Touch sensible organic light emitting device

Patent metadata

Field	Value
Publication number	US-9690423-B2
Application number	US-201615071137-A
Country	US
Kind code	B2
Filing date	Mar 15, 2016
Priority date	Nov 28, 2008
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Embodiments of the present invention generally relate to a touch sensible organic light emitting device. The organic light emitting device according to an exemplary embodiment of the present invention comprises: a substrate; a thin film transistor disposed on the substrate; an organic light emitting element connected to the thin film transistor and receiving a data voltage; a plurality of encapsulation thin films disposed on the organic light emitting element, and encapsulating the thin film transistor and the organic light emitting element; a planarization layer disposed on the encapsulation thin film; and a touch sensor disposed on the planarization layer.

First claim

What is claimed is:

1. An organic light emitting device comprising:
a substrate;
a thin film transistor on a first surface of the substrate;
a pixel electrode electrically connected to the thin film transistor;
a partition defining an opening on the pixel electrode;
an organic light emitting layer including a portion disposed in the opening;
a common electrode on the organic light emitting layer;
at least two layers disposed on the common electrode and including at least one inorganic layer, wherein the at least two layer include a first portion and a second portion that have same layers as each other, the first portion overlaps both the opening and the organic light emitting layer in a first direction perpendicular to the first surface of the substrate, and the second portion overlaps the partition in the first direction;
an organic layer on the at least two layers, wherein the organic layer includes a third portion and a fourth portion, the third portion overlaps the first portion in the first direction, and the fourth portion overlaps the second portion in the first direction; and
a touch sensor on the organic layer,
wherein
a maximum distance between an upper surface of the first portion and the first surface of the substrate is less than a maximum distance between an upper surface of the second portion and the first surface of the substrate, and
a maximum thickness of the third portion of the organic layer is greater than a maximum thickness of the fourth portion of the organic layer.

2. The organic light emitting device of claim 1 , wherein the at least two layers include a first layer contacting an upper surface of the common electrode.

3. The organic light emitting device of claim 2 , wherein the at least one inorganic layer is between the first layer and the organic layer.

4. The organic light emitting device of claim 3 , wherein the first layer comprises an organic material.

5. The organic light emitting device of claim 3 , wherein a maximum distance between the first surface of the substrate and an upper surface of the first layer corresponding to the first portion is less than a maximum distance between the first surface of the substrate and an upper surface of the first layer corresponding to the second portion.

6. The organic light emitting device of claim 1 , wherein the second portion further overlaps the pixel electrode and the common electrode in the first direction.

7. The organic light emitting device of claim 1 , wherein the organic layer is interposed between the at least two layers and the touch sensor.

8. The organic light emitting device of claim 7 , wherein the touch sensor comprises a first touch conductor.

9. The organic light emitting device of claim 8 , wherein the touch sensor further comprises a second touch conductor on the organic layer.

10. The organic light emitting device of claim 9 , further comprising a first insulating layer on the organic layer.

11. The organic light emitting device of claim 10 , wherein the first insulating layer includes a portion between the first touch conductor and the second touch conductor.

12. The organic light emitting device of claim 11 , further comprising a second insulating layer on the second touch conductor.

13. The organic light emitting device of claim 11 , wherein both the first touch conductor and the second touch conductor contact the first insulating layer.

14. The organic light emitting device of claim 9 , wherein
one of the first touch conductor and the second touch conductor is configured to receive a first signal, and the other one of the first touch conductor and the second touch conductor is configured to output a second signal.

15. The organic light emitting device of claim 1 , wherein the common electrode comprises a transparent conductive material.

16. The organic light emitting device of claim 15 , wherein
the pixel electrode, the organic light emitting layer, and the common electrode together form an organic light emitting element, and
the organic light emitting element emits light toward the touch sensor.

17. The organic light emitting device of 1 , wherein a thickness of the third portion of the organic layer in the first direction is greater than a total thickness of the at least two layers in the first direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ki
• Min Hoon-Kee

Classifications

• H10K50/844

  Encapsulations · CPC title

• H01L51/5253

  Electricity · mapped topic

• H01L27/3248

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• G06F3/044

  by capacitive means · CPC title