Pixel of organic light emitting display device and organic light emitting display device having the same
A pixel of an organic light emitting display device and an organic light emitting display device having the same includes an organic light emitting diode, a first switching transistor configured to transfer a data signal, a storage capacitor configured to store the data signal, a driving transistor configured to generate a driving current of the organic light emitting diode, a first initialization transistor and a second initialization transistor configured to simultaneously provide an initialization signal to the organic light emitting diode and the driving transistor, a second switching transistor configured to be turned on in response to a second scan signal and transfer the data signal or the initialization signal, a first emission control transistor configured to transfer a high power voltage to the driving transistor, and a second emission control transistor configured to transfer the driving current to the organic light emitting diode.
1. A pixel of an organic light emitting display device comprising:
an organic light emitting diode and a driving transistor serially connected between a high power voltage and a low power voltage;
a first switching transistor connected between a data signal line and a source electrode of the driving transistor;
a storage capacitor connected between the high power voltage and a gate electrode of the driving transistor;
a second switching transistor connected between the gate electrode of the driving transistor and a drain electrode of the driving transistor;
a first initialization transistor and a second initialization transistor serially connected between a drain electrode of the driving transistor and an initialization line; and
a first emission control transistor connected between the drain electrode of the driving transistor and an anode of the organic light emitting diode,
wherein a node disposed between the first initialization transistor and the second initialization transistor is connected to the anode of the organic light emitting diode, a first electrode of the first initialization transistor is connected to the initialization line, a second electrode of the first initialization transistor is connected to a first electrode of the second initialization transistor at the node, and a second electrode of the second initialization transistor is directly connected to the drain electrode of the driving transistor,
wherein a gate electrode of the first switching transistor is connected to a first scan signal line which provides a first scan signal and a gate electrode of the second switching transistor is connected to a second scan signal line which provides a second scan signal different from the first scan signal,
wherein the second switching transistor is turned on in response to the second scan signal before the first switching transistor is turned on in response to the first scan signal,
wherein the first initialization transistor and the second initialization transistor are turned on in response to an initialization control signal before the second switching transistor is turned on in response to the second scan signal, and
wherein a turn-on state of the first initialization transistor and the second initialization transistor does not overlap a turn-on state of the first switching transistor, the turn-on state of the first initialization transistor and the second initialization transistor partially overlaps a turn-on state of the second switching transistor, and the turn-on state of the second switching transistor partially overlaps the turn-on state of the first switching transistor.
2. The pixel of the organic light emitting display device of claim 1 , further comprising a second emission control transistor connected between the high power voltage and the source electrode of the driving transistor.
3. An organic light emitting display device comprising:
a display panel including a plurality of pixels;
a data driver configured to provide a data signal to the pixel;
a scan driver configured to provide a first scan signal and a second scan signal; and
a timing controller configured to generate a control signal that controls the data driver and the scan driver,
wherein the pixel includes:
an organic light emitting diode and a driving transistor serially connected between a high power voltage and a low power voltage;
a first switching transistor connected between a data signal line and a source electrode of the driving transistor;
a storage capacitor connected between the high power voltage and a gate electrode of the driving transistor;
a second switching transistor connected between the gate electrode of the driving transistor and a drain electrode of the driving transistor;
a first initialization transistor and a second initialization transistor serially connected between a drain electrode of the driving transistor and an initialization line; and
a first emission control transistor connected between the drain electrode of the driving transistor and an anode of the organic light emitting diode,
wherein a node disposed between the first initialization transistor and the second initialization transistor is connected to the anode of the organic light emitting diode, a first electrode of the first initialization transistor is connected to the initialization line, a second electrode of the first initialization transistor is connected to a first electrode of the second initialization transistor at the node, and a second electrode of the second initialization transistor is directly connected to the drain electrode of the driving transistor,
wherein a gate electrode of the first switching transistor is connected to a first scan signal line which provides a first scan signal and a gate electrode of the second switching transistor is connected to a second scan signal line which provides a second scan signal different from the first scan signal,
wherein the second switching transistor is turned on in response to the second scan signal before the first switching transistor is turned on in response to the first scan signal,
wherein the first initialization transistor and the second initialization transistor are turned on in response to an initialization control signal before the second switching transistor is turned on in response to the second scan signal, and
wherein a turn-on state of the first initialization transistor and the second initialization transistor does not overlap a turn-on state of the first switching transistor, the turn-on state of the first initialization transistor and the second initialization transistor partially overlaps a turn-on state of the second switching transistor, and the turn-on state of the second switching transistor partially overlaps the turn-on state of the first switching transistor.
4. The pixel of the organic light emitting display device of claim 3 , further comprising a second emission control transistor connected between the high power voltage and the source electrode of the driving transistor.