Method of operating an organic light emitting display device, and organic light emitting display device
A method of operating an organic light emitting diode (OLED) display device and an OLED display using the method are disclosed. In one aspect, input data is received, the input data is converted into mapped data based on random data mapping information, one sub-frame pattern is selected from a plurality of sub-frame patterns based on the random data mapping information, and an image is formed for the display device based on the mapped data and the selected sub-frame pattern.
1. A method of operating an organic light emitting display device comprising:
receiving input data;
converting the input data into mapped data based on random data mapping information;
selecting one sub-frame pattern from a plurality of sub-frame patterns based on the random data mapping information; and
forming an image for the display device based on the mapped data and the selected sub-frame pattern.
2. The method of claim 1 , wherein the plurality of sub-frame patterns have different gray levels at which dynamic false contours occur.
3. The method of claim 1 , wherein luminances of a plurality of pixels included in the organic light emitting display device are measured at a maximum gray level, and the random data mapping information is generated based on the measured luminances of the plurality of pixels such that the plurality of pixels have substantially a same luminance when displaying a white image.
4. The method of claim 1 , wherein the sub-frame pattern is selected according to sub-frame pattern selection information stored in the organic light emitting display device.
5. The method of claim 4 , wherein the sub-frame pattern selection information is generated based on a white image gray level distribution determined by the random data mapping information.
6. The method of claim 5 , wherein the sub-frame pattern selection information is generated based on a middle value or an average value of the white image gray level distribution.
7. The method of claim 1 , wherein selecting the sub-frame pattern is performed at each frame.
8. The method of claim 7 , wherein selecting the sub-frame pattern from the plurality of sub-frame patterns includes:
identifying a gray level distribution of the mapped data at each frame; and
selecting the sub-frame pattern from the plurality of sub-frame patterns based on the gray level distribution of the mapped data.
9. The method of claim 8 , wherein the sub-frame pattern is selected based on a middle value or an average value of the gray level distribution of the mapped data.
10. An organic light emitting display device, comprising:
a display unit including a plurality of pixels; and
a driving unit configured to receive input data, to convert the input data into mapped data based on random data mapping information, to select one sub-frame pattern from a plurality of sub-frame patterns based on the random data mapping information, and to control the display unit to form an image for the display device based on the mapped data and the selected sub-frame pattern.
11. The organic light emitting display device of claim 10 , wherein the plurality of sub-frame patterns have different gray levels at which dynamic false contours occur.
12. The organic light emitting display device of claim 10 , wherein luminances of a plurality of pixels included in the organic light emitting display device are measured at a maximum gray level, and the random data mapping information is generated based on the measured luminances of the plurality of pixels such that the plurality of pixels have substantially a same luminance when displaying a white image.
13. The organic light emitting display device of claim 10 , wherein the driving unit further comprises:
a random data mapping information storing unit configured to store the random data mapping information;
a sub-frame pattern storing unit configured to store the plurality of sub-frame patterns; and
a selection information storing unit configured to store sub-frame pattern selection information indicating the sub-frame pattern selected from the plurality of sub-frame patterns.
14. The organic light emitting display device of claim 13 , wherein the driving unit is configured to drive the display unit by using the sub-frame pattern indicated by the sub-frame pattern selection information stored in the selection information storing unit.
15. The organic light emitting display device of claim 13 , wherein the sub-frame pattern selection information is generated based on a white image gray level distribution determined by the random data mapping information.
16. The organic light emitting display device of claim 15 , wherein the sub-frame pattern selection information is generated based on a middle value or an average value of the white image gray level distribution.
17. The organic light emitting display device of claim 10 , wherein the driving unit further comprises:
a random data mapping information storing unit configured to store the random data mapping information;
a sub-frame pattern storing unit configured to store the plurality of sub-frame patterns; and
a sub-frame pattern selecting unit configured to select the sub-frame pattern from the plurality of sub-frame patterns.
18. The organic light emitting display device of claim 17 , wherein the sub-frame pattern selecting unit selects the sub-frame pattern at each frame.
19. The organic light emitting display device of claim 17 , wherein the sub-frame pattern selecting unit identifies a gray level distribution of the mapped data at each frame, and selects the sub-frame pattern from the plurality of sub-frame patterns based on the gray level distribution of the mapped data.
20. The organic light emitting display device of claim 19 , wherein the sub-frame pattern selecting unit calculates a middle value or an average value of the gray level of the mapped data, and selects the sub-frame pattern from the plurality of sub-frame patterns based on the calculated middle value or the calculated average value.