Organic light emitting display and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-10505142-B2
Application number	US-201715637728-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jun 30, 2016
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

An organic light emitting display can include a plurality of light emitting elements disposed on a substrate; an encapsulation unit disposed on the plurality of light emitting elements and including a plurality of inorganic encapsulation layers and at least one organic encapsulation layer disposed between the plurality of inorganic encapsulation layers; and a plurality of touch sensing lines and a plurality of touch driving lines intersecting each other, in which at least one of the plurality of inorganic encapsulation layers or the at least one organic encapsulation layer is disposed between the plurality of touch sensing lines and the plurality of touch driving lines at locations where the plurality of touch sensing lines cross the plurality of touch driving lines.

First claim

What is claimed is:

1. An organic light emitting display comprising:
a plurality of light emitting elements disposed on a substrate;
an encapsulation unit disposed on the plurality of light emitting elements and including a plurality of inorganic encapsulation layers and at least one organic encapsulation layer disposed between the plurality of inorganic encapsulation layers;
a plurality of touch sensing lines and a plurality of touch driving lines intersecting each other, at least one of the plurality of touch sensing lines or at least one of the plurality of touch driving lines being disposed on at least one of the plurality of inorganic encapsulation layers or the at least one organic encapsulation layer;
a plurality of routing lines respectively connected to the plurality of touch driving lines and the plurality of touch sensing lines;
a plurality of routing pads respectively connected to the plurality of routing lines;
a plurality of touch pad electrodes disposed outside at least one of the plurality of inorganic encapsulation layers or the at least one organic encapsulation layer of the encapsulation unit; and
a plurality of pad connection electrodes conductively connecting the plurality of routing pads to the plurality of touch pad electrodes,
wherein at least a portion of the plurality of pad connection electrodes is disposed between a side surface of the encapsulation unit and the plurality of touch pad electrodes.

2. The organic light emitting display according to claim 1 , further comprising:
wherein the plurality of pad connection electrodes are disposed on a side surface and an upper surface of an uppermost inorganic encapsulation layer among the plurality of inorganic encapsulation layers within the encapsulation unit.

3. The organic light emitting display according to claim 1 , further comprising:
wherein the plurality of routing lines are disposed on a side surface and an upper surface of at least one of the plurality of inorganic encapsulation layers or the at least one organic encapsulation layer and between an uppermost inorganic encapsulation layer among the plurality of inorganic encapsulation layers within the encapsulation unit and the at least one of the plurality of inorganic encapsulation layers or the at least one organic encapsulation layer.

4. The organic light emitting display according to claim 1 , wherein the encapsulation unit includes:
a first inorganic encapsulation layer;
an organic encapsulation layer disposed on the first inorganic encapsulation layer; and
a second inorganic encapsulation layer disposed on the organic encapsulation layer,
wherein the organic encapsulation layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer, and
wherein the first inorganic encapsulation layer is closer to the plurality of light emitting elements than the organic encapsulation layer and the second inorganic encapsulation layer.

5. The organic light emitting display according to claim 4 , further comprising an interlayer inorganic layer disposed between the plurality of light emitting elements and the first inorganic encapsulation layer,
wherein one of the plurality of touch driving lines and the plurality of touch sensing lines is disposed on the interlayer inorganic layer, and
wherein a remaining one of the plurality of touch driving lines and the plurality of touch sensing lines, other than the one of the plurality of touch driving lines and the plurality of touch sensing lines, is disposed on the first inorganic encapsulation layer.

6. The organic light emitting display according to claim 4 , wherein the second inorganic encapsulation layer covers an upper surface and a side surface of the organic encapsulation layer and an upper surface and a side surface of the first inorganic encapsulation layer.

7. The organic light emitting display according to claim 1 , wherein each the plurality of touch driving lines includes:
a plurality of first touch electrodes arranged in a first direction; and
a plurality of first bridges configured to connect the plurality of first touch electrodes,
wherein each of the plurality of touch sensing lines includes:
a plurality of second touch electrodes arranged in a second direction intersecting the first direction; and
a plurality of second bridges configured to connect the plurality of second touch electrodes,
wherein the encapsulation unit includes:
a first inorganic encapsulation layer;
an organic encapsulation layer disposed on the first inorganic encapsulation layer; and
a second inorganic encapsulation layer disposed on the organic encapsulation layer,

wherein the organic encapsulation layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer, and
wherein the first inorganic encapsulation layer is closer to the plurality of light emitting elements than the organic encapsulation layer and the second inorganic encapsulation layer.

8. The organic light emitting display according to claim 7 , wherein the plurality of first touch electrodes, the plurality of second touch electrodes and the plurality of second bridges are disposed on the second inorganic encapsulation layer,
wherein the plurality of first bridges are disposed on the organic encapsulation layer, and
wherein the plurality of first touch electrodes are connected to the plurality of first bridges through touch contact holes in the second inorganic encapsulation layer.

9. The organic light emitting display according to claim 7 , wherein the plurality of first electrodes, the plurality of second touch electrodes and the plurality of second bridges are disposed on the organic encapsulation layer,
wherein the plurality of first bridges are disposed on the first inorganic encapsulation layer, and
wherein the plurality of first touch electrodes are connected to the plurality of first bridges through touch contact holes in the organic encapsulation layer.

10. The organic light emitting display according to claim 7 , further comprising an interlayer inorganic layer disposed between the plurality of light emitting elements and the first inorganic encapsulation layer,
wherein the plurality of first electrodes, the plurality of second touch electrodes and the plurality of second bridges are disposed on the first inorganic encapsulation layer,
wherein the plurality of first bridges are disposed on the interlayer inorganic layer, and
wherein the plurality of first touch electrodes are connected to the plurality of first bridges through touch contact holes in the first inorganic encapsulation layer.

11. The organic light emitting display according to claim 8 , further comprising a bank configured to provide an emission region for an organic light emitting layer of a light emitting element among the plurality of light emitting elements, and
wherein the plurality of first bridges and the plurality of second bridges overlap with the bank.

12. The organic light emitting display according to claim 11 , wherein the plurality of first bridges and the plurality of second bridges overlap with the bank without overlapping with any of the plurality of light emitting elements.

13. The organic light emitting display according to claim 1 , wherein the plurality of touch sensing lines and the plurality of touch driving lines are both disposed on an upper surface of the encapsulation unit, and
wherein the encapsulation unit is disposed between the plurality of light emitting elements, and the plurality of touch sensing lines and the plurality of touch driving lines.

14. The organic light em

Assignees

• Lg Display Co Ltd

Inventors

• Oh Jae-Young

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• H01L27/3276

  Electricity · mapped topic

• H01L51/5206

  Electricity · mapped topic

• H01L51/5008

  Electricity · mapped topic