Display device

Patent metadata

Field	Value
Publication number	US-11723254-B2
Application number	US-202117509041-A
Country	US
Kind code	B2
Filing date	Oct 24, 2021
Priority date	Apr 12, 2018
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A display panel including a pixel defining layer including a first portion, in which an opening to expose the first electrode is defined, and a second portion, which is disposed on the first portion and overlaps the first portion. A plurality of thin-films are disposed on the second electrode. An insulation pattern is disposed on the plurality of thin-films, overlaps the pixel defining layer, and overlaps the second portion. A distance between the first portion, which overlaps the insulation pattern, of the sensing electrode and the base insulation layer is greater than that between the second portion, which non-overlaps the insulation pattern, of the sensing electrode and the base insulation layer.

First claim

What is claimed is:

1. A display device comprising:
a display panel; and
an input sensing unit comprising a sensing electrode and disposed directly on the display panel,
wherein:
the display panel comprises:
a light emitting element comprising a first electrode, which contacts a base insulation layer, a second electrode, and a light emitting layer disposed between the first electrode and the second electrode;
a pixel defining layer disposed below the second electrode, contacting the base insulation layer, and comprising a first portion, in which an opening to expose the first electrode is defined, and a second portion, which is disposed on the first portion and overlaps the first portion;
a plurality of thin-films disposed on the second electrode; and
an insulation pattern disposed on the plurality of thin-films, overlapping the pixel defining layer, and overlapping the second portion; and

a shortest distance between a first portion, which overlaps the insulation pattern, of the sensing electrode and the base insulation layer in a thickness direction of the display device is greater than a shortest distance between a second portion, which non-overlaps the insulation pattern, of the sensing electrode and the base insulation layer in the thickness direction of the display device.

2. The display device of claim 1 , wherein a shortest distance between the first portion of the sensing electrode and the second electrode in the thickness direction of the display device is substantially the same as that between the second portion of the sensing electrode and the second electrode in the thickness direction of the display device.

3. The display device of claim 1 , wherein the second portion of the pixel defining layer has a thickness which is substantially the same as a thickness of the insulation pattern.

4. The display device of claim 1 , wherein the second portion of the pixel defining layer overlaps about 90% or more of the insulation pattern on a plane.

5. The display device of claim 1 , wherein one side of the second portion of the pixel defining layer has a length or a diameter of about 10 μm to about 25 μm on a plane.

6. The display device of claim 1 , wherein the first portion of the pixel defining layer and the second portion of the pixel defining layer have a single body.

7. The display device of claim 1 , wherein the sensing electrode has a mesh shape in which an opening corresponding to the opening of the first portion of the pixel defining layer is defined.

8. The display device of claim 1 , further comprising an anti-reflection unit disposed directly on the input sensing unit and comprising a light shielding layer in which an opening corresponding to the opening of the first portion of the pixel defining layer is defined.

9. A display device comprising:
a display panel; and
an input sensing unit comprising a sensing electrode and disposed directly on the display panel,
wherein:
the display panel comprises:
a light emitting element comprising a first electrode disposed on a base insulation layer, a second electrode, and a light emitting layer disposed between the first electrode and the second electrode;
a pixel defining layer disposed between the second electrode and the base insulation layer, and comprising a first portion, in which an opening to expose the first electrode is defined, and a second portion, which is disposed adjacent to the first portion and has a thickness greater than that of the first portion; and
a plurality of thin-films disposed on the second electrode; and
a light shielding layer disposed on the plurality of thin-films and in which an opening corresponding to the opening of the first portion is defined;

the light shielding layer comprises a first area, which overlaps the first portion of the pixel defining layer and does not overlap the second portion of the pixel defining layer, and a second area, which overlaps the second portion of the pixel defining layer and does not overlap the first portion of the pixel defining layer; and
the second area of the light shielding layer has a thickness greater than that of the first area of the light shielding layer.

10. The display device of claim 9 , wherein the light shielding layer comprises:
a metal containing layer overlapping the first area and the second area; and
an organic material pattern overlapping the second area.

11. The display device of claim 10 , wherein the organic material pattern has a thickness that is substantially the same as a difference in thickness between the second area and the first area.

12. The display device of claim 10 , wherein the metal containing layer comprises a molybdenum tantalum oxide (MoTaO x ).

13. A display device comprising:
a display panel;
an input sensing unit comprising a sensing electrode and disposed directly on the display panel; and
a window unit disposed on the input sensing unit,
wherein:
the display panel comprises:
first electrodes disposed on a base insulation layer;
a pixel defining layer disposed on the base insulation layer, and comprising a first portion, in which openings to expose the first electrode are defined, and a second portion, which is disposed adjacent to the first portion and has a thickness greater than that of the first portion;
a second electrode disposed on the pixel defining layer;
at least one light emitting layer disposed between the second electrode and the first electrodes; and
an insulation structure disposed on the second electrode and configured to form a stepped portion between a first area of the sensing electrode, which overlaps the first portion of the pixel defining layer, and a second area of the sensing electrode, which overlaps the second portion of the pixel defining layer.

14. The display device of claim 13 , wherein a distance between a top surface of the window unit and the first area of the sensing electrode is less than a distance between the top surface of the window unit and the second area of the sensing electrode.

15. The display device of claim 14 , wherein a distance between the first portion of the pixel defining layer and the first area of the sensing electrode is substantially the same as a distance between the second portion of the sensing electrode and the second area of the sensing electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• LEE Hyeonbum
• Kim Hyoeng-Ki
• Park Kwangwoo
• Jung Jin-Whan

Classifications

• H10K39/34

  integrated with organic light-emitting diodes [OLED] · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8792

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

• H10K2102/00

  Constructional details relating to the organic devices covered by this subclass · CPC title

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title