Display device capable of performing self diagnosis in relation to partial discharge

A display device capable of performing a self-diagnosis in relation to a partial discharge, the di splay device comprising:

• an image processor configured to process an image signal;
• and
• a display unit configured to display the processed image signal,
• wherein the image processor comprises:
• a detector configured to determine a group of parameters by detecting a waveform of a detected partial discharge and measuring each of the parameters of the waveform in a form of a binary number;
• and
• a controller configured to identify the detected partial discharge by comparing the determined group with previously stored groups,
• wherein the controller comprises an arithmetic unit configured to update the previously stored groups by performing an operation on at least one among the previously stored groups.