公开(公告)号：US5546102A

公开(公告)日：1996-08-13

申请号：US484433

申请日：1995-06-07

Applicant: Terry J. Scheffer ,  Benjamin R. Clifton

Inventor： Terry J. Scheffer ,  Benjamin R. Clifton

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

CPC classification number: G09G3/3625 ,  G09G3/3622 ,  G09G3/2011 ,  G09G3/2014 ,  G09G3/2022

Abstract: Integrated driver circuitry including row and column signal generators addresses faster responding liquid crystal display panels (LCDs) so that video rate, high information content LCDs having time constants on the order of 50 ms or less are perceived as having improved contrast by limiting peak voltage levels across the pixels. In a preferred embodiment, a row signal generator includes a row signal function generator and row driver circuitry including a level shifter that delivers to each of the row electrodes a signal level corresponding to the row signal value at a time interval of a frame period. A column signal generator applies to each of the column electrodes a column signal having an amplitude that is determined by the row signals causing selections at a particular time interval and by pixel input data components of corresponding pixels defined by the overlap of the row and column electrodes. The amplitudes of multiple column signals are generated by multiple retrievals distributed over the frame period of each of the pixel input data components stored in memory sites.

Abstract translation: 包括行和列信号发生器的集成驱动器电路解决了更快响应的液晶显示面板（LCD），使得具有大约50ms或更小的时间常数的视频速率，高信息内容LCD被认为通过限制峰值电压电平具有改善的对比度 穿过像素 在优选实施例中，行信号发生器包括行信号函数发生器和行驱动器电路，行驱动器电路包括电平移位器，电平移位器以帧周期的时间间隔输出对应于行信号值的信号电平。 列信号发生器对每个列电极施加具有由在特定时间间隔引起选择的行信号确定的振幅的列信号，以及由行电极和列电极的重叠所限定的相应像素的像素输入数据分量 。 通过在存储在存储器位置中的每个像素输入数据组件的帧周期上分布的多个检索来生成多个列信号的幅度。

公开(公告)号：US5459495A

公开(公告)日：1995-10-17

申请号：US883002

申请日：1992-05-14

Applicant: Terry J. Scheffer ,  Arlie R. Conner ,  Benjamin R. Clifton

Inventor： Terry J. Scheffer ,  Arlie R. Conner ,  Benjamin R. Clifton

IPC: G02F1/133 ,  G09F9/00 ,  G09G3/20 ,  G09G3/36

CPC classification number: G09G3/2011 ,  G09G3/3622 ,  G09G3/3625 ,  G09G3/2014 ,  G09G3/2022

Abstract: Method and apparatus for providing gray level addressing for passive liquid crystal display (LCD) panels having overlapping row and column electrodes defining pixels are disclosed. Depending upon whether the rows are being addressed by "standard" or "Swift" addressing, the signals for applying to the column electrodes are determined by different calculations, in all of which modes the amplitudes of the column signals are related to the gray level desired to be displayed by the individual pixels. For a split interval system, column signals of appropriate amplitude and polarity are applied during different subintervals of a characteristic time interval of the display panel depending upon the method of addressing the rows. In the full interval mode, the column signals applied over a full time interval are based on the desired gray level of all the pixels in the column, adjusted to provide the proper rms voltage across all the pixels so that they display the desired gray levels.

Abstract translation: 公开了用于为具有重叠的行和列电极定义像素的无源液晶显示（LCD）面板提供灰度级寻址的方法和装置。 根据这些行是否被“标准”或“Swift”寻址来寻址，用于施加到列电极的​​信号由不同的计算确定，在所有这些模式中，列信号的幅度与期望的灰度级有关 由各个像素显示。 对于分割间隔系统，根据寻址行的方法，在显示面板的特征时间间隔的不同子间隔期间施加适当幅度和极性的列信号。 在全间隔模式下，在全时间间隔内施加的列信号基于列中所有像素的期望灰度级，被调整以提供跨所有像素的适当均方根电压，使得它们显示所需的灰度级。

公开(公告)号：US5420604A

公开(公告)日：1995-05-30

申请号：US58316

申请日：1993-05-03

Applicant: Terry J. Scheffer ,  Benjamin R. Clifton

Inventor： Terry J. Scheffer ,  Benjamin R. Clifton

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

CPC classification number: G09G3/3625 ,  G09G3/3622 ,  G09G3/2011 ,  G09G3/2014 ,  G09G3/2022

Abstract: An addressing method and apparatus addresses faster responding liquid crystal display panels (LCDs) so that video rate, high information content LCDs having time constants on the order of 50 ms or less are perceived as having improved contrast by limiting peak voltage levels across the pixels. In a preferred embodiment, a first set of LCD electrodes is continuously driven with signals each comprising a train of pulses that are periodic in time, have a common period T, are independent of the information to be displayed, and are preferably orthonormal. Plural column signals are generated from the collective information states of the pixels defined by the overlap with a second electrode pattern. Each column signal is proportional to the sum, obtained by considering each pixel in the column, of the exclusive- or (XOR) products of the logic level of the amplitude of each row signal times the logic level of the information state of the pixel corresponding to that row. Hardware implementation comprises an external video source, a controller that receives and formats video data and timing information, a storage device that stores display data, a row signal generator, a column signal generator, and at least one LCD panel. Alternative embodiments provide circuits to reduce the number of column voltage levels required to generate a displayed image.

Abstract translation: 寻址方法和装置解决了更快响应的液晶显示面板（LCD），使得具有大约50ms或更小的时间常数的视频速率，高信息内容LCD被认为通过限制像素上的峰值电压电平具有改善的对比度。 在优选实施例中，第一组LCD电极被连续驱动，每个信号包括在时间上是周期性的脉冲串，具有公共周期T，独立于要显示的信息，并且优选地是正交的。 从与第二电极图案的重叠限定的像素的集合信息状态生成多个列信号。 每列信号与通过考虑列中的每个像素获得的和每个行信号的幅度的逻辑电平的异或（XOR）乘积乘以对应于像素的信息状态的逻辑电平的和成比例 到那行 硬件实现包括外部视频源，接收和格式化视频数据和定时信息的控制器，存储显示数据的存储设备，行信号发生器，列信号发生器和至少一个LCD面板。 替代实施例提供用于减少生成显示图像所需的列电压电平数量的电路。

公开(公告)号：US4634229A

公开(公告)日：1987-01-06

申请号：US626380

申请日：1984-06-29

Applicant: Hermann Amstutz ,  Dieter Heimgartner ,  Meinolph Kaufmann ,  Terry J. Scheffer

Inventor： Hermann Amstutz ,  Dieter Heimgartner ,  Meinolph Kaufmann ,  Terry J. Scheffer

IPC: G02F1/17 ,  G02F1/139 ,  G02F1/13

CPC classification number: G02F1/1397

Abstract: A liquid crystal display based on the bistability effect, wherein the distance between the support plates is smaller than 10 .mu.m and the total twist of the liquid crystal is between 180.degree. and 360.degree., preferably about 270.degree.. Over the entire viewing area of the display, randomly distributed spacers are provided. Because of these measures, the range of the bistable action is so narrowed that the display can be driven with operating voltages outside this range, using conventional multiplexing techniques. A high degree of multiplexing with short switching times and excellent contrast is obtained. The range of viewing angles is very large and independent of the direction of illumination.

Abstract translation: 基于双稳态效应的液晶显示器，其中支撑板之间的距离小于10μm，液晶的总扭曲在180°至360°之间，优选约270°。 在显示器的整个观看区域上，提供随机分布的间隔物。 由于这些措施，双稳态动作的范围如此狭窄，使得可以使用传统的复用技术来使用超出该范围的工作电压来驱动显示。 获得了具有短切换时间和优异对比度的高复用度。 视角范围非常大，与照明方向无关。

公开(公告)号：US4608558A

公开(公告)日：1986-08-26

申请号：US534715

申请日：1983-09-22

Applicant: Hermann Amstutz ,  Meinolph Kaufmann ,  Terry J. Scheffer

Inventor： Hermann Amstutz ,  Meinolph Kaufmann ,  Terry J. Scheffer

IPC: G02F1/137 ,  G02F1/139 ,  G09G3/36 ,  G09G3/34

CPC classification number: G02F1/1391 ,  G02F1/13725 ,  G09G3/3629 ,  G09G3/3681 ,  G09G3/3692 ,  G09G2300/0486 ,  G09G2310/04 ,  G09G2310/062

Abstract: An addressing method for a multiplexable, bistable liquid crystal display wherein a first driving voltage which is larger than a first limiting voltage is applied to the selected display elements and a second driving voltage which is smaller than a second limiting voltage is applied to the non-selected display elements. For the first driving voltage only a first optical state is stable, and for the second driving voltage only a second optical state is stable. All the display elements are simultaneously switched on the display by means of a single writing voltage pulse. By this means a high-contrast, constant and immediate display is achieved over the entire active area. Row-at-a-time writing is also possible. Moreover, a liquid crystal display is introduced which is based upon the bistability effect and which employs a guest-host liquid crystal containing a chiral additive. The layer thickness of the liquid crystal is less than 10 .mu.m and the ratio of the layer thickness (d) to the liquid crystal pitch (p) of the guest-host liquid crystal lies between 0.5 and 1.75. Spacer particles are distributed over the entire active area of the display.

Abstract translation: 一种用于可复用双稳态液晶显示器的寻址方法，其中将大于第一限制电压的第一驱动电压施加到所选择的显示元件，并且将小于第二限制电压的第二驱动电压施加到非易失性存储器 选定的显示元素。 对于第一驱动电压，仅第一光学状态是稳定的，并且对于第二驱动电压，仅第二光学状态是稳定的。 所有显示元件通过单个写入电压脉冲同时在显示器上打开。 通过这种方式，在整个有效区域上实现了高对比度，恒定和立即的显示。 行一次写作也是可能的。 此外，引入基于双稳态效应的液晶显示器，并且采用含有手性添加剂的客体主体液晶。 液晶层的厚度小于10μm，客体液晶的层厚（d）与液晶间距（p）之比在0.5至1.75之间。 间隔粒子分布在显示器的整个有效区域上。

公开(公告)号：US4252417A

公开(公告)日：1981-02-24

申请号：US48084

申请日：1979-06-13

Applicant: Terry J. Scheffer ,  Hans R. Zeller

Inventor： Terry J. Scheffer ,  Hans R. Zeller

IPC: C09K19/54 ,  C09K19/60 ,  G02F1/1347 ,  G02F1/137 ,  G02F1/139 ,  G02F1/133

CPC classification number: G02F1/13725 ,  C09K19/36 ,  C09K19/60

Abstract: A liquid crystal display is described for displaying dark signs on a light background in accordance with the guest-host principle without polarizers. The display includes parallel plates the insides of which are provided with an orientation layer which produces a homoeotropic orientation in an adjacent liquid crystal mixture. The liquid crystal mixture is formed primarily of a nematic liquid crystal having a high negative dielectric anisotropy and, secondarily, of an optically active substance. The proportion of the optically active substance is smaller than the quantity which would cause a spontaneous formation of a twisted structure in the liquid crystal mixture in the field-free state. The liquid crystal mixture is thus homoeotropically oriented and transparent throughout in the field-free regions, and is planar-cholesteric and absorbing in the activated regions.

Abstract translation: 描述了一种液晶显示器，用于在没有偏振器的情况下根据客人主机在浅色背景上显示黑色符号。 显示器包括平行板，其内侧设置有在相邻液晶混合物中产生同方向取向的取向层。 液晶混合物主要由具有高负介电各向异性的向列型液晶形成，其次由光学活性物质形成。 光学活性物质的比例小于在无场态下在液晶混合物中自发形成扭曲结构的量。 因此，液晶混合物在无场区域中均匀定向和透明，并且在激活区域中是平面胆甾醇型和吸收型。

公开(公告)号：US4137193A

公开(公告)日：1979-01-30

申请号：US809276

申请日：1977-06-23

Applicant: Maged A. Osman ,  Terry J. Scheffer

Inventor： Maged A. Osman ,  Terry J. Scheffer

IPC: C09B29/00 ,  C09B31/06 ,  C09B35/06 ,  C09B35/14 ,  C09B55/00 ,  C09K19/60 ,  G02F1/13 ,  C09K3/34

CPC classification number: C09B29/00 ,  C09B29/0088 ,  C09B31/06 ,  C09B35/06 ,  C09B35/14 ,  C09B55/00 ,  C09K19/601

Abstract: In a cholesteric guest-host liquid crystal composition having a positive dielectric anisotropy and consisting of a nematic host component with a dye incorporated as a guest component therein and an optically active (cholesteric) component, the improvement consisting of a substantially stable and water insoluble azo dye guest component having a pleochroic ratio a.sub.1 /a.sub.2 of at least 6.5 and an absorption maximum in the range of from 350 to 700 nm, said azo dye being a compound of the formula (1)X -- A -- N .dbd. N -- B -- Y (I)wherein A is selected from the group consisting of 1,4-phenylene, 2-hydroxy-1,4-naphthylene and 2-hydroxy-8-amino-1,4-naphthylene; B is selected from the group consisting of 1,4-phenylene, 1,5-naphthylene and 5-substituted benzothiazo-(1,3)-2-yl; X is selected from the group consisting of nitro, nitrile, dimethylamino, di(hydroxyethyl)-amino, phenyl and straight chain C.sub.1 -C.sub.10 alkyl, and Y is a monovalent organic radical that does not promote water solubility in the dye molecule.

Abstract translation: 在具有正介电各向异性并由向列主体成分组成的胆酰型客体主体液晶组合物中，其中引入作为客体成分的染料和光学活性（胆甾型）组分，其改进包括基本稳定的水不溶性偶氮 所述偶氮染料是式（1）的化合物，X-A-N = N-B - 的化合物，其中多色性比a1 / a2至少为6.5，吸收最大值为350-700nm， Y（I）其中A选自1,4-亚苯基，2-羟基-1,4-亚萘基和2-羟基-8-氨基-1,4-亚萘基; B选自1,4-亚苯基，1,5-亚萘基和5-取代的苯并噻唑 - （1,3）-2-基; X选自硝基，腈，二甲基氨基，二（羟乙基） - 氨基，苯基和直链C1-C10烷基，Y是不促进染料分子中水溶性的一价有机基团。

公开(公告)号：US08820937B2

公开(公告)日：2014-09-02

申请号：US13403766

申请日：2012-02-23

Applicant: Jesper Osterman ,  Terry J. Scheffer

Inventor： Jesper Osterman ,  Terry J. Scheffer

IPC: G03B21/14

CPC classification number: G02B27/26 ,  G02B27/2264 ,  G02F1/13471 ,  G02F1/1393 ,  G02F1/1396 ,  H04N9/3167 ,  H04N13/337 ,  H04N13/341 ,  H04N13/363

Abstract: An optical polarization state modulator assembly for use in a stereoscopic three-dimensional image projection system includes a spatial light modulator, a light source emitting multiple wavelength components of light for incidence on the spatial light modulator, and a projection lens. A polarization converter system cooperates with the spatial light modulator to produce in alternating sequence polarized light carrying first and second perspective view images of a scene in different ones of first and second subframes. A polarization modulator, in response to first and second drive signals, imparts to, respectively, the image-carrying polarized light a first output polarization state during the first subframe and to the image-carrying polarized light a second output polarization state during the second subframe. The image-carrying polarized light in the first and second output polarization states propagates through the projection lens for transmission to an observer.

Abstract translation: 用于立体三维图像投影系统的光偏振态调制器组件包括空间光调制器，发射用于入射到空间光调制器的光的多个波长分量的光源和投影透镜。 偏振转换器系统与空间光调制器协作以交替顺序产生携带第一和第二子帧中不同的场景的第一和第二透视图像的偏振光。 响应于第一和第二驱动信号的偏振调制器在第二子帧期间分别赋予图像携带偏振光第一子帧期间的第一输出偏振状态和支持图像的偏振光的第二输出偏振状态 。 第一和第二输出偏振状态下的图像携带偏振光通过投影透镜传播，以传输给观察者。

公开(公告)号：US08085369B2

公开(公告)日：2011-12-27

申请号：US13164592

申请日：2011-06-20

Applicant: Terry J. Scheffer ,  Jiuzhi Xue

Inventor： Terry J. Scheffer ,  Jiuzhi Xue

IPC: G02F1/1333

CPC classification number: G02F1/133753 ,  G02F2001/133761 ,  G02F2001/134372 ,  G02F2001/1398

Abstract: Self-compensating, quasi-homeotropic liquid crystal devices overcome the contrast reducing effects of smaller pretilt angles. The devices exhibit extremely high contrast ratio but at the same time suppress fringe field-induced disclination lines in high pixel density and small pixel size quasi-homeotropic displays. The surface pretilt and cell twist angles are set at values that, in combination, contribute to establishing a cuspate singularity in the contrast ratio for normally incident light in response to a drive signal switching the liquid crystal device to the OFF director field state that provides nearly 0% optical efficiency. The OFF director field state corresponds to a subthreshold drive level that provides for the liquid crystal device self-compensation for in-plane optical retardation. Setting the cell gap (“d”) to provide substantially 100% optical efficiency in response to a value of the drive signal switching the liquid crystal device to the ON director field state achieves optimal dynamic range for the liquid crystal device.

Abstract translation: 自补偿准准垂直液晶装置克服了较小预倾斜角的对比度降低效果。 器件表现出非常高的对比度，同时抑制高像素密度和小像素大小准垂直显示器中的条纹场引发的旋错线。 表面预倾斜和单元扭曲角被设定为这样的值，其组合有助于响应于将液晶装置切换到提供近似的OFF导向器场状态的驱动信号，在正常入射光的对比度中建立尖点奇点 0％光学效率。 OFF导向器场状态对应于提供液晶装置对面内光学延迟的自补偿的亚阈值驱动电平。 设置单元间隙（“d”）以响应于将液晶装置切换到导通器磁场状态的驱动信号的值来提供基本上100％的光学效率，从而实现了液晶装置的最佳动态范围。

公开(公告)号：US07990600B2

公开(公告)日：2011-08-02

申请号：US11569498

申请日：2005-05-24

Applicant: Jonathan A. Sachs ,  Howard V. Goetz ,  David Keith ,  Lin Li ,  Steven H. Linn ,  Alexander Parfenov ,  Stephen E. Brice ,  Terry J. Scheffer ,  James A. Van Vechten ,  Jiuzhi Xue

Inventor： Jonathan A. Sachs ,  Howard V. Goetz ,  David Keith ,  Lin Li ,  Steven H. Linn ,  Alexander Parfenov ,  Stephen E. Brice ,  Terry J. Scheffer ,  James A. Van Vechten ,  Jiuzhi Xue

IPC: G02F1/03

CPC classification number: G02F1/1354 ,  G02B27/1026 ,  G02B27/1046 ,  G02B27/145 ,  G02B27/149 ,  G02F2203/01 ,  H04N9/3105

Abstract: An optically addressed, photoconductive spatial light modulator (SLM) operates in a transmissive mode and is capable of modulating a wide spectrum of visible light. There is no pixel structure or native pixel resolution in the SLM. The SLM has no photodiodes and does not rectify. A light projection system (100) in which one or more SLMs (128, 130, 132) are placed includes a write (image definition) UV light path (102) and a read (illumination) visible light path (104) to form a color image projection display. The write UV light propagates from an image display pattern source (120) and either sequentially or continuously writes image patterns on the photoconductive SLMs. The read visible light propagates through the SLM and is modulated by an electro-optical material, the optical properties of which change in response to the image structure carried by the write light. The result is a high efficiency display system that delivers high resolution color images through a projection lens (190) onto a display screen.

Abstract translation: 光学寻址的光导空间光调制器（SLM）以透射模式工作，并且能够调制宽范围的可见光。 在SLM中没有像素结构或本机像素分辨率。 SLM没有光电二极管，不能纠正。 其中放置一个或多个SLM（128,130,132）的光投射系统（100）包括写入（图像清晰）UV光路（102）和读取（照明）可见光路径（104），以形成 彩色图像投影显示。 写入UV光从图像显示图案源（120）传播，并且顺序地或连续地将图像图案写在光电导SLM上。 读取的可见光通过SLM传播并被电光材料调制，电光材料的光学特性响应于由写入光携带的图像结构而改变。 结果是高效率显示系统，其通过投影透镜（190）将高分辨率彩色图像传送到显示屏上。