KR-20260065052-A - DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME AND ELECTRONIC DEVICE

Abstract

A display device, a method for manufacturing the same, and an electronic device are provided. A display device according to one embodiment comprises a substrate, a pixel electrode and a common electrode disposed on the substrate and spaced apart from each other, a light-emitting element including a first contact electrode in contact with the pixel electrode and a second contact electrode in contact with the common electrode, a first repair bonding material disposed between the pixel electrode and the first contact electrode, and a second repair bonding material disposed between the common electrode and the second contact electrode, wherein the volume of the second repair bonding material is larger than the volume of the first repair bonding material, and the first repair bonding material and the second repair bonding material may be made of an organic material including conductive particles.

Inventors

• 김현원
• 노종덕
• 신미향
• 김태규
• 이재한

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20241031

Claims (20)

1. Substrate; Pixel electrodes and common electrodes disposed on the above substrate and spaced apart from each other; A light-emitting element comprising a first contact electrode in contact with the pixel electrode and a second contact electrode in contact with the common electrode; A first repair bonding material disposed between the pixel electrode and the first contact electrode; and It includes a second repair bonding material disposed between the common electrode and the second contact electrode. The volume of the second repair bonding material is larger than the volume of the first repair bonding material, and A display device comprising the first repair bonding material and the second repair bonding material, which are organic materials containing conductive particles.
2. In Article 1, A display device in which the volume of the second repair bonding material is 1.1 to 3.0 times the volume of the first repair bonding material.
3. A display device according to claim 1, wherein the conductive particles are particles formed of conductive metal or carbon black.
4. In Article 1, The above light-emitting element is, Semiconductor stack; A conductive layer disposed on one side of the semiconductor stack; and It further includes a protective film disposed on the sides and one side of the conductive layer and on the sides of the semiconductor stack, and The first contact electrode is disposed on the protective film and is connected to the conductive layer that is exposed and not covered by the protective film, and The second contact electrode is disposed on the protective film and is disposed in a hole penetrating the conductive layer and a part of the semiconductor stack, and The above second repair bonding material is a marking device that fills the above hole.
5. In Paragraph 4, The above semiconductor stack is, 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 display device further comprising a second semiconductor layer disposed on the active layer and comprising a semiconductor material layer doped with a second conductivity type dopant.
6. In Article 5, The above semiconductor stack is, A display device further comprising a third semiconductor layer, which is an undoped semiconductor layer disposed on the second semiconductor layer.
7. In Article 6, The above semiconductor stack is a display device further comprising a light extraction pattern having a concave pattern on the upper side.
8. In Article 1, A display device further comprising an organic layer disposed between the pixel electrode and the common electrode.
9. In Article 8, The above organic layer is a display device that is not disposed on the pixel electrode and the common electrode.
10. In Article 5, The above hole is a display device that penetrates a conductive layer, a first semiconductor layer, and an active layer to expose a second semiconductor layer.
11. In Article 10, The above second repair bonding material is a display device that fills a higher portion of the active layer within the hole.
12. A step of transferring light-emitting elements onto pixel electrodes and a common electrode; A step of inspecting the lighting status of a plurality of light-emitting elements and removing defective light-emitting elements; and A step of bonding a repair light-emitting element to the site where the defective light-emitting element was removed using a repair bonding material. Includes, The above repair bonding material is applied to the pixel electrode and the common electrode, wherein the amount of the first repair bonding material applied to the pixel electrode and the amount of the second repair bonding material placed on the common electrode are different. A method for manufacturing a display device in which the first repair bonding material and the second repair bonding material are organic materials containing conductive particles.
13. In Paragraph 12, The step of bonding a repair light-emitting element to the site where the defective light-emitting element was removed using the repair bonding material is: A method for manufacturing a display device by applying a repair bonding material to the first pixel electrode to a first height using a dispenser or inkjet, and applying it to the first common electrode to a second height, wherein the second height is higher than the first height.
14. In Paragraph 13, The above-mentioned maintenance light-emitting element is, Semiconductor stack; A conductive layer disposed on one side of the above semiconductor stack; A protective film disposed on the sides and one side of the conductive layer and on the sides of the semiconductor stack; A first contact electrode disposed on the protective film and connected to the conductive layer exposed and not covered by the protective film; and It includes a second contact electrode disposed on the protective film and disposed in a hole penetrating the conductive layer and a part of the semiconductor stack, and A method for manufacturing a display device by aligning the first contact electrode on the first repair bonding material and aligning the second contact electrode on the second repair bonding material, thereby bonding the repair light-emitting element onto the pixel electrode and the common electrode.
15. In Paragraph 14, A method for manufacturing a display device in which the above-mentioned second repair bonding material fills the above-mentioned hole.
16. In Paragraph 12, A method for manufacturing a display device in which the amount of the second repair bonding material applied is 1.1 to 3.0 times the amount of the first repair bonding material applied.
17. In Paragraph 12, A method for manufacturing a display device in which the conductive particles are particles formed of conductive metal or carbon black.
18. In Paragraph 12, The step of transferring light-emitting elements onto the pixel electrode and the common electrode is, An organic layer is formed on the pixel electrode and the common electrode, and A light-emitting element is placed on the above organic layer, and A method for manufacturing a display device that forms a first connecting electrode connecting a first contact electrode and a pixel electrode, and a second connecting electrode connecting a second contact electrode and a common electrode.
19. In Paragraph 12, The step of transferring light-emitting elements onto the pixel electrode and the common electrode is, A method for manufacturing a display device by contacting the light-emitting elements on the pixel electrode and the common electrode using a bonding metal.
20. A method for manufacturing a display device according to claim 12, wherein the defective light-emitting element is removed using a vacuum chuck, an electrostatic device, an electromagnetic device, or an adhesive stamp.

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 element 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 organic light-emitting diode elements. 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 in detail an example of area B of Figure 6. FIG. 9 is a cross-sectional view showing another example of a cross-section of a display panel corresponding to the line I1-I1' of FIG. 5. FIG. 10 is a cross-sectional view showing another example of area A2 of FIG. 9 in detail. FIG. 11 includes the repair light-emitting element and repair bonding material of FIG. 9. FIG. 12 is a flowchart showing a method for manufacturing a display device according to one embodiment. FIGS. 13 to 19 are exemplary drawings for explaining a method of manufacturing a display device according to one embodiment. FIG. 20 is a graph showing the magnitude of the current versus the voltage of a light-emitting element bonded using a repair bonding material according to one embodiment. Figure 21 is a graph showing the magnitude of the current versus the voltage of a light-emitting device bonded using a conventional bonding metal. FIG. 22 is an image of a repair light-emitting element using a repair bonding material according to one embodiment. Figure 23 is an image of a repair light-emitting element using a conventional bonding metal. FIG. 24 is an example drawing showing a smart watch including a display device according to one embodiment. FIGS. 25 and FIGS. 26 are exemplary drawings showing a virtual reality device including a display device according to one embodiment. FIG. 27 is an example drawing showing a virtual reality device including a display device according to another embodiment. FIG. 28 is an exemplary drawing showing an automobile instrument panel and center fascia including display devices according to one embodiment. FIG. 29 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