Display device and driver thereof

A driver for driving a light emitting unit array of a display device, the driver including:

• a plurality of driving units, each of the plurality of driving units includes:
• a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch;
• a charge path circuit configured to be connected in parallel with the driving circuit, and to be turned on during the turn-on period of the channel switch to form a charge path, and provide a charging current to the corresponding column of the light emitting units through the charge path;
• and
• a discharge path circuit configured to be connected in parallel with the driving circuit, and to be turned-on after the channel switch is turned off, to form a discharge path, so that residual charges of the corresponding column of the light emitting units are discharged through the discharge path,
• wherein each of the driving units further includes a mixed-signal controller coupled to the charge path circuit and the discharge path circuit, and the mixed-signal controller configured to:
• control the turn-on of the charge path circuit and the discharge path circuit according to a rising edge and a falling edge of a same pulse width modulation signal respectively;
• wherein
• output a first control signal to the charge path circuit when the rising edge of the pulse width modulation signal is detected, to turn-on a first switching element of the charge path circuit so that the charge path circuit is turned-on;
• and
• output a second control signal to the discharge path circuit, when the falling edge of the same pulse width modulation signal is detected, to turn-on a second switching element of the discharge path circuit so that the discharge path circuit is turned-on;
• and
• wherein discharging of the residual charges of the corresponding column of the light emitting units based on the pulse width modulation signal is performed after the charging current is provided to the light emitting units of the corresponding column based on the same pulse width modulation signal.