Organic light emitting display device

• US 8,432,334 B2
• Filed: 08/11/2010
• Issued: 04/30/2013
• Est. Priority Date: 08/20/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Bang, Hyun-Chol, Kwak, Won-Kyu
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): MORALES FERNANDEZ, BENJAMIN
• Application Number:
  US12/805,645
• Publication Number:
  US 20110043495A1
• Time in Patent Office: 993 Days
• Field of Search: None
• US Class Current: 345/76
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An organic light emitting display device, comprises a pixel unit including a plurality of pixels, each of the pixels including an organic light emitting diode having a first electrode, a second electrode, and an organic light emitting layer; a built-in-circuit comprising a driving circuit configured to drive the pixels; and a bus unit comprising bus lines configured to deliver pixel power to the pixels. The pixel unit, the built-in-circuit, and the bus unit are sequentially disposed from a central region of a display panel to an outer side of the display panel. The second electrode of the organic light emitting diode and one of the bus lines are electrically connected to each other through one of conductive patterns formed on at least a part of the built-in-circuit and at least a part of the bus unit.

Claims

1. An organic light emitting display device, comprising:

a pixel unit comprising a plurality of pixels, each of the pixels including an organic light emitting diode having a first electrode, a second electrode, and an organic light emitting layer;

a built-in-circuit comprising a driving circuit configured to drive the pixels;

a bus unit comprising bus lines configured to deliver pixel power to the pixels; and

a sealing unit that includes a sealing agent, wherein;

the pixel unit, the built-in-circuit, and the bus unit are sequentially disposed from a central region of a display panel to an outer side of the display panel,

the second electrode of the organic light emitting diode and one of the bus lines are electrically connected to each other through one of conductive patterns formed on at least a part of the built-in-circuit and at least a part of the bus unit, the one of conductive patterns contacting the one of the bus lines in a contact region within the bus unit, and

the sealing agent partially overlaps the bus lines, and the sealing agent is in a non-overlapping relationship with the built-in-circuit and the contact region within the bus unit.

2. The organic light emitting display device as claimed in claim 1, wherein at least a part of the second electrode of the organic light emitting diode is formed on the each whole pixel in the pixel unit.

3. The organic light emitting display device as claimed in claim 2, wherein the second electrode of the organic light emitting diode is a cathode electrode, and each of the bus lines delivers low potential pixel power to the cathode electrode.

4. The organic light emitting display device as claimed in claim 1, wherein the conductive patterns are formed on the same layer as the first electrode of the organic light emitting diode, and are made of the same material as the first electrode of the organic light emitting diode.

5. The organic light emitting display device as claimed in claim 4, wherein the first electrode of the organic light emitting diode is an anode electrode, and the conductive patterns are made of the same material as the anode electrode.

6. The organic light emitting display device as claimed in claim 1, wherein the second electrode of the organic light emitting diode is connected to one of the conductive patterns on the built-in-circuit, and the bus lines are connected to the conductive patterns on the bus unit.

7. The organic light emitting display device as claimed in claim 1, wherein each of the pixels further includes a first thin film transistor electrically connected to the organic light emitting diode,

wherein the bus lines are formed on the same layer as any one of a gate electrode, source electrode, and drain electrode of the first thin film transistor, and are made of the same material as any one of the gate electrode, the source electrode and the drain electrode of the first thin film transistor.

8. The organic light emitting display device as claimed in claim 7,

wherein the built-in-circuit further comprises a second thin film transistor electrically connected to the organic light emitting diode, and

wherein the bus lines are formed on the same layer as the source and drain electrodes of the second thin film transistor, and are made of the same material as the source and drain electrodes of the second thin film transistor.

9. The organic light emitting display device as claimed in claim 1, further comprising cathode contacts, each of the cathode contacts including a contact region in which one of the conductive patterns is connected to the second electrode of the organic light emitting diode,

wherein the cathode contacts are disposed so as to overlap the built-in-circuit.

10. The organic light emitting display device as claimed in claim 1, wherein:

the sealing agent is configured to seal a region including the pixel unit, and

the sealing unit is disposed so as to partially overlap the bus unit.

11. The organic light emitting display device as claimed in claim 1, wherein the built-in-circuit includes either of a scan driving unit and a light emitting control driving unit, or both of the scan driving unit and the light emitting control driving unit.

12. The organic light emitting display device as claimed in claim 11, wherein the built-in-circuit is formed on both sides of the pixel unit, and both sides of the pixel unit face each other.

13. The organic light emitting display device as claimed in claim 1, wherein the built-in-circuit is in a non-overlapping relationship with the sealing unit, and the sealing unit partially overlaps the bus unit.

14. The organic light emitting display device as claimed in claim 13, wherein the built-in-circuit is in a non-overlapping relationship with the bus unit.

15. The organic light emitting display device as claimed in claim 14, wherein the sealing agent partially overlaps the bus lines in a width direction, the width direction being defined as a direction extending from the central region to the outer side of the display panel.

16. The organic light emitting display device as claimed in claim 1, wherein the bus lines extend between the bus unit and the sealing unit along a width direction, and the sealing agent overlaps portions of the bus lines in the sealing unit along the width direction such that other portions of the bus lines along the width direction are in a non-overlapping relationship with the sealing agent.