公开(公告)号：US20140340589A1

公开(公告)日：2014-11-20

申请号：US13897004

申请日：2013-05-17

申请人： Kent Displays Incorporated

发明人： Erica Montbach ,  John Krinock ,  Asad Khan

IPC分类号： G02F1/1333

CPC分类号： G02F1/13336 ,  G02F1/13718 ,  G02F2202/28 ,  G09G2300/0486

摘要： A cholesteric liquid crystal writing board display device includes a plurality of cholesteric liquid crystal writing tablets and a front cover layer extending over the cholesteric liquid crystal writing tablets. The cholesteric liquid crystal writing tablets are tiled together by the front cover layer such that the writing board display device appears nearly seamless. Or, the writing tablets can be spaced apart from each other.

摘要翻译： 胆甾型液晶书写板显示装置包括多个胆甾型液晶书写片和在胆甾型液晶书写片上延伸的前盖层。 胆甾型液晶书写片通过前盖层平铺在一起，使得书写板显示装置看起来几乎无缝。 或者，书写片可以彼此间隔开。

公开(公告)号：US20130342488A1

公开(公告)日：2013-12-26

申请号：US13927647

申请日：2013-06-26

申请人： Kent Displays Incorporated

发明人： Tod Schneider ,  Oleg Pishnyak ,  Andrew DeMiglio ,  Mark Lightfoot

IPC分类号： G06F3/041

CPC分类号： G06F3/0416 ,  B43L1/00

摘要： A display device includes a cholesteric liquid crystal writing tablet and a piezoelectric transducer. The piezoelectric transducer is subjected to a mechanical force that generates a voltage that is applied to the writing tablet that erases writing on the writing tablet or a portion thereof. A further feature is a display device comprising a cholesteric liquid crystal display and a piezoelectric transducer. The piezoelectric transducer is subjected to a mechanical force that generates a voltage that is applied to the display that places the display or a portion thereof in at least one of a color reflective planar state, a substantially transparent focal conic state and a gray scale state. Also featured is a method of erasing a cholesteric liquid crystal writing tablet.

摘要翻译： 显示装置包括胆甾型液晶书写板和压电换能器。 压电换能器受到产生施加到书写片上的电压的机械力，该电压擦除书写片剂或其一部分上的书写。 另一个特征是包括胆甾型液晶显示器和压电换能器的显示装置。 压电换能器经受机械力，其产生施加到显示器的电压，其将显示器或其一部分放置在彩色反射平面状态，基本上透明的焦点锥形状态和灰度状态中的至少一个中。 还有一种擦除胆甾型液晶书写片的方法。

公开(公告)号：US09946106B2

公开(公告)日：2018-04-17

申请号：US14678482

申请日：2015-04-03

申请人： Kent Displays Incorporated

发明人： Clinton Braganza ,  Matthew Schlemmer ,  Erica Montbach ,  Asad Khan

IPC分类号： G02F1/1335 ,  G02F1/1333 ,  G02F1/137 ,  B43L1/00 ,  B43L1/12

CPC分类号： G02F1/13338 ,  B43L1/004 ,  B43L1/12 ,  B43L1/123 ,  G02F1/133514 ,  G02F1/133553 ,  G02F1/133555 ,  G02F1/13718 ,  G02F2001/133374

摘要： An electronic display includes electrically conductive layers. An active layer is disposed between adjacent electrically conductive layers. The active layer includes cholesteric liquid crystal material. At least one transparent front substrate is disposed adjacent one of the electrically conductive layers near a front of the display. A semitransparent back layer absorbs light that passes through the active layer, reflects grey light or light of a color and is light transmitting. Electronic circuitry applies a voltage to the conductive layers that enables at least one of erasing or writing of the active layer.

公开(公告)号：US09229259B2

公开(公告)日：2016-01-05

申请号：US13897004

申请日：2013-05-17

申请人： Kent Displays Incorporated

发明人： Erica Montbach ,  John Krinock ,  Asad Khan

IPC分类号： G02F1/1335 ,  G02F1/1333 ,  G02F1/137

CPC分类号： G02F1/13336 ,  G02F1/13718 ,  G02F2202/28 ,  G09G2300/0486

摘要： A cholesteric liquid crystal writing board display device includes a plurality of cholesteric liquid crystal writing tablets and a front cover layer extending over the cholesteric liquid crystal writing tablets. The cholesteric liquid crystal writing tablets are tiled together by the front cover layer such that the writing board display device appears nearly seamless. Or, the writing tablets can be spaced apart from each other.

摘要翻译： 胆甾型液晶书写板显示装置包括多个胆甾型液晶书写片和在胆甾型液晶书写片上延伸的前盖层。 胆甾型液晶书写片通过前盖层平铺在一起，使得书写板显示装置看起来几乎无缝。 或者，书写片可以彼此间隔开。

公开(公告)号：US20040145548A1

公开(公告)日：2004-07-29

申请号：US10352496

申请日：2003-01-28

申请人： KENT DISPLAYS INCORPORATED

发明人： Nick Martin Miller IV

IPC分类号： G09G003/36

CPC分类号： G09G3/3629 ,  G09G2300/0486 ,  G09G2310/06 ,  G09G2320/0233

摘要： Reflective chiral nematic liquid crystal material is disposed between a first set of electrodes and a second set of electrodes arranged on opposed sides of the material to define a collection of pixels. Fast updating dynamic drive scheme is implemented by selectively applying an electric field via the electrodes through the pixels in four phases of energization: preparation, selection, evolution, and non-select. Each phase is made up of a series of voltages having varying amplitudes. The voltage waveform is for each phase controlled based on the selection phase to achieve image uniformity. For example, the evolution voltages that are established across adjacent pixels having the same final state have initial amplitudes that are equal for both pixels to increase image uniformity.

摘要翻译： 反射手性向列液晶材料设置在第一组电极和布置在材料的相对侧上的第二组电极之间以限定像素的集合。 通过选择性地通过电极通过像素在通电四个阶段中选择性地施加电场来实现快速更新动态驱动方案：准备，选择，演化和非选择。 每相由一系列具有变化幅度的电压组成。 电压波形用于基于选择阶段控制的每个相位，以实现图像均匀性。 例如，在具有相同最终状态的相邻像素之间建立的演变电压具有对于两个像素相等的初始幅度以增加图像均匀性。

公开(公告)号：US20020109661A1

公开(公告)日：2002-08-15

申请号：US09780737

申请日：2001-02-09

申请人： Kent Displays Incorporated

发明人： Chris Blackson ,  Todd Ernst ,  Xiao-Yang Huang

IPC分类号： G09G003/36

CPC分类号： G09G3/3629 ,  G09G3/2018 ,  G09G3/2081 ,  G09G2300/0486

摘要： A method of addressing a bistable liquid crystal material having incremental reflectance properties disposed between opposed substrates is disclosed. One substrate has a first plurality of electrodes deposited thereon facing a second substrate which has a second plurality of electrodes disposed thereon. The intersection of the first and second plurality of electrodes forms a plurality of pixels. The addressing method includes applying a predetermined number of pulses to the first plurality of electrodes, and applying a like number of the predetermined number of pulses to the second plurality of electrodes. Each of the predetermined number of pulses has a different frequency, wherein the predetermined number of pulses are applied in a set time period.

摘要翻译： 公开了一种在相对的基板之间设置具有增加的反射率特性的双稳态液晶材料的寻址方法。 一个基板具有沉积在其上的第一多个电极，面对第二基板，第二基板上设置有第二多个电极。 第一和第二多个电极的交点形成多个像素。 寻址方法包括将预定数量的脉冲施加到第一多个电极，以及将相同数量的预定数量的脉冲施加到第二多个电极。 预定数量的脉冲中的每一个具有不同的频率，其中在设定的时间段内施加预定数量的脉冲。

公开(公告)号：US10287503B2

公开(公告)日：2019-05-14

申请号：US15160767

申请日：2016-05-20

申请人： KENT DISPLAYS INCORPORATED

发明人： Erica N. Montbach ,  Asad A. Khan ,  Mauricio Echeverri ,  Clinton I. Braganza

IPC分类号： C09K19/02 ,  C09K19/54 ,  G02F1/1334 ,  G02F1/137

摘要： An enhanced brightness cholesteric liquid crystal eWriter device for writing and drawing includes substrates and electrically conductive layers disposed on the substrates. There is a gap, d, between the electrically conductive layers. Polymer dispersed cholesteric liquid crystal material is disposed in the gap. The polymer dispersed cholesteric liquid crystal material exhibits a written reflectance, R, which occurs in response to pressure applied to one of the substrates that changes reflectance of the cholesteric liquid crystal material. The device follows the relationship Rd1 d2, where Rd2 is a written reflectance of an eWriter device of gap d2 and Rd1 is written reflectance of another eWriter device of gap d1. Further, a cholesteric liquid crystal eWriter device includes a layer of cholesteric liquid crystal material in a cell gap, d, wherein d

公开(公告)号：US10088701B2

公开(公告)日：2018-10-02

申请号：US14069901

申请日：2013-11-01

申请人： Kent Displays Incorporated

发明人： Asad Khan ,  Mauricio Echeverri ,  Erica Montbach

IPC分类号： G02F1/1333 ,  G02F1/137 ,  G06F1/16 ,  G06F3/0354 ,  G06F3/041

摘要： A cholesteric liquid crystal (ChLC) electronic writing device incorporates a dot pattern recognition system. When writing pressure is applied to the writing device an image composed of writing or drawing is displayed by a pressure sensitive ChLC polymer dispersion stacked in a multilayer system of the device. A specialized stylus with sensor and associated electronics is used to form the image on the electronic writing device. The stylus produces electrical information indicating the path or trajectory of the writing that is displayed by the electronic writing device, which can be transferred via wireless signal to any other displaying device. This forms a replica image on the displaying device that is a replica of the image on the electronic writing device.

公开(公告)号：US09927672B2

公开(公告)日：2018-03-27

申请号：US14971094

申请日：2015-12-16

申请人： KENT DISPLAYS INCORPORATED

发明人： Clinton Braganza ,  Mauricio Echeverri ,  Asad Khan ,  Erica Montbach

IPC分类号： G02F1/137 ,  G02F1/133 ,  G02F1/1334 ,  G02F1/1335 ,  G02F1/139 ,  G02F1/1333

CPC分类号： G02F1/137 ,  G02F1/13306 ,  G02F1/133305 ,  G02F1/13338 ,  G02F1/1334 ,  G02F1/133555 ,  G02F1/13718 ,  G02F1/1391 ,  G02F2203/02 ,  G02F2203/05 ,  G02F2203/34

摘要： A multicolored pressure sensitive liquid crystal device includes a first transparent substrate that is flexible on which pressure is applied and a second substrate spaced apart from the first substrate. Also included are electrically conductive layers, one of which is in contact with the first substrate and is transparent and another of which is in contact with the second substrate. The electrically conductive layers are separated from each other. Also included is a pressure sensitive liquid crystal layer including cholesteric liquid crystal disposed between the electrically conductive layers. The liquid crystal layer includes at least first and second color regions. The first color region reflects light of a first color and the second color region reflects light of a second color. The pressure applied to the substrate results in a change in reflectance of the liquid crystal. In another aspect, the liquid crystal layer can include at least first and second regions that differ from each other in terms of a characteristic selected from the group consisting of wavelength of reflection, reflectivity, linewidth, electrooptic response, pressure sensitivity and combinations thereof.

公开(公告)号：US20150286085A1

公开(公告)日：2015-10-08

申请号：US14243432

申请日：2014-04-02

申请人： Kent Displays Incorporated

发明人： Don Davis ,  Forrest Nicholson

IPC分类号： G02F1/137 ,  G02F1/1334 ,  G02F1/1335 ,  G06F1/16 ,  G02F1/133 ,  G02F1/1333

CPC分类号： G02F1/13718 ,  G02F1/13338 ,  G02F1/1334 ,  G02F2001/133374 ,  G06F3/0412 ,  H01L2223/544

摘要： A liquid crystal display with an identifier such as a watermark, serial number, logo or other graphic design, is disclosed. The identifiers can be read electronically or with the human eye. Methods are described for fabricating identifiers on cholesteric writing tablets in particular, with varying shades of gray and hence different degrees of visibility. The identifiers are permanent and not erased when a liquid crystal image on the display is erased.

摘要翻译： 公开了具有诸如水印，序列号，标志或其它图形设计的标识符的液晶显示器。 标识符可以用电子方式或人眼读取。 描述了用于在胆甾醇书写片上制造标识符的方法，特别是具有不同的灰度和因此不同程度的可视性。 当清除显示器上的液晶图像时，标识符是永久性的，不会被擦除。