Electro-phoretic display capable of improving gray level resolution and method for driving the same

An electro-phoretic display, comprising:

• a display panel, having a plurality of pixel units and a plurality of driving lines;
• and
• a driver, coupled to the display panel, the driver respectively setting a plurality of particle tightening time periods and a plurality of gray level displaying time periods for the pixel units, wherein each of the gray level displaying time periods is arranged after each corresponding particle tightening time period, the driver respectively provides a plurality of particle tightening voltages to the pixel units for increasing a tightening level of particles in the pixel units during the particle tightening time periods, and the driver respectively provides a plurality of display driving voltages to the pixel units for displaying during the gray level displaying time periods, wherein the driver respectively determines the particle tightening time periods and/or the gray level displaying time periods according to a plurality of display gray level data corresponding to the pixel units,
• wherein a time length of each of the particle tightening time periods is varied by the driver whenever a corresponding one of the plurality of display gray level data corresponding to a corresponding one of the pixel units before displaying is changed,
• wherein each of the particle tightening voltages of a driving signal and the corresponding display driving voltage of the driving signal are reversed in polarity, and the particle tightening voltage of the driving signal and the corresponding display driving voltage of the driving signal are both sent down the same driving line,
• wherein the time length of each of the particle tightening time periods is equal to an integer multiple of a frame period of the electro-phoretic display.