CN111369897A

CN111369897A - Foldable display screen and foldable electronic equipment

Info

Publication number: CN111369897A
Application number: CN202010306944.7A
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-07-03
Anticipated expiration: 2040-04-17
Also published as: CN111369897B

Abstract

The embodiment of the application provides a foldable display screen and foldable electronic equipment, and foldable electronic equipment includes the casing and sets up the foldable display screen on the casing, and foldable display screen is including the flexible display panel and the glass layer of range upon range of setting, the glass layer is including the first sublayer and the second sublayer of range upon range of setting, first sublayer with at least one in the second sublayer is provided with the space, the space is located first sublayer with between the second sublayer. The embodiment of the application provides can realize not causing under the prerequisite of restriction to the activity of buckling of collapsible display screen, improve the shock resistance and the scratch resistance in surface of collapsible display screen.

Description

Foldable display screen and foldable electronic equipment

Technical Field

The application relates to the technical field of display, in particular to a foldable display screen and a foldable electronic device.

Background

The foldable terminal equipment can meet the requirement of a user on the large size of the screen, and can avoid the problem of inconvenience in carrying caused by the large size of the screen, so that the foldable terminal equipment is widely favored by the user. In the related art, the foldable terminal device generally includes a flexible display, but the existing foldable display is relatively flexible, and the surface of the foldable display has poor impact resistance and is easily damaged.

Disclosure of Invention

The embodiment of the application provides a foldable display screen and a foldable electronic device, and the impact resistance of the foldable display screen can be improved.

The embodiment of the application provides a foldable display screen, including flexible display panel and the glass layer of range upon range of setting, the glass layer is including range upon range of first sublayer and the second sublayer of setting, first sublayer with at least one in the second sublayer is provided with the space, the space is located first sublayer with between the second sublayer.

The embodiment of the application further provides a foldable electronic device, which comprises a shell and a foldable display screen, wherein the foldable display screen is arranged on the shell, and the foldable display screen is as above.

The embodiment of the application can improve the impact resistance and the surface scratch resistance of the foldable display screen on the premise of not limiting the bending activity of the foldable display screen by arranging the glass layer with the gap on the flexible display panel.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of an electronic device in an unfolded state according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an electronic device in a folded state according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a foldable display screen in the electronic device shown in fig. 1.

Fig. 4 is a schematic view of a first configuration of a glass layer in the foldable display screen of fig. 2.

Fig. 5 is a schematic diagram of a second configuration of a glass layer in the foldable display screen of fig. 2.

Fig. 6 is a schematic structural diagram of a first sub-layer in the glass layer shown in fig. 5.

FIG. 7 is a schematic view of a third configuration of a glass layer in the foldable display screen of FIG. 2.

Fig. 8 is a schematic structural view of a second sub-layer in the glass layer shown in fig. 7.

FIG. 9 is a schematic view of a fourth configuration of a glass layer in the foldable display screen of FIG. 2.

Fig. 10 is a schematic structural diagram of a third sub-layer in the foldable display screen shown in fig. 3.

Fig. 11 is a schematic view of the glass layer and the protective layer of the foldable display panel shown in fig. 3.

Fig. 12 is a schematic structural diagram of an organic filling layer in the foldable display panel shown in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device in an unfolded state according to an embodiment of the present disclosure. An electronic device such as electronic device 20 of fig. 1 may be a computing device such as a laptop computer, a computer monitor containing an embedded computer, a tablet, a cellular telephone, a media player, or other handheld or portable electronic device, a smaller device (such as a wristwatch device, a hanging device, an earphone or headphone device, a device embedded in eyeglasses, or other device worn on the head of a user, or other wearable or miniature device), a television, a computer display not containing an embedded computer, a gaming device, a navigation device, an embedded system (such as a system in which an electronic device with a display is installed in a kiosk or automobile), a device that implements the functionality of two or more of these devices, or other electronic devices. In the exemplary configuration of fig. 1, the electronic device 20 is a portable device, such as a cellular telephone, media player, tablet, or other portable computing device. Other configurations may be used for the electronic device 20, if desired. The example of fig. 1 is merely exemplary.

As shown in fig. 1, an electronic device 20 such as that described above may be configured as a foldable device. The foldable device includes a foldable display screen, such as foldable display screen 200 shown in fig. 1. The foldable Display 200 may be a flexible OLED (Organic Light Emitting Diode) Display, a flexible Liquid Crystal Display (LCD), or other types of foldable displays. The foldable display screen 200 is used to display a picture. The foldable display screen 200 may have a regular shape, such as a rectangular parallelepiped structure or a rounded rectangular structure, and the foldable display screen 200 may also have an irregular shape.

For example, referring to fig. 1 and fig. 2, fig. 2 is a schematic structural diagram of an electronic device in a folded state according to an embodiment of the present application, and the electronic device 20 includes a bendable portion and a non-bendable portion. Such as a bendable portion, connected between two non-bendable portions, and the two non-bendable portions can be bent by the bendable portion to switch between the bent state and the unfolded state of the electronic device 20. Thus, when the electronic device 20 is in a folded state (as shown in fig. 2), the occupied space of the electronic device 20 can be made smaller, thereby facilitating the carrying and storage of the electronic device 20; when the electronic device 20 is in the unfolded state (as shown in fig. 1), the electronic device 20 can have a larger display area, thereby facilitating the operation and reading of the electronic device 20 by the user. It should be noted that the bendable portion of the electronic device 20 may have a bending direction, that is, the bending region may be bent in one direction; the bendable portion of the electronic device 20 may have two bending directions, i.e., the bending region may be bent in two directions.

In some related technologies, an organic polymer protective layer, such as a polyimide polymer protective layer, is usually disposed on a surface of the foldable display screen, and although the organic polymer protective layer is easy to fold, the organic polymer protective layer has low hardness and poor impact resistance, and when the organic polymer protective layer collides with a metal object or other hard objects, the protective layer is easily damaged, and scratches are left on a display surface of the foldable display screen, which affects user experience.

Based on the defects in the related art, embodiments of the present application provide a foldable display screen, such as the foldable display screen 200 shown in fig. 3, where fig. 3 is a schematic structural diagram of the foldable display screen in the electronic device shown in fig. 1. The foldable display screen 200 may include a flexible display panel 210, and the flexible display panel 210 may include a display substrate and an encapsulation material, between which an organic light emitter is encapsulated; the liquid crystal material can be packaged between the display substrate and the packaging material, the main board of the electronic device 20 provides voltage for the liquid crystal material, so that the arrangement direction of liquid crystal molecules is changed, and light projected by the backlight module forms images in a display area after the light is subjected to combined action in the display panel, so as to display pictures. The flexible display panel 210 may include a display surface and a non-display surface, and the display surface of the flexible display panel 210 and the non-display surface of the flexible display panel 210 may be disposed opposite to each other.

The foldable display screen 200 may further include a glass layer, such as glass layer 220, and the glass layer 220 may be disposed on the display surface of the flexible display panel 210 in a stacked manner. Glass layer 220 may be a single layer structure, and glass layer 220 may also be a multi-layer structure, for example, glass layer 220 may include two sub-layers stacked together, or three sub-layers stacked together, or other numbers of sub-layers.

The glass layer 220 may include one or more bendable portions and one or more non-bendable portions, the bendable portions are connected to the non-bendable portions, the bendable portions are disposed corresponding to the bendable portions of the electronic device 20, and the non-bendable portions of the glass layer 220 are disposed corresponding to the non-bendable portions of the electronic device 20.

Referring to fig. 4 to 8, fig. 4 is a schematic view showing a first structure of a glass layer in the foldable display screen shown in fig. 2, fig. 5 is a schematic view showing a second structure of the glass layer in the foldable display screen shown in fig. 2, fig. 6 is a schematic view showing a structure of a first sub-layer in the glass layer shown in fig. 5, fig. 7 is a schematic view showing a third structure of the glass layer in the foldable display screen shown in fig. 2, and fig. 8 is a schematic view showing a structure of a second sub-layer in the glass layer shown in fig. 7. Glass layer 220 includes a bendable portion where glass layer 220 is disposed in a plurality of voids, such as void 222, and void 222 is located inside glass layer 220 such that void 222 is not visible from the exterior of glass layer 220. For example, when the glass layer 220 has a single-layer structure, one or more through holes may be formed in the thickness direction of the glass layer 220 to form the gap 222; when the glass layer 220 has a multi-layer structure, one or more through-holes may be formed in the sub-layer to form the voids 222. .

The voids 222 may be regular in shape, such as the voids 222 having a rectangular structure, a trapezoidal structure, etc., and the voids 222 may also be irregular in shape. Voids 222 may reduce the thickness of the bendable portion of glass layer 220. Thus, when the bendable portion of the glass layer 220 is bent, the gap 222 can absorb the stress generated during bending, and does not limit the bending activity of the foldable display 200. Moreover, the non-bendable portion of the glass layer 220 can protect the surface of the flexible display panel 210, and improve the shock resistance of the foldable display screen 200, so that the foldable display screen 200 is not easily damaged. Therefore, the impact resistance and the surface scratch resistance of the foldable display screen 200 are improved on the premise of not limiting the bending movement of the foldable display screen 200.

In addition, it is worth mentioning that, in the electronic device 20 provided in the embodiment of the present application, when the glass layer 220 is folded and unfolded to the planar state, since the bendable portion of the glass layer 220 is provided with the gap 222, the gap 222 can relatively completely release the stress generated in the bending process of the glass layer 220, so that the stress residual in the unfolded glass layer 220 is less, even no stress residual exists, and the problem of stress residual and accumulation after the glass layer 220 is folded and unfolded is avoided. It can be seen that, the electronic device 20 provided in the embodiment of the present application has high flatness of the whole surface in the bent state, and the bending activity is not limited, and the surface does not arch in the state after being bent and unfolded, and the flatness is also high, so that the image display effect of the electronic device 20 in the above two states is good.

Wherein the depth of the void 222 is less than the thickness of the glass layer 220. The depth of the void 222 refers to the dimension of the void 222 in a direction perpendicular to the display surface of the electronic device 20. The depth of the gap 222 may be designed according to the bending curvature of the bendable portion. If the bending radian of the bendable portion is large, the depth of the gap 222 may be set large; if the bending degree of the bendable portion is small, the gap 222 may be set small. It is understood that the greater the curvature of the bendable portion, the greater the stress generated when the bendable portion is bent, and the greater the depth of the gap 222, the more stress can be absorbed.

The cross-sectional shape of the void 222 may be a trapezoidal structure, and the inner sidewall surface of the void 222 may be a planar structure. The cross-sectional shape of the void 222 described in the embodiment of the present application is a cross-sectional shape obtained by cutting the void 222 perpendicular to the longitudinal extending direction of the bendable portion and perpendicular to the display surface direction of the electronic device 20. The longitudinal extending direction of the bendable portion is a direction parallel to the bending line of the bendable portion, and may be any direction within a plane parallel to the display surface of the electronic device 20, for example. The gap of the trapezoidal structure can enable the stress of the bendable part in the bending process to be relatively dispersed at each position of the gap, and the bendable part is prevented from being concentrated at a certain position. It should be noted that the cross-sectional shape of the void 222 is not limited to a trapezoidal structure, for example, the cross-sectional shape of the void 222 may be a rectangular structure, a U-shaped structure, a semicircular structure, a triangular structure, an irregular structure, or the like. The inner sidewall of the gap 222 is not limited to a planar structure, for example, the inner sidewall of the gap 222 may be one or a combination of a stepped structure, an arc structure, a curved structure, or a wavy structure.

In some embodiments, the glass layer 220 includes a bottom wall and a side wall for forming the gap 222, and the bottom wall and the side wall are smoothly transited, for example, the intersecting position of the bottom wall and the side wall may be set to be a rounded corner, so as to avoid concentration of stress at the corner position where the bottom wall and the side wall intersect, so as to reduce loss of fatigue strength of the glass layer 220, which is beneficial to improve the service life of the glass layer 220. When the sectional shape of the void 222 is a trapezoidal structure, the opening width of the void 222 is smaller than the width of the bottom wall. It will be appreciated that the trapezoidal structure has a top side and a bottom side, wherein the length of the top side is less than the length of the bottom side, and wherein the bottom wall of the void 222 serves as the top side of the trapezoidal structure.

As shown in fig. 6 and 8, the planar shape of the gap 222 may be a strip, specifically, a straight strip, or a strip such as a wavy strip. The planar shape of the gap 222 described in the embodiment of the present application is a shape of an orthographic projection of the gap 222 on the display surface of the electronic device 20 when the electronic device 20 is in the unfolded state. The planar shape of the void 222 may be understood as the shape of the opening of the void 222. Note that, the planar shape of the void 222 in the embodiment of the present application is not limited to this, and for example, the planar shape of the void 222 may also be a hole shape, a diamond shape, or an irregular shape (such as a combination of a stripe shape and a hole shape). The holes may be round holes, oval holes, square holes, etc. Particularly, when the planar shape of the gap 222 is a circular hole shape or an elliptical hole shape, the inner side wall surface of the gap 222 does not have a corner or a sharp corner, so that the stress concentration at the corner or the sharp corner is avoided, the stress applied to the gap 222 is more uniform, the bendable part of the glass layer 220 is prevented from being broken after being bent for many times, and the service life of the glass layer 220 is prolonged.

In the embodiment of the present application, the voids 222 in the glass layer 220 can be processed in various ways. For example, the gap 222 may be prepared by removing a material of a portion of the gap 222 where the glass layer 220 is to be formed, such as by using laser etching, plasma etching, or wet etching, and the glass layer 220 prepared by this method has uniform stress and high surface flatness. It should be noted that the gap 222 may also be formed by other processing methods, such as a mechanical cutting method or other forming methods.

With continued reference to fig. 4 to 8, the Glass layer 220 may include a first sub-layer 224 and a second sub-layer 226 stacked together, and the first sub-layer 224 and the second sub-layer 226 may be made of Ultra Thin Glass (UTG), which is an Ultra Thin flexible Glass with a thickness less than or equal to 0.1mm, and has the characteristics of being foldable, flexible, hard, and wear-resistant.

Wherein at least one of the first and

second sub-layers

224, 226 is provided with a void 222, the void 222 being provided between the first and

second sub-layers

224, 226. For example, as shown in FIG. 4, the first sub-layer 224 includes opposing first and

second surfaces

2242 and 2244, with the first surface 2242 being used to form an exterior surface of the foldable display screen 200. The second sublayer 226 includes third and fourth opposing

surfaces

2262, 2264, respectively, the third surface 2262 interfaces with the second surface 2244 when the first and

second sublayers

224, 226 are disposed in a stack. The second surface 2244 is provided with a gap 222a, the third surface is provided with a gap 222b, when the first sublayer 224 and the second sublayer 226 are stacked, the opening of the gap 222a and the opening of the gap 222b are oppositely arranged, and the second surface 2244 is connected with the third surface 2262 to seal the gap 222 inside the glass layer 220. For another example, as shown in fig. 5, the second surface 2244 is provided with a gap 222a, the third surface 2262 is not provided with the gap 222, and when the first sublayer 224 and the second sublayer 226 are stacked, the second sublayer 226 covers the gap 222a to block the gap 222 a. For another example, as shown in fig. 7, the second surface 2244 is not provided with the gap 222a, the third surface 2262 is provided with the gap 222b, and when the first sublayer 224 and the second sublayer 226 are stacked, the first sublayer 224 covers the gap 222b to block the gap 222 b.

The embodiment of the application sets up the glass layer at flexible display panel, can improve the surperficial scratch resistance and the shock resistance of collapsible display screen, be provided with the space through in first sublayer and/or second sublayer in addition, the design on Gemini layer can guarantee that the bulk hardness on glass layer makes the part of can buckling of glass layer be difficult for splitting at the in-process of buckling, produced stress when the part of can buckling can be absorbed in the space moreover, the activity of buckling of the part of having guaranteed effectively can not receive the restriction.

With continued reference to fig. 4, the gap 222a on the second surface 2244 is offset from the gap 222b on the third surface 2262. For example, the second surface 2244 is provided with a gap 222a, the third surface 2262 is provided with a gap 222b, and a part of the projection of the gap 222a on the third surface 2262 is located in the gap 222b, it can be understood that the gap 222a and the gap 222b are partially staggered. Of course, the projection of the gap 222a on the third surface 2262 may be located outside the gap 222b, and the gap 222a and the gap 222b are completely staggered. According to the embodiment of the application, the gap 222 on the second surface 2244 and the gap 222 on the third surface 2262 are staggered, so that the stress of the bendable part in the bending process can be prevented from being too concentrated, the mechanical strength of the bendable part can be improved, and the service life of the glass layer 220 can be prolonged. It should be noted that the second surface 2244 may also be provided with a plurality of gaps 222a, the third surface 2262 may also be provided with a plurality of gaps 222b, and the plurality of gaps 222b and the plurality of gaps 222a are all arranged in a staggered manner.

Fig. 9 is a schematic view of a fourth configuration of the glass layer of the foldable display panel shown in fig. 2, as shown in fig. 9. The first sub-layer 224 may be provided with a plurality of rows of voids 222a parallel to each other, an arrangement direction of the plurality of voids 222a included in each row is parallel to a length extension direction of the bendable portion, and the voids 222a penetrate the first sub-layer 224 in a thickness direction of the first sub-layer 224. The second sub-layer 226 may be provided with a plurality of rows of mutually parallel voids 222b, an arrangement direction of the plurality of voids 222b included in each row is parallel to a length extending direction of the bendable portion, a part or all of the plurality of voids 222b are located at a void position between two rows of voids 222a, and the voids 222b penetrate the second sub-layer 226 in a thickness direction of the second sub-layer 226. It can be understood that the gap a and the gap b are both through-groove structures. The embodiment of the application can enable the stress absorbed by each region in the bendable part to be more uniform by arranging the plurality of rows of the gaps 222a and the gaps 222b which are mutually staggered, so that the bending activity of the electronic device 20 is better supported. The void 22a may not penetrate through the first sub-layer 224 in the thickness direction of the first sub-layer 224, and the void 222b may not penetrate through the second sub-layer 226 in the thickness direction of the second sub-layer 226, where the void a and the void b are both groove structures.

It should be noted that the arrangement density of the plurality of voids 222 in the bendable portion of the glass layer 220 can be designed according to actual needs. If the bending radian of the bendable portion is larger, which indicates that the stress generated when the bendable portion is bent is larger, the arrangement density of the plurality of voids 222 may be designed to be larger, so as to absorb more stress. If the bending radian of the bendable portion is small, which means that the stress generated when the bendable portion is bent is small, the arrangement density of the plurality of voids 222 can be designed to be small.

As shown in fig. 10, fig. 10 is a schematic structural diagram of the third sub-layer in the foldable display screen shown in fig. 3. The foldable display 200 further includes a third sub-layer, such as the third sub-layer 228, and the third sub-layer 228 may be made of an organic filling material, such as a silicone material, an acrylic material, or an epoxy material, or a stretchable material, such as rubber, which has elasticity. The third sub-layer 228 is disposed between the first sub-layer 224 and the second sub-layer 226, for example, the third sub-layer 228 may be in the form of an adhesive that connects the first sub-layer 224 and the second sub-layer 226 together. When the third sub-layer 228 bends at the bendable portion of the glass layer 220, the third sub-layer 228 is stressed to deform so as to absorb stress generated during the bending process, thereby reducing the risk of fracture. The surface of the third sublayer 228 is also provided with one or more protrusions, such as protrusions 2282, the structure and shape of the protrusions 2282 conforming to the structural shape of the void 222, the protrusions 2282 being disposed within the void 222 to fill the void 222 when the third sublayer 228 is assembled between the first sublayer 224 and the second sublayer 226.

Embodiments of the present application may support the location of void 222 by filling one or more protrusions into void 222. In addition, when the electronic device 20 is bent, the stress at the position of the gap 222 is the largest, and the protrusion 2282 arranged at the position of the gap 222 is stretched to absorb the deformation energy of the first sub-layer 224 and the second sub-layer 226 at the position of the gap 222, so that the glass layer 220 at the position of the gap 222 can meet the bending activity of the electronic device 20, the strength of the glass layer 220 at the position of the gap 222 can be increased, and the glass layer 220 at the position of the gap 222 is prevented from being broken due to multiple bending.

As shown in fig. 11, fig. 11 is a schematic structural view of a glass layer and a protective layer in the foldable display screen shown in fig. 3. The foldable display 200 further comprises a protective layer, such as a protective layer 230, wherein the protective layer 230 is disposed on an outer surface of the glass layer 220, such as the protective layer 230 can be disposed on the first surface 2242 of the first sub-layer 224, and the protective layer can be coated on the first sub-layer by vacuum coating, vacuum sputtering, chemical reduction, sol-gel, or the like. The protective layer 230 can protect the outer surface of the glass layer 220, so as to improve the scratch resistance of the glass layer 220, and the protective layer 230 can also increase the transmittance of the glass layer 220, so as to improve the display effect of the foldable display screen 200.

As shown in fig. 12, fig. 12 is a schematic structural diagram of an organic filling layer in the foldable display panel shown in fig. 3. The foldable display 200 further includes an organic filling layer, such as the organic filling layer 240, and the organic filling layer 240 may be made of an organic material, such as a silicone material, an acryl material, or an epoxy material. The organic filling layer 240 is disposed between the second sub-layer 226 and the flexible display panel 210 to connect the second sub-layer 226 and the flexible display panel 210. Wherein the organic filling layer 240 is slightly deformable so that the organic filling layer 240 does not limit the bending movement of the electronic device 20. In order to increase the bonding force between the organic filling layer 240 and the second sub-layer 226, the surface of the organic filling layer 240 is provided with one or more protrusions, such as the protrusion 242, and correspondingly, one or more grooves, such as the groove 2266, are provided on the side of the second sub-layer 226 close to the organic filling layer 240 (or the fourth surface 2264), such that the protrusion 242 is disposed in the groove 2266 when the organic filling layer 240 and the second sub-layer 226 are connected. Compared with the connection of two planes in the related art, the embodiment of the present application may increase the contact area between the organic filling layer 240 and the second sub-layer 226 by embedding the boss in the recess 2266, thereby increasing the bonding force between the second sub-layer 226 and the organic filling layer 240.

The grooves 2266 may be disposed at the bendable portion, and the notch of the grooves 2266 faces the same direction as the bending direction of the bendable portion, so that the thickness of the second sub-layer 226 at the bendable portion is reduced, thereby improving the bending flexibility of the bendable portion. The cross-sectional shape of the grooves 2266 may be a trapezoid structure, and the grooves 2266 with the trapezoid structure may enable the stress of the bendable portion during the bending process to be relatively dispersed at various positions of the grooves 2266, so as to avoid being concentrated at a certain position. It should be noted that the cross-sectional shape of the grooves 2266 is not limited to a trapezoidal structure, for example, the cross-sectional shape of the grooves 2266 may be a rectangular structure, a U-shaped structure, a semicircular structure, a triangular structure, an irregular structure, or the like. In some embodiments, the depth of the recess 2266 in the second sub-layer 226 is greater than the depth of the void 222b in the second sub-layer 226.

With continued reference to fig. 3, the foldable display screen 200 may further include a polarizing layer, such as a polarizing layer 250, the polarizing layer 250 is stacked on the flexible display panel 210, and the polarizing layer 250 is located between the organic filling layer 240 and the flexible display panel 210, for example, the polarizing layer 250 may be implemented in an adhesive form, such as an optical adhesive layer 260 that adheres the polarizing layer 250 to both the organic filling layer 240 and the flexible display panel 210, and the optical adhesive layer 260 may be made of oca (optical Clear adhesive) optical adhesive material or other adhesive layer materials. The polarizing layer 250 may be made of polyvinyl alcohol (PVA) material, for example, the polarizing layer 250 may be a polyvinyl alcohol film made of PVA material. The number of the polarizing layers 250 may be one, and one polarizing layer 250 may be disposed on the display surface of the flexible display panel 210. Of course, a polarizing layer 250 may also be disposed on the non-display surface of the flexible display panel 210. It should be noted that the number of the polarizing layers 250 may also be multiple, for example, two polarizing layers 250, three polarizing layers 250, or other numbers of polarizing layers 250, and the number of the polarizing layers 250 may be set according to practical situations, which is not limited in the embodiment of the present application.

As shown in fig. 3, the foldable display screen 200 further includes a bendable support layer, such as a support layer 270, the support layer 270 is disposed on a side of the flexible display panel 210 facing away from the polarizing layer 250, and the support layer 270 may provide support for the flexible display panel 210, so as to improve the flatness of the entire surface of the electronic device 20. The support layer 270 may be made of a metal material (such as a steel sheet), the support layer 270 may be made of a rubber material, or the support layer 270 may be made of a metal material and a rubber material, for example, the steel sheet may be wrapped in a soft rubber connecting band made of a rubber material. The supporting layer 270 of the embodiment of the present application not only can make the mobile phone bendable, but also can make the bendable portion and the non-bendable portion of the electronic device 20 have higher flatness when the electronic device 20 is in the fully unfolded state or in the half-unfolded state, thereby avoiding affecting the image display of the electronic device 20 and the operation of the user on the electronic device 20.

The electronic device 20 may also be a housing, such as the housing 400 shown in fig. 1, the housing 400 being used to form the exterior outline of the electronic device 20, and the foldable display screen 200 being disposed on the housing 400. The housing 400 may be formed from plastic, glass, ceramic, fiber composite, metal (e.g., stainless steel, aluminum, etc.), other suitable materials, or a combination of any two or more of these materials. The shell 400 may be formed using a one-piece configuration in which some or all of the shell 400 is machined or molded as a single structure, or may be formed using multiple structures (e.g., an inner frame structure, one or more structures that form an outer shell surface, etc.).

The foldable display screen and the foldable electronic device provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A foldable display screen is characterized by comprising a flexible display panel and a glass layer which are arranged in a stacked mode, wherein the glass layer comprises a first sub-layer and a second sub-layer which are arranged in a stacked mode, at least one of the first sub-layer and the second sub-layer is provided with a gap, and the gap is located between the first sub-layer and the second sub-layer.

2. The foldable display screen of claim 1, wherein the first sub-layer comprises a first surface and a second surface opposite to the first surface, the second surface being connected to the second sub-layer, the second surface being provided with one or more of the voids.

3. The foldable display screen of claim 1, wherein the second sublayer comprises third and fourth opposing surfaces, the third surface being connected to the first sublayer and the fourth surface being connected to the flexible display panel, the third surface being provided with one or more of the voids.

4. The foldable display screen of claim 1, wherein the first sub-layer comprises first and second opposing surfaces, the second sub-layer comprises third and fourth opposing surfaces, the third surface being coupled to the first surface and the fourth surface being coupled to the flexible display panel, the first and third surfaces each being provided with one or more of the voids.

5. A foldable display screen in accordance with claim 4, wherein a portion of the projection of the void on the second surface onto the third surface is located within the void on the third surface.

6. A foldable display according to any of claims 1 to 5, wherein the first and second sub-layers are of ultra-thin flexible glass.

7. The foldable display screen of any one of claims 1 to 5, wherein the gap comprises a bottom wall and a side wall surrounding the periphery of the bottom wall, and the side wall and the bottom wall are rounded.

8. The foldable display screen of claim 7, wherein the cross-sectional shape of the void is a trapezoidal structure to evenly distribute stress within the void.

9. The foldable display of claim 8, wherein the glass layer comprises a bottom wall and a side wall forming the void, the void having an opening width less than a width of the bottom wall.

10. The foldable display screen of any one of claims 1 to 5, wherein the glass layer further comprises a third sub-layer, the third sub-layer is disposed between the first sub-layer and the second sub-layer, the third sub-layer is provided with a protrusion, the protrusion is disposed in the gap, and the protrusion is configured to elastically deform when the glass layer is bent to absorb stress generated in the gap.

11. The foldable display screen of any one of claims 1 to 5, wherein the first sub-layer, the second sub-layer and the flexible display panel are sequentially stacked, and a side of the first sub-layer facing away from the second sub-layer is provided with a protective layer to protect the first sub-layer.

12. The foldable display screen according to any one of claims 1 to 5, wherein the first sub-layer, the second sub-layer and the flexible display panel are sequentially stacked, the foldable display screen further comprises an organic filling layer, the organic filling layer is disposed between the second sub-layer and the flexible display panel, a groove is disposed on one side of the second sub-layer close to the flexible display panel, the organic filling layer is provided with a boss, and the boss is disposed in the groove to increase a contact area between the second sub-layer and the organic filling layer.

13. A foldable electronic device, comprising a housing and a foldable display screen, wherein the foldable display screen is disposed on the housing, and wherein the foldable display screen is the foldable display screen of any one of claims 1 to 11.