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JP-2026075042-A - display device

JP2026075042AJP 2026075042 AJP2026075042 AJP 2026075042AJP-2026075042-A

Abstract

[Problem] To improve the color deviation of light emitted through the bank in the non-emitting region. [Solution] A display device according to one embodiment includes a substrate in which subpixels including an emitting region and a non-emitting region surrounding the emitting region are defined, a reflective electrode on the substrate, an anode electrode on the reflective electrode of the emitting region, a bank on the anode electrode of the non-emitting region, and a first emitting layer on the anode electrode of the emitting region, wherein the surface height of the bank and the surface height of the first emitting layer are the same. [Selection Diagram] Figure 1

Inventors

  • ジュン ソング

Assignees

  • エルジー ディスプレイ カンパニー リミテッド

Dates

Publication Date
20260507
Application Date
20250714
Priority Date
20241021

Claims (17)

  1. A substrate in which subpixels including an emitting region and a non-emitting region surrounding the emitting region are defined, The reflective electrode on the substrate, The anode electrode on the reflecting electrode of the light-emitting region, The bank on the anode electrode in the non-emitting region, The light-emitting region includes a first light-emitting layer on the anode electrode, A display device in which the surface height of the bank and the surface height of the first light-emitting layer are the same.
  2. The display device according to claim 1, wherein the thickness of the bank and the thickness of the first light-emitting layer are the same.
  3. The display device according to claim 1, wherein the outer surface of the bank is hydrophobic.
  4. The display device according to claim 1, further comprising a second light-emitting layer on the first light-emitting layer, wherein the second light-emitting layer is arranged across the light-emitting region and the non-light-emitting region, and the surface of the second light-emitting layer is flat.
  5. The display device according to claim 4, wherein the second light-emitting layer has a void in the non-light-emitting region.
  6. The display device according to claim 1, further comprising at least one insulating layer between the reflective electrode and the anode electrode, wherein the insulating layer has trench portions recessed in the thickness direction in the non-emitting region.
  7. The display device according to claim 6, wherein a residue is further disposed in the trench portion, and the residue contains the same material as the first light-emitting layer.
  8. The display device according to claim 1, wherein the subpixels include a first subpixel, a second subpixel, and a third subpixel, and the thicknesses of the first light-emitting layer of the first subpixel, the first light-emitting layer of the second subpixel, and the first light-emitting layer of the third subpixel are different from each other.
  9. The display device according to claim 8, wherein the thickness of the bank of the first subpixel, the thickness of the bank of the second subpixel, and the thickness of the bank of the third subpixel are different from each other.
  10. The display device according to claim 1, wherein the subpixels include a first subpixel, a second subpixel, and a third subpixel, and the thickness of the anode electrode of the first subpixel, the thickness of the anode electrode of the second subpixel, and the thickness of the anode electrode of the third subpixel are different from each other.
  11. A substrate in which subpixels are defined, including an emitting region and a non-emitting region surrounding the emitting region, The reflective electrode on the substrate, The anode electrode on the reflecting electrode of the light-emitting region, The bank on the anode electrode in the non-emitting region, The light-emitting region includes a light-emitting layer on the anode electrode, A display device in which the surface height of the bank and the surface height of the anode electrode in the light-emitting region are the same.
  12. The display device according to claim 11, further comprising at least one insulating layer between the reflective electrode and the anode electrode, wherein the insulating layer has trench portions recessed in the thickness direction in the non-emitting region.
  13. The display device according to claim 12, wherein the bank does not overlap with the trench portion.
  14. The display device according to claim 12, wherein the bank extends and is disposed within the trench portion, and the light-emitting layer is in direct contact with the side surface of the bank within the trench portion.
  15. A substrate in which subpixels including an emitting region and a non-emitting region surrounding the emitting region are defined, The reflective electrode on the substrate, At least one insulating layer on the reflective electrode, wherein a trench portion recessed in the thickness direction is formed in the non-luminescent region, The anode electrode on the at least one insulating layer, The bank on the anode electrode in the non-emitting region, The light-emitting layer on the anode electrode of the light-emitting region, The cathode electrode on the light-emitting layer, The capping layer on the cathode electrode, A display device comprising the non-luminescent region and a step compensation portion on the capping layer.
  16. The display device according to claim 15, wherein the step compensation section contains an organic substance.
  17. The display device according to claim 15, wherein in the non-luminescent region, the surface height of the step compensation portion is the same as the surface height of the capping layer.

Description

This specification relates to display devices. With the development of the information society, various demands for image display devices have increased, and various types of display devices such as liquid crystal displays and organic light-emitting diode displays are being used. Among display devices, organic light-emitting displays (OLEDs) are self-emissive and offer advantages over liquid crystal displays (LCDs) in terms of viewing angle and contrast ratio. They also do not require a separate backlight, allowing for lighter and thinner designs and lower power consumption. Furthermore, OLEDs can be driven by low DC voltage, resulting in fast response times and, in particular, lower manufacturing costs. Recently, there has been increasing demand for display devices using such organic light-emitting devices that require Augmented Reality (AR), Virtual Reality (VR), or equivalent levels of ultra-high resolution. This is a plan view of a display device according to one embodiment.This is a cross-sectional view taken along the line A-A' in Figure 1.This is a cross-sectional view taken along the line B-B' in Figure 1.Figure 2 is a cross-sectional view of an organic light-emitting device.This is a cross-sectional view of an organic light-emitting element according to a modified example of Figure 2.This is an enlarged cross-sectional view of region Q1 in Figure 2.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention.This is a cross-sectional view of another display device according to the present invention. Embodiments will be described below with reference to the drawings. In this specification, when a component (or region, layer, portion, etc.) is referred to as "on top of," "connected to," or "joined to" another component, it means that it may be directly connected to/joined to the other component, or a third component may be positioned between them. Identical drawing reference numerals refer to the same component. Furthermore, in the drawings, the thickness, proportions, and dimensions of components are exaggerated for the sake of effective technical explanation. "And/or" includes all one or more combinations that can define the related component. Terms such as "First," "Second," etc., can be used to describe various components, but the components are not limited by these terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the rights of this embodiment, the first component may be called the second component, and similarly, the second component may be called the first component. A singular expression includes plural expressions unless clearly indicated otherwise in the context. Terms such as "down," "on the lower side," "up," and "on the upper side" are used to describe the relationships between components shown in the drawing. These terms are relative concepts and are described in relation to the direction shown in the drawing. Terms such as "includes" or "possesses" are intended to indicate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not preemptively excluding the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Figure 1 is a plan view of a display device according to one embodiment. Figure 2 is a cross-sectional view taken along the line A-A' in Figure 1. Figure 3 is a cross-sectional view taken along the line B-B' in Figure 1. Referring to Figures 1 to 3, a display device 1 according to one embodiment includes a substrate 2, a first electrode 4, a light-emitting layer 5, and a cathode electrode 6. Multiple subpixels 21, 22, and 23 are formed on the substrate 2. These multiple subpixels 21, 22, and 23 can constitute a single pixel. Multiple pixels may be formed on the substrate 2. The multiple subpixels 21, 22, and 23 comprise a first subpixel 21, a second subpixel 22, and a third subpixel 23. By arranging the first subpixel 21, the second subpixel 22, and the third subpixel 23 in sequence, the second subpixel 22 may be adjacent to one side of the first subpixel 21, for example, its right side, and the third subpixel 23 may be adjacent to one side of the second subpixel 22, for example, its right side. Throughout this specification, the pl