Touch sensible organic light emitting device

Patent metadata

Field	Value
Publication number	US-9711570-B1
Application number	US-201715479090-A
Country	US
Kind code	B1
Filing date	Apr 4, 2017
Priority date	Nov 28, 2008
Publication date	Jul 18, 2017
Grant date	Jul 18, 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;
a first layer on the common electrode, wherein the first layer includes a first portion and a second portion, 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;
a second layer on the first layer, wherein the second 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 second layer,
wherein:
a maximum distance between an upper surface of the first portion of the first layer and the first surface of the substrate is less than a maximum distance between an upper surface of the second portion of the first layer and the first surface of the substrate, and
a maximum thickness of the third portion of the second layer is greater than a maximum thickness of the fourth portion of the second layer.

2. The organic light emitting device of claim 1 , wherein the second layer comprises an organic material.

3. The organic light emitting device of claim 2 , wherein the first layer contacts an upper surface of the common electrode.

4. The organic light emitting device of claim 3 , further comprising at least one inorganic layer between the first layer and the second layer.

5. The organic light emitting device of claim 2 , wherein the first layer comprises an inorganic insulating material.

6. The organic light emitting device of claim 5 , further comprising at least one layer between the common electrode and the second layer,
wherein the first layer is interposed between the at least one layer and the second layer.

7. The organic light emitting device of claim 6 , wherein the at least one layer comprises an organic material.

8. The organic light emitting device of claim 6 , wherein the second layer contacts an upper surface of the first layer.

9. The organic light emitting device of claim 6 , wherein the first layer contacts an upper surface of the at least one layer.

10. The organic light emitting device of claim 9 , wherein a maximum distance between a lower surface of the first portion of the first layer and the first surface of the substrate is less than a maximum distance between a lower surface of the second portion of the first layer and the first surface of the substrate.

11. The organic light emitting device of claim 1 , wherein:
the partition includes an overlap portion which is interposed between the pixel electrode and the common electrode, and
the second portion of the first layer overlaps the overlap portion of the partition in the first direction.

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

13. The organic light emitting device of claim 1 , wherein the second layer is interposed between the first layer and the touch sensor.

14. The organic light emitting device of claim 1 , wherein the touch sensor comprises a first touch conductor.

15. The organic light emitting device of claim 1 , wherein the touch sensor further comprises a second touch conductor on the second layer.

16. The organic light emitting device of claim 15 , further comprising a first insulating layer on the second layer.

17. The organic light emitting device of claim 16 , wherein the first insulating layer includes a portion between the first touch conductor and the second touch conductor.

18. The organic light emitting device of claim 17 , further comprising a second insulating layer on the second touch conductor.

19. The organic light emitting device of claim 17 , wherein both the first touch conductor and the second touch conductor contacts the first insulating layer.

20. The organic light emitting device of claim 15 , 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.

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

22. The organic light emitting device of claim 21 , 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.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ki
• Min Hoon-Kee

Classifications

• H10K50/844

  Encapsulations · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• H01L27/323 Primary

  Electricity · mapped topic

• G09G3/3275

  Details of drivers for data electrodes · CPC title

• G09G3/3258

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title