公开(公告)号：US09261745B2

公开(公告)日：2016-02-16

申请号：US13892895

申请日：2013-05-13

申请人： Hsienhui Cheng ,  Achintya Bhowmik ,  Philip J. Bos

发明人： Hsienhui Cheng ,  Achintya Bhowmik ,  Philip J. Bos

IPC分类号： G02F1/1335 ,  G02F1/1347 ,  G02F1/13363

CPC分类号： G02F1/13471

摘要： A phase retarder comprises first and second π-cells or other tunable birefringent devices arranged optically in series. The phase retardation value of the phase retarder is a difference between the phase retardation values of the first and second π-cells. Driving circuitry drives the phase retarder to generate a target phase retardation value by: (1) prior to a relaxation period, biasing the π-cells to produce the target phase retardation value; (2) during the relaxation period, biasing the first π-cell at a constant bias value; and (3) during the relaxation period, lowering the bias value of the second π-cell continuously or stepwise to maintain the target phase retardation value for the phase retarder throughout the relaxation period. In some embodiments the operation (2) comprises applying zero bias to the first π-cell throughout the relaxation period. In some embodiments the operation (1) comprises applying a maximum operational bias to the second π-cell.

摘要翻译： 相位延迟器包括串联布置的第一和第二单元或其他可调谐双折射器件。 相位延迟器的相位延迟值是第一和第二单元的相位延迟值之间的差。 驱动电路通过以下方式驱动相位延迟器以产生目标相位延迟值：（1）在松弛周期之前，偏置电平以产生目标相位延迟值; （2）在弛豫期间，将第一个＆pgr-cell偏置在一个恒定的偏置值; 和（3）在弛豫期间，连续地或逐步地降低第二个电极的偏置值，以便在整个弛豫期间保持相位延迟器的目标相位延迟值。 在一些实施例中，操作（2）包括在整个弛豫期间对第一＆lt;细胞 - 施加零偏置。 在一些实施例中，操作（1）包括将最大操作偏置应用于第二＆lt;细胞。

公开(公告)号：US20140333875A1

公开(公告)日：2014-11-13

申请号：US13892895

申请日：2013-05-13

申请人： Hsienhui CHENG ,  Achintya Bhowmik ,  Philip J. Bos

发明人： Hsienhui CHENG ,  Achintya Bhowmik ,  Philip J. Bos

IPC分类号： G02F1/01 ,  G02F1/13363

CPC分类号： G02F1/13471

摘要： A phase retarder comprises first and second π-cells or other tunable birefringent devices arranged optically in series. The phase retardation value of the phase retarder is a difference between the phase retardation values of the first and second π-cells. Driving circuitry drives the phase retarder to generate a target phase retardation value by: (1) prior to a relaxation period, biasing the π-cells to produce the target phase retardation value; (2) during the relaxation period, biasing the first π-cell at a constant bias value; and (3) during the relaxation period, lowering the bias value of the second π-cell continuously or stepwise to maintain the target phase retardation value for the phase retarder throughout the relaxation period. In some embodiments the operation (2) comprises applying zero bias to the first π-cell throughout the relaxation period. In some embodiments the operation (1) comprises applying a maximum operational bias to the second π-cell.

摘要翻译： 相位延迟器包括串联布置的第一和第二单元或其他可调谐双折射器件。 相位延迟器的相位延迟值是第一和第二单元的相位延迟值之间的差。 驱动电路通过以下方式驱动相位延迟器以产生目标相位延迟值：（1）在松弛周期之前，偏置电平以产生目标相位延迟值; （2）在弛豫期间，将第一个＆pgr-cell偏置在一个恒定的偏置值; 和（3）在弛豫期间，连续地或逐步地降低第二个电极的偏置值，以便在整个弛豫期间保持相位延迟器的目标相位延迟值。 在一些实施例中，操作（2）包括在整个弛豫期间对第一＆lt;细胞 - 施加零偏置。 在一些实施例中，操作（1）包括将最大操作偏置应用于第二＆lt;细胞。

公开(公告)号：US20160109760A1

公开(公告)日：2016-04-21

申请号：US14845924

申请日：2015-09-04

申请人： Valerie A. Finnemeyer ,  Robert K. Reich ,  Harry R. Clark ,  Carl O. Bozler ,  Shaun R. Berry ,  Philip J. Bos ,  Douglas R. Bryant

发明人： Valerie A. Finnemeyer ,  Robert K. Reich ,  Harry R. Clark ,  Carl O. Bozler ,  Shaun R. Berry ,  Philip J. Bos ,  Douglas R. Bryant

IPC分类号： G02F1/1337 ,  G02F1/1333

CPC分类号： G02F1/133711 ,  C09K19/56 ,  G02F1/133377 ,  G02F1/133788 ,  G02F2001/133726 ,  G02F2202/043

摘要： Liquid crystal photonic devices and microcavities filled with liquid crystal materials are becoming increasingly popular. These devices often present a challenge when it comes to creating a robust alignment layer in pre-assembled cells. Previous research on photo-definable alignment layers has shown that they have limited stability, particularly against subsequent light exposure. A method of infusing a dye into a microcavity to produce an effective photo-definable alignment layer is described, along with a method of utilizing a pre-polymer infused into the microcavity mixed with the liquid crystal to provide photostability. In this method, the polymer layer, formed under optical irradiation of liquid crystal cells, is effectively localized to a thin region near the substrate surface and thus provides a significant improvement in the photostability of the liquid crystal alignment. This versatile alignment layer method, which can be used in microcavities to displays, offers significant promise for new photonics applications.

摘要翻译： 充满液晶材料的液晶光子器件和微腔变得越来越受欢迎。 当在预组装电池中创建稳健的配向层时，这些器件通常会面临挑战。 以前对光可定义对准层的研究表明，它们具有有限的稳定性，特别是对后续的曝光。 描述了将染料注入微腔以产生有效的光可定义取向层的方法，以及利用注入到与液晶混合的微腔中的预聚物以提供光稳定性的方法。 在该方法中，在液晶单元的光照射下形成的聚合物层有效地定位于基板表面附近的薄区域，从而显着地提高了液晶取向的光稳定性。 这种可用于显微镜的多功能对准层方法为新光子学应用提供了重要的前景。

公开(公告)号：US5748277A

公开(公告)日：1998-05-05

申请号：US390068

申请日：1995-02-17

申请人： Xiao-Yang Huang ,  Philip J. Bos ,  Deng-Ke Yang

发明人： Xiao-Yang Huang ,  Philip J. Bos ,  Deng-Ke Yang

IPC分类号： G02F1/137 ,  G09G3/20 ,  G09G3/36 ,  C09K19/02 ,  G09G5/00

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

摘要： A flat-panel liquid crystal display. 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 at a refresh rate 1000 scan lines per second. The driver circuitry activates the liquid crystal domains into homeotropic states over a relatively long activation period and then, during a short (.about.1 msec.) selection period, either keeps the domains in a homeotropic state or initiate a transition to the transient twisted planar state. The drivers then activate the domains in an evolution phase to provide either focal conic or twisted planar end states across the two-dimensional array of picture elements.

摘要翻译： 平板液晶显示屏。 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，其以刷新率以每秒1000扫描线单独地控制多个图像元素的显示状态。 驱动器电路在相对较长的激活时间段内将液晶畴激活成垂直状态，然后在短（差分1毫秒）选择周期期间，将域保持在垂直状态或启动到瞬态扭曲平面状态的转变 。 然后，驱动程序在进化阶段激活域，以提供横跨二维图像元素阵列的焦点圆锥或扭曲的平面端状态。

公开(公告)号：US4979235A

公开(公告)日：1990-12-18

申请号：US339281

申请日：1989-04-17

申请人： Scott H. Rumbaugh ,  Michael D. Jones ,  Philip J. Bos

发明人： Scott H. Rumbaugh ,  Michael D. Jones ,  Philip J. Bos

IPC分类号： G02F1/13 ,  G02F1/01 ,  G02F1/1347 ,  G02F2/00 ,  H04B10/148

CPC分类号： H04B10/61 ,  G02F1/0136 ,  H04B10/611 ,  H04B10/6151

摘要： A state-of-polarization (SOP) control system (10) uses a SOP controller (28) that is responsive to a CPU (24) to perform endless and complete polarization signal detection for a fiber optic communication system. The SOP controller (28) comprises liquid crystal variable optical retarders (40, 42 and 44) that adjust the polarization state of local optical signal (36) in response to voltages provided by the CPU (24). The CPU (24) adjusts the voltage applied to the retarders (40, 42, and 44) separately in response to the magnitude of an interference signal (70), which corresponds to the degree to which the polarization of the local optical signal (36) and an input optical signal (12) are different.

公开(公告)号：US4582396A

公开(公告)日：1986-04-15

申请号：US493106

申请日：1983-05-09

申请人： Philip J. Bos ,  Philip A. Johnson, Jr.

发明人： Philip J. Bos ,  Philip A. Johnson, Jr.

IPC分类号： G02F1/13 ,  G02F1/03 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/137 ,  G02F1/139 ,  G09F9/00 ,  G09F9/35 ,  G09F9/46 ,  G09G3/18 ,  H04N9/12 ,  H04N9/30

CPC分类号： G02F1/1395 ,  G02F1/133533 ,  G02F1/1392 ,  G02F1/03

摘要： A field sequential color display system incorporates a color switch which includes a zero to half-wave optical retarder and pleochroic filters to provide an image with high color contrast and resolution over a broad range of display sizes. In a preferred embodiment, a liquid crystal cell which operates between two states of optical retardation comprises the variable retarder to provide a color switch with substantially reduced optical response times.

摘要翻译： 场顺序彩色显示系统包括一个彩色开关，其包括零到半波光学延迟器和多色滤光器，以在宽范围的显示尺寸上提供高色彩对比度和分辨率的图像。 在优选实施例中，在两个光学延迟状态之间工作的液晶单元包括可变延迟器，以提供具有显着降低的光学响应时间的彩色开关。

公开(公告)号：US5714970A

公开(公告)日：1998-02-03

申请号：US347529

申请日：1994-11-30

申请人： Philip J. Bos ,  Philip A. Johnson, Jr.

发明人： Philip J. Bos ,  Philip A. Johnson, Jr.

IPC分类号： G02F1/133 ,  G02F1/03 ,  G02F1/1335 ,  G02F1/1347 ,  G02F1/23 ,  G09F9/46 ,  G09G3/36

CPC分类号： G02F1/13473 ,  G02F1/0322 ,  G02F1/133533

摘要： A switchable color filter (11) includes three polarizing filters (12, 14, and 16) and two zero to substantially half-wave optical retarders (36 and 38) and is incorporated in a field sequential display system (10) to provide output states of light of three different colors to form an image in full color. Each one of four preferred embodiments (11, 11a, 11b, and 11c) of the switchable color filter provides the output states of three colors. The third and fourth preferred embodiments (11b and 11c) provide a fourth additional output state of, respectively, white light and light of a color which is a combination of two of the other output state colors. The optical retarders comprise nematic liquid crystal cells (100) having fast relaxation times to operate the display system at video rates.

摘要翻译： 可切换滤色器（11）包括三个偏振滤光器（12,14和16）和两个零到基本上为半波长的光学延迟器（36和38），并且被并入场顺序显示系统（10）中以提供输出状态 的三种不同颜色的光，以形成全色的图像。 可切换彩色滤光片的四个优选实施例（11,11a，11b和11c）中的每一个提供三种颜色的输出状态。 第三和第四优选实施例（11b和11c）分别提供作为其它两种输出状态颜色的组合的颜色的白光和光的第四附加输出状态。 光学延迟器包括具有快速松弛时间的向列液晶单元（100），以以视频速率操作显示系统。

公开(公告)号：US5550662A

公开(公告)日：1996-08-27

申请号：US404794

申请日：1995-03-15

申请人： Philip J. Bos

发明人： Philip J. Bos

IPC分类号： G02F1/1335 ,  G02F1/13363 ,  G02F1/137 ,  G02F1/139

CPC分类号： G02F1/1395 ,  G02F1/133634 ,  G02F1/133514 ,  G02F2203/30

摘要： A color liquid crystal display (LCD) includes many ones of a color cell triad (150) of liquid crystal cells (80R, 80G, 80B) and a negative birefringence compensator plate (110). The color cell triads are positioned between a pair of linear polarizers (112, 114), and each color cell triad is in optical association with colored filters (152R, 152G, 152B). Each of the liquid crystal cells has a symmetrical director field (82, 82') that produces a symmetrical but nonuniform color viewing circle curve (100) from the liquid crystal cell. The negative birefringence plate restores the color viewing angle uniformity. When graphed on a polar plot, the measured light transmission percentage curves (120, 122, 124) characterizing the LCD are substantially concentric circles surrounding the optical axis (18) for all azimuthal angles (28) and viewing angles (24) up to 30 degrees. Thus, the color LCD provides a multi-color display having colors that are perceptibly uniform over a wide range of azimuthal and viewing angles.

摘要翻译： 彩色液晶显示器（LCD）包括许多液晶单元（80R，80G，80B）和负双折射补偿板（110）的彩色单元三元组（150）。 彩色单元三元组位于一对线性偏振器（112,114）之间，并且每个彩色单元三元组与彩色滤光片（152R，152G，152B）光学关联。 每个液晶单元具有从液晶单元产生对称但不均匀的彩色观察圆曲线（100）的对称导向器场（82,82'）。 负双折射板恢复彩色视角均匀性。 当绘制在极坐标图上时，表征LCD的测量的光透射百分比曲线（120,122,124）对于所有方位角（28）和视角（24）至多30°都是围绕光轴（18）的大致同心圆 度。 因此，彩色LCD提供具有在宽范围的方位角和视角上感知均匀的颜色的多色显示器。

公开(公告)号：US5387920A

公开(公告)日：1995-02-07

申请号：US412021

申请日：1989-08-18

申请人： Philip J. Bos ,  Philip A. Johnson, Jr.

发明人： Philip J. Bos ,  Philip A. Johnson, Jr.

IPC分类号： G02F1/133 ,  G02F1/03 ,  G02F1/1335 ,  G02F1/1347 ,  G02F1/23 ,  G09F9/46 ,  G09G3/36

CPC分类号： G02F1/13473 ,  G02F1/0322 ,  G02F1/133533

摘要： A switchable color filter (11) includes three polarizing filters (12, 14, and 16) and two zero to substantially half-wave optical retarders (36 and 38) and is incorporated in a field sequential display system (10) to provide output states of light of three different colors to form an image in full color. Each one of four preferred embodiments (11, 11a, 11b, and 11c) of the switchable color filter provides the output states of three colors. The third and fourth preferred embodiments (11b and 11c) provide a fourth additional output state of, respectively, white light and light of a color which is a combination of two of the other output state colors. The optical retarders comprise nematic liquid crystal cells (100) having fast relaxation times to operate the display system at video rates.

摘要翻译： 可切换滤色器（11）包括三个偏振滤光器（12,14和16）和两个零到基本上为半波长的光学延迟器（36和38），并且被并入场顺序显示系统（10）中以提供输出状态 的三种不同颜色的光，以形成全色的图像。 可切换彩色滤光片的四个优选实施例（11,11a，11b和11c）中的每一个提供三种颜色的输出状态。 第三和第四优选实施例（11b和11c）分别提供作为其它两种输出状态颜色的组合的颜色的白光和光的第四附加输出状态。 光学延迟器包括具有快速松弛时间的向列液晶单元（100），以以视频速率操作显示系统。

公开(公告)号：US08300189B2

公开(公告)日：2012-10-30

申请号：US12459153

申请日：2009-06-26

申请人： Ke Zhang ,  Philip J. Bos ,  Robert J. Twieg ,  Na Liu

发明人： Ke Zhang ,  Philip J. Bos ,  Robert J. Twieg ,  Na Liu

IPC分类号： G02F1/1337 ,  G02F1/1333

CPC分类号： G02F1/133711 ,  G02F2001/133738 ,  G02F2001/133742 ,  Y10T428/1005 ,  Y10T428/1018 ,  Y10T428/1023

摘要： Provided is a liquid crystal (LC) device and method thereof. The device comprises (i) a body of liquid crystal, (ii) a first layer comprising a first material, and (iii) a second layer comprising a second material; wherein the first layer is located between the body of liquid crystal and the second layer; the first layer alone aligns the liquid crystal in a first orientation; the second layer alone aligns the liquid crystal in a second orientation; and the first orientation is different from the second orientation. With optimized first layer thickness, the invention can be used in sensor applications to improve detection sensitivity, and in LCD applications with enhanced control over LC pretilt transition.

摘要翻译： 提供一种液晶（LC）装置及其方法。 该装置包括（i）液晶体，（ii）包含第一材料的第一层，和（iii）包含第二材料的第二层; 其中所述第一层位于所述液晶体和所述第二层之间; 第一层单独将液晶以第一取向对准; 第二层单独使第二取向的液晶对准; 并且第一取向与第二取向不同。 通过优化的第一层厚度，本发明可以用于传感器应用中，以提高检测灵敏度，并且在液晶显示应用中可以增强对LC预倾斜转换的控制。