Patent ID: 7675501

Claim:
A display apparatus comprising: a light generating part to generate a first light in response to a driving signal; a first driving part to output a panel driving signal; a display panel to receive the first light from the light generating part or a second light externally provided, and to display an image in response to the panel driving signal; a light sensing part disposed in the display panel so as to output a sensing signal in response to a light amount of the second light; a second driving part to compare the sensing signal with a predetermined reference value, and to provide the driving signal to the light generating part in accordance with the compared result, wherein the display panel comprises a display area having a plurality of gate lines and a plurality of data lines to display the image and a peripheral area adjacent to the display area, and the light sensing part is disposed in the display area; the light sensing part has a sensing transistor to output the sensing signal in response to the second light, and a first storage capacitor to charge a first voltage corresponding to the sensing signal, and a first readout wire electrically connected to the first storage capacitor so as to readout the first voltage; the first driving part has a gate driving circuit having a plurality of stages connected one after another to each other so as to output a gate signal to the gate lines in response to a first driving voltage, a second driving voltage and a start signal; and the sensing transistor has a drain electrode receiving the first driving voltage, a gate electrode receiving the second driving voltage, and a source electrode outputting the sensing signal.