CN113870704A

CN113870704A - Display device

Info

Publication number: CN113870704A
Application number: CN202111136480.0A
Authority: CN
Inventors: 郑建平
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-12-31
Anticipated expiration: 2041-09-27
Also published as: CN113870704B

Abstract

The embodiment of the application provides a display device, include along the setting of stacking gradually of first direction: the first functional layer, the first glue layer and the second functional layer; the second functional layer comprises an auxiliary functional layer, the auxiliary functional layer comprises a first subsection and a second subsection, the first subsection comprises at least one thinning area, the thickness of the thinning area in the first direction is smaller than that of the second subsection in the first direction, and the first direction is perpendicular to the plane of the first functional layer; at least part of the edge of the orthographic projection of the first glue layer in the first direction is positioned in the orthographic projection of the first sub-part in the first direction. The deformation of first glue film can be improved to this application, and then can improve the bubble that appears between first functional layer that first glue film deformation leads to and the second functional layer and influence display device's life, consequently this application can improve display device's life.

Description

Display device

Technical Field

The application relates to the technical field of display equipment, in particular to a display device.

Background

With the continuous development of the technology, people have higher and higher requirements on the display area of the display device. In order to increase the display area of the display device, a scroll screen or a folding screen is operated. Among them, the foldable display device is favored and expected by virtue of its convenience in storage in a folded state and a large display area in an unfolded state. Folding display device includes display panel and apron, and display panel and apron bond through gluing the material, because folding display device need reciprocal deformation, lead to gluing the material and easily take place to warp for bad such as bubble appear between display panel and the apron, thereby seriously influence display device's life.

Disclosure of Invention

The embodiment of the application provides a display device, and aims to prolong the service life of the display device.

An embodiment of a first aspect of the present application provides a display device, including stacked in sequence along a first direction: the first functional layer, the first glue layer and the second functional layer; the second functional layer comprises an auxiliary functional layer, the auxiliary functional layer comprises a first subsection and a second subsection, the first subsection comprises at least one thinning area, the thickness of the thinning area in the first direction is smaller than that of the second subsection in the first direction, and the first direction is perpendicular to the plane of the first functional layer; at least part of the edge of the orthographic projection of the first glue layer in the first direction is positioned in the orthographic projection of the first sub-part in the first direction.

In the display device provided by the embodiment of the application, the display device comprises a first functional layer, a second functional layer and a glue layer positioned between the first functional layer and the second functional layer. The auxiliary functional layer of the second functional layer comprises a first subsection and a second subsection, the first subsection has a thinned region, the thickness of the thinned region is smaller, therefore, the structural strength of the thinned region is smaller, and the thinned region is easy to deform, namely, the first subsection is easy to deform. Partial edge of the orthographic projection of the first glue layer in the first direction is located within the orthographic projection of the first sub-portion, namely, the partial edge of the first glue layer and the first sub-portion are arranged in an overlapping mode along the first direction. When the edge of the first adhesive layer receives acting force towards the second functional layer, the first division part can deform to absorb the acting force, so that the acting force received by the first adhesive layer can be reduced, and the deformation of the first adhesive layer is improved. Therefore, the deformation of the first glue layer can be improved by arranging the thinning part with smaller thickness at the first part, and the influence on the service life of the display device caused by the bubbles between the first functional layer and the second functional layer due to the deformation of the first glue layer can be further improved. Therefore, the service life of the display device can be prolonged.

Drawings

Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like or similar reference characters identify the same or similar features.

Fig. 1 is a schematic structural diagram of a display device in the related art.

Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

fig. 4 is a force analysis diagram of a display device according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 2 in another embodiment of the present application;

FIG. 6 is a cross-sectional view taken at A-A of FIG. 2 according to yet another embodiment of the present application;

fig. 7 is a schematic structural diagram of a first adhesive layer of a display device according to another embodiment of the present disclosure;

FIG. 8 is a schematic view of a portion of the enlarged structure at I in FIG. 3;

FIG. 9 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 10 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 11 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 12 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 13 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 14 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 15 is a partial enlarged view of FIG. 3 at I in another embodiment;

FIG. 16 is a partial enlarged view of FIG. 3 at I in another embodiment;

fig. 17 is a partial enlarged structural view at I in fig. 3 in another embodiment.

Description of reference numerals:

100. a display device;

10. a first functional layer; 11. a cover plate; 12. a protective film;

20. a first glue layer; 21. a first side edge; 22. a second side edge;

30. a second functional layer; 31. an auxiliary functional layer; 301. a groove; 301a, a first groove; 301b, a second groove; 302. a hollow-out section; 31a, a thinning region; 310. a first section; 311. a first section; 311a, a first surface; 312. a second section; 312a, a second surface; 320. a second subsection; 330. a filling section; 32. a display panel; 33. a buffer layer; 34. a substrate; 35. a support film; 36. a polarizer;

40. a force application assembly;

AB. A bending zone; NAB, non-kink zone; n, a first axis; p, the first centerline.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device provided in the related art. The display device comprises a support film, and a display structure layer 01, a polaroid 02, an optical adhesive layer 03 and a cover plate 04 which are sequentially arranged on the support film. In fig. 1, in order to better illustrate the stress of the optical adhesive layer 03, the optical adhesive layer 03 and the polarizer 02 are arranged at intervals. In the bending display device, since the cover plate 04 may be bent, the size of the optical adhesive layer 03 is smaller than that of the cover plate 04 and that of the polarizer 03 at two sides of the display device along the bending axis, which results in the optical adhesive layer 03 being recessed relative to the cover plate 04 and the polarizer 02.

The inventor finds that when the cover 04 is forced by the force applying assembly 40 'such as a roller, so that the cover 04 and the polarizer 02 are attached to each other, as shown by the arrow on the force applying assembly 40' in fig. 1, the edge of the optical adhesive layer 03 is stressed greatly. And as shown by the solid arrows in fig. 1, the force may form a force from the edge of optical adhesive layer 03 toward the inner side of optical adhesive layer 03, so that optical adhesive layer 03 may be deformed by pressing from both sides to the middle. After the laminating of apron 04 and polaroid 02 is ended, the optics glue film 03 that is extrudeed deformation can rebound deformation, leads to appearing the bubble between apron 04 and the polaroid 02 to lead to apron 04 and the laminating of polaroid 02 bad, seriously influence display device's life.

The present application is proposed to solve the above-mentioned technical problems. For better understanding of the present application, a display device according to an embodiment of the present application will be described in detail below with reference to fig. 2 to 17.

Referring to fig. 2 and fig. 3 together, fig. 2 is a schematic structural diagram of a display device 100 according to an embodiment of the present disclosure, and fig. 3 is a cross-sectional view taken at a-a in fig. 2.

As shown in fig. 2 and 3, a display device 100 according to an embodiment of the present application includes: a first functional layer 10, a first glue layer 20, a second functional layer 30; the second functional layer 30 comprises a secondary functional layer 31, the secondary functional layer 31 comprising a first subsection 310 and a second subsection 320, the first subsection 310 comprising at least one thinned zone 31a, the thickness of the thinned zone 31a in a first direction X being smaller than the thickness of the second subsection 320 in the first direction X, the first direction X being perpendicular to the plane of the first functional layer 10; wherein, at least part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first sub-portion 310 in the first direction X.

The thickness of the reduced thickness area 31a in the first direction X being smaller than the thickness of the second subsection 320 in the first direction X means: the material thickness at the location of the reduced area 31a is smaller than the material thickness of the second subsection 320. For example, the first subsection 310 may be notched at the thinned region 31a such that the thickness of the thinned region 31a is less than the thickness of the second subsection 320, i.e., the outer surface of the first subsection 310 is able to observe that the thickness of the thinned region 31a is less than the thickness of the second subsection 320; or the first subsection 310 may be hollow so that the thickness of the thinned region 31a is less than the thickness of the second subsection 320, and the thinned region 31a is less than the thickness of the second subsection 320 as long as the material thickness at the location of the thinned region 31a is less than the material thickness of the second subsection 320.

Fig. 3 only shows the first functional layer 10, the auxiliary functional layer 31 of the second functional layer 30, and the first adhesive layer 20. Optionally, other film layers may be disposed between the auxiliary functional layer 31 and the first adhesive layer 20. Alternatively, the first adhesive layer 20 may be an optical adhesive layer.

In the display device 100 provided in the embodiment of the present application, the display device 100 includes a first functional layer 10, a second functional layer 30, and a first glue layer 20 located between the first functional layer 10 and the second functional layer 30. The auxiliary functional layer 31 of the second functional layer 30 includes a first subsection 310 and a second subsection 320, the first subsection 310 has a reduced thickness 31a, the thickness of the reduced thickness 31a is smaller, the structural strength of the reduced thickness 31a is smaller, the reduced thickness 31a is easily deformed, that is, the first subsection 310 is easily deformed to absorb a part of the bending stress. Part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first sub-portion 310, i.e. part of the edge of the first glue layer 20 and the first sub-portion 310 are arranged in an overlapping manner along the first direction X.

Fig. 4 is a force analysis diagram of a display device according to an embodiment of the present disclosure, as shown in fig. 4, and fig. 4 shows a deformation state of the first sub-portion 310 according to an embodiment. When the edge of the first glue layer 20 is subjected to a force towards the second functional layer 30, a partly deformable space may be provided for deforming to absorb the force, as the first sub-section 310 is thinned. Therefore, when the first sub-portion 310 deforms, the stress on the first adhesive layer 20 can be reduced, so that the deformation of the first adhesive layer 20 can be improved, and the influence of bubbles generated between the first functional layer 10 and the second functional layer 30 due to the deformation of the first adhesive layer 20 on the service life of the display device 100 can be avoided, and therefore, the service life of the display device 100 can be prolonged.

Optionally, at least a part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first functional layer 10 in the first direction X. I.e. at least part of the edge of the first glue layer 20 is recessed with respect to the first functional layer 10. As shown in fig. 1, the display device 100 has a first central line P extending along the second direction Y, and the recessing of at least a portion of the edge of the first glue layer 20 with respect to the first functional layer 10 means: at least part of the edge of the first glue layer 20 is located on the side of the edge of the first functional layer 10 facing the first centre line P. When first glue film 20 and first functional layer 10 laminated each other, even the laminating error appears, also can guarantee first glue film 20 and the laminating of first functional layer 10, avoid first glue film 20 to stretch out outside first functional layer 10, simultaneously, be in under the state of buckling as display device, first glue film also can receive the stress of buckling and be dragged to the adhesion is on adjacent rete, consequently, it has the discrepancy absolutely to set up between first glue film and the adjacent rete, can prevent that first glue film adhesion is on other retes under the state of buckling.

Referring to fig. 5, fig. 5 is a cross-sectional view taken along line a-a of fig. 2 according to another embodiment of the present application.

As shown in fig. 5, optionally, the second functional layer 30 further includes a display panel 32, the display panel 32 is located between the auxiliary functional layer 31 and the first adhesive layer 20, that is, the first adhesive layer 20 is disposed between the display panel 32 and the first functional layer 10, and the display panel 32 is bonded to the first functional layer 10 through the first adhesive layer 20; at least part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the display panel 32 in the first direction X. That is, at least part of the edge of the first adhesive layer 20 is recessed relative to the display panel 32, and at least part of the edge of the first adhesive layer 20 is located on one side of the edge of the display panel 32 facing the first center line P. Similarly, when first glue film 20 and display panel 32 were laminated each other, even the laminating error appeared, also can guarantee first glue film 20 and display panel 32 laminating, avoid first glue film 20 to stretch out outside display panel 32, be in under the state of buckling at display device in addition, prevent first glue film adhesion on other retes.

Referring to fig. 6, fig. 6 is a cross-sectional view taken along line a-a of fig. 2 according to another embodiment of the present disclosure.

As shown in fig. 6, in some alternative embodiments, the display device 100 further includes: a buffer layer 33 on a side of the display panel 32 facing away from the second functional layer 30; a substrate 34 on a side of the buffer layer 33 facing away from the display panel 32; and a support film 35 on a side of the substrate 34 facing away from the display panel 32. The support film 35, the substrate 34, the support film 35, and the display panel 32 are bonded to each other by an adhesive layer. The auxiliary functional layer 31 may include at least one of a buffer layer 33, a substrate 34, and a support film 35. Fig. 6 of the present application illustrates an example in which the auxiliary functional layer 31 is a support film 35.

As shown in fig. 6, in some alternative embodiments, the display device 100 further includes: a cover plate 11 on the side of the display panel 32 facing away from the first functional layer 10; a protective film 12 on a side of the cover plate 11 facing away from the display panel 32, the first functional layer 10 comprising at least one of the cover plate 11 and the protective film 12. The first functional layer 10 is exemplified as the cover plate 11 in the present application. The cover plate 11 and the protective film 12 are bonded to each other by an optical adhesive layer. The material of the cover plate 11 may for example comprise a flexible glass material, the thickness of the cover plate 11 being for example less than or equal to 100 μm. The flexible glass material has good toughness, high structural strength, and excellent flatness and transparency, so that the cover plate 11 has good protection performance and can realize folding of the display device.

As shown in fig. 6, in some alternative embodiments, a polarizer 36 is further disposed on a side of the display panel 32 facing away from the auxiliary functional layer 31, and the first adhesive layer 20 may be disposed between the polarizer 36 and the cover plate 11. The polarizer 36 includes at least one of a PVA film, a TAC film, a protective film, a release film, and a pressure sensitive adhesive layer, and the polarizer 36 is used to change the light emitting direction.

Optionally, as mentioned above, at least a part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first functional layer 10 in the first direction X, that is, at least a part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the cover plate 11 in the first direction X, and the first glue layer 20 is recessed relative to the cover plate 11. At least part of the edge of the orthographic projection of the first adhesive layer 20 in the first direction X is located within the orthographic projection of the polarizer 36 in the first direction X, and the first adhesive layer 20 is recessed relative to the polarizer 36.

In the display device 100 provided in the embodiment of the application, in the process of using the force application assembly 40 such as the roller to make the cover plate 11 and the polarizer 36 adhere to each other through the first adhesive layer 20, when the force application assembly 40 is located at a position far from the edge of the first adhesive layer 20, since the structural strength of the second sub-portion 320 on the support film 35 is high, the second sub-portion 320 is not deformed, and the support film 35 can provide a better support effect. As the force applying assembly 40 comes closer to the edge of the first layer of glue 20, the cover plate 11 will provide a force to the first layer of glue 20 that is inclined downwards and towards the middle as indicated by the arrow in fig. 6, since at least part of the edge of the cover plate 11 is located outside the first layer of glue 20, away from the first centre line P. At this time, the first sub-portion 310 on the support film 35 can deform downward to absorb a part of the applied force due to the presence of the thinning area 31a, thereby reducing the force applied to the first adhesive layer 20. Further, since the support film 35 and the substrate 34 are adhered to each other by the adhesive layer, which is generally a flexible layer, even if the support film 35 slightly deforms, the adhesive layer can compensate for the deformation on the support film 35 without causing the support film 35 and the substrate 34 to separate from each other. When the first sub-portion 310 deforms, the stress of the first adhesive layer 20 can be reduced, so that the deformation of the first adhesive layer 20 can be improved, and the problem that the service life of the display device 100 is affected by bubbles appearing between the first functional layer 10 and the second functional layer 30 due to the deformation of the first adhesive layer 20 is solved, so that the service life of the display device 100 can be prolonged.

Referring to fig. 6 and 7 together, fig. 7 is a schematic structural diagram of a first adhesive layer 20 of a display device 100 according to another embodiment of the present disclosure. The position of the thinned zone 31a shown in fig. 6 is illustrated in fig. 7 by a dashed line, which does not constitute a structural limitation of the first layer of glue 20.

Optionally, in some alternative implementations, as shown in fig. 6 and 7, the display device 100 includes a bending region AB and a non-bending region NAB, the non-bending regions NAB are located at two opposite sides of the bending region AB in a second direction Y, and the second direction Y is parallel to the plane of the first functional layer 10; the first glue layer 20 comprises two first lateral edges 21 opposite in the second direction Y and two second lateral edges 22 opposite in a third direction Z parallel to the plane of the first functional layer 10 and crosswise to the second direction Y; the orthographic projection of the second side edge 22 in the first direction X is located within the orthographic projection of the first section 310 in the first direction X. Optionally, the second direction Y and the third direction Z are perpendicular to each other.

In these alternative embodiments, when the first adhesive layer 20 is attached to the polarizer 36, even if an attachment error occurs, the first adhesive layer 20 can be prevented from being attached to the outside of the polarizer 36. When the cover plate 11 is attached to the first adhesive layer 20, even if an attachment error occurs, the first adhesive layer 20 can be prevented from being exposed from the cover plate 11.

When the second side 22 is subjected to a force toward the second functional layer 30, the first portion 310 may absorb at least a portion of the force by deformation, so as to reduce the force applied to the first side 21, further reduce the deformation of the first side 21, and improve the occurrence of bubbles between the cover plate 11 and the polarizer 36 caused by the deformation of the first adhesive layer 20, which affects the service life of the display device 100.

Optionally, with continued reference to fig. 6, the edge of the orthographic projection of the second side 22 in the first direction X is located within the orthographic projection of the cover 11 in the first direction X, the orthographic projection of the polarizer 36 in the first direction X, and the orthographic projection of the first subsection 310 in the first direction X.

In these alternative embodiments, on the one hand, the second side edge 22 is recessed with respect to the cover plate 11 and the polarizer 36, and the first adhesive layer 20 does not extend beyond the cover plate 11 or the polarizer 36. On the other hand, in the process of attaching the cover plate 11 and the polarizer 36 by using the first adhesive layer 20, when the force application assembly 40 such as a roller is moved from one side of the cover plate 11 to the other side of the cover plate 11, the second side 22 receives the acting force towards the polarizer 36, and the acting force is reduced under the deformation action of the first sub-portion 310, so that the stress of the first adhesive layer 20 can be reduced, the deformation of the first adhesive layer 20 is improved, and the problem that the service life of the display device 100 is affected by bubbles appearing between the cover plate 11 and the polarizer 36 due to the deformation of the first adhesive layer 20 can be improved.

As an alternative to the arrangement of the thinning-out region 31a, referring to fig. 6 and fig. 7, the thinning-out region 31a includes a groove 301 located on a side of the first sub-portion 310 opposite to the display panel 32, and the groove 301 extends in the third direction Z and at least penetrates through the bending region AB. The position of the groove 301 is indicated in dashed lines in fig. 7. It can be understood that the groove penetrates through the bending region at least because the side edge of the first adhesive layer extends from the non-bending region on one side to the non-bending region on the other side along the bending region, and the groove is arranged corresponding to the side edge of the first adhesive layer and at least needs to absorb the bending stress borne by the first adhesive layer on the bending region, so that the groove penetrates through the bending region at least and is used for reducing the stress borne by the first adhesive layer.

Optionally, with continuing to refer to fig. 3 to fig. 6, the opening direction of the groove 301 deviates from the first glue layer 20, so that the flatness of the surface of the first branch portion 310 facing the display panel 32 can be ensured, and the first branch portion 310 is prevented from scratching the display panel 32 and affecting the service life of the display panel 32. In addition, the opening direction of the groove 301 is away from the first adhesive layer 20, so that the first adhesive layer 20 can be prevented from flowing into the groove 301 to affect the deformability of the first subsection 310 when the first adhesive layer 20 is prepared in the process flow. The opening direction of the groove 301 away from the first adhesive layer 20 can also be that the first subsection 310 is attached to a film layer located thereon, for example, the surface of the first subsection 310 facing the display panel 32 can be better attached to the display panel 32, and can timely deform and absorb the stress of the first adhesive layer 20.

Referring to fig. 8, fig. 8 is a schematic view of a portion of the enlarged structure at I in fig. 3.

As shown in fig. 8, in some alternative embodiments, in at least one first section 310: the adhesive tape comprises a first section 311 and a second section 312 (shown by brackets in fig. 8) which are sequentially distributed along the third direction Z, wherein the orthographic projection of the first section 311 in the first direction X is located within the orthographic projection of the first adhesive layer 20 in the first direction X, and the orthographic projection of the second section 312 in the first direction X and the orthographic projection of the first adhesive layer 20 in the first direction X are arranged in a staggered manner.

In these alternative embodiments, the first section 311 and the first glue layer 20 are disposed in an overlapping manner in the first direction X, and the second section 312 and the first glue layer 20 are disposed in a staggered manner in the first direction X, that is, the size of the first subsection 310 is larger, so that the edge of the orthographic projection of the first glue layer 20 in the first direction X can be located within the orthographic projection of the first subsection 310 in the first direction X. When the force applying member 40 such as a roller approaches the edge of the first adhesive layer 20, so that the cover plate 11 provides a downward force to the first adhesive layer 20, the first sub-portion 310 can be deformed to reduce the force applied to the first adhesive layer 20. After the force application assembly 40 passes through the edge of the first adhesive layer 20, the first sub-portion 310 can still absorb the stress of the first adhesive layer 20, so as to reduce the stress near the edge of the first adhesive layer 20, and further improve the deformation of the first adhesive layer 20.

Alternatively, the second sub-portion 320 is provided with the first sub-portions 310 on both sides in the third direction Z, and each first sub-portion 310 is provided corresponding to each second side 22. Optionally, the two first sections 310 are arranged in the same manner.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 9, alternatively, along the first direction X, the orthographic projection of the second side edge 22 is a first axis N, and the thickness of the first sub-portion 310 gradually increases towards both sides along the first axis N. That is, the thinning zone 31a of the first sub-portion 310 is in an inverted V shape, and along the direction from the first section 311 to the second section 312, the thickness of the first section 311 gradually decreases, and the thickness of the second section 312 gradually increases; in a direction from the second section 312 to the first section 311, the thickness of the second section 312 gradually decreases, and the thickness of the first section 311 gradually increases.

In these alternative embodiments, the thickness of the first section 310 increases gradually from the first axis N to both sides thereof, i.e. the thickness of the first section 310 at the position of the first axis N is the smallest, and the deformability is the strongest. The first axis N is disposed to overlap the second side 22 along the first direction X. When the force application assembly 40 applies a force to the first adhesive layer 20, the force applied to the second side edge 22 is the largest, and the deformation capability of the first division portion 310 corresponding to the second side edge 22 is the strongest, so that the force applied to the second side edge 22 can be better absorbed, and the deformation of the first adhesive layer 20 can be better improved.

Referring to fig. 10, fig. 10 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.

As shown in fig. 10, in some alternative embodiments, the first section 311 includes a first surface 311a facing the groove 301, and the second section 312 includes a second surface 312a facing the groove 301; the first surface 311a and the second surface 312a intersect, the display device 100 has a reference plane parallel to the plane of the display panel 32, and the included angle b between the first surface 311a and the reference plane is larger than the included angle a between the second surface 312a and the reference plane.

In these alternative embodiments, the included angle b between the first surface 311a and the reference plane is greater than the included angle a between the second surface 312a and the reference plane, that is, the thickness of the first section 311 in the first direction X where the first surface 311a is located at the symmetrical position with respect to the first axis N is greater than the thickness of the second section 312 where the second surface 312a is located. When the force application assembly 40 applies a force to the first adhesive layer 20, the second side 22 is concave, and the cover plate 11 applies a larger force to the second side 22 in the process of approaching the second side 22. When the force application assembly 40 passes the second side edge 22, the force applied to the first adhesive layer 20 is gradually reduced because the second section 312 has been deformed to absorb a portion of the force. The first section 311 is thicker, so that deformation of the first section 311 can be reduced, stress on the first adhesive layer 20 is more balanced, and supporting capability of the first section 311 can be improved.

Referring to fig. 11, fig. 11 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 11, optionally, the single first sub-portion 310 includes a plurality of grooves 301, and the plurality of grooves 301 are spaced apart in the third direction Z. The grooves 301 reduce the thickness of the first subsection 310 and improve the deformability of the first subsection 310. the plurality of grooves 301 spaced apart enables the first subsection 310 to deform at different locations in the third direction Z.

Referring to fig. 12, fig. 12 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 12, in some alternative embodiments, the grooves 301 located in the first section 311 are first grooves 301a, the grooves 301 located in the second section 312 are second grooves 301b, and the total area of the first grooves 301a is smaller than the total area of the second grooves 301 b. The area of the groove 301 refers to the size of the orthographic projection of the opening of the groove 301 in the first direction X, the total area of the first groove 301a refers to the total area of the plurality of grooves 301 in the first section 311, and the total area of the second groove 301b refers to the total area of the plurality of grooves 301 in the second section 312.

In these alternative embodiments, the total area of the first grooves 301a is smaller than the total area of the second grooves 301b, and thus the deformability of the first section 311 is smaller than that of the second section 312. As mentioned above, when the force applying assembly 40 applies a force to the first adhesive layer 20, the second side 22 is concave, and the force applied to the second side 22 by the cover plate 11 is relatively large in the process of approaching the second side 22. When the force application assembly 40 passes the second side edge 22, the force applied to the first adhesive layer 20 is gradually reduced because the second section 312 has been deformed to absorb a portion of the force. The total area of the first grooves 301a is smaller, so that the deformation of the first section 311 can be reduced, the stress of the first glue layer 20 is more balanced, and the supporting capability of the first section 311 can be improved.

In addition, the first section 311 and the second section 312 each include a plurality of grooves 301, and the plurality of grooves 301 can disperse bending stress, improve toughness of the first sub-portion 310, and improve fracture caused by excessive stress or deformation of the first sub-portion 310.

In some alternative embodiments, continuing to refer to fig. 12, in a single first subsection 310: in the first section 311, the spacing between two adjacent first grooves 301a gradually decreases in a direction in which the first section 311 points to the second section 312. That is, in the direction in which the first section 311 points toward the second section 312, the distance between two adjacent first grooves 301a near the first axis N gradually decreases, and the deformability of the first section 311 gradually increases. Namely, the deformation capability of the first section 311 is stronger closer to the second side edge 22, so that the stress on the second side edge 22 can be better absorbed, and the deformation of the first adhesive layer 20 can be better improved.

Alternatively, among the plurality of first grooves 301a, the plurality of first grooves 301a may have the same or different sizes. Among the plurality of second grooves 301b, the plurality of second grooves 301b may be the same or different in size. Optionally, in order to reduce the manufacturing difficulty of the display device 100, the sizes of the first grooves 301a are the same, and the sizes of the second grooves 301b are the same.

Referring to fig. 13, fig. 13 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 13, the thickness of the first subsection 310 at the location of the first recess 301a is greater than the thickness of the first subsection 310 at the location of the second recess 301 b. The deformability of the first section 311 is therefore less than that of the second section 312. As mentioned above, when the force applying assembly 40 applies a force to the first adhesive layer 20, the second side 22 is concave, and the force applied to the second side 22 by the cover plate 11 is relatively large in the process of approaching the second side 22. When the force application assembly 40 passes the second side edge 22, the force applied to the first adhesive layer 20 is gradually reduced because the second section 312 has been deformed to absorb a portion of the force. The total area of the first grooves 301a is smaller, so that the deformation of the first section 311 can be reduced, the stress of the first glue layer 20 is more balanced, and the supporting capability of the first section 311 can be improved.

Referring to fig. 14, fig. 14 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 14, in some alternative embodiments, the second functional layer 30 further includes a filling portion 330, the filling portion 330 is located in the groove 301, a surface of the filling portion 330 facing away from the display panel 32 is coplanar with a surface of the second sub-portion 320 facing away from the display panel 32, and an elastic modulus of the filling portion 330 is smaller than an elastic modulus of the second sub-portion 320.

In these optional embodiments, the filling part 330 is filled in the groove 301, and the surface of the filling part 330 is flush with the surface of the second sub-part 320, so that the flatness of the surface of the auxiliary functional layer 31 can be improved, and the scratch risk caused by the unevenness of the surface of the auxiliary functional layer 31 to other parts in the display device 100 can be improved. The modulus of elasticity of the filler 330 is less than the modulus of elasticity of the second subsection 320, such that the first subsection 310 is easily deformed.

Referring to fig. 15, fig. 15 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.

In other alternative embodiments, as shown in fig. 15, the thinned region 31a includes a hollowed-out portion 302 located within the first sub-portion 310. That is, by providing the first sub-section 310 in a hollow form to reduce the elastic modulus of the first sub-section 310, the flatness of the surface of the auxiliary functional layer 31 can also be ensured by providing the hollow inside the first sub-section 310.

In some alternative embodiments, please continue to refer to fig. 15, the size of the hollow portion 302 decreases gradually from the first axis N to both sides. That is, the total thickness of the first subsection 310 gradually increases towards both sides of the first axis N, the structural strength of the first subsection 310 gradually increases, and the deformability of the first subsection 310 is strongest at the position of the first axis N. The first axis N and the second side edge 22 are overlapped along the first direction X, when the force application component 40 applies an acting force to the first adhesive layer 20, the stress at the second side edge 22 is the largest, and the deformation capability of the first division portion 310 corresponding to the position of the second side edge 22 is the strongest, so that the stress of the second side edge 22 can be better absorbed, and the deformation of the first adhesive layer 20 is better improved.

Referring to fig. 16, fig. 16 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 16, in other alternative embodiments, a plurality of the hollow portions 302 are distributed at intervals in the first sub-portion 310, and the number of the hollow portions 302 decreases gradually in the direction from the first axis N to both sides. I.e., the first axis N is located at the position where the total thickness of the first subsection 310 is the smallest and the deformability of the first subsection 310 is the strongest. The first sub-portion 310 has the strongest deformation capability corresponding to the position of the second side edge 22, so as to better absorb the stress of the second side edge 22 and better improve the deformation of the first adhesive layer 20.

Referring to fig. 17, fig. 17 is a schematic diagram illustrating a partial enlarged structure at a position I in fig. 3 according to another embodiment.

As shown in fig. 17, in some alternative embodiments, the second functional layer 30 further includes a filling portion 330, and the filling portion 330 is located in the hollow portion 302; the modulus of elasticity of the filler 330 is less than the modulus of elasticity of the second subsection 320. The hollow portion 302 is filled with the filling portion 330, and the elastic modulus of the filling portion 330 is smaller than that of the second subsection 320, so that the first subsection 310 is easier to deform relative to the second subsection 320, and the first subsection 310 can absorb the stress of the second side 22 through deformation.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A display device, comprising, stacked in order along a first direction:

the first functional layer, the first glue layer and the second functional layer;

the second functional layer comprises an auxiliary functional layer, the auxiliary functional layer comprises a first subsection and a second subsection, the first subsection comprises at least one thinned area, the thickness of the thinned area in the first direction is smaller than that of the second subsection in the first direction, and the first direction is perpendicular to the plane of the first functional layer;

wherein at least part of the edge of the orthographic projection of the first glue layer in the first direction is positioned in the orthographic projection of the first subsection in the first direction.

2. The display device according to claim 1, wherein at least a partial edge of an orthographic projection of the first glue layer in the first direction is located within an orthographic projection of the first functional layer in the first direction.

3. The display device according to claim 1, wherein the second functional layer further comprises a display panel between the auxiliary functional layer and the first glue layer;

at least part of the edge of the orthographic projection of the first glue layer in the first direction is positioned in the orthographic projection of the display panel in the first direction.

4. The display device according to claim 3, wherein the display device comprises a bending region and a non-bending region, the non-bending region is located on two opposite sides of the bending region in a second direction, and the second direction is parallel to a plane of the first functional layer;

the first adhesive layer comprises two first side edges opposite to each other in the second direction and two second side edges opposite to each other in a third direction, and the third direction is parallel to the plane where the first functional layer is located and is crossed with the second direction;

an orthographic projection of the second side edge in the first direction is located within an orthographic projection of the first subsection in the first direction.

5. The display device according to claim 4,

the thinning area comprises a groove located on one side of the display panel, wherein the first part faces away from the display panel, and the groove extends in the third direction and at least penetrates through the bending area.

6. The display device according to claim 5, wherein the opening direction of the groove faces away from the first glue layer.

7. The display device according to claim 5,

at least one of the first subsections:

the adhesive tape comprises a first section and a second section which are sequentially distributed along the third direction, wherein the orthographic projection of the first section in the first direction is positioned in the orthographic projection of the first adhesive layer in the first direction, and the orthographic projection of the second section in the first direction and the orthographic projection of the first adhesive layer in the first direction are arranged in a staggered mode.

8. The display device according to claim 7,

along the first direction, the orthographic projection of the second side edge is a first axis, and the thickness of the first part is gradually increased towards two sides along the first axis.

9. The display device according to claim 8,

the first section comprises a first surface facing the groove and the second section comprises a second surface facing the groove;

the first surface and the second surface are intersected, the display device is provided with a reference surface parallel to the plane where the display panel is located, and the included angle between the first surface and the reference surface is larger than that between the second surface and the reference surface.

10. The display device according to claim 7,

a single said first section includes a plurality of said grooves, a plurality of said grooves being spaced apart in said third direction.

11. The display device according to claim 7 or 10,

the grooves in the first section are first grooves, the grooves in the second section are second grooves, and the total area of the first grooves is smaller than that of the second grooves.

12. The display device according to claim 11,

in a single said first subsection:

in the second section, the distance between two adjacent second grooves is gradually reduced along the direction of the second section towards the first section;

and/or, in the first section, the distance between two adjacent first grooves gradually decreases along the direction of the first section pointing to the second section.

13. The display device according to claim 5, wherein the second functional layer further comprises a filling portion, the filling portion is located in the groove, a surface of the filling portion facing away from the display panel is coplanar with a surface of the second sub-portion facing away from the display panel, and an elastic modulus of the filling portion is smaller than an elastic modulus of the second sub-portion.

14. The display device according to claim 1, wherein the thinned region comprises a hollowed-out portion located inside the first sub-portion.

15. The display device according to claim 14,

the display device comprises a bending area and a non-bending area, wherein the non-bending area is positioned on two opposite sides of the bending area in a second direction, and the second direction is parallel to a plane where the first functional layer is positioned;

an orthographic projection of the second side edge in the first direction is located within an orthographic projection of the first subsection in the first direction;

along the first direction, the orthographic projection of the second side edge is a first axis;

the size of the hollow part is gradually reduced towards two sides along the first axis; or the plurality of hollow parts are distributed at intervals in the first part, and the distribution number of the hollow parts is gradually reduced along the first axis in the directions of two sides.

16. The display device according to claim 14, wherein the second functional layer further comprises a filling portion, and the filling portion is located in the hollow portion; the filling portion has a modulus of elasticity less than the modulus of elasticity of the second section.