KR-20260062193-A - Display device

Abstract

An embodiment of the present invention discloses a display device comprising: a substrate; a first pixel driving circuit portion and a second pixel driving circuit portion disposed on the substrate so as to be spaced apart from each other; a first pad portion disposed on the first pixel driving circuit portion so as to be electrically connected to the first pixel driving circuit portion; a second pad portion disposed on the second pixel driving circuit portion so as to be electrically connected to the second pixel driving circuit portion; a first layer disposed on the first pad portion and the second pad portion so as to cover each of the first pad portion and the second pad portion; a first inorganic light-emitting diode disposed on the first layer so as to be electrically connected to the first pad portion; a second layer disposed on the first layer so as to cover the first inorganic light-emitting diode; and a second inorganic light-emitting diode disposed on the second layer so as to be electrically connected to the second pad portion.

Inventors

• 전형일
• 이규정
• 태창일

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260507

Application Date

20241025

Claims (20)

1. Substrate; A first pixel driving circuit part and a second pixel driving circuit part disposed on the substrate so as to be spaced apart from each other; A first pad portion disposed on the first pixel driving circuit portion so as to be electrically connected to the first pixel driving circuit portion; A second pad portion disposed on the second pixel driving circuit portion so as to be electrically connected to the second pixel driving circuit portion; A first layer disposed on the first pad portion and the second pad portion so as to cover each of the first pad portion and the second pad portion; A first inorganic light-emitting diode disposed on the first layer so as to be electrically connected to the first pad portion; A second layer disposed on the first layer to cover the first inorganic light-emitting diode; and A display device comprising: a second inorganic light-emitting diode disposed on the second layer so as to be electrically connected to the second pad portion.
2. In paragraph 1, A display device further comprising: a first connection portion received in a first connection opening penetrating the first layer to electrically connect the first pad portion and the first inorganic light-emitting diode.
3. In paragraph 1, A display device further comprising: a second connecting portion received in a second connecting opening penetrating each of the first layer and the second layer to electrically connect the second pad portion and the second inorganic light-emitting diode.
4. In paragraph 1, A display device in which the height of the second inorganic light-emitting diode from the substrate is higher than the height of the first inorganic light-emitting diode from the substrate.
5. In paragraph 1, A third pixel driving circuit portion disposed on the above substrate; A third pad portion disposed on the third pixel driving circuit portion so as to be electrically connected to the third pixel driving circuit portion; A third layer disposed on the second layer to cover the second inorganic light-emitting diode; and A display device further comprising: a third inorganic light-emitting diode disposed on the third layer so as to be electrically connected to the third pad portion.
6. In paragraph 5, A display device further comprising: a third connection portion received in a third connection opening penetrating each of the first layer, the second layer, and the third layer to electrically connect the third pad portion and the third inorganic light-emitting diode.
7. In paragraph 5, A display device further comprising: a fourth layer disposed on the third layer to cover the third inorganic light-emitting diode.
8. In paragraph 5, A display device in which the height of the third inorganic light-emitting diode from the substrate is higher than the height of the second inorganic light-emitting diode from the substrate.
9. In paragraph 1, A display device in which the first inorganic light-emitting diode and the second inorganic light-emitting diode emit light of different colors.
10. Substrate; A first pixel driving circuit part, a second pixel driving circuit part, and a third pixel driving circuit part disposed on the substrate so as to be spaced apart from each other; A first pad portion disposed on the first pixel driving circuit portion so as to be electrically connected to the first pixel driving circuit portion; A second pad portion disposed on the second pixel driving circuit portion so as to be electrically connected to the second pixel driving circuit portion; A third pad portion disposed on the third pixel driving circuit portion so as to be electrically connected to the third pixel driving circuit portion; A first layer disposed on the first pad portion, the second pad portion, and the third pad portion so as to cover each of the first pad portion, the second pad portion, and the third pad portion; A first inorganic light-emitting diode disposed on the first layer so as to be electrically connected to the first pad portion; A second layer disposed on the first layer to cover the first inorganic light-emitting diode; A second inorganic light-emitting diode disposed on the second layer so as to be electrically connected to the second pad portion; A third layer disposed on the second layer to cover the second inorganic light-emitting diode; and An electronic device comprising: a third inorganic light-emitting diode disposed on the third layer so as to be electrically connected to the third pad portion.
11. A step of arranging a first pixel driving circuit and a second pixel driving circuit on a substrate; A step of placing a first pad portion on the first pixel driving circuit portion so as to be electrically connected to the first pixel driving circuit portion; A step of placing a second pad portion on the second pixel driving circuit portion so as to be electrically connected to the second pixel driving circuit portion; A step of placing a first layer on the first pad portion and the second pad portion so as to cover each of the first pad portion and the second pad portion; A step of transferring a first inorganic light-emitting diode to the first pad portion; A step of placing a second layer on the first layer to cover the first inorganic light-emitting diode; and A method for manufacturing a display device comprising the step of transferring a second inorganic light-emitting diode to the second pad portion.
12. In Paragraph 11, The step of transferring the above-mentioned first inorganic light-emitting diode is, A step of placing the first inorganic light-emitting diode on the first wafer; A step of placing the first inorganic light-emitting diode on the first layer so that the first inorganic light-emitting diode is electrically connected to the first pad portion; and A method for manufacturing a display device comprising the step of removing the first wafer from the first inorganic light-emitting diode.
13. In Paragraph 12, The step of transferring the above-mentioned second inorganic light-emitting diode is, A step of placing the second inorganic light-emitting diode on the second wafer; A step of placing the second inorganic light-emitting diode on the second layer so that the second inorganic light-emitting diode is electrically connected to the second pad portion; and A method for manufacturing a display device comprising the step of removing the second wafer from the second inorganic light-emitting diode.
14. In Paragraph 13, A method for manufacturing a display device in which the first wafer and the second wafer are different.
15. In Paragraph 11, A step of forming a first connection opening that exposes the first pad portion in the first layer; and The method further includes the step of placing a first connecting portion comprising a conductive material in the first connecting opening; and A method for manufacturing a display device in which the first connecting portion electrically connects the first pad portion and the first inorganic light-emitting diode.
16. In Paragraph 11, A step of forming a second connecting opening that exposes the second pad portion to the first layer and the second layer; and The method further includes the step of placing a second connecting portion comprising a conductive material in the second connecting opening; and A method for manufacturing a display device in which the second connecting portion electrically connects the second pad portion and the second inorganic light-emitting diode.
17. In Paragraph 11, A step of placing a third pixel driving circuit on the above substrate; A step of placing a third pad portion on the third pixel driving circuit portion so as to be electrically connected to the third pixel driving circuit portion; A step of placing a third layer on the second layer to cover the second inorganic light-emitting diode; and The method further includes the step of transferring a third inorganic light-emitting diode to the third pad portion; The step of transferring the above-mentioned third inorganic light-emitting diode is, A step of placing the third inorganic light-emitting diode on the third wafer; A step of placing the third inorganic light-emitting diode on the third layer so that the third inorganic light-emitting diode is electrically connected to the third pad portion; and A method for manufacturing a display device comprising the step of removing the third wafer from the third inorganic light-emitting diode.
18. In Paragraph 17, A method for manufacturing a display device, further comprising the step of placing a fourth layer on the third layer to cover the third inorganic light-emitting diode.
19. In Paragraph 17, A step of forming a third connecting opening that exposes the third pad portion to the first layer, the second layer, and the third layer; and The method further includes the step of placing a third connecting portion comprising a conductive material in the third connecting opening; and A method for manufacturing a display device in which the third connecting part electrically connects the third pad part and the third inorganic light-emitting diode.
20. In Paragraph 17, A method for manufacturing a display device in which the height of the first inorganic light-emitting diode from the substrate, the height of the second inorganic light-emitting diode from the substrate, and the height of the third inorganic light-emitting diode from the substrate increase sequentially.

Description

Display device Embodiments of the present invention relate to a display device, such as a flexible display device. As display devices that visually display electrical signals advance, various display devices with excellent characteristics such as thinness, lightness, and low power consumption are being introduced. For example, flexible display devices that can be folded or rolled into a roll shape are being introduced. Recently, research and development on display devices of various structures, such as stretchable display devices that can change into various shapes, is actively underway. FIG. 1 is a schematic perspective view of a display device according to one embodiment of the present invention. FIGS. 2a and FIGS. 2b are perspective views showing the display device of FIG. 1 extended in a first direction. FIG. 2c is a perspective view showing the display device of FIG. 1 extended in a second direction. FIG. 2d is a perspective view showing the display device of FIG. 1 extended in the first direction and the second direction. FIG. 2e is a perspective view showing the display device of FIG. 1 extended in a third direction. FIG. 3 is a schematic plan view of a display device according to one embodiment of the present invention. FIG. 4a is a plan view of part IV of FIG. 3 as a part of a display device according to one embodiment of the present invention. FIG. 4b is a plan view of part IV of FIG. 3 as a part of a display device according to one embodiment of the present invention. FIG. 4c is a plan view of the IV portion of FIG. 3 as a part of a display device according to one embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing a first island portion and a first bridge portion disposed in the display area of a display device according to one embodiment of the present invention. FIGS. 6a to 6c are equivalent circuit diagrams of subpixels of a display device according to one embodiment of the present invention. FIG. 7a is a cross-sectional view schematically showing a light-emitting element of a display device according to one embodiment of the present invention. FIG. 7b is a cross-sectional view schematically showing a light-emitting element of a display device according to one embodiment of the present invention. FIG. 8a is an enlarged plan view of the first island portion of a display device according to one embodiment of the present invention, and FIG. 8b is a schematic plan view showing the arrangement of wiring on the first bridge portion of a display device according to one embodiment of the present invention. FIG. 9 is a cross-sectional view of a display device schematically showing a cross-section along the line I-I' of FIG. 8a and a cross-section along the line II-II' of FIG. 8b. FIGS. 10a and FIGS. 10b are flowcharts schematically illustrating a method for manufacturing a display device according to an embodiment of the present invention, and FIGS. 11 to 17 are cross-sectional views schematically illustrating a display device according to one embodiment of the present invention. FIGS. 18a to 18g are schematic perspective views illustrating embodiments of an electronic device including a display device according to one embodiment of the present invention. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects 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 drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the following embodiments, when a part such as a film, region, or component is described as being on or above another part, it includes not only cases where it is directly on top of another part, but also cases where another film, region, or component is interposed in between. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example,