Bistable electro-optic display, and method for addressing same

A method for addressing an electro-optic display, this electro-optic display comprising:

• a bistable electro-optic material having on one side thereof a viewable surface visible to an observer viewing the display, and on the opposed side thereof a writing surface;
• a deformable member contacting the writing surface of the electro-optic material, the deformable member having a plurality of electrodes formed on its surface contacting the writing surface of the electro-optic material;
• and a movable member disposed on the opposed side of the deformable member from the electro-optic material and movable relative to the electro-optic material, the movable member urging the deformable member into contact with the electro-optic material such that movement of the movable member relative to the electro-optic material will cause the area of contact between the deformable member and the electro-optic material to move across the writing surface of the electro-optic material, the method comprising:
• placing the movable member in a first position relative to the electro-optic material and placing a first set of potentials on the electrodes, thereby writing a first column of pixels of the display, each of this column of pixels being defined by the portion of one electrode which contacts the writing surface of the electro-optic material when the movable member is in its first position;
• and
• moving the movable member to a second position relative to the electro-optic material, this second position being spaced from the first position, and placing a second set of potentials are placed on the electrodes, at least one of the second set of potentials differing from the first set of potentials, thereby writing a second column of pixels of the display, each of this column of pixels being defined by the portion of one electrode which contacts the writing surface of the electro-optic material when the movable member is in its second position.