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    • 1. 发明授权
    • Bistable nematic liquid crystal which remains tilted in first and second
states and which is tilted according to driving voltage
    • 双稳态向列液晶,其在第一和第二状态下保持倾斜并且根据驱动电压倾斜
    • US6038001A
    • 2000-03-14
    • US909540
    • 1997-08-12
    • Toshiomi OnoTetsushi YoshidaToshihiro Mannoji
    • Toshiomi OnoTetsushi YoshidaToshihiro Mannoji
    • G02F1/139G09G3/20G09G3/36G02F1/133
    • G09G3/2011G02F1/1391G09G3/3622G09G2300/0486G09G2300/0491
    • A liquid crystal display device comprises a pair of substrates opposing each other, each having an electrode and an aligning film on an inner surface, a layer of bistable nematic liquid crystal sealed in a space between substrate, and two polarizing plates. A reset pulse voltage high enough to align the molecules almost vertically to the substrates is applied to the layer of liquid crystal. Then, a first state-selecting pulse voltage lower than the reset pulse voltage is applied between the electrodes, whereby the molecules of the liquid crystal assume a first metastable aligned state. Alternatively, a second state-selecting pulse voltage lower than the reset pulse voltage is applied between the electrodes, whereby the molecules of the liquid crystal assume a second metastable aligned state. The liquid crystal molecules are tilted at an angle to the substrates in accordance with the effective value of the first state-selecting pulse voltage while remaining in the first metastable aligned state, and are tilted at a different angle to the substrates in accordance with the effective value of the second state-selecting pulse voltage while remaining in the second metastable aligned state.
    • 一种液晶显示装置,包括彼此相对的一对基板,每个基板在内表面上具有电极和取向膜,密封在基板之间的空间和两个偏振片之间的双稳态向列型液晶层。 施加高到足以使分子几乎垂直于衬底对齐的复位脉冲电压到液晶层。 然后,在电极之间施加低于复位脉冲电压的第一状态选择脉冲电压,由此液晶的分子呈现第一亚稳定位状态。 或者,在电极之间施加低于复位脉冲电压的第二状态选择脉冲电压,由此液晶的分子呈现第二亚稳定位状态。 根据第一状态选择脉冲电压的有效值,液晶分子在保持在第一亚稳定位状态的同时与基板倾斜一定角度,并且根据有效的方式与基板以不同的角度倾斜 第二状态选择脉冲电压的值,同时保持在第二亚稳定位状态。
    • 2. 发明授权
    • Liquid crystal display device having bistable nematic liquid crystal and
method of driving the same
    • 具有双稳向列型液晶的液晶显示装置及其驱动方法
    • US6057817A
    • 2000-05-02
    • US990789
    • 1997-12-15
    • Toshiomi OnoSoichi SatoTetsushi YoshidaToshihiro Mannoji
    • Toshiomi OnoSoichi SatoTetsushi YoshidaToshihiro Mannoji
    • G09G3/36
    • G09G3/3629G09G2300/0486G09G2300/0491G09G2310/04G09G2310/06G09G2320/0247
    • A liquid crystal cell includes scanning and signal electrodes, and a bistable nematic liquid crystal material sealed therein. The material has liquid crystal molecules alignable in first and second metastable aligned states by selective application of twist select voltages smaller than a reset voltage after application of the reset voltage. A tilt angle of the liquid crystal molecules is controlled in the first and second metastable aligned states in accordance with an effective value of a voltage applied between the opposing electrodes. A row driver, in accordance with display data, supplies a reset potential for applying the reset voltage between the electrodes, and a write-period voltage for designating a period for applying a voltage with an effective value according to the display data between the electrodes, to scanning electrodes. A data driver, in accordance with the display data, supplies a metastable-aligned-state selecting voltage for selectively applying a first metastable-aligned-state selecting voltage and a second metastable-aligned-state selecting voltage between the electrodes, and a write voltage corresponding to the voltage with the effective value according to the display data, to the signal electrodes in synchronism with the reset voltage and said write-period voltage.
    • 液晶单元包括扫描信号电极和密封在其中的双稳态向列型液晶材料。 通过在施加复位电压之后通过选择性地施加小于复位电压的扭转选择电压,该材料具有可在第一和第二亚稳对准状态下对准的液晶分子。 根据施加在相对电极之间的电压的有效值,液晶分子的倾斜角度被控制在第一和第二亚稳取向状态。 根据显示数据的行驱动器提供用于施加电极之间的复位电压的复位电位和用于指定用于根据电极之间的显示数据施加具有有效值的电压的周期的写周期电压, 到扫描电极。 根据显示数据的数据驱动器提供亚稳对准状态选择电压,用于选择性地施加电极之间的第一亚稳对准状态选择电压和第二亚稳对准状态选择电压,并且写入电压 对应于具有根据显示数据的有效值的电压,与复位电压和所述写周期电压同步的信号电极。
    • 5. 发明授权
    • Liquid crystal display device with liquid crystal elastic constant ratio
at least 1.75
    • 液晶显示装置的液晶弹性常数比至少为1.75
    • US5377028A
    • 1994-12-27
    • US178442
    • 1994-01-06
    • Tetsushi YoshidaToshiomi OnoJiro Takei
    • Tetsushi YoshidaToshiomi OnoJiro Takei
    • C09K19/02G02F1/13363G02F1/1347G02F1/139G02F1/133G02F1/13G02F1/1335
    • C09K19/0208G02F1/1397G02F1/13363G02F1/13471G02F2413/15
    • A liquid crystal display device includes a pair of substrates facing each, first and second electrodes formed on each inner surface of the substrates and arranged so that they are crossed and face each other, first and second aligning films covering each inner surface of the substrates and said first and second electrodes and provided with an aligning treatment in a direction respectively, and a liquid crystal member sealed between the substrates by a seal layer. The liquid crystal layer is twistingly aligned by the aligning force of said first and second aligning films at an angle of approx. 230.degree. to 250.degree., and has a positive dielectric anisotropy. The liquid crystal layer includes a liquid crystal member having a dielectric constant ratio .DELTA..epsilon./.epsilon..perp. defined as a ratio of the dielectric anisotropy .DELTA..epsilon. and the dielectric constant .epsilon..perp. with the direction orthogonal to the liquid crystal molecule axis of 2 or less, and a elastic constant ratio K.sub.33 /K.sub.11 defined as a ratio of a bent elastic constant K.sub.33 to a splay elastic constant K.sub.11 of 1.75 or more.
    • 一种液晶显示装置,包括:一对基板,面对各自的第一和第二电极,形成在基板的每个内表面上并且布置成使得它们交叉并面对彼此;第一和第二对准膜覆盖基板的每个内表面;以及 所述第一和第二电极分别在一个方向上设置对准处理,以及通过密封层密封在所述基板之间的液晶部件。 液晶层通过所述第一和第二取向膜的对准力以大约的角度被扭曲地对准。 230°至250°,具有正的介电各向异性。 液晶层包括具有介电常数比DELTAε/ε正交值的液晶部件,其定义为介电各向异性DELTAε和介电常数ε正交值与正交于液晶分子轴线的方向的比率为2或更小的比率, 以及弹性常数比K33 / K11,其定义为弯曲弹性常数K33与喷射弹性常数K11的比值为1.75以上。