Touch sensible organic light emitting device

Patent metadata

Field	Value
Publication number	US-11522022-B2
Application number	US-202217699195-A
Country	US
Kind code	B2
Filing date	Mar 21, 2022
Priority date	Nov 28, 2008
Publication date	Dec 6, 2022
Grant date	Dec 6, 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 comprising a pixel area where a plurality of pixels capable of displaying an image are disposed;
a thin film transistor provided on 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 provided 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 an inorganic layer;
a layer provided 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,
is 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 signal to the first capacitive conductive layer.

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

3. The organic light emitting device of claim 2 , further comprising:
a 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 further comprises a second capacitive conducive layer.

7. The organic light emitting device of claim 6 , further comprising:
a first insulating layer provided on the layer.

8. The organic light emitting device of claim 3 , further comprising:
a processor electrically connected to the first and second sensing signal lines.

9. The organic light emitting device of claim 1 , wherein the first and second sensing signal lines directly contact an upper surface of the layer.

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

11. The organic light emitting device of claim 10 , wherein the layer comprises a same material as at least one of the three encapsulation layers.

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

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ki
• Min Hoon-Kee

Classifications

• G09G3/3225

  using an active matrix · CPC title

• G06F3/0444

  using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners · CPC title

• 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

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title