DISPLAY APPARATUS AND METHOD OF REPAIRING THE SAME

• US 20130307833A1
• Filed: 10/31/2012
• Published: 11/21/2013
• Est. Priority Date: 05/18/2012
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, June-Woo, Choi, Jae-Beom, Jung, Kwan-Wook, Choi, Sung-Soo, Kim, Seong-Jun, Jin, Guang-Hai, Kim, Ga-Young, Kim, Jee-Hoon
• Application Number:
  US13/665,579
• Publication Number:
  US 20130307833A1
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/0205 Simultaneous scanning of several lines in flat panels
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/3225 using an active matrix

Abstract

A display apparatus is disclosed. The display apparatus includes a plurality of scan lines branching off from each of a plurality of scan wires. Each scan line connects one of the scan wires to adjacent sub pixels of the same color. An insulating layer is disposed between the scan lines and the scan wire. A plurality of contact holes is formed in the insulating layer so as to electrically connect the scan lines and the scan wires. In addition, a plurality of data lines intersect the scan lines, and are connected to the sub pixels, and first power supply lines extend in the second direction and connected to the plurality of sub pixels.

Claims

1. A display apparatus comprising:

a plurality of unit pixels each including a plurality of sub pixels, wherein each sub pixel emits light of a predetermined color;

a plurality of scan wires;

a plurality of scan lines branching off from each of the scan wires and extending in a first direction, wherein each scan line connects one of the scan wires to adjacent sub pixels of the same color, and wherein the number of the scan lines for each scan wire is equal to the number of the plurality of sub pixels for each pixel;

an insulating layer disposed between the scan lines and the scan wire;

a plurality of contact holes formed in the insulating layer so as to electrically connect the scan lines and the scan wires;

a plurality of data lines extending in a second direction intersecting the first direction, wherein the data lines are connected to the sub pixels; and

first power supply lines extending in the second direction and connected to the plurality of sub pixels.

2. The display apparatus of claim 1, wherein the plurality of sub pixels included in each of the plurality of unit pixels are sequentially arranged in the second direction.

3. The display apparatus of claim 2, wherein the data lines are each connected to sub pixels of the same color.

4. The display apparatus of claim 1, wherein the scan wire is disposed on a layer on which the data lines are disposed.

5. The display apparatus of claim 1, wherein the scan wire is disposed on a layer on which the first power supply lines are disposed.

6. The display apparatus of claim 1, wherein the data lines are shorter than the scan lines.

7. The display apparatus of claim 1, wherein the first power supply lines are shorter than the scan lines.

8. The display apparatus of claim 1, further comprising second power supply lines extending in the first direction and connected to the first power supply lines.

9. The display apparatus of claim 1, further comprising a plurality of test pads at both ends of each of the scan lines.

10. The display apparatus of claim 9, wherein the contact holes are respectively formed in locations corresponding to the test pads.

11. The display apparatus of claim 1, wherein each of the plurality of sub pixels comprises a first electrode, a second electrode, and an organic emission layer disposed between the first and second electrodes.

12. The display apparatus of claim 11, wherein the first electrode is a transparent electrode, and the second electrode is a reflective electrode.

13. The display apparatus of claim 11, wherein the scan lines, the data lines, and the first power supply voltage line do not overlap with the first electrodes.

14. The display apparatus of claim 1, further comprising second power supply lines extending in the first direction and connected to the first power supply lines.

15. The display apparatus of claim 1, further comprising compensation control signal lines extending in the second direction to be connected to the plurality of sub pixels.

16. The display apparatus of claim 1, wherein each of the plurality of sub pixels comprises at least two thin film transistors (TFTs) and at least one capacitor.

17. The display apparatus of claim 16, wherein:

each of the at least two TFTs comprises an active layer, a gate electrode, a source electrode, and a drain electrode, and

the insulating layer is disposed between the gate electrode and the source electrode, and between the gate electrode and the drain electrode.

18. The display apparatus of claim 17, wherein:

the scan lines are disposed on a layer on which the gate electrode is disposed, and

the scan wire is disposed on a layer on which the source electrode and the drain electrode are disposed.

19. A method of repairing a display apparatus which includes:

a plurality of unit pixels each including a plurality of sub pixels, wherein each sub pixel emits light of a predetermined color, a plurality of scan wires, and a plurality of scan lines branching off from each of the scan wires and extending in a first direction, wherein each scan line connects one of the scan wires to adjacent sub pixels of the same color, and wherein the number of the scan lines for each scan wire is equal to the number of the plurality of sub pixels for each pixel,

a plurality of data lines extending in a second direction intersecting the first direction, wherein the data lines are connected to the sub pixels, and

first power supply lines extending in the second direction and connected to the plurality of sub pixels, wherein

the method comprises;

detecting an open failure in one or more of the scan lines;

repairing a scan line having an open failure;

forming an insulating layer on the scan lines;

forming a plurality of contact holes in the insulating layer; and

forming the scan wire on the insulating layer to be electrically connected to the scan lines via the contact holes.

20. The method of claim 19, wherein the open failure is detected by determining the difference between voltages of both ends of each of the scan lines.

21. The method of claim 19, wherein:

each of the scan lines comprises test pads disposed at both ends thereof, and

the open failure is detected by determining the difference between voltages applied to the test pads.

22. The method of claim 21, wherein the contact holes are formed in locations corresponding to the test pads.

23. The method of claim 19, wherein the scan wires are formed on a layer on which the data lines are disposed.

24. The method of claim 19, wherein the scan wires are formed on a layer on which the first power supply lines are disposed.