," Inf. Disp. 23, 20-25 (2007).
6 S.-M. Jung, J.-U. Park, S.-C. Lee, W.-S. Kim, M.-S. Yang, I.-B. Kang, and I.-J. Chung, "A novel polarizer glassestype 3D displays with an active retarder," in Proc. SID International Symposium (Henry B. Gonzalez Convention Center, USA, June 2009), pp. 348-351.
7 S. G. Kim, S. M. Kim, Y. S. Kim, H. K. Lee, S. H. Lee, G.-D. Lee, J.-J. Lyu, and K. H. Kim, "Stabilization of the liquid crystal director in the patterned vertical alignment mode through formation of pretilt angle by reactive mesogen," Appl. Phys. Lett. 90, 261910 (2007).   DOI   ScienceOn
8 Y.-J. Lee, Y.-K. Kim, S. I. Jo, J. S. Gwag, C.-J. Yu, and J.-H. Kim, "Surface-controlled patterned vertical alignment mode with reactive mesogen," Opt. Express 17, 10298- 10303 (2009).   DOI
9 F. Du and S.-T. Wu, "Curing temperature effects on liquid crystal gels," Appl. Phys. Lett. 83, 1310-1312 (2003).   DOI   ScienceOn
10 D.-K. Yang, Y. Cui, H. Nemati, X. Zhou, and A. Moheghi, "Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals," J. Appl. Phys. 114, 243515 (2013).   DOI   ScienceOn
11 C. Y. Huang, R. X. Fung, Y. G. Lin, and C. T. Hsieh, "Fast switching of polymer-stabilized liquid crystal pi cells," Appl. Phys. Lett. 90, 171918 (2007).   DOI   ScienceOn
12 C. Y. Xiang, X. W. Sun, and X. Y. Yin, "The electrooptic properties of a vertically aligned fast response liquid crystal display with three-electrode driving," J. Phys. D: Appl. Phys. 37, 994-997 (2004).   DOI   ScienceOn
13 J. L. West, G. Zhang, A. Glushchenko, and Y. Reznikov, "Fast birefringent mode stressed liquid crystal," Appl. Phys. Lett. 86, 031111 (2005).   DOI   ScienceOn
14 J. S. Gwag, J. C. Kim, and T.-H. Yoon, "Electrically tilted liquid crystal display mode for high speed operation," Jpn. J. Appl. Phys. 45, 7047-7049 (2006).   DOI
15 J.-I. Baek, K.-H. Kim, J. C. Kim, T.-H. Yoon, H. S. Woo, S. T. Shin, and J. H. Souk, "Fast in-plane switching of a liquid crystal cell triggered by a vertical electric field," Jpn. J. Appl. Phys. 48, 104505 (2009).   DOI
16 D. H. Song, J.-W. Kim, K.-H. Kim, S. J. Rho, H. Lee, H. Kim, and T.-H. Yoon, "Ultrafast switching of randomlyaligned nematic liquid crystals," Opt. Express 20, 11659- 11664 (2012).   DOI
17 B.-H. Yu, D. H. Song, K. H. Kim, B. W. Park, S.-W. Choi, S. I. Park, S. G. Kang, J. H. Yoon, B. K. Kim, and T.-H. Yoon, "Formation of polymer networks for fast in-plane switching of liquid crystals at low temperatures," Jpn. J. Appl. Phys. 52, 094102 (2013).   DOI
18 H. K. Shin, J. H. Lee, J.-W. Kim, T.-H. Yoon, and J. C. Kim, "Fast polarization switching panel with high brightness and contrast ratio for three-dimensional display," Appl. Phys. Lett. 98, 063505 (2011).   DOI   ScienceOn
19 B. W. Park, J.-W. Kim, S.-W. Oh, J.-W. Huh, and T.-H. Yoon, "Fast switching of a vertically-aligned liquid crystal cell by forming polymer networks at a low temperature," in Proc. SID International Symposium (San Diego Convention Center, USA, June 2014), pp. 1473-1475.
20 C. Z. van Doorn, "Dynamic behavior of twisted nematic liquid crystal layers in switched fields," J. Appl. Phys. 46, 3738-3745 (1975).   DOI   ScienceOn
21 L. Rao, S. Gauza, and S.-T. Wu, "Low temperature effects on the response time of liquid crystal displays," Appl. Phys. Lett. 94, 071112 (2009).   DOI   ScienceOn
22 M. F. Schiekel and K. Fahrenschon, "Deformation of nematic liquid crystals with vertical orientation in electrical fields," Appl. Phys. Lett. 19, 391-393 (1971).   DOI
23 M. Oh-e and K. Kondo, "Electro-optical characteristics and switching behavior of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).   DOI
24 K.-H. Kim, E.-Y. Jeon, B. W. Park, S.-W. Choi, D. H. Song, H. Kim, K.-C. Shin, H. S. Kim, and T.-H. Yoon, "High-transmittance multi-domain vertical alignment liquid crystal device with protrusion structure," J. Opt. Soc. Korea 16, 166-169 (2012).   과학기술학회마을   DOI   ScienceOn
25 J.-W. Kim, T.-H. Choi, and T.-H. Yoon, "Design of an electrode structure for the elimination of the off-axis gamma shift in a multi-domain vertical alignment liquid crystal cell," J. Inf. Disp. 15, 19-23 (2014).   DOI
26 J. I. Baek, K.-H. Kim, J. C. Kim, T.-H. Yoon, H. S. Woo, S. T. Shin, and J. H. Souk, "Fast switching of vertical alignment liquid crystal cells with liquid crystalline polymer networks," Jpn. J. Appl. Phys. 48, 056507 (2009).   DOI