Display panel and driving method thereof and display device

A display device comprising a display panel, wherein the display panel comprises:

• a plurality of pixel units, each pixel unit comprising,
• a transparent electrode;
• a pixel electrode opposite to the transparent electrode;
• an auxiliary electrode at a side of the transparent electrode facing the pixel electrode, wherein a through channel is provided in the auxiliary electrode;
• an electrostrictive dielectric layer between the auxiliary electrode and the transparent electrode, wherein an accommodation space is provided in the electrostrictive dielectric layer;
• and
• charged particles between the transparent electrode and the pixel electrode;
• wherein the through channel is configured to allow the charged particles to pass through the auxiliary electrode through the through channel, and
• the electrostrictive dielectric layer is configured to selectively confine the charged particles in the accommodation space according to an electric field applied thereto,
• wherein the electrostrictive dielectric layer is further configured to enable the accommodation space to be changed from a first size to a second size according to the electric field applied thereto, wherein the electrostrictive dielectric layer is capable of confining the charged particles in the accommodation space when the accommodation space has the first size;
• and the electrostrictive dielectric layer allows the charged particles to leave the accommodation space when the accommodation space has the second size.