According to an embodiment of present disclosure, an area of the orthographic projection of the second driving circuit on the substrate is smaller than an area of an orthographic projection of the first driving circuit on the substrate.

According to an embodiment of present disclosure, a number of thin film transistors and capacitors included in the second driving circuit is smaller than a number of thin film transistors and capacitors included in the first driving circuit.

According to an embodiment of present disclosure, a color of light emitted by the second light-emitting unit is the same as a color of light emitted by the first light-emitting unit adjacent to the second sub-pixel region.

According to an embodiment of present disclosure, a second transparent cathode for driving the second light-emitting unit to emit light is disposed on the substrate and located in the second sub-pixel region, and a first transparent cathode for driving the first light-emitting unit to emit light is disposed on the substrate and located in the first sub-pixel region, the first transparent cathode and the second transparent cathode are formed in an integrated structure, and an orthographic projection of the second transparent cathode on the substrate covers the orthographic projection of the through hole on the substrate.