Display device

A display device comprising:

• a display part including:
• a display area that includes pixels formed in the vicinity of intersections of plural signal lines intersecting with plural select switch lines;
• a display scanning circuit that applies a select signal to the select switch lines;
• a signal driving circuit that supplies a display signal to the signal lines;
• a power line that supplies a current for illuminating each of the plural pixels with brightness corresponding to the display signal from the signal driving circuit;
• and
• a power circuit that supplies a current to the power line;
• a detection control line that is provided in parallel with the select switch lines to detect current values of the pixels;
• and
• a detection scanning circuit that applies a scanning signal to the detection control line;
• and
• a detection unit including:
• a current source that outputs plural constant current values;
• a detection unit changeover means that selects one of the constant current values of the current source corresponding to variations in environmental temperatures;
• and
• a signal correction control unit is connected to the signal driving circuit and corrects the display signal to be supplied to the signal line,
• wherein the display unit includes a display unit changeover means that alternatively selects the signal driving circuit and the detection unit changeover means for the signal line.