Patent ID: 8035611
Filing Date: 2011-10-11
Classification: G09G

Abstract:
1. An electrophoretic display device comprising: a pixel substrate including a plurality of signal lines, a plurality of scanning lines, said signal lines and scanning lines intersecting each other, and a plurality of pixel electrodes as electrophoretic elements disposed at intersections of said signal lines and said scanning lines; a facing substrate including a transparent counter electrode to face said plurality of pixel electrodes and making up a display surface; an electrophoretic film sandwiched between said pixel substrate and said facing substrate and including first colored charged particles with a first color and a first polarity and second colored charged particles with a second color and a second polarity, said second color and said second polarity being different from said first color and said first polarity; and a voltage selection unit for selecting a time-series voltage in response to input display data for each pixel electrode and applying the selected time-series voltage between said each pixel electrode and said transparent counter electrode, during a period of time corresponding to a specified number of frames comprising at least first frames or second frames which are selectively provided based on said input display data for each pixel electrode, wherein, during a period of time corresponding to each first frame, said voltage selection unit applies a first voltage between an appropriate one of said plurality of the pixel electrodes and said transparent counter electrode to move said first colored charged particles toward a side of said display surface and to move said second colored charged particles away from said side of said display surface, wherein, during a period of time corresponding to each second frame, said voltage selection unit applies a second voltage between an appropriate one of said plurality of the pixel electrodes and said transparent counter electrode to move said second colored charged particles toward a side of said display surface and to move said first colored charged particles away from said side of said display surface, and wherein said voltage selection unit provides said first and/or second frames, respectively, during a period of a first transition state changing from a current picture whose display state is brought by said first colored charged particles to a next picture whose display state is brought by said second colored charged particles, and during a period of a second transition state changing from a current picture whose display state is brought by said second colored charged particles to a next picture whose display state is brought by said first colored charged particles, for each appropriate pixel electrode, on condition of satisfying a following equation: where Twb(−) denotes a number of said first frames which are provided during the period of the first transition state, and Twb(+) denotes a number of said second frames which are provided during the period of the first transition state, Twb(−) being not equal to Twb(+); and Tbw(−) denotes a number of said first frames which are provided during the period of the second transition state, and Tbw(+) denotes a number of said second frames which are provided during the period of the second transition state, Tbw(−) being not equal to Tbw(+).