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EP-4741992-A1 - ELECTRONIC APPARATUS

EP4741992A1EP 4741992 A1EP4741992 A1EP 4741992A1EP-4741992-A1

Abstract

Provided is an electronic apparatus including an electronic panel (EP) folded with respect to a folding axis extending along a first direction and including a light-emitting element, and a window member (UPP) on the electronic panel (EP) and folded with respect to the folding axis. The window member (UPP) includes a first film (FL1) on an uppermost side, a second film (FL2) between the first film (FL1) and the electronic panel (EP), a first adhesive layer (AS1) between the first film (FL1) and the second film (FL2) and attached to a rear surface of the first film (FL1), and a second adhesive layer (AS2) between the electronic panel (EP) and the second film (FL2) and attached to the electronic panel (EP). Each of the first film (FL1) and the second film (FL2) has a modulus about 5 GPa or less.

Inventors

  • KIM, JI-HOON
  • DO, MINSEOK
  • PARK, Youngsang
  • BYEON, MINSEONG
  • AN, SUNGGUK
  • LEE, GEUNWOOK
  • Lee, Seungri
  • JEONG, CHUL HO

Assignees

  • Samsung Display Co., Ltd.

Dates

Publication Date
20260513
Application Date
20251031

Claims (15)

  1. An electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) comprising: an electronic panel (EP) folded with respect to a folding axis extending along a first direction and including a light-emitting element; and a window member (UPP) on the electronic panel (EP) and folded with respect to the folding axis, wherein the window member (UPP) includes: a first film (FL1) on an uppermost side; a second film (FL2) between the first film (FL1) and the electronic panel (EP); a first adhesive layer (AS1) between the first film (FL1) and the second film (FL2) and attached to a rear surface of the first film (FL1); and a second adhesive layer (AS2) between the electronic panel (EP) and the second film (FL2) and attached to the electronic panel (EP), wherein, each of the first film (FL1) and the second film (FL2) has a modulus of about 5 GPa or less, and wherein, a modulus of the second film (FL2) is greater than about 700 MPa.
  2. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of claim 1, wherein the modulus of the second film (FL2) is smaller than the modulus of the first film (FL1).
  3. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of claim 1 or 2, wherein each of the first film (FL1) and the second film (FL2) has a thickness in a range from approximately 20 µm to approximately 100 µm.
  4. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 1 of the 3, further comprising: a third film (FL3) between the electronic panel (EP) and the second film (FL2); and a third adhesive layer (AS3) between the third film (FL3) and the second film (FL2) and configured to bond the second film (FL2) and the third film (FL3).
  5. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of claim 4, wherein a modulus of the third film (FL3) is: about 5 GPa or less; and/or greater than or equal to the modulus of the first film (FL1).
  6. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of claim 4 or 5, wherein the modulus of the second film (FL2) is smaller than the modulus of each of the first film (FL1) and the third film (FL3).
  7. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 4 to 6, wherein the first to third films (FL3) each have a thickness of greater than about 20 µm and smaller than about 100 µm.
  8. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 4 to 7, wherein a thickness of the third film (FL3) is greater than or equal to a thickness of each of the first film (FL1) and the second film (FL2).
  9. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of claim 8, wherein the thickness of the second film (FL2) is less than or equal to the thickness of each of the first film (FL1) and the third film (FL3).
  10. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 4 to 9, further comprising a fourth film between the third film (FL3) and the second film (FL2), wherein a modulus of the fourth film is about 5 GPa or less.
  11. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 1 to 10, wherein each of the first film (FL1) and the second film (FL2) has a light transmittance of about 90% or more.
  12. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 1 to 11, wherein each of the first film (FL1) and the second film (FL2) comprises a resin.
  13. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 1 to 10, wherein the electronic panel (EP) comprises a color filter or black matrix.
  14. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 1 to 13, wherein the window member (UPP) is folded in a direction surrounding the folding axis.
  15. The electronic apparatus (1000, 1000-1, 1000-2, 1000-3, 1001, 1100) of one of claims 1 to 13, further comprising: a housing (111B, 152, EDC1, EDC2) disposed under the electronic panel (EP) and configured to provide an accommodation space for accommodating the electronic panel (EP), wherein the window member (UPP) includes a third film (FL3) on a lowermost side and bonded to the electronic panel (EP) via an adhesive layer; wherein, each of the first to third films (FL3) has a modulus of about 5 GPa or less; wherein, preferably, the thickness of the first film (FL1) is greater than or equal to the thickness of each of the second film (FL2) and the third film (FL3).

Description

BACKGROUND The present disclosure herein relates to an electronic apparatus, and more particularly, to a foldable electronic apparatus. A curved or foldable electronic apparatus is currently being developed. Such a flexible electronic apparatus may include an electronic panel, such as a flexible display panel or a flexible touch panel, and a window that covers the electronic panel. The window includes various functional layers. The functional layers may be curved, bent or folded together with the electronic panel. Layers constituting an electronic apparatus have a relatively flexible property so as to be curved, bent or folded. When the layers have a flexible property, reliability with respect to stress due to bending may be improved, but reliability with respect to external impacts may be reduced. SUMMARY The present disclosure provides a foldable electronic apparatus with improved impact resistance and flexibility. An embodiment of the present disclosure provides an electronic apparatus including an electronic panel being foldable (e.g., being folded) with respect to a folding axis extending along a first direction and including a light-emitting element, and a window member on the electronic panel and being foldable (e.g., being folded) with respect to the folding axis. The window member includes a first film on an uppermost side, a second film between the first film and the electronic panel, a first adhesive layer between the first film and the second film and attached to a rear surface of the first film, and a second adhesive layer between the electronic panel and the second film and attached to the electronic panel. One or more (e.g., each) of the first film and the second film has a modulus of about 5 GPa or less, and, preferably, a modulus of the second film is greater than about 700 MPa. In an embodiment, the modulus of the second film may be smaller than the modulus of the first film. This further enhances the repulsive force and impact resistance of the window by addressing the position related load to the films. In an embodiment, one or more (e.g., each) of the first film and the second film may have a thickness in a range from approximately 20 µm (e.g., 40 µm) to approximately 100 µm (e.g., 80 µm). This further enhances the repulsive force and impact resistance of the window by addressing the thickness related load to the films. In an embodiment, the electronic apparatus may further include a third film. between the electronic panel and the second film (and/or on a lowermost side of the window member), and a third adhesive layer between the third film and the second film and bonding the second film and the third film. This enhances the repulsive force and impact resistance of the window by increasing the overall thickness. In an embodiment, a modulus of the third film may be about 5 GPa or less and/or 700 MPa or more (e.g., 100 GPa or more). This further enhances the repulsive force and impact resistance of the window by addressing the load to the films. In an embodiment, the modulus of the second film may be smaller than the modulus of one or more (e.g., each) of the first film and the third film. This further enhances the repulsive force and impact resistance of the window by addressing the position related load to the films. In an embodiment, the first to third films may each have a thickness of greater than about 20 µm (e.g., 40 µm) and/or smaller than about 100 µm (e.g., 80 µm). This further enhances the repulsive force and impact resistance of the window by addressing the thickness related load to the films. In an embodiment, a thickness of the third film may be greater than or equal to a thickness of one or more (e.g., each) of the first film and the second film. This further enhances the repulsive force and impact resistance of the window by addressing the thickness related load to the films. In an embodiment, the thickness of the second film may be less than or equal to the thickness of one or more (e.g., each) of the first film and the third film. This further enhances the repulsive force and impact resistance of the window by addressing the thickness related load to the films. In an embodiment, the electronic apparatus may further include a fourth film between the third film and the second film, wherein a modulus of the fourth film is about 5 GPa or less and/or 700 MPa or more (e.g., 100 GPa or more). This enhances the repulsive force and impact resistance of the window by increasing the overall thickness. In an embodiment, one or more (e.g., each) of the first film and the second film may have a light transmittance of about 90% or more. This enhances transparency of the window. In an embodiment, one or more (e.g., each) of the first film and the second film may include a resin or may be made from the resin. Resin further enhances the repulsive force and impact resistance of the window over time as being a time durable and environment stable material. In an embodiment, the electronic