Encapsulated arrays of electronic switching devices

Patent metadata

Field	Value
Publication number	US-9460976-B2
Application number	US-201214004077-A
Country	US
Kind code	B2
Filing date	Mar 16, 2012
Priority date	Mar 17, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

An electronic switching device array encapsulated in an encapsulating structure; wherein said array is exposed to one or more gas pockets between said array and said encapsulating structure.

First claim

The invention claimed is:

1. An apparatus, comprising:
a stack of layers defining one or more electronic switching devices, and
a frontplane including liquid crystal or electrophoretic display media,
wherein said stack of layers is exposed to oxygen and protected against migration of moisture from an external environment, said stack of layers is encapsulated in an encapsulating structure, and is exposed to one or more gas pockets between said stack of layers and said encapsulating structure, and said frontplane is on a side of the stack of layers opposite to the gas pockets.

2. The apparatus according to claim 1 , wherein said stack of layers is exposed to said one or more gas pockets via a substrate supporting the stack of layers.

3. The apparatus according to claim 1 , wherein said encapsulating structure includes a support structure and a gasket sandwiched between a lower surface of at least a periphery portion of the substrate and at least a periphery portion of an upper surface of the support structure, and said one or more gas pockets are defined by said gasket, a central portion of the substrate and a central portion of the support structure.

4. The apparatus according to claim 3 , wherein one or more of said support structure and gasket define one or more inlets to said one or more gas pockets exhibiting a higher transmission for oxygen gas than for moisture.

5. The apparatus according to claim 4 , wherein at least one of said one or more inlets is defined at one or more interfaces between the gasket and the support structure and/or between the gasket and the substrate.

6. The apparatus according to claim 3 , wherein said gasket comprises a spacer and layers of adhesive for adhering the spacer to a surface of the plastic substrate and a surface of the support structure.

7. The apparatus according to claim 3 , wherein said support structure comprises a metal support structure.

8. The apparatus according to claim 1 , wherein the stack of layers defines an electronic switching device array, and wherein the frontplane is mounted above the array and operable via the array.

9. The apparatus according to claim 1 , wherein the stack of layers defines an active matrix for independently controlling the electric potential at each of an array of pixel electrodes.

10. The apparatus according to claim 1 , wherein said one or more gas pocket are one or more air pockets.

11. The apparatus according to claim 9 , wherein said one or more gas pockets project onto the array an area substantially no less than the footprint of the array.

12. The apparatus according to claim 9 wherein said one or more gas pockets define a respective volume of air for each pixel of a display device of at least 1.4 milliliters.

13. The apparatus according to claim 1 , wherein the stack of layers defining said one or more electronic switching devices comprises an organic semiconductor layer.

Assignees

• Garden Daniel
• Jongman Jan
• Lewis Martin
• Flexenable Ltd

Inventors

• Garden Daniel
• Jongman Jan
• Lewis Martin

Classifications

• H10W76/60

  Seals · CPC title

• H10W76/48

  Fillings including materials for absorbing or reacting with moisture or other undesired substances · CPC title

• H10W74/01

  Manufacture or treatment · CPC title

• H10K59/12 Primary

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/874

  including getter material or desiccant · CPC title