Display panel, fabricating method thereof, display device and charging method thereof

A display panel, comprising:

• an array substrate;
• an opposite substrate opposite to the array substrate;
• and
• a charging coil between the array substrate and the opposite substrate;
• wherein the charging coil is configured to generate electrical energy to the display panel through electromagnetic induction;
• the display panel further comprises:
• a display area and a peripheral circuit area surrounding the display area, an orthographic projection of the display area on the array substrate does not overlap with an orthographic projection of the peripheral circuit area on the array substrate;
• the display area comprises a plurality of pixel elements, at least part of the charging coil is in the display area;
• an orthographic projection of the charging coil on the opposite substrate does not overlap with orthographic projections of the plurality of the pixel elements on the opposite substrate;
• the charging coil comprises a plurality of sub-charging coil segments connected in sequence, and at least part of the plurality of sub-charging coil segments is located in a gap between adjacent pixel elements;
• wherein the opposite substrate comprises a first base substrate, and the charging coil is located on a side of the first base substrate facing the array substrate;
• the display panel further comprises:
• a black matrix on the side of the first base substrate facing the array substrate, wherein an orthographic projection of the black matrix on the first base substrate covers an orthographic projection of the charging coil on the first base substrate;
• wherein the charging coil is located between the first base substrate and a layer where the black matrix is located;
• the display panel further comprises:
• two charging terminals on the array substrate, wherein one of the two charging terminals corresponds to an inner end of the charging coil, and the other charging terminal corresponds to an outer end of the charging coil;
• and the outer end and the inner end of the charging coil are electrically connected respectively with their corresponding charging terminals;
• the display panel further comprises:
• a first coil lead corresponding to the inner end, a second coil lead corresponding to the outer end, and an insulation layer between a layer where the first coil lead is located and a layer where the second coil lead is located;
• wherein the inner end and the outer end are electrically connected with the first coil lead and the second coil lead respectively through via-holes running through the insulation layer, the first coil lead is electrically connected with the charging terminal corresponding to the inner end, and the second coil lead is electrically connected with the charging terminal corresponding to the outer end;
• wherein the insulation layer is the black matrix.