Display device

Patent metadata

Field	Value
Publication number	US-10476038-B2
Application number	US-201815955422-A
Country	US
Kind code	B2
Filing date	Apr 17, 2018
Priority date	Sep 20, 2017
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A display device may include a switching composite layer, a first electrode, a pixel defining layer, an emission layer, a second electrode, an encapsulation layer, a light blocking layer, and a touch sensor. The first electrode is positioned on the switching composite layer. The pixel defining layer covers an edge of the first electrode and has a first opening and a second opening that are spaced from each other. The emission layer is positioned inside the first opening. The second electrode covers the switching composite layer, the pixel defining layer, and the emission layer. The encapsulation layer covers the second electrode. The light blocking layer is positioned on the encapsulation layer. The touch sensor is positioned on the light blocking layer and includes a sensing electrode set. A material portion is positioned inside the second opening of the pixel defining layer and overlaps the sensing electrode set.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a switching composite layer positioned on the substrate;
a first electrode positioned on the switching composite layer;
a pixel defining layer covering an edge of the first electrode and having a first opening and a second opening that are spaced from each other;
an emission layer positioned inside the first opening;
a second electrode covering the switching composite layer, the pixel defining layer, and the emission layer;
an encapsulation layer covering the second electrode;
a light blocking layer positioned on the encapsulation layer; and
a touch sensor positioned on the light blocking layer and including a sensing electrode set,
wherein a material portion is positioned inside the second opening of the pixel defining layer, overlaps a light blocking material part of the light blocking layer, and overlaps the sensing electrode set, and
wherein the light blocking material part of the light blocking layer is wider than the second opening of the pixel defining layer.

2. The display device of claim 1 , wherein
the sensing electrode set includes a mesh structure comprising conductive wires that are electrically connected to each other and include a first conductive wire, and
the material portion overlaps the first conductive wire.

3. The display device of claim 2 , wherein
the light blocking layer overlaps the pixel defining layer.

4. The display device of claim 3 , wherein
a center portion of the light blocking material part of the light blocking layer overlaps the material portion.

5. The display device of claim 2 , wherein
the first conductive wire is spaced from the material portion.

6. The display device of claim 2 , wherein
the material portion is a first portion of the second electrode and directly contacts the switching composite layer.

7. The display device of claim 6 , wherein
a distance between the material portion and the light blocking layer is greater than a distance between a second portion of the second electrode and the light blocking layer,
the second portion of the second electrode is positioned between the pixel defining layer and the light blocking layer in a direction perpendicular to the substrate.

8. The display device of claim 7 , wherein
a distance between the material portion and a flat surface of the encapsulation layer is greater than a distance between the second portion of the second electrode positioned and the flat surface of the encapsulation layer, and
the flat surface of the encapsulation layer is parallel to the substrate.

9. The display device of claim 2 , wherein
a distance between two spaced and immediately neighboring portions of the light blocking layer in a cross-sectional view of the display device is greater than a width of the first opening in the cross-sectional view of the display device.

10. The display device of claim 2 , wherein
the sensing electrode set includes a first sensing electrode and a second sensing electrode spaced from each other in a plan view of the display device,
the touch sensor includes
a first insulating layer positioned between the light blocking layer and the sensing electrode set, and
a second insulating layer including an insulating portion positioned between the first sensing electrode and the second sensing electrode, and
the second insulating layer includes an inorganic material.

11. The display device of claim 10 , wherein
the touch sensor includes a third insulating layer covering the sensing electrode set, and
the third insulating layer includes an organic material.

12. The display device of claim 2 , wherein
the emission layer is positioned between two immediately neighboring conductive wires of the conductive wires.

13. The display device of claim 2 , further comprising
a polarizer positioned on the touch sensor, and
a window positioned on the polarizer.

14. The display device of claim 2 , further comprising
a cover layer positioned between the light blocking layer and the touch sensor.

15. The display device of claim 14 , wherein
the cover layer includes an organic material.

16. The display device of claim 14 , wherein
the sensing electrode set includes a first sensing electrode and a second sensing electrode spaced from each other in a plan view of the display device,
the touch sensor includes
a first insulating layer positioned between the light blocking layer and the sensing electrode set, and
a second insulating layer including an insulating portion positioned between the first sensing electrode and the second sensing electrode,
the second insulating layer includes an inorganic material, and
the cover layer is positioned between the light blocking layer and the first insulating layer.

17. The display device of claim 2 , further comprising
a color filter positioned between two spaced and immediately neighboring portions of the light blocking layer,
wherein the color filter is positioned directly on the encapsulation layer.

18. The display device of claim 17 , wherein
the color filter does not overlap any conductive wire of the sensing electrode set in a direction perpendicular to the substrate.

19. The display device of claim 17 , further comprising
a cover layer covering the light blocking layer and the color filter,
wherein the sensing electrode set includes a first sensing electrode and a second sensing electrode spaced from each other in a plan view of the display device,
the touch sensor includes
a first insulating layer positioned between the light blocking layer and the sensing electrode set, and
a second insulating layer including an insulating portion positioned between the first sensing electrode and the second sensing electrode,
the second insulating layer includes an inorganic material, and
the cover layer is positioned between the light blocking layer and the first insulating layer.

20. The display device of claim 19 , wherein
the cover layer includes an organic material.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Kwang Woo
• Kim Jeong Won
• Lee Hyeon Bum
• Jung Jin-Whan
• Ju Jin Ho

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H01L2251/5315

  Electricity · mapped topic

• H01L27/322

  Electricity · mapped topic

• H01L27/3206

  Electricity · mapped topic