Transparent organic light emitting display device and method for manufacturing the same

• US 9,093,669 B2
• Filed: 12/10/2013
• Issued: 07/28/2015
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Binn, Park, SungHee, Kim, JongMoo
• Primary Examiner(s): Pham, Hoai V
• Application Number:
  US14/102,194
• Publication Number:
  US 20140183479A1
• Time in Patent Office: 595 Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

Provided are an organic light emitting display device and a method for manufacturing the same. The organic light emitting display device includes a plurality of pixels, each including a set of sub pixels. Each of the sub pixels has an emissive area for emitting light and a transmissive area for passing the external light. At least two sub pixels are symmetrically arranged on each side of an auxiliary electrode, and share the auxiliary electrode.

Claims

1. A transparent organic light emitting display device, comprising:

a plurality of sub pixels, each of the sub pixels including a first area associated with a first function of the sub-pixel and a second area associated with a second function of the sub-pixel; and

a plurality of auxiliary electrodes electrically connected to the plurality of sub pixels via a conductive element, wherein the plurality of sub pixels include a first sub pixel and a second sub pixel, and

wherein each of the auxiliary electrodes is disposed between the first sub-pixel and the second sub-pixel such that the auxiliary electrode is closer to the first area of the first sub-pixel and the first area of the second sub-pixel than the second area of the first sub-pixel and the second area of the second sub-pixel.

2. The transparent organic light emitting display device of claim 1, wherein the first function is to emit light for displaying of an image and the second function is to transmit external light.

3. The transparent organic light emitting display device of claim 2, wherein the first sub-pixel and the second sub-pixel each include an organic emission layer, the organic emission layer and the conductive element are not disposed in the second area of the first sub-pixel and the second sub-pixel.

4. The transparent organic light emitting display device of claim 1, further comprising:

a partition disposed directly on some areas of the auxiliary electrode, other areas of the auxiliary electrode not directly contacted to the partition including an exposed remaining part of the auxiliary electrode; and

wherein the conductive element includes a transparent conductive layer, a cathode of the first sub-pixel, and a cathode of the second sub-pixel, the transparent conductive layer covering the partition and in contact with the auxiliary electrode, the cathode of the first sub-pixel and the cathode of the second sub pixel.

5. The transparent organic light emitting display device of claim 4, further comprising:

a plurality of banks including at least a first bank between an anode of the first sub pixel and the auxiliary electrode, and a second bank between an anode of the second sub pixel and the auxiliary electrode.

6. The transparent organic light emitting display device of claim 1, wherein the first function is to transmit external light and the second function is to emit light for displaying of an image.

7. The transparent organic light emitting display device of claim 6, wherein the conductive element includes a transparent conductive layer, a cathode of the first sub-pixel, and a cathode of the second sub-pixel, the transparent conductive layer covering the auxiliary electrode, the cathode of the first sub-pixel, and the cathode of the second sub pixel, wherein the cathode of the first sub-pixel and the cathode of the second sub-pixel are not disposed in the first area of the first sub-pixel and the first area of the second sub-pixel.

8. The transparent organic light emitting display device of claim 1, wherein the auxiliary electrode is made of a same material as an anode of the first sub-pixel and an anode of the second sub-pixel, the auxiliary electrode formed on a same plane as the anode of the first sub-pixel and the anode of the second sub-pixel on the substrate.

9. The transparent organic light emitting display device of claim 1, wherein the auxiliary electrode comprises a first conductive layer including a transparent material formed on a second conductive layer including a reflective material or the auxiliary comprises the second conductive layer.

10. A transparent organic light emitting display device, comprising:

a plurality of sub pixels, each of the sub pixels including an emissive area and a transmissive area; and

a plurality of auxiliary electrodes electrically connected to a respective conductive element in each of the sub pixels, wherein said sub pixels include a first sub pixel and a second sub pixel that are symmetrically arranged to each other relative to the auxiliary electrode.

11. The transparent organic light emitting display device of claim 10, wherein each of the auxiliary electrodes is disposed between the first sub-pixel and the second sub-pixel such that the auxiliary electrode is closer to an emissive area of the first sub-pixel and an emissive area of the second sub-pixel than a transmissive area of the first sub-pixel and a transmissive area of the second sub-pixel.

12. The transparent organic light emitting display device of claim 10, wherein each of the auxiliary electrodes is disposed between the first sub-pixel and the second sub-pixel such that the auxiliary electrode is closer to a transmissive area of the first sub-pixel and a transmissive area of the second sub-pixel than an emissive area of the first sub-pixel and an emissive area of the second sub-pixel.

13. The transparent organic light emitting display device of claim 10, wherein the plurality of auxiliary electrodes is arranged to extend in a first direction, and wherein at least two sub pixels are disposed between two adjacent auxiliary electrodes in which said at least two sub pixels are arranged in a second direction substantially perpendicular to the first direction.

14. A transparent organic light emitting display device, comprising:

an auxiliary electrode including a first side and a second side, the auxiliary electrode extending in a first direction; and

a first pixel including a first plurality of sub-pixels disposed on the first side of the auxiliary electrode;

a second pixel including a second plurality of sub-pixels disposed on the second side of the auxiliary electrode;

wherein at least one of the first plurality of sub-pixels of the first pixel is connected to the auxiliary electrode and at least one of the second plurality of sub-pixels of the second pixel is connected to the auxiliary electrode; and

wherein at least one of the first plurality of sub-pixels of the first pixel is not connected to the auxiliary electrode and at least one of the second plurality of sub-pixels of the second pixel is not connected to the auxiliary electrode.

15. The transparent organic light emitting display device of claim 14, wherein:

the first plurality of sub-pixels each include a first area associated with a first function and a second area associated with a second function; and

the second plurality of pixels each include a first area associated with the first function and a second area associated with the second function.

16. The transparent organic light emitting display device of claim 15, wherein a portion of the auxiliary electrode in contact with the at least one sub pixel of the first pixel and the at least one sub-pixel of the second pixel is larger than other portions of the auxiliary electrode not in contact with one sub-pixel of the first pixel and one sub-pixel of the second pixel.

17. The transparent organic light emitting display device of claim 15, wherein the at least one of the first plurality of sub-pixels connected to the auxiliary electrode and the at least one of the second plurality of sub-pixels connected to the auxiliary electrode emit light of a same color.

18. The transparent organic light emitting display device of claim 17, wherein the light of the same color is green.

19. The transparent organic light emitting display device of claim 14, wherein the at least one sub pixel of the first pixel that is in contact with the auxiliary electrode is smaller in size than the other first plurality of sub-pixels that are not in contact with the auxiliary electrode and the at least one sub pixel of the second pixel that is in contact with the auxiliary electrode is smaller in size than the other second plurality of sub-pixels that are not in contact with the auxiliary electrode.

20. The transparent organic light emitting display device of claim 14, further comprising:

a partition disposed on the auxiliary electrode between the one of the first plurality of sub-pixels connected to the auxiliary electrode and the one of the second plurality of sub-pixels connected to the auxiliary electrode; and

a conductive element covered over the partition, the at least one of the first plurality of sub-pixels of the first pixel and the at least one of the second plurality of sub-pixels of the second pixel connected to the auxiliary electrode via the conductive element.