Flexible display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9111887-B2
Application number	US-201213588814-A
Country	US
Kind code	B2
Filing date	Aug 17, 2012
Priority date	Mar 23, 2012
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

A flexible display apparatus and a method of manufacturing the flexible display apparatus are disclosed. A flexible organic light-emitting display apparatus includes: a thin film transistor formed on a substrate in which a plurality of subpixels are located; an organic light-emitting device electrically connected to the thin film transistor and in one of the subpixels, the organic light-emitting device including a first electrode, an organic layer on the first electrode; and a second electrode on the organic layer; a pixel defining layer having an opening that exposes at least a region of the first electrode, and covering an edge region of the first electrode; a capping layer covering the organic light-emitting device; and at least one clamp unit in a non-organic layer region defined next to the one of the subpixels, wherein the non-organic layer region is a region in which the organic layer is not formed.

First claim

What is claimed is:

1. An organic light-emitting display apparatus comprising a substrate and having a plurality of subpixels on the substrate, the organic light-emitting display apparatus further comprising:
a thin film transistor on the substrate;
an organic light-emitting device electrically connected to the thin film transistor and in one of the subpixels, the organic light-emitting device comprising a first electrode, an organic layer on the first electrode, and a second electrode on the organic layer;
a pixel defining layer having an opening that exposes a region of the first electrode, and covering an edge region of the first electrode to define an emission area of the one of the subpixels;
a capping layer covering the organic light-emitting device; and
at least one clamp unit next to the emission area of the one of the subpixels, wherein the at least one clamp unit is not formed on the organic layer,
wherein a surface region of the pixel defining layer surrounds the one of the subpixels and is buried by the capping layer,
wherein a gap exposing the surface region of the pixel defining layer is between the organic layer and the at least one clamp unit, and
wherein the gap is filled with the capping layer so that the pixel defining layer and the capping layer directly contact each other.

2. The organic light-emitting display apparatus of claim 1 , wherein the at least one clamp unit is on DA the surface region of the pixel defining layer.

3. The organic light-emitting display apparatus of claim 2 , wherein the at least one clamp unit has an inverse tapered shape with a negative side slope.

4. The organic light-emitting display apparatus of claim 3 , wherein the at least one clamp unit has a cross-sectional area decreasing from a first surface toward a second surface that is vertically opposite to the first surface and contacts the pixel defining layer.

5. The organic light-emitting display apparatus of claim 3 , wherein the at least one clamp unit has a first surface, a second surface that is vertically opposite to the first surface and contacts the pixel defining layer, a widest portion between the first surface and the second surface, and a cross-sectional area decreasing from the widest portion toward the second surface.

6. The organic light-emitting display apparatus of claim 1 , wherein the capping layer is formed by atomic layer deposition.

7. The organic light-emitting display apparatus of claim 1 , wherein the capping layer is a hybrid layer of alternating organic and inorganic material layers.

8. The organic light-emitting display apparatus of claim 1 , wherein
the pixel defining layer defines the subpixels, and
the at least one clamp unit is at a corner of each of adjacent ones of the subpixels.

9. The organic light-emitting display apparatus of claim 1 , wherein
the pixel defining layer defines the subpixels, and
the at least one clamp unit is between adjacent ones of the subpixels.

10. The organic light-emitting display apparatus of claim 1 , further comprising a plurality of pixels on the substrate, each of the pixels comprising a red one of the subpixels, a green one of the subpixels, and a blue one of the subpixels, wherein
the pixel defining layer is between adjacent ones of the subpixels, and
the at least one clamp unit is between adjacent ones of the pixels.

11. An organic light-emitting display apparatus comprising a substrate and having a plurality of subpixels on the substrate, the organic light-emitting display apparatus further comprising:
a thin film transistor on the substrate;
an organic light-emitting device electrically connected to the thin film transistor and in one of the subpixels, the organic light-emitting device comprising a first electrode, an organic layer on the first electrode, and a second electrode on the organic layer;
a pixel defining layer having an opening that exposes a region of the first electrode, and covering an edge region of the first electrode to define an emission area of the one of the subpixels;
a capping layer covering the organic light-emitting device
at least one clamp unit next to the emission area of the one of the subpixels, wherein the at least one clamp unit is not formed on the organic layer; and
a protection layer under the pixel defining layer to planarize an upper surface of the thin film transistor,
wherein the at least one clamp unit is on an exposed surface region of the protection layer in which the pixel defining layer is not present,
wherein a gap exposing the surface region of the protection layer is between the pixel defining layer and the at least one clamp unit, and is filled with the capping layer so that the pixel defining layer, the capping layer, and the protection layer directly contact one another.

12. The organic light-emitting display apparatus of claim 11 , wherein the pixel defining layer and the at least one clamp unit are formed in a same layer.

13. The organic light-emitting display apparatus of claim 11 , wherein the at least one clamp unit is formed on the exposed surface region of the protection layer, and is buried by the capping layer.

14. The organic light-emitting display apparatus of claim 13 , wherein the at least one clamp unit has an inverse tapered shape with a negative side slope.

15. The organic light-emitting display apparatus of claim 14 , wherein the at least one clamp unit has a cross-sectional area decreasing from a first surface toward a second surface that is vertically opposite to the first surface and contacts the protection layer.

16. The organic light-emitting display apparatus of claim 14 , wherein the at least one clamp unit has a first surface, a second surface that is vertically opposite to the first surface and contacts the protection layer, a widest portion between the first surface and the second surface, and a cross-sectional area decreasing from the widest portion toward the second surface.

Assignees

• Kim Mu-Gyeom
• Kim Kyung-Ho
• Cho Joon-Hyuk
• Kim Sun-Ho
• Han Ji-Won
• Samsung Display Co Ltd

Inventors

• Kim Mu-Gyeom
• Kim Kyung-Ho
• Cho Joon-Hyuk
• Kim Sun-Ho
• Han Ji-Won

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• C23C16/45525

  Atomic layer deposition [ALD] · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title