US-20260130058-A1 - DISPLAY DEVICE, METHOD OF MANUFACTURING THE DISPLAY DEVICE, AND ELECTRONIC DEVICE INCLUDING THE DISPLAY DEVICE

Abstract

Provided are a display device, a method of manufacturing the display device, and an electronic device including the display device. The display device includes a substrate, a pixel electrode disposed on the substrate, and a pixel defining layer defining an opening exposing a central portion of the pixel electrode and including a trench portion recessed in a direction toward the pixel electrode. The pixel defining layer includes a first pixel defining layer adjacent to the opening and a second pixel defining layer spaced apart from the first pixel defining layer.

Inventors

• Yeongho LEE
• Junhee Lee
• Jinsu Lee
• Choongyoul Im
• EUNJE JANG
• BEOHMROCK CHOI
• Seong-Yong Hwang

Assignees

• SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date

20260507

Application Date

20251027

Priority Date

20241101

Claims (20)

1. 1 . A display device comprising: a substrate; a pixel electrode disposed on the substrate; and a pixel defining layer defining an opening exposing a central portion of the pixel electrode and comprising a trench portion recessed in a direction toward the pixel electrode, wherein the pixel defining layer comprises: a first pixel defining layer adjacent to the opening; and a second pixel defining layer spaced apart from the first pixel defining layer.
2. 2 . The display device of claim 1 , wherein the pixel defining layer comprises a black pixel defining layer.
3. 3 . The display device of claim 1 , wherein the trench portion is disposed to expose at least a portion of the pixel electrode.
4. 4 . The display device of claim 1 , wherein the pixel electrode is disposed to overlap an entire area of the first pixel defining layer.
5. 5 . The display device of claim 1 , wherein the first pixel defining layer is formed in a shape in which a width of the first pixel defining layer becomes narrower in a direction away from the pixel electrode.
6. 6 . The display device of claim 1 , wherein an inclination angle of a portion of the first pixel defining layer adjacent to the opening is greater than an inclination angle of a portion of the first pixel defining layer adjacent to the trench portion.
7. 7 . The display device of claim 1 , wherein an inclination angle of a portion of the first pixel defining layer adjacent to the trench portion is 11° to 45°.
8. 8 . The display device of claim 1 , wherein the pixel electrode is disposed to overlap at least a portion of the second pixel defining layer.
9. 9 . The display device of claim 1 , wherein the first pixel defining layer and the second pixel defining layer are spaced apart from each other by a distance of 2.0 μm to 2.2 μm.
10. 10 . The display device of claim 1 , further comprising an anti-reflection member disposed on the pixel defining layer to overlap at least a portion of the trench portion.
11. 11 . An electronic device comprising: a substrate; a pixel electrode disposed on the substrate; a pixel defining layer defining an opening exposing a central portion of the pixel electrode and comprising a trench portion recessed in a direction toward the pixel electrode; and a capping layer disposed on the trench portion.
12. 12 . The electronic device of claim 11 , wherein the capping layer comprises a material which is different from a material of the pixel defining layer.
13. 13 . The electronic device of claim 11 , wherein the trench portion is disposed to expose at least a portion of the pixel electrode.
14. 14 . The electronic device of claim 13 , wherein the capping layer is disposed to cover the exposed portion of the pixel electrode.
15. 15 . The electronic device of claim 11 , wherein the pixel defining layer comprises: a first pixel defining layer adjacent to the opening; and a second pixel defining layer spaced apart from the first pixel defining layer.
16. 16 . The electronic device of claim 15 , wherein the capping layer is disposed not to cover an uppermost end of the first pixel defining layer.
17. 17 . The electronic device of claim 15 , wherein the capping layer is disposed to cover an uppermost end of the second pixel defining layer.
18. 18 . The electronic device of claim 15 , wherein the capping layer overlaps the first pixel defining layer by greater than 0 μm and less than or equal to 2.0 μm.
19. 19 . The electronic device of claim 11 , wherein a thickness from the pixel electrode to a lowermost end of the capping layer is 0.4 μm to 0.8 μm.
20. 20 . The electronic device of claim 11 , further comprising an anti-reflection member disposed on the pixel defining layer to overlap at least a portion of the trench portion.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is based on and claims priority under 35 U.S. C. § 119 to Korean Patent Application No. 10-2024-0153621, filed on Nov. 1, 2024, in the Korean Intellectual Property Office and Korean Patent Application No. 10-2025-0074074, filed on Jun. 5, 2025, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND 1. Field One or more embodiments relate to a display device, a method of manufacturing the display device, and an electronic device including the display device. 2. Description of the Related Art As demand for display devices expands, the need for display devices for various purposes also increases. Due to such a trend, display devices tend to be manufactured larger or thinner. Therefore, there is also an increasing need for larger and thinner display devices which provide accurate and vivid colors. SUMMARY One or more embodiments include a display device with improved optical characteristics, a method of manufacturing the display device, and an electronic device including the display device. However, this is only an example, and the technical features of the disclosure are not limited thereto. According to an aspect of the disclosure, a display device includes a substrate, a pixel electrode disposed on the substrate, and a pixel defining layer defining an opening exposing a central portion of the pixel electrode and including a trench portion recessed in a direction toward the pixel electrode. The pixel defining layer includes a first pixel defining layer adjacent to the opening and a second pixel defining layer spaced apart from the first pixel defining layer. In some embodiments, the pixel defining layer may include a black pixel defining layer. In some embodiments, the trench portion may be disposed to expose at least a portion of the pixel electrode. In some embodiments, the pixel electrode may be disposed to overlap an entire area of the first pixel defining layer. In some embodiments, the first pixel defining layer may be formed in a shape in which a width of the first pixel defining layer becomes narrower in a direction away from the pixel electrode. In some embodiments, an inclination angle of a portion of the first pixel defining layer adjacent to the opening may be greater than an inclination angle of a portion of the first pixel defining layer adjacent to the trench portion. In some embodiments, an inclination angle of a portion of the first pixel defining layer adjacent to the trench portion may be 11° to 45°. In some embodiments, the pixel electrode may be disposed to overlap at least a portion of the second pixel defining layer. In some embodiments, the first pixel defining layer and the second pixel defining layer may be spaced apart from each other by a distance of 2.0 μm to 2.2 μm. In some embodiments, the display device may further include an anti-reflection member disposed on the pixel defining layer to overlap at least a portion of the trench portion. According to another aspect of the disclosure, an electronic device includes a substrate, a pixel electrode disposed on the substrate, a pixel defining layer defining an opening exposing a central portion of the pixel electrode and including a trench portion recessed in a direction toward the pixel electrode, and a capping layer disposed on the trench portion. In some embodiments, the capping layer may include a material which is different from a material of the pixel defining layer. In some embodiments, the trench portion may be disposed to expose at least a portion of the pixel electrode. In some embodiments, the capping layer may be disposed to cover the expose portion of the pixel electrode. In some embodiments, the pixel defining layer may include a first pixel defining layer adjacent to the opening and a second pixel defining layer spaced apart from the first pixel defining layer. In some embodiments, the capping layer may be disposed not to cover an uppermost end of the first pixel defining layer. In some embodiments, the capping layer may be disposed to cover an uppermost end of the second pixel defining layer. In some embodiments, the capping layer may overlap the first pixel defining layer by greater than 0 μm and less than or equal to 2.0 μm. In some embodiments, a thickness from the pixel electrode to a lowermost end of the capping layer may be 0.4 μm to 0.8 μm. In some embodiments, the display device may further include an anti-reflection member disposed on the pixel defining layer to overlap at least a portion of the trench portion. BRIEF DESCRIPTION OF THE DRAWINGS These and/or other aspects will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings. FIG. 1 is a schematic perspective view of a display device according to an embodiment. FIG. 2 is a cross-sectional view schematically illustrating an example of