Display device and display driving method

A display device comprising:

• a display panel in which a plurality of subpixels including a light emitting element that emits light by a subpixel driving voltage supplied to a driving voltage line, and a plurality of reference voltage lines connected to the plurality of subpixels to detect a characteristic value are disposed;
• a data driving circuit configured to supply a display driving reference voltage lower than the subpixel driving voltage, to the driving voltage line through the plurality of reference voltage lines;
• a base voltage switching circuit configured to control a base voltage node connected to a cathode electrode of the light emitting element;
• a current detecting circuit configured to detect a current flowing between the base voltage node and a ground;
• and
• a timing controller configured to control the base voltage switching circuit and generate a defect detection signal for the driving voltage line according to a current detected from the current detecting circuit by supplying the display driving reference voltage to the driving voltage line through a reference voltage line during a period in which the subpixel driving voltage is not supplied or has a level lower than the display driving reference voltage.