Abstract: Disclosed are drive chip, drive circuit and drive method capable of eliminating LED ghost. The drive chip comprises a processing unit, a blanking unit and a constant current drive unit. By blanking unit, parasitic capacitances of each row of scanning lines of an LED array is discharged during a blanking period, eliminating an upper ghost without needing to pull down additional circuits such as a resistor, no caterpillar effect or the reverse bias of LED lamp beads; charging parasitic capacitance of each column of scanning lines of the LED array, eliminating lower ghost. By constant current drive unit, constant current control is performed on LED lamp beads. Performing blanking and constant current control individually in two time periods, when displaying LED lamp beads, parasitic capacitance and both upper and lower ghosts are eliminated.

Abstract: Disclosed are drive chip, drive circuit and drive method capable of eliminating LED ghost. The drive chip comprises a processing unit, a blanking unit and a constant current drive unit. By blanking unit, parasitic capacitances of each row of scanning lines of an LED array is discharged during a blanking period, eliminating an upper ghost without needing to pull down additional circuits such as a resistor, no caterpillar effect or the reverse bias of LED lamp beads; charging parasitic capacitance of each column of scanning lines of the LED array, eliminating lower ghost. By constant current drive unit, constant current control is performed on LED lamp beads. Performing blanking and constant current control individually in two time periods, when displaying LED lamp beads, parasitic capacitance and both upper and lower ghosts are eliminated.