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    Ferrolectric liquid crystal devices having improved operating properties by using an electronic mask
    1.
    发明授权
    Ferrolectric liquid crystal devices having improved operating properties by using an electronic mask 失效
    通过使用电子掩模具有改进的操作性能的铁电液晶装置

    公开(公告)号：US5111320A

    公开(公告)日：1992-05-05

    申请号：US619411

    申请日：1990-11-29

    申请人： Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull ,  Joseph F. Stephany ,  Andras I. Lakatos ,  Ram S. Narang

    发明人： Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull ,  Joseph F. Stephany ,  Andras I. Lakatos ,  Ram S. Narang

    IPC分类号： G02F1/1343 ,  G02F1/141

    CPC分类号： G02F1/134309 ,  G02F1/141 ,  G02F2201/122

    摘要： A light shutter is provided wherein a first plate which includes a pixel electrode for use in applying a includes a background electrode located adjacent the pixel voltage potential across a ferroelectric material also electrode and substantially surrounding the pixel electrode, whereby an electronic mask can be created adjacent the pixel electrode in the ferroelectric material. A second plate which, along with the first plate sandwiches the ferroelectric material, includes a backplane electrode which is used in conjunction with the pixel and background electrodes on the first plate for applying voltage potentials across the ferroelectric material. By maintaining a minimal amount of spacing between the background electrode and the pixel electrode, a voltage potential can be applied between the background and backplane electrodes so that the ferroelectric material located adjacent the pixel electrode can be maintained in, for example, a non-light transmissive state whereby the contrast between the pixel and inter-pixel regions is greatly improved. Image bars or displays can be formed by arranging a plurality of light shutters (and consequently, pixel electrodes) on the first plate with one or more background electrodes surrounding the plurality of pixel electrodes. Additionally, the background electrode and/or other electrodes can be used for applying electric fields to the ferroelectric material which are non-parallel to the polarization direction of the molecules of the ferroelectic material to reduce the time required to change the ferroelectric material between light transmissive and light blocking states.

    摘要翻译： 提供了一种光闸，其中包括用于施加的像素电极的第一板包括邻近铁电材料电极并且基本上围绕像素电极的像素电压电位附近的背景电极，由此可以相邻地形成电子掩模 铁电材料中的像素电极。 与第一板夹着铁电材料一起的第二板包括背板电极，其与第一板上的像素和背景电极结合使用，以跨越铁电体材料施加电压电位。 通过在背景电极和像素电极之间保持最小量的间隔，可以在背景电极和背板电极之间施加电压电位，使得位于像素电极附近的铁电材料可以保持在例如非光 透射状态，从而大大提高像素和像素间区域之间的对比度。 可以通过在多个像素电极周围设置一个或多个背景电极而在第一板上布置多个光快门（以及因此的像素电极）来形成图像条或显示器。 此外，背景电极和/或其他电极可以用于向铁电材料施加电场，铁电材料不与铁电材料的分子的偏振方向平行，以减少在透光性之间改变铁电材料所需的时间 和阻光状态。

    Control of liquid crystal devices
    2.
    发明授权
    Control of liquid crystal devices 失效
    控制液晶装置

    公开(公告)号：US5177475A

    公开(公告)日：1993-01-05

    申请号：US630205

    申请日：1990-12-19

    申请人： Joseph F. Stephany ,  Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull

    发明人： Joseph F. Stephany ,  Joseph J. Wysocki ,  Sui K. Hark ,  Virgil J. Hull

    IPC分类号： G02F1/1333 ,  G02F1/1337 ,  G06K15/12 ,  G09G3/36

    CPC分类号： G06K15/1252 ,  G02F1/133711 ,  G09G3/3629 ,  G09G3/3685 ,  G02F1/133345 ,  G09G2310/06 ,  G09G2310/061

    摘要： Liquid crystal devices are provided with a DC current blocking layer which improves the lifetime of the liquid crystal device and also permits the use of two-level drivers, thus reducing the complexity of the driving scheme necessary to address the liquid crystal devices. Preferably, the blocking layer is the alignment layer which is made from poly-para-xylylene having a thickness sufficient to act as a DC blocking layer. Additionally, specific driving schemes for driving liquid crystal devices are provided. When the liquid crystal device includes a material which relaxes when no voltage is applied thereto (e.g., a nematic material), the information signal is entirely removed from alternating time frames during which the liquid crystal device is addressed. When the liquid crystal device includes a ferroelectric material, an arbitrarily large voltage potential is applied to the electrodes located on one side of the ferroelectric material for a first portion of a dwell time so that the pixels of the liquid crystal device are easily cleared of any previous information.

    摘要翻译： 液晶装置设置有DC电流阻挡层，其提高了液晶装置的寿命，并且还允许使用两级驱动器，从而降低了解决液晶装置所需的驱动方案的复杂性。 优选地，阻挡层是由具有足以充当DC阻挡层的厚度的聚对二甲苯制成的取向层。 另外，提供了用于驱动液晶装置的具体驱动方案。 当液晶装置包括当没有电压施加到其上时放松的材料（例如向列型材料）时，信息信号完全从液晶装置寻址的交替时间帧中移除。 当液晶装置包括铁电体材料时，对于驻留时间的第一部分，位于铁电材料一侧的电极施加任意大的电压电位，使得液晶装置的像素容易清除任何 以前的信息。

    Voltage drop correction for ink jet printer
    3.
    发明授权
    Voltage drop correction for ink jet printer 失效
    喷墨打印机的电压降校正

    公开(公告)号：US5497174A

    公开(公告)日：1996-03-05

    申请号：US209050

    申请日：1994-03-11

    申请人： Joseph F. Stephany ,  Juan J. Becerra ,  Thomas P. Courtney ,  Gary A. Kneezel ,  Richard V. LaDonna ,  Peter J. John ,  Thomas E. Watrobski ,  Joseph J. Wysocki

    发明人： Joseph F. Stephany ,  Juan J. Becerra ,  Thomas P. Courtney ,  Gary A. Kneezel ,  Richard V. LaDonna ,  Peter J. John ,  Thomas E. Watrobski ,  Joseph J. Wysocki

    IPC分类号： B41J2/05

    CPC分类号： B41J2/04568 ,  B41J2/04573 ,  B41J2/0458 ,  B41J2/04588

    摘要： An apparatus and method compensates for a voltage drop of electrical pulse signals selectively applied to a plurality of heater elements on a printhead of an ink jet printing device. A number of heater elements to be pulsed at a given time is determined and a time duration of each of the pulse signals is selected based on information including the determined number of heater elements to be pulsed. In another aspect, the position on the printhead of the heater elements to be pulsed is determined and the time duration of the pulse signals is selected further based on the determined position. By varying the time duration of the pulse signals applied to the heater elements, a voltage drop across the heater elements due to the number of heater elements simultaneously pulsed and/or the position of the heater elements on the printhead is compensated for, maintaining reliable jetting performance while minimizing the voltage by which operating printing voltage needs to exceed the threshold printing voltage.

    摘要翻译： 一种装置和方法补偿了选择性地施加到喷墨打印装置的打印头上的多个加热器元件的电脉冲信号的电压降。 确定在给定时间被脉冲的多个加热器元件，并且基于包括确定的要被脉冲的加热器元件的数量的信息来选择每个脉冲信号的持续时间。 在另一方面，确定要被脉冲的加热器元件的打印头上的位置，并且基于所确定的位置进一步选择脉冲信号的持续时间。 通过改变施加到加热器元件的脉冲信号的持续时间，补偿由于同时脉冲的加热器元件的数量和/或打印头上的加热器元件的位置而导致的加热器元件上的电压降，以保持可靠的喷射 同时最小化操作印刷电压需要超过阈值印刷电压的电压。

    Calibration system for a thermal ink-jet printer
    5.
    发明授权
    Calibration system for a thermal ink-jet printer 失效
    热喷墨打印机的校准系统

    公开(公告)号：US5519419A

    公开(公告)日：1996-05-21

    申请号：US198756

    申请日：1994-02-18

    申请人： Joseph F. Stephany ,  Gary A. Kneezel ,  Richard V. LaDonna ,  Thomas E. Watrobski ,  Joseph J. Wysocki ,  James Eaton

    发明人： Joseph F. Stephany ,  Gary A. Kneezel ,  Richard V. LaDonna ,  Thomas E. Watrobski ,  Joseph J. Wysocki ,  James Eaton

    IPC分类号： B41J2/205 ,  B41J2/05 ,  B41J2/12 ,  B41J2/21 ,  B41J29/393 ,  H04N1/407

    CPC分类号： B41J2/04563 ,  B41J2/0458 ,  B41J2/2128 ,  B41J2/2135 ,  B41J29/393 ,  H04N1/4076

    摘要： A thermal ink-jet printhead adapted to emit ink onto a print sheet is automatically adjusted. The printhead is caused to emit ink onto a sheet in a manner consistent with an image of a first density, and then substantially immediately caused to emit ink in the form of a first test pattern on the sheet. The density of the first test pattern on the sheet is measured. The printhead is caused to emit ink onto the sheet in a manner consistent with an image of a second density, and then substantially immediately caused to emit ink in the form of a second test pattern on the sheet. The density of the second test pattern on the sheet is measured. The densities of the first test pattern and the second test pattern are correlated with a function relating a characteristic of an image printed with the printhead to a temperature of the printhead.

    摘要翻译： 自动调节适于将墨喷射到打印纸上的热喷墨打印头。 使得打印头以与第一密度的图像一致的方式将墨喷射到片材上，然后基本上立即在片材上以第一测试图案的形式发出墨水。 测量片材上第一测试图案的密度。 使得打印头以与第二密度的图像一致的方式将墨喷射到片材上，然后基本上立即在片材上以第二测试图案的形式发出墨水。 测量片材上第二测试图案的密度。 第一测试图案和第二测试图案的密度与将打印头打印的图像的特性相关联的功能与打印头的温度相关联。

    Electronic spot size control in a thermal ink jet printer
    7.
    发明授权
    Electronic spot size control in a thermal ink jet printer 失效
    热喷墨打印机中的电子光点尺寸控制

    公开(公告)号：US5223853A

    公开(公告)日：1993-06-29

    申请号：US840239

    申请日：1992-02-24

    申请人： Joseph J. Wysocki ,  William G. Hawkins ,  Gary A. Kneezel ,  Richard V. LaDonna ,  Joseph F. Stephany ,  Thomas A. Tellier ,  Thomas E. Watrobski

    发明人： Joseph J. Wysocki ,  William G. Hawkins ,  Gary A. Kneezel ,  Richard V. LaDonna ,  Joseph F. Stephany ,  Thomas A. Tellier ,  Thomas E. Watrobski

    IPC分类号： B41J2/05 ,  B41J2/125 ,  G01D15/18

    CPC分类号： B41J2/04541 ,  B41J2/04563 ,  B41J2/0458 ,  B41J2/04593 ,  B41J2/2128

    摘要： A system controls an ink jet printing apparatus for propelling ink jet droplets on demand from a printhead having a plurality of drop ejectors. In the printhead, each ejector includes a heating element actuable in response to electrical input signals, each input signal having an amplitude and a time duration, selectably applied to the heating element to produce a temporary vapor bubble and cause a quantity of ink to be emitted for the creation of a mark on a copy sheet. The temperature of ink in the printhead is sensed, and a combination of power level and time duration of the electrical input signal for the heating element to result in a desired size of the mark of the copy sheet is selected, by entering the sensed temperature of the ink into a predetermined function relating the energy of the electrical input signal to the corresponding resulting size of the mark on the copy sheet.

    摘要翻译： 系统控制喷墨打印设备，用于根据需要从具有多个液滴喷射器的打印头推进喷墨滴。 在打印头中，每个喷射器包括可响应于电输入信号而致动的加热元件，每个输入信号具有可选择地施加到加热元件的振幅和持续时间，以产生暂时的蒸汽气泡并导致一定量的墨水被排出 用于在复印纸上创建标记。 感测到打印头中的墨水的温度，并且通过输入检测到的温度来选择加热元件的电输入信号的持续时间的组合以产生所需的复印纸的标记尺寸 油墨成为将电输入信号的能量与复印纸上的标记的相应结果尺寸相关联的预定功能。