Array substrate, electronic paper display device and driving method thereof

An array substrate, having a plurality of pixel regions arranged in an array and comprising:

• a base substrate;
• and
• a plurality of pixel electrodes and a barrier wall electrode structure, disposed on a side of the base substrate, wherein the plurality of pixel electrodes are respectively located in the plurality of pixel regions, and the barrier wall electrode structure is located between adjacent pixel regions, wherein
• the plurality of pixel regions comprises a first pixel region and a second pixel region which are arranged in a first direction parallel to a main surface of the base substrate and are adjacent to each other, and the plurality of pixel electrodes comprise a first pixel electrode and a second pixel electrode respectively located in the first pixel region and the second pixel region;
• and
• the barrier wall electrode structure comprises a first barrier wall electrode, a second barrier wall electrode and a third barrier wall electrode;
• at least a portion of the first barrier wall electrode, at least a portion of the second barrier wall electrode and at least a portion of the third barrier wall electrode are sequentially arranged between the first pixel region and the second pixel region in the first direction;
• the first barrier wall electrode and the second barrier wall electrode are configured to form a first electric field, the second barrier wall electrode and the third barrier wall electrode are configured to form a second electric field, the first electric field and the second electric field are in opposite directions and are configured to together constitute an electronic barrier wall;
• wherein the second barrier wall electrode is an electrode shared by the first electric field and the second electric field.