Abstract: A power supply and a light emitting display device using the same and having an improved efficiency, are disclosed. The light emitting display device includes a driving transistor and a light emitting element for emitting light according to an operation of the driving transistor. A first voltage supplied to the driving transistor and a second voltage supplied to the light emitting element are established so that an absolute value of the first power supply voltage is greater than or equal to an absolute value of the second power supply voltage.

Abstract: A flat panel display device includes a display region formed on a substrate, the display region having a gate electrode, a source electrode, a drain electrode, and a self-emission device with two electrodes, and displaying a predetermined image; a covering member to cover at least the display region; a sealing member comprising a sealing material coated outside and around at least the display region, by which edges of the covering member are bonded to the substrate to seal at least the display region; a terminal region installed on the substrate outside the sealing member; and a driving power supply line to supply a driving potential power and/or a source current to the display region, the driving power supply line comprising at least two conductive layers and being arranged in such a way that at least a part of the driving power supply line is positioned between the sealing member and the substrate.