ORGANIC LIGHT-EMITTING DISPLAY

• US 20140319486A1
• Filed: 03/13/2014
• Published: 10/30/2014
• Est. Priority Date: 04/24/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: HONG, Sang-Min
• Granted Patent: US 9,460,650 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 2330/10 Dealing with defective pixels
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

An organic light-emitting display includes first sub-pixels of a first color and second sub-pixels of a second color. Pairs of the first sub-pixels are consecutively arranged in different rows, and pairs of the second sub-pixels are consecutively arranged in different rows. The pairs of first sub-pixels and the pairs of second sub-pixels arranged alternately in a first column, and third sub-pixels are in a second column adjacent to the first column. When one sub-pixel is defective, a control circuit provides current another sub-pixel of the same color.

Claims

1. An organic light-emitting display, comprising:

first sub-pixels of a first color and second sub-pixels of a second color, pairs of the first sub-pixels arranged consecutively in different rows and pairs of the second sub-pixels arranged consecutively in different rows, the pairs of first sub-pixels and the pairs of second sub-pixels arranged alternately in a first column; and

third sub-pixels in a second column adjacent to the first column,

wherein each of the first sub-pixels and each of the second sub-pixels in the first row including;

a light-emitting diode which includes multiple anode electrodes and a common cathode electrode;

a pixel circuit to supply current to the light-emitting diode; and

a switch circuit between the pixel circuit and light-emitting diode, the switch circuit to selectively deliver the current to at least one of a light-emitting diode in the first row and a light-emitting diode in a second row adjacent to the first row.

2. The display as claimed in claim 1, wherein the switch circuit comprises:

a first switch circuit to connect a pixel circuit in the first row with the light-emitting diode in the first row; and

a second switch circuit to connect the pixel circuit in the first row with the light-emitting diode in the second row.

3. The display as claimed in claim 2, wherein:

the first switch circuit includes multiple switches connected to the pixel circuit in the first row and multiple anode electrodes in the first row, and

the second switch circuit includes multiple switches connected to the pixel circuit in the first row and multiple anode electrodes in the second row.

4. The display as claimed in claim 3, wherein the multiple switch elements are PMOS transistors.

5. The display as claimed in claim 3, wherein the multiple switch elements are NMOS transistors.

6. The display as claimed in claim 2, wherein:

the multiple anode electrodes include first and second anode electrodes, and

the light-emitting diode include a first light-emitting diode which includes the first anode electrode and a common cathode electrode, and a second light-emitting diode which includes the second anode electrode and the common cathode electrode.

7. The display as claimed in claim 6, wherein:

when the first light-emitting diode of the first sub-pixel in the first row is defective, the second light-emitting diode in the first row and one of the first light-emitting diode or the second light-emitting diode of the first sub-pixel in the second row are controlled to emit light at a same time.

8. The display as claimed in claim 6, wherein:

when both the first light-emitting diode and the second light-emitting diode of the first sub-pixel in the first row are defective, the first light-emitting diode and the second light-emitting diode of the first sub-pixel in the second row emit light at the same time via the second switch circuit in the first row.

9. The display as claimed in claim 1, wherein the second row is adjacent the first row.

10. The display as claimed in claim 1, wherein the third sub-pixel has a height that is substantially twice or more than a height of the first sub-pixel or the second sub-pixel in a column direction.

11. The display as claimed in claim 1, wherein:

the first sub-pixels emit red light,

the second sub-pixels emit green light, and

the third sub-pixels emit blue light.

12. An organic light-emitting display, comprising:

a sub-pixel which includes;

a first light-emitting diode having multiple first anode electrodes and a first common cathode electrode;

a first pixel circuit to supply current to the first light-emitting diode;

a first switch circuit to selectively deliver the current supplied from the first pixel circuit to the multiple first anode electrodes; and

a second switch circuit to selectively deliver the current supplied from the first pixel circuit to multiple second anode electrodes that form a second light-emitting diode in an adjacent second row, wherein the first light-emitting diode receives the current supplied from the first pixel circuit or the current supplied from a second pixel circuit in the second row and emits light.

13. The display as claimed in claim 12, further comprising:

first sub-pixels of a first color, pairs of the first sub-pixels arranged consecutively in different rows;

second sub-pixels of a second color, pairs of the second sub-pixels arranged consecutively in different rows, the pairs of first sub-pixels and the pairs of second sub-pixels arranged alternately in a first column; and

third sub-pixels arranged in a second column adjacent to the first column,

wherein the sub-pixel is the first sub-pixel or the second sub-pixel.

14. The display as claimed in claim 12, wherein:

the first switch circuit includes multiple switching elements connected to the first pixel circuit and the multiple first anode electrodes, and

the second switch circuit includes multiple switching elements connected to the first pixel circuit and the multiple second anode electrodes.

15. The display as claimed in claim 14, wherein the multiple switching elements are PMOS transistors.

16. The display as claimed in claim 14, wherein the multiple switching elements are NMOS transistors.

17. The display as claimed in claim 14, wherein:

when one of the multiple first anode electrodes is defective, a switch connected to another anode electrode among the multiple first anode electrodes and a switch connected to one of the multiple second anode electrodes are turned on to distribute the current from the first pixel circuit to the respective anode electrodes.

18. The display as claimed in claim 14, wherein:

when all of the multiple first anode electrodes are defective, switches connected to the multiple first anode electrodes are turned off and switches connected to the multiple second anode electrodes are turned on, to distribute the current from the first pixel circuit to the multiple second anode electrodes.

19. The display as claimed in claim 12, wherein:

the first sub-pixel emits red light;

the second sub-pixel emits green light; and

the third sub-pixel emits blue light.

20. A display device, comprising:

a plurality of first light emitters;

a plurality of second light emitters; and

a control circuit to provide current to at least one of the second light emitters when at least one of the first light emitters is defective, the plurality of first light emitters correspond to a pixel and the plurality of second light emitters correspond to an adjacent pixel.