Pixel circuit, display device including the same and the electronic device including the same

A pixel circuit comprising:

• a driving transistor including a control electrode connected to a first node, a first electrode which receives a first power voltage and a second electrode connected to a second node, wherein the driving transistor generates a driving current based on a voltage of the first node;
• a write transistor which applies a data voltage to the driving transistor in response to a write gate signal;
• an emission transistor which connects the second node and a fourth node to each other in response to an emission signal;
• a light emitting element initialization transistor which applies an initialization voltage to the fourth node in response to a bias signal;
• and
• a light emitting element including a first electrode connected to the fourth node and a second electrode which receives a second power voltage,
• wherein the emission signal toggles between a first emission voltage and a second emission voltage lower than the first emission voltage, and
• wherein an absolute value of the second emission voltage is lower than a value obtained by subtracting an absolute value of a threshold voltage of the emission transistor from a value obtained by adding a voltage of the second electrode of the driving transistor and the second power voltage.

An electronic device comprising:

• a display panel including a pixel circuit;
• a gate driver which outputs gate signals to the pixel circuit;
• an emission driver which outputs an emission signal to the pixel circuit;
• a voltage generator which applies a power voltage to the display panel;
• a driving controller which controls the gate driver, the emission driver and the voltage generator based on an input control signal;
• and
• a processor which outputs the input control signal,
• wherein the pixel circuit includes:
• a driving transistor including a control electrode connected to a first node, a first electrode which receives a first power voltage and a second electrode connected to a second node, wherein the driving transistor generates a driving current based on a voltage of the first node;
• a write transistor which applies a data voltage to the driving transistor in response to a write gate signal;
• a control transistor including a control electrode which receives a control signal, a first electrode connected to the second node and a second electrode connected to a fourth node;
• an emission transistor which connects the fourth node and a fifth node to each other in response to the emission signal;
• a light emitting element initialization transistor which applies an initialization voltage to the fifth node in response to a bias signal;
• and
• a light emitting element including a first electrode connected to the fifth node and a second electrode which receives a second power voltage,
• wherein the voltage generator outputs the control signal, and
• wherein the control signal is a direct current voltage.