A display panel is provided that includes a plurality of pixel units, each having a first surface and a second surface opposite to the first surface, and comprising an electrophoretic gel part with a shape tapered in a direction from the first surface to the second surface, wherein a top surface of the electrophoretic gel part forms the first surface and electrophoretic particles are provided in the electrophoretic gel part; a light guiding part with a shape tapered in a direction from the second surface to the first surface, wherein the light guiding part and the electrophoretic glue part match in shape and abut with each other, and a bottom surface of the light guiding part forms at least a portion of the second surface; and a light-emitting device provided on the bottom surface of the light guiding part and operable to emit light toward the first surface.