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公开(公告)号：US5917570A
公开(公告)日：1999-06-29
申请号：US875940
申请日：1997-08-08
IPC分类号： G02F1/1337
CPC分类号： G02F1/13378 , G02F2001/133765
摘要： A liquid crystal display cell comprises two cell walls spaced apart to enclose a layer of liquid crystal material. The cell walls carry electrode structures, e.g. arranged in rows and columns to give an x, y matrix of addressable elements or pixels. The liquid crystal material is aligned by a grating (grooved) structure on one or both cell walls. This grating structure is a bigrating with one symmetrical grating and an asymmetric grating which may be orthogonal to the symmetric grating. The grooves of the asymmetric grating varying their depth or asymmetry along the lengths to give a locally varying pretilt whose longer range average provides a pretilt in a preferred range, e.g. about 2-24 degrees.
摘要翻译： PCT No.PCT / GB96 / 00107 Sec。 371日期：1997年8月8日 102（e）日期1997年8月8日PCT 1996年1月22日PCT公布。 公开号WO96 / 24880 日期1996年8月15日液晶显示单元包括间隔开以包围液晶材料层的两个单元壁。 细胞壁携带电极结构，例如 排列成行和列以给出可寻址元素或像素的x，y矩阵。 液晶材料通过在一个或两个单元壁上的光栅（带槽）结构对准。 该光栅结构是与一个对称光栅和可以与对称光栅正交的非对称光栅的大小。 不对称光栅的凹槽沿着长度改变它们的深度或不对称性，以产生局部变化的预浸料，其较长范围的平均值提供优选范围内的预浸料，例如。 约2-24度。
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公开(公告)号：US06714273B2
公开(公告)日：2004-03-30
申请号：US10212141
申请日：2002-08-06
IPC分类号： G02F11337
CPC分类号： G02F1/13378 , G02F1/139 , G02F1/1391 , G02F1/1392 , G02F1/1396 , G02F2001/133765
摘要： A bistable nematic liquid crystal device cell is provided with a surface alignment grating on at least one cell wall and a surface treatment on the other wall. Such treatment may be a homeotropic alignment or a planar alignment with or without an alignment direction, and zero or a non zero pretilt. The surface profile on the monograting is asymmetric with its groove height to width selected to give approximately equal energy within the nematic material in its two allowed alignment arrangements. The monograting may be formed by a photolithographic process or by embossing of a plastics material. The cell is switched by dc pulses coupling to a flexoelectric coefficient in the material, or by use of a two frequency addressing scheme and a suitable two frequency material. Polarisers either side of the cell distinguish between the two switched states. The cell walls may be rigid or flexible, and are coated with electrode structures, e.g. in row and column format giving an x,y matrix of addressable pixels on the cell.
摘要翻译： 双稳向列型液晶器件单元在至少一个单元壁上设置有表面对准光栅并在另一个壁上具有表面处理。 这种处理可以是垂直排列或具有或不具有取向方向的平面对准，以及零或非零预倾斜。 在单一研磨中的表面轮廓是不对称的，其槽高度被选择为在其两个允许的对准装置中在向列型材料内产生大致相等的能量。 单晶化可以通过光刻工艺或通过塑料材料的压花形成。 电池通过耦合到材料中的柔性电系数的直流脉冲或通过使用双频寻址方案和合适的两频率材料来切换。 电极的两侧的极化器区分两个切换状态。 细胞壁可以是刚性的或柔性的，并且涂覆有电极结构，例如， 以行和列格式给出单元格上的可寻址像素的x，y矩阵。
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3.发明授权Liquid crystal device exhibiting zernithal bistability and a cell wall for such a device 失效显示氮化硼双稳态的液晶装置和用于这种装置的电池壁公开(公告)号：US07280175B2
公开(公告)日：2007-10-09
申请号：US10775342
申请日：2004-02-11
IPC分类号： G02F1/1337
CPC分类号： G02F1/13378 , G02F1/139 , G02F1/1391 , G02F1/1392 , G02F1/1396 , G02F2001/133765
摘要： A bistable nematic liquid crystal device cell is provided with a surface alignment grating on at least one cell wall and a surface treatment on the other wall. Such treatment may be a homeotropic alignment or a planar alignment with or without an alignment direction, and zero or a non zero pretilt. The surface profile on the monograting is asymmetric with its groove height to width selected to give approximately equal energy within the nematic material in its two allowed alignment arrangements. The monograting may be formed by a photolithographic process or by embossing of a plastics material. The cell is switched by dc pulses coupling to a flexoelectric coefficient in the material, or by use of a two frequency addressing scheme and a suitable two frequency material. Polarisers either side of the cell distinguish between the two switched states. The cell walls may be rigid or flexible, and are coated with electrode structures, e.g. in row and column format giving an x,y matrix of addressable pixels on the cell.
摘要翻译： 双稳向列型液晶器件单元在至少一个单元壁上设置有表面对准光栅并在另一个壁上具有表面处理。 这种处理可以是垂直排列或具有或不具有取向方向的平面对准，以及零或非零预倾斜。 在单一研磨中的表面轮廓是不对称的，其槽高度被选择为在其两个允许的对准装置中在向列型材料内产生大致相等的能量。 单晶化可以通过光刻工艺或通过塑料材料的压花形成。 电池通过耦合到材料中的柔性电系数的直流脉冲或通过使用双频寻址方案和合适的两频率材料来切换。 电极的两侧的极化器区分两个切换状态。 细胞壁可以是刚性的或柔性的，并且涂覆有电极结构，例如， 以行和列格式给出单元格上的可寻址像素的x，y矩阵。
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公开(公告)号：US06456348B2
公开(公告)日：2002-09-24
申请号：US09740260
申请日：2000-12-20
IPC分类号： G02F11337
CPC分类号： G02F1/13378 , G02F1/139 , G02F1/1391 , G02F1/1392 , G02F1/1396 , G02F2001/133765
摘要： A bistable nematic liquid crystal device cell is provided with a surface alignment grating on at least one cell wall and a surface treatment on the other wall. Such treatment may be a homeotropic alignment or a planar alignment with or without an alignment direction, and zero or a non zero pretilt. The surface profile on the monograting is asymmetric with its groove height to width selected to give approximately equal energy within the nematic material in its two allowed alignment arrangements. The monograting may be formed by a photolithographic process or by embossing of a plastics material. The cell is switched by dc pulses coupling to a flexoelectric coefficient in the material, or by use of a two frequency addressing scheme and a suitable two frequency material. Polarisers either side of the cell distinguish between the two switched states. The cell walls may be rigid or flexible, and are coated with electrode structures, e.g. in row and column format giving an x,y matrix of addressable pixels on the cell.
摘要翻译： 双稳向列型液晶器件单元在至少一个单元壁上设置有表面对准光栅并在另一个壁上具有表面处理。 这种处理可以是垂直排列或具有或不具有取向方向的平面对准，以及零或非零预倾斜。 在单一研磨中的表面轮廓是不对称的，其槽高度被选择为在其两个允许的对准装置中在向列型材料内产生大致相等的能量。 单晶化可以通过光刻工艺或通过塑料材料的压花形成。 电池通过耦合到材料中的柔性电系数的直流脉冲或通过使用双频寻址方案和合适的两频率材料来切换。 电极的两侧的极化器区分两个切换状态。 细胞壁可以是刚性的或柔性的，并且涂覆有电极结构，例如， 以行和列格式给出单元格上的可寻址像素的x，y矩阵。
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公开(公告)号：US06249332B1
公开(公告)日：2001-06-19
申请号：US09043788
申请日：1998-03-30
IPC分类号： G02F11337
CPC分类号： G02F1/13378 , G02F1/139 , G02F1/1391 , G02F1/1392 , G02F1/1396 , G02F2001/133765
摘要： A bistable nematic liquid crystal device cell (1) is provided with a surface alignment grating on at least one cell wall (3) and a surface treatment on the other wall (4). Such treatment may be a homeotropic alignment or a planar alignment with or without an alignment direction, and zero or a non zero pretilt. The surface profile on the monograting is asymmetric with its grove height to width selected to give approximately equal energy within nematic material (2) in its two allowed alignment arrangements. The monograting may be formed by a photolithographic process or by embossing of a plastics material. The cell (1) is switched by dc pulses coupling to a flexoelectric coefficient in the material (2), or by use of a two frequency addressing scheme and a suitable two frequency material. Polarizers (13,13′) either side of the cell (1) distinguish between the two switched states. The cell walls (3,4) may be rigid or flexible, and are coated with electrode structures (6,7), e.g. in row and column format giving an x,y matrix of addressable pixels on the cell (1).
摘要翻译： 双稳向列型液晶器件单元（1）在至少一个单元壁（3）上设置有表面对准光栅，并在另一壁（4）上设置表面处理。 这种处理可以是垂直排列或具有或不具有取向方向的平面对准，以及零或非零预倾斜。 在单一研磨中的表面轮廓是不对称的，其格栅高度与宽度被选择以在其两个允许的对准布置中在向列相材料（2）内产生大致相等的能量。 单晶化可以通过光刻工艺或通过塑料材料的压花形成。 电池（1）通过耦合到材料（2）中的柔性电系数的直流脉冲或通过使用双频寻址方案和合适的两种频率材料来切换。 单元（1）的任一侧的偏振器（13,13'）区分两种切换状态。 细胞壁（3,4）可以是刚性的或柔性的，并且被电极结构（6,7）涂覆，例如， 以行和列格式给出单元（1）上的可寻址像素的x，y矩阵。
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公开(公告)号：US07265893B2
公开(公告)日：2007-09-04
申请号：US10531080
申请日：2003-10-06
IPC分类号： G02B26/00
摘要： A method of controlling the switching of an optically addressable spatial light modulator (OASLM), to a first surface of which a write light signal is applied and to a second surface of which a read light signal is applied. The method comprises applying a bipolar switching waveform to control electrodes of the (OASLM) during each write cycle such that the leading pulse of the waveform applies a voltage across the (OASLM) which is in the photosensitive direction and the trailing pulse applies a voltage which is not in the photosensitive direction.
摘要翻译： 一种控制光可寻址空间光调制器（OASLM）切换到施加写入光信号的第一表面和施加读取光信号的第二表面的方法。 该方法包括在每个写入周期期间将双极性切换波形施加到（OASLM）的控制电极，使得波形的引导脉冲施加在感光方向上的（OASLM）两端的电压，并且拖尾脉冲施加电压， 不在感光方向。
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