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22 条记录 (耗时 0.026 秒)

    Switchable color filter
    4.
    发明申请
    Switchable color filter 失效
    可切换滤色片

    公开(公告)号：US20050099373A1

    公开(公告)日：2005-05-12

    申请号：US10415713

    申请日：2001-11-01

    申请人： Jurg Funfschilling ,  Klaus Schmitt ,  Martin Schadt

    发明人： Jurg Funfschilling ,  Klaus Schmitt ,  Martin Schadt

    IPC分类号： G02B5/20 ,  G02B5/30 ,  G02F1/13 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/23 ,  H04N9/31 ,  G09G3/36

    CPC分类号： H04N9/3117 ,  G02B5/3016 ,  G02F1/133533 ,  G02F1/133536 ,  G02F1/13473 ,  G02F1/23 ,  G02F2001/133543 ,  G02F2001/133638 ,  G02F2201/343 ,  G02F2203/34

    摘要： A liquid crystal switchable color filter switches between three color bands and is preferably used for time-sequential devices, such as projection devices, direct view displays and video cameras. The color filter may employ circularly polarizing selective reflection bands of at least four cholesteric filters together with three liquid crystal switches and related retarder layers. In one embodiment, the handedness of the second cholesteric is equal to the handedness of the third cholesteric filter and opposite to the handedness of the first and fourth cholesteric filter and, for the blocking state of a color band, the optic axis of the corresponding liquid crystal switch is parallel or perpendicular to the polarization direction. This concept leads to improved, excellent color saturation and requires less stringent production tolerances than in the prior art. Moreover, it advantageously allows overlapping color transmission bands thus improving the light efficiency.

    摘要翻译： 液晶可切换彩色滤光片在三个色带之间切换，优选用于诸如投影设备，直视图和摄像机的时序设备。 滤色器可以采用至少四个胆甾型滤光器的圆偏振选择反射带，以及三个液晶开关和相关的延迟器层。 在一个实施例中，第二胆甾醇的螺旋性等于第三胆甾型滤光器的螺旋性，并且与第一和第四胆甾型滤光器的螺旋性相反，并且对于色带的阻挡状态，相应液体的光轴 晶体开关平行或垂直于偏振方向。 该概念导致改进的优异的色饱和度，并且比现有技术要求的生产公差要小得多。 此外，其有利地允许重叠的彩色传输频带，从而提高光效率。

    Bistable ferroelectric liquid crystal cell
    7.
    发明授权
    Bistable ferroelectric liquid crystal cell 失效
    双稳态铁电液晶电池

    公开(公告)号：US6046789A

    公开(公告)日：2000-04-04

    申请号：US971176

    申请日：1997-11-17

    申请人： Jurg Funfschilling ,  Martin Schadt

    发明人： Jurg Funfschilling ,  Martin Schadt

    IPC分类号： G02F1/137 ,  C09K19/02 ,  G02F1/1335 ,  G02F1/141 ,  G02F1/13

    CPC分类号： C09K19/0225 ,  G02F1/141

    摘要： Known liquid crystal cells have a nematic liquid crystal configuration and, in accordance with this configuration, are referred to as TN or STN cells. It is true that such cells are adequate for many applications. However, their image quality is dependent to a very great extent on the user's angle of view. Furthermore, TN and STN cells require a continuously applied signal voltage if it is intended to display or store information on one. Bistable liquid crystal cells having a ferroelectric, chiral smectic liquid crystal layer do not have these disadvantages of nematic display cells. However, the commercial production of such bistable display cells has scarcely become established to date. This is in particular because they are not very suitable for reliably storing information or do not permit absolutely equivalent switching between the two bistable positions of the director. The invention now proposes a novel, bistable liquid crystal cell which avoids precisely these disadvantages. Starting from the SBFLC display cell disclosed in EP-A 0 405 346, the display cell according to the invention is distinguished in that its liquid crystal layer contains polymerized molecules and is formed, by treatment with light and an alternating electric field, in such a way that it has two equivalent, bistable switching states.

    摘要翻译： 已知的液晶单元具有向列型液晶结构，根据该结构，称为TN或STN单元。 这样的电池确实适用于许多应用。 然而，他们的图像质量在很大程度上取决于用户的观点。 此外，如果TN和STN单元旨在将信息显示或存储在一个上，则需要连续施加的信号电压。 具有铁电手性近晶液晶层的双稳态液晶单元不具有向列型显示单元的这些缺点。 然而，迄今为止，这种双稳态显示单元的商业生产几乎没有建立。 这特别是因为它们不太可靠地存储信息，或者不允许在导演的两个双稳态位置之间进行绝对等效的切换。 本发明现在提出了一种新颖的双稳态液晶单元，其精确地避免了这些缺点。 从EP-A 0 405 346中公开的SBFLC显示单元开始，根据本发明的显示单元的特征在于，其液晶层包含聚合分子，并且通过用光和交变电场处理形成在这样的 它具有两个等效的双稳态切换状态。

    Distorted helix ferroelectric liquid crystal cell
    9.
    发明授权
    Distorted helix ferroelectric liquid crystal cell 失效
    扭曲螺旋铁电液晶电池

    公开(公告)号：US5841504A

    公开(公告)日：1998-11-24

    申请号：US741451

    申请日：1996-10-31

    申请人： Jurg Funfschilling ,  Martin Schadt

    发明人： Jurg Funfschilling ,  Martin Schadt

    IPC分类号： G02F1/133 ,  G02F1/141 ,  G09G3/18 ,  G02F1/13 ,  G02F1/1343

    CPC分类号： G02F1/141 ,  G02F1/13306 ,  G02F2001/1414

    摘要： A distorted helix ferroelectric liquid crystal cell (DHF) is driven with a capacitance connected in series to the liquid crystal layer. Capacity is effected by either an external device (capacitor) or by incorporation of a insulator (dielectric) in the DHF cell. The value of the series capacity is typically smaller than about twice the capacity of the cell without the series capacitance. The capacitive drive circuit, DHF cell and method for driving the circuit and cell, function to shorten the switching times required by conventional cells.

    摘要翻译： 扭曲的螺旋铁电液晶单元（DHF）由与液晶层串联连接的电容驱动。 容量由外部设备（电容器）或通过在DHF单元中并入绝缘体（电介质）来实现。 串联容量的值通常小于没有串联电容的电池容量的大约两倍。 电容驱动电路，DHF单元以及用于驱动电路和单元的方法起到缩短常规单元所需的切换时间的作用。