Flexible organic light emitting diode display having edge bending structure

Patent metadata

Field	Value
Publication number	US-9954043-B2
Application number	US-201615385430-A
Country	US
Kind code	B2
Filing date	Dec 20, 2016
Priority date	Dec 30, 2015
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The present disclosure relates to a flexible organic light emitting diode display having an edge bending structure. The organic light emitting diode display according to an embodiment includes a flexible plate including a display area, a non-display area surrounding the display area, and an edge bending area near the display area in the non-display area; a first line disposed in the non-display area on the flexible plate; a first buffer layer covering the first line; a second line on the first buffer layer in the non-display area; a second buffer layer covering the second line; gate elements disposed on the second buffer layer; an intermediate insulating layer covering the gate elements; data elements, and a connecting electrode connecting the first line to the second line on the intermediate insulating layer; and a plurality of trenches disposed at the edge bending area and penetrating the intermediate insulating layer, the second buffer layer and the first buffer layer.

First claim

What is claimed is:

1. A flexible organic light emitting diode display device comprising:
a flexible plate including a display area, a non-display area surrounding the display area, and an edge bending area near the display area in the non-display area;
a first line disposed in the non-display area on the flexible plate;
a first buffer layer covering the first line;
a second line on the first buffer layer in the non-display area;
a second buffer layer covering the second line;
gate elements disposed on the second buffer layer;
an intermediate insulating layer covering the gate elements;
data elements, and a connecting electrode connecting the first line to the second line on the intermediate insulating layer; and
a plurality of trenches disposed at the edge bending area and penetrating the intermediate insulating layer, the second buffer layer and the first buffer layer.

2. The flexible organic light emitting diode display device according to claim 1 , further comprising:
a light shielding layer disposed at a same layer and including a same material with the first line in the display area;
a storage electrode disposed at a same layer and including a same material with the second line in the display area;
a switching thin film transistor and a driving thin film transistor connected to the switching thin film transistor on the second buffer layer in the display area; and
an organic light emitting diode connected to the driving thin film transistor.

3. The flexible organic light emitting diode display device according to claim 1 ,
wherein the gate elements includes:
a gate pad disposed in the non-display area;
a gate line extended from the gate pad over the display area; and
a gate electrode extruded from the gate line in the display area, and

wherein the data elements includes:
a data pad disposed in the non-display area;
a data line extended from the data pad over the display area;
a source electrode extruded from the data line in the display area;
a drain electrode facing with the source electrode; and
a gate pad terminal contacting the gate pad.

4. The flexible organic light emitting diode display device according to claim 3 , further comprising:
a semiconductor layer overlapping with middle portions of the gate electrode on the second buffer layer and under the gate electrode; and
a gate insulating layer covering an entire surface of the second buffer layer between the semiconductor layer and the gate electrode,
wherein the trench penetrates the intermediate insulating layer, the gate insulating layer, the second buffer layer and the first buffer layer.

5. The flexible organic light emitting diode display device according to claim 3 , further comprising:
a semiconductor layer overlapping with middle portions of the gate electrode on the second buffer layer and under the gate electrode; and
a gate insulating layer having a same shape with the gate electrode between the semiconductor layer and the gate electrode,
wherein the trench penetrates the intermediate insulating layer, the second buffer layer and the first buffer layer.

6. The flexible organic light emitting diode display device according to claim 1 , further comprising:
an organic layer directly contacting an entire surface of the flexible plate;
a multi-buffer layer directly contacting an entire surface of the organic layer; and
a gate insulating layer deposited on the multi-buffer layer,
wherein the trench exposes some of the organic layer by penetrating the intermediate insulating layer, the gate insulating layer, the second buffer layer, the first buffer layer and the multi-buffer layer.

7. The flexible organic light emitting diode display device according to claim 1 , further comprising:
an organic layer directly contacting an entire surface of the flexible plate; and
a multi-buffer layer directly contacting an entire surface of the organic layer,
wherein the trench exposes some of the organic layer by penetrating the intermediate insulating layer, the second buffer layer, the first buffer layer and the multi-buffer layer.

8. The flexible organic light emitting diode display device according to claim 1 , wherein the non-display area is disposed behind one of a lateral side and a rear side of the display area by bending the edge bending area.

Assignees

• Lg Display Co Ltd

Inventors

• Park Jaesoo
• Shin Dongchae

Classifications

• H01L2251/5338

  Electricity · mapped topic

• H01L27/3258 Primary

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic