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    • 3. 发明授权
    • Liquid crystal cell with opaque mask for printing device
    • 具有不透明面罩的液晶盒用于打印装置
    • US4810062A
    • 1989-03-07
    • US136426
    • 1987-12-16
    • Kenji AokiMitsuo NagataHaruo NakamuraTeiji Miura
    • Kenji AokiMitsuo NagataHaruo NakamuraTeiji Miura
    • G02F1/13G02F1/133G02F1/1343G06K15/12G03B21/22
    • G06K15/1252G02F1/133G02F1/13439
    • A high-speed responsive liquid crystal optical device with improved light transmissivity is provided. The device includes a liquid crystal panel including an optically active liquid crystal material having dielectric anisotropy which becomes zero at a crossing frequency ("fc") of 100 KHz or below. The dielectric anisotropy of the liquid crystal is positive at frequencies lower than fc ("fl") and negative at frequencies higher than fc ("fh"). Crossed polarizers are disposed on each side of the liquid crystal panel. A liquid crystal driving circuit selectively applies a signal of a frequency fh to open the device and a signal of a frequency fl to close the device.The optical device is particularly well suited for use as a light valve in a printer device. Response time within 1 m sec. permits a printing speed of 10 prints of A4 size to be produced per minute with a resolving power of about 10 dots per 1 m/m. This amounts to a printing speed of approximately 500 lines in one second with each line being written into m sec. or less. The optically active nematic liquid crystal is a composition comprising a optically inactive nematic liquid crystal and an optically active liquid crystal material added thereto.
    • 提供了具有改善的光透射率的高速响应液晶光学装置。 该装置包括具有介电各向异性的光学活性液晶材料的液晶面板,其在交叉频率(“fc”)为100KHz以下为零。 在低于fc(“fl”)的频率下,液晶的介电各向异性为正,在高于fc(“fh”)的频率处为负。 交叉偏振器设置在液晶面板的每一侧。 液晶驱动电路选择性地施加频率fh的信号以打开设备和频率f1的信号以关闭设备。 光学装置特别适合用作打印机装置中的光阀。 1 m秒内响应时间 允许每分钟产生10张A4尺寸的打印速度,每1m / m的分辨力约10点。 这相当于一秒钟内大约500行的打印速度,每行被写入m秒。 或更少。 光学活性向列型液晶是一种组合物,其包含光学惰性向列型液晶和添加到其中的光学活性液晶材料。
    • 5. 发明授权
    • Circuit for driving a liquid crystal display device
    • 用于驱动液晶显示装置的电路
    • US5159326A
    • 1992-10-27
    • US513338
    • 1990-04-20
    • Katsunori YamazakiMitsuo Nagata
    • Katsunori YamazakiMitsuo Nagata
    • G09G3/36
    • G09G3/3681G09G3/36G09G3/3696G09G2300/023G09G2320/0209G09G2320/0233G09G2320/0247G09G2320/041G09G3/3614
    • A mechanism for driving a matrix liquid crystal display which compensates for cross talk due to changes in temperature is provided. A matrix liquid crystal display has two substrates and a liquid crystal layer sandwiched between the two substrates. A group of common electrodes is formed on one substrate. A group of segment electrodes is formed on the other substrate. The common electrodes intersect with the segment electrode. A voltage is provided at the common electrodes and segment electrodes to produce a voltage waveform for driving the liquid crystal. A voltage waveform compensation circuit changes the voltages waveform in accordance with the pattern of drawings or characters to be displayed in the liquid crystal display device to produce the desired display and in accordance with at least one of an ambient temperature and a temperature of the liquid crystal display.
    • 提供一种用于驱动补偿由于温度变化引起的串扰的矩阵液晶显示器的机构。 矩阵液晶显示器具有两个基板和夹在两个基板之间的液晶层。 在一个基板上形成一组公共电极。 一组段电极形成在另一基板上。 公共电极与分段电极相交。 在公共电极和分段电极处提供电压以产生用于驱动液晶的电压波形。 电压波形补偿电路根据要显示在液晶显示装置中的图形或字符的图案来改变电压波形以产生所需的显示,并且根据液晶的环境温度和温度中的至少一个 显示。