As substrate materials rigid glass is commonly replaced by PET plastic films for preparing flexible LC cells
the traditional process may cause nonuniform thickness and trap air bubbles in LC cells which deteriorate property of flexible LC device. These problems can be effectively solved by a rolling technique. The detail process has been described in this paper. It was found that the viscosity of solution was reduced by heating the two substrates which avoids the interfusion of air bubbles in the solution and results in LC cells with uniform thickness. 7 cm
2
-sized flexible reflective bistable LC cells are prepared successfully by polymer dispersed cholesteric liquid crystal method. Polymer dispersed cholesteric liquid crystal texture is studied by polarizing microscope. Electro-optical of flexible liquid crystal cell is measured by ultraviolet. The film provided with max reflectivity 22.8%
contrast 2.259
threshold voltage 78 V and saturation voltage 99 V.
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references
Jang S J, Jung J W, Kim J H, et al. Pixel-isolated liquid-crystal mode by using a patterned anisotropic phase separation for flexible LCDs[J]. Journal of the SID, 2007,15(2):119-125.[2] Wang Q B, Guo R, Kumar S. Method for fabrication of liquid-crystal cells with narrow gap, fast switching, and flexible plastic substrates[J]. J. Soc. Inf. Display, 2006, 14(6):545-550.[3] Vorflusev V, Kumar S. Phase-separated composite films for liquid crystal displays[J].Science, 1999, 283(19): 1903-1905.[4] Sato H, Fujikake H, Sato F, et al. A4-sized flexible ferroelectric liquid-crystal displays with micro color filters[J]. Journal of SID, 2005, 13(6):461-468.[5] Carter S A, LeGrange J D, Wiltzius P, et al. Dependence of the morphology of polymer dispersed liquid crystals on the UV polymerization process[J]. J. Appl. Phys., 1997, 81(9): 5992-5999.[6] Kato K, Tanaka K, Tsuru S, Sakai S. Color image formation using polymer-dispersed cholesteric liquid crystal [J]. Jpn. J.Appl. Phys., 1993(32):4600-4604.[7] Huang Y P, Zhu X Y, Ren H W, et al. Full-color transflective cholesteric LCD with image-enhanced reflector[J]. J. Soc. Inf. Display, 2004, 12(4):417-422.[8] 刘国柱,黄子强,杨文君,等.低阈值电压聚合物分散性液晶膜的电光特性[J]. 液晶与显示, 2009, 24(3):383-388.[9] 王丽萍,许锐,黄顺刚,等.添加液晶对PDLC膜电-光性能参数的影响[J]. 液晶与显示, 2010,25(4):554-557.