Organic light emitting display apparatus

• US 8,884,515 B2
• Filed: 03/17/2009
• Issued: 11/11/2014
• Est. Priority Date: 03/18/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Chang, Seung-Wook, Kim, Hye-Dong, Kim, Mu-Hyun
• Primary Examiner(s): Hollweg, Thomas A
• Application Number:
  US12/405,502
• Publication Number:
  US 20090236981A1
• Time in Patent Office: 2,065 Days
• Field of Search: 313498-512, 313/113, 313/114, 315/169.3, 315/169.4
• US Class Current: 313/504
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/856 comprising reflective means
• 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 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

An organic light emitting display apparatus that includes a substrate, an organic light emitting unit formed on the substrate, a reflection member disposed on a non-light emitting region of the organic light emitting unit, and a sealing member that seals the organic light emitting unit. The organic light emitting display apparatus can function as a display apparatus or a mirror.

Claims

1. An organic light emitting display apparatus comprising:

a substrate;

a pixel electrode formed on the substrate;

a pixel defining layer that is formed on a surface of the pixel electrode opposite the substrate, wherein the pixel defining layer exposes a portion of the pixel electrode;

an intermediate layer having a light emitting layer formed on the pixel defining layer and the exposed portion of the pixel electrode, wherein the intermediate layer exposes a portion of the pixel defining layer;

a facing electrode formed on the pixel defining layer and the intermediate layer; and

a reflection member formed on the facing electrode to correspond to the pixel defining layer, wherein an uppermost surface of the facing electrode is at a height between the top surface and the bottom surface of the reflection member, and wherein an uppermost surface of the exposed portion of the pixel defining layer is only partially overlapped with the reflection member.

2. The organic light emitting display apparatus of claim 1, wherein the reflection member is formed of a material that reflects light proceeding towards the reflection member from outside of the organic light emitting display apparatus.

3. The organic light emitting display apparatus of claim 2, wherein the reflection member is formed of a metal that reflects light proceeding towards the reflection member from outside of the organic light emitting display apparatus.

4. The organic light emitting display apparatus of claim 3, wherein the reflection member is formed of Al.

5. The organic light emitting display apparatus of claim 4, wherein the reflection member has a thickness of 250 Å

or more.

6. The organic light emitting display apparatus of claim 2, wherein the reflection member is formed of a metal that reflects light proceeding towards the reflection member from outside of the organic light emitting display apparatus, and the metal is selected from the group consisting of Al, Cr, Fe, Pt and Hg.

7. The organic light emitting display apparatus of claim 6, wherein the reflection member is formed of Al.

8. The organic light emitting display apparatus of claim 7, wherein the reflection member has a thickness of 250 Å

or more and a reflected percentage of visible light is 75 to 90%.

9. The organic light emitting display apparatus of claim 1, wherein the pixel electrode is a reflective electrode and the facing electrode is a transparent electrode.

10. The organic light emitting display apparatus of claim 1, further comprising a sealing member that seals the organic light emitting display apparatus, wherein the reflection member is formed on a surface of the facing electrode facing the sealing member.

11. The organic light emitting display apparatus of claim 1, wherein the intermediate layer is selected from at least one of the group consisting of a hole injection layer, a hole transport layer, an emission layer, an electron transport layer, and an electron injection layer.

12. The organic light emitting display apparatus of claim 1, wherein the pixel electrode is an anode electrode and the facing electrode is a cathode electrode.

13. The organic light emitting display apparatus of claim 1, wherein the pixel electrode is a cathode electrode and the facing electrode is an anode electrode.

14. The organic light emitting display apparatus of claim 1, wherein the apparatus has a display function and a mirror function.