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KR-102961578-B1 - DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

KR102961578B1KR 102961578 B1KR102961578 B1KR 102961578B1KR-102961578-B1

Abstract

A display device is provided. A display device according to one embodiment comprises at least: a first substrate including a first surface; a second substrate spaced apart from the first surface of the first substrate; a display element layer disposed on the first surface of the first substrate and spaced apart from the second substrate; a filling portion interposed in the spaced space between the first substrate and the second substrate; and a frit member connecting the edges of the first substrate and the second substrate, wherein the second substrate includes a second surface facing the first surface of the first substrate, and the second surface of the second substrate may have a surface modification region defined that is a fraction stronger than the filling portion.

Inventors

  • 김종우
  • 오소영
  • 윤종광
  • 정우석
  • 하재흥

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260507
Application Date
20211221

Claims (20)

  1. A first substrate including a first surface; A second substrate spaced apart from the first surface of the first substrate; A display element layer disposed on a first surface of the first substrate and spaced apart from the second substrate; A filling portion interposed in the spaced-apart space between the first substrate and the second substrate; and It includes a frit member connecting the edges of the first substrate and the second substrate, The second substrate includes a second surface facing the first surface of the first substrate, and The second surface of the second substrate has a surface modification region defined that has a higher degree of hydrophobicity than the filling portion, and The above surface modification region is a display device that completely covers the above display element layer.
  2. delete
  3. In Article 1, The surface modification region of the second surface is a display device surface modified with fluorine atoms.
  4. In Paragraph 3, The first substrate and the second substrate are a display device comprising glass.
  5. In Article 1, The above-mentioned filling portion is a display device that is in direct contact with the surface modification region of the display element layer and the second substrate.
  6. In Article 5, A display device comprising at least one of the following: a silicon-containing acrylate resin, a silicon-containing epoxy resin, a silicon-containing vinyl resin, or a silicon-containing phenyl resin.
  7. In Article 6, A display device having a refractive index of 1.4 or higher and 1.5 or lower for the above-mentioned filling portion.
  8. In Article 7, The above-mentioned filling part includes a platinum catalyst, A display device in which the platinum catalyst content of the above-mentioned filling part is 0.1% or more and 0.3% or less.
  9. In Article 1, The above frit member is a display device that surrounds the surface modification area and does not overlap with the surface modification area.
  10. In Article 9, The frit member is spaced apart from the display element layer, and The above-mentioned filling portion is a display device that completely covers the above-mentioned display element layer.
  11. In Article 10, The above-mentioned filling part is a display device that comes into direct contact with the above-mentioned frit member.
  12. In Article 11, The above-mentioned filling portion is a display device that completely fills the gap between the first substrate and the second substrate.
  13. A step of preparing a first substrate on which a display element layer is disposed on one side; Step of preparing a second substrate; A step of forming a surface modification region by applying a hydrophobic treatment to one side of the second substrate; A step of placing a frit member surrounding the surface modification region on one surface of the second substrate; After the step of placing the frit member, the step of applying a filling portion on the surface modification region of the second substrate; and The method includes the step of joining the first substrate and the second substrate such that one surface of the first substrate and one surface of the second substrate face each other. A method for manufacturing a display device in which the surface modification region completely covers the display element layer.
  14. In Article 13, A method for manufacturing a display device, wherein, in the step of forming a surface modification region by performing a hydrophobic treatment on one surface of the second substrate, the hydrophobic treatment is performed by a fluorine plasma treatment process.
  15. In Article 14, A method for manufacturing a display device in which the above-mentioned filling portion has weaker hydrophobicity than the above-mentioned surface modification region.
  16. In Article 13, A method for manufacturing a display device, wherein, in the step of applying a filling portion on the surface modification region of the second substrate, the filling portion is applied in the form of a dot.
  17. In Article 16, A method for manufacturing a display device in which, in the step of applying a filling portion on the surface modification region of the second substrate, the filling portion is in non-contact with the frit member.
  18. In Article 13, A method for manufacturing a display device, further comprising the step of irradiating a laser beam onto a frit member after the step of bonding the first substrate and the second substrate.
  19. In Article 18, A method for manufacturing a display device, comprising, after the step of irradiating a laser beam onto the frit member, a step of spreading the filling portion so as to come into contact with the frit member.
  20. In Article 19, A method for manufacturing a display device, further comprising the step of curing the filling portion after the step of spreading the filling portion to contact the frit member.

Description

Display device and method of manufacturing the same The present invention relates to a display device and a method for manufacturing the same. The importance of display devices is gradually increasing with the development of multimedia. In response to this, various display devices such as Liquid Crystal Display Devices (LCDs) and Organic Light Emitting Diode Display Devices (OLEDs) are being developed. Among the display devices, the self-luminous display device includes a self-luminous element, for example, an organic light-emitting element. The self-luminous element may include two opposing electrodes and a light-emitting layer interposed between them. When the self-luminous element is an organic light-emitting element, electrons and holes provided from the two electrodes recombine in the light-emitting layer to generate excitons, and light may be emitted as the generated excitons change from an excited state to a ground state. Self-emissive display devices are attracting attention as next-generation display devices because they do not require light sources such as backlight units, allowing for low power consumption and lightweight, thin designs, as well as high-quality characteristics such as wide viewing angles, high brightness and contrast, and fast response speeds. FIG. 1 is a perspective view schematically illustrating a display device according to one embodiment. Figure 2 is a schematic cross-sectional view showing a cross-section cut along the line X1-X1' of Figure 1. Figure 3 is an enlarged view of the Q1 region of Figure 2. Figure 4 is an enlarged view of the Q2 region of Figure 2. Figure 5 is a schematic diagram illustrating the structure of the surface modification region of the encapsulation substrate. FIGS. 6 to 20 are drawings for explaining a method of manufacturing a display device according to one embodiment. FIG. 21 is a schematic diagram illustrating the structure of a display device according to another embodiment. FIG. 22 is a schematic diagram illustrating the structure of a display device according to another 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 an element or layer is referred to as "above" another element or layer, it includes cases where another layer or element is interposed directly above or in the middle of another element. Likewise, when referred to as "below," "left," and "right," they include cases where they are interposed immediately adjacent to another element or where another layer or material is interposed in the middle. Throughout the specification, the same reference numerals refer to the same components. Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be the second component within the technical scope of the present invention. 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 schematically illustrating a display device according to one embodiment. Referring to FIG. 1, a display device (1) according to one embodiment may be applied to portable electronic devices such as a mobile phone, a smartphone, a tablet PC, a mobile communication terminal, an electronic notebook, an e-book, a PMP (portable multimedia player), a navigation system, a UMPC (Ultra Mobile PC), etc. Alternatively, a display device (1) according to one embodiment may be applied to a television, a laptop, a monitor, an advertising board, or a display unit of the Internet of Things (IOT). These are merely examples presented, and it goes without saying that they may be adopted in other electronic devices as long as they do not deviate from the concept of the present invention. The display device (1) has a three-dimensional shape. For example, the display device (1) may have a rectangular prism or a similar three-dimensional shape. In the drawings, the direction parallel to the first side o