公开(公告)号：WO1987001822A1

公开(公告)日：1987-03-26

申请号：PCT/US1986001927

申请日：1986-09-16

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  DOANE, J., William ,  WEST, John, L. ,  CHIDICHIMO, Giuseppe ,  VAZ, Nuno, A., P. ,  WU, Bao-Gang ,  GOLEMME, Attilio ,  ZUMAR, Slobodan

IPC: G02F01/13

CPC classification number: G02F1/1334 ,  C09K19/544

Abstract: The spontaneous formation of liquid crystal microdroplets by regulated phase separation from a solution of their isotropic state in matrix-producing composition, the matrix being solid and light transmissive synthetic resin, during solidification of such matrix yields a light modulating material consisting essentially of microdroplets (11) of liquid crystal dispersed in the matrix (10).

Abstract translation: 在这种基体固化过程中，在基质产生组合物（基体为固体和透光合成树脂）中，通过调节相分离其各向同性态的溶液自发形成液晶微滴，产生基本上由微滴组成的光调制材料 ）分散在基质（10）中的液晶。

公开(公告)号：WO1996036904A1

公开(公告)日：1996-11-21

申请号：PCT/US1996007228

申请日：1996-05-17

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  BOS, Philip, L. ,  VITHANA, Hemasiri, K. ,  JOHNSON, David, L. ,  CHEN, Jianmin

IPC: G02F01/1347

CPC classification number: G02F1/133753 ,  G02F2001/133757 ,  G02F2001/13775

Abstract: A liquid crystalline light modulating pixel (10) includes first and second cell wall structures (14, 16) and nematic liquid crystal (12) disposed therebetween. The first and second wall structures (14, 16) cooperate with the liquid crystal (12) to form four liquid crystal domains (d1, d2, d3, d4) within the pixel (10). The liquid crystal (12) in each of the domains (d1, d2, d3, d4) exhibits a twisted nematic liquid crystal structure and the orientation of the liquid crystal director of the liquid crystal (12) adjacent one of the cell wall structures (14, 16) in at least two domains is different.

Abstract translation: 液晶光调制像素（10）包括设置在其间的第一和第二电池壁结构（14,16）和向列型液晶（12）。 第一和第二壁结构（14,16）与液晶（12）配合，以在像素（10）内形成四个液晶畴（d1，d2，d3，d4）。 各区域（d1，d2，d3，d4）中的液晶（12）呈现扭曲的向列型液晶结构，液晶（12）的液晶指向器的取向相邻于单元壁结构 在至少两个结构域中，14,16）是不同的。

公开(公告)号：WO1994010260A1

公开(公告)日：1994-05-11

申请号：PCT/US1993009999

申请日：1993-10-19

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  WEST, John ,  YANG, Deng-Ke

IPC: C09K19/52

CPC classification number: C09K19/0208 ,  C09K19/542 ,  C09K19/544 ,  C09K19/586 ,  G02F1/13718 ,  G02F2001/13345

Abstract: A light modulating reflective cell comprising a polymer-free chiral nematic liquid crystalline light modulating material is disclosed. The cell includes nematic liquid crystal having positive dielectric anisotropy and chiral material in an amount effective to form focal conic and twisted planar textures. The chiral material has a pitch length effective to reflect light in the visible spectrum, wherein the focal conic and twisted planar textures are stable in the absence of a field and the liquid crystal material is capable of changing textures upon the application of a field.

Abstract translation: 公开了一种包含无聚合物的手性向列液晶光调制材料的光调制反射单元。 该单元包括具有正介电各向异性的向列型液晶和有效形成焦圆锥形和扭曲平面纹理的量的手性材料。 手性材料具有有效地反射可见光谱中的光的节距长度，其中焦点圆锥和扭曲的平面纹理在不存在场的情况下是稳定的，并且液晶材料能够在施加场时改变纹理。

公开(公告)号：WO1992019695A2

公开(公告)日：1992-11-12

申请号：PCT/US1992003504

申请日：1992-04-28

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  DOANE, William, J. ,  YANG, Deng-Ke ,  CHIEN, Liang-Chy

IPC: C09K19/56

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.

Abstract translation: 新的液晶光调节电池和材料的特征在于分散在具有正介电各向异性的手性向列型液晶中的聚合物网络的相分离多畴，该聚合物的存在量小于材料总重量的10重量％ 并且优选地是交联的。 多晶畴附近的液晶比外围区域对液晶的应用场响应较小，由此新材料响应于不同的场条件而表现出不同的光学状态。 在一个实施例中，该材料是在场关断状态下的光散射并且在场接通条件下是光学透明的，而在另一个实施例中，新材料在场关闭状态下是光学透明的，并且在场中的光散射 条件。 在另一个实施方案中，新材料在彩色光反射状态和光散射状态下在零场中表现出稳定性，并且在场的存在下在光学上是透明的。

公开(公告)号：WO1998020391A1

公开(公告)日：1998-05-14

申请号：PCT/US1997020197

申请日：1997-11-04

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  BOS, Philip, L. ,  CHEN, Jianmen ,  JOHNSON, David, L. +di ,  GLENN, William, E. ,  HOLTON, Carvel, E. ,  SMITH, Brett, E.

IPC: G02F01/1337

CPC classification number: G02F1/1396 ,  G02F1/133753 ,  G02F1/292 ,  G02F2201/305 ,  G02F2203/48

Abstract: A reflective liquid crystalline diffractive light valve for use in a diffractive projection system (50). The liquid crystal cell (64) includes a transparent substrate and a reflective substrate treated to provide alternating stripes which cooperate with the liquid crystal to form liquid crystal domains extending across the thickness of the cell that will produce an appropriate phase difference in light reflected by the cell (64), irrespective of the polarization of incident light. The techniques embodied in the present invention are applicable to the creation of electrically controllable diffractive optical elements for ray optic, integrated optic or fiber optic utilization operated in either transmission or reflection. Diffractive patterns may be lithographically or interferometrically generated.

Abstract translation: 一种用于衍射投影系统（50）的反射型液晶衍射光阀。 液晶单元（64）包括透明基板和反射基板，所述反射基板被处理以提供与液晶协作的交替条纹，以形成横跨单元厚度延伸的液晶畴，该晶体畴将产生由 单元（64），与入射光的偏振无关。 本发明中体现的技术可用于创建用于在传输或反射中操作的射线光学，集成光学或光纤利用的电可控衍射光学元件。 衍射图案可以是光刻的或干涉测量的。

公开(公告)号：WO1985004262A1

公开(公告)日：1985-09-26

申请号：PCT/US1985000397

申请日：1985-03-08

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  DOANE, Joseph, W. ,  CHIDICHIMO, Giuseppe ,  VAZ, Nuno, A., P.

IPC: G02F01/13

CPC classification number: C09K19/00 ,  C09K19/544 ,  G02B5/3025 ,  G02F1/1334

Abstract: A material consisting of a dispersion of liquid crystal (11) in a clear resin matrix (10), preferably an epoxy, shows a reversible, high contrast change from an opaque mode (Fig. 2) to a clear light transmission mode (Fig. 1) when either the temperature of the material is changed to transform the dispersed liquid crystal into the isotropic phase (Fig. 1) or an electric field is applied across the material to align the liquid crystal directors (Figs. 1-3). The same material in a stretched condition becomes light transmissive (26) and acts to polarize the transmitted light (26') in a direction perpendicular to the direction of stretch (25) (Fig. 4).

Abstract translation: 由透明树脂基体（10）中的液晶（11）的分散体（优选环氧树脂）组成的材料显示出从不透明模式（图2）到透光模式（图2）的可逆的高对比度变化。 1）当材料的温度改变以将分散的液晶转变成各向同性相（图1）时，或者在整个材料上施加电场以对准液晶指向器（图1-3）。 在拉伸条件下的相同材料变成透光的（26）并且用于使垂直于拉伸方向（25）的方向（图4）偏振透射光（26'）。

公开(公告)号：WO1993023496A1

公开(公告)日：1993-11-25

申请号：PCT/US1992009367

申请日：1992-10-30

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  DOANE, William, J. ,  YANG, Deng-ke ,  CHIEN, Liang-Chy

IPC: C09K19/52

CPC classification number: C09K19/02 ,  C09K19/542 ,  C09K19/544 ,  C09K19/586 ,  G02F1/0131 ,  G02F1/1334 ,  G02F1/13718 ,  G02F2001/13345 ,  G02F2001/13347 ,  G02F2001/13775

Abstract: A new liquid crystalline light modulating cell and material are characterized by liquid crystalline light modulating material of liquid crystal and polymer, the liquid crystal being a chiral nematic liquid crystal (16) having positive dielectric anisotropy and including chiral material in an amount effective to form focal conic and twisted planar textures, the polymer being distributed in phase separated domains (15) in the liquid crystal cell in an amount that stabilizes the focal conic and twisted planar textures in the absence of a field and permits the liquid crystal to change textures upon the application of a field. 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 material is optically clear in a field-OFF condition and light scattering in a field-ON condition. In still another embodiment, the material exhibits stability at zero field in a colored, light reflecting state, a light scattering state and multiple stable reflecting state therebetween, as well as being optically clear in the presence of a field.

Abstract translation: 新的液晶光调制元件和材料的特征在于液晶和聚合物的液晶光调制材料，液晶是具有正介电各向异性的手性向列液晶（16），并且包括有效形成焦点的量的手性材料 锥形和扭曲的平面纹理，聚合物在液晶单元中以相分离的畴（15）分布，其量在不存在场的情况下稳定焦锥和扭曲的平面纹理，并允许液晶改变纹理 应用领域。 在一个实施例中，该材料在场OFF状态下是光散射并且在场导通条件下是光学透明的，而在另一实施例中，该材料在场关闭状态下是光学透明的并且在场导通条件下的光散射 。 在另一个实施方案中，该材料在彩色光反射状态下的零场稳定性，在其间具有光散射状态和多个稳定的反射状态，以及在场的存在下光学清晰。

公开(公告)号：WO1989009807A1

公开(公告)日：1989-10-19

申请号：PCT/US1989001446

申请日：1989-04-07

Applicant: KENT STATE UNIVERSITY

Inventor： KENT STATE UNIVERSITY ,  DOANE, Joseph, W. ,  WEST, John, L.

IPC: C09K19/52

CPC classification number: G02F1/1334 ,  C09K19/38 ,  C09K19/544 ,  G02F2001/13347

Abstract: A haze-free light modulating polymer dispersed liquid crystal (PDLC) material is disclosed which comprises a polymer matrix which is birefringent and possesses anisotropic optical properties similar to those of the dispersed liquid crystal microdroplets such that the PDLC material in its transparent state exhibits a refractive index that is matched for all directions of incident light providing for an optically clear, scatter-free film for all angles of view. Electrooptic light shutters are possible from this material which are transparent in the field OFF-state and opaque in the field ON-state or vice versa, depending upon the microdroplet structure and configuration of the light shutter device.

Abstract translation: 公开了一种无雾光调制聚合物分散液晶（PDLC）材料，其包含双折射聚合物基质，并且具有与分散的液晶微滴相似的各向异性光学特性，使得其透明状态下的PDLC材料呈现折射率 入射光的所有方向匹配的索引，为所有视角提供光学透明，无散射的膜。 根据光阀组件的微滴结构和配置，电光闸可以在场外OFF状态下透明并且在场中不透明的材料，或反之亦然。

公开(公告)号：WO1989005470A1

公开(公告)日：1989-06-15

申请号：PCT/US1988004154

申请日：1988-11-18

Applicant: KENT STATE UNIVERSITY ,  INSTITUT JOZEF STEFAN

Inventor： KENT STATE UNIVERSITY ,  INSTITUT JOZEF STEFAN ,  BLINC, Robert ,  DOANE, J., William ,  MARIN, Bojan ,  MUSEVIC, Igor ,  PIRS, Janez ,  PIRS, Silva ,  ZUMER, Slobodan ,  KOPAC, Samo

IPC: G02F01/13

CPC classification number: H04N9/3105

Abstract: The invention provides a low loss liquid crystal modulator for coloring and shaping a light beam (IB) wherein liquid crystal light modulators (2B, 2G, 2R) provide continuous variation in color and intensity output by controlled scattering; the liquid crystal light modulators (2B, 2G, 2R) comprise addressable sheets of light-wave-length size liquid crystal occlusions in a transparent matrix (21); the modulators (2B, 2G, 2R) employ nematic liquid crystal exhibiting positive dielectric anisotropy; the modulator is employed in varying and coloring output beams (OB) to allow for colored data or video transmission; images produced may vary in time as is required for, e.g., color television; the modulator is employed in color projectors for both data and video projection, for color printing, and for colored stage illumination. Low loss transmission of the modulators (2B, 2G, 2R) provides for bright images which can be viewed under high ambient illumination.