Electro-optical apparatus and driving method thereof

An electro-optical apparatus, comprising:

• a first substrate;
• a second substrate disposed opposite to the first substrate;
• a display medium layer disposed between the first substrate and the second substrate, wherein the display medium layer comprises electrophoretic fluid and a plurality of charged particles mixed into the electrophoretic fluid;
• a first electrode disposed between the first substrate and the display medium layer;
• a second electrode disposed between the first substrate and the display medium layer, wherein the second electrode is separated from the first electrode;
• a third electrode disposed between the display medium layer and the second substrate, wherein the third electrode completely covers the second substrate;
• a forth electrode disposed between the first substrate and the display medium layer, wherein the forth electrode is separated from the first electrode and the second electrode, the first electrode comprises a plurality of first branches, and the second electrode comprises a plurality of second branches, and the forth electrode comprises a plurality of forth branches, the first branches, the second branches and the forth are divided into a plurality of groups which are alternately arranged, and each of the groups comprising one of the first branches, one of the forth branches, one of the second branches and another one of the forth branches in sequence.