Sensing circuit and display device including the same

A display device comprising:

• a display panel in which pixels are disposed in regions in which a plurality of gate lines and a plurality of data lines intersect;
• a gate driver configured to output a gate signal through the gate line;
• a data driver configured to output a data voltage through the data line;
• and
• a timing controller configured to control the gate driver and the data driver,
• wherein the data driver includes a sensing circuit configured to detect electrical characteristics of the pixels and generate sensing data, and
• the sensing circuit includes:
• a first switch connected between a first reference voltage line to which a first reference voltage is applied and each of a plurality of sensing lines;
• a sample and hold part including a first sample and hold part configured to sample a voltage supplied through a sensing line connected to each of a plurality of first sensing channels and a second sample and hold part configured to sample a voltage supplied through a sensing line connected to at least one second sensing channel;
• an amplifier configured to receive the sampled voltage from the sample and hold part and amplify the sampled voltage;
• and
• an analog-digital (AD) converter configured to convert the amplified voltage into digital data and generate sensing data,
• wherein the second sample and hold part is selectively activated according to a mode control signal.