ORGANIC ELECTROLUMINESCENCE DEVICE

摘要

A driving system taking into consideration the conductivity of a TFT which controls the light emitting operations of a current-driven light emitting element. When an N-channel type TFT is used as the second TFT (30) which switches supply of a driving current to a light emitting element (40), a high gate voltage (Vgcur) is obtained by lowering the potential at a common feeder line (com) against the potential at the counter electrode (op) of the element (40). A p-channel TFT is used as a first TFT (20) and the polarity of the low potential of a scanning signal (Sgate), and the potential at the common feeder line (com) is made equal to that of the potential at a potential holding electrode (st) at turning- on time. The driving voltage of the light emitting element is dropped and the display quality of the element is improved by shifting the potential of picture signals (data) for turning on in the direction in which the turning-on resistances of the TFTs (20 and 30) become smaller within the range of the driving voltage of the display device (1).