Display device and driving method of display device

A display device comprising:

• a display panel which displays an image;
• a panel driving block which receives an image signal from an outside and provides a data signal to the display panel;
• and
• a temperature measuring sensor disposed on or in the display panel, wherein the temperature measuring sensor measures a temperature of the display panel and provides a measurement temperature to the panel driving block,
• wherein the displays the image based on one reference luminance among a plurality of reference luminances,
• wherein the one reference luminance is changed from one to another among the reference luminances while the image is displayed,
• wherein the panel driving block includes:
• a controller which generates image data based on the image signal, wherein the controller includes:
• a first memory which stores a plurality of reference gamma voltages respectively corresponding to the reference luminances;
• a temperature difference calculating part which calculates a temperature difference between a reference temperature and the measurement temperature, wherein the reference temperature is a temperature corresponding to the one reference luminances among a plurality of reference temperatures;
• and
• a compensation part which generates a correction gamma voltage by correcting a reference gamma voltage based on the temperature difference between the reference temperature and the measurement temperature, wherein the reference gamma voltage is a voltage corresponding to the one reference luminance among the reference gamma voltages;
• and
• a source driver which generates the data signal based on the image data and the correction gamma voltage and provides the data signal to the display panel.