公开(公告)号：WO2009151716A2

公开(公告)日：2009-12-17

申请号：PCT/US2009038086

申请日：2009-03-24

Applicant: UNIV KENT STATE OHIO ,  YANG DENG-KE ,  SHI LEI ,  BAO RUI

Inventor： YANG DENG-KE ,  SHI LEI ,  BAO RUI

CPC classification number: G02F1/13718 ,  G02F2001/13775

Abstract: A bistable switchable liquid crystal device is provided in which the device can be switched between a transparent and an opaque state by a predetermined voltage pulse. The device is based on polymer stabilized cholesteric materials. No additional amount of voltage has to be applied to the device in order to sustain the optical states. Therefore, the device is energy-saving.

Abstract translation: 提供双稳态可切换液晶装置，其中该装置可以通过预定的电压脉冲在透明和不透明状态之间切换。 该设备基于聚合物稳定的胆固醇材料。 为了维持光学状态，不需要对器件施加额外的电压量。 因此，该设备节能。

公开(公告)号：WO9850804A3

公开(公告)日：1999-04-08

申请号：PCT/US9809259

申请日：1998-05-06

Applicant: UNIV KENT STATE OHIO

Inventor： YANG DENG-KE ,  ZHU YANG-MING ,  HUANG XIAO-YANG

IPC: G02F1/133 ,  G02F1/137 ,  G09G3/20 ,  G09G3/36

CPC classification number: G09G3/3629 ,  G02F1/13718 ,  G09G3/2011 ,  G09G3/2014 ,  G09G3/3681 ,  G09G2300/0486 ,  G09G2310/0205 ,  G09G2310/06 ,  G09G2320/0209

Abstract: A flat-panel liquid crystal display (10). The display includes a flat sheet of bistable chiral nematic liquid crystal material activated by a drive circuit that individually controls the display state of multiple picture elements. The driver circuitry activates the liquid crystal domains with various drive schemes which have any number of different phases (300, 312, 318, and 320) to attain various addressing sequence times. At the end of each drive scheme, the texture of the liquid crystal material is allowed to provide either focal conic or twisted planar end states (320) across the two-dimensional array of picture elements. Each drive scheme employs at least a preparation phase (300) and a selection phase (318) to predispose the liquid crystal material to one of the end states.

Abstract translation: 一种平板液晶显示器（10）。 显示器包括由驱动电路激活的双稳态手性向列型液晶材料的平板，其单独控制多个图像元素的显示状态。 驱动器电路利用具有任意数量的不同相位（300,312,318和320）的各种驱动方案激活液晶畴，以获得各种寻址序列时间。 在每个驱动方案的最后，液晶材料的纹理被允许跨越图像元素的二维阵列提供焦点圆锥或扭曲的平面端状态（320）。 每个驱动方案至少使用准备阶段（300）和选择阶段（318）来将液晶材料倾向于结束状态之一。

公开(公告)号：WO9219695A3

公开(公告)日：1992-12-10

申请号：PCT/US9203504

申请日：1992-04-28

Applicant: UNIV KENT STATE OHIO

Inventor： DOANE WILLIAM J ,  YANG DENG-KE ,  CHIEN LIANG-CHY

IPC: C09K19/02 ,  C09K19/38 ,  C09K19/54 ,  C09K19/56 ,  C09K19/58 ,  G02F1/01 ,  G02F1/1333 ,  G02F1/1334 ,  G02F1/137 ,  G02F1/13

CPC classification number: G02F1/13718 ,  C09K19/02 ,  C09K19/542 ,  C09K19/544 ,  C09K19/586 ,  G02F1/0131 ,  G02F2001/13345 ,  G02F2001/13347 ,  G02F2001/13775

Abstract: A new liquid crystalline light modulating cell and material are characterized by phase-separated polydomains of polymer networks dispersed in chiral nematic liquid crystal having positive dielectric anisotropy, the polymer being present in an amount less than 10 % by weight of the total weight of the material and, preferably, being cross-linked. The liquid crystal in the vicinity of the polydomains is less responsive to an applied field than surrounding regions of liquid crystal, whereby the new material exhibits different optical states in response to different field conditions. In one embodiment, the material is light scattering in a field-OFF condition and optically clear in a field-ON condition, while in another embodiment, the new material is optically clear in a field-OFF condition and light scattering in a filed-ON condition. In still another embodiment, the new material exhibits stability at zero field in both a colored, light reflecting state and a light scattering state, as well as being optically clear in the presence of a field.