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    • 47. 发明授权
    • Display device and its driving method, and projection-type display device
    • 显示装置及其驱动方法,投影型显示装置
    • US07173592B2
    • 2007-02-06
    • US10450347
    • 2002-10-10
    • Junichi YamashitaKatsuhide Uchino
    • Junichi YamashitaKatsuhide Uchino
    • G09G3/36
    • G09G3/3688G09G2320/0209
    • An object of the present invention is to suppress a picture defect such as a vertical streak, a ghost or the like on an active matrix display apparatus of a divided sample and hold type.A horizontal driving circuit (17) sequentially generates sampling pulses of which sampling pulses supplied to sampling switches (23) connected to an identical video line (25) do not overlap each other and sampling pulses supplied to adjacent sampling switches (23) overlap each other, and drives the switches, whereby a video signal is sequentially written to pixels (11). A clock generating circuit (18) generates a clock signal HCK serving as a basis for operation of the horizontal driving circuit (17), and a clock signal 2HCK having twice a cycle of the clock signal HCK and twice a pulse width of the clock signal HCK. The horizontal driving circuit (17) includes: a shift register (21) for performing shift operation in synchronism with the clock signal HCK and sequentially outputting shift pulses; and an extracting switch group (22) for extracting the clock signal 2HCK in response to the shift pulses, and sequentially generating the sampling pulses.
    • 本发明的一个目的是在分离的采样和保持型有源矩阵显示装置上抑制诸如垂直条纹,重影等的图像缺陷。 水平驱动电路(17)顺序地产生采样脉冲,其中提供给连接到相同视频线(25)的采样开关(23)的采样脉冲彼此不重叠,并且提供给相邻采样开关(23)的采样脉冲彼此重叠 并且驱动开关,由此将视频信号顺序地写入像素(11)。 时钟发生电路(18)产生用作水平驱动电路(17)的运算基准的时钟信号HCK和具有时钟信号HCK周期的两倍的时钟信号2 HCK和时钟的两倍的脉冲宽度 信号HCK。 水平驱动电路(17)包括:移位寄存器(21),用于与时钟信号HCK同步地执行移位运算,并顺序地输出移位脉冲; 以及提取开关组(22),用于响应于移位脉冲提取时钟信号2 HCK,并且顺序产生采样脉冲。
    • 50. 发明授权
    • Display device and method for driving the same
    • 显示装置及其驱动方法
    • US06744417B2
    • 2004-06-01
    • US09878289
    • 2001-06-12
    • Junichi YamashitaTomohiro Kashima
    • Junichi YamashitaTomohiro Kashima
    • G09G336
    • G09G3/3614G09G3/3648G09G3/3688G09G2310/0248G09G2310/0297G09G2320/0209
    • A liquid crystal display driven by a dot-line inversion driving method in combination with a 2-step dot sequential precharge driving method which, if black window or black lines are displayed, is free of horizontal trails on circumscribing portions thereof is provided. Before video signals having opposite polarities are applied to signal lines, first, a full-line precharge pulse is generated in the horizontal blanking periods, and precharge gray signals which have the same polarity as that of the previous pixel potential are written together based on the full-line precharge pulse. Then, precharge black signals having the same polarity as that of one of the video signals and precharge gray signals having the same polarity of that of the other video signal are written in two steps.
    • 提供了一种由点阵反转驱动方法驱动的液晶显示器,结合2步点顺序预充电驱动方法,如果显示黑色窗口或黑线,则在其外接部分上没有水平迹线。 在具有相反极性的视频信号被施加到信号线之前,首先,在水平消隐周期中产生全线预充电脉冲,并且基于该信号将具有与先前像素电位相同极性的预充电灰度信号一起写入 全线预充电脉冲。 然后,分两步写入具有与视频信号中的一个相同极性的黑色信号和与其他视频信号的极性相同极性的预充电灰色信号。