Diffractive spatial light modulator and display
    2.
    发明授权
    Diffractive spatial light modulator and display 失效
    衍射空间光调制器和显示器

    公开(公告)号:US06373549B1

    公开(公告)日:2002-04-16

    申请号:US09489078

    申请日:2000-01-21

    IPC分类号: G02F11335

    摘要: A diffractive spatial light modulator comprises first and second substrates (1, 2) between which an optical path is defined comprising, in order, first (8a,8b), second (5,6), and third (8a,8b) half wave retarders. The second retarder (6,5) has a fixed optic axis (9c) whereas the first and third retarders have switchable optic axes (9a,9b). The fixed optic axis (9c) is oriented outside the switching ranges of the switchable optic axes (9a,9b). The modulator is pixellated and each pixel comprises a switchable phase-only diffraction grating. Each pixel is switchable between a first mode in which incident light is output in the zeroth order diffraction lobe and a second mode in which incident light is deflected into higher order diffraction lobes. The spatial light modulator may be used in high brightness projection displays.

    摘要翻译: 衍射空间光调制器包括第一和第二基板(1,2),在其间定义光路,依次包括第一(8a,8b),第二(5,6)和第三(8a,8b)半波 缓凝剂 第二延迟器(6,5)具有固定的光轴(9c),而第一和第三延迟器具有可切换的光轴(9a,9b)。 固定光轴(9c)定向在可切换光轴(9a,9b)的切换范围之外。 调制器是像素化的,并且每个像素包括可切换的仅相位衍射光栅。 每个像素可在其中入射光在零阶衍射波瓣中输出的第一模式和入射光偏转到更高阶衍射波瓣的第二模式之间切换。 空间光调制器可以用在高亮度投影显示器中。

    Switchable liquid crystal devices
    7.
    发明授权
    Switchable liquid crystal devices 失效
    可切换液晶装置

    公开(公告)号:US6122024A

    公开(公告)日:2000-09-19

    申请号:US895360

    申请日:1997-07-16

    摘要: A switchable liquid crystal device, for instance for use as a reflective display, includes a cell containing a helical polymer network and a nematic liquid crystal. Electrodes are provided for applying a field across the cell so as to switch between different optical states. In a reflective state, the cell reflects incident light within a waveband which is relatively insensitive to temperature variations. The device is formed by filling the cell with the liquid crystal and polymer precursor material and then cross-linking or polymerising, for instance by photopolymerisation, the precursor material to form the helical polymer network.

    摘要翻译: 例如,用作反射显示器的可切换液晶装置包括含有螺旋聚合物网络和向列型液晶的电池。 提供电极用于跨电池施加场,以便在不同的光学状态之间切换。 在反射状态下,电池将入射光反射在对温度变化相对不敏感的波段内。 该装置通过用液晶和聚合物前体材料填充电池,然后例如通过光聚合交联或聚合前体材料形成螺旋聚合物网络而形成。

    Ferroelectric liquid crystal display
    8.
    发明授权
    Ferroelectric liquid crystal display 失效
    铁电液晶显示屏

    公开(公告)号:US5507975A

    公开(公告)日:1996-04-16

    申请号:US266155

    申请日:1994-06-27

    摘要: A ferroelectric liquid crystal device having a pair of substrates each provided with voltage applying means, an orientation control layer formed on at least one of the substrates, and a layer of ferroelectric liquid crystal composition disposed between the pair of substrates, the ferroelectric liquid crystal composition comprising at least one compound (a) having an optically active group of the formula (I): ##STR1## at least one compound (b) which is reverse to the compound (a) in the direction of a helical pitch induced in a nematic phase and at least one liquid crystal compound (c) exhibiting a smectic C phase, the liquid crystal composition exhibiting at least a smectic C phase, smectic A phase and nematic phase.

    摘要翻译: 一种具有一对基板的铁电液晶装置,每个基板设置有电压施加装置,形成在至少一个基板上的取向控制层以及设置在该对基板之间的铁电液晶组合物层,铁电液晶组合物 包含至少一种具有式(I)的光学活性基团的化合物(a):(I)至少一种与化合物(a)相反的化合物(b)在螺旋桨诱导的方向上 在向列相和至少一种显示近晶相C的液晶化合物(c)中,该液晶组合物至少表现出近晶C相,近晶A相和向列相。