Current driver, data driver, and display device

A current driver, comprising:

• a first input/output section through which a first current is input or output;
• a first bias voltage generating transistor connected between the first input/output section and a first reference node;
• a second input/output section through which a second current is input or output;
• a second bias voltage generating transistor connected between the second input/output section and the first reference node;
• K driving transistors connected between an output node through which an output current is input or output and the first reference node, where K is a natural number;
• a first gate line to which a gate of the first bias voltage generating transistor, gates of the K driving transistors, and a gate of the second bias voltage generating transistor are connected in this order;
• a first voltage supply node which receives a first voltage;
• a first differential amplifier circuit which outputs a third voltage having a voltage value determined according to a difference between a voltage value of a second voltage at a first interconnection node of the first input/output section and the first bias voltage generating transistor and the first voltage value of the first voltage received by the first voltage supply node;
• a second voltage supply node which receives a fourth voltage;
• and
• a second differential amplifier circuit which outputs a sixth voltage having a voltage value determined according to a difference between a voltage value of a fifth voltage at a second interconnection node of the second input/output section and the second bias voltage generating transistor and the fourth voltage value of the fourth voltage received by the second voltage supply node,
• wherein the first bias voltage generating transistor receives at its gate the third voltage output by the first differential amplifier circuit, and
• the second bias voltage generating transistor receives at its gate the sixth voltage output by the second differential amplifier circuit.