A display device having an integrated fingerprint sensor and a single light source, the display device comprising: a display panel comprising a display area, an emitting area corresponding to at least a part of the display area, a sensor area corresponding to at least a part of the display area, pixels disposed in the display area and defining the single light source, and photo sensors disposed in the sensor area and configured to generate sensing signals upon operation thereof; and a driving circuit configured to: generate a first signal, during a first mode, for displaying an image in the display area using the pixels; generate a second signal, during a second mode, for increasing the luminance of at least some of the pixels in the emitting area; perform a fingerprint sensing operation based upon sensing signals generated by the photo sensors during the second mode; and change a characteristic of the emitting area on the basis of a result of the fingerprint sensing operation, wherein the driving circuit comprises: a panel driving unit configured to supply the first signal and second signals; a detecting unit configured to detect a fingerprint based upon at least some of the sensing signals received from the photo sensors; and a setting unit configured to effect the said change to the characteristic of the emitting area, characterised in that the setting unit comprises: a sensing counter configured to generate count information indicating a number of times the fingerprint sensing operation is performed; and a size setting unit configured to change the characteristic of the emitting area based on the count information, and wherein the size setting unit is further configured to increase or decrease the size of the emitting area based on the number of times the fingerprint sensing operation is performed. a display panel comprising a display area, an emitting area corresponding to at least a part of the display area, a sensor area corresponding to at least a part of the display area, pixels disposed in the display area and defining the single light source, and photo sensors disposed in the sensor area and configured to generate sensing signals upon operation thereof; and a driving circuit configured to: generate a first signal, during a first mode, for displaying an image in the display area using the pixels; generate a second signal, during a second mode, for increasing the luminance of at least some of the pixels in the emitting area; perform a fingerprint sensing operation based upon sensing signals generated by the photo sensors during the second mode; and change a characteristic of the emitting area on the basis of a result of the fingerprint sensing operation, generate a first signal, during a first mode, for displaying an image in the display area using the pixels; generate a second signal, during a second mode, for increasing the luminance of at least some of the pixels in the emitting area; perform a fingerprint sensing operation based upon sensing signals generated by the photo sensors during the second mode; and change a characteristic of the emitting area on the basis of a result of the fingerprint sensing operation, wherein the driving circuit comprises: a panel driving unit configured to supply the first signal and second signals; a detecting unit configured to detect a fingerprint based upon at least some of the sensing signals received from the photo sensors; and a setting unit configured to effect the said change to the characteristic of the emitting area, characterised in that the setting unit comprises: a sensing counter configured to generate count information indicating a number of times the fingerprint sensing operation is performed; and a size setting unit configured to change the characteristic of the emitting area based on the count information, and wherein the size setting unit is further configured to increase or decrease the size of the emitting area based on the number of times the fingerprint sensing operation is performed. a panel driving unit configured to supply the first signal and second signals; a detecting unit configured to detect a fingerprint based upon at least some of the sensing signals received from the photo sensors; and a setting unit configured to effect the said change to the characteristic of the emitting area, characterised in that the setting unit comprises: a sensing counter configured to generate count information indicating a number of times the fingerprint sensing operation is performed; and a size setting unit configured to change the characteristic of the emitting area based on the count information, and wherein the size setting unit is further configured to increase or decrease the size of the emitting area based on the number of times the fingerprint sensing operation is performed. a sensing counter configured to generate count information indicating a number of times the fingerprint sensing operation is performed; and a size setting unit configured to change the characteristic of the emitting area based on the count information, and wherein the size setting unit is further configured to increase or decrease the size of the emitting area based on the number of times the fingerprint sensing operation is performed.