A display device comprising an over current control device connected in series between a supply line (EVDD) of the display device and an OLED display panel of the display device for detecting an over current provided to the OLED display panel, wherein the display panel comprises a plurality of pixels, each pixel comprises a sensing transistor (SENT) and an organic light emitting diode (OLED), wherein the sensing transistor (SENT) comprises an input terminal connected to an anode of the organic light emitting diode (OLED) and an output terminal, the over current control device comprising: an over-current identification unit adapted to compare a driving voltage (V_evdd) on the supply line (EVDD) for driving the OLED display panel with a reference voltage (Vref) on a voltage line (Vref) for identifying the over-current; an interruption unit connected between the supply line (EVDD) supplying the driving voltage (V_evdd) and the OLED display panel for interrupting the power supply if the over-current identification unit recognizes an over-current flowing through the supply line (EVDD); wherein the over-current identification unit comprises: a comparator having a first and second input and an output, the first input is connected to the supply line (EVDD) and the second input is connected to the voltage line (Vref) and is also connected to an input terminal (Nref) of a switching element of the display panel, wherein the output of the comparator is connected with an input of the interruption unit, wherein an output terminal (Nrvl) of the switching element is connected to output terminals of the sensing transistors (SENT) of the display panel. an over-current identification unit adapted to compare a driving voltage (V_evdd) on the supply line (EVDD) for driving the OLED display panel with a reference voltage (Vref) on a voltage line (Vref) for identifying the over-current; an interruption unit connected between the supply line (EVDD) supplying the driving voltage (V_evdd) and the OLED display panel for interrupting the power supply if the over-current identification unit recognizes an over-current flowing through the supply line (EVDD); wherein the over-current identification unit comprises: a comparator having a first and second input and an output, the first input is connected to the supply line (EVDD) and the second input is connected to the voltage line (Vref) and is also connected to an input terminal (Nref) of a switching element of the display panel, wherein the output of the comparator is connected with an input of the interruption unit, wherein an output terminal (Nrvl) of the switching element is connected to output terminals of the sensing transistors (SENT) of the display panel. a comparator having a first and second input and an output, the first input is connected to the supply line (EVDD) and the second input is connected to the voltage line (Vref) and is also connected to an input terminal (Nref) of a switching element of the display panel, wherein the output of the comparator is connected with an input of the interruption unit, wherein an output terminal (Nrvl) of the switching element is connected to output terminals of the sensing transistors (SENT) of the display panel.