Display panel, and methods for manufacturing and controlling the same

A display panel comprising:

• a lower substrate;
• a plurality of third electrodes disposed on the lower substrate;
• a film layer disposed on the lower substrate;
• a plurality of second grooves formed in a surface of the film layer facing away from the lower substrate, wherein the plurality of second grooves are in one-to-one correspondence with the plurality of third electrodes;
• a perforated reflective layer fixed within each of the plurality of second grooves, wherein the perforated reflective layer is located near a bottom of a corresponding second groove, and there is a space between the perforated reflective layer and the bottom of the corresponding second groove;
• electronic ink filled in each of the plurality of second grooves, wherein the electronic ink comprises black charged particles, a refractive index of a liquid in the electronic ink is larger than a refractive index of the film layer, and a diameter of each of the charged particles is smaller than a diameter of each of via holes in the perforated reflective layer;
• a second encapsulation substrate disposed on the surface of the film layer provided with the plurality of second grooves;
• and
• a plurality of transparent fourth electrodes disposed on the second encapsulation substrate, wherein, the plurality of transparent fourth electrodes are in one-to-one correspondence with the plurality of second grooves.