Patent ID: 7859494
Filing Date: 2010-12-28
Classification: G09G

Abstract:
1. A display device comprising: a light emitting element; a storage capacitor; a driving transistor which has a control terminal and supplies a driving current to the light emitting element to emit light; a first switching transistor which applies a data voltage to the control terminal of the driving transistor and the storage capacitor in response to a first gate scanning signal, a light sensor which senses an amount of light according to the light emitted from the light emitting element and generates a sensing signal depending on the sensed light amount; a signal controller which determines a luminance corresponding to the sensing signal, compares the determined luminance and a target luminance corresponding to the data voltage, and modifies an image signal; a second switching transistor which applies a reverse bias voltage to the control terminal of the driving transistor and the capacitor in response to a second gate scanning signal before the data voltage is applied to the driving transistor; a third switching transistor which connects the driving transistor to a driving voltage according to an inversion signal during the application of the data voltage to the driving transistor; and an inversion unit which comprises: wherein an on-pulse of the second gate scanning signal applied to the second switching transistor occurs prior to an on-pulse of the first gate scanning signal applied to the first switching transistor.