Patent ID: 8576259

Claim:
A method for driving from a first image to a second image in an electrophoretic display wherein there are non-updated areas and updated areas between the first and second images, which method comprises the steps of: a) applying a first voltage (V 1 ) to pixel electrodes associated with non-updated areas which are % A NU of the total image area; and b) applying a second voltage (V 2 ) to pixel electrodes associated with updated areas which are % A U of the total image area; whereby a floating common electrode not connected to a driving circuit has a third voltage (V 3 ) which is V 1 ×% A NU +V 2 ×% A U ; and a driving voltage created between the first voltage (V 1 ) and the third voltage (V 3 ) causes no image update in the non-updated areas and a driving voltage created between the second voltage (V 2 ) and the third voltage (V 3 ) is sufficient to cause the updated areas updated.