Display device and inspecting method thereof

A display device comprising:

• a touch unit including touch electrodes;
• and
• a touch driving circuit,
• wherein the touch driving circuit includes:
• a driving signal output unit configured to output a touch driving signal;
• a charge pump configured to boost an analog voltage having a first potential to a high potential power source having a second potential;
• a sensing circuit unit configured to sense raw data corresponding to a change in capacitance of the touch electrodes;
• an analog-to-digital converter configured to convert the raw data acquired by the sensing circuit unit into digital data;
• and
• a touch controller,
• wherein the touch controller is configured to:
• control the driving signal output unit to output a first touch driving signal having the first potential,
• control the sensing circuit unit to acquire first raw data based on an output of the first touch driving signal,
• control the driving signal output unit to output a second touch driving signal having the second potential,
• control the sensing circuit unit to acquire second raw data based on an output of the second touch driving signal,
• calculate a ratio between the first raw data and the second raw data, and
• determine the charge pump is normal, based on the calculated ratio being in a designated range.