Organic light emitting display device having pixels and method of driving the same

摘要

Disclosed herein is an organic light emitting display device capable of stably compensating for a threshold voltage of a driving transistor. The organic light emitting display device according the present invention includes pixels, each for storing a voltage of a data signal in a storage capacitor through a first threshold voltage different from a second threshold voltage of a driving transistor for driving the pixel; scan lines and light emitting control lines respectively coupled to the pixels; and data lines for supplying the data signal to the pixels.

主权项

1. An organic light emitting display device comprising:
pixels, each of the pixels being configured to store a voltage of a data signal in a storage capacitor through a first threshold voltage different from a second threshold voltage of a driving transistor for driving the pixel; scan lines and light emitting control lines respectively coupled to the pixels; and data lines for supplying the data signal to the pixels, wherein each of the pixels comprises:
a second transistor having a first electrode directly coupled to a second electrode of the driving transistor and directly coupled to a first electrode of an emission control transistor, and a gate electrode directly coupled to a gate electrode of the driving transistor;an organic light emitting diode;the driving transistor for controlling an amount of current supplied from a first power supply coupled to a first electrode thereof, to the organic light emitting diode corresponding to a voltage charged in the storage capacitor;the second transistor coupled between the second electrode and the gate electrode of the driving transistor, and having a gate electrode coupled to the gate electrode of the driving transistor;a third transistor coupled between the second transistor and the gate electrode of the driving transistor, and configured to be turned on when a scan signal is supplied to a current scan line; a fourth transistor coupled between the data line and the first electrode of the driving transistor, and configured to be turned on when the scan signal is supplied to a current scan line; a fifth transistor coupled between the first power supply and the first electrode of the driving transistor, and configured to be turned on when the light emitting control signal is not supplied to a corresponding one of the light emitting control lines; and a seventh transistor coupled between the gate electrode of the driving transistor and an initialization power supply, and configured to be turned on when the scan signal is supplied to a previous scan line, wherein the emission control transistor is a sixth transistor coupled between the second electrode of the driving transistor and the organic light emitting diode, and configured to be turned on when the light emitting control signal is not supplied.