KR-102962702-B1 - Rigid film and display device having the same

Abstract

One embodiment of the present invention provides a reinforcing substrate comprising a reinforcing layer including a central portion having a thin thickness in the center, and a plurality of reinforcing members arranged with spacing on said central portion, wherein the reinforcing member arranged in the center among the plurality of reinforcing members has the highest height.

Inventors

• 이상덕
• 김원진
• 오선옥
• 변상철
• 한수연

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20220125

Claims (20)

1. A reinforcing layer comprising a central portion having a first thickness, and a first peripheral portion and a second peripheral portion disposed on each side of the central portion and having a second thickness greater than the first thickness; and It includes a plurality of reinforcing members arranged at intervals from the first peripheral portion toward the second peripheral portion, positioned on the central portion above. A reinforcing substrate comprising a plurality of reinforcing members, a first reinforcing member positioned in the middle of the central portion and a second reinforcing member positioned at the edge of the central portion, wherein the height of the first reinforcing member is greater than the height of the second reinforcing member.
2. In paragraph 1, A reinforcing substrate in which the height of each of the plurality of reinforcing members decreases from the center toward the edge.
3. In paragraph 2, A reinforcing substrate in which the height of each of the above plurality of reinforcing members decreases with a constant height difference.
4. In paragraph 1, A reinforcing substrate, wherein the first reinforcing member has a third thickness, and the sum of the first thickness and the third thickness is greater than the second thickness.
5. In paragraph 1, The central portion of the reinforcing layer includes a plurality of openings and a plurality of blocking portions joined to the reinforcing body, and A reinforcing substrate in which the plurality of openings and the plurality of blocking parts are alternately arranged.
6. In paragraph 1, A reinforcing substrate comprising the feature that the plurality of reinforcing bodies are formed of a material different from the reinforcing layer.
7. In paragraph 6, The above plurality of reinforcing bodies is a reinforcing substrate having a melting point lower than that of the reinforcing layer.
8. In paragraph 1, A reinforcing substrate comprising the feature that the plurality of reinforcing members are arranged on the central portion at regular intervals.
9. In paragraph 1, A reinforcing substrate having a plurality of reinforcing members arranged with symmetrical heights based on the center of the central portion.
10. In paragraph 1, A reinforcing substrate comprising the characteristic that the melting point of the plurality of reinforcing bodies is lower than the melting point of the reinforcing layer.
11. A reinforcing layer comprising a central portion having a first thickness, and a first peripheral portion and a second peripheral portion disposed on both sides of the central portion and having a second thickness greater than the first thickness, and A reinforcing substrate comprising a plurality of reinforcing members arranged at intervals from the first peripheral portion toward the second peripheral portion, disposed on the central portion above; and A display layer disposed on the reinforcing substrate; comprising, A display device comprising a plurality of reinforcing members, a first reinforcing member positioned in the middle of the central portion and a second reinforcing member positioned at the edge of the central portion, wherein the height of the first reinforcing member is greater than the height of the second reinforcing member.
12. In Paragraph 11, A display device in which the height of each of the plurality of reinforcing members decreases from the center toward the edge.
13. In Paragraph 12, A display device in which the height of each of the above plurality of reinforcing members decreases with a constant height difference.
14. In Paragraph 11, A display device in which the first reinforcing member has a third thickness, and the sum of the first thickness and the third thickness is greater than the second thickness.
15. In Paragraph 11, The central portion of the reinforcing layer includes a plurality of openings and a plurality of blocking portions joined to the reinforcing body, and A display device in which the plurality of openings and the plurality of blocking parts are alternately arranged.
16. In Paragraph 11, A display device comprising the feature that the plurality of reinforcing bodies are formed of a material different from the reinforcing layer.
17. In Paragraph 16, A display device having a plurality of reinforcing bodies having a melting point lower than that of the reinforcing layer.
18. In Paragraph 11, A display device comprising the feature that the plurality of reinforcing members are arranged on the central portion at regular intervals.
19. In Paragraph 11, A display device in which the plurality of reinforcing members are arranged with symmetrical heights based on the center of the central part.
20. In Paragraph 11, A display device comprising the characteristic that the melting point of the plurality of reinforcing bodies is lower than the melting point of the reinforcing layer.

Description

Rigid film and display device having the same Embodiments of the present invention relate to a reinforcing substrate and a display device equipped with the same. A display device is a device that visually displays data. Display devices are used as displays for small products such as mobile phones, as well as for large products such as televisions. Recently, as the applications of display devices have become more diverse, various designs are being attempted to improve the quality and functionality of display devices. Recently, flexible display layers such as foldable display layers that can be folded and rollable display layers that can be rolled into a roll shape are being developed. FIGS. 1 and FIGS. 2 are schematic perspective views of a display device according to one embodiment of the present invention. FIG. 3 is a cross-sectional view schematically showing a part of a display device according to one embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing a part of a reinforcing substrate according to one embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing a portion of a reinforcing substrate according to one embodiment of the present invention. FIGS. 6a to 6c are cross-sectional views illustrating the principle of surface crease phenomenon. FIG. 7 is a cross-sectional view schematically showing a part of a reinforcing substrate according to one embodiment of the present invention. FIG. 8 is a cross-sectional view schematically showing a portion of a reinforcing substrate according to one embodiment of the present invention. The effects 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. Shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for describing embodiments of the present invention are exemplary and are not limited to the illustrated details of the present invention. Throughout the specification, the same reference numerals refer to the same components. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such descriptions may unnecessarily obscure the essence of the present invention. Terms such as “comprising,” “having,” and “consisting of” mentioned in this specification may be used to add other parts unless “only” is used. When a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise. In describing the positional relationship of components, where the positional relationship between two parts is described using, for example, ‘on top of,’ ‘below,’ or ‘next to,’ one or more other parts may be located between the two parts unless ‘immediately’ or ‘directly’ is used. Furthermore, terms such as "first," "second," etc., are not used in a limiting sense but are used for the purpose of distinguishing one component from another. Accordingly, the first component mentioned below may also be the second component within the technical scope of the present invention. Since the sizes of components in the drawings may be exaggerated or reduced for convenience of explanation, the present invention is not necessarily limited to what is illustrated. The features of each of the various embodiments of the present invention may be combined or combined partially or wholly, and various technical interlocking and operation are possible; each embodiment may be implemented independently or may be implemented together in an associated relationship. The present invention will be described below with reference to the drawings. FIGS. 1 and FIGS. 2 are schematic perspective views showing a part of a display device according to an embodiment of the present invention. FIGS. 1 shows the display device (1) in an unfolded state, and FIGS. 2 shows the display device (1) in a folded state. Referring to FIGS. 1 and FIGS. 2, the display device (1) may include a lower cover (LC), a display layer (DL), and a cover window (CW). The lower cover (LC) may include a first part (P1) and a second part (P2) that support the display layer (DL). The lower cover (LC) may be folded around a folding axis (FAX) defined between the first part (P1) and the second part (P2). In one embodiment, the lower cover (LC) may further include a hinge part (HP), and the hinge part (HP) may be provided between the first part (P1) and the second part (P2). The display layer (DL) may include a display area (DA). The displa