Effect of chiral dopants on performance of supper twisted nematic liquid crystal

SHI Zi-qian; QIAO Yun-xia; GUI Li-hong; CUI Qing; CHEN Xue-jiao; HUA Rui-mao

doi:10.3788/YJYXS20142902.0178

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Effect of chiral dopants on performance of supper twisted nematic liquid crystal

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- Effect of chiral dopants on performance of supper twisted nematic liquid crystal
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 2, Pages: 178-182(2014)
- 作者机构：
  
  1. 石家庄诚志永华显示材料有限公司,河北石家庄,050091
  2. 河北省平板显示材料工程技术研究中心,河北石家庄,050091
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20142902.0178
  CLC： TB322
- Received：06 January 2013，
  
  Revised：30 January 2013，
  
  Published：05 March 2014
- 稿件说明：
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史子谦, 乔云霞, 贵丽红, 崔青, 陈雪娇, 华瑞茂. 不同手性剂对超扭曲向列相液晶的影响[J]. 液晶与显示, 2014,29(2): 178-182

SHI Zi-qian, QIAO Yun-xia, GUI Li-hong, CUI Qing, CHEN Xue-jiao, HUA Rui-mao. Effect of chiral dopants on performance of supper twisted nematic liquid crystal[J]. , 2014,29(2): 178-182
史子谦, 乔云霞, 贵丽红, 崔青, 陈雪娇, 华瑞茂. 不同手性剂对超扭曲向列相液晶的影响[J]. 液晶与显示, 2014,29(2): 178-182 DOI： 10.3788/YJYXS20142902.0178.

SHI Zi-qian, QIAO Yun-xia, GUI Li-hong, CUI Qing, CHEN Xue-jiao, HUA Rui-mao. Effect of chiral dopants on performance of supper twisted nematic liquid crystal[J]. , 2014,29(2): 178-182 DOI： 10.3788/YJYXS20142902.0178.

摘要

STN-LCD在LCD显示器中占有重要地位，它价格低廉，制造工艺简单，在小型、便携式显示设备中占有重要市场。显示器显示品质与液晶材料的参数有关，研究了对于相同的液晶材料体系，使用不同的手性剂，对液晶的各项显示参数的影响和在一个母体液晶材料中，添加扭曲能力不同的手性掺加剂，对响应速度、温度系数、视角等方面的影响。按照

/360计算手性掺加剂用量，将不同结构手性剂加入到母体体系中，在室温时得到的阈值电压相同，测试不同温度时，DV/DT不同，响应速度变化率不同。总结了在工业生产上应如何评价和选择合适的手性剂。

Abstract

STN-LCD has an important position in portable display market for its low price and simple manufacturing process. The display quality strongly related to LC material components

especially the characteristic of chiral dopants.In this paper

different twist ability chiral dopants were added in the same LC Host

and its influence on response time

temperature coefficient and view angle were stu-died. The quantities of chiral dopants were calculated from

d/p

/360

all the mixtures were the same threshold voltage

then the DV/DT value and the change ratio of response time were measured.We conclude how to choose and evaluate the performance of chiral dopants in massive production.

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references

Terry S, Jurgen N.超扭曲向列相液晶显示[J]. 现代显示, 1995(3):29-52. Terry S, Jurgen N.Super-twisted nematic liquid crystal Display[J].Modern Display, 1995(3):29-52.(in Chinese)[2] Inukai T, Saitoh S, Inoue H, et al. Physical properties of some chiral smectic L1-methyl-alkoxy-phenyl group[J].Mol.Cryst.Liq.Cryst., 1986, 141: 251-266.[3] Shibaev V P, Plate N A, Freidzon Y S. Thermotropic liquid crystalline polymers. I. Cholesteric concopolymers[J].J Polym Sci: Polym Chem Edit, 1979, 17: 1655-1670.[4] 尹玉英, 刘春蕴. 有机化合物分子旋光性螺旋理论[M]. 北京:化学工业出版社, 2000:193. Yin Y Y, Liu C Y.Organic Compound Molecular Optically Active Helical Theory[M]. BeiJing: Chemical Industry Press, 2000:193.[5] Ma J, Shi L, Yang D K, et al.Electro-optical properties of polymer stabilized cholesteric liquid crystal film[J].Chin.Phys., 2011, B20:024212.[6] Ma J, Shi L, Yang D K.Bistable polymer stabilibzed cholesteric texture light shutter[J].Appl.Phys.Express, 2010, (3):021702.[7] 刘永智, 杨开愚.液晶显示技术[M].成都:电子科技大学出版社, 2000:17-33. Liu Y Z, Yang K Y.Liquid Crystal Display Technology[M].Chengdu: UEST Press:2000:17-33.(in Chinese)[8] 李智勇, 单艾娴, 孙玉宝. 自然螺距对扭曲相列相液晶显示器的影响[J]. 液晶与显示, 2010, 25(3):329-332. Li Z Y, Shan A X, Sun Y B. Nature pitch effects on twist nematic liquid crystal display[J].Chinese Journal of Liquid Crystals and Displays, 2010, 28(3):329-332.(in Chinese)[9] 张辉, 郭克定. d/p窗口的研究[J]. 液晶通讯, 1995(1):14-16. Zhang H, Guo K D. Study on the d/p windows in STN-LCD[J].Liquid Crystal Communication, 1995(1):14-16.(in Chinese)

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