OLED lighting device with short tolerant structure

• US 9,704,942 B2
• Filed: 11/12/2015
• Issued: 07/11/2017
• Est. Priority Date: 01/12/2011
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Levermore, Peter, Rajan, Kamala, Pang, Huiqing, Ma, Ruiqing, Mandlik, Prashant, Silvernail, Jeffrey, Paynter, Jason
• Primary Examiner(s): Le, Tung X
• Application Number:
  US14/939,797
• Publication Number:
  US 20160079313A1
• Time in Patent Office: 607 Days
• Field of Search: 257 40, 257 98, 313504
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/179 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/1795 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/84 Parallel electrical configurations of multiple OLEDs

Abstract

A first device that may include a short tolerant structure, and methods for fabricating embodiments of the first device, are provided. A first device may include a substrate and a plurality of OLED circuit elements disposed on the substrate. Each OLED circuit element may include a fuse that is adapted to open an electrical connection in response to an electrical short in the pixel. Each OLED circuit element may comprise a pixel that may include a first electrode, a second electrode, and an organic electroluminescent (EL) material disposed between the first and the second electrodes. Each of the OLED circuit elements may not be electrically connected in series with any other of the OLED circuit elements.

Claims

1. A device, comprising:

a substrate;

a plurality of segmented bus lines; and

a plurality of OLED circuit elements disposed on the substrate, each of the plurality of OLED circuit elements comprising;

exactly one pixel, the exactly one pixel comprising;

a first electrode;

a second electrode; and

an organic electroluminescent (EL) material disposed between the first electrode and the second electrode; and

a fuse adapted to open an electrical connection in response to excess current in the pixel;

wherein each of the plurality of OLED circuit elements is not electrically connected in series with any other of the plurality of OLED circuit elements;

wherein the plurality of segmented bus lines electrically connect the first electrode of each of the plurality of OLED circuit elements together; and

wherein no first electrode of any of the plurality of OLED circuit elements directly physically connects to the first electrode of any other of the plurality of OLED circuit elements.

2. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the pixel is electrically connected in series with the fuse.

3. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the first electrode or the second electrode comprises the fuse.

4. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the fuse is configured to open in response to a current that is 100% greater than a maximum operating current of the pixel.

5. The device of claim 1, wherein the plurality of OLED circuit elements are commonly addressable.

6. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the fuse comprises Indium-Tin-Oxide or Indium-Zinc-Oxide.

7. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the fuse and the first electrode are integrally coupled.

8. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the fuse and the first electrode result from simultaneous fabrication.

9. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, a thickness of the fuse is approximately the same as a thickness of the first electrode.

10. The device of claim 1, wherein, within at least one of the plurality of OLED circuit elements, the first electrode has a thickness such that the first electrode, in response to an excess current, opens an electrical circuit.

11. A device, comprising:

a substrate;

a plurality of segmented bus lines; and

a plurality of OLED circuit elements disposed on the substrate, each of the plurality of OLED circuit elements comprising;

exactly one pixel, the exactly one pixel comprising;

a first electrode;

a second electrode; and

an organic electroluminescent (EL) material disposed between the first electrode and the second electrode; and

a fuse adapted to open an electrical connection in response to excess current in the pixel;

wherein each of the plurality of OLED circuit elements is not electrically connected in series with any other of the plurality of OLED circuit elements;

wherein the plurality of OLED circuit elements comprises at least three OLED circuit elements;

wherein each of the plurality of segmented bus lines electrically connects exactly two of the plurality of OLED circuit elements; and

wherein no segmented bus line of the plurality of segmented bus lines connects to any other segmented bus line of the plurality of segmented bus lines.

12. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the pixel is electrically connected in series with the fuse.

13. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the first electrode or the second electrode comprises the fuse.

14. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the fuse is configured to open in response to a current that is 100% greater than a maximum operating current of the pixel.

15. The device of claim 11, wherein the plurality of OLED circuit elements are commonly addressable.

16. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the fuse comprises Indium-Tin-Oxide or Indium-Zinc-Oxide.

17. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the fuse and the first electrode are integrally coupled.

18. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the fuse and the first electrode result from simultaneous fabrication.

19. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, a thickness of the fuse is approximately the same as a thickness of the first electrode.

20. The device of claim 11, wherein, within at least one of the plurality of OLED circuit elements, the first electrode has a thickness such that the first electrode, in response to an excess current, opens an electrical circuit.