Pixel circuit

A pixel circuit configured to control a light-emitting element, the pixel circuit comprising:

• a constant current control circuit including a first thin-film transistor, the constant current control circuit being configured to control current that flows in the light-emitting element;
• and
• a pulse width modulation circuit configured to output a control signal for the first thin-film transistor based on a gray-level data voltage and a ramp signal input to the pulse width modulation circuit,
• wherein the first thin-film transistor is configured to control the current that flows in the light-emitting element, and
• wherein the pulse width modulation circuit includes:
• a pulse width modulation driving thin-film transistor;
• and
• a second thin-film transistor disposed between the pulse width modulation driving thin-film transistor and an output node of the control signal, a gate of the second thin-film transistor being configured to be supplied with a constant voltage.