Led display unit group and display panel

A display panel, comprising a light-emitting diode (LED) display unit group, wherein the LED display unit group comprises:

• a circuit board comprising N metal wiring layers stacked in sequence and at least one insulating plate, wherein each of the at least one insulating plate is disposed between adjacent metal wiring layers among the N metal wiring layers, the N metal wiring layers are electrically connected through conductive vias on the at least one insulating plate, and N≥2;
• and
• pixel units arranged in an array of m rows and n columns and disposed on the circuit board, wherein each of the pixel units comprises at least two LED light-emitting chips with different emitted colors, each of the at least two LED light-emitting chips is fixed on a first metal wiring layer among the N metal wiring layers, m≥2, and n≥2;
• wherein the first metal wiring layer comprises m common A-electrode pads, a plurality of A-electrode pads, and a plurality of B-electrode pads, wherein the plurality of A-electrode pads are disposed in one-to-one correspondence with A electrodes of LED light-emitting chips, the plurality of B-electrode pads are disposed in one-to-one correspondence with B electrodes of the LED light-emitting chips, and all A-electrode pads corresponding to each row of pixel units in the pixel units are integrally formed with and electrically connected to one of the m common A-electrode pads corresponding to the each row of pixel units;
• and
• each of the m common A-electrode pads comprises at least one bend part, and a bending direction of the at least one bend part of one of the m common A-electrode pads corresponding to a first row of pixel units in the pixel units is opposite to a bending direction of the at least one bend part of one of the m common A-electrode pads corresponding to an m-th row of pixel units in the pixel units.