Patent ID: 8081174

Claim:
An organic electroluminescent display device, comprising: a first substrate; a gate line on the first substrate; a data line crossing the gate line over the first substrate; a switching thin film transistor near the crossing of the gate line and data line; a driving thin film transistor system including a plurality of sub-TFTs connected in parallel to the switching thin film transistor via a gate base; a power line crossing the gate line over the first substrate and electrically connected with the plurality of sub-TFTs; an organic electroluminescent diode on a second substrate; and a connection pattern between the first and second substrates, the connection pattern electrically connecting the driving thin film transistor system to the organic electroluminescent diode, wherein the driving thin film transistor system includes first to fourth sub-TFTs having first to fourth driving gate electrodes, first to fourth driving source electrodes, first to fourth driving drain electrodes, and first to fourth active layers, wherein the first driving drain electrode and the second driving drain electrode include a first united body, and the third driving drain electrode and the fourth driving drain electrode include a second united body, and wherein the connection pattern contacts at least one middle of the first and second united bodies.