向列液晶界面锚定能被认为是液晶分子与固体界面上分子相互作用势之和,据此导出了锚定能的新公式,它包含两项,因而有两个强度参量,其中第二项是由于界面诱导双轴性而引起的,倾角锚定强度Aθ和方位角锚定强度定Aφ的差别可归因于此.用新的锚定能公式详细研究了弱锚定扭曲(超扭曲)向列液晶盒,假定Aθ/Aφ=k11/k12,计算了阈值场强和饱和场强的大小,与以前我们认为的Aθ/Aφ=1情况做了比较.结果表明,倾角锚定强度Aθ与方位角锚定强度Aφ的关系对扭曲(超扭曲)向列液晶盒的阈值场强和饱和场强都有影响.
参考文献
| [1] | Blinov L M, Chigrinov V G. Electrooptic Effects in Liquid Crystal Materials [M]. Springer Verlag,New York,1994. |
| [2] | 张志东,李志广,孔浩,等.空间各向异性两体势与液晶定向排列[J].液晶与显示,2003,18(4):235-239. |
| [3] | Papini A, Paplular M. Distorsion d＇une lamelle nèmatique sous champmagnètique conditions d＇ancrage auxparois[J]. J. Phys.(Paris) Collq. 1969,30 : C4-54-56. |
| [4] | Jérōme B. Surface efffects and anchoring in liquid crystals[J]. Rep. Prog. Phys. , 1991, 54:391-451. |
| [5] | Sugimura Akihiko, Luckhurst Geffrey R, Ou-yang Zhong-can. Director deformation of a twisted chiral nematic liquid crystal cell with weak anchoring boundaries[J]. Phys. Rev. E. , 1995, 52 :681-689. |
| [6] | Faetti S, Gatti M, Palleschiv, et al. Almost critical behavior of the anchring energy at the interface between a nematic liquid crystal and a SiO substrate[J]. Phys. Rev. Lett., 1985, 55:1681-1684. |
| [7] | 安海龙,杨国琛,安志兰,等.向列相液晶盒挠曲电效应的理论分析[J].液晶与显示,2003,18(4):240-243. |
| [8] | Schadt M, Helfrich W. Voltage-dependent optial activity of twisted nematic liquid crystal[J]. Appl. Phys. Lett., 1971, 18 : 127-128. |
| [9] | Nehring J, Kmetz A R, Scheffer T J. Analysis of weak-boundary-coupling effects in liquid-crystal displays[J]. J. Appl. Phys.,1976, 47:850-857. |
| [10] | Yang K H. Freedericksz transition of twisted nematic cells[J]. Appl. Pyhs. Lett., 1983, 43:171-173. |
| [11] | Becker M E, Nehring J, Scheffer T J. Theory of twisted nematic layers with weak boundary coupling [J]. J. Appl. Phys. , 1985,57 :4539-4542. |
| [12] | Hirning R, Funk W, Trebin H R, et al. Threshold behavior and electro-optical properties of twisted of twisted nematic layers with weak anchoring in the tilt and twist angle[J]. J. Appl. Phys. , 1991,70:4211-4216. |
| [13] | Vilfam M, Copic M. Azimuthal and zenithal anchoring of nematic liquid crystals[J]. Phys Rev. E, 2003, 68:031704(1-4). |
| [14] | 李拍符.液晶物理[J].液晶与显示,2000,15(3);217-241. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%