傳統的光學補償模式(Optically Compensated Bend Mode,OCB) 在Twist State下無法停留很久,大約2 minutes就會回到初始的Splay State。本研究是以微量的光可聚合高分子(Polymer A、Polymer C)混合雙頻液晶,注入π-cell液晶盒,照射UV光下,同時外加一個交流電壓,希望能在表面做出高分子網,並降低樣品的表面錨定能,讓液晶初始為Splay State,但在Twist States能停留住一段時間,達到雙穩態的目的。 本研究主要可分為兩個部份,第一部分為高分子混入雙頻液晶內,製作出一種雙穩態在Splay State和Twist State,並討論此種雙穩態在不同電壓下驅動的特性;第二部份為左旋旋光性物質(Chiral)混入雙頻液晶,調整適當的d/p值,同樣做出雙穩態在Splay State和Twist State,並與第一部份的實驗做比較。
The conventional Optically Compensated Bend Mode stays in a Twist State about two minutes,then returns to an initial Splay State. In this study, we mixed dual-frequency nematic MLC-2048 and monomer A and monomer C, injecting the mixture into an empty cell. The cell was exposed to UV light with a curing voltage. We make a bistable liquid crystal cell by forming polymer network in the surface . First, we discussed the electro-optical characteristics of the polymer stabilized dual-frequency liquid crystal cell ,which has two stable states of Splay and Twist States. Next, we make a chiral doped injected the dual-frequency liquid crystal cell. We adjust the d/p ratio and succeed in obtaining the bistable Splay and Twist States.