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KR-102961586-B1 - DISPLAY MODULE AND MANUFACTURING METHOD OF THE SAME

KR102961586B1KR 102961586 B1KR102961586 B1KR 102961586B1KR-102961586-B1

Abstract

A display module according to one embodiment of the present invention comprises: a base layer including a first portion having a light-emitting element, a second portion connected to a circuit board, and a third portion bent and disposed between the first portion and the second portion; a light-emitting element layer superimposed on the first portion and disposed on the upper surface of the first portion; a protective film disposed on the lower surface of the base layer and having an opening defined superimposed on the third portion; and a first protective layer disposed on the lower surface of the third portion and superimposed on the opening; wherein the modulus of the first protective layer is 10⁶ Pa or greater.

Inventors

  • 조윤정
  • 이대우
  • 채경훈
  • 황현득
  • 류도형

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260508
Application Date
20210825

Claims (20)

  1. A base layer comprising a first portion having a light-emitting element, a second portion connected to a circuit board, and a third portion disposed between the first portion and the second portion and bent; A light-emitting element layer superimposed on the first portion and disposed on the upper surface of the first portion; A protective film disposed on the lower surface of the base layer and having an opening defined that overlaps the third portion; and A first protective layer disposed on the lower surface of the third part and superimposed on the opening; comprising, The modulus of the first protective layer is 10⁶ Pa or greater, and The above protective film includes a first protective film overlapping the first portion and a second protective film spaced apart from the first protective film and overlapping the second portion. The first protective film and the second protective film define the opening, and It further includes a support panel disposed between the first protective film and the second protective film and spaced apart from the first protective layer, A display module in which the side of the first protective film defining the opening and the side of the second protective film are each covered by the first protective layer.
  2. In Article 1, The first protective layer comprises at least one of an acrylic resin, an epoxy resin, and a silicone resin, in a display module.
  3. In Article 1, A display module further comprising a second protective layer disposed on the upper surface of the third part.
  4. A preparation step for providing a base layer comprising a first part, a second part, and a third part disposed between the first part and the second part and having flexibility; A device layer step of providing a light-emitting element on the upper surface of the first portion; A coating step of providing a resin composition to the lower surface of the third part above; A first curing step of curing the above resin composition by a first method to form a first cured product; A second curing step comprising curing the first cured product by a second method different from the first method to form a second cured product; Between the first curing step and the second curing step, the method further includes a bending step of bending the third part so that the lower surface of the first part and the lower surface of the second part face each other. The resin composition comprises a first reactant activated by the first method and a second reactant activated by the second method, and The first method above is UV curing, and The above second method is heat curing or natural curing, and The first reactant above includes a photoinitiator or a latent catalyst, and A method for manufacturing a display module comprising the above-mentioned second reactant, a thermal initiator, a material containing an isocyanate group, or a silicone-based material.
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  6. In Paragraph 4, A method for manufacturing a display module in which the modulus of the first cured product is lower than the modulus of the second cured product.
  7. In Paragraph 4, A method for manufacturing a display module in which the modulus of the resin composition is 10³ Pa or less.
  8. In Paragraph 4, A method for manufacturing a display module in which the modulus of the first cured product is 10⁴ Pa or less.
  9. In Paragraph 4, A method for manufacturing a display module in which the modulus of the second cured product is 10⁶ Pa or higher.
  10. In Paragraph 4, Between the above device layer step and the above coating step, the method further includes the step of providing signal lines to the first part, the second part, and the third part. A method for manufacturing a display module in which the above signal lines overlap at least a portion of the above second cured material.
  11. In Paragraph 4, Prior to the above coating step, the method further includes the step of providing a protective film under the base layer, and The above protective film has an opening defined that overlaps at least a portion of the above third part, and A method for manufacturing a display module in which the resin composition is provided within the opening in the above coating step.
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  15. In Paragraph 4, The first reactant further comprises an acrylic monomer and an acrylic oligomer, and the photoinitiator is an acrylic radical photoinitiator. A method for manufacturing a display module comprising a urethane-based material containing an isocyanate group as the second reactant.
  16. In Paragraph 4, The first reactant further comprises an acrylic monomer and an acrylic oligomer, and the photoinitiator is an acrylic radical photoinitiator. A method for manufacturing a display module in which the second reactant further comprises an epoxy monomer and an epoxy oligomer, and the thermal initiator is an epoxy anionic thermal initiator.
  17. In Paragraph 4, The first reactant further comprises an acrylic monomer and an acrylic oligomer, and the photoinitiator is an acrylic radical photoinitiator. A method for manufacturing a display module in which the second reactant further comprises an acrylic monomer and an acrylic oligomer, and the thermal initiator is an acrylic thermal initiator.
  18. In Paragraph 4, The first reactant further comprises an epoxy monomer and an epoxy oligomer, and the photoinitiator is an epoxy cationic photoinitiator. A method for manufacturing a display module in which the second reactant further comprises an epoxy monomer and an epoxy oligomer, and the thermal initiator is an epoxy cationic thermal initiator.
  19. In Paragraph 4, The first reactant above includes a potential catalyst and further includes an inhibitor, A method for manufacturing a display module comprising the above second reactant, a silicon-based monomer, and a silicon-based oligomer.
  20. In Paragraph 4, A method for manufacturing a display module, further comprising the step of providing a circuit board to the second portion prior to the above coating step.

Description

Display Module and Manufacturing Method of the Same The present invention relates to a display module and a method for manufacturing a display module. More specifically, it relates to a display module with improved durability and rigidity of a bending portion and a method for manufacturing the same. Recently, various display devices have been becoming thinner, smaller, and lighter. Accordingly, various studies are being conducted to mount driving elements for displaying images on the display device within a limited area. The display device may be provided in a form in which driving elements for displaying images are directly mounted on the display panel, or in a form in which a circuit board on which driving elements are mounted is connected to the display panel. Display panels or circuit boards are at risk of cracking or damage due to tensile forces generated during bending, which may occur during repeated bending or the process of joining in a bent state. FIG. 1 is a combined perspective view of a display device according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a display device according to one embodiment of the present invention. FIG. 3 is a perspective view of a display module according to one embodiment of the present invention. FIG. 4 is a perspective view showing a part of the display module shown in FIG. 3 bent. FIG. 5 is a cross-sectional view of a display module according to one embodiment of the present invention. FIG. 6 is a cross-sectional view of a display module according to one embodiment of the present invention. FIG. 7 is a plan view of a display panel according to one embodiment of the present invention. FIG. 8 is a flowchart showing the steps of a method for manufacturing a display module according to one embodiment of the present invention. FIGS. 9a to 9h are cross-sectional views sequentially illustrating each step of a method for manufacturing a display module according to an embodiment of the present invention. FIG. 10 is a graph showing the modulus value of the first protective layer according to each step of the method for manufacturing a display module according to one embodiment of the present invention. Embodiments of the present invention will be described below with reference to the drawings. In this specification, where a component (or region, layer, part, etc.) is described as being "on," "connected," or "joined" to another component, it means that it may be directly connected/joined to the other component or that a third component may be placed between them. Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of the components are exaggerated for the effective illustration of the technical content. "And/or" includes all one or more combinations that the associated components may define. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, 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. Additionally, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings. Terms such as "include" or "have" 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. In this specification, "the configuration of B is placed directly on the configuration of A" means that no separate adhesive layer or adhesive member is placed between the configuration of A and the configuration of B. Hereinafter, a display module according to an embodiment of the present invention and a display device including the same will be described with reference to the drawings. FIG. 1 is an assembled perspective view of a display device according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a display device according to one embodiment of the present invention. Referring to FIGS. 1 and 2, the display device (EA) may be a device that is activated by an electrical signal. The display device (EA) may include various embodiments. For example, the display device (EA) may be used in large electronic devices such as televisions, monitors, or external billboards, as well as in small and medium-s