DISPLAY APPARATUS AND METHOD OF REPAIRING THE SAME

• US 20130162619A1
• Filed: 06/18/2012
• Published: 06/27/2013
• Est. Priority Date: 12/27/2011
• 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: Lee, June-Woo, Choi, Jae-Beom, Jung, Kwan-Wook, Jin, Guang-Hai
• Granted Patent: US 8,845,378 B2
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• 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 and a method of repairing a display apparatus are disclosed. According to one aspect, the display includes a plurality of unit pixels each including a plurality of sub pixels, scan lines branching off a scan wire in a first direction for each of the plurality of unit pixels and connecting the plurality of sub pixels emitting the same color as that of a neighboring unit pixel, data lines extending in a second direction orthogonal to the first direction and connected to the plurality of sub pixels, a first power supply line extending in the second direction and connected to the plurality of sub pixels, and second power supply lines extending in the first direction and connected to the first power supply line.

Claims

1. A display apparatus comprising:

a plurality of unit pixels each comprising a plurality of sub pixels;

scan lines branching off a scan wire in a first direction for each of the unit pixels, the scan lines being connected to the sub pixels emitting the same color as that of a neighboring unit pixel;

data lines extending in a second direction orthogonal to the first direction, the data lines being connected to the plurality of sub pixels;

a first power supply line extending in the second direction, the first power supply line being connected to the plurality of sub pixels; and

second power supply lines extending in the first direction, the second power supply lines being connected to the first power supply line.

2. The display apparatus of claim 1, wherein the second power supply lines are disposed between each of the scan lines connected to the plurality of sub pixels of the unit pixels.

3. The display apparatus of claim 2, wherein the second power supply lines are all connected to the sub pixels of each of the unit pixels.

4. The display apparatus of claim 1, wherein the sub pixels emit the same color in the first direction, and emit different colors in the second direction.

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

6. The display apparatus of claim 1, wherein a length of the first power supply line is shorter than those of the scan lines.

7. The display apparatus of claim 1, wherein the data lines are independently connected to the plurality of sub pixels.

8. The display apparatus of claim 1, further comprising a test pad disposed on the scan wire, the test pad being connected to each of the scan lines.

9. The display apparatus of claim 1, wherein the first power supply line is disconnected in a region of at least one of the plurality of unit pixels, and wherein the region corresponds to a region in which the scan lines and the first power supply line overlap.

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

11. The display apparatus of claim 10, wherein the first electrode is a transparent electrode, and wherein the second electrode is a reflective electrode.

12. The display apparatus of claim 10, wherein the scan lines, the data lines, the first power supply line, and the second power supply lines do not overlap with the first electrode.

13. The scan driving circuit of claim 1, wherein each of the plurality of sub pixels comprises at least three thin film transistors (TFTs) and at least two capacitors.

14. The scan driving circuit of claim 1, further comprising a plurality of compensation control signal lines extending in the second direction and connected to the plurality of sub pixels.

15. A method of repairing a display apparatus comprising a plurality of unit pixels each comprising a plurality of sub pixels, scan lines branching off a scan wire in a first direction for each of the plurality of unit pixels and connecting the sub pixels emitting the same color as that of a neighboring unit pixel, data lines extending in a second direction orthogonal to the first direction and connected to the plurality of sub pixels, a first power supply line extending in the second direction and connected to the plurality of sub pixels;

and second power supply lines extending in the first direction and connected to the first power supply line, the method comprising;

measuring a voltage difference at both ends of a region in which the scan lines branch off in the first direction and a voltage difference at both ends of the first power supply line;

detecting a location of a defective unit pixel that is shorted between the scan lines and the first power supply line based on the measured voltage difference; and

disconnecting the first power supply line from each sub pixel of the detected defective unit pixel.

16. The method of claim 15, wherein test pads are further disposed in the region in which the scan lines branch off, and wherein the test pads are used to determine a voltage difference at both ends of the region in which the scan lines branch off.

17. The method of claim 15, wherein the second power supply lines are disposed between each of the scan lines connected to the sub pixels of the unit pixels, and a power supply to all the sub pixels of the detected defective unit pixel.