Touch sensible organic light emitting device

Patent metadata

Field	Value
Publication number	US-12386474-B2
Application number	US-202318222475-A
Country	US
Kind code	B2
Filing date	Jul 16, 2023
Priority date	Nov 28, 2008
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

An organic light emitting device includes: 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. A 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 first insulating layer defining an opening on the pixel electrode;
a light emitting layer comprising a portion disposed in the opening;
a common electrode on the light emitting layer and the first insulating layer;
a first thin film layer formed on the common electrode;
a second thin film layer formed on the first thin film layer;
an organic layer formed on the second thin film layer; and
a touch sensor formed on the organic layer without any adhesive layer for adhering between the touch sensor and the organic layer,
wherein the second thin film layer comprising a first portion overlapping the opening and a second portion overlapping the first insulating layer outside the opening and adjacent to the first portion in a plan view, and
wherein a first distance between an upper surface of the first portion and the surface of the substrate is less than a second distance between an upper surface of the second portion and the surface of the substrate.

2. The light emitting device of claim 1 , wherein at least one of the first thin film layer and the second thin film layer comprises an inorganic material.

3. The light emitting device of claim 2 , wherein at least one of the first thin film layer and the second thin film layer comprises silicon nitride or silicon oxide.

4. The light emitting device of claim 1 , wherein the first insulating layer comprises an organic material and a black pigment.

5. The light emitting device of claim 1 , further comprising a third thin film layer formed on the second thin film layer.

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

7. The light emitting device of claim 1 , wherein a light emitted from the light emitting layer is configured to go toward the touch sensor.

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

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

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

11. The light emitting device of claim 9 , wherein the first touch conductor and the second touch conductor form a capacitor.

12. The light emitting device of claim 8 , wherein the substrate comprises a pixel area where a plurality of pixels capable of displaying an image are disposed, and
wherein the light emitting device further comprises a first sensing signal line and a second sensing signal line formed on the organic layer in a sectional view and outside the pixel area in the plan view.

13. The light emitting device of claim 12 , wherein each of the first sensing signal line and the second sensing signal line 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.

14. The light emitting device of claim 13 , wherein the first sensing signal line or the second sensing signal line is configured to transmit a frequency signal to the first touch conductor.

15. The light emitting device of claim 14 , wherein the first and second sensing signal lines comprise aluminum.

16. The light emitting device of claim 12 , further comprising a processor electrically connected to the first and second sensing signal lines.

17. The light emitting device of claim 12 , wherein the first and second sensing signal lines directly contact a first surface of the organic layer.

18. An electronic device comprising:
a display panel;
a driver connected to the display panel;
a sensing signal processor connected to the display panel; and
a touch determining unit connected to the sensing signal processor,
wherein the display panel comprises:
a substrate;
a thin film transistor on a surface of the substrate;
a pixel electrode electrically connected to the thin film transistor;
a first insulating layer defining an opening on the pixel electrode;
a light emitting layer comprising a portion disposed in the opening;
a common electrode on the light emitting layer and the first insulating layer;
a first thin film layer formed on the common electrode;
a second thin film layer formed on the first thin film layer;
an organic layer formed on the second thin film layer; and
a touch sensor formed on the organic layer without any adhesive layer for adhering between the touch sensor and the organic layer,
wherein the second thin film layer comprises a first portion overlapping the opening and a second portion overlapping the first insulating layer outside the opening and adjacent to the first portion in a plan view, and
wherein a first distance between an upper surface of the first portion and the surface of the substrate is less than a second distance between an upper surface of the second portion and the surface of the substrate.

19. The electronic device of claim 18 , wherein a light emitted from the light emitting layer is configured to go toward the touch sensor.

20. The electronic device of claim 19 , wherein the touch sensor comprises a first touch conductor on the organic layer.

21. The electronic device of claim 20 , wherein the substrate comprises a pixel area where a plurality of pixels capable of displaying an image are disposed, and
wherein the display panel further comprises a first sensing signal line and a second sensing signal line formed on the organic layer in a sectional view and outside the pixel area in the plan view.

22. The electronic device of claim 21 , wherein the sensing signal processor is electrically connected to the first sensing signal line and the second sensing signal line.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong-Ki
• Min Hoon-Kee

Classifications

• 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

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G3/3225

  using an active matrix · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title