A device for driving a light-emitting element, comprising: a voltage generator for providing a DC signal for driving a plurality of light-emitting units (101-1, 101-n); a plurality of sensing resistors (Rsen_1, Rsen_n), each of the plurality of sensing resistors associated to a respective light-emitting unit; and a plurality of dimming units (140-1, 140-n), each of the plurality of dimming units (140-1, 140-n) associated with a respective light-emitting unit and a respective sensing resistor and controlling current flowing through the respective sensing resistor (Rsen_1, Rsen_n) and the respective light-emitting unit (101-1, 101-n), wherein each of the plurality of dimming units (140-1, 140-n) includes an amplifier having a first input terminal whose input is a corresponding one of a plurality of constant-current control signals (Vset_1, Vset), a second input terminal connected to a corresponding one of the plurality of sensing resistors (Rsen_1, Rsen_n), and an output terminal; each of the plurality of dimming units further includes a switch connected between a corresponding one of the plurality of light-emitting units (101-1, 101-n) and one terminal of a corresponding one of the plurality of sensing resistors (Rsen_1, Rsen_n) and configured to switch in response to the output of the amplifier; and each of the plurality of dimming units further includes a voltage sensing unit configured for outputting a first sensing voltage (Vsen1_1, Vsen1_n) according to a sensed voltage at a respective first node at which a corresponding one of the plurality of light-emitting units (101-1, 101-n) and the respective switch 142 are connected and a second sensing voltage (Vsen2_1, Vsen2_n) according to a sensed voltage at a respective second node at which the respective switch and one terminal of a corresponding one of the plurality of sensing resistors (Rsen_1, Rsen_n) are connected, characterized in that the device further comprises a controller configured to adjust the level of the DC signal on the basis of the differences (Vsen1_1-Vsen2_1 to Vsen1_n-Vsen2_n) between the first sensing voltages and the second sensing voltages. a voltage generator for providing a DC signal for driving a plurality of light-emitting units (101-1, 101-n); a plurality of sensing resistors (Rsen_1, Rsen_n), each of the plurality of sensing resistors associated to a respective light-emitting unit; and a plurality of dimming units (140-1, 140-n), each of the plurality of dimming units (140-1, 140-n) associated with a respective light-emitting unit and a respective sensing resistor and controlling current flowing through the respective sensing resistor (Rsen_1, Rsen_n) and the respective light-emitting unit (101-1, 101-n), wherein each of the plurality of dimming units (140-1, 140-n) includes an amplifier having a first input terminal whose input is a corresponding one of a plurality of constant-current control signals (Vset_1, Vset), a second input terminal connected to a corresponding one of the plurality of sensing resistors (Rsen_1, Rsen_n), and an output terminal; each of the plurality of dimming units further includes a switch connected between a corresponding one of the plurality of light-emitting units (101-1, 101-n) and one terminal of a corresponding one of the plurality of sensing resistors (Rsen_1, Rsen_n) and configured to switch in response to the output of the amplifier; and each of the plurality of dimming units further includes a voltage sensing unit configured for outputting a first sensing voltage (Vsen1_1, Vsen1_n) according to a sensed voltage at a respective first node at which a corresponding one of the plurality of light-emitting units (101-1, 101-n) and the respective switch 142 are connected and a second sensing voltage (Vsen2_1, Vsen2_n) according to a sensed voltage at a respective second node at which the respective switch and one terminal of a corresponding one of the plurality of sensing resistors (Rsen_1, Rsen_n) are connected, characterized in that the device further comprises a controller configured to adjust the level of the DC signal on the basis of the differences (Vsen1_1-Vsen2_1 to Vsen1_n-Vsen2_n) between the first sensing voltages and the second sensing voltages.