Organic light-emitting display

• US 9,460,650 B2
• Filed: 03/13/2014
• Issued: 10/04/2016
• 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
• Primary Examiner(s): Lee, Nicholas
• Assistant Examiner(s): Taylor, Jr., Duane N
• Application Number:
  US14/207,829
• Publication Number:
  US 20140319486A1
• Time in Patent Office: 936 Days
• Field of Search: None
• US Class Current: 1/1
• 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:

a pair of first sub-pixels of a first color arranged adjacent to one another in different rows and corresponding to different unit pixels;

a pair of second sub-pixels of a second color adjacent to one another in different rows and corresponding to different unit pixels, the pair of first sub-pixels and the pair of second sub-pixels arranged alternately in a first column; and

third sub-pixels of a third color in a second column adjacent to the first column, wherein each third sub-pixel includes a light-emitting diode and a pixel circuit connected to the light-emitting diode, and each of the first sub-pixel and the second sub-pixel including;

a plurality of light-emitting diodes, each of which includes an anode electrode and a cathode electrode;

a pixel circuit to be selectively connected to at least one of the plurality of light-emitting diodes; and

a switch circuit between the pixel circuit and the plurality of light-emitting diodes,

wherein the switch circuit of the first sub-pixel in the first row is to selectively connect the pixel circuit of the first sub-pixel in the first row to at least one of the light-emitting diodes of the first sub-pixel in the first row and at least one of a plurality of light-emitting diodes of the first sub-pixel in the second row adjacent to the first row according to a state of the plurality of light-emitting diodes of the first sub-pixel in the first row, and

wherein the switch circuit of the second sub-pixel in the first row is to selectively connect the pixel circuit of the second sub-pixel in the first row to at least one of the light-emitting diodes of the second sub-pixel in the first row and at least one of a plurality of light-emitting diodes of the second sub-pixel in the second row according to a state of the plurality of light-emitting diodes of the second sub-pixel in the first row.

2. The display as claimed in claim 1, wherein the switch circuit of the first sub-pixel of the first unit pixel in the first row comprises:

a first switch circuit between the pixel circuit of the first sub-pixel in the first row to the light-emitting diodes of the first sub-pixel in the first row; and

a second switch circuit between the pixel circuit of the first sub-pixel in the first row to the light-emitting diodes of the first sub-pixel of the second unit pixel in the second row, and

wherein the switch circuit of the second sub-pixel of the first unit pixel in the first row comprises;

a first switch circuit between the pixel circuit of the second sub-pixel in the first row to the light-emitting diodes of the second sub-pixel in the first row; and

a second switch circuit between the pixel circuit of the second sub-pixel in the first row to the light-emitting diodes of the second sub-pixel of the second unit pixel in the second row.

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

the first switch circuit of the first sub-pixel in the first row includes multiple switches to selectively connect the pixel circuit of the first sub-pixel in the first row to at least one of the anode electrodes of the light-emitting diodes of the first sub-pixel in the first row, and

the second switch circuit of the first sub-pixel in the first row includes multiple switches to selectively connect the pixel circuit of the first sub-pixel in the first row to at last one of the anode electrodes of the light-emitting diodes of the first sub-pixel in the second row, and

wherein the first switch circuit of the second sub-pixel in the first row includes multiple switches to selectively connect the pixel circuit of the second sub-pixel in the first row to at least one of the anode electrodes of the light-emitting diodes of the second sub-pixel in the first row, and

the second switch circuit of the second sub-pixel in the first row includes multiple switches to selectively connect the pixel circuit of the second sub-pixel in the first row to at least one of the anode electrodes of the light-emitting diodes of the second sub-pixel in the second row.

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

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

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

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

the first switch circuit of the first sub-pixel in the first row connects the pixel circuit of the first sub-pixel in the first row to the second light-emitting diode of the first sub-pixel in the first row and the second switch circuit connects the pixel circuit of the first sub-pixel in the first row to one of a first light-emitting diode or a second light-emitting diode of the first sub-pixel in the second row.

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, and

the second switch circuit of the first sub-pixel in the first row connects the pixel circuit of the first sub-pixel in the first row to a first light-emitting diode and a second light-emitting diode of the first sub-pixel in the second row.

9. The display as claimed in claim 7, wherein the second light-emitting diode of the first sub-pixel in the first row and the one of the first light-emitting diode or the second light-emitting diode of the first sub-pixel in the second row connected to the second switch circuit are controlled to emit light at a same time.

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 in a first row which includes;

a plurality of first light-emitting diodes;

a first pixel circuit to output a driving current;

a first switch circuit between the first pixel circuit and the plurality of first light-emitting diodes, the first switch circuit to selectively connect the first pixel circuit to at least one of the plurality of first light-emitting diodes to transmit a driving current from the first pixel circuit to at least one of the plurality of first light-emitting diodes; and

a second switch circuit between the first pixel circuit and a plurality of second light-emitting diodes of a sub-pixel of a same color in a second row adjacent to the first row, the second switch circuit to selectively connect the first pixel circuit to at least one of the plurality of second light-emitting diodes to transmit the driving current from the first pixel circuit to at least one of the plurality of second light-emitting diodes.

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

a plurality of pixels, each pixel including a first sub-pixel of a first color, a second sub-pixel of a second color and a third sub-pixel of a third color, wherein;

a pair of the first sub-pixels are arranged consecutively in different rows, and

a pair of the second sub-pixels are arranged consecutively in different rows,

the pair of first sub-pixels and the pair of second sub-pixels are arranged alternately in a first column, and

the third sub-pixel is 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 first switching elements between the first pixel circuit and the first light-emitting diodes, and

the second switch circuit includes multiple second switching elements between the first pixel circuit and the second light-emitting diodes.

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 first light-emitting diodes is defective, a first switching element connected to the defective first light-emitting diode is turned off, and remaining ones of the first switching elements are turned on to connect the pixel circuit to remaining ones of the first light-emitting diodes and one of the second switching elements are turned on to connect the pixel circuit to one of the second light-emitting diodes.

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

when all of the first light-emitting diodes are defective, the first switching elements are turned off and the second switching elements are turned on.

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.