Display device and electronic device including the same

Patent metadata

Field	Value
Publication number	US-2025393415-A1
Application number	US-202519061416-A
Country	US
Kind code	A1
Filing date	Feb 24, 2025
Priority date	Jun 25, 2024
Publication date	Dec 25, 2025
Grant date	—

Abstract

A display device includes: a substrate; a first electrode disposed on the substrate; a pixel defining layer having a pixel opening disposed on the first electrode; a light emitting layer disposed in the pixel opening; a second electrode disposed on the light emitting layer; an encapsulation layer disposed on the second electrode; and a light blocking member disposed on the encapsulation layer, overlapping the pixel defining layer, and having a light blocking member opening, wherein an entire upper surface of the pixel defining layer overlaps the light blocking member, and at least a portion of a side surface of the pixel defining layer overlaps the light blocking member opening.

First claim

What is claimed is:

1 . A display device comprising:
a substrate; a first electrode disposed on the substrate; a pixel defining layer having a pixel opening disposed on the first electrode; a light emitting layer disposed in the pixel opening; a second electrode disposed on the light emitting layer; an encapsulation layer disposed on the second electrode; and a light blocking member disposed on the encapsulation layer, overlapping the pixel defining layer, and having a light blocking member opening, wherein an entire upper surface of the pixel defining layer overlaps the light blocking member, and at least a portion of a side surface of the pixel defining layer overlaps the light blocking member opening.

2 . The display device of claim 1 , wherein
a contact line where the upper surface and the side surface of the pixel defining layer meet overlaps the light blocking member.

3 . The display device of claim 1 , wherein
at least a portion of the side surface of the pixel defining layer overlaps the light blocking member.

4 . The display device of claim 1 , wherein
a separation distance (Pullback) that is a minimum planar distance between an edge portion of the side surface of the pixel defining layer and an edge portion of the light blocking member, a margin distance (Margin) that is a minimum planar distance between an edge portion of the upper surface of the pixel defining layer and an edge portion of the light blocking member, an inclination angle (θ) that is an angle formed by the side surface of the pixel defining layer and the upper surface of the first electrode, and a thickness (h) that is a vertical distance in a cross-sectional view between the upper surface of the pixel defining layer and the upper surface of the first electrode are in a relationship as follows.

tan
⁢

θ

=

h

Pullback
+
Margin

5 . The display device of claim 4 , wherein
the separation distance is in a range of about 4 μm to about 6 μm, and the margin distance is greater than about 0 and less than or equal to about 2 μm.

6 . The display device of claim 5 , wherein
the inclination angle is in a range of about 20.5° to about 30°.

7 . The display device of claim 5 , wherein
the thickness is in a range of about 2 μm to about 4 μm.

8 . The display device of claim 1 , further comprising
a color filter disposed between adjacent light blocking members.

9 . The display device of claim 8 , further comprising
a cover window disposed on the light blocking member and the color filter.

10 . A display device comprising:
a substrate; a first electrode disposed on the substrate; a first pixel defining layer having a first pixel opening and a second pixel defining layer having a second pixel opening, wherein the first pixel opening and the second pixel opening are disposed on the first electrode; a first light emitting layer disposed in the first pixel opening; a second light emitting layer disposed in the second pixel opening; a second electrode disposed on the first light emitting layer and the second light emitting layer; an encapsulation layer disposed on the second electrode; and a light blocking member disposed on the encapsulation layer, overlapping the first pixel defining layer and the second pixel defining layer, and having a light blocking member opening, wherein the first pixel defining layer includes a first upper surface and a first side surface, the entire first upper surface overlaps the light blocking member and at least a portion of the first side surface overlaps the light blocking member opening, the second pixel defining layer includes a second upper surface and a second side surface, and at least a portion of the second upper surface overlaps the light blocking member opening.

11 . The display device of claim 10 , wherein
the second side surface of the second pixel defining layer is spaced apart from the light blocking member in a plan view.

12 . The display device of claim 10 , wherein
a first contact line where the first upper surface and the first side surface meet overlaps the light blocking member, and a second contact line where the second upper surface and the second side surface meet overlaps the light blocking member opening.

13 . The display device of claim 10 , wherein
the first light emitting layer and the second light emitting layer emit light of different colors.

14 . An electronic device comprising:
a display device comprising:
a substrate;
a first electrode disposed on the substrate;
a pixel defining layer having a pixel opening disposed on the first electrode;
a light emitting layer disposed in the pixel opening;
a second electrode disposed on the light emitting layer;
an encapsulation layer disposed on the second electrode; and
a light blocking member disposed on the encapsulation layer, overlapping the pixel defining layer, and having a light blocking member opening, wherein
an entire upper surface of the pixel defining layer overlaps the light blocking member, and at least a portion of a side surface of the pixel defining layer overlaps the light blocking member opening.

15 . The electronic device of claim 14 , wherein
a contact line where the upper surface and the side surface of the pixel defining layer meet overlaps the light blocking member.

16 . The electronic device of claim 14 , wherein
at least a portion of the side surface of the pixel defining layer overlaps the light blocking member.

17 . The electronic device of claim 14 , wherein
a separation distance (Pullback) that is a minimum planar distance between an edge portion of the side surface of the pixel defining layer and an edge portion of the light blocking member, a margin distance (Margin) that is a minimum planar distance between an edge portion of the upper surface of the pixel defining layer and an edge portion of the light blocking member, an inclination angle (θ) that is an angle formed by the side surface of the pixel defining layer and the upper surface of the first electrode, and a thickness (h) that is a vertical distance in a cross-sectional view between the upper surface of the pixel defining layer and the upper surface of the first electrode are in a relationship as follows.

tan
⁢

θ

=

h

Pullback
+
Margin

18 . The electronic device of claim 17 , wherein
the separation distance is in a range of about 4 μm to about 6 μm, and the margin distance is greater than about 0 and less than or equal to about 2 μm.

19 . The electronic device of claim 14 , wherein the electronic device is at least one of an organic light-emitting display apparatus, an inorganic light-emitting display apparatus, a quantum dot light-emitting display apparatus, display screens of portable electronic apparatus, such as mobile phones, smartphones, tablet personal computers (PCs

Assignees

• Samsung Display Co Ltd

Inventors

• Choi Yechan
• Kim Changwook
• Ann Minjung
• Lee Jun Hee
• Cho Hyun Duck
• Choi Kook Hyun
• Choi Beohm Rock

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K59/8792 Primary

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

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K2102/351

  Thickness · CPC title