Patent ID: 7759863

Claim:
An electroluminescent display device, comprising: a shielding pattern on a substrate; a thin film transistor including a semiconductor layer that is disposed on the shielding pattern and that has an active portion and source and drain ohmic contact portions, wherein the thin film transistor further includes a gate electrode corresponding to the active portion, and source and drain electrodes connected to the source and drain ohmic contact portions, respectively; an organic electroluminescent diode connected to the thin film transistor; a power line connected to the thin film transistor and the shielding pattern; a buffer layer between the shielding pattern and the semiconductor layer; a gate insulating layer between the semiconductor layer and the gate electrode; and an interlayer insulating film between the gate electrode and the source and drain electrodes, wherein the buffer layer, the gate insulating layer and the interlayer insulating layer has a contact hole through which the power line contacts the shielding pattern, and wherein the shielding pattern covers the active portion.