Organic light emitting display device and method of driving the same

1. A method of driving an organic light emitting display device, the method comprising:

dividing one frame into one blank frame and a plurality of sub-frames;

determining whether a data signal to be applied to a pixel circuit of the organic light emitting display device is a data signal of a high gray-level region or a data signal of a low gray-level region based on a predetermined reference gray-level;

applying the data signal to the pixel circuit in all of the sub-frames when the data signal is the data signal of the high gray-level region; and

applying a first setting data signal corresponding to a gray-level higher than the reference gray-level to the pixel circuit in some of the sub-frames, and applying a second setting data signal corresponding to a zeroth gray-level to the pixel circuit in other sub-frames among the sub-frames when the data signal is the data signal of the low gray-level region,

wherein the organic light emitting display device implements a gray-level corresponding the data signal by controlling a current flowing through an organic light emitting diode of each pixel circuit thereof based on the data signal, which is an analog driving voltage.

2. The method of claim 1 , wherein the gray-level corresponding to the data signal is implemented using an average value of respective sub-frame gray-levels, which are displayed in the sub-frames.

3. The method of claim 2 , wherein the first setting data signal is substantially equally set for each of the sub-frames when the data signal is the data signal of the low gray-level region.

4. The method of claim 2 , wherein the first setting data signal is unequally set for each of the sub-frames when the data signal is the data signal of the low gray-level region.

5. The method of claim 1 , wherein a scan operation and an emission operation for the pixel circuit are performed in the sub-frames.

6. The method of claim 5 , wherein the sub-frames have substantially a same time length as each other.

7. The method of claim 5 , wherein the sub-frames have different time lengths from each other.

8. The method of claim 5 , wherein the emission operation for the pixel circuit is performed in a sequential emission manner in each of the sub-frames.

9. The method of claim 5 , wherein the emission operation for the pixel circuit is performed in a simultaneous emission manner in each of the sub-frames.

10. The method of claim 1 , wherein an initialization operation and a threshold voltage compensation operation for the pixel circuit are performed in the blank frame.

11. The method of claim 10 , wherein the blank frame is arranged prior to the sub-frames in the one frame.

12. An organic light emitting display device comprising:

a display panel comprising a plurality of pixel circuits;

a scan driving unit configured to provide a scan signal to the pixel circuits;

a data driving unit configured to provide a data signal to the pixel circuits;

an emission control unit configured to provide an emission control signal to the pixel circuits;

a power unit configured to provide a high power voltage and a low power voltage to the pixel circuits;

a timing control unit configured to divide one frame into one blank frame and a plurality of sub-frames, and configured to control the scan driving unit, the data driving unit and the emission control unit to implement a gray-level corresponding to the data signal using an average value of respective sub-frame gray-levels displayed in the sub-frames; and

a frame setting unit configured to set a time length and a quantity of the sub-frames, a reference gray-level for determining whether the data signal is a data signal of a high gray-level region or a data signal of a low gray-level region, and first and second setting data signals for the data signal of the low gray-level region.

13. The device of claim 12 , wherein the data driving unit applies the data signal to the pixel circuits in all of the sub-frames when the data signal is the data signal of the high gray-level region.

14. The device of claim 12 , wherein

the data driving unit applies the first setting data signal corresponding to a gray-level higher than the reference gray-level to the pixel circuits in some of the sub-frames, and

the data driving unit applies the second setting data signal corresponding to a zeroth gray-level to the pixel circuits in other sub-frames among the sub-frames when the data signal is the data signal of the low gray-level region.

15. The device of claim 12 , wherein the emission control unit sequentially applies the emission control signal to the pixel circuits when an emission operation for the pixel circuits is performed in each of the sub-frames.

16. The device of claim 12 , wherein the emission control unit simultaneously applies the emission control signal to the pixel circuits when an emission operation for the pixel circuits is performed in each of the sub-frames.

17. The device of claim 12 , wherein the frame setting unit sets respective time lengths of the sub-frames to be substantially equal to each other.

18. The device of claim 12 , wherein the frame setting unit sets respective time lengths of the sub-frames to be unequal to each other.

19. The device of claim 12 , wherein the frame setting unit equally sets the first setting data signal for each of the sub-frames when the data signal is the data signal of the low gray-level region.

20. The device of claim 12 , wherein the frame setting unit unequally sets the first setting data signal for each of the sub-frames when the data signal is the data signal of the low gray-level region.