Touch sensible organic light emitting device

Patent metadata

Field	Value
Publication number	US-2018138247-A1
Application number	US-201815869024-A
Country	US
Kind code	A1
Filing date	Jan 11, 2018
Priority date	Nov 28, 2008
Publication date	May 17, 2018
Grant date	—

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 over a first surface of the substrate; a pixel electrode electrically connected to the thin film transistor; a partition defining an opening over the pixel electrode; an organic light emitting layer comprising a portion in the opening; a common electrode over the organic light emitting layer; at least two layers over the common electrode, the at least two layers comprising:
a first layer contacting the common electrode, the first layer comprising an organic material; and
a second layer stacked over the first layer;
an organic layer over the at least two layers; and a touch sensor over the organic layer, wherein the at least two layers comprise:
a first portion overlapping the organic light emitting layer in a first direction perpendicular to the first surface of the substrate; and
a second portion connected to and extending from the first portion, the second portion overlapping the partition in the first direction,
wherein each of the first portion and the second portion comprises the first layer and the second layer, wherein the organic layer comprises:
a third portion overlapping the first portion in the first direction; and
a fourth portion overlapping the second portion in the first direction,
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 wherein a maximum thickness of the third portion is greater than a maximum thickness of the fourth portion.

2 . The organic light emitting device of claim 1 , wherein the at least two layers further comprises at least one inorganic layer between the first layer and the organic layer.

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

4 . The organic light emitting device of claim 1 , 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.

5 . 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.

6 . The organic light emitting device of claim 1 , wherein the touch sensor comprises a first touch conductor and a second touch conductor over the organic layer.

7 . The organic light emitting device of claim 6 , further comprising:
a first insulating layer over the organic layer, wherein the first insulating layer comprises a portion between the first touch conductor and the second touch conductor.

8 . The organic light emitting device of claim 7 , wherein each of the first touch conductor and the second touch conductor contact the first insulating layer.

9 . The organic light emitting device of claim 8 , further comprising:
second insulating layer over the second touch conductor.

10 . The organic light emitting device of claim 6 , 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.

11 . The organic light emitting device of claim 1 , wherein:
the common electrode comprises a transparent conductive material; the pixel electrode, the organic light emitting layer, and the common electrode form an organic light emitting element; and the organic light emitting element is configured to emit light toward the touch sensor.

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

13 . An organic light emitting device comprising:
a substrate; a thin film transistor over a first surface of the substrate; a pixel electrode electrically connected to the thin film transistor; a partition defining an opening over the pixel electrode; an organic light emitting layer comprising a portion in the opening; a common electrode over the organic light emitting layer; a plurality of layers over the common electrode, the plurality of layers comprising a first layer, a second layer, and a third layer sequentially stacked over the common electrode; an organic layer over the plurality of layers; and a touch sensor over the organic layer, wherein the plurality of layers comprise:
a first portion overlapping the organic light emitting layer in a first direction perpendicular to the first surface of the substrate; and
a second portion connected to and extending from the first portion, the second portion overlapping the partition in the first direction,
wherein each of the first portion and the second portion comprises the first layer, the second layer, and the third layer, wherein the organic layer comprises:
a third portion overlapping the first portion in the first direction; and
a fourth portion overlapping the second portion in the first direction,
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 wherein a maximum thickness of the third portion is greater than a maximum thickness of the fourth portion.

14 . The organic light emitting device of claim 13 , wherein the third layer comprises an inorganic material.

15 . The organic light emitting device of claim 14 , wherein first layer comprises an organic material.

16 . The organic light emitting device of claim 15 , wherein the second layer comprises an inorganic material.

17 . The organic light emitting device of claim 15 , wherein first layer contacts the common electrode.

18 . The organic light emitting device of claim 13 , 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.

19 . The organic light emitting device of claim 13 , wherein the second portion further overlaps the pixel electrode and the common electrode in the first direction.

20 . The organic light emitting device of claim 13 , wherein the touch sensor comprises a first touch conductor and a second touch conductor over the organic layer.

21 . The organic light emitting device of claim 20 , further comprising:
a first insulating layer over the organic layer, wherein the first insulating layer comprises a portion between the first touch conductor and the second touch conductor.

22 . The organic light emitting device of claim 21 , wherein each of the first touch conductor and the second touch conductor contact the first insulating layer.

23 . The organic light emitting device of claim 22 , further comprising:
a second insulating layer over the second touch conductor.

24 . The organic light emitting device of claim 20 , wherein one of the first touch conductor and the second tou

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ki
• Min Hoon-Kee

Classifications

• H10K50/844

  Encapsulations · CPC title

• H01L27/3276

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• G09G3/3258

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

• G09G3/3275

  Details of drivers for data electrodes · CPC title