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US-20260130094-A1 - DISPLAY DEVICE

US20260130094A1US 20260130094 A1US20260130094 A1US 20260130094A1US-20260130094-A1

Abstract

A display device according to an embodiment of the present disclosure may include a display module, a side frame configured to support a part of a lateral portion of the display module, at least one fixation part coupled to the side frame and configured to press one surface of the display module and fix the display module to the side frame. The display device further includes a connection module inserted into a rear surface of the fixation part, the connection module having a plurality of connection lines configured to electrically connect components of the display module. This structure reduces or eliminates the need for adhesives, thereby improving heat dissipation efficiency and conduction performance.

Inventors

  • Hyo-Sup Eum
  • HeeDong Lee

Assignees

  • LG DISPLAY CO., LTD.

Dates

Publication Date
20260507
Application Date
20250422
Priority Date
20241105

Claims (20)

  1. 1 . A display device comprising: a display module including a lateral portion; a side frame configured to support a part of the lateral portion of the display module; at least one fixation part coupled to the side frame and configured to press one surface of the display module and fix the display module to the side frame; and a connection module inserted into a rear surface of the fixation part and being provided with a plurality of connection lines configured to couple components of the display module.
  2. 2 . The display device of claim 1 , wherein the fixation part comprises: a holder frame coupled to the side frame; a holder rod coupled to the holder frame; and a pressing member coupled to the holder rod and configured to press one surface of the display module.
  3. 3 . The display device of claim 2 , wherein the pressing member comprises: a coupling member having a guide hole provided in a lateral portion thereof, the coupling member being configured to move along an inclination of the guide hole when an external force is applied to the pressing member; an extension member extending from one end of the coupling member in a direction in which the display module is positioned; and a pressing plate extending perpendicularly from an extending end of the extension member and configured to selectively press the display module in accordance with a change in position, and wherein the connection module is inserted into a rear surface of the pressing plate.
  4. 4 . The display device of claim 3 , wherein the connection module comprises: a bottom surface; and sidewalls perpendicularly extending from the bottom surface.
  5. 5 . The display device of claim 4 , wherein the sidewall adjacent to the side frame among the sidewalls constitutes a guide portion inclined inward, wherein the sidewall opposite the guide portion among the sidewalls constitutes an elastic portion, and wherein an elastic member is interposed between the elastic portion and the pressing plate.
  6. 6 . The display device of claim 1 , wherein the connection module comprises: a filling layer; and the plurality of connection lines disposed in the filling layer.
  7. 7 . The display device of claim 6 , wherein the connection lines comprise: wiring portions arranged side by side in one direction; and contact portions extending from ends of the wiring portions in a perpendicular direction.
  8. 8 . The display device of claim 7 , wherein the filling layer is made of resin and comprises a first filling layer positioned relatively inward based on the connection line, and a second filling layer positioned relatively outward based on the connection line, and wherein the first filling layer and the second filling layer are configured to surround the connection line, except for an end of the contact portion.
  9. 9 . The display device of claim 3 , wherein the display module comprises: a display panel; an encapsulation part configured to cover one surface of the display panel; a heat dissipation plate disposed above the encapsulation part; a chip-on-film (COF) disposed above the heat dissipation plate; and a drive integrated circuit (IC) mounted on the COF.
  10. 10 . The display device of claim 9 , wherein the display module further comprises a printed circuit board disposed above the heat dissipation plate and spaced apart from the COF.
  11. 11 . The display device of claim 9 , wherein the connection line couples a pad of the display panel and an output pad of the COF.
  12. 12 . The display device of claim 10 , wherein the connection line couples the COF and the printed circuit board.
  13. 13 . The display device of claim 10 , further comprising: a first accommodation groove provided in the rear surface of the pressing plate and configured to accommodate the drive IC; and a second accommodation groove configured to accommodate the printed circuit board.
  14. 14 . The display device of claim 3 , wherein the display module comprises: a display panel; a drive IC mounted on the display panel; an encapsulation part configured to cover one surface of the display panel, except for the drive IC; and a heat dissipation plate disposed above the encapsulation part.
  15. 15 . The display device of claim 14 , wherein the display module further comprises a printed circuit board disposed above the heat dissipation plate, and wherein the connection line couples the display panel and the printed circuit board.
  16. 16 . The display device of claim 3 , wherein the display module comprises: a display panel; an encapsulation part configured to cover one surface of the display panel, except for a drive IC; a heat dissipation plate disposed above the encapsulation part; a printed circuit board disposed above the heat dissipation plate; and the drive IC mounted on the printed circuit board, wherein the connection line couples the display panel and the printed circuit board.
  17. 17 . The display device of claim 1 , wherein the plurality of connection lines comprises a plurality of first connection lines and a plurality of second connection lines having different lengths, wherein the first connection lines comprise: first wiring portions arranged side by side in one direction; and first contact portions extending from ends of the first wiring portions in a perpendicular direction, and wherein the second connection lines comprise: second wiring portions arranged side by side in one direction; and second contact portions extending from ends of the second wiring portions in a perpendicular direction.
  18. 18 . The display device of claim 17 , wherein the first wiring portion has a longer length than the second wiring portion, and the second contact portion has a longer length than the first contact portion.
  19. 19 . The display device of claim 1 , further comprising a buckling suppression part configured to apply pressure to a central portion of the fixation part to prevent deformation of the display module.
  20. 20 . The display device of claim 7 , wherein at least one contact portion is inclined or curved, and wherein, in operation, enhances electrical connectivity under mechanical pressure.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the priority of Korean Patent Application No. 10-2024-0155479 filed on Nov. 5, 2024, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. BACKGROUND Technical Field The present disclosure relates to a display device including a fixing device for fixing a display module. Description of the Related Art Recently, display devices, which visually display electrical information signals, are being rapidly developed in accordance with the full-scale entry into the information era. Various studies are being continuously conducted to develop a variety of display devices which are thin and lightweight, consume low power, and have improved performance. As the representative display devices, there are a liquid crystal display device (LCD), an electrowetting display device (EWD), an organic light-emitting display device (OLED), and the like. Among the display devices, an organic light-emitting display device refers to a display device that autonomously emits light. Unlike a liquid crystal display apparatus, the organic light-emitting display device does not require a separate light source and thus may be manufactured as a lightweight, thin display device. In addition, the organic light-emitting display device is advantageous in terms of power consumption because the electroluminescent display device operates at a low voltage. Further, the organic light-emitting display device is expected to be adopted in various fields because the organic light-emitting display device is also excellent in implementation of colors, response speeds, viewing angles, and contrast ratios (CRs). The organic light-emitting display device is configured such that an organic light-emitting layer made of an organic material is disposed between two electrodes called an anode and a cathode. When positive holes are injected into the emission layer from the anode and electrons are injected into the emission layer from the cathode, the injected electrons and positive holes are recombined and produce excitons in an emission layer. BRIEF SUMMARY Because of the spontaneous light-emitting characteristics of the organic light-emitting display device, there is a problem in that an organic light-emitting layer of a display panel is degraded, denaturized, and decomposed by heat generated from the organic light-emitting layer when the organic light-emitting display device operates over a long period of time. This degradation problem causes a luminance deviation between pixels, which causes a deterioration in image quality, such as the occurrence of an afterimage, and a decrease in lifespan. In particular, this degradation problem becomes more serious as an area of the display panel increases. In order to solve the above-mentioned degradation problem, a heat dissipation plate, which is configured to dissipate high-temperature heat, which is generated from the display panel, to the outside, is provided between the display panel and a back cover and attached by using an adhesive tape. However, the inventors of the present disclosure have recognized that positioning a tape between the heat dissipation plate and the display panel reduces heat dissipation efficiency and causes the tape to separate due to heat generated by the display panel. Therefore, the present disclosure provides a display device featuring a novel mechanical fixing structure that replaces traditional adhesive methods (such as tape) with a secure, modular system. The structure includes a side frame and a fixation part comprising a holder frame, holder rod, and pressing member that mechanically secure the display module components—such as the display panel, printed circuit board (PCB), and drive integrated circuits (ICs)—without the use of adhesives. This design addresses common reliability issues in OLED and similar displays by preventing component separation due to heat and improving overall structural integrity. Additionally, various embodiments of the display device integrate an electrical connection module into the fixing structure, allowing internal components (e.g., the display panel, COF, and PCB) to be electrically connected via embedded connection lines with specially shaped contact ends. These features collectively enhance heat dissipation efficiency, reduce the risk of conductive failure, and improve the manufacturing reliability and longevity of the display device, particularly in high-performance or large-area applications. For instance, some embodiments of the present disclosure provide a fixing device for fixing a display module, the fixing device being capable of mechanically coupling constituent elements, which constitute the display module, without using an adhesive material such as a tape, and a display device including the same. Meanwhile, in the display module in the related art, circuit components, such as a printed circuit board or a drive integrated circuit (IC)