ORGANIC LIGHT EMITTING DISPLAY DEVICE

• US 20100020059A1
• Filed: 07/08/2009
• Published: 01/28/2010
• Est. Priority Date: 07/23/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Suh, Mi-Sook
• Granted Patent: US 8,665,249 B2
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0852 being a dynamic memory with more than one capacitor
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

An organic light emitting display device capable of ensuring the drive stability. The organic light emitting display includes a plurality of pixels; first signal supply lines respectively coupled to the pixels disposed in at least two horizontal lines; and second signal supply lines being lower in number than the first signal supply lines and respectively coupled to the pixels disposed in the horizontal lines includes a scan driver driving the first and second signal supply lines; a data driver driving data lines disposed in a direction that is crossed to the first and second signal supply lines; and a dummy pattern block providing dummy patterns so that loads of the second signal supply lines are identical to loads of the first signal supply lines.

Claims

1. An organic light emitting display device including a plurality of pixels;

first signal supply lines respectively coupled to the pixels disposed in at least two horizontal lines;

second signal supply lines being lower in number than the first signal supply lines, respectively coupled to the pixels disposed in the horizontal lines, the organic light emitting display device comprising;

a scan driver driving the first signal supply lines and second signal supply lines;

a data driver driving data lines disposed in a direction that crosses the first signal supply lines and second signal supply lines; and

a dummy pattern block, wherein loads of the second signal supply lines are identical to loads of the first signal supply lines.

2. The organic light emitting display device according to claim 1, wherein a length of the dummy pattern block is a shorter length than a parallel length of the pixels.

3. The organic light emitting display device according to claim 1, wherein the dummy patterns are made of a metal material that is different from a metal material of the second signal supply lines.

4. The organic light emitting display device according to claim 3, wherein the second signal supply lines are made of a gate metal, and the dummy pattern is formed of one of a source metal, a drain metal or a semiconductor layer.

5. The organic light emitting display device according to claim 1, wherein the dummy patterns are electrically coupled to at least one of constant voltage sources supplied to the organic light emitting display device.

6. The organic light emitting display device according to claim 1, wherein the dummy patterns are overlapped with the second signal supply lines so that parasitic capacitance of the second signal supply lines is approximately identical to parasitic capacitance of the first signal supply lines.

7. The organic light emitting display device according to claim 1, wherein the dummy pattern block is disposed in at least one region of an upper portion and a lower portion of the panel except for the active region.

8. A method of stably driving an organic light emitting display device having a plurality of pixels;

first signal supply lines respectively coupled to the pixels disposed in at least two horizontal lines;

second signal supply lines being lower in number than the first signal supply lines, respectively coupled to the pixels disposed in the horizontal lines;

the method of stably driving the organic light emitting display device comprising;

driving the first signal supply lines and second signal supply lines with a scan driver;

driving data lines with a data driver, wherein the data lines are disposed across the first signal supply lines and second signal supply lines; and

providing equal parasitic capacitance to the first signal supply lines and the second signal supply lines to stably drive the plurality of pixels.

9. The method of claim 8, wherein the providing of the equal parasitic capacitance comprises a dummy pattern block providing a dummy pattern so that loads of the first signal supply lines and loads of the second signal supply lines are identical.

10. The method of claim 9, wherein the dummy pattern block comprises a length of the dummy pattern block being shorter than a parallel length of the pixels.

11. The method of claim 9, wherein the dummy patterns are made of a metal material that is different from a metal material of the second signal supply lines.

12. The method of claim 11, wherein the second signal supply lines are made of a gate metal, and the dummy pattern is formed of one of a source metal, a drain metal or a semiconductor layer.

13. The method of claim 9, wherein the dummy patterns are electrically coupled to at least one of constant voltage sources supplied to the organic light emitting display device.

14. The method of claim 9, wherein the dummy patterns are overlapped with the second signal supply lines so that parasitic capacitance of the second signal supply lines can be identical to parasitic capacitance of the first signal supply lines.

15. The method of claim 9, wherein the dummy pattern block is disposed in at least one region of an upper portion and a lower portion of the panel except for the active region.