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    Method and apparatus for driving a liquid crystal display panel
    2.
    发明授权
    Method and apparatus for driving a liquid crystal display panel 失效
    用于驱动液晶显示面板的方法和装置

    公开(公告)号：US5307084A

    公开(公告)日：1994-04-26

    申请号：US863379

    申请日：1992-04-03

    申请人： Hisashi Yamaguchi ,  Yoshiya Kaneko ,  Munehiro Haraguchi ,  Hiroshi Murakami ,  Takayuki Hoshiya ,  Tetsuya Kobayashi ,  Kazuhiro Takahara

    发明人： Hisashi Yamaguchi ,  Yoshiya Kaneko ,  Munehiro Haraguchi ,  Hiroshi Murakami ,  Takayuki Hoshiya ,  Tetsuya Kobayashi ,  Kazuhiro Takahara

    IPC分类号： G09G3/36

    CPC分类号： G09G3/3696 ,  G09G3/3622 ,  G09G2320/0209

    摘要： In a driver circuit of direct drive matrix type LCD panel, a quantity of ON-STATE cells (or OFF-STATE cells) displayed on the just previous scan electrode is counted and a quantity of ON-STATE cells (or OFF-STATE cells) to be displayed on a present scan electrode is also counted. A compensation voltage is generated according to a predetermined relation based on a difference of the two above-counted quantities, and is superposed onto drive voltages of unselected scan electrodes or of each of data electrodes, in a polarity that an undesirable spike voltage induced on unselected cell voltage is cancelled, in synchronization with selection of the present scan electrode. The compensation voltage may be generated according to a digital difference of the two quantities or to a change in an analog voltage representing the counted quantity. The above-described relation of the compensation voltage versus the counted quantity difference may be proportional or may be given with a predetermined specific relation to meet the panel characteristics. The compensation voltage may be a flat voltage during the period for selecting the single scan electrode or may be of a spike waveform. Amplitude of this spike is determined by the above-described predetermined relation. An irregular panel brightness caused from spike voltages induced from data electrode voltage application is cancelled.

    摘要翻译： 在直接驱动矩阵型LCD面板的驱动电路中，对刚刚扫描电极上显示的一定数量的ON状态单元（或OFF状态单元）进行计数，并将ON状态单元（或OFF-STATE单元） 也显示在当前扫描电极上。 基于两个上述计数量的差异，根据预定关系产生补偿电压，并以非选择的扫描电极或每个数据电极的驱动电压叠加在非选择的不期望的尖峰电压的极性 与当前扫描电极的选择同步地消除电池电压。 补偿电压可以根据两个数量的数字差或与表示计数量的模拟电压的变化产生。 补偿电压与计数量差的上述关系可以是成比例的或者可以以预定的特定关系给出以满足面板特性。 在用于选择单个扫描电极的周期期间，补偿电压可以是平坦的电压，或者可以是尖峰波形。 该尖峰的幅度由上述预定关系决定。 由数据电极电压施加引起的尖峰电压导致的不规则面板亮度被取消。

    Active-matrix liquid crystal display and method of driving same
    3.
    发明授权
    Active-matrix liquid crystal display and method of driving same 失效
    有源矩阵液晶显示及其驱动方法

    公开(公告)号：US6040814A

    公开(公告)日：2000-03-21

    申请号：US647685

    申请日：1996-05-13

    申请人： Hiroshi Murakami ,  Koji Yoshioka ,  Keizo Morita ,  Masafumi Itokazu ,  Ken-ichi Nakabayashi ,  Akira Yamamoto ,  Munehiro Haraguchi

    发明人： Hiroshi Murakami ,  Koji Yoshioka ,  Keizo Morita ,  Masafumi Itokazu ,  Ken-ichi Nakabayashi ,  Akira Yamamoto ,  Munehiro Haraguchi

    IPC分类号： G02F1/136 ,  G02F1/133 ,  G02F1/1368 ,  G09G3/20 ,  G09G3/36 ,  H01L29/786

    CPC分类号： G09G3/3648 ,  G09G2310/0248 ,  G09G2310/0297 ,  G09G2320/0209 ,  G09G3/3614 ,  G09G3/3659 ,  G09G3/3688

    摘要： An active-matrix LCD causes no cross-talk even if the capacitance between a given cell and adjacent data lines is large. The LCD has a liquid crystal panel which has data lines arranged in parallel with one another, scan lines arranged orthogonally to the data lines, and liquid crystal cells arranged at the intersections of the data and scan lines, respectively. Each of the cells has a cell electrode and a switching device that is arranged between and connected to the cell electrode and a corresponding one of the data lines. The conduction of the switching device is controlled in response to a scan pulse applied to a corresponding one of the scan lines. The LCD also has a data driver for applying data signals to the data lines, respectively, so that the data signals are written to corresponding ones of the cells, and a scan driver for applying the scan pulse sequentially to the scan lines. The data driver applies positive and negative signals that are opposite to each other with respect to a reference level, to each of the data lines within the period of the scan pulse, to zero an effective voltage applied to each data line. As a result, a voltage sustained by any cell to which data has been written is not affected by voltages successively applied to a data line to which the cell is connected and a data line to which the cell is capacitively connected.

    摘要翻译： 即使给定单元和相邻数据线之间的电容较大，有源矩阵LCD也不会引起串扰。 LCD具有液晶面板，其具有彼此平行布置的数据线，与数据线正交布置的扫描线和分别布置在数据和扫描线的交点处的液晶单元。 每个单元具有单元电极和布置在单元电极之间并连接到单元电极和相应的一个数据线的开关器件。 响应于施加到对应的一条扫描线的扫描脉冲来控制开关装置的导通。 LCD还具有用于将数据信号分别施加到数据线的数据驱动器，使得将数据信号写入相应的单元，以及用于将扫描脉冲顺序地应用于扫描线的扫描驱动器。 数据驱动器将相对于基准电平彼此相反的正和负信号施加到扫描脉冲周期内的每个数据线，以将施加到每个数据线的有效电压归零。 结果，已经写入数据的任何单元所持续的电压不受连续施加到单元连接的数据线的电压和单元电容连接的数据线的影响。

    Liquid-crystal display device having checkout circuit
    4.
    发明授权
    Liquid-crystal display device having checkout circuit 失效
    具有检测电路的液晶显示装置

    公开(公告)号：US06064222A

    公开(公告)日：2000-05-16

    申请号：US910657

    申请日：1997-08-13

    申请人： Keizo Morita ,  Munehiro Haraguchi ,  Koji Yoshioka ,  Masafumi Itokazu ,  Hiroshi Murakami

    发明人： Keizo Morita ,  Munehiro Haraguchi ,  Koji Yoshioka ,  Masafumi Itokazu ,  Hiroshi Murakami

    IPC分类号： G01R31/00 ,  G02F1/133 ,  G02F1/136 ,  G02F1/1368 ,  G09G3/00

    CPC分类号： G09G3/006

    摘要： A liquid-crystal display device includes a substrate with a pixel area including a plurality of scanning buses, a plurality of data buses intersecting therewith and pixel transistors and pixel electrodes formed at the intersections therebetween; a scanning driver for energizing these scanning buses; and a data driver for presenting these data buses with data signals. A checkout circuit equipped with a plurality of checkout transistors connected to the corresponding data buses or scanning buses; an input bus for applying prescribed checkout signals to the plurality of checkout transistors; and an output bus for picking up the signals from the plurality of checkout transistors.

    摘要翻译： 液晶显示装置包括具有包括多个扫描总线的像素区域，与其相交的多个数据总线和形成在其间的交叉处的像素晶体管和像素电极的基板; 用于激励这些扫描总线的扫描驱动器; 以及用于使用数据信号呈现这些数据总线的数据驱动器。 一个装配有连接到相应数据总线或扫描总线的多个检出晶体管的检验电路; 输入总线，用于向多个检出晶体管施加规定的检验信号; 以及用于拾取来自多个检出晶体管的信号的输出总线。

    Active matrix liquid crystal display and method of driving the same
    5.
    发明授权
    Active matrix liquid crystal display and method of driving the same 失效
    有源矩阵液晶显示及其驱动方法

    公开(公告)号：US06222516B1

    公开(公告)日：2001-04-24

    申请号：US08833468

    申请日：1997-04-07

    申请人： Masami Oda ,  Munehiro Haraguchi ,  Tadahisa Yamaguchi ,  Kazuhiro Takahara ,  Akira Yamamoto

    发明人： Masami Oda ,  Munehiro Haraguchi ,  Tadahisa Yamaguchi ,  Kazuhiro Takahara ,  Akira Yamamoto

    IPC分类号： G09C336

    CPC分类号： G09G3/3648 ,  G09G3/3655 ,  G09G2300/043 ,  G09G2320/0209 ,  G09G2320/0223

    摘要： A liquid crystal display has a liquid crystal layer, first and second electrodes, and a third electrode. The liquid crystal layer is inserted between the first and second electrodes to define liquid crystal cells. The third electrode is capacitively coupled with one of the first and second electrodes. A correction voltage for correcting distortion of a waveform for driving one of the first and second electrodes is applied to the third electrode, to keep an effective voltage applied to the liquid crystal cells unchanged and improve the display quality of the liquid crystal display. Therefore, the liquid crystal display of the present invention can correct distortion of a common voltage and prevent crosstalk.

    摘要翻译： 液晶显示器具有液晶层，第一和第二电极以及第三电极。 液晶层插入在第一和第二电极之间以限定液晶单元。 第三电极与第一和第二电极中的一个电容耦合。 用于校正用于驱动第一和第二电极之一的波形的失真的校正电压被施加到第三电极，以保持施加到液晶单元的有效电压不变并且提高液晶显示器的显示质量。 因此，本发明的液晶显示器可以校正公共电压的失真并防止串扰。