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    Method of and apparatus for addressing a ferroelectric liquid crystal device and a ferroelectric liquid crystal device
    31.
    发明公开
    Method of and apparatus for addressing a ferroelectric liquid crystal device and a ferroelectric liquid crystal device 失效
    用于寻址的铁电液晶显示器，铁电液晶显示器的方法和装置

    公开(公告)号：EP0838802A3

    公开(公告)日：1998-07-29

    申请号：EP97307638.3

    申请日：1997-09-29

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Towler, Michael John ,  Tagawa, Akira ,  Bonnet, Paul

    IPC分类号： G09G3/36

    CPC分类号： G09G3/3629 ,  G09G3/2051 ,  G09G3/207 ,  G09G3/2074 ,  G09G2310/06 ,  G09G2310/061

    摘要： A ferroelectric liquid crystal device, such as a display panel, has a plurality of pixels arranged as rows and columns in a passive matrix arrangement. Each pixel has a plurality of switching thresholds, for instance by having different regions (7, 8) of different thicknesses, so as to provide a plurality of grey levels. A voltage waveform is applied to each pixel for switching it to a desired grey level. A blanking pulse of a first polarity is applied to reset the pixel to a reset grey level. This is followed by a compensating pulse (20) of polarity opposite the first polarity, after which a waveform for selecting the desired grey level is provided. The effect of the compensating pulse (20) is to reduce the effect of τmin shift so as to provide a relatively wide driving window (13) to allow more reliable selection of an intermediate grey level.

    Liquid crystal devices
    33.
    发明公开
    Liquid crystal devices 失效
    液晶器件

    公开(公告)号：EP0816906A2

    公开(公告)日：1998-01-07

    申请号：EP97304496.9

    申请日：1997-06-25

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Tillin, Martin David ,  Towler, Michael John

    IPC分类号： G02F1/139 ,  G02F1/1347

    CPC分类号： G02F1/13471 ,  G02F1/1395 ,  G02F1/1396

    摘要： A twisted liquid crystal device comprising a liquid crystal layer (112) and first and second alignment layers (104) disposed in opposite sides of the liquid crystal layer (112). The first and second alignment layers (108,110) having respective alignment directions (126,128) which are mutually inclined. A first linear polariser (114) is disposed on the opposite side of the first alignment layer (108) to the liquid crystal layer (112). Electrodes (104,106) apply a variable voltage across the liquid crystal layer (112) which has a twisted liquid crystal structure and is arranged for operation in surface switching mode with first and second regions (112a,112b) of the liquid crystal layer (112) adjacent the alignment layers (108,110) being mutually optically de-coupled so as to define, within the liquid crystal layer in use, a pair of separate, active optical retarders having mutually inclined optic axes.

    摘要翻译： 一种扭曲液晶装置，包括液晶层（112）和设置在液晶层（112）相对两侧的第一和第二取向层（104）。 第一和第二取向层（108,110）具有相互倾斜的对应方向（126,128）。 第一线偏振器（114）设置在第一取向层（108）的与液晶层（112）相反的一侧上。 电极（104,106）在具有扭曲液晶结构的液晶层（112）上施加可变电压，并布置成与液晶层（112）的第一和第二区域（112a，112b）以表面切换模式操作， 相邻的取向层（108,110）相互光学分离，以便在使用中的液晶层内限定具有相互倾斜的光轴的一对独立的有源光学延迟器。

    Twisted nematic liquid crystal device
    34.
    发明公开
    Twisted nematic liquid crystal device 失效
    扭曲向列液晶器件

    公开(公告)号：EP0816905A2

    公开(公告)日：1998-01-07

    申请号：EP97304494.4

    申请日：1997-06-25

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Walton, Harry Garth ,  Towler, Michael John ,  Tillin, Martin David

    IPC分类号： G02F1/139

    CPC分类号： G02F1/1396 ,  G02F2001/13787

    摘要： A twisted nematic liquid crystal device has a liquid crystal layer 20 between a pair of alignment layers 22 and 24. Glass plates 30 and 32 with electrodes 26 and 28 are disposed on opposite sides of the layers 20, 22 and 24. The alignment layers 22 and 24 have their alignment directions disposed mutually perpendicular and at ±45° with respect to adjacent linear polarisers 34 and 36. The pretilt angle of liquid crystal molecules in a surface region 20a of the layer 20 adjacent the alignment layer 22 is different to that of liquid crystal molecules in a surface region 20c of the layer 20 adjacent the alignment layer 24 (Fig. 1).

    摘要翻译： 扭曲向列液晶器件在一对取向层22和24之间具有液晶层20.具有电极26和28的玻璃板30和32设置在层20,22和24的相对侧上。取向层22 和24的排列方向相对于相邻的线性偏振器34和36以相互垂直和±45°的方式布置。在与取向层22相邻的层20的表面区域20a中的液晶分子的预倾角不同于 液晶分子在邻近取向层24（图1）的层20的表面区域20c中。

    Driving circuit and method for liquid crystal array device
    35.
    发明公开
    Driving circuit and method for liquid crystal array device 失效
    液晶阵列装置的驱动电路及方法

    公开(公告)号：EP0809233A3

    公开(公告)日：1997-12-03

    申请号：EP97303371.5

    申请日：1997-05-16

    申请人： SHARP KABUSHIKI KAISHA ,  Secretary of State for Defence in Her Britannic Majesty's Gov. of the United Kingdom of Great Britain and Northern Ireland

    发明人： Towler, Michael John ,  Tagawa, Akira

    IPC分类号： G09G3/36

    CPC分类号： G09G3/3629 ,  G09G2310/06 ,  G09G2310/065 ,  G09G2320/041

    摘要： A liquid crystal array device (10) comprises a liquid crystal material contained between two substrates (12, 20), a first and a second plurality of electrodes (16, 22) defining a plurality of pixels and driving circuitry (18, 26, 28) for applying a first signal (Strobe Voltage) in succession to the first plurality of electrodes and for applying a plurality of second signals (Data Voltage) to each of the second plurality of electrodes. Each second signal comprises one of at least a first waveform (a) and a second waveform (b) and the first waveform and the second waveform each comprise first and second signal levels. The first waveform (a) and the second waveform (b) further comprise at least one portion at a third signal level different from the first and second signal levels. This provides a limited difference in heating effect upon the array between a signal comprising a plurality of first waveforms (a, a, a, a etc.) and an alternating succession of first and second waveforms (a, b, a, b, a, b etc.).

    摘要翻译： 液晶阵列装置（10）包括包含在两个基板（12,20）之间的液晶材料，限定多个像素的第一和第二多个电极（16,22）以及驱动电路（18,26,28） ）用于将第一信号（选通电压）连续地施加到第一多个电极并将多个第二信号（数据电压）施加到第二多个电极中的每一个。 每个第二信号包括至少第一波形（a）和第二波形（b）中的一个，并且第一波形和第二波形各自包括第一和第二信号电平。 第一波形（a）和第二波形（b）还包括处于与第一和第二信号电平不同的第三信号电平的至少一部分。 这提供了在包括多个第一波形（a，a，a，a等）的信号与第一波形和第二波形（a，b，a，b，a）的交替连续之间的阵列上的加热效果的有限差异 ，b等）。

    Display and method of operating a display
    36.
    发明公开
    Display and method of operating a display 失效
    Anzeige und ihr Ansteuerungsverfahren

    公开(公告)号：EP0791848A2

    公开(公告)日：1997-08-27

    申请号：EP97301054.9

    申请日：1997-02-19

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Bonnett, Paul ,  Towler, Michael John ,  Tagawa, Akira

    IPC分类号： G02F1/1335 ,  G02F1/1343

    CPC分类号： G09G3/3629 ,  G02F1/133528 ,  G02F2001/133531 ,  G02F2001/134345 ,  G09G3/2007 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2320/041

    摘要： A liquid crystal display comprises a matrix of pixels 7, for instance formed at the intersections of data electrodes 1 and split strobe electrodes 2 and 3. Each pixel 7 is divided into first and second sub-pixels 8 and 9. The first sub-pixels 8 have parallel input and output polarisers 31, 34 whereas the second sub-pixels 9 have perpendicular input and output polarisers 31, 35. In order to address an intermediate grey level, the sub-pixels 8 and 9 are switched to the grey level. Variations in the grey levels of the sub-pixels 8 and 9, for instance caused by temperature variations, act in opposite directions so that the average grey level of the whole pixel 7 varies relatively little.

    摘要翻译： 液晶显示器包括像素7的矩阵，例如形成在数据电极1和分割选通电极2和3的交点处。每个像素7被分成第一和第二子像素8和9.第一子像素 8具有并行输入和输出偏振器31,34，而第二子像素9具有垂直的输入和输出偏振器31,35。为了寻址中间灰度级，子像素8和9被切换到灰度级。 子像素8和9的灰度级的变化，例如由温度变化引起的，以相反的方向起作用，使得整个像素7的平均灰度级变化相对较小。