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    Active matrix light modulators, use of an active matrix light modulator, and display
    1.
    发明公开
    Active matrix light modulators, use of an active matrix light modulator, and display 失效
    Lichtmodulatoren mit aktiver Matrix，Verwendung eines Lichtmodulators mit aktiver Matrix and Anzeige

    公开(公告)号：EP0875881A2

    公开(公告)日：1998-11-04

    申请号：EP98303334.1

    申请日：1998-04-29

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Gilmour, Sandra ,  Tillin, Martin David ,  Towler, Michael John ,  Robinson, Michael Geraint ,  Tombling, Craig ,  Mayhew, Nicholas

    IPC分类号： G09G3/36

    CPC分类号： G09G3/3651 ,  G09G3/2011 ,  G09G3/3413 ,  G09G3/3614 ,  G09G3/3648 ,  G09G2300/0823 ,  G09G2300/0842 ,  G09G2310/0235 ,  G09G2310/065 ,  G09G2320/041

    摘要： An active matrix light modulator, such as a thresholdless antiferroelectric active matrix liquid crystal display, comprises an active matrix of control elements 18 disposed at intersections of data lines 22 and scan lines 20, and an array 10 of pixels which are selectively addressable by data and scan signals applied to the control elements 18 by a data driver 12 and a scan driver 14. Such addressing is controlled so that a voltage is applied to each pixel during a corresponding addressing frame by the application of data and scan signals to an associated one of the control elements 18 in order to select the optical level of the pixel for each frame, and bipolar switching is applied to control the voltage applied to the pixel during successive subframes such that, when one optical level is selected for the frame, a positive voltage is applied to the pixel during one subframe of the frame and a negative voltage of equal magnitude but opposite polarity is applied to the pixel during another subframe of the frame and, when another optical level is selected for the frame, an intermediate voltage (preferably zero voltage) is applied to the pixel during both of the subframes of the frame, so as to provide DC balancing within the frame. The required grey level within each frame is accurately reproduced and is substantially independent of the previous state of the pixel. The use of such modulators to reduce the effects of asymmetrical optical performance and colour-sequential displays are also disclosed.

    摘要翻译： 诸如无阈值反铁电有源矩阵液晶显示器的有源矩阵光调制器包括设置在数据线22和扫描线20的交点处的控制元件18的有源矩阵和可由数据选择性地寻址的像素阵列10， 扫描信号由数据驱动器12和扫描驱动器14施加到控制元件18.这样的寻址被控制，使得在对应的寻址帧期间通过将数据和扫描信号施加到相关联的一个 控制元件18为了选择每帧的像素的光学电平，并且施加双极开关以控制在连续子帧期间施加到像素的电压，使得当对于帧选择一个光学电平时，正电压 在帧的一个子帧期间施加到像素，并且在anot期间将相同大小但相反极性的负电压施加到像素 她的帧的子帧，当帧的另一个光学级别被选择时，在该帧的两个子帧期间，将一个中间电压（优选为零电压）施加到像素，以便在该帧内提供直流平衡。 每个帧内所需的灰度级被精确地再现，并且基本上与像素的先前状态无关。 还公开了使用这种调制器来减少不对称光学性能和色顺显示器的影响。

    Reflective liquid crystal device
    2.
    发明公开
    Reflective liquid crystal device 审中-公开
    ReflektiveFlüssigkristallvorrichtung

    公开(公告)号：EP0909974A2

    公开(公告)日：1999-04-21

    申请号：EP98308272.8

    申请日：1998-10-12

    申请人： Sharp Kabushiki Kaisha

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

    IPC分类号： G02F1/1335

    CPC分类号： G02F1/13362 ,  G02F1/13363 ,  G02F1/1393 ,  G02F2001/13355 ,  G02F2203/02

    摘要： A reflective liquid crystal device comprises a polarising beam splitter 30 and a mirror 2 between which are disposed retarders 31, 32, 33. At least one of the retarders 32 is a liquid crystal element whose retardation is variable, or whose optic axis is switchable. In a DARK state of the device the retarders combine to rotate the plane of polarisation of light directed by the polarising beam splitter 30 towards a reflector 2 by n x 180°, where n is an integer. The light returned to the polarising beam splitter is therefore directed back towards the light source. In a BRIGHT state of the device, the retarder arrangement rotates the plane of polarisation of light directed by the polarising beam splitter 30 by 90° , and this light is transmitted by the polarising beam splitter.

    摘要翻译： 反射型液晶装置包括偏振分束器30和反射镜2，两者之间设置有延迟器31,32,33。延迟器32中的至少一个是相位差可变的或其光轴可切换的液晶元件。 在器件的暗态下，延迟器组合以使由偏振分束器30引导的光的偏振平面朝向反射器2旋转n×180°，其中n是整数。 因此，返回到偏振分束器的光被引导回到光源。 在装置的BRIGHT状态下，延迟器装置将由偏振分束器30引导的光的偏振平面旋转90°，并且该光被偏振分束器透射。

    Reflective liquid crystal device
    3.
    发明公开
    Reflective liquid crystal device 审中-公开
    反射型液晶装置

    公开(公告)号：EP0909974A3

    公开(公告)日：2000-03-29

    申请号：EP98308272.8

    申请日：1998-10-12

    申请人： Sharp Kabushiki Kaisha

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

    IPC分类号： G02F1/1335 ,  G02F1/1343 ,  G02F1/139

    CPC分类号： G02F1/13362 ,  G02F1/13363 ,  G02F1/1393 ,  G02F2001/13355 ,  G02F2203/02

    摘要： A reflective liquid crystal device comprises a polarising beam splitter 30 and a mirror 2 between which are disposed retarders 31, 32, 33. At least one of the retarders 32 is a liquid crystal element whose retardation is variable, or whose optic axis is switchable. In a DARK state of the device the retarders combine to rotate the plane of polarisation of light directed by the polarising beam splitter 30 towards a reflector 2 by n x 180°, where n is an integer. The light returned to the polarising beam splitter is therefore directed back towards the light source. In a BRIGHT state of the device, the retarder arrangement rotates the plane of polarisation of light directed by the polarising beam splitter 30 by 90° , and this light is transmitted by the polarising beam splitter.

    Active matrix light modulators, use of an active matrix light modulator, and display
    5.
    发明公开
    Active matrix light modulators, use of an active matrix light modulator, and display 失效
    光调制器使用具有有源矩阵显示器中的光调制器的有源矩阵和

    公开(公告)号：EP0875881A3

    公开(公告)日：2000-03-01

    申请号：EP98303334.1

    申请日：1998-04-29

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Gilmour, Sandra ,  Tillin, Martin David ,  Towler, Michael John ,  Robinson, Michael Geraint ,  Tombling, Craig ,  Mayhew, Nicholas

    IPC分类号： G09G3/36 ,  G09G3/34

    CPC分类号： G09G3/3651 ,  G09G3/2011 ,  G09G3/3413 ,  G09G3/3614 ,  G09G3/3648 ,  G09G2300/0823 ,  G09G2300/0842 ,  G09G2310/0235 ,  G09G2310/065 ,  G09G2320/041

    摘要： An active matrix light modulator, such as a thresholdless antiferroelectric active matrix liquid crystal display, comprises an active matrix of control elements 18 disposed at intersections of data lines 22 and scan lines 20, and an array 10 of pixels which are selectively addressable by data and scan signals applied to the control elements 18 by a data driver 12 and a scan driver 14. Such addressing is controlled so that a voltage is applied to each pixel during a corresponding addressing frame by the application of data and scan signals to an associated one of the control elements 18 in order to select the optical level of the pixel for each frame, and bipolar switching is applied to control the voltage applied to the pixel during successive subframes such that, when one optical level is selected for the frame, a positive voltage is applied to the pixel during one subframe of the frame and a negative voltage of equal magnitude but opposite polarity is applied to the pixel during another subframe of the frame and, when another optical level is selected for the frame, an intermediate voltage (preferably zero voltage) is applied to the pixel during both of the subframes of the frame, so as to provide DC balancing within the frame. The required grey level within each frame is accurately reproduced and is substantially independent of the previous state of the pixel. The use of such modulators to reduce the effects of asymmetrical optical performance and colour-sequential displays are also disclosed.