ORGANIC LIGHT EMITTING DIODE DISPLAY

• US 20140145161A1
• Filed: 10/29/2013
• Published: 05/29/2014
• Est. Priority Date: 11/23/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: NAIJO, Tsuyoshi
• Granted Patent: US 9,171,890 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/128 comprising two independent displays, e.g. for emitting information from two major sides of the display
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An organic light emitting diode display includes a substrate having three folded portions overlapping each other, and a first light emitting unit, a second light emitting unit, and a third light emitting unit on respective ones of the three folded portions of the substrate, the first through third light emitting units overlapping each other and emitting different colors, wherein the first through third light emitting units are on a same surface of the substrate, when the substrate is unfolded to have the three folded portions substantially planar.

Claims

1. An organic light emitting diode display, comprising:

a substrate having three folded portions overlapping each other; and

a first light emitting unit, a second light emitting unit, and a third light emitting unit on respective ones of the three folded portions of the substrate, the first through third light emitting units overlapping each other and emitting different colors,

wherein the first through third light emitting units are on a same surface of the substrate, when the substrate is unfolded to have the three folded portions substantially planar.

2. The organic light emitting diode display of claim 1, wherein:

a part of an outer side of the substrate defines a display side,

the first light emitting unit includes a first pixel,

the second light emitting unit includes a second pixel spaced apart from the first pixel in a first direction of the display side, and

the third light emitting unit includes a third pixel spaced apart from the first pixel and the second pixel in the first direction of the display side.

3. The organic light emitting diode display of claim 2, wherein each of the first pixel, the second pixel, and the third pixel is a red pixel, a green pixel, or a blue pixel, the first through third pixels being three different colors.

4. The organic light emitting diode display of claim 3, wherein, in an unfolded state of the substrate, the first light emitting unit is configured as a bottom emission type, and the second light emitting unit and the third light emitting unit are configured as top emission types.

5. The organic light emitting diode display of claim 3, wherein, in an unfolded state of the substrate, the first light emitting unit is configured as a top emission type, and the second light emitting unit and the third light emitting unit are configured as bottom emission types.

6. An organic light emitting diode display, comprising:

a substrate including a first area, a second area, and a third area, the first area being between the second and third areas in an unfolded state of the substrate;

a first light emitting unit in the first area and including a first pixel;

a second light emitting unit in the second area and including a second pixel; and

a third light emitting unit in the third area and including a third pixel,

wherein, in a folded state of the substrate, the first through third areas overlap each other, and the first through third light emitting units overlap each other.

7. The organic light emitting diode display of claim 6, wherein the substrate includes a display side corresponding to any one area of the first area, the second area, and the third area, the first pixel, the second pixel, and the third pixel being spaced apart from each other in one direction of the display side.

8. The organic light emitting diode display of claim 7, wherein the first pixel includes a first transparent pixel electrode, a first organic emission layer on the first pixel electrode, and a first reflective common electrode on the first organic emission layer.

9. The organic light emitting diode display of claim 8, wherein the first common electrode includes a plurality of electrode parts positioned with predetermined distances therebetween and a wiring part connecting the plurality of electrode parts, each of the plurality of electrode parts corresponding to the first organic emission layer.

10. The organic light emitting diode display of claim 8, wherein:

the second pixel includes a second reflective pixel electrode, a second organic emission layer on the second pixel electrode, and a second transparent common electrode on the second organic emission layer, and

the third pixel includes a third reflective pixel electrode, a third organic emission layer on the third pixel electrode, and a third transparent common electrode on the third organic emission layer.

11. The organic light emitting diode display of claim 10, wherein:

the second common electrode and the third common electrode are covered by the transparent buffer layer, and

an organic material layer including a hole injection layer, a hole transport layer, and an electron transport layer is positioned in the first light emitting unit, the second light emitting unit, and the third light emitting unit.

12. The organic light emitting diode display of claim 11, wherein:

the first pixel, the second pixel, and the third pixel are included in plural, and

the organic material layer defines openings between the first pixels, between the second pixels, and between the third pixels.

13. The organic light emitting diode display of claim 7, wherein the first pixel includes a first reflective pixel electrode, a first organic emission layer on the first pixel electrode, and a first transparent common electrode on the first organic emission layer.

14. The organic light emitting diode display of claim 13, wherein:

the second pixel includes a second transparent pixel electrode, a second organic emission layer on the second pixel electrode, and a second reflective common electrode on the second organic emission layer, and

the third pixel includes a third transparent pixel electrode, a third organic emission layer on the third pixel electrode, and a third reflective common electrode on the third organic emission layer.

15. The organic light emitting diode display of claim 14, wherein:

the second common electrode and the third common electrode include a plurality of electrode parts positioned with predetermined distances therebetween and wiring parts connecting the plurality of electrode parts, and

each of the plurality of electrode parts corresponds to the second organic emission layer or the third organic emission layer.

16. The organic light emitting diode display of claim 14, wherein:

the second common electrode and the third common electrode are covered by a transparent buffer layer, and

an organic material layer including a hole injection layer, a hole transport layer, and an electron transport layer is positioned in the first light emitting unit, the second light emitting unit, and the third light emitting unit.

17. The organic light emitting diode display of claim 16, wherein:

the first pixel, the second pixel, and the third pixel are included in plural, and

the organic material layer defines openings between the first pixels, between the second pixels, and between the third pixels.

18. The organic light emitting diode display of claim 6, further comprising:

a first sealant along one end of the folded substrate to seal the first light emitting unit and the second light emitting unit; and

a second sealant along an opposite end of the folded substrate to seal the third light emitting unit.