Patent ID: 7561128

Claim:
An organic electroluminescence display device including a plurality of data lines for transferring a data signal, a plurality of gate lines, arranged to cross the data lines, for transferring a gate signal, and a plurality of pixels formed by the data lines and the gate lines, the respective pixel comprising: a first switching transistor having a drain terminal connected to the data line and a gate terminal connected to the gate line; a second switching transistor having a source terminal connected directly to the source terminal of the first switching transistor and a gate terminal receiving a gate signal of a previous pixel; a capacitor having one terminal connected to the source terminals of the first and second switching transistors; a third switching transistor having a source terminal connected to the drain terminal of the second switching transistor, a drain terminal receiving an external voltage, and a gate terminal receiving a control signal; a driving transistor having a drain terminal connected to the source terminal of the third switching transistor and a gate terminal connected to a common source terminal of the first and second switching transistors; a fourth switching transistor having a drain terminal connected to the source terminal of the driving transistor and one terminal of the capacitor, a source terminal connected to a ground terminal, and a gate terminal receiving the gate signal of the previous pixel; and an organic light emitting means, connected to the source terminal of the driving transistor, for emitting light according to an amount of current flowing through the source terminal of the driving transistor.