公开(公告)号：US5111320A

公开(公告)日：1992-05-05

申请号：US619411

申请日：1990-11-29

申请人： Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull ,  Joseph F. Stephany ,  Andras I. Lakatos ,  Ram S. Narang

发明人： Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull ,  Joseph F. Stephany ,  Andras I. Lakatos ,  Ram S. Narang

IPC分类号： G02F1/1343 ,  G02F1/141

CPC分类号： G02F1/134309 ,  G02F1/141 ,  G02F2201/122

摘要： A light shutter is provided wherein a first plate which includes a pixel electrode for use in applying a includes a background electrode located adjacent the pixel voltage potential across a ferroelectric material also electrode and substantially surrounding the pixel electrode, whereby an electronic mask can be created adjacent the pixel electrode in the ferroelectric material. A second plate which, along with the first plate sandwiches the ferroelectric material, includes a backplane electrode which is used in conjunction with the pixel and background electrodes on the first plate for applying voltage potentials across the ferroelectric material. By maintaining a minimal amount of spacing between the background electrode and the pixel electrode, a voltage potential can be applied between the background and backplane electrodes so that the ferroelectric material located adjacent the pixel electrode can be maintained in, for example, a non-light transmissive state whereby the contrast between the pixel and inter-pixel regions is greatly improved. Image bars or displays can be formed by arranging a plurality of light shutters (and consequently, pixel electrodes) on the first plate with one or more background electrodes surrounding the plurality of pixel electrodes. Additionally, the background electrode and/or other electrodes can be used for applying electric fields to the ferroelectric material which are non-parallel to the polarization direction of the molecules of the ferroelectic material to reduce the time required to change the ferroelectric material between light transmissive and light blocking states.

摘要翻译： 提供了一种光闸，其中包括用于施加的像素电极的第一板包括邻近铁电材料电极并且基本上围绕像素电极的像素电压电位附近的背景电极，由此可以相邻地形成电子掩模 铁电材料中的像素电极。 与第一板夹着铁电材料一起的第二板包括背板电极，其与第一板上的像素和背景电极结合使用，以跨越铁电体材料施加电压电位。 通过在背景电极和像素电极之间保持最小量的间隔，可以在背景电极和背板电极之间施加电压电位，使得位于像素电极附近的铁电材料可以保持在例如非光 透射状态，从而大大提高像素和像素间区域之间的对比度。 可以通过在多个像素电极周围设置一个或多个背景电极而在第一板上布置多个光快门（以及因此的像素电极）来形成图像条或显示器。 此外，背景电极和/或其他电极可以用于向铁电材料施加电场，铁电材料不与铁电材料的分子的偏振方向平行，以减少在透光性之间改变铁电材料所需的时间 和阻光状态。

公开(公告)号：US5177475A

公开(公告)日：1993-01-05

申请号：US630205

申请日：1990-12-19

申请人： Joseph F. Stephany ,  Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull

发明人： Joseph F. Stephany ,  Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull

IPC分类号： G02F1/1333 ,  G02F1/1337 ,  G06K15/12 ,  G09G3/36

CPC分类号： G06K15/1252 ,  G02F1/133711 ,  G09G3/3629 ,  G09G3/3685 ,  G02F1/133345 ,  G09G2310/06 ,  G09G2310/061

摘要： Liquid crystal devices are provided with a DC current blocking layer which improves the lifetime of the liquid crystal device and also permits the use of two-level drivers, thus reducing the complexity of the driving scheme necessary to address the liquid crystal devices. Preferably, the blocking layer is the alignment layer which is made from poly-para-xylylene having a thickness sufficient to act as a DC blocking layer. Additionally, specific driving schemes for driving liquid crystal devices are provided. When the liquid crystal device includes a material which relaxes when no voltage is applied thereto (e.g., a nematic material), the information signal is entirely removed from alternating time frames during which the liquid crystal device is addressed. When the liquid crystal device includes a ferroelectric material, an arbitrarily large voltage potential is applied to the electrodes located on one side of the ferroelectric material for a first portion of a dwell time so that the pixels of the liquid crystal device are easily cleared of any previous information.

摘要翻译： 液晶装置设置有DC电流阻挡层，其提高了液晶装置的寿命，并且还允许使用两级驱动器，从而降低了解决液晶装置所需的驱动方案的复杂性。 优选地，阻挡层是由具有足以充当DC阻挡层的厚度的聚对二甲苯制成的取向层。 另外，提供了用于驱动液晶装置的具体驱动方案。 当液晶装置包括当没有电压施加到其上时放松的材料（例如向列型材料）时，信息信号完全从液晶装置寻址的交替时间帧中移除。 当液晶装置包括铁电体材料时，对于驻留时间的第一部分，位于铁电材料一侧的电极施加任意大的电压电位，使得液晶装置的像素容易清除任何 以前的信息。