Public voltage compensation method and display panel

A public voltage compensation method, applied in a display module comprising a first multi-channel operational amplifier and a display panel, wherein:

• the first multi-channel operational amplifier comprises a first feedback input terminal, a second feedback input terminal, a first compensation output terminal, a second compensation output terminal, a third compensation output terminal, and a fourth compensation output terminal;
• the display panel comprises a first side edge, a public electrode wire to be compensated, a first public voltage feedback output terminal, a second public voltage feedback output terminal, a first compensation input terminal, n second compensation input terminals, a third compensation input terminal, and n fourth compensation input terminals, the first compensation input terminal and the n second compensation input terminals are distributed along a direction from a first end of the first side edge to a second end of the first side edge, and the first compensation input terminal is provided at a position corresponding to the first end of the first side edge, the third compensation input terminal and the n fourth compensation input terminals are distributed along a direction from the second end of the first side edge to the first end of the first side edge, and the third compensation input terminal is provided at a position corresponding to the second end of the first side edge;
• and
• the public voltage compensation method comprises:
• installing the first multi-channel operational amplifier;
• connecting the first public voltage feedback output terminal of the display panel with the first feedback input terminal of the first multi-channel operational amplifier, connecting the second public voltage feedback output terminal of the display panel with the second feedback input terminal of the first multi-channel operational amplifier, connecting the first compensation input terminal of the display panel with the first compensation output terminal of the first multi-channel operational amplifier, connecting the third compensation input terminal of the display panel with the third compensation output terminal of the first multi-channel operational amplifier, connecting one of the n second compensation input terminals with the second compensation output terminal of the first multi-channel operational amplifier, and connecting one of the n fourth compensation input terminals with the fourth compensation output terminal of the first multi-channel operational amplifier;
• interconnecting each of the n second compensation input terminals and interconnecting each of the n fourth compensation input terminals, to allow the first multi-channel operational amplifier to compensate for the public voltage of the public electrode wire to be compensated;
• and
• detecting a compensation effect of the public voltage of the public electrode wire to be compensated, and determining whether to end up compensating for the public voltage of the public electrode wire to be compensated according to the compensation effect of the public voltage, n being greater than 1.