Organic light emitting diode display

Patent metadata

Field	Value
Publication number	US-9577220-B2
Application number	US-201514755028-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jan 15, 2015
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An organic light emitting diode display includes a substrate including at least one folding part, two or more emission units parallel to each other and on a same surface of the substrate in an unfolded state of the substrate, the two or more emission units overlapping each other in a folded state of the substrate, and a moisture absorbent on an inner surface of the folding part.

First claim

What is claimed is:

1. An organic light emitting diode display, comprising:
a substrate including at least one folding part;
two or more emission units parallel to each other and on a same surface of the substrate in an unfolded state of the substrate, the two or more emission units overlapping each other in a folded state of the substrate; and
a moisture absorbent on an inner surface of the folding part, the moisture absorbent being positioned between the two or more emission units in the unfolded state of the substrate.

2. The organic light emitting diode display as claimed in claim 1 , wherein the moisture absorbent includes at least two moisture absorbents.

3. The organic light emitting diode display as claimed in claim 1 , wherein the two or more emission units include a plurality of pixels, the plurality of pixels being arranged to be offset from each other in a surface direction of the substrate in the folded state of the substrate.

4. The organic light emitting diode display as claimed in claim 3 , wherein a first emission unit of the two or more emission units is a bottom emission type, and at least a second emission unit of the two or more emission units is a top emission type.

5. The organic light emitting diode display as claimed in claim 1 , wherein the moisture absorbent is on a same surface as the two or more emission units in the unfolded state of the substrate.

6. The organic light emitting diode display as claimed in claim 1 , wherein the moisture absorbent does not overlap tops of the two or more emission units in the folded state of the substrate.

7. The organic light emitting diode display as claimed in claim 1 , wherein an overlap area of the two or more emission units defines a display area, the moisture absorbent being external with respect to the display area.

8. The organic light emitting diode display as claimed in claim 1 , wherein the moisture absorbent is horizontally spaced apart from each of the two or more emission units in the folded state of the substrate.

9. An organic light emitting diode display, comprising:
a substrate including a first area and a second area connected to each other by a folding part;
a first emission unit in the first area and including first pixels;
a second emission unit in the second area and including second pixels, the second area facing the first emission unit in a folded state of the substrate;
a moisture absorbent on an inner surface of the folding part; and
a sealant to seal the first emission unit and the second emission unit, wherein the first pixels and the second pixels are offset from each other in a surface direction of the substrate in the folded state of the substrate,
wherein each of the first pixels and the second pixels includes a plurality of pixels arranged at a first pitch, and
wherein a pixel pitch of a display surface of the first pixels and the second pixels in the folded state of the substrate is smaller than the first pitch.

10. The organic light emitting diode display as claimed in claim 9 , wherein:
the plurality of pixels includes a red pixel, a green pixel, and a blue pixel.

11. The organic light emitting diode display as claimed in claim 10 , wherein an arrangement order of the first pixels in one direction of the display surface in an unfolded state of the substrate is different from an arrangement order of the second pixels.

12. The organic light emitting diode display as claimed in claim 10 , wherein:
each of the first pixels includes a transparent first pixel electrode, a first emission layer, and a metal first common electrode, and
in the first emission unit, the first common electrode includes a plurality of electrode units and a wiring unit for connecting the plurality of electrode units.

13. The organic light emitting diode display as claimed in claim 12 , wherein each of the second pixels includes a metal second pixel electrode, a second emission layer, and a transparent second common electrode.

14. The organic light emitting diode display as claimed in claim 9 , wherein the moisture absorbent includes at least two moisture absorbents.

15. An organic light emitting diode display, comprising:
a substrate including a third area, a fourth area connected to a first side of the third area by a first folding part, and a fifth area connected to a second side of the third area by a second folding part;
a third emission unit in the third area and including third pixels;
a fourth emission unit in the fourth area and including fourth pixels;
a fifth emission unit in the fifth area and including fifth pixels;
moisture absorbents on internal surfaces of the first folding part and the second folding part; and
a sealant to seal the third to fifth emission units,
wherein the third emission unit, the fourth emission unit, and the fifth emission unit overlap each other in a folded state of the substrate, and the third pixels, the fourth pixels, and the fifth pixels are offset from each other in a surface direction of the substrate in a folded state of the substrate, and
wherein each of the moisture absorbents is outside an overlap area of the third through fifth emission units.

16. The organic light emitting diode display as claimed in claim 15 , wherein each of the third pixels, the fourth pixels, and the fifth pixels includes a red pixel, a green pixel, and a blue pixel.

17. The organic light emitting diode display as claimed in claim 16 , wherein:
each of the third pixels, the fourth pixels, and the fifth pixels includes an emission layer of a single color arranged at a second pitch, and
a pixel pitch of a display surface defined by the third pixels, the fourth pixels, and the fifth pixels is ⅓ of the second pitch.

18. The organic light emitting diode display as claimed in claim 17 , wherein:
each of the third pixels includes a transparent third pixel electrode, a third emission layer, and a metal third common electrode, and
in the third emission unit, the metal third common electrode includes a plurality of electrode units and a wiring unit for connecting the plurality of electrode units.

19. The organic light emitting diode display as claimed in claim 18 , wherein:
each of the fourth pixels includes a metal fourth pixel electrode, a fourth emission layer, and a transparent fourth common electrode, and
each of the fifth pixels includes a metal fifth pixel electrode, a fifth emission layer, and a transparent fifth common electrode.

20. The organic light emitting diode display as claimed in claim 15 , wherein the moisture absorbents include at least two moisture absorbents at each side of two opposite sides of the overlap area of the third through fifth emission units.

Assignees

• Samsung Display Co Ltd

Inventors

• Naijo Tsuyoshi

Classifications

• H10K59/874 Primary

  including getter material or desiccant · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K50/846

  comprising getter material or desiccants · CPC title

• H10K59/128 Primary

  comprising two independent displays, e.g. for emitting information from two major sides of the display · CPC title

• H01L51/0097

  Electricity · mapped topic