Display circuit and control method therefor

A display circuit, comprising:

• a lamp bead array;
• a column-oriented drive switch array, wherein one end of the column-oriented drive switch array is connected to a column direction of the lamp bead array, the other end of the column-oriented drive switch array is grounded, and the column-oriented drive switch array is configured to control opening and closing of lamp beads, in a column direction, in the lamp bead array;
• a row-oriented drive switch array, wherein the row-oriented drive switch array is connected to first ends of lamp beads, in a row direction, in the lamp bead array, and the row-oriented drive switch array is configured to control opening and closing of the lamp beads, in the row direction, in the lamp bead array;
• and
• a common-anode discharge control circuit, wherein one end of the common-anode discharge control circuit is connected to second ends of the lamp beads, in the row direction, in the lamp bead array, the other end of the common-anode discharge control circuit is grounded, the common-anode discharge control circuit comprises a constant current source, a diode and a resistor, a first end of the diode is connected to the second ends of the lamp beads, in the row direction, in the lamp bead array, a second end of the diode is connected to a first end of the constant current source, the second end of the diode is connected to a first end of the resistor, a second end of the resistor and a second end of the constant current source are connected to a power supply, and a grounded end of the constant current source is grounded;
• wherein, when a first row of lamp beads in the lamp bead array is closed and when a second row of lamp beads in the lamp bead array is in a lighted state, the common-anode discharge control circuit is controlled to be turned on in order that a circuit where the first row of lamp beads is located discharges electricity,
• wherein the first row of lamp beads and the second row of lamp beads are any rows of lamp beads in the lamp bead array, and the first row of lamp beads and the second row of lamp beads are displayed in sequence, and
• wherein, when the second row of lamp beads is changed from the lighted state to the closed state, the common-anode discharge control circuit is controlled to be turned off.