KR-20260064885-A - DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME AND ELECTRONIC DEVICE

KR20260064885AKR 20260064885 AKR20260064885 AKR 20260064885AKR-20260064885-A

Abstract

A display device and a method for manufacturing the same are provided. A display device according to one embodiment may include a pixel electrode layer disposed on a substrate, a light-emitting element disposed on the pixel electrode layer and including a contact electrode, an organic layer covering a portion of the side of the light-emitting element and a portion of the pixel electrode layer exposed by the light-emitting element in an island pattern shape, a first reflective layer disposed on the side of the organic layer, and a protective layer protecting the light-emitting element, the organic layer, and the first reflective layer.

Inventors

이정안
이광근
서영교
윤소연

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (20)

Substrate; A pixel electrode layer disposed on the above substrate; A light-emitting element disposed on the pixel electrode layer and including a contact electrode; An organic layer having an island pattern shape, covering a portion of the side of the light-emitting element and a portion of the pixel electrode layer exposed by the light-emitting element; A first reflective layer disposed on the side of the above organic layer; and A protective layer protecting the light-emitting element, the organic layer, and the first reflective layer. A display device including
In Article 1, The above protective layer is, A first protective layer covering the upper and side surfaces of a light-emitting element and a pixel electrode layer where the light-emitting element is not placed; A second protective layer disposed on the upper surface of the organic layer and on the upper surface and side of the light-emitting element; and A display device comprising, on the second protective layer, the light-emitting element, the organic layer, and a third protective layer disposed on a substrate on which the organic layer is not disposed.
In Article 2, The second protective layer has a tip protruding outward from the upper surface of the organic layer, and The first reflective layer is a display device positioned at the bottom of the tip.
In Article 1, The above organic layer is a display device having a cross-section that is dome-shaped, rectangular, or trapezoidal.
In Article 1, The above organic layer is a display device having a shape that gradually narrows as it goes upward.
In Article 5, A display device having a side of the organic layer and a first reflective layer with an inclination angle in the range of 55° to 85°.
In Article 1, The above light-emitting element is, A conductive layer disposed on the lower surface of the first semiconductor layer, A first semiconductor layer disposed on the conductive layer and comprising a semiconductor material layer doped with a first conductive type dopant; An active layer disposed on the first semiconductor layer; and A second semiconductor layer disposed on the above active layer and comprising a semiconductor material layer doped with a second conductivity type dopant, and The above organic layer is a display device that surrounds the sides of the conductive layer, the first semiconductor layer, and the active layer.
In Article 7, The above light-emitting element is, A display device further comprising a third semiconductor layer, which is an undoped semiconductor layer disposed on the second semiconductor layer.
In Article 8, The above light-emitting element is, A display device further comprising a light extraction pattern having a concave pattern on the upper side.
In Article 7, The above contact electrode is A first contact electrode disposed on the protective layer and connected to the conductive layer exposed and not covered by the protective layer, and It includes a second contact electrode disposed on the protective layer and disposed in a hole penetrating the conductive layer and a part of the semiconductor stack, and The pixel electrode layer comprises pixel electrodes and a common electrode arranged spaced apart from each other. A display device in which the first contact electrode is connected to the pixel electrode and the second contact electrode is connected to the common electrode.
In Article 7, The pixel electrode layer above includes a pixel electrode, and A display device in which the above contact electrode is disposed on the pixel electrode and connected to the conductive layer exposed without being covered by the protective layer.
In Article 11, It further includes a common electrode disposed on top of the light-emitting element and the organic layer, and A display device in which the protective layer includes an opening that exposes at least a portion of the upper part of the light-emitting element, and the upper part of the light-emitting element is connected to the common electrode through the opening.
In Article 1, A partition wall positioned to surround the light-emitting element; and A display device further comprising a reflective layer disposed on the side of the above partition and on the bottom of the space formed by the above partition.
In Article 13, A display device further comprising a wavelength conversion layer disposed in the space formed by the above partition.
In Article 14, A display device further comprising a capping layer, an overcoat layer, and a color filter layer sequentially disposed on the wavelength conversion layer and the partition wall.
A step of forming a light-emitting device comprising a plurality of semiconductor layers, a conductive layer, a protective layer, and a contact electrode; A step of transferring the above light-emitting element onto a circuit board; A step of forming a first protective layer by applying a full coating on the side of the light-emitting element and on a circuit board where the light-emitting element is not placed; A step of forming an organic material layer covering the side of the light-emitting element, forming a protective material layer to cover the light-emitting element and the organic material layer, and patterning the protective material layer and the organic material layer to form an organic layer and a second protective layer; A step of forming a first reflective layer disposed on the side of a second organic layer by depositing a reflective material layer on the entire surface to cover the light-emitting element and the organic layer and dry etching; and Step of forming the above organic layer and a third protective layer surrounding the light-emitting elements A method for manufacturing a display device including
In Paragraph 16, In the step of forming the above organic layer and the second protective layer, A method for manufacturing a display device, wherein an organic layer is formed in an island pattern by dry etching on the above protective material layer using a hard mask, and a second protective layer having a tip protruding outward from the upper surface of the organic layer is formed.
In Paragraph 17, A method for manufacturing a display device in which the first reflective layer is disposed on the lower part of the protruding tip.
In Paragraph 16, The step of forming the light-emitting element is, A step of forming a second semiconductor material layer, an active material layer, a first semiconductor material layer, and a conductive material layer on a semiconductor substrate; A step of forming light-emitting devices each comprising a second semiconductor layer, an active layer, a first semiconductor layer, and a conductive layer by etching a second semiconductor layer, an active layer, a first semiconductor layer, and a conductive layer; A step of forming a hole penetrating the conductive layer, the first semiconductor layer, and the active layer in each of the above light-emitting elements; A step of forming a protective material layer surrounding each of the above-mentioned light-emitting elements, and patterning the protective material layer to form a protective film; and A method for manufacturing a display device comprising the steps of forming a mask pattern and forming a contact electrode on the protective film.
In Paragraph 16, A step of forming a partition that defines a light-emitting region; A wavelength conversion layer on the space formed by the above partition; and A method for manufacturing a display device further comprising the step of forming an overcoat layer and a color filter layer sequentially disposed on the above partition and the above wavelength conversion layer.

Description

Display device, method of manufacturing the same, and electronic device The present invention relates to a display device, a method of manufacturing the same, and an electronic device. As the information society develops, the demand for display devices to display images is increasing in various forms. Display devices may be flat panel displays such as Liquid Crystal Displays, Field Emission Displays, and Light Emitting Displays. The light-emitting display device may include an organic light-emitting display device comprising an organic light-emitting diode (OLED) as a light-emitting element, and a micro light-emitting display device comprising a micro light-emitting diode element (hereinafter referred to as a micro light-emitting element) as a light-emitting element. Since the micro light-emitting diode element is made of inorganic material, it has the advantage of having a long lifespan with fewer degradation issues compared to the organic light-emitting diode (OLED). FIG. 1 is a perspective view showing a display device according to one embodiment. FIG. 2 is a layout diagram showing a display device according to one embodiment. FIG. 3 is a block diagram showing a display device according to one embodiment. FIG. 4 is an equivalent circuit diagram showing a subpixel according to one embodiment. FIG. 5 is a layout diagram showing pixels of a display area according to one embodiment. FIG. 6 is a cross-sectional view showing an example of a cross-section of a display panel corresponding to the line I-I' of FIG. 5. Figure 7 is a cross-sectional view showing in detail an example of area A of Figure 6. Figure 8 is a cross-sectional view showing another example of the A1 region of Figure 6 in detail. Figure 9 is a cross-sectional view showing another example of the A1 region of Figure 6 in detail. FIG. 10 is a layout diagram showing pixels of a display area according to one embodiment. FIG. 11 is a cross-sectional view showing an example of a cross-section of a display panel corresponding to the line I1-I1' of FIG. 10. FIG. 12 is a cross-sectional view showing in detail an example of area A2 of FIG. 11. FIG. 13 is a flowchart showing a method for manufacturing a display device according to one embodiment. FIGS. 14 to 26 are exemplary drawings for explaining a method of manufacturing a display device according to one embodiment. FIG. 27 is an example drawing showing a smart watch including a display device according to one embodiment. FIGS. 28 and FIGS. 29 are exemplary drawings showing a virtual reality device including a display device according to one embodiment. FIG. 30 is an example drawing showing a virtual reality device including a display device according to another embodiment. FIG. 31 is an exemplary drawing showing an automobile instrument panel and center fascia including display devices according to one embodiment. FIG. 32 is an exemplary drawing showing a transparent display device including a display device according to one embodiment. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. When elements or layers are referred to as being "on" another element or layer, this includes cases where another layer or element is interposed directly on or in the middle of another element. Throughout the specification, the same reference numerals refer to the same components. Shapes, sizes, ratios, angles, numbers, etc., disclosed in the drawings for describing embodiments are exemplary and therefore the invention is not limited to the depicted details. The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship. Specific embodiments will be described below with reference to the attached drawings. FIG. 1 is a perspective view showing a display device according to one embodiment. Referring to FIG. 1, the display device (10) is a device for displaying video or still images and can be used as a display screen for various products such as televisions, laptops, monitors, billboards, and the Internet of Things (IOT), as well as portable electronic devices such as mobile phones, smartphones, tablet PCs, smart watches, watch phones, mobile communication terminals, electronic notebooks, electronic books, PMPs (portable multime