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    • 4. 发明授权
    • Display and the method of driving the same
    • 显示及其驱动方法
    • US5337070A
    • 1994-08-09
    • US922397
    • 1992-07-31
    • Masaaki KitajimaIkuo HiyamaYoshiharu Nagae
    • Masaaki KitajimaIkuo HiyamaYoshiharu Nagae
    • G02F1/133G09G3/20G09G3/36G09G3/00
    • G09G3/2092G09G3/2011G09G3/3688G09G2310/027G09G2310/0297G09G3/3614
    • A method of driving a gray scale and a drive circuit therefor are provided in which the simplification and reduction of the operating speed of a circuit for generating display voltages in a matrix display device are promoted, and low cost and multi-color display of high minuteness are simultaneously realized. The display circuit for generating the display voltages is composed of an image signal processing circuit for dividing an input digital image signal into plural bit groups, a first display voltage generating circuit for generating the display voltages corresponding to the first bit group obtained by the division, a second display voltage generating circuit for generating the display voltages corresponding to the second bit group obtained by the division, and a line-at-a-time timing circuit. The first and second display voltage generating circuits are operated in parallel to combine the outputs thereof with one another, thereby to generate a gray scale displaying voltage.
    • 提供了一种驱动灰度的方法及其驱动电路,其中促进了在矩阵显示装置中产生显示电压的电路的操作速度的简化和降低,并且低成本和高色彩的多色显示 同时实现。 用于产生显示电压的显示电路由用于将输入数字图像信号分成多个位组的图像信号处理电路组成,用于产生与通过分割获得的第一位组相对应的显示电压的第一显示电压产生电路, 第二显示电压产生电路,用于产生与通过除法获得的第二位组相对应的显示电压,以及一个时间线定时电路。 第一和第二显示电压发生电路并联操作以将其输出彼此组合,从而产生灰度显示电压。
    • 5. 发明授权
    • Driving device and method for matrix-type display panel using guest-host
type phase transition liquid crystal
    • 使用宾主型相变液晶的矩阵型显示面板的驱动装置及方法
    • US4395709A
    • 1983-07-26
    • US258625
    • 1981-04-29
    • Yoshiharu NagaeMasaaki KitajimaHideaki Kawakami
    • Yoshiharu NagaeMasaaki KitajimaHideaki Kawakami
    • G02F1/133G09G3/36G09F9/32
    • G09G3/3629G09G2300/0486G09G2310/04G09G2310/06G09G2310/063
    • An apparatus and a method for driving a guest-host type phase transition liquid crystal in matrix is disclosed in which X and Y electrodes in matrix comprising a guest-host liquid crystal made by adding a pleochroic dye to the cholesteric-nematic phase transition liquid crystal or chiralnematic phase transition liquid crystal are impressed with an X electrode selecting voltage, an X electrode non-selecting voltage, a Y electrode selecting voltage and a Y electrode non-selecting voltage selectively thereby to apply a holding voltage for holding the display condition of the liquid crystal cells of the liquid crystal display elements and a write-in voltage for new write-in. The region where the display condition is to be erased is designated in the liquid crystal display panel. The X and Y electrodes in that region are impressed with the X electrode non-selecting voltage, the other Y electrodes are impressed with the Y electrode selecting voltage, the other X electrodes are impressed with an erasure holding voltage having a continuously repetitive pulse waveform including one cycle of the Y electrode non-selecting voltage and three cycles of Y electrode selecting voltage, so that the liquid crystal cells in the designated region are supplied with the erasure voltage and the other liquid crystal cells are supplied with the holding voltage, thus erasing the designated region alone.
    • 公开了一种用于驱动基体中的客体 - 主体型相变液晶的装置和方法,其中基体中的X和Y电极包括通过向胆甾醇向列相变液晶中加入多色染料制成的客体主体液晶 或手性向相相变液晶选择性地施加X电极选择电压,X电极非选择电压,Y电极选择电压和Y电极非选择电压,从而施加保持电压以保持显示条件 液晶显示元件的液晶单元和用于新写入的写入电压。 在液晶显示面板中指定显示条件要被擦除的区域。 该区域中的X和Y电极被施加X电极非选择电压,其他Y电极被施加Y电极选择电压,其他X电极被施加具有连续重复脉冲波形的擦除保持电压,包括 Y电极非选择电压的一个周期和Y电极选择电压的三个周期,使得指定区域中的液晶单元被提供有擦除电压,并且其它液晶单元被提供保持电压,从而擦除 仅指定地区。