Display device and electronic device

Abstract

The present application discloses a display device and an electronic device. The display device includes at least one bendable display area that can be bent along a bending axis, and a plurality of non-bendable display areas. At least one bendable display area divides the display device into a plurality of non-bendable display areas. The bendable display area includes a side area and a central area. The side areas are disposed on both sides of the central area along the extending direction of the bending axis. The display device includes: a flexible display module and a first support layer. The first support layer is disposed on the backlight side of the flexible display module. The first support layer includes an extending support portion and an avoidance portion located in the bendable display area. The extending support portion is connected to the flexible display module, at least a part of the extending support portion is disposed in the central area, and at least a part of the avoidance portion is disposed in the side area. According to the embodiments provided by the present application, the display device and the electronic device provided by the present application can avoid or reduce the problems of bubbles or delamination of the layer structure generated by bending the display device.

Description

Technical Field

[0001] This application relates to the field of display devices, and particularly to a display device and an electronic device. Background Art

[0002] With the development of technology, electronic devices have been evolving towards larger display areas, thinner and lighter designs, and greater portability. For flexible display modules, with the widespread application of borderless technology, the screen-to-body ratio of electronic devices has approached its limit. To achieve a larger screen display area, electronic devices would need to have a larger volume. To overcome the limitation of the electronic device's volume on the screen display area, a foldable display device is a preferred solution. In the solutions of related technologies, a foldable display device can have a large display area when the screen is unfolded and a small carrying volume when the screen is folded.

[0003] In the process of folding or unfolding an existing display device, the forces on each layer structure are uneven, resulting in the adhesive material filled in the display device being prone to accumulate in some areas. As a result, the structures of each layer are prone to irreversible deformation, and problems such as bubbles and layer structure peeling occur in the display device, affecting the display effect of the display device. Summary of the Invention

[0004] Embodiments of this application provide a display device and an electronic device, aiming to set a first support layer with a suitable size in the display device to reduce or avoid the adhesive material filled in the display device from being prone to accumulate in some areas and improve the display effect of the display device.

[0005] An embodiment of the first aspect of this application provides a display device, which includes at least one bendable display area that can be bent along a bending axis and a plurality of non-bendable display areas. At least one bendable display area divides the display device into a plurality of non-bendable display areas. The bendable display area includes a side area and a central area. The side areas are disposed on both sides of the central area along the extension direction of the bending axis. The display device includes:

[0006] A flexible display module;

[0007] A first support layer, disposed on the backlight side of the flexible display module. The first support layer includes an extended support portion and an avoidance portion located in the bendable display area. The extended support portion is connected to the flexible display module, at least part of the extended support portion is disposed in the central area, and at least part of the avoidance portion is disposed in the side area;

[0008] The display device has a flat state and a bent state. When the display device is in the bent state, the force exerted by the avoidance portion on the flexible display module is less than the force exerted by the extended support portion on the flexible display module.

[0009] According to an embodiment of the first aspect of the present application, in the projection of the extended support portion on the flexible display module, the projected area located in the central region is S1, and the projected area located in the side region is S2. The display area located in the central region of the flexible display module is S3, and the display area located in the side region of the flexible display module is S4, and S1 / S3 > S2 / S4.

[0010] According to an embodiment of the first aspect of the present application, in the projection of the avoidance portion on the flexible display module, the projected area located in the central region is S5, and the projected area located in the side region is S6, and S5 / S3 < S6 / S4.

[0011] According to an embodiment of the first aspect of the present application, (S1 + S2) ≤ 0.2 * (S3 + S4).

[0012] According to an embodiment of the first aspect of the present application, the extended support portion includes a plurality of extended sub - portions, and the plurality of extended sub - portions are spaced apart on both sides of the bending axis, and an avoidance portion is formed between the plurality of extended sub - portions.

[0013] According to an embodiment of the first aspect of the present application, the number of the extended sub - portions is two, and the two extended sub - portions are spaced apart on both sides of the bending axis.

[0014] According to an embodiment of the first aspect of the present application, the first support layer includes a main support portion located in the non - bending display area. One end of the extended sub - portion far from the bending axis is connected to the main support portion, and the edge of the extended sub - portion close to the bending axis is an arc - shaped edge protruding towards the bending axis.

[0015] According to an embodiment of the first aspect of the present application, when the display device is in a flat state, the minimum distance between the two extended sub - portions is L1, and the width of the bending display area along the direction perpendicular to the bending axis is L2, and L1 ≥ 0.2 * L2.

[0016] According to an embodiment of the first aspect of the present application, both ends of the extended support portion are respectively connected to two spaced - apart main support portions.

[0017] According to an embodiment of the first aspect of the present application, the first support layer includes a main support portion located in the non - bending display area, and the extended support portion extends along the direction perpendicular to the bending axis and connects two spaced - apart main support portions.

[0018] According to an embodiment of the first aspect of the present application, the extended support portion includes a first sub - portion extending along a first direction and a second sub - portion extending along a second direction. The first sub - portion and the second sub - portion intersect, and the first direction, the second direction, and the extending direction of the bending axis intersect pairwise.

[0019] According to an embodiment of the first aspect of the present application, the flexible display module includes a display screen body, a back film, and a first buffer layer. The back film is disposed on one side of the first support layer close to the display screen body, and the first buffer layer is disposed between the back film and the display screen body.

[0020] According to an embodiment of the first aspect of the present application, the avoidance portion is an opening provided in the extended support portion. The first support layer further includes an elastic portion. The elastic portion is disposed in the opening and between the second support layer and the back film. One side of the elastic portion is connected to the second support layer, and the other side is separated from the back film.

[0021] According to an embodiment of the first aspect of the present application, the thickness of the extended support portion in the direction from the first support layer to the flexible display module is L3, and the thickness of the elastic portion in the direction from the first support layer to the flexible display module is L4, and L3 = L4.

[0022] According to an embodiment of the first aspect of the present application, the display device further includes an adhesive layer and a protective layer. The adhesive layer bonds the protective layer and the side of the flexible display module away from the first support layer.

[0023] According to an embodiment of the first aspect of the present application, the bent display area further includes a main body area and a connection area. The connection area is disposed on both sides of the main body area in a direction perpendicular to the bending axis. The connection area connects the main body area and the non-bent display area. The adhesive layer includes side surfaces disposed opposite to each other in the extending direction of the bending axis. The adhesive layer has a notch located in the connection area, and the notch is recessed from the side surface of the adhesive layer.

[0024] According to an embodiment of the first aspect of the present application, the width of the notch in the direction perpendicular to the extending direction of the bending axis is L5, and L5 ≥ 100 μm.

[0025] According to an embodiment of the first aspect of the present application, the depth of the notch in the extending direction of the bending axis is L6, and L6 ≤ 300 μm.

[0026] An embodiment of the first aspect of the present application provides an electronic device, including:

[0027] A display device as provided in the first aspect.

[0028] In the display device and the electronic device provided in the embodiments of the present application, by dividing the bent display area into a side area and a central area disposed in the extending direction of the bending axis, and providing an extended support portion in the central area, the first support layer can at least support the flexible display module located in the central area, ensuring the strength of the flexible display module; by providing an avoidance portion in the side area, the peeling phenomenon between adjacent layer structures in the side area is reduced or avoided, the internal stress of the display device during a single bending of the display device is reduced, and the phenomenon of bubbles appearing between the layer structures and peeling between the layer structures in the display device is reduced or avoided. Description of the Drawings

[0029] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0030] Figure 1 It is a schematic structural diagram of a display device in a flat state provided by an embodiment of the first aspect of the present application;

[0031] Figure 2 It is a schematic structural diagram of a display device in a folded state provided by an embodiment of the first aspect of the present application;

[0032] Figure 3 It is a schematic cross-sectional structural diagram of a display device provided by an embodiment of the first aspect of the present application;

[0033] Figure 4 It is a partial plan view structural diagram of a display device provided by an embodiment of the first aspect of the present application;

[0034] Figure 5 It is a partial plan view structural diagram of a display device provided by an embodiment of the first aspect of the present application;

[0035] Figure 6 It is a partial plan view structural diagram of a display device provided by an embodiment of the first aspect of the present application;

[0036] Figure 7 It is a partial plan view structural diagram of a display device provided by an embodiment of the first aspect of the present application;

[0037] Figure 8 It is a schematic cross-sectional structural diagram of a display device provided by an embodiment of the first aspect of the present application;

[0038] Figure 9 It is a partial plan view structural diagram of a display device provided by an embodiment of the first aspect of the present application.

[0039] Description of reference numerals:

[0040] 100, display device; 10, non-bending display area; 20, bending display area; 201, side area; 202, central area; 203, main body area; 204, connection area;

[0041] 1, flexible display module; 11, display screen body; 13, back film; 14, first buffer layer; 15, second buffer layer; 16, polarizing layer;

[0042] 2. The first support layer; 3. The second support layer; 21. The extended support portion; 21a. The extended sub-portion; 21b. The first sub-portion; 21c. The second sub-portion; 22. The avoidance portion; 23. The main body support portion; 24. The elastic portion;

[0043] 4. The protective layer; 5. The adhesive layer; 51. The notch.

[0044] Detailed implementation mode

[0045] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0046] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the elements.

[0047] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "above" or "over" another layer or another region, it may mean directly above the other layer or another region, or there may be other layers or regions between it and the other layer or another region. And if the component is flipped, this layer or region will be "below" or "beneath" the other layer or another region.

[0048] In the related art, during the folding or unfolding process of a display device, the force on each layer structure is uneven, resulting in the glue material filled in the display device being prone to accumulate in some areas, which in turn causes the deformation of each layer structure that cannot be restored easily, and problems such as bubbles in the display device and peeling of adjacent layer structures, affecting the display effect of the display device.

[0049] In the related art, a support layer is disposed in a display device to support each layer structure, improve the overall strength of the display device, and avoid excessive bending of the layer structure and irreversible deformation. However, the support layer will reduce the bending performance of the display device. The inventors found that by patterning the support layer located in the bent display area, the bending performance of the support layer located in the bent display area can be improved, but the adhesive material is still likely to accumulate in the bent display area.

[0050] Existing solutions cannot well solve the technical problems. To solve the above problems, embodiments of the present application provide a display device and an electronic device. The following will describe the embodiments of the display device and the electronic device with reference to the accompanying drawings.

[0051] Please refer to Figure 1 and Figure 2 According to an embodiment of the first aspect of the present application, a display device 100 is provided. The display device 100 includes at least one bent display area 20 that can be bent along a bending axis L, and a plurality of non-bent display areas 10. At least one bent display area 20 divides the display device 100 into a plurality of non-bent display areas 10. The bent display area 20 includes a side area 201 and a central area 202. The side areas 201 are disposed on both sides of the central area 202 along the extension direction of the bending axis L.

[0052] The display device 100 can be used to display images. The display device 100 has a folded state and a flat state. When the display device 100 is folded, the bent display area 20 is at least partially bent into an arc around the bending axis L, and the non-bent display areas 10 connected to the bent display area 20 can be stacked, thereby reducing the volume of the flexible display module 1. As shown in the embodiment of Figure 2 FIG. [Reference numeral not provided], which is a schematic structural diagram of the display device 100 in the folded state. When the bent display area 20 is unfolded, the bent display area 20 and the non-bent display areas 10 connected to the bent display area 20 can be flatly displayed together, thereby obtaining a larger display area. As shown in the embodiment of Figure 1 FIG. [Reference numeral not provided], which is a schematic structural diagram of the display device 100 in the flat state. Optionally, the number of bent display areas 20 can be one, and the number of non-bent display areas 10 is two. The two non-bent display areas 10 are disposed on both sides of the bending axis L.

[0053] The side area 201 is the area in the bent display area 20 that is closer to the edge of the display device 100 than the central area 202. When the display device 100 is in the folded state, the side area 201 and the central area 202 are bent along the bending axis L together.

[0054] Please refer to Figure 3 and Figure 4, the display device 100 includes a flexible display module 1 and a first support layer 2. The first support layer 2 is disposed on the backlight side of the flexible display module 1. The first support layer 2 includes an extended support portion 21 and an avoidance portion 22 located in the bent display area 20. The extended support portion 21 is connected to the flexible display module 1, and at least a part of the extended support portion 21 is disposed in the central area 202, and the avoidance portion 22 is at least partially disposed in the side area 201. When the display device 100 is in a bent state, the acting force of the avoidance portion 22 on the flexible display module 1 is less than the acting force of the extended support portion 21 on the flexible display module 1.

[0055] The flexible display module 1 is a screen body with the ability of light-emitting display. The flexible display module 1 may include a display screen body, and the display screen body includes a flexible substrate, a light-emitting device layer, and a driving circuit layer. The light-emitting device layer includes a plurality of light-emitting units. The side of the light-emitting device layer that emits light outward is the light-emitting side of the flexible display module 1, and the side opposite to the light-emitting side is the backlight side. The driving circuit layer is located on the backlight side of the light-emitting device layer and adjusts the light-emitting brightness of the light-emitting units.

[0056] The material of the flexible substrate includes flexible materials such as polyimide (PI). The light-emitting device layer includes a pixel definition layer and a plurality of light-emitting units. The pixel definition layer includes a plurality of pixel openings, and the light-emitting units are disposed in the pixel openings. Exemplarily, in the embodiments of the present application, organic light-emitting diodes (OLEDs) may be selected to fabricate the above-mentioned respective light-emitting units. Alternatively, the light-emitting units may also be set as micro light-emitting diodes (Micro-LEDs) or quantum dot light-emitting diodes (QLEDs). The driving circuit layer may include a plurality of sub-pixel control units for controlling whether the light-emitting units emit light and the light-emitting duration. The driving circuit layer may include a gate metal layer, a source-drain metal layer, an active layer, etc. The flexible display module 1 of this embodiment may further include an insulating layer, a packaging layer, a planarization layer, etc., which will not be elaborated one by one here.

[0057] The flexible substrate is a flexible film and cannot fully support each layer structure. The layer structures can be the structures disposed on the flexible substrate in the flexible display module 1 or the structures disposed on the flexible display module 1. Therefore, the first support layer 2 is provided to support the flexible display module 1. In some embodiments, the display device 100 further includes a second support layer 3, and the first support layer 2 is disposed on the side of the second support layer 3 close to the flexible display module 1. When the display device 100 is in a folded state, the first support layer 2, the second support layer 3, and the flexible display module 1 are bent together. The second support layer 3 can be a laminated structure formed by copper foil, graphite, foam, etc. The first support layer 2 can be attached between the second support layer 3 and the flexible display module 1 through an optical adhesive. The first support layer 2 can further reinforce the structure of the display device 100 and ensure the bending form of the flexible display module 1. The material of the first support layer 2 includes hard materials such as stainless steel (such as SUS). Stainless steel is a high-modulus material and is not easily deformed when stressed, which can well ensure the bending form of the display device 100 and further reinforce the structure of the flexible display module 1.

[0058] Compared with the first support layer 2 or the flexible display module 1, the second support layer 3 can have a larger size, that is, the projection of the first support layer 2 in the thickness direction of the display device 100 falls on the second support layer 3, and the projection of the flexible display module 1 in the thickness direction of the display device 100 falls on the second support layer 3, so that the second support layer 3 can support all the first support layers 2 and the flexible display module 1. The first support layer 2 can further include a main support portion 23 located in the non-bending display area 10, and the main support portion 23 located in the non-bending display area 10 is used to support the flexible display module 1 located in the non-bending display area 10. The extended support portion 21 located in the bending display area 20 is used to support the flexible display module 1 located in the bending display area 20. The avoidance portion 22 can be an opening formed in the extended support portion 21, and the opening can be an opening penetrating the extended support portion 21 or a groove recessed from the surface of the extended support portion 21 close to the flexible display module 1. The avoidance portion 22 can also be a portion formed by thinning relative to the extended support portion 21. When the display device 100 is bent, the extended support portion 21 in the first support layer 2 has a fixed connection relationship with the flexible display module 1. The extended support portion 21 located inside and bent will apply a force to the flexible display module 1, and the provided avoidance portion 22 can avoid part of the flexible display module 1, thereby reducing the overall force applied by the first support layer 2 to the flexible display module 1, and thus avoiding the accumulation of adhesive in the bending display area 20. This area can also provide a deformation space for some adhesive materials and layer structures, so that the internal stress of the layer structure adjacent to the adhesive material can be released.

[0059] Through the research of the inventors, it is found that during the process of the display device 100 switching from a flat state to a bent state, compared with the glue material being stacked in the central region 202 of the bent display area 20, the glue material stacked in the side region 201 is more likely to cause peeling between the adjacent layer structures in the side region 201.

[0060] In this embodiment, by dividing the bent display area 20 into a side region 201 and a central region 202 arranged along the extending direction of the bending axis L, and arranging an extending support portion 21 in the central region 202, the first support layer 2 can at least support the flexible display module 1 located in the central region 202, ensuring the strength of the flexible display module 1; by arranging an avoidance portion 22 in the side region 201, peeling between the adjacent layer structures in the side region 201 is reduced or avoided, the internal stress of the display device 100 during a single bend of the display device 100 is reduced, and the phenomena of bubbles appearing between the layer structures and peeling between the layer structures in the display device 100 are reduced or avoided.

[0061] In some embodiments, when the display device 100 is in a flat state, in the projection of the extending support portion 21 on the flexible display module 1, the projected area located in the central region 202 is S1, the projected area located in the side region 201 is S2, the display area of the flexible display module 1 located in the central region 202 is S3, the display area of the flexible display module 1 located in the side region 201 is S4, and S1 / S3 > S2 / S4, that is, compared with the side region 201, the flexible display module 1 located in the central region 202 is supported by more extending support portions 21.

[0062] Or in the projection of the avoidance portion 22 on the flexible display module 1, the projected area located in the central region 202 is S5, the projected area located in the side region 201 is S6, and S5 / S3 < S6 / S4, that is, compared with the central region 202, the flexible display module 1 located in the side region 201 corresponds to more avoidance portions 22, so that when the display device 100 is bent, the flexible display module 1 located in the side region 201 is subjected to less force from the first support layer.

[0063] If the area of the extending support portion 21 connected to the flexible display module 1 is too large, the fluidity of the glue material is poor; if the area of the extending support portion 21 connected to the flexible display module 1 is too small, the supporting effect of the extending support portion 21 on the flexible display module 1 is poor. Optionally, (S1 + S2) ≤ 0.2 * (S3 + S4), that is, the projected area of the extending support portion 21 does not exceed 20% of the area of the flexible display module 1 located in the bent display area 20.

[0064] In one embodiment, when the display device 100 is in a flat state, along the direction from the bent display area 20 to the non-bent display area 10, the projected area of the extending support portion 21 on the flexible display module 1 gradually increases; and / or when the display device 100 is in a flat state, along the direction from the central area 201 to the side area 201, the projected area of the extending support portion 21 on the flexible display module 1 gradually decreases.

[0065] The projected area of the extending support portion 21 on the flexible display module 1 is gradually changed along different directions, so as to achieve S1 / S3 > S2 / S4, such that the area of the flexible display module 1 supported by the extending support portion 21 is gradually changed, which is beneficial to the smooth movement of the adhesive material and avoids the extrusion of the adhesive material.

[0066] In one embodiment, the extending support portion 21 includes a plurality of extending sub-portions 21a. The plurality of extending sub-portions 21a are spaced apart on both sides of the bending axis L, and an avoidance portion 22 is formed between the plurality of extending sub-portions 21a. The extending sub-portions 21a being spaced apart on both sides of the bending axis L can be understood as that the extending support portion 21 is not provided in the area corresponding to the bending axis L in the first support layer 2, so that the bending form of the display device 100 can be preferably maintained.

[0067] The plurality of extending sub-portions 21a can be arranged in a layer-point pattern at intervals in the second support layer 3. Optionally, the number of the extending sub-portions 21a is two, and the two extending sub-portions 21a are spaced apart on both sides of the bending axis L. Only arranging two extending sub-portions 21a is convenient for preparing the first support layer 2.

[0068] In some embodiments, one end of the extending sub-portion 21a far from the bending axis L is connected to the main body support portion 23, and the edge of the extending sub-portion 21a close to the bending axis L is an arc-shaped edge protruding towards the bending axis L. The surface of the extending sub-portion 21a for supporting the flexible display module 1 can be semi-circular, fan-shaped, etc. By providing the arc-shaped edge protruding towards the bending axis L, the colloid can move along the arc-shaped edge, reducing or avoiding the accumulation of the colloid at a certain edge of the extending sub-portion 21a.

[0069] The greater the distance between the two extending sub-portions 21a, the weaker the supporting effect of the first support layer 2 on the flexible display module 1 located in the bent display area 20, and the better the bendability of the first support layer 2 along with the display device 100. On the contrary, the smaller the distance between the two extending sub-portions 21a, the stronger the supporting effect of the first support layer 2 on the flexible display module 1 located in the bent display area 20, and the worse the bendability of the first support layer 2 along with the display device 100. Those skilled in the art can set the distance between the two extending sub-portions 21a according to the width of the bent display area 20 perpendicular to the bending axis L.

[0070] Optionally, when the display device 100 is in a flat state, the minimum distance between the two extension parts 21a is L1, and the width of the bent display area 20 perpendicular to the bending axis L is L2, where L1 ≥ 0.2 * L2.

[0071] In some embodiments, the two ends of the extension support part 21 are respectively connected to two spaced-apart main body support parts 23. Exemplarily, two non-bent display areas 10 are arranged on both sides of the bent display area. The two main body support parts 23 respectively support the two non-bent display areas 10. An extension support part 21 is arranged between the two main body support parts 23, and the two ends of the extension support part 21 are respectively connected to the two main body support parts 23, so that the stress of the extension support part 21 can be conducted to the main body support part 23. The extension support part 21 and the main body support part 23 can also be integrally made of the same material.

[0072] Please refer to Figure 5 , in some other embodiments, the extension support part 21 extends in a direction perpendicular to the bending axis L and connects two spaced-apart main body support parts 23. Please refer to Figure 6 , the two side edges of the extension support part 21 arranged along the bending axis L can be straight side edges or arc-shaped edges that are recessed inward.

[0073] Please refer to Figure 7 , in some other embodiments, the extension support part 21 includes a first sub-part 21b extending along the first direction X and a second sub-part 21c extending along the second direction Y. The first sub-part 21b and the second sub-part 21c intersect, and the first direction X, the second direction Y, and the extension direction of the bending axis intersect pairwise.

[0074] Those skilled in the art can understand that in addition to the above-described structure of the extension support part 21, the extension support part 21 can also have other structures, which will not be elaborated here one by one.

[0075] Please refer to Figure 8 , the flexible display module 1 further includes a display screen body 11, a back film 13, and a first buffer layer 14. The back film 13 is arranged on the side of the first support layer 2 close to the display screen body 11, and the first buffer layer 14 is arranged between the back film 13 and the display screen body 11.

[0076] Among them, the display screen body 11 is a device with a display and light-emitting function. In addition to the aforementioned light-emitting device layer, driving circuit layer, etc., the display screen body 11 can also include a second buffer layer 15 and a polarizing layer 16. The second buffer layer 15 is arranged on the side of the light-emitting device layer 11 away from the first support layer 2; the polarizing layer 16 is arranged on the side of the second buffer layer 15 away from the first support layer 2.

[0077] The polarizing layer 16 can be used to improve the contrast of the display device 100 in a bright environment. The second buffer layer 15 is used to adhesively connect the polarizing layer 16 and the light-emitting device layer 11. The second buffer layer 15 can be selected from at least one of a pressure-sensitive adhesive (PSA) and an optically clear adhesive (OCA).

[0078] The back film 13 can be a layer structure made of a metal material or a polymer material. Taking the polymer material as an example, the back film 13 can be selected from at least one of polyethylene terephthalate (PET), polyimide (PI), and cyclo olefin polymer (COP). The first buffer layer 14 is used to adhesively connect the back film 13 and the display device 100 and can be selected from at least one of a pressure-sensitive adhesive (PSA) and an optically clear adhesive (OCA). One side of the first support layer 2 is connected to the second support layer 3, and the other side is connected to the back film 13, so that the back film 13 can be supported on one side of the second support layer 3 through the first support layer 2. When the display device 100 is in a bent state, the extended support portion 21 directly applies a force to the back film 13, and the extended support portion 21 indirectly applies a force to the display screen body 11, the polarizing layer 16, etc.

[0079] In some embodiments, the avoidance portion 22 is an opening provided in the extended support portion 21. The first support layer 2 further includes an elastic portion 24, and the elastic portion 24 is disposed in the opening and between the second support layer 3 and the back film 13. The material of the elastic portion 24 includes elastic materials with superelastic properties such as elastic rubber. The elastic rubber has good toughness and strong compression or tensile deformation ability and is prone to deformation when stressed. By filling the opening with the elastic portion 24 having superelastic properties, the elastic portion 24 can support the flexible display module 1, and at the same time, the elastic portion 24 has good bendability.

[0080] One side of the elastic portion 24 is connected to the second support layer 3, and the other side is separated from the back film 13. Thus, during the bending process of the flexible display module 1, relative movement can occur between the back film 13 and the elastic portion 24 to release the internal stress generated during the bending process.

[0081] To ensure that the elastic part 24 can effectively support the flexible display module 1 when the display device 100 is in a flat state, in some embodiments, the thickness of the first support layer 2 from the first support layer 2 to the flexible display module is L3, and the thickness of the elastic part 24 from the first support layer 2 to the flexible display module is L4, and L3 = L4.

[0082] In some embodiments, the display device 100 further includes an adhesive layer 5 and a protective layer 4. The adhesive layer 5 bonds the protective layer 4 and the side of the flexible display module away from the first support layer 2.

[0083] The protective layer 4 can protect the flexible display module 1 to reduce or avoid external force damage to the flexible display module 1. The adhesive layer 5 can be a transparent optical adhesive to bond the protective layer 4 and the flexible display module.

[0084] Please refer to Figure 9 , in some embodiments, the bent display area 20 further includes a main body area 203 and a connection area 204. The connection area 204 is disposed on both sides of the main body area 203 along a direction perpendicular to the bending axis L. The connection area 204 connects the main body area 203 and the non-bent display area 10. The adhesive layer 5 includes sides disposed opposite to each other along the extending direction of the bending axis L. The adhesive layer 5 has a notch 51 located in the connection area 204, and the notch 51 is recessed from the side of the adhesive layer 5.

[0085] By providing the notch 51 on the adhesive layer 5, the force continuity of the adhesive material at the edge of the adhesive layer 5 is blocked, thereby improving the overall slip performance of the adhesive layer 5, reducing or avoiding the accumulation of the adhesive material, and reducing or avoiding the arching phenomenon of some layer structures caused by the accumulation of the adhesive material.

[0086] The greater the depth of the notch 51 recessed from the side of the adhesive layer 5, the weaker the ability of the adhesive layer 5 to bond the protective layer 4 and the flexible display module 1. The smaller the depth of the notch 51 recessed from the side of the adhesive layer 5, the weaker the blocking ability of the notch 51 to the adhesive material in the adhesive layer 5. Those skilled in the art can set the size of the notch 51 as needed.

[0087] Optionally, the width of the notch 51 along the extending direction perpendicular to the bending axis L is L5, and L5 ≥ 100 μm; optionally, the depth of the notch 51 along the extending direction of the bending axis L is L6, and L6 ≤ 300 μm.

[0088] In a second aspect, the embodiments of the present application further provide an electronic device. The electronic product can be a mobile phone, a tablet computer, a notebook computer, a handheld computer, etc. having the display device 100, and can also be a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc. The embodiments of the present application do not make specific limitations.

[0089] In the electronic device provided in the embodiment of the present application, it has the relevant structure of the foregoing display device 100. For the relevant structure of the display device 100, reference may be made to the display device 100 provided in the foregoing embodiments, and it has all the beneficial effects of the foregoing display device 100, which will not be elaborated herein.

[0090] In accordance with the embodiments of the present application as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments described. Obviously, many modifications and variations can be made according to the above description. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and its modifications based on the present application. The present application is only limited by the claims and their full scope and equivalents.

Claims

1. A display device, characterized in that, The display device includes at least one bendable display area that can be bent along a bending axis, and a plurality of non-bendable display areas. The at least one bendable display area divides the display device into a plurality of the non-bendable display areas. The bendable display area includes a side area and a central area. The side areas are disposed on both sides of the central area along the extending direction of the bending axis. The display device includes: A flexible display module; A first support layer disposed on the backlight side of the flexible display module. The first support layer includes an extending support portion and an avoidance portion located in the bendable display area. The extending support portion is connected to the flexible display module, and at least part of the extending support portion is disposed in the central area, and at least part of the avoidance portion is disposed in the side area; The display device has a flat state and a bent state. When the display device is in the bent state, the acting force of the avoidance portion on the flexible display module is less than the acting force of the extending support portion on the flexible display module; Wherein, the display device further includes an adhesive layer and a protective layer. The adhesive layer bonds the protective layer and the side of the flexible display module away from the first support layer. The bendable display area further includes a main body area and a connection area. The connection area is disposed on both sides of the main body area along a direction perpendicular to the bending axis. The connection area connects the main body area and the non-bendable display area. The adhesive layer has a notch located in the connection area.

2. The display device according to claim 1, wherein When the display device is in the flat state, In the projection of the extending support portion on the flexible display module, the projected area located in the central area is S1, and the projected area located in the side area is S2. The display area of the flexible display module located in the central area is S3, and the display area of the flexible display module located in the side area is S4. S1 / S3 > S2 / S4.

3. The display device according to claim 2, wherein When the display device is in the flat state, in the projection of the avoidance portion on the flexible display module, the projected area located in the central area is S5, and the projected area located in the side area is S6. S5 / S3 < S6 / S4.

4. The display device according to claim 2, characterized in that When the display device is in the flat state, (S1 + S2) ≤ 0.2*(S3 + S4).

5. The display device according to claim 1, wherein When the display device is in the flat state, along the direction from the bendable display area to the non-bendable display area, the projected area of the extending support portion on the flexible display module gradually increases; And / or when the display device is in the flat state, along the direction from the central area to the side area, the projected area of the extending support portion on the flexible display module gradually decreases.

6. The display device according to claim 1, wherein The extending support portion includes a plurality of extending sub-portions. The plurality of extending sub-portions are spaced apart on both sides of the bending axis, and the avoidance portion is formed between the plurality of extending sub-portions.

7. The display device according to claim 6, characterized in that, The number of the extending sub-portions is two, and the two extending sub-portions are spaced apart on both sides of the bending axis.

8. The display device according to claim 6, wherein The first support layer further includes a main support portion located in the non-bending display area. One end of the extending branch portion far from the bending axis is connected to the main support portion, and the edge of the extending branch portion close to the bending axis is an arc-shaped edge protruding towards the bending axis.

9. The display device according to claim 7, wherein When the display device is in a flat state, the minimum distance between the two extending branch portions is L1, the width of the bending display area perpendicular to the bending axis is L2, and L1 ≥ 0.2 * L2.

10. The display device according to claim 8, characterized in that, Both ends of the extending support portion are respectively connected to the two spaced main support portions.

11. The display device according to claim 1, wherein, The first support layer further includes a main support portion located in the non-bending display area. The extending support portion extends in a direction perpendicular to the bending axis and connects the two spaced main support portions.

12. The display device according to claim 1, wherein The extending support portion includes a first sub-portion extending in a first direction and a second sub-portion extending in a second direction. The first sub-portion and the second sub-portion intersect, and the extending directions of the first direction, the second direction, and the bending axis intersect pairwise.

13. The display device according to claim 1, characterized in that, The flexible display module includes a display screen body, a back film, and a first buffer layer. The back film is disposed on one side of the first support layer close to the display screen body, and the first buffer layer is disposed between the back film and the display screen body.

14. The display device according to claim 13, wherein The display device further includes a second support layer, and the first support layer is disposed on one side of the second support layer close to the flexible display module.

15. The display device according to claim 14, characterized in that, The avoidance portion is an opening provided in the extending support portion. The first support layer further includes an elastic portion. The elastic portion is disposed in the opening and located between the second support layer and the back film. One side of the elastic portion is connected to the second support layer, and the other side is separated from the back film.

16. The display device according to claim 15, characterized in that, The thickness of the extending support portion in the direction from the first support layer to the flexible display module is L3, and the thickness of the elastic portion in the direction from the first support layer to the flexible display module is L4, and L3 = L4.

17. The display device according to claim 1, wherein The adhesive layer includes side surfaces oppositely disposed along the extending direction of the bending axis, and the notch is recessed from the side surface of the adhesive layer.

18. The display device according to claim 1, wherein The width of the notch in the direction perpendicular to the extending direction of the bending axis is L5, and L5 ≥ 100 μm.

19. The display device according to claim 1, characterized in that, The depth of the notch in the extending direction of the bending axis is L6, and L6 ≤ 300 μm.

20. An electronic device, characterized in that, Comprising: The display device according to any one of claims 1-19.

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