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KR-20260062148-A - FOLDABLE DISPLAY DEVICE

KR20260062148AKR 20260062148 AKR20260062148 AKR 20260062148AKR-20260062148-A

Abstract

A foldable display device according to the embodiments of the present specification comprises a main area and a sub-area, a bending area between the main area and the sub-area, a display unit including a folding area that is folded along a folding axis and a non-folding area excluding the folding area, a plurality of plates disposed below the display unit and supporting the display unit, and a plurality of adhesive layers disposed between each of the display unit and the plurality of plates, wherein at least one of the plurality of adhesive layers may have a different modulus for at least two areas within the main area.

Inventors

  • 장석락

Assignees

  • 엘지디스플레이 주식회사

Dates

Publication Date
20260507
Application Date
20241025

Claims (18)

  1. A display unit comprising a main area and a sub area, and a bending area between the main area and the sub area, wherein the main area includes a folding area that is folded with respect to a folding axis and a non-folding area excluding the folding area; A plurality of plates disposed below the above-mentioned display unit and supporting the above-mentioned display unit; and It includes a plurality of adhesive layers disposed between each of the above-mentioned display portion and the plurality of plates, and A foldable display device in which at least one of the plurality of adhesive layers has a different modulus for at least two regions within the main region.
  2. In paragraph 1, The above main area includes a first area, a second area, and a third area, and The first region above overlaps with a part of the folding region, and The second region above overlaps with another part of the folding region, and A foldable display device in which the third region above does not overlap with the folding region above.
  3. In paragraph 2, A foldable display device wherein the first region is positioned further outward than the second region and overlaps with at least a portion of a non-display area in which an image is not displayed.
  4. In paragraph 2, At least one of the plurality of adhesive layers above is, Each of the first to third regions above has a different modulus, or A foldable display device having different moduli in one of the first to third regions and the remaining two regions.
  5. In paragraph 4, At least one of the plurality of adhesive layers above is, A foldable display device having a higher modulus in the first region than in the second region or the third region.
  6. In paragraph 2, The second region above overlaps with the central region within the folding region, and A foldable display device in which the third region is a region different from the first region and the second region, and overlaps with the non-folding region.
  7. In paragraph 2, A foldable display device in which the boundary line between the first region and the second region is orthogonal to the folding axis.
  8. In paragraph 1, The above main area includes a display area where an image is displayed and a non-display area surrounding the display area, and A foldable display device in which the above sub-region includes a pad area to which circuit-related components are electrically connected.
  9. In paragraph 1, The above plurality of plates are, First plate; and It includes a second plate disposed on the first plate, and The first plate above is, A plurality of holes formed in the above folding area; and A foldable display device comprising a folding pattern formed between each of the plurality of holes.
  10. In Paragraph 9, A foldable display device in which at least one folding pattern extends parallel to the folding axis of the folding region.
  11. In Paragraph 9, The above second plate comprises a black polyimide, forming a foldable display device.
  12. In paragraph 1, A foldable display device further comprising a folding tape covering the above-mentioned folding area.
  13. In Paragraph 12, The first plate includes a plurality of holes formed in the folding area, and A foldable display device in which the folding tape is positioned below the first plate and covers the plurality of holes.
  14. In Paragraph 12, The above folding tape is a foldable display device comprising polyurethane.
  15. In paragraph 1, A foldable display device further comprising a touch sensor layer disposed on the upper portion of the above display.
  16. In paragraph 1, A foldable folder display device further comprising a color layer disposed on the upper part of the above-mentioned display portion.
  17. In paragraph 1, A touch sensor layer disposed on the above-mentioned display unit; and A foldable display device further comprising a color layer disposed on the touch sensor layer.
  18. In paragraph 1, A foldable display device further comprising a polarizing layer disposed on the upper portion of the above display.

Description

Foldable Display Device This specification relates to a foldable display device. As the information society develops, there is an increasing demand for display devices that display images, and various types of display devices, such as Liquid Crystal Displays and Organic Light Emitting Diode Displays, are being utilized. In particular, demand for Organic Light Emitting Diodes is increasing due to their advantages in lightweight and thin design, as they do not require a separate light source. Furthermore, recently, foldable displays, which can be freely folded and unfolded by forming a display area and wiring on a flexible substrate, are attracting attention as next-generation display devices. FIG. 1 is a plan view of a display device according to one embodiment. FIG. 2 is a cross-sectional view showing the bent state of the display panel according to FIG. 1. Figure 3 is a cross-sectional view taken along the line AA' of Figure 1. Figure 4 is another cross-sectional view taken along the line AA' of Figure 1. The advantages and features of this specification and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, this specification is not limited to the embodiments disclosed below but may be implemented in various different forms, and these embodiments are provided merely to ensure that the disclosure of this specification is complete and to fully inform those skilled in the art of the scope of this specification. Shapes, areas, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are exemplary, and this specification is not limited to the depicted details. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing this specification, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of this specification, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise. In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement. In the case of describing a positional relationship, for example, when the positional relationship between two parts is described using expressions such as 'on,' 'upper,' 'lower,' or 'next to,' one or more other parts may be located between the two parts unless 'immediately' or 'directly' is used. When an element or layer is referred to as "on" another element or layer, it includes cases where another layer or element is placed directly on top of or in between. Additionally, terms such as "first," "second," etc. are used to describe various components, but these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of this specification. Throughout the specification, the same reference numerals refer to the same components. The area and thickness of each component shown in the drawings are illustrated for convenience of explanation and are not necessarily limited to the area and thickness of the components illustrated in this specification. The features of each of the various embodiments of this specification 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. The present specification will be described below with reference to the drawings. FIG. 1 is a plan view of a display device (1) according to one embodiment. Referring to FIG. 1, a display device (1) according to one embodiment may include a display panel (100). The display panel (100) may include a display area (DA) comprising a plurality of pixels (PX) and a non-display area (NDA) surrounding the display area (DA). The planar shape of the display area (DA) may have a rectangular shape. However, not limited thereto, the planar shape of the display area (DA) may be a square, a circle, an ellipse, or other polygon. For example, the display area (DA) may have a rectangular shape with rounded corners, but is not limited thereto, and may also have a rectangular shape with angular corners. The display area (DA) is an area for displaying an image, and may include a display element for displaying the image and a circuit for driving the display element. For example, if the display device (1) is an organic light-emitting display device, the display element may include an organic light