Data driving circuit and method for operating the same

A method for operating a data driving circuit including a first analog front-end (AFE) circuit, the method comprising:

• sensing a first characteristic voltage from a first channel line connected to a first pixel through a first sensing line while a first channel switch is in a turn-on state;
• turning on a first reset switch in response to a first reset signal to provide a first compensation voltage to the first sensing line, the first reset switch being turned on before a second channel switch is turned on, and the second channel switch being turned on after the first channel switch is turned off;
• and
• sensing a second characteristic voltage from a second channel line connected to a second pixel through the first sensing line while the second channel switch is in a turn-on state.

A data driving circuit comprising:

• a first analog front-end (AFE) circuit configured to sense a characteristic voltage of a plurality of pixels through a sensing line and output an output signal;
• and
• an analog-to-digital converter configured to receive the output signal, perform analog-digital conversion on the output signal, and output a digital compensation signal based on the analog-digital conversion performed on the output signal,
• wherein the first AFE circuit includes,
• a sampling capacitor configured to store at least a portion of a sensed characteristic voltage,
• a sampling switch connected between the sensing line and the sampling capacitor, and configured to selectively provide the sensed characteristic voltage to the sampling capacitor,
• a first reset switch having a first end connected to the sensing line and a second end configured to receive a first compensation voltage,
• a second reset switch having a first end connected to a node connecting the sensing line with the sampling capacitor and a second end configured to receive a second compensation voltage, and
• an output switch configured to selectively connect the sampling capacitor to the analog-to-digital converter and selectively provide the output signal to the analog-to-digital converter.