The embodiments of the present invention relates to a 3D display device and a method for driving the 3D display device, the 3D display device comprising an Active Retarder (AR) (200) and a display panel (100), the display panel (100) comprising N first pixel regions and N second pixel regions, N being an integer larger than or equal to 1, the AR (200) comprising 2N signal electrode sets, each signal electrode set comprises at least one signal electrode, and each signal electrode set corresponding to at least one pixel region of the display panel (100). The embodiments of the present invention also relate to an image processing method and a 3D display device, which can avoid prominent variation in lightness received by the left and right eye when switching from a current frame to a next frame, and thus flicking can be eliminated.