Light emitting display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12349556-B2
Application number	US-202217584747-A
Country	US
Kind code	B2
Filing date	Jan 26, 2022
Priority date	Aug 4, 2021
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A light emitting display device includes a substrate, an organic layer, a conductor, an anode, and a pixel definition layer. The organic layer overlaps the substrate and has a connection opening. The conductor is positioned between the substrate and the organic layer. The anode is positioned on the organic layer and is partially positioned inside the connection opening. The pixel definition layer exposes an exposed portion of the anode. The organic layer has a halftone exposure portion and a neighboring portion. The halftone exposure portion overlaps the exposed portion of the anode and overlaps the conductor. The neighboring portion neighbors the halftone exposure portion. A face of the halftone exposure portion and a face of the neighboring portion are spaced from the substrate by a first distance and a second distance, respectively. A difference between the first distance and the second distance is 30 nm or less.

First claim

What is claimed is:

1. A light emitting display device comprising:
a substrate;
a first data conductive layer positioned above the substrate;
a first organic layer positioned on the first data conductive layer;
a second data conductive layer positioned on the first organic layer;
a second organic layer and a third organic layer sequentially positioned on the second data conductive layer and having an anode connection opening;
an anode positioned on the third organic layer and partially positioned inside the anode connection opening;
a pixel definition layer having an anode exposure opening that exposes an exposed portion of the anode;
a cathode overlapping both the pixel definition layer and the anode; and
an encapsulation layer covering the cathode, wherein
the second organic layer and the third organic layer respectively have a halftone exposure portion and a neighboring portion,
the halftone exposure portion overlaps the exposed portion of the anode and overlaps the second data conductive layer or the first data conductive layer,
the neighboring portion neighbors the halftone exposure portion and does not overlap the second data conductive layer, and
a height difference between a top surface of the halftone exposure portion and a top surface of the neighboring portion is equal to or less than 30 nm.

2. The light emitting display device of claim 1 , wherein the second organic layer and the third organic layer overlap each other.

3. The light emitting display device of claim 2 , wherein
the halftone exposure portion includes a first halftone exposure portion and a second halftone exposure portion,
the first halftone exposure portion is included in the second organic layer, and
the second halftone exposure portion is included in the third organic layer and overlaps the first halftone exposure portion.

4. The light emitting display device of claim 3 , further comprising:
a red color filter;
a green color filter; and
a blue color filter, wherein
the first halftone exposure portion and the second halftone exposure portion overlap one of the red color filter and the blue color filter, and
the second organic layer further includes a green-pixel halftone exposure portion overlapping the green color filter.

5. The light emitting display device of claim 4 , wherein
the first data conductive layer overlaps the green color filter, and
the second data conductive layer overlaps the red color filter or the blue color filter.

6. The light emitting display device of claim 4 , wherein
a thickness of the second organic layer is greater than 1 μm and less than 2 μm, and
a thickness of the third organic layer is greater than 1 μm and less than 2 μm.

7. The light emitting display device of claim 4 , wherein
the anode connection opening includes a first opening and a second opening,
the first opening is included in the second organic layer,
the second opening is included in the third organic layer, and
the second organic layer includes a stepped structure exposed by the second opening.

8. The light emitting display device of claim 2 , wherein
the halftone exposure portion is included in only one of the second organic layer and the third organic layer.

9. The light emitting display device of claim 8 , wherein
the halftone exposure portion is included in only the second organic layer.

10. The light emitting display device of claim 1 , wherein
two opposite faces of the organic layer are formed of a same material and respectively directly contact the second data conductive layer and the anode.

11. The light emitting display device of claim 1 , further comprising:
a light blocking layer positioned on the encapsulation layer and having a color filter opening;
a color filter filling the color filter opening; and
a sensing electrode covered by the light blocking layer, wherein
the halftone exposure portion overlaps the color filter.

12. The light emitting display device of claim 11 , wherein
a perimeter of the halftone exposure portion surrounds a perimeter of the anode exposure opening in a plan view of the light emitting display device, and
the perimeter of the halftone exposure portion is surrounded by a perimeter of the color filter in the plan view of the light emitting display device.

13. The light emitting display device of claim 1 , further comprising:
a spacer positioned between the pixel definition layer and the cathode, wherein
the spacer includes a first portion and a second portion shorter than the first portion in a direction perpendicular to the substrate and integrally formed with the first portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jun Hee
• Choi Beohm Rock
• Woo Jun Hyuk
• Im Choong Youl
• Cho Seong Min

Classifications

• H10K50/818

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K59/8792

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

• H10K71/00

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