Flexible array substrate, flexible display device and method of assembling the same

A flexible array substrate, having a main display area, the flexible array substrate comprising:

• a flexible substrate comprising at least one bent portion extending from at least one side of the main display area, and
• a plurality of signal connecting portions disposed at a side of the at least one bent portion away from the main display area,
• wherein
• a plurality of signal lines are disposed on a first surface of the flexible substrate in the main display area and the plurality of signal connecting portions are configured to electrically connect the plurality of signal lines to at least one driving circuit, and the at least one bent portion is configured to bend toward a second surface of the flexible substrate opposite to the first surface to move the plurality of signal connecting portions to a back side of the main display area away from the first surface.