Touch sensible organic light emitting device

Patent metadata

Field	Value
Publication number	US-11282902-B2
Application number	US-201916278425-A
Country	US
Kind code	B2
Filing date	Feb 18, 2019
Priority date	Nov 28, 2008
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

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 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 comprising a portion disposed in the opening;
a common electrode on the organic light emitting layer and the partition;
at least two encapsulation layers on the common electrode, the at least two encapsulation layers comprising at least one inorganic layer comprising a first portion overlapping the opening and a second portion overlapping the partition without the opening and adjacent to the first portion in a plan view, the at least one inorganic layer comprising silicon nitride or silicon oxide;
a first planarization layer on the at least two encapsulation layers; and
a touch sensor formed on the first planarization layer,
wherein:
an upper surface of the first portion is lower than an upper surface of the second portion with respect to an upper surface of the substrate;
the touch sensor comprises a capacitive conductive layer; and
the first planarization layer is interposed between the touch sensor and the at least two encapsulation layers.

2. The organic light emitting device of claim 1 , wherein the at least two encapsulation layers comprise three encapsulation layers.

3. The organic light emitting device of claim 2 , further comprising:
a second planarization layer disposed between the pixel electrode and the substrate.

4. The organic light emitting device of claim 3 , wherein the common electrode comprises a transparent conductive material.

5. The organic light emitting device of claim 4 , 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 is configured to emit light toward the touch sensor.

6. The organic light emitting device of claim 5 , wherein the touch sensor comprises a first touch conductor.

7. The organic light emitting device of claim 6 , wherein the touch sensor further comprises a second touch conductor on the first planarization layer.

8. The organic light emitting device of claim 7 , further comprising:
a first insulating layer on the first planarization layer.

9. An organic light emitting device comprising:
a substrate comprising a pixel area where a plurality of pixels capable of displaying an image are disposed;
a thin film transistor on a 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 comprising a portion disposed in the opening;
a common electrode on the organic light emitting layer and the partition;
at least two encapsulation layers on the common electrode, the at least two encapsulation layers comprising at least one inorganic layer;
a layer on the at least two encapsulation layers;
a touch sensor comprising a first capacitive conductive layer; and
a first sensing signal line and a second sensing signal line formed on the layer in a sectional view and outside the pixel area in a plan view,
wherein each of the first and second signal lines comprises:
a first portion extending in a first direction along an edge of the substrate;
a second portion curved from the first portion and extending in a second direction perpendicular to the first direction; and
a third portion curved from the second portion and extending in the first direction, and

wherein:
a distance between the first portion of the first sensing signal line and the first portion of the second sensing signal line is greater than a distance between the third portion of the first sensing signal line and the third portion of the second sensing signal line;
the first capacitive conductive layer is formed on the layer; and
the first sensing signal line or the second sensing signal line is configured to transmit a frequency signal to the first capacitive conductive layer.

10. The organic light emitting device of claim 9 , wherein the at least two encapsulation layers comprise three encapsulation layers.

11. The organic light emitting device of claim 10 , further comprising:
a planarization layer disposed between the pixel electrode and the substrate.

12. The organic light emitting device of claim 11 , wherein the common electrode comprises a transparent conductive material.

13. The organic light emitting device of claim 12 , 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 is configured to emit light toward the touch sensor.

14. The organic light emitting device of claim 13 , wherein the touch sensor further comprises a second capacitive conducive layer.

15. The organic light emitting device of claim 14 , further comprising:
a first insulating layer on the layer.

16. The organic light emitting device of claim 9 , further comprising:
a processor electrically connected to the first and second sensing signal lines.

17. The organic light emitting device of claim 9 , wherein the first and second sensing signal lines directly contact an upper surface of the layer.

18. The organic light emitting device of claim 17 , wherein the at least two encapsulation layers comprise three encapsulation layers.

19. The organic light emitting device of claim 18 , wherein the layer comprises a same material as at least one of the three encapsulation layers.

20. The organic light emitting device of claim 19 , wherein the common electrode comprises a transparent conductive material.

21. An organic light emitting device comprising:
a substrate comprising a pixel area where a plurality of pixels capable of displaying an image are disposed;
a thin film transistor on a 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 comprising a portion disposed in the opening;
a common electrode on the organic light emitting layer and the partition;
at least two encapsulation layers on the common electrode, the at least two encapsulation layers comprising at least two inorganic layers;
an insulating layer formed on the at least two encapsulation layers;
a touch sensor comprising a first conductive layer formed on the insulating layer; and
a first sensing signal line and a second sensing signal line,
wherein:
the first conductive layer is disposed directly on the insulating layer; and
the first and second sensing signal lines are formed on the at least two encapsulation layers in a sectional view and outside the pixel area in a plan view,

wherein each of the first and second sensing signal lines comprises:
a first portion extending in a first direction along an edge of the substrate;
a second portion curved from the first portion and extending in a second direction perpendicular to the first direction; and
a third portion curved from the second portion and extending in the first direction, and

wherein:
a distance between the first portion of the first sensing signal line and the first portion of the second sensing signal line is greater than a distance between the third portion of the first sensing signal line and the third portion of the second sensing signal

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ki
• Min Hoon-Kee

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title

• G06F3/045 Primary

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title