Organic light-emitting display device with sensing lines partially overlapping a common electrode

Patent metadata

Field	Value
Publication number	US-11183553-B2
Application number	US-201816175730-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Feb 8, 2018
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

An organic light-emitting display device including: a substrate; a pixel electrode on the substrate; a pixel defining film on the pixel electrode and having a first opening at least partially exposing the pixel electrode; an organic light-emitting layer on the exposed portion of the pixel electrode; a common electrode on the organic light-emitting layer and the pixel defining film; an encapsulation layer on the common electrode; a black matrix on the encapsulation layer and having a second opening overlapping the first opening; and a plurality of first sensing lines on the black matrix and surrounding the pixel electrode in a plan view to define a pixel region. At least portions of the first sensing lines defining the pixel region do not overlap the common electrode in the pixel region to reduce the common electrode's influence on the touch sensing lines and improve touch sensitivity.

First claim

What is claimed is:

1. An organic light-emitting display device comprising:
a substrate;
a plurality of pixel electrodes on a surface of the substrate;
a pixel defining film on the pixel electrodes and having first openings at least partially exposing the pixel electrodes;
an organic light-emitting layer on the exposed portion of the pixel electrodes;
a common electrode on the organic light-emitting layer and the pixel defining film, the common electrode comprising a plurality of body portions over the pixel electrodes and integral connecting portions extending between adjacent ones of the body portions over the pixel defining film;
an encapsulation layer on the common electrode;
a black matrix on the encapsulation layer and having second openings overlapping the first openings; and
a plurality of first sensing lines on the black matrix and surrounding the pixel electrode in a plan view to define a pixel region, at least portions of the first sensing lines defining the pixel region do not overlap the common electrode in the pixel region,
wherein the adjacent ones of the body portions are adjacent to each other in a first direction, and
wherein a width of the connecting portions in a second direction perpendicular to the first direction is smaller than a width of the body portions in the second direction, the first and second directions being parallel to the surface of the substrate.

2. The organic light-emitting display device of claim 1 , wherein a width of the second openings in the black matrix is in a range of 3.0 μm to 4.4 μm.

3. The organic light-emitting display device of claim 1 , wherein a height of the encapsulation layer is in a range of 3.4 μm to 6.2 μm.

4. The organic light-emitting display device of claim 1 , wherein an overlapping area ratio between the first sensing lines and the common electrode is in a range of 2.5% to 77.5%.

5. The organic light-emitting display device of claim 1 , wherein, in the pixel region, the first sensing lines and the common electrode overlap each other at a plurality of regions.

6. The organic light-emitting display device of claim 1 , wherein the black matrix is directly on the encapsulation layer.

7. The organic light-emitting display device of claim 1 , wherein the black matrix completely overlaps the first sensing lines.

8. The organic light-emitting display device of claim 1 , wherein the encapsulation layer comprises at least one of an organic layer and at least one of an inorganic layer.

9. The organic light-emitting display device of claim 1 , wherein the first sensing lines are arranged in a mesh shape.

10. The organic light-emitting display device of claim 1 , wherein an angle between a first imaginary line connecting one side of the organic light-emitting layer to one side of the second openings in the black matrix and a second imaginary line extending vertically from the surface of the substrate is 45°.

11. The organic light-emitting display device of claim 1 , wherein a first region is defined as a region in which a first sensing line of the plurality of first sensing lines and the common electrode overlap each other,
wherein a second region is defined as a region in which the first sensing line does not overlap the common electrode, and
wherein the first region overlaps the black matrix.

12. An organic light-emitting display device comprising:
a display panel for displaying an image, the display panel comprising:
a substrate;
a plurality of pixel electrodes on a surface of the substrate;
a pixel defining film having first openings at least partially exposing the pixel electrodes;
a common electrode on the pixel defining film, the common electrode comprising a plurality of body portions over the pixel electrodes and integral connecting portions extending between adjacent ones of the body portions over the pixel defining film;
an encapsulation layer on the common electrode; and
a black matrix on the encapsulation layer and having second openings overlapping the first openings; and

an input sensing layer on the display panel, the input sensing layer comprising a plurality of first sensing lines surrounding the pixel electrodes in a plan view, the first sensing lines having first regions that overlap the common electrode and second regions that do not overlap the common electrode,
wherein the adjacent ones of the body portions are adjacent to each other in a first direction, and
wherein a width of the connecting portions in a second direction perpendicular to the first direction is smaller than a width of the body portions in the second direction, the first and second directions being parallel to the surface of the substrate.

13. The organic light-emitting display device of claim 12 , wherein a width of the second openings in the black matrix is in a range of 3.0 μm to 4.4 μm.

14. The organic light-emitting display device of claim 12 , wherein a distance from a top surface of the pixel defining film to a top surface of the encapsulation layer is in a range of 3.4 μm to 6.2 μm.

15. The organic light-emitting display device of claim 12 , wherein, in a pixel region defined by the first sensing lines, an overlapping area ratio between the first sensing lines and the common electrode is in a range of 2.5% to 77.5%.

16. The organic light-emitting display device of claim 15 , wherein there are a plurality of the first regions in the pixel region.

17. The organic light-emitting display device of claim 12 , wherein the input sensing layer is directly on the display panel.

18. The organic light-emitting display device of claim 12 , wherein the first sensing lines are arranged in a mesh shape.

19. The organic light-emitting display device of claim 12 , wherein the black matrix completely overlaps the first sensing lines.

20. The organic light-emitting display device of claim 12 , wherein the encapsulation layer comprises at least one of an organic layer and at least one of an inorganic layer.

21. The organic light-emitting display device of claim 12 , wherein the display panel further comprises an organic light-emitting layer on the exposed portion of the first openings, and
wherein an angle between a first imaginary line connecting one side of the organic light-emitting layer and one side of the second openings in the black matrix and a second imaginary line extending vertically from the surface of the substrate is 45°.

22. The organic light-emitting display device of claim 12 , wherein the first regions overlap the black matrix.

Assignees

• Samsung Display Co Ltd

Inventors

• Woo Jun Hyuk
• Park Kwang Woo
• Kim Hyoeng Ki
• Lee Eon Joo
• JUNG Jin Whan
• Kim Jeong Won
• Lee Hyeon Bum

Classifications

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/873

  Encapsulations · CPC title