Driving method for electrophoretic display

A driving method for an electrophoretic display including a plurality of first electrodes, a second electrode, and electrophoretic particles positioned in a plurality of pixel areas between the first electrodes and the second electrode, the driving method comprising:

• applying an initial driving voltage to the electrophoretic particles in a portion of the pixel areas for a predetermined time;
• consecutively applying a first image-displaying voltage and a first constant gray-display voltage to the electrophoretic particles to a portion of the pixel areas for a first predetermined time period and a second predetermined time period, respectively, after the applying of the initial driving voltage, wherein the first image-displaying voltage and the first constant gray-displaying voltage are of substantially the same magnitude and have a polarity that is opposite to that of the initial driving voltage;
• applying a second image-displaying voltage to the electrophoretic particles positioned in a portion of the plurality of pixel areas for a third predetermined time period;
• applying a second constant gray-displaying voltage to the electrophoretic particles positioned in a portion of the plurality of pixel areas for a fourth predetermined time period;
• and
• generating a desired gray scale level by varying lengths of the first and second predetermined time periods and a separation period between the first and second predetermined time periods,
• wherein the plurality of pixel areas display any one gray scale image of a maximum gray scale image to a minimum gray scale image by applying the second image-displaying voltage, the respective pixel areas display the maximum gray scale image by applying the second constant gray-displaying voltage, and the respective pixel areas display the minimum gray scale image by applying the compensation voltage,
• wherein the second image-displaying voltage is applied for one of a tenth duration, an eleventh duration, and a twelfth duration, the second constant gray-displaying voltage is applied for one of a thirteenth duration, a fourteenth duration, and a fifteenth duration, and the compensation voltage is applied for an eighteenth duration,
• wherein the second constant gray-displaying voltage for displaying the maximum gray scale image is applied for the thirteenth duration, and the second constant gray-displaying voltage is applied after the seventeenth duration has passed, and wherein the second constant gray-displaying voltage for displaying the first color image is applied for the fourteenth duration, and the second constant gray-displaying voltage is applied after the sixteenth duration has passed,
• wherein the pixel area displaying the minimum gray scale image of the plurality of the pixel areas displays a second middle gray scale image brighter than the minimum gray scale image after the sixteenth duration has passed, and the pixel area displaying the second middle gray scale image of the plurality of the pixel areas displays a first middle gray scale image brighter than the second middle gray scale image after the seventeenth duration has passed.