CURRENT LIMITING ELEMENT FOR PIXELS IN ELECTRONIC DEVICES

• US 20110193066A1
• Filed: 08/11/2010
• Published: 08/11/2011
• Est. Priority Date: 08/13/2009
• Status: Abandoned Application

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Trujillo, Johann Thomas, Coe, Nigel Morton, Parker, Ian D.
• Application Number:
  US12/854,456
• Publication Number:
  US 20110193066A1
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/179 Interconnections, e.g. wiring lines or terminals

Abstract

An apparatus for pixellated radiation configured to prevent short-circuits from adversely impacting display quality. A current limiting element connects a pixel to a power bus to minimize effects of pixel failures. Failure of a single pixel will have minimum impact on perceived display quality, thus avoiding failure of an entire row or column which would be noticeable to an observer of the display.

Claims

1. An electronic device comprising:

a power bus;

a first conductive element;

a second conductive element;

a first organic active material; and

a first current limiting element wherein the first and second conductive elements and first organic active material form a first pixel, and the first current limiting element forms an electrical connection between the power bus and the first pixel.

2. The electronic device of claim 1 further comprising:

a second pixel; and

a second current limiting element wherein the second current limiting element forms an electrical connection between the power bus and the second pixel.

3. The electronic device of claim 1 wherein the first pixel is comprised of at least a first and a second sub-pixel.

4. The electronic device of claim 1 wherein the first conductive element is an anode.

5. The electronic device of claim 4 wherein the anode comprises a metal oxide.

6. The electronic device of claim 5 wherein the metal oxide is indium tin oxide.

7. The electronic device of claim 1 wherein the first current limiting element comprises an organic material.

8. The electronic device of claim 1 wherein the first current limiting element comprises an inorganic material.

9. The electronic device of claim 1 wherein the first current limiting element comprises a resistive material with resistivity of 100 to 10,000 ohms.

10. The electronic device of claim 9 wherein the resistive material has a serpentine pattern.

11. The electronic device of claim 10 wherein the electronic device is an organic light emitting diode display.

12. The electronic device of claim 10 wherein the electronic device is an organic light emitting diode lamp.

13. An organic light emitting diode device comprising:

a substrate;

a power bus;

a first conductive element;

a second conductive element;

a first organic active material; and

a first current limiting resistor wherein the first and second conductive elements and first organic active material form a first pixel, and the first current limiting resistor forms an electrical connection between the power bus and the first pixel.

14. The organic light emitting diode device of claim 13 wherein the first conductive element is an anode.

15. The organic light emitting diode device of claim 14 wherein the anode comprises a metal oxide.

16. The organic light emitting diode device of claim 15 wherein the metal oxide is indium tin oxide.

17. The organic light emitting diode device of claim 13 wherein the first current limiting resistor has a resistivity of 100 to 10,000 ohms.

18. The organic light emitting diode device of claim 17 wherein the resistive material has a serpentine pattern.

19. The organic light emitting diode device of claim 18 wherein the organic light emitting diode device is a display.

20. The organic light emitting diode device of claim 18 wherein the organic light emitting diode device is a lamp.