Organic light-emitting display device

A display device comprising:

• a light emitting diode configured to emit light, the light emitting diode having an anode, a cathode, an internal resistor and a parasitic capacitor;
• a multiplexer circuit having an input connected to an anode of the light emitting diode;
• an amplifier having an inverting terminal, a non-inventing terminal, and an output terminal;
• a feedback capacitor having a first plate and a second plate, the second plate being coupled to an output terminal of the amplifier;
• a first output of the multiplexer circuit selectively connectable to the first plate;
• a second output of the multiplexer circuit selectively connectable to the inverting terminal;
• a sensing resistor positioned in a series path between the second output of the multiplexer circuit and the inverting terminal;
• a third output of the multiplexer circuit selectively connectable to the output terminal of the amplifier,
• a reset switch connected to the inverting terminal and the output terminal;
• a first switching transistor having a first gate electrode, a first source electrode, and a first drain electrode;
• a second switching transistor having a second gate electrode, a second source electrode, and a second drain electrode;
• a gate line connected to the first gate electrode of the first switching transistor and to the second gate electrode of the second switching transistor;
• a data line connected to a first drain electrode of the first switching transistor;
• a sensing line connected to a second drain electrode of the second switching transistor and the input of the multiplexer circuit;
• a driving transistor connected to the light emitting diode and the first source electrode of the first switching transistor;
• a storage capacitor connected between the first source electrode of the first switching transistor and the second source electrode of the second switching transistor;
• a first sensing path including the light emitting diode, the second switching transistor, and the feedback capacitor, wherein the second switching transistor is connected to the first output of the multiplexer circuit during a period while the first sensing path is formed;
• and
• a second sensing path including the light emitting diode, the second switching transistor, the sensing resistor and the feedback capacitor, wherein the second switching transistor is connected to the second output of the multiplexer circuit during a period while the second sensing path is formed.