KR-20260065701-A - DISPLAY DEVICE, DISPLAY SYSTEM INCLUDING DISPLAY DEVICE, AND METHOD OF MANUFACTURING DISPLAY DEVICE

KR20260065701AKR 20260065701 AKR20260065701 AKR 20260065701AKR-20260065701-A

Abstract

A display device according to an embodiment of the present disclosure comprises: a first subpixel; a second subpixel; and a third subpixel; a substrate; sidewalls disposed on the substrate; an anode electrode disposed on the substrate; a first light-emitting structure disposed on the anode electrode of the first subpixel; a second light-emitting structure disposed on the anode electrode of the second subpixel; a third light-emitting structure disposed on the anode electrode of the third subpixel; a cathode electrode disposed on the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and a capping layer disposed on the cathode electrode, wherein each of the sidewalls comprises: a first sidewall; and a second sidewall disposed on the first sidewall and having a width greater than that of the first sidewall, and the capping layer may not overlap with at least one of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure when viewed in a plane.

Inventors

박희민
김아롱
김재익
문영민
양희준
이사민
조원제

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260511
Application Date: 20241101

Claims (20)

1st subpixel; 2nd subpixel; and 3rd subpixel; Substrate; Sidewalls disposed on the above substrate; An anode electrode disposed on the above substrate; A first light-emitting structure disposed on the anode electrode of the first subpixel; A second light-emitting structure disposed on the anode electrode of the second subpixel; A third light-emitting structure disposed on the anode electrode of the third subpixel; A cathode electrode disposed on the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and It includes a capping layer disposed on the above cathode electrode, Each of the above side walls is: First side wall; and It includes a second side wall disposed on the first side wall and having a width greater than that of the first side wall, A display device in which the capping layer is not superimposed with at least one of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure when viewed in a plane.
In Article 1, It further includes a pixel definition layer disposed below the above side walls, and The pixel definition layer exposes at least a portion of the anode electrode, and A display device wherein the above side walls are disposed between each of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure.
In Article 1, The above anode electrode is a display device disposed on the sidewalls.
In Paragraph 3, It further includes a pixel definition layer surrounding the anode electrode, and The pixel definition layer is disposed on the second sidewall, and A display device in which the anode electrode has a smaller area in a plane than the second sidewall.
In Paragraph 3, The above cathode electrode is: A first cathode electrode in contact with the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and A display device comprising a second cathode electrode disposed on the first cathode electrode.
In Article 5, The second cathode electrode comprises a transparent conductive oxide (TCO), and The second cathode electrode above is a display device that surrounds the second sidewall.
In Article 5, The capping layer has a first transmittance and a first refractive index with respect to light in the visible light region, The second cathode electrode has a second transmittance and a second refractive index with respect to light in the visible light region, and The first transmittance is 0.9 to 1.1 times the second transmittance, and A display device in which the first refractive index is 0.9 to 1.1 times the second refractive index.
In Article 5, A display device in which the capping layer is not superimposed with one of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure when viewed in a plane, and superimposed with two of them when viewed in a plane.
In Article 5, A display device in which the capping layer is non-overlapping with two of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure when viewed in a plane, and overlaps with one of them when viewed in a plane.
In Article 1, It further includes a sealing layer disposed on the capping layer, and A display device in which the capping layer is in contact with the bag layer.
In Article 1, The first subpixel above provides light in a wavelength band of 600nm to 750nm, and The second subpixel above provides light in a wavelength band of 80nm to 560nm, and The third subpixel above provides light in a wavelength band of 370nm to 460nm, and The capping layer, when viewed in a planar view, overlaps with the first light-emitting structure and the second light-emitting structure, and does not overlap with the third light-emitting structure. A display device comprising the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure, wherein the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure comprise an organic light-emitting material.
1st subpixel; 2nd subpixel; and 3rd subpixel; Substrate; Sidewalls disposed on the above substrate; An anode electrode disposed on the above substrate; A first light-emitting structure disposed on the anode electrode of the first subpixel; A second light-emitting structure disposed on the anode electrode of the second subpixel; A third light-emitting structure disposed on the anode electrode of the third subpixel; and It includes a cathode electrode disposed on the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure, and Each of the above side walls is: First side wall; and It includes a second side wall disposed on the first side wall and having a width greater than that of the first side wall, The above cathode electrode is: A first cathode electrode in contact with the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and It includes a second cathode electrode disposed on the first cathode electrode, and A display device in which, in each of the regions overlapping with the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure, the second cathode electrode has a different thickness.
In Article 12, It further includes a sealing layer disposed on the second cathode electrode, and The above second cathode electrode is a display device in contact with the above encapsulation layer.
In Article 13, It further includes a pixel definition layer disposed below the above side walls, and The pixel definition layer exposes at least a portion of the anode electrode, and A display device wherein the above side walls are disposed between each of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure.
In Article 13, It further includes a pixel definition layer surrounding the anode electrode, and The anode electrode and the pixel defining layer are disposed on the second sidewall, and A display device in which the anode electrode has a smaller area in a plane than the second sidewall.
Step of forming sidewalls on a substrate; A step of forming a first light-emitting element disposed in a first subpixel area; A step of forming a second light-emitting element disposed in a second subpixel area; A step of forming a third light-emitting element disposed in a third subpixel area; and The method includes the step of forming a capping layer on a portion of the first light-emitting element, the second light-emitting element, and the third light-emitting element. The step of forming the first light-emitting element includes the step of forming the first light-emitting structure, and The step of forming the second light-emitting element includes the step of forming a second light-emitting structure, and The step of forming the third light-emitting element includes the step of forming a third light-emitting structure, and Each of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure is formed in a different process, and Each of the above side walls is: First side wall; and It is formed to include a second side wall disposed on the first side wall and having a width greater than that of the first side wall, and A method for manufacturing a display device, wherein the capping layer overlaps only with some of the first light-emitting element, the second light-emitting element, and the third light-emitting element when viewed in a planar manner.
In Article 16, Each of the steps of forming the first light-emitting element, forming the second light-emitting element, and forming the third light-emitting element is: Each further includes the step of forming a cathode electrode, and The above cathode electrode is: A first cathode electrode in contact with the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and It includes a second cathode electrode disposed on the first cathode electrode, and A method for manufacturing a display device, wherein, when viewed in a planar view, the capping layer overlaps with one or two of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure.
In Article 17, The method includes the step of forming anode electrodes on the substrate, A method for manufacturing a display device in which the anode electrodes are formed on the sidewalls.
processor; and A display device comprising pixels and configured to display an image on the pixels according to the control of the processor, The above display device is: 1st subpixel; 2nd subpixel; and 3rd subpixel; Substrate; Sidewalls disposed on the above substrate; An anode electrode disposed on the above substrate; A first light-emitting structure disposed on the anode electrode of the first subpixel; A second light-emitting structure disposed on the anode electrode of the second subpixel; A third light-emitting structure disposed on the anode electrode of the third subpixel; A cathode electrode disposed on the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and It includes a capping layer disposed on the above cathode electrode, Each of the above side walls is: First side wall; and It includes a second side wall disposed on the first side wall and having a width greater than that of the first side wall, A display system in which the capping layer is non-overlapping with at least one of the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure when viewed in a plane.
processor; and A display device comprising pixels and configured to display an image on the pixels according to the control of the processor, The above display device is: 1st subpixel; 2nd subpixel; and 3rd subpixel; Substrate; Sidewalls disposed on the above substrate; An anode electrode disposed on the above substrate; A first light-emitting structure disposed on the anode electrode of the first subpixel; A second light-emitting structure disposed on the anode electrode of the second subpixel; A third light-emitting structure disposed on the anode electrode of the third subpixel; and It includes a cathode electrode disposed on the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure, and Each of the above side walls is: First side wall; and It includes a second side wall disposed on the first side wall and having a width greater than that of the first side wall, The above cathode electrode is: A first cathode electrode in contact with the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure; and It includes a second cathode electrode disposed on the first cathode electrode, and A display system in which, in each of the regions overlapping with the first light-emitting structure, the second light-emitting structure, and the third light-emitting structure, the second cathode electrode has a different thickness.

Description

Display device, display system including display device, and method of manufacturing display device The present disclosure relates to a display device, a display system including a display device, and a method for manufacturing a display device. With the advancement of information technology, the importance of display devices, which serve as a medium connecting users and information, is being highlighted. Accordingly, research and development on display devices is continuously being carried out. Organic light-emitting diodes (OLEDs) are active light-emitting display devices that have the advantages of a wide viewing angle, excellent contrast, the ability to be driven at low voltage, and fast response speed. The display device may include a plurality of layers, and light emitted by an organic light-emitting diode may pass through the plurality of layers and be provided to the outside. Accordingly, the plurality of layers included in the display device may change the optical characteristics of the output light. FIG. 1 is a schematic plan view showing a display device according to an embodiment. FIG. 2 is a schematic exploded perspective view showing a display device according to an embodiment. FIG. 3 is a plan view showing an example of any one of the pixels of FIG. 2. FIG. 4 is a plan view showing another embodiment of any one of the pixels of FIG. 2. FIG. 5 is a plan view showing another embodiment of any one of the pixels of FIG. 2. FIG. 6 is a schematic cross-sectional view showing a display device according to an embodiment. FIG. 7 is a schematic cross-sectional view showing a light-emitting structure according to an embodiment. FIG. 8 is a schematic cross-sectional view showing a display device according to an embodiment. FIG. 9 is a graph showing the experimental results of relative light efficiency for each subpixel according to an embodiment. FIG. 10 is a schematic cross-sectional view showing a cathode electrode and an encapsulation layer according to an embodiment. FIG. 11 is a flowchart illustrating a method for manufacturing a display device according to an embodiment. FIG. 12 is a block diagram showing an example of a display system. FIG. 13 is a perspective view showing an application example of the display system of FIG. 12. Figure 14 is a drawing showing a head-mounted display device worn by the user of Figure 13. FIG. 15 is a block diagram showing an embodiment of a display system including the display device of FIG. 1. FIG. 16 is a perspective view showing an example of a smartphone that can be implemented using the display system of FIG. 15. FIG. 17 is a perspective view showing an example of a tablet computer that can be implemented using the display system of FIG. 15. The present disclosure is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present disclosure to specific forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present disclosure. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this disclosure, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Furthermore, when a part such as a layer, film, region, or plate is described as being "on" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Additionally, in this specification, when a part such as a layer, film, region, or plate is described as being formed "on" another part, the direction in which it is formed is not limited to the upward direction only, but includes cases where it is formed in the lateral or downward direction. Conversely, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. The present disclosure relates to a display device, a display system including a display device, and a method for manufacturing a display device. Hereinafter, a dis