Electro-optical properties of polymer stabilized cholesteric liquid crystal film

Liquid crystals (LCs) and polymers are extensively used in various electro-optical applications. In this paper, normal mode polymer stabilized cholesteric LC film is prepared and studied. The effects of chiral dopant and monomer concentrations on the electro-optical properties, such as contrast ratio, driving voltage, hysteresis width and response time, are investigated. The reasons of electro-optical properties influenced by the concentrations of the materials are discussed. Through the proper material recipe, the electro-optical properties of polymer stabilized cholesteric LC film can be optimized.

[1]  R. Twieg,et al.  Dichroic dye‐doped bistable polymer‐stabilized cholesteric‐texture light valve , 2000 .

[2]  Huang Ziqiang,et al.  Reflective spectrum broadened by nano-particle-network in chiral liquid crystals , 2008 .

[3]  Shin-Tson Wu,et al.  Fundamentals of Liquid Crystal Devices , 2006 .

[4]  Deng-Ke Yang,et al.  Cholesteric reflective display: Drive scheme and contrast , 1994 .

[5]  J. W. Doane,et al.  Polymer networks formed in liquid crystals , 1995 .

[6]  Chi-Yen Huang,et al.  Effect of chiral dopant and monomer concentrations on the electro-optical response of a polymer stabilized cholesteric texture cell , 2006 .

[7]  Zi Qiang Huang.  Bistable Technology in Flat Panel Display: Principle and Progress , 2010 .

[8]  L. Xuan,et al.  Kinetics investigations for holographic Bragg grating based on polymer dispersed liquid crystal , 2008 .

[9]  Hui Cao,et al.  Broadband reflection in polymer stabilized cholesteric liquid crystal cells with chiral monomers derived from cholesterol , 2008 .

[10]  Masayuki Yokota,et al.  Polymer-stabilized liquid crystal blue phases , 2002, Nature materials.

[11]  Yang-Ming Zhu,et al.  BISTABLE CHOLESTERIC REFLECTIVE DISPLAYS:Materials and Drive Schemes , 1997 .

[12]  L. Xuan,et al.  Improvements in morphological and electro‐optical properties of polymer‐dispersed liquid crystal grating using a highly fluorine‐substituted acrylate monomer , 2008 .

[13]  H. Cao,et al.  Studies on the electro‐optical properties of polymer stabilised cholesteric liquid crystal/aerosil particles composites , 2009 .

[14]  Liang-Chy Chien,et al.  Cholesteric liquid crystal/polymer dispersion for haze‐free light shutters , 1992 .

[15]  Yang,et al.  Freedericksz transition in polymer-stabilized nematic liquid crystals , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[16]  Yinghan Wang,et al.  Effect of polymer structures on electro-optical properties of polymer stabilized liquid crystal films , 2008 .

[17]  FAST TRACK COMMUNICATION: Optically isotropic liquid crystal composite incorporating in-plane electric field geometry , 2009 .

[18]  Yinghan Wang,et al.  Fine adjustment of network in polymer network liquid crystal film employing RAFT polymerization , 2008 .

[19]  Lei Shi,et al.  Bistable Polymer Stabilized Cholesteric Texture Light Shutter , 2009 .