Patent ID: 7821478
Filing Date: 2010-10-26
Classification: G09G

Abstract:
1. A display apparatus comprising row electrodes, column electrodes intersecting said row electrodes, a driving unit for supplying a scanning signal to said row electrodes and supplying data signals to said column electrodes, self-emissive elements respectively formed in regions corresponding to respective intersections of said row electrodes with said column electrodes, and element driving circuits respectively formed in regions corresponding to the respective intersections for driving said self-emissive elements in accordance with the scanning signal and the data signals, each of said element driving circuits including: at least one selection transistor having a control terminal connected to said row electrode and having a first and a second controlled terminal, said at least one selection transistor having a conducting channel between said first and second controlled terminals in response to a forward bias applied to said control terminal on receiving the scanning signal; a capacitor for accumulating charges which creates a voltage corresponding to the data signal supplied from said driving unit through said first and second controlled terminals of said selection transistor in a period in which said selection transistor has a conducting channel between said first and second controlled terminals; and a driving transistor having a control terminal connected to one end of said capacitor, and a first and a second controlled terminal, one of said first and second controlled terminals being connected to said self-emissive element, and said driving transistor supplying said self-emissive element with an amount of driving current depending on a forward bias which is applied to said control terminal in response to the voltage created on said capacitor, wherein said driving unit applies a reverse bias voltage to the control terminal of said driving transistor in a non-emission period in which the driving current is not applied to said self-emissive element, while changing at least one of a pulse width and an amplitude of said reverse bias voltage in accordance with an average peak level of an image signal.