Led driving apparatus having mitigated common impedance effect

A light-emitting diode (LED) driving apparatus comprising:

• a plurality of pixel circuits;
• and
• a driving circuit electrically connected to the plurality of pixel circuits,
• wherein each of the pixel circuits includes:
• a pixel line configured to connect between a pixel positive power source and a pixel negative power source;
• an LED connected in series to the pixel line;
• a first pixel MOSFET connected in series to the pixel line and turned on by a voltage output from the driving circuit;
• a second pixel MOSFET connected in series to the pixel line and connected to a source terminal of the first pixel MOSFET;
• and
• a capacitor connected between a gate terminal of the first pixel MOSFET and a gate terminal of the second pixel MOSFET, and
• wherein the driving circuit includes:
• a driving line configured to connect between a driving positive power source and a driving negative power source;
• a current source connected in series to the driving line to apply a reference current;
• a first driving MOSFET connected in series to the driving line and connected to the gate terminal of the first pixel MOSFET;
• a second driving MOSFET connected in series to the driving line and connected to the gate terminal of the second pixel MOSFET and a source terminal of the first driving MOSFET;
• and
• a switch element connected between the gate terminal of the first pixel MOSFET and a gate terminal of the first driving MOSFET.