US-20260130063-A1 - DISPLAY DEVICE

Abstract

A display device is provided to include a first insulating layer disposed over a substrate; a circuit area disposed in the first insulating layer; a connection electrode disposed on the first insulating layer and electrically connected to the circuit area; a second insulating layer disposed on the connection electrode; a first electrode pattern disposed on the second insulating layer and electrically connected to the connection electrode; a third insulating layer disposed on the first electrode pattern; a second electrode pattern disposed on the third insulating layer in a first through hole of the third insulating layer and electrically connected to the first electrode pattern; a fourth insulating layer disposed on the second electrode pattern; and a third electrode pattern disposed on the fourth insulating layer and in a second through hole of the fourth insulating layer, the third electrode pattern electrically connected to the second electrode pattern.

Inventors

• Young Hwan HYEON
• Jin Su LIM
• Young Su Lee
• Ju Sang Lee

Assignees

• SK HYNIX INC

Dates

Publication Date

20260507

Application Date

20250319

Priority Date

20241107

Claims (20)

1. 1 . A display device comprising: a substrate; a first insulating layer disposed over the substrate; a circuit area disposed in the first insulating layer; a connection electrode disposed on the first insulating layer and electrically connected to the circuit area; a second insulating layer disposed on the connection electrode; a first electrode pattern disposed on the second insulating layer and electrically connected to the connection electrode; a third insulating layer disposed on the first electrode pattern; a second electrode pattern disposed on the third insulating layer in a first through hole of the third insulating layer and electrically connected to the first electrode pattern; a fourth insulating layer disposed on the second electrode pattern; and a third electrode pattern disposed on the fourth insulating layer and in a second through hole of the fourth insulating layer, the third electrode pattern electrically connected to the second electrode pattern, wherein at least one of the first through hole or the second through hole includes at least two inclined surfaces having slopes different from each other.
2. 2 . The display device of claim 1 , wherein the second through hole comprises a first inclined surface disposed on the second electrode pattern; and a second inclined surface connected to the first inclined surface, and a slope of the first inclined surface of the second through hole is greater than a slope of the second inclined surface of the second through hole.
3. 3 . The display device of claim 2 , wherein the second through hole further comprises a third inclined surface disposed on a second inclined surface of the second through hole, and a slope of the third inclined surface is greater than a slope of the second inclined surface of the second through hole.
4. 4 . The display device of claim 2 , wherein the first through hole comprises a first inclined surface disposed on the first electrode pattern; and a second inclined surface connected to the first inclined surface, and a slope of the first inclined surface of the first through hole is greater than a slope of the second inclined surface of the first through hole.
5. 5 . The display of claim 4 , wherein the first through hole further comprises a third inclined surface on a second inclined surface of the first through hole, and a slope of the third inclined surface of the first through hole is greater than a slope of the second inclined surface of the first through hole.
6. 6 . The display device of claim 1 , wherein the second through hole comprises a first inclined surface disposed on the second electrode pattern; a second inclined surface connected to the first inclined surface; and a third inclined surface connected to the second inclined surface.
7. 7 . The display device of claim 6 , wherein the slope of the first inclined surface of the second through hole is greater than the slope of the second inclined surface of the second through hole, and the slope of the second inclined surface of the second through hole is greater than the slope of the third inclined surface of the second through hole.
8. 8 . The display device of claim 1 , wherein a thickness of the fourth insulating layer is greater than a thickness of the third insulating layer.
9. 9 . The display device of claim 1 , wherein the second through hole comprises three or more inclined surfaces having slopes different from one another, and the first through hole comprises one inclined surface or two inclined surfaces having slopes different from each other.
10. 10 . The display device of claim 1 , wherein a first sub-pixel, a second sub-pixel and a third sub-pixel are provided on the substrate, the first electrode pattern comprises a first reflective electrode of the first sub-pixel; and first connection electrodes of the first sub-pixel to the third sub-pixel, the second electrode comprises second connection electrodes of the first sub-pixel to the third sub-pixel; and a second reflective electrode of the second sub-pixel, and the third electrode pattern comprises third connection electrodes of the first sub-pixel to the third sub-pixel; and a third reflective electrode of the third sub-pixel.
11. 11 . The display device of claim 10 , wherein each of the first sub-pixel, the second sub-pixel and the third sub-pixel comprises an emission area; and a non-emission area disposed adjacent to the emission area, and the first reflective electrode, the second reflective electrode and the third reflective electrode are disposed on the emission area of each sub-pixel.
12. 12 . The display device of claim 1 , further comprising: a first electrode disposed on the third electrode pattern and being in direct contact with the third electrode pattern.
13. 13 . The display device of claim 12 , further comprising: a common light emitting layer disposed on the first electrode; and a second electrode disposed on the common light emitting layer.
14. 14 . A display device comprising: a substrate; a first sub-pixel, a second sub-pixel and a third sub-pixel that are defined on the substrate, each of the first sub-pixel, the second sub-pixel, and the third sub-pixel configured to emit a corresponding colored light; a first reflective electrode disposed on the substrate of the first sub-pixel; first connection electrodes disposed on the substrate of the first sub-pixel to the third sub-pixel; a first insulating layer disposed on the first reflective electrode and the first connection electrodes; second connection electrodes disposed on the first insulating layer of the first sub-pixel to the third sub-pixel; a second reflective electrode disposed on the first insulating layer of the second sub-pixel; a second insulating layer disposed on the second reflective electrode and the second connection electrodes; third connection electrodes disposed on the second insulating layer of the first sub-pixel to the third sub-pixel; a third reflective electrode disposed on the second insulating layer of the third sub-pixel; a first electrode disposed on the third connection electrodes and the third reflective electrode; a common light emitting layer disposed on the first electrode; and a second electrode disposed on the common light emitting layer, wherein a distance between the first reflective electrode and the second electrode is greater than a distance between the second reflective electrode and the second electrode, a distance between the second reflective electrode and the second electrode is greater than a distance between the third reflective electrode and the second electrode, the first insulating layer comprises a third through hole and the second insulating layer comprises a second through hole, and the first through hole or the second through hole comprises at least two inclined surfaces having slopes different from each other.
15. 15 . The display device of claim 14 , wherein the second through hole comprises a first inclined surface disposed on the second connection electrode and a second inclined surface connected to the first inclined surface, and a slope of the first inclined surface of the second through hole is greater than a slope of the second inclined surface of the second through hole.
16. 16 . The display device of claim 15 , wherein the second through hole further comprises a third inclined surface disposed on the second inclined surface of the second through hole, and a slope of the third inclined surface is greater than a slope of the second inclined surface of the second through hole.
17. 17 . The display device of claim 15 , wherein the first through hole comprises a first inclined surface disposed on the first connection electrode and a second inclined surface connected to the first inclined surface, and a slope of the first inclined surface of the first through hole is greater than a slope of the second inclined surface of the first through hole.
18. 18 . The display device of claim 17 , wherein the first through hole further comprises a third inclined surface disposed on the second inclined surface of the first through hole, and a slope of the third inclined surface of the first through hole is greater than a slope of the second inclined surface of the first through hole.
19. 19 . The display device of claim 14 , wherein the second through hole comprises a first inclined surface disposed on the second connection electrode; a second inclined surface connected to the first inclined surface; and a third inclined surface connected to the second inclined surface, and a slope of the first inclined surface of the first through hole is greater than a slope of the second inclined surface of the second through hole, and a slope of the second inclined surface of the second through hole is greater than a slope of the third inclined surface of the second through hole.
20. 20 . The display device of claim 14 , wherein a thickness of the second insulating layer is greater than a thickness of the first insulating layer.

Description

PRIORITY CLAIM AND CROSS-REFERENCE TO RELATED APPLICATIONS This patent document claims the priority and benefits of Korean Patent Application No. 10-2024-0156888, filed on Nov. 7, 2024, the disclosure of which is incorporated by reference in its entirety as part of the disclosure of this patent document. TECHNICAL FIELD Embodiments of the disclosed technology relate to a display device. BACKGROUND As the information society develops, various simplify demands for display devices that display images are increasing and various types of display devices, such as liquid crystal displays and organic light emitting diode displays, are being used. Among such display devices, an organic light emitting diode display is self-luminous and has superior viewing angles and contrast ratios compared to a liquid crystal display (i.e., LCD). The organic light emitting diode display does not require a separate backlight so that it can be lightweight and thin, and has the advantage of lower power consumption. In addition, the organic light emitting display has the advantages of driving at low direct current voltages, a fast response speed and especially low manufacturing costs. Recently, there is an increasing demand for display devices for various applications including, e.g., applications for augmented reality (i.e., AR), virtual reality (i.e., VR), and others in which ultra-high display resolutions are desirable by using light emitting display devices. SUMMARY Some embodiments of the present disclosure may provide a display device including a first through hole or a second through hole which has at least two inclined surfaces with different inclinations, so that an electrode pattern deposited within the first through hole or the second through hole is not interrupted. Some implementations of the disclosed technology provide a display device in which a dark sop defect (or malfunction) of an organic light emitting element is improved by ensuring that the electrode pattern deposited within the first through hole or the second through hole is not broken. Some implementations of the disclosed technology provide a display device that may induce efficient and precise microcavities in each sub-pixel because a planarization process is omitted in a process of depositing the electrode pattern within the first through hole or the second through hole. In one aspect, a display device may include a substrate; a first insulating layer disposed over the substrate; a circuit area disposed in the first insulating layer; a connection electrode disposed on the first insulating layer and electrically connected to the circuit area; a second insulating layer disposed on the connection electrode; a first electrode pattern disposed on the second insulating layer and electrically connected to the connection electrode; a third insulating layer disposed on the first electrode pattern; a second electrode pattern disposed on the third insulating layer in a first through hole of the third insulating layer and electrically connected to the first electrode pattern; a fourth insulating layer disposed on the second electrode pattern; and a third electrode pattern disposed on the fourth insulating layer and in a second through hole of the fourth insulating layer, the third electrode pattern electrically connected to the second electrode pattern, wherein at least one of the first through hole or the second through hole includes at least two inclined surfaces having slopes different from each other. In another aspect of the present disclosure, a display device may include a substrate; a first sub-pixel, a second sub-pixel and a third sub-pixel that are defined on the substrate, each of the first sub-pixel, the second sub-pixel, and the third sub-pixel configured to emit a corresponding colored light; a first reflective electrode disposed on the substrate of the first sub-pixel; first connection electrodes disposed on the substrate of the first sub-pixel to the third sub-pixel; a first insulating layer disposed on the first reflective electrode and the first connection electrodes; second connection electrodes disposed on the first insulating layer of the first sub-pixel to the third sub-pixel; a second reflective electrode disposed on the first insulating layer of the second sub-pixel; a second insulating layer disposed on the second reflective electrode and the second connection electrodes; third connection electrodes disposed on the second insulating layer of the first sub-pixel to the third sub-pixel; a third reflective electrode disposed on the second insulating layer of the third sub-pixel; a first electrode disposed on the third connection electrodes and the third reflective electrode; a common light emitting layer disposed on the first electrode; and a second electrode disposed on the common light emitting layer, wherein a distance between the first reflective electrode and the second electrode is greater than a distance between the second reflective electro