Patent ID: 7397597

Claim:
An electrophoretic display panel ( 1 ) for displaying a picture comprising: a pixel ( 2 ) having an electrophoretic medium ( 5 ) comprising first and second charged particles ( 6 , 7 ), the first charged particles ( 6 ) having a first optical property, the second charged particles ( 7 ) having a second optical property different from the first optical property, and an optical state depending on positions of the particles ( 6 , 7 ), particle movement means ( 10 , 11 , 100 ) arranged to enable a picture movement of the first and the second particles ( 6 , 7 ) to their respective position for displaying the picture, and particles movement decoupling means arranged to provide unequal abilities of the first and the second particles ( 6 , 7 ) to move for substantially decoupling the picture movement of the first particles ( 6 ) from the picture movement of the second particles ( 7 ), characterized in that the particles movement decoupling means ( 24 , 25 ) are arranged to provide unequal interactions of the first and the second particles ( 6 , 7 ) with their respective surroundings for providing the unequal abilities of the first and the second particles ( 6 , 7 ) to move.