Patent ID: 7893625

Claim:
An organic electroluminescent display device, comprising: an insulating substrate; a display region comprising a plurality of pixels on the insulating substrate; a plurality of gate lines and a plurality of data lines, each of the gate lines or each of the data lines extending between a first side and a second side of the display region; a power line extending across the display region and configured to supply a first voltage to all the pixels, wherein a voltage drop appears along the power line; and an electrode extending across the display region and having a contact configured to supply a second voltage to all the pixels, wherein a voltage drop appears along the electrode such that the voltage drop in the power line cancels out the voltage drop in the electrode, thereby applying a substantially uniform voltage difference between the power line and the electrode to each of the pixels, wherein an input side of the power line is only at the first side of the display region and the contact of the electrode is only at the second side of the display region opposite to the first side, the input side of the power line and the contact of the electrode being at a periphery of the display region such that all the pixels are located between the input side of the power line and the contact of the electrode.