Flexible organic light emitting display

Patent metadata

Field	Value
Publication number	US-9705106-B2
Application number	US-201514830475-A
Country	US
Kind code	B2
Filing date	Aug 19, 2015
Priority date	Nov 28, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A flexible organic light emitting display and a method of fabricating the same are disclosed in which flexible organic light emitting display may be realized without a plastic based substrate, and at the same time an ideal WVTR characteristic level for stably driving an organic light emitting element without deterioration may be realized. The flexible organic light emitting display comprises a first ultra-thin film glass substrate that includes aluminum silicide; a thin film transistor (TFT) device arranged on the first ultra-thin film glass substrate; and an organic light emitting element arranged on the TFT element.

First claim

What is claimed is:

1. A flexible organic light emitting display comprising:
a first ultra-thin film glass substrate including aluminum silicide;
a thin film transistor (TFT) element on the first ultra-thin film glass substrate; and
an organic light emitting element on the TFT element,
wherein the aluminum silicide of the first ultra-thin film substrate has a higher concentration in an area of the first ultra-thin film glass substrate farther away from the TFT element than in any other area.

2. The flexible organic light emitting display of claim 1 , further comprising an aluminum based inorganic layer below the first ultra-thin film glass substrate and directly in contact with the first ultra-thin film glass substrate.

3. The flexible organic light emitting display of claim 2 , wherein the aluminum based inorganic layer includes aluminum oxide.

4. The flexible organic light emitting display of claim 2 , further comprising:
a first adhesive layer arranged below the first ultra-thin film glass substrate; and
a plastic protective film below the first adhesive layer.

5. The flexible organic light emitting display of claim 4 , wherein a sum of a thickness of the first adhesive layer and a thickness of the plastic protective film is greater than a thickness of the first ultra-thin film glass substrate.

6. The flexible organic light emitting display of claim 5 , wherein the plastic protective film has an area wider than that of the first ultra-thin film glass substrate.

7. The flexible organic light emitting display of claim 5 , further comprising a UV hardening sealant on a corner of the plastic protective film, so as to be directly in contact with all sides of the first ultra-thin film glass substrate.

8. The flexible organic light emitting display of claim 5 , wherein the first ultra-thin film glass substrate is capable of being bent within a maximum curvature radius range of 3 mm with the first ultra-thin film glass substrate bonded to the first adhesive layer and to the plastic protective film.

9. The flexible organic light emitting display of claim 1 , further comprising:
at least one second adhesive layer on the first ultra-thin film glass substrate; and
at least one second ultra-thin film glass substrate.

10. The flexible organic light emitting display of claim 9 , wherein the second ultra-thin film glass substrate includes aluminum silicide of which concentration is equal to 0, or is greater than 0 and lower than a concentration of aluminum silicide included in the first ultra-thin film glass substrate.

11. The flexible organic light emitting display of claim 1 , further comprising:
a third adhesive layer on the organic light emitting element; and
a third ultra-thin film glass substrate on the third adhesive layer.

12. The flexible organic light emitting display of claim 11 , wherein the third ultra-thin film glass substrate includes aluminum silicide of which concentration is higher in an area relatively far away from the TFT element than in any other area.

13. The flexible organic light emitting display of claim 12 , further comprising:
at least one second adhesive layer; and
at least one second ultra-thin film glass substrate between the organic light emitting element and the third ultra-thin film glass substrate.

14. The flexible organic light emitting display of claim 13 , wherein the second ultra-thin film glass substrate includes aluminum silicide of which concentration is equal to 0, or is greater than 0 and lower than a concentration of aluminum silicide included in the third ultra-thin film glass substrate.

15. The flexible organic light emitting display of claim 1 , wherein the TFT element includes a driving TFT, a switching TFT, a capacitor, a conductive line patterned by being connected to the driving TFT and the switching TFT, and an inorganic insulating layer between the first ultra-thin film glass substrate and the conductive line, and the inorganic insulating layer is patterned at the same pattern as that of the conductive line.

16. An apparatus comprising:
a substrate comprising at least one ultra-thin film glass layer having a thickness of approximately 40 μm; and
a protective film attached to said substrate via an adhesive layer,
wherein said substrate, said adhesive layer and said protective film all attached together exhibit a maximum curvature radius range of 3 mm and configured to exhibit particular encapsulation characteristics based on specific water vapor transmission rate (WVTR) values without requiring any multi-buffer or barrier layer attached to said substrate.

17. The apparatus of claim 16 wherein said ultra-thin film glass layer includes aluminum silicide, whereby said aluminum silicide has increased concentration towards a lower surface thereof.

18. The apparatus of claim 17 , wherein said ultra-thin film glass layer is part of a flexible organic light emitting display.

Assignees

• Lg Display Co Ltd

Inventors

• Son Hae Joon
• Ryu Joung Ho
• Choi Sie Hyug

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H01L51/003

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic