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    • 10. 发明申请
    • Display Apparatus with a Display Device and Method of Driving the Display Device
    • 具有显示装置的显示装置和驱动显示装置的方法
    • US20110292026A1
    • 2011-12-01
    • US13205303
    • 2011-08-08
    • Mark Thomas Johnson
    • Mark Thomas Johnson
    • G09G5/00
    • G09G3/3446G09G3/2018G09G2300/08G09G2320/0204G09G2320/041
    • A display apparatus (1) comprises a matrix display device (DD) with pixels (10) wherein particles (14) move in a fluid (13) between electrodes (6, 6′, 7). An optical state of the pixels (10) is defined by a value of a drive voltage (VDi) and a duration (Di) of a drive period (TDi) during which the drive voltage (VDi) is present across the pixel (10). A DC-balancing circuit (3) controls the amplitudes of the drive voltages (VDi) and/or durations (Di) of drive periods (TDi) to obtain a substantially zero time-average value (N) across each pixel (10) or across each sub-group of pixels. This control of the amplitude of the drive voltages (VDi) and/or the duration (Di) of the drive periods (TDi) allows minimizing the image retention, without requiring reset pulses causing all pixels (10) to become temporarily white or black. In a preferred embodiment in accordance with the invention, a display device (DD) is used in which a drive voltage (VDi) is supplied to the pixel (10) with a level such that the grey level (or the amount of colorization) does not change anymore after an initial period of time. Now, if applicable, the DC-balancing can be performed by making the duration (Di) of the drive periods (TDi) longer than the initial period of time.
    • 显示装置(1)包括具有像素(10)的矩阵显示装置(DD),其中颗粒(14)在电极(6,6',7)之间的流体(13)中移动。 像素(10)的光学状态由驱动电压(VDi)的值和跨越像素(10)存在驱动电压(VDi)的驱动周期(TDi)的持续时间(Di)定义, 。 直流平衡电路(3)控制驱动周期(TDi)的驱动电压(VDi)和/或持续时间(Di)的振幅,以获得跨越每个像素(10)的基本上为零的时间平均值(N)或 跨越每个子像素组。 对驱动周期(TDi)的驱动电压(VDi)和/或持续时间(Di)的幅度的这种控制允许使图像保持最小化,而不需要使所有像素(10)变得暂时白色或黑色的复位脉冲。 在根据本发明的优选实施例中,使用显示装置(DD),其中以像素(10)的方式将驱动电压(VDi)提供给灰度级(或着色量) 在最初的时间之后不再改变。 现在,如果适用,可以通过使驱动周期(TDi)的持续时间(Di)长于初始时间段来执行直流平衡。