INDEPENDENTLY CONTROLLED STACKED INVERTED ORGANIC LIGHT EMITTING DIODES AND A METHOD OF MANUFACTURING SAME

• US 20130033199A1
• Filed: 10/09/2012
• Published: 02/07/2013
• Est. Priority Date: 10/05/2009
• Status: Active Grant

• Current Assignee: eMagin Corporation (Samsung Electronics Co. Ltd.)
• Original Assignee: eMagin Corporation (Samsung Electronics Co. Ltd.)
• Inventors: Ali, Tariq, Ghosh, Amulkumar P., Khayrullin, Ilyas
• Granted Patent: US 8,883,553 B2
• Time in Patent Office: Days
• US Class Current: 315/312
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths

Abstract

An OLED apparatus is provided that includes a first electrode having a first polarity, and an electrode arrangement spaced apart from the first electrode and having a second polarity. The OLED apparatus also includes a first organic emissive layer interposed between the first electrode and the electrode arrangement, and a second electrode spaced apart from the electrode arrangement in a direction opposite the first electrode. The second electrode has the first polarity. The OLED apparatus further includes a second organic emissive layer interposed between the second electrode and the electrode arrangement, and a drive circuit for providing a first energizing signal to the first electrode and the electrode arrangement and a second energizing signal to the second electrode and the electrode arrangement. A method for manufacturing an OLED array is provided.

Claims

9-1. The method of claim 9, wherein the step of forming the first central electrode comprises forming a first anode and wherein the step of forming the second central electrode comprises the step of forming a second anode.

10-2. The method of claim 1 wherein the step of forming the first emissive layer and the step of forming the second emissive layer comprises the step of forming an emissive layer which emits blue light.

14. A method of fabricating an organic light emitting diode (OLED) apparatus comprising the steps of:

forming a first electrode having a first polarity;

forming an electrode arrangement spaced from the first electrode and having a second polarity;

forming a first organic emissive layer between the first electrode and the electrode arrangement;

forming a second electrode spaced apart from the electrode arrangement in a direction opposite the first electrode, the second electrode having the first polarity;

forming a second organic emissive layer between the second electrode and the electrode arrangement; and

forming a drive circuit for providing a first energizing signal to the first electrode and the electrode arrangement and a second energizing signal to the second electrode and the electrode arrangement.

15. The method of claim 14, wherein:

the step of forming the first electrode comprises the step of forming a first anode for the first organic emissive layer;

wherein the step of forming the electrode arrangement comprises the step of forming a common cathode for the first organic emissive layer and the second organic emissive layer; and

wherein the step of forming the second electrode comprises the step of forming a second anode for the second organic emissive layer.

16. The method of claim 14, wherein:

the step of forming the first electrode comprises the step of forming a first cathode for the first organic emissive layer;

wherein the step of forming the electrode arrangement comprises the step of forming a common anode for the first organic emissive layer and the second organic emissive layer; and

wherein the step of forming the second electrode comprises the step of forming a second cathode for the second organic emissive layer.

17. The method of claim 14, wherein the step of forming an electrode arrangement comprises the step of forming a first interior electrode and a second interior electrode, the step of associating the first interior electrode with the first organic emissive layer and the step of associating the second interior electrode with the second organic emissive layer.

18. The method of claim 17 wherein:

the step of forming the first electrode comprises the step of forming a first anode for the first organic emissive layer;

the step of forming the first interior electrode comprises forming a first cathode for the first organic emissive layer;

the step of forming the second interior electrode comprises forming a second cathode for the second organic emissive layer; and

wherein the step of forming the second electrode comprises the step of forming a second anode for the second organic emissive layer.

19. The method of claim 17 wherein:

the step of forming the first electrode comprises the step of forming a first cathode for the first organic emissive layer;

the step of forming the first interior electrode comprises forming a first anode for the first organic emissive layer;

the step of forming the second interior electrode comprises forming a second anode for the second organic emissive layer; and

wherein the step of forming the second electrode comprises the step of forming a second cathode for the second organic emissive layer.

20. A method for independently driving a stack including a first organic light emitting diode (OLED) having first and second electrodes, and second organic light emitting diode (OLED) having first and second electrodes, wherein one of said OLEDs is inverted relative to the other, and wherein the OLEDs share a common first electrode, the method comprising the steps of:

generating a first drive signal and a second drive signal independent of each other;

applying the first drive signal between the common first electrode and the second electrode of the first OLED; and

applying the second drive signal between the common first electrode and the second electrode of the second OLED.

21. The method of claim 20 wherein the common first electrode comprises a first electrode associated with the first OLED and a first electrode associated with the second OLED, and wherein the step of applying the first drive signal comprises the step of applying the first drive signal between the first electrode associated with the first OLED and the second electrode of the first OLED;

and wherein the step of applying the second drive signal comprises the step of applying the second drive signal between the first electrode associated with the second OLED and the second electrode of the second OLED.

22. The method of claim 21 further comprising forming an insulating layer between the first electrode associated with the first OLED and the first electrode associated with the second OLED.

23. The method of claim 20 for use with a drive circuit for generating first and second drive signals, the method further comprising the step of controlling the drive circuit to generate independent first and second drive signals.