DISPLAY DEVICE HAVING IMPROVED LUMINANCE BY REFLECTING LEAKED LIGHT

• US 20090174320A1
• Filed: 12/15/2008
• Published: 07/09/2009
• Est. Priority Date: 01/08/2008
• Status: Abandoned Application

• Current Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: KIM, Keum-Nam
• Application Number:
  US12/334,884
• Publication Number:
  US 20090174320A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: H10K 59/878 comprising reflective means

Abstract

A display device includes a substrate, a first layer on the substrate, organic light emitting elements on the substrate, and a condensing member. The condensing member is formed on the first layer and disposed between the organic light emitting elements. The condensing member condenses light emitted from the organic light emitting element in a light emitting direction of the display device.

Claims

1. A display device comprising:

a substrate;

a first layer on the substrate;

organic light emitting elements on the substrate; and

a condensing member formed on the first layer and disposed between the organic light emitting elements for condensing light emitted from the organic light emitting elements in a light emitting direction of the display device.

2. The display device of claim 1, wherein the condensing member includes:

a barrier disposed at an edge of the organic light emitting element; and

a reflective layer formed on a surface of the barrier.

3. The display device of claim 2, further comprising a thin film transistor connected to the organic light emitting element,

wherein the first layer is an insulating layer formed between the organic light emitting element and the thin film transistor, and

the barrier protrudes from the insulating layer.

4. The display device of claim 3, wherein the barrier is made of the same material as the insulating layer.

5. The display device of claim 2, wherein the barrier is disposed to surround the organic light emitting element.

6. The display device of claim 2, wherein the organic light emitting element includes a first pixel electrode, an organic emission layer, and a second pixel electrode, and the reflective layer is elongated from the first pixel electrode.

7. The display device of claim 6, wherein the reflective layer is made of the same material as the first pixel electrode.

8. The display device of claim 6, wherein the first pixel electrode includes one selected from the group consisting of aluminum (Al), nickel (Ni), chromium (Cr), silver (Ag), gold (Au), an aluminum alloy (Al-alloy), a silver alloy (Ag-alloy), and a gold alloy (Au-alloy), and the second pixel electrode is transparent.

9. The display device of claim 8, wherein the second pixel electrode includes one selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), and MgAg.

10. The display device of claim 2, further comprising thin film transistors connected to the organic light emitting elements and a pixel defining layer formed on the first layer, wherein the pixel defining layer has first openings where the organic light emitting elements are disposed,

wherein the first layer is an insulating layer formed between the organic light emitting elements and the thin film transistors, and the barrier is formed as the pixel defining layer.

11. The display device of claim 10, wherein a channel is formed at the pixel defining layer between the organic light emitting elements.

12. The display device of claim 11, wherein the channel is formed by a second opening where the reflective layer is disposed.

13. The display device of claim 2, wherein the organic light emitting element includes a first pixel electrode, an organic emission layer, and a second pixel electrode, and the reflective layer is elongated from the second pixel electrode.

14. The display device of claim 13, wherein the reflective layer is disposed in the channel.

15. The display device of claim 14, wherein the reflective layer is made of the same material as the second pixel electrode.

16. The display device of claim 15, wherein the first pixel electrode is transparent, and the second pixel electrode includes one selected from the group consisting of aluminum (Al), nickel (Ni), chromium (Cr), silver (Ag), gold (Au), an aluminum alloy (Al-alloy), a silver alloy (Ag-alloy), and a gold alloy (Au-alloy).

17. The display device of claim 16, wherein the first pixel electrode includes one selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), and MgAg.

18. A display device comprising:

a substrate;

organic light emitting elements formed on the substrate;

a first layer formed on the organic light emitting elements;

thin film transistors formed on the first layer and electrically coupled to the organic light emitting elements via holes formed on the first layer; and

a condensing member disposed between the organic light emitting elements condensing light emitted from the organic light emitting elements in a light emitting direction of the display device.

19. The display device according to claim 18, wherein the condensing member includes a barrier formed on the first layer, and a reflective layer formed on sides of the barrier.

20. The display device according to claim 18, wherein the barrier is a lattice-type barrier rib and is formed on edges of the organic light emitting elements.

21. The display device according to claim 18, wherein the organic light emitting elements include a first pixel electrode, an organic emission layer and a second pixel electrode.

22. The display device according to claim 19, wherein the reflective layer includes one selected from aluminum (Al), an aluminum alloy (Al-alloy), silver (Ag), a silver alloy (Ag-alloy), gold (Au), and a gold alloy (Au-alloy).