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Methods for driving bistable electro-optic displays

  • US 7,492,339 B2
  • Filed: 03/15/2005
  • Issued: 02/17/2009
  • Est. Priority Date: 03/26/2004
  • Status: Active Grant
First Claim
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1. A method of driving a bistable electro-optic display having at least one pixel which comprises applying to the pixel a waveform V(t) such that:

  • J =

    0 T


    V

    ( t )


    M

    ( T - t )




    t
    is less than about 1 volt sec,where;

    T is the length of the waveform, the integral is over the duration of the waveform, V(t) is the waveform voltage as a function of time t, and M(t) is a memory function that characterizes the reduction in efficacy of the remnant voltage to induce dwell-time-dependence arising from a short pulse at time zero, the waveform comprising a first pulse having a voltage, polarity and duration, and a second pulse having substantially the same voltage magnitude, a polarity opposite to that of the first pulse and a duration substantially less than that of the first pulse.

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