Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12520671-B2
Application number	US-202218076480-A
Country	US
Kind code	B2
Filing date	Dec 7, 2022
Priority date	Mar 25, 2022
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

A display device includes a transistor disposed on a substrate, an organic layer disposed on the transistor and defining grooves, a first pixel electrode disposed on the organic layer, electrically connected to the transistor, and including a pixel metal layer and a pixel protective layer, the pixel protective layer including at least one of an oxide and a halide and surrounding the pixel metal layer, and a dummy electrode disposed on the organic layer, spaced apart from the transistor, and including a dummy metal layer and a dummy protective layer, the dummy protective layer including at least one of an oxide and a halide and surrounding the dummy metal layer.

First claim

What is claimed is:

1 . A display device comprising:
a transistor disposed on a substrate; an organic layer disposed on the transistor and defining grooves; a first pixel electrode disposed on the organic layer, electrically connected to the transistor, and including a pixel metal layer and a pixel protective layer, the pixel protective layer including at least one of an oxide and a halide and surrounding the pixel metal layer; and a dummy electrode disposed on the organic layer, spaced apart from the transistor, and including a dummy metal layer and a dummy protective layer, the dummy protective layer including at least one of an oxide and a halide and surrounding the dummy metal layer.

2 . The display device of claim 1 , wherein the dummy electrode and the first pixel electrode are disposed on a same layer, are spaced apart from each other, and include a same material.

3 . The display device of claim 1 , wherein
the first pixel electrode further includes:
a first sub-pixel electrode disposed under the pixel metal layer; and
a second sub-pixel electrode disposed on the pixel metal layer, and
the dummy electrode further includes:
a first sub-dummy electrode disposed under the dummy metal layer; and
a second sub-dummy electrode disposed on the dummy metal layer.

4 . The display device of claim 3 , wherein
the first sub-pixel electrode and the first sub-dummy electrode are disposed on a same layer and include a same material, the pixel metal layer and the dummy metal layer are disposed on a same layer and include a same material, and the second sub-pixel electrode and the second sub-dummy electrode are disposed on a same layer and include a same material.

5 . The display device of claim 1 , wherein each of the grooves has an undercut shape.

6 . The display device of claim 1 , wherein the grooves surround each of the first pixel electrode and the dummy electrode in a plan view.

7 . The display device of claim 1 , further comprising:
a pixel defining layer disposed on the organic layer and defining a pixel opening overlapping the first pixel electrode in a plan view; a light emitting layer disposed on the pixel defining layer, the first pixel electrode, and the dummy electrode and disposed in the pixel opening; and a common electrode layer disposed on the light emitting layer.

8 . The display device of claim 7 , wherein the dummy electrode is spaced apart from the pixel defining layer.

9 . The display device of claim 7 , wherein
the light emitting layer includes:
a first portion overlapping the first pixel electrode in a plan view; and
a second portion overlapping the dummy electrode in a plan view, and
the first portion and the second portion are spaced apart from each other.

10 . The display device of claim 1 , wherein each of a length from a side surface of the pixel metal layer to a side surface of the pixel protective layer and a length from a side surface of the dummy metal layer to a side surface of the dummy protective layer is about 5 Å to about 1000 Å.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Sungjoo
• Park Joonyong
• Bae Subin
• Sung Hyunah
• Shin Hyuneok
• Lee Dongmin
• Lee Juhyun
• Jeong Yu-Gwang
• Cho Sungwon

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K59/88 Primary

  Dummy elements, i.e. elements having non-functional features · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title