Organic light emitting display device and driving method thereof
An organic light emitting display device and a driving method thereof are disclosed. The display device has sub-pixels of multiple colors. In one aspect, the organic light emitting display device detects sub-pixels which are positioned at the edges of the panel. Data for the sub-pixels on the edges are reduced so that colors on the edges are less observable.
1. An organic light emitting display device, comprising:
a display panel including a plurality of sub-pixels arranged in a sub-pixel color arrangement, wherein the display panel is configured to operate in a plurality of positions, each position having a sub-pixel color pattern based on the sub-pixel color arrangement;
a scan driver configured to drive scan lines coupled to the sub-pixels;
a data processor configured to receive a first data and to generate a second data based on the first data, wherein the first data is supplied according to the sub-pixel color pattern based on the sub-pixel color arrangement, wherein the data processor generates the second data by changing grayscale values of the first data for only sub-pixels positioned in each edge of the display panel; and
a data driver configured to drive data lines coupled to the sub-pixels and positioned in a direction intersecting the scan lines, wherein the data lines are driven by the first or second data.
2. The organic light emitting display device according to claim 1 , wherein the data processor comprises a dimming unit that generates the second data, wherein the dimming unit is configured to decide whether the first data is a data for the first line, the last line or the other lines of the display panel.
3. The organic light emitting display device according to claim 2 , wherein the dimming unit generates the second data by reducing the grayscale values of the first data.
4. The organic light emitting display device according to claim 2 , wherein the dimming unit is configured to generate the second data by changing the grayscale values of the first data supplied to selected sub-pixels positioned in each column of the display panel based on the decision of the dimming unit.
5. The organic light emitting display device according to claim 1 , wherein pixel regions are provided to the display panel, and any one of blue and red sub-pixels and a green sub-pixel are arranged in a diagonal direction in each pixel region.
6. The organic light emitting display device according to claim 5 , wherein red and blue sub-pixels are repetitively arranged in a particular column of the display panel, and green sub-pixels are repetitively arranged in a column adjacent to the particular column.
7. A method of driving an organic light emitting display device, the method comprising:
sensing a sub-pixel color pattern of a display panel having a plurality of sub-pixels arranged in a sub-pixel color arrangement and configured to operate in a plurality of positions, wherein the sub-pixel color pattern is based on the position of the display panel and the sub-pixel color arrangement; and
generating second data by changing grayscale values of first data to be supplied to only sub-pixels positioned in each edge of the panel, wherein the first data is supplied according to the sub-pixel color pattern.
8. The method according to claim 7 , wherein the display panel includes pixel regions, and any one of blue and red sub-pixels and a green sub-pixels are arranged in a diagonal direction in each pixel region.
9. The method according to claim 8 , wherein the red and blue sub-pixels are repetitively arranged in a particular column of the panel, and the green sub-pixels are repetitively arranged in a column adjacent to the particular column.
10. The method according to claim 8 , wherein a blue sub-pixel, a red sub-pixel and two green sub-pixels, arranged in two adjacent pixel regions, constitute a pixel.
11. The method according to claim 7 , wherein the second data is generated by reducing the grayscale values of the first data.
12. The method according to claim 7 , wherein generating the second data comprises:
deciding whether the first data is a data for the first line, the last line or the other lines of the display panel;
generating the second data by changing the grayscale value of the first data supplied to all sub-pixels positioned in the first line when the first data is for the first line;
generating the second data by changing the grayscale values of the first data supplied to all sub-pixels positioned in the last line when the first data is for the last line; and
generating the second data by changing the grayscale values of the first data supplied to the first and last sub-pixels of a line when the first data is for a line other than the first and last lines.
13. The method according to claim 12 , wherein generating the second data corresponding to the first line comprises:
generating the second data by changing the grayscale values of the first data for sub-pixels positioned at outermost edges for the sub-pixels included in the first and last pixels; and
generating the second data by changing the grayscale values of the first data for sub-pixels positioned at outermost edges for the sub-pixels not included in the first and last pixels.
14. The method according to claim 12 , wherein generating the second data corresponding to the last line comprises:
generating the second data by changing the grayscale values of the first data for sub-pixels positioned at outermost edges for the sub-pixels included in the first and last pixels; and
generating the second data by changing the grayscale values of the first data for sub-pixels positioned at outermost edges for the sub-pixels not included in the first and last pixels.
15. The method according to claim 12 , wherein generating the second data corresponding to the other lines comprises:
deciding whether the first data is for the first or last sub-pixel;
generating the second data by changing the grayscale values of the first data when it is decided that the first data is for the first sub-pixel; and
generating the second data by changing the grayscale values of the first data when it is decided that the first data is for the last sub-pixel.
16. The method according to claim 15 , further comprising deciding whether the first and last sub-pixels are positioned on an odd-numbered or even-numbered line.
17. The method according to claim 7 , wherein generating second data by changing grayscale values of the first data comprises changing the grayscale values of the first data supplied to selected sub-pixels positioned in each column of the display panel.