Display panel and organic light-emitting diode display including the same

1. A display panel for an organic light-emitting diode (OLED) display, the display panel comprising:

a first pixel configured to emit a first color of light;

a second pixel configured to emit a second color of light; and

a third pixel configured to emit a third color of light, wherein each of the first to third pixels includes:

a light emission current applying unit including a driving transistor and a storage capacitor, wherein a gate electrode of the driving transistor is configured to receive a data signal from a display driver of the OLED display;

a light emission unit configured to emit light based at least in part on a light emission current, wherein the light emission unit includes an OLED including a first electrode electrically connected to the light emission current applying unit and a second electrode electrically connected to a first power supply voltage, wherein the light emission current applying unit is configured to apply the light emission current to the light emission unit, wherein the driving transistor of the light emission current applying unit is configured to determine an amount of the light emission current based at least in part on a voltage level of the data signal, and wherein the storage capacitor is configured to maintain the voltage level of the data signal for a predetermined time; and

an initialization voltage supply unit configured to provide an initialization voltage to the gate electrode of the driving transistor and the first electrode of the OLED, wherein each of the first and second pixels further includes a boost capacitor directly connected to the gate electrode of the driving transistor and the first electrode of the OLED.

2. The panel of claim 1 , wherein the first pixel includes a red pixel configured to emit red light, and wherein the second pixel includes a blue pixel configured to emit blue light.

3. The panel of claim 1 , wherein the boost capacitor is configured to boost a voltage level of the gate electrode of the driving transistor based on a change of a voltage level of the first electrode of the OLED.

4. The panel of claim 1 , wherein the light emission unit is configured to not emit light while the storage capacitor maintains a voltage level for displaying black color corresponding to a (0)th gray-level.

5. The panel of claim 4 , wherein the light emission unit further includes a parallel-to-diode capacitor electrically connected between the first and second electrodes of the OLED.

6. The panel of claim 5 , wherein the parallel-to-diode capacitor includes a parasitic capacitor electrically connected between the first and second electrodes of the OLED.

7. The panel of claim 1 , wherein the light emission current applying unit is further configured to apply i) the data signal to the gate electrode of the driving transistor when a scan signal is activated and ii) the light emission current to the light emission unit when a light emission signal is activated.

8. The panel of claim 7 , wherein the light emission current applying unit further includes:

a data applying transistor including a gate electrode configured to receive the scan signal, a first electrode configured to receive the data signal, and a second electrode electrically connected to a first electrode of the driving transistor, wherein the storage capacitor is electrically connected between a second power supply voltage and the gate electrode of the driving transistor;

a voltage compensation transistor including a gate electrode configured to receive the scan signal, a first electrode electrically connected to a second electrode of the driving transistor, and a second electrode electrically connected to the gate electrode of the driving transistor;

a first light emission control transistor including a gate electrode configured to receive the light emission signal, a first electrode electrically connected to the second power supply voltage, and a second electrode electrically connected to the first electrode of the driving transistor; and

a second light emission control transistor including a gate electrode configured to receive the light emission signal, a first electrode electrically connected to the second electrode of the driving transistor, and a second electrode electrically connected to the light emission unit.

9. The panel of claim 7 , wherein the light emission current applying unit includes:

a data applying transistor including a gate electrode configured to receive the scan signal, a first electrode configured to receive the data signal, and a second electrode electrically connected to the gate electrode of the driving transistor, wherein a second electrode of the driving transistor is electrically connected to a second power supply voltage, and wherein the storage capacitor is electrically connected between the second power supply voltage and the gate electrode of the driving transistor; and

a light emission control transistor including a gate electrode configured to receive the light emission signal, a first electrode electrically connected to a first electrode of the driving transistor, and a second electrode electrically connected to the light emission unit.

10. The panel of claim 1 , wherein the initialization voltage supply unit is further configured to provide i) the initialization voltage to the gate electrode of the driving transistor when a gate initialization signal is activated and ii) the initialization voltage to the first electrode of the OLED when a diode initialization signal is activated.

11. The panel of claim 10 , wherein the initialization voltage supply unit includes:

a gate initialization transistor including a gate electrode configured to receive the gate initialization signal, a first electrode electrically connected to the initialization voltage, and a second electrode electrically connected to the gate electrode of the driving transistor; and

a diode initialization transistor including a gate electrode configured to receive the diode initialization signal, a first electrode electrically connected to the initialization voltage, and a second electrode electrically connected to the first electrode of the OLED.

12. The panel of claim 1 , wherein the initialization voltage supply unit comprises i) a gate initialization transistor having a gate electrode configured to receive a gate initialization signal and ii) a diode initialization transistor having a gate electrode configured to receive a diode initialization signal, and wherein the gate and diode initialization signals are different.

13. An organic light-emitting diode (OLED) display comprising:

a display panel including first to third pixels configured to respectively emit first to third colors of light;

a data driver configured to transmit a plurality of data signals to the display panel;

a scan driver configured to transmit a plurality of scan signals to the display panel;

a light emission driver configured to transmit a plurality of light emission signals to the display panel; and

a timing controller configured to control the data driver, the scan driver, and the light emission driver,

wherein each of the first to third pixels includes:

a light emission current applying unit including a driving transistor and a storage capacitor, wherein a gate electrode of the driving transistor is configured to receive a data signal from a display driver of the OLED display;

a light emission unit configured to emit light based at least in part on a light emission current, wherein the light emission unit includes an OLED including a first electrode electrically connected to the light emission current applying unit and a second electrode electrically connected to a first power supply voltage, wherein the light emission current applying unit is configured to apply the light emission current to the light emission unit, wherein the driving transistor of the light emission current applying unit is configured to determine an amount of the light emission current based at least in part on a voltage level of the data signal, and wherein the storage capacitor is configured to maintain the voltage level of the data signal for a predetermined time; and

an initialization voltage supply unit configured to provide an initialization voltage to the gate electrode of the driving transistor and the first electrode of the OLED, wherein each of the first and second pixels further includes a boost capacitor directly connected to the gate electrode of the driving transistor and the first electrode of the OLED.

14. The display of claim 13 , wherein the first pixel includes a red pixel configured to emit red light, and wherein the second pixel includes a blue pixel configured to emit blue light.

15. The display of claim 13 , wherein the boost capacitor is configured to boost a voltage level of the gate electrode of the driving transistor based on a change of a voltage level of the first electrode of the OLED.

16. The display of claim 13 , wherein the light emission unit is configured to not emit light while the storage capacitor maintains a voltage level for displaying black color corresponding to a (0)th gray-level.

17. The display of claim 16 , wherein the light emission unit further includes a parallel-to-diode capacitor electrically connected between the first and second electrodes of the OLED.

18. The display of claim 13 , wherein the light emission current applying unit is further configured to apply i) the data signal to the gate electrode of the driving transistor when a selected scan signal is activated, and ii) the light emission current to the light emission unit when a light emission signal is activated.

19. The display of claim 18 , wherein the light emission current applying unit further includes:

a data applying transistor including a gate electrode configured to receive the selected scan signal, a first electrode configured to receive the data signal is applied, and a second electrode electrically connected to a first electrode of the driving transistor, wherein the storage capacitor is electrically connected between a second power supply voltage and the gate electrode of the driving transistor;

a voltage compensation transistor including a gate electrode configured to receive the selected scan signal, a first electrode electrically connected to a second electrode of the driving transistor, and a second electrode electrically connected to the gate electrode of the driving transistor;

a first light emission control transistor including a gate electrode configured to receive the light emission signal, a first electrode electrically connected to the second power supply voltage, and a second electrode electrically connected to the first electrode of the driving transistor; and

a second light emission control transistor including a gate electrode configured to receive the light emission signal, a first electrode electrically connected to the second electrode of the driving transistor, and a second electrode electrically connected to the light emission unit.

20. The display of claim 13 , wherein the initialization voltage supply unit is further configured to provide i) the initialization voltage to the gate electrode of the driving transistor when a gate initialization signal is activated and ii) the initialization voltage to the first electrode of the OLED when a diode initialization signal is activated.

21. The display of claim 20 , wherein the initialization voltage supply unit includes:

a gate initialization transistor including a gate electrode configured to receive the gate initialization signal, a first electrode electrically connected to the initialization voltage, and a second electrode electrically connected to the gate electrode of the driving transistor; and

a diode initialization transistor including a gate electrode configured to receive the diode initialization signal, a first electrode electrically connected to the initialization voltage, and a second electrode electrically connected to the first electrode of the OLED.