CN219497258U - Flexible display screen and electronic equipment - Google Patents

Abstract

The utility model provides a flexible display screen and electronic equipment, relates to the technical field of electronic products, and solves the problems that a display surface of the flexible display screen is provided with marks and poor in shock resistance. Specifically, the flexible display screen includes display panel, supporting layer and buffer layer, and display panel has the light-emitting surface, and display panel includes kink. The supporting layer is arranged on one side of the display panel, which is back to the light emitting surface, and comprises a bending supporting part, the orthographic projection of the bending supporting part on the display panel is overlapped with the bending part, and the bending supporting part is provided with a hollow structure 1121a. The buffer layer comprises a first buffer layer, the first buffer layer is arranged between the display panel and the supporting layer in a layer-by-layer mode, at least part of the first buffer layer, which is positioned between the bending part and the bending supporting part, is a shape memory elastomer, and the elastic modulus of the shape memory elastomer is larger than or equal to 0.01MPa. The shape memory elastomer can improve the problem of the impression brought by the hollow structure 1121a and the problem of insufficient impact resistance of the flexible display screen.

Description

Flexible display screen and electronic equipment

Technical Field

The present utility model relates to the field of electronic products, and in particular, to a flexible display screen and an electronic device.

Background

Currently, with the development of electronic device technology, users have a higher and higher demand for electronic devices with large screens and convenient to carry, and thus, electronic devices with foldable display screens have been receiving a great deal of attention. The folding screen can be unfolded when in use, so that a larger display area is provided, and the folding screen is folded to a folding state when not in use, so that the folding screen is convenient for a user to carry.

A foldable flexible display screen generally comprises three parts, namely a cover assembly (cover), a screen assembly (panel) and a support assembly. Wherein the support component comprises a metal support layer and a flexible adhesive tape layer. The metal supporting layer is divided into three areas, namely a left area, a right area and a middle bendable area, the middle bendable part is generally hollowed out partially so as to be bent, so that the surface flatness of the bent area is poor, an upwards-transferred impression is easy to generate, and the impact resistance of the bending area of the module is poor. Therefore, there is a need to solve the problem of poor imprint and impact resistance of flexible display screens.

Disclosure of Invention

The embodiment of the utility model provides a flexible display screen and electronic equipment, which are used for solving the problems of imprint on the display surface of the flexible display screen and poor shock resistance.

In order to achieve the above purpose, the embodiment of the present utility model adopts the following technical scheme:

in a first aspect, the present utility model provides a flexible display screen, including a display panel, a supporting layer, and a buffer layer, where the display panel has a light emitting surface, and the display panel includes a bending portion. The supporting layer is arranged on one side of the display panel, which is opposite to the light emitting surface, and comprises a bending supporting part, the orthographic projection of the bending supporting part on the display panel is overlapped with the bending part, and the bending supporting part is provided with a hollow structure. The buffer layer comprises a first buffer layer, the first buffer layer is arranged between the display panel and the supporting layer, at least the part of the first buffer layer between the bending part and the bending supporting part is a shape memory elastomer, wherein the shape memory elastomer is an elastomer with the elastic modulus being more than or equal to 0.01Mpa.

The shape memory elastomer is a shape memory polymer body, and the shape memory polymer body has an initial shape. After changing its initial condition under certain conditions and fixing, its initial shape can be recovered by stimulation of external conditions (such as heat, electricity, light, chemical induction, etc.) or change over time. The shape memory elastomer material has good rebound resilience and impact force buffering in addition to shape memory function. Therefore, the shape memory elastomer is used as a buffer layer, so that the problem of impression caused by the hollowed-out structure and the problem of insufficient shock resistance of the flexible display screen can be simultaneously improved.

In one possible implementation, the buffer layer further includes a first foam layer disposed between the support layer and the first buffer layer. The first foam layer can further improve the impression brought by the hollow structure, and can further improve the impact resistance of the flexible display screen.

In one possible implementation, the buffer layer further includes a second foam layer, and the second foam layer is disposed between the first buffer layer and the display panel. The second foam layer can further improve the impression brought by the hollow structure, and can further improve the impact resistance of the flexible display screen.

In one possible implementation, the buffer layer further includes a second buffer layer, the second buffer layer is disposed between the support layer and the first foam layer, and at least a portion of the second buffer layer between the bending portion and the bending support portion is a shape memory elastomer. The rebound resilience of the flexible display screen is further improved by arranging the second buffer layer, the first buffer layer and the second buffer layer improve the impression on the display panel simultaneously in the folding and unfolding process of the flexible display screen, and the impact resistance of the flexible display screen is improved by the first foam layer.

In one possible implementation, the elastic modulus of the shape memory elastomer is less than or equal to 1000MPa. The greater the modulus of elasticity, the less likely the shape memory elastomer will deform, and the greater the stiffness, the greater the hardness. In this way, when the elastic modulus is too large, the flexible display screen is not easy to fold. Therefore, the flexible display screen can be folded in a labor-saving manner when the elastic modulus of the shape memory elastomer is smaller than or equal to 1000MPa.

In one possible implementation, the thickness of the buffer layer is greater than or equal to 20 microns and less than or equal to 150 microns. When the thickness of the buffer layer reaches 20 micrometers, the problem of the imprint of the flexible display screen can be effectively solved, and the shock resistance of the flexible display screen can be improved. Due to the development trend of ultrathin flexible display screens, the thickness of the flexible display screen needs to be considered by the buffer layer. Therefore, the thickness of the buffer layer cannot be infinitely increased, and when the thickness of the buffer layer is less than or equal to 150 micrometers, the problem of improving the imprint of the flexible display screen and the development of ultra-thinning of the flexible display screen can be simultaneously satisfied.

In one possible implementation, the thickness of the first buffer layer is greater than or equal to 5 microns and less than or equal to 80 microns. In the folding and unfolding process of the flexible display screen, the hollow structure leaves an impression on the display panel. When the thickness of the first buffer layer between the hollow structure and the display panel reaches 5 micrometers, the imprint can be eliminated better. The performance elimination mark of the initial state can be restored by the first buffer layer. And the thickness of the first buffer layer is smaller than or equal to 80 microns, so that the ultrathin flexible display screen can be simultaneously considered.

In one possible implementation, the thickness of the first foam layer is greater than or equal to 10 microns and less than or equal to 75 microns. The first foam layer can improve the shock resistance of the flexible display screen. In the process that the user used flexible display screen, when pressing the touch-control to the display screen, or electronic equipment highly drops, the impact of external world to display panel can effectively be buffered to first bubble cotton layer, reduces flexible display screen's possibility of damage. And the thickness of the first foam layer is in the range, so that the development of ultrathin flexible display screens can be simultaneously satisfied.

In one possible implementation, the first cushioning layer is in direct contact with the first foam layer and the first foam layer is in direct contact with the second cushioning layer. In one possible implementation, the first cushioning layer is in direct contact with the second foam layer.

The first buffer layer and the second buffer layer are arranged through a coating process, so that the manufacturing cost of the flexible display screen is further reduced. In the process of manufacturing the flexible display screen, the first buffer layer is not required to be attached to the first foam layer, and the second buffer layer is not required to be attached to the bending support portion. Further improving the manufacturing efficiency of the flexible display screen.

In one possible implementation, a first glue layer is provided between the first buffer layer and the second foam layer. Through setting up first glue film, the connection between first buffer layer and the cotton layer of second bubble is more firm.

In one possible implementation, a second glue layer is provided between the first buffer layer and the first foam layer. Through setting up the second glue film, be connected between first buffer layer and the first foam layer more firm.

In one possible implementation, the shape memory elastomer is one of a polyurethane-based material, a polyacrylic-based material, a polysiloxane-based material, and a polyamide-based material. The material body has good rebound resilience, and can better eliminate the impression generated by the hollow structure when the flexible display screen is folded.

In a second aspect, an electronic device is provided, including the flexible display screen, a housing, and a circuit board. The flexible display screen is connected with the casing, and the casing has accommodation space, and the circuit board sets up in accommodation space, and circuit board and flexible display screen electricity are connected.

Because the electronic equipment provided by the embodiment of the utility model comprises the flexible display screen according to any technical scheme, the electronic equipment and the flexible display screen can solve the same technical problems and achieve the same effects.

Drawings

FIG. 1 is a perspective view of an electronic device according to some embodiments of the present utility model;

FIG. 2 is a block diagram of a semi-folded state of an electronic device according to some embodiments of the present utility model;

FIG. 3 is a block diagram of a folded state of an electronic device according to some embodiments of the present utility model;

FIG. 4 is a schematic cross-sectional view of the flexible display screen of FIG. 1 taken along line A-A;

FIG. 5 is a schematic structural view of a support layer according to some embodiments of the present utility model;

FIG. 6 is a schematic view of another structure of a supporting layer according to some embodiments of the present utility model;

FIG. 7 is a schematic view of a flexible display screen according to some embodiments of the present utility model;

FIG. 8 is a schematic view of another structure of a flexible display screen according to some embodiments of the present utility model;

FIG. 9 is a schematic view of another structure of a flexible display screen according to some embodiments of the present utility model;

FIG. 10 is a schematic structural view of a flexible display screen according to some embodiments of the present utility model;

FIG. 11 is a schematic view of another structure of a flexible display screen according to some embodiments of the present utility model;

FIG. 12 is a schematic view of another configuration of a flexible display screen according to some embodiments of the present utility model;

FIG. 13 is a schematic view of another configuration of a flexible display screen according to some embodiments of the present utility model;

FIG. 14 is a schematic view of another configuration of a flexible display screen according to some embodiments of the present utility model;

fig. 15 is a schematic view of another structure of a flexible display screen according to some embodiments of the present utility model.

Detailed Description

In some embodiments, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third", and "a fourth" may explicitly or implicitly include one or more such feature.

In some embodiments, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

It is to be understood that the above orientation or positional relationship as indicated by the terms "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

The utility model provides an electronic device, which is a type of electronic device with a flexible display screen. The electronic device may be a User Equipment (UE) or a terminal device (terminal) or the like. For example, the electronic device may be a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device, an in-vehicle device, a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a terminal in industrial control (industrial control), a terminal in unmanned (self driving), a terminal in remote medical (remote), a terminal in smart grid (smart grid), a terminal in transportation security (transportation security), a terminal in smart city (smart city), a terminal in smart home (smart home). The large-screen display terminal includes, but is not limited to, devices such as a smart screen, a tablet Pc (PAD), a notebook computer, a desktop computer, a television, and a projector.

Referring to fig. 1, fig. 1 is a perspective view of an electronic device 100 according to some embodiments of the present utility model. The present embodiment and the following embodiments are exemplary illustrations using the electronic device 100 as a mobile phone. The electronic device 100 is approximately rectangular plate-like. On this basis, in order to facilitate the description of the embodiments below, an XYZ coordinate system is established, the width direction of the electronic apparatus 100 is defined as the Z-axis direction, the length direction of the electronic apparatus 100 is defined as the X-axis direction, and the thickness direction of the electronic apparatus 100 is defined as the Y-axis direction. It is to be understood that the coordinate system of the electronic device 100 may be flexibly set according to actual needs, which is not specifically limited herein. In other embodiments, the shape of the electronic device 100 may be a square flat plate, a round flat plate, an oval flat plate, or the like, which is not particularly limited herein.

With continued reference to fig. 1, the electronic device 100 includes a housing 20 and a flexible display 11, the flexible display 11 being coupled to the housing 20. The housing 20 may include a first housing 201, a second housing 202, and a hinge 203. The first housing 201 and the second housing 202 are located on both sides of the hinge 203, respectively. The first housing 201 and the second housing 202 are connected to a hinge 203, respectively. For example, the first housing 201 and the second housing 202 may be connected to the hinge 203 by welding or fastening, respectively.

Referring to fig. 2 and fig. 3, fig. 2 is a block diagram illustrating a half-folded state of the electronic device 100 according to some embodiments of the present utility model, and fig. 3 is a block diagram illustrating a folded state of the electronic device 100 according to some embodiments of the present utility model. The first housing 201 and the second housing 202 are rotatable and foldable with respect to the hinge 203, respectively. When the first case 201 and the second case 202 are close to each other and stacked on each other, the electronic apparatus 100 is in a folded state. When the first case 201 and the second case 202 are away from each other from the stacked state, and the first case 201 and the second case 202 are rotated to be unable to rotate, the electronic apparatus 100 is in the unfolded state. The process of the first case 201 and the second case 202 from the folded state to the unfolded state is an unfolding process, and from the unfolded state to the folded state is a folding process. Illustratively, the number of first and second housings 201, 202 may each be one. When the electronic apparatus 100 is in the folded state, the first case 201 and the second case 202 are stacked to take on a two-layer structure.

Referring back to fig. 1, the structure of the flexible display 11 will be described in detail. The flexible display 11 is used to display images, videos, and the like. The flexible display screen 11 includes a first display area 101, a second display area 102, and a third display area 103. The first display area 101 is disposed corresponding to the first housing 201. The second display area 102 is disposed corresponding to the second housing 202. The third display area 103 is disposed corresponding to the hinge 203. The flexible display 11 itself has a bendable property and can be deformed by an external force. When the first case 201 and the second case 202 are in the folded state, the flexible display 11 is in the folded state. The first display area 101 and the third display area 103 of the flexible display 11 are close to each other, and the third display area 103 may be bent into an arc state. When the first case 201 and the second case 202 are in the unfolded state, the flexible display screen 11 is in the unfolded state, so that the first display area 101, the second display area 102, and the third display area 103 take on a flat state.

A light-transmitting cover plate may also be laminated on the flexible display 11. The light-transmitting cover plate is mainly used for protecting and dustproof the flexible display screen 11. The material of the transparent cover plate comprises, but is not limited to, glass. The light-transmissive cover plate faces the user when the user uses the electronic device 100. The light-transmitting cover plate has the functions of preventing impact, scraping, resisting oil stain, preventing fingerprints, enhancing light transmittance and the like.

The flexible display 11 has a touch function. The user can touch the display area of the flexible display screen 11 by hand to execute a corresponding operation instruction. Since the flexible display 11 itself is soft, the display area is deformed and depressed downward when a large compressive stress is applied to the display area by the user's hand. Referring to fig. 4, fig. 4 is a schematic cross-sectional view of the flexible display 11 of fig. 1 taken along line A-A. Therefore, the support layer 112 is laminated on the side of the display panel 111 facing away from the light exit surface 1111. When the display area is recessed, the supporting layer 112 can support the display area to effectively buffer external force, so as to effectively reduce the possibility of deformation of the flexible display screen 11.

Here, the display panel 111 may be an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a micro-light-emitting diode (micro organiclight-emitting diode) display panel, a micro-organic light-emitting diode (QLED) display panel, or a quantum dot light-emitting diode (QLED) display panel.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a support layer 112 according to some embodiments of the utility model. The display panel 111 includes a bending portion 1112, that is, the above-mentioned third display region 103, and the bending portion 1112 is in an arc-shaped state when the electronic device 100 is folded. To facilitate folding of the flexible display screen 11, the support layer 112 includes a bending support 1121. The front projection of the bending support portion 1121 on the display panel 111 overlaps the bending portion 1112. The bending support portion 1121 is provided with a hollow structure 1121a. The hollow structure 1121a is a hollow structure disposed on the bending support 1121 at intervals. When the electronic device 100 is folded, the hollow structure 1121a is more convenient for bending and unfolding the flexible display 11 than the solid structure. However, the hollow structure 1121a may cause poor flatness of the display panel 111, and the hollow structure 1121a may easily leave an imprint on the display panel 111 during the folding and unfolding processes. In addition, the hollow structure 1121a also reduces the impact resistance of the supporting layer 112.

With continued reference to fig. 5, in order to solve the above-mentioned problem, a buffer layer 1122 is disposed between the display panel 111 and the bending support portion 1121. In some embodiments, the buffer layer 1122 may be foam. The foam can alleviate the imprint of the hollowed-out structure 1121a on the display panel 111. However, the foam is porous and has low flatness. Therefore, foam has a general effect of reducing the mark generated by the hollow structure 1121a.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating another structure of the supporting layer 112 according to some embodiments of the utility model. In other embodiments, the filler 1124 is disposed in the hollow region of the hollow structure 1121a, and the filler 1124 may be made of a material with a lower elastic modulus. Filling materials having an elastic modulus of less than 10MPa are generally selected. However, the bending support portion 1121 provided with the filler 1124 has a large deformation amount, and the effect of improving the imprint is not obvious.

Example 1

Referring to fig. 7, fig. 7 is a schematic structural diagram of a flexible display screen 11 according to some embodiments of the present utility model. In order to solve the problem of the hollow structure 1121a causing the impression on the display panel 111, the utility model further provides a flexible display screen 11. The flexible display screen 11 includes a display panel 111, a support layer 112, and a buffer layer 1122. The display panel 111 has a light emitting surface 1111, and the display panel 111 includes a bending portion 1112. The supporting layer 112 is disposed on a side of the display panel 111 opposite to the light emitting surface 1111, the supporting layer 112 includes a bending supporting portion 1121, the front projection of the bending supporting portion 1121 on the display panel 111 overlaps the bending portion 1112, and the bending supporting portion 1121 is provided with a hollow structure 1121a. In some embodiments, the front projection of the bending support portion 1121 on the display panel 111 overlaps the bending portion 1112, and the areas of the bending support portion 1121 and the bending portion 1112 are equal.

Referring to fig. 8 and 9, fig. 8 is a schematic diagram illustrating another structure of a flexible display screen 11 according to some embodiments of the present utility model; fig. 9 is a schematic diagram of another structure of a flexible display 11 according to some embodiments of the present utility model. In other embodiments, the front projection of the bending support portion 1121 on the display panel 111 is partially overlapped with the bending portion 1112. As shown in fig. 8, the forward projection range of the bending support portion 1121 on the display panel 111 is smaller than the bending portion 1112 area. As shown in fig. 9, the front projection range of the bending support portion 1121 on the display panel 111 is larger than the bending portion 1112 area. In the process of manufacturing the flexible display screen 11, certain manufacturing errors exist, and certain errors can exist in the sizes of the bending support portions 1121 and 1112, so that the folding of the flexible display screen 11 can be ensured, and the manufacturing efficiency of the flexible display screen 11 can be improved.

With continued reference to fig. 7, the buffer layer 1122 includes a first buffer layer 1122a, where the first buffer layer 1122a is disposed between the display panel 111 and the supporting layer 112, and at least a portion of the first buffer layer 1122a between the bending portion 1112 and the bending supporting portion 1121 is a shape memory elastomer. The overlapping area of the front projection of the bending portion 1112 on the display panel 111 and the front projection of the bending support portion 1121 on the display panel 111 is a first area, and on this basis, the portion of the first buffer layer 1122a located between the bending portion 1112 and the bending support portion 1121 refers to: the portion of the first buffer layer 1122a overlapping the first region is projected onto the display panel 111. Wherein the shape memory elastomer is an elastomer with an elastic modulus of greater than or equal to 0.01Mpa. At this modulus, the shape memory elastomer has a better resilience.

The shape memory elastomer may be a shape memory polymer body having an initial shape. After changing its initial condition under certain conditions and fixing, its initial shape can be recovered by stimulation of external conditions (such as heat, electricity, light, chemical induction, etc.) or change over time. The shape memory elastomer material has good rebound resilience and impact force buffering in addition to shape memory function. Therefore, the shape memory elastomer as the buffer layer 1122 can simultaneously improve the problem of the imprint caused by the hollowed-out structure 1121a and the problem of insufficient impact resistance of the flexible display screen 11.

Example two

Referring to fig. 10, fig. 10 is a schematic diagram illustrating another structure of a flexible display screen 11 according to some embodiments of the utility model. In some embodiments, the buffer layer 1122 further includes a first foam layer 1122b, where the first foam layer 1122b is disposed between the support layer 112 and the first buffer layer 1122 a. The first foam layer 1122b may further improve the impression of the hollowed-out structure 1121a, and may further improve the impact resistance of the flexible display 11.

Example III

Referring to fig. 11, fig. 11 is a schematic diagram illustrating another structure of a flexible display screen 11 according to some embodiments of the utility model. In some embodiments, the buffer layer 1122 further includes a second foam layer 1122c, where the second foam layer 1122c is stacked between the first buffer layer 1122a and the display panel 111. Referring to fig. 12, fig. 12 is a schematic diagram illustrating another structure of a flexible display screen 11 according to some embodiments of the utility model. In other embodiments, the second foam layer 1122c is stacked between the first buffer layer 1122a and the display panel 111. The second foam layer 1122c can further improve the impression of the hollowed-out structure 1121a, and further improve the impact resistance of the flexible display screen 11.

Example IV

Referring to fig. 13, fig. 13 is a schematic diagram illustrating another structure of a flexible display screen 11 according to some embodiments of the utility model. Based on the second embodiment, the buffer layer 1122 further includes a second buffer layer 1122d, the second buffer layer 1122d is stacked between the support layer 112 and the first foam layer 1122b, and at least a portion of the second buffer layer 1122d between the bending portion 1112 and the bending support portion 1121 is a shape memory elastomer. The orthographic projection of the shape memory elastomer on the support layer 112 may be completely overlapped with the bending support portion 1121 or may be partially overlapped with the bending support portion 1121. Wherein the elastic modulus of the shape memory elastomer is also greater than or equal to 0.01MPa. At this modulus, the shape memory elastomer has a better resilience.

The resilience of the buffer layer 1122 is further improved by providing the second buffer layer 1122d, and in the process of folding and unfolding the flexible display screen 11, the first buffer layer 1122a and the second buffer layer 1122d simultaneously improve the imprint on the display panel 111, and the impact resistance of the flexible display screen 11 is improved by the first foam layer 1122 b.

For the first to fourth embodiments described above, in some embodiments, the elastic modulus of the shape memory elastomer is less than or equal to 1000MPa. The greater the modulus of elasticity, the less likely the shape memory elastomer will deform, and the greater the stiffness, the greater the hardness. In this way, when the elastic modulus is too large, the flexible display 11 is difficult to fold. Therefore, the flexible display screen 11 can be folded with less effort when the elastic modulus of the shape memory elastomer is less than or equal to 1000MPa.

For the first through fourth embodiments described above, in some embodiments, the buffer layer 1122 has a thickness greater than or equal to 20 microns and less than or equal to 150 microns. When the thickness of the buffer layer 1122 reaches 20 micrometers, the problem of marking of the flexible display screen 11 can be effectively improved, and the impact resistance of the flexible display screen 11 can be improved. Due to the trend of ultra-thin flexible display 11, the buffer layer 1122 needs to be compatible with the thickness of the flexible display 11. Therefore, the thickness of the buffer layer 1122 cannot be increased infinitely, and when the thickness of the buffer layer 1122 is 150 μm or less, improvement of the imprint problem of the flexible display screen 11 and development of ultra-thinning of the flexible display screen 11 can be simultaneously satisfied.

For the first to fourth embodiments described above, in some embodiments, the thickness of the first buffer layer 1122a is greater than or equal to 5 micrometers and less than or equal to 80 micrometers. The hollowed-out structure 1121a leaves an impression on the display panel 111 during the folding and unfolding of the flexible display screen 11. When the thickness of the first buffer layer 1122a between the hollow structure 1121a and the display panel 111 reaches 5 micrometers, the imprint can be better removed. The performance elimination mark in the initial state can be recovered by the first buffer layer 1122 a. The thickness of the first buffer layer 1122a is 80 μm or less, which can simultaneously achieve ultra-thin flexible display panel 11.

For the first foam layer 1122b in embodiments two and four, in some embodiments, the thickness of the first foam layer 1122b is greater than or equal to 10 microns and less than or equal to 75 microns. The first foam layer 1122b may enhance the impact resistance of the flexible display screen 11. In the process of using the flexible display screen 11, when the display screen 10 is touched and pressed or the electronic device 100 falls from the height, the first foam layer 1122b can effectively buffer the impact of the outside on the display panel 111, so as to reduce the possibility of damage to the flexible display screen 11. Further, the thickness of the first foam layer 1122b may be within this range, and the development of the ultra-thin flexible display panel 11 may be satisfied.

For embodiment four, in some embodiments, the thicknesses of the first and second buffer layers 1122a and 1122d may be greater than or equal to 5 microns and less than or equal to 35 microns. To ensure ultra-thin flexible display 11. In addition, the thicknesses of the first buffer layer 1122a and the second buffer layer 1122d are within this range, so that the problem of the imprint of the flexible display screen 11 can be improved and the impact resistance of the flexible display screen 11 can be improved at the same time.

In some embodiments, the first cushioning layer 1122a is in direct contact with the first foam layer 1122b, and the first foam layer 1122b is in direct contact with the second cushioning layer 1122 d. The first buffer layer 1122a may be disposed on the surface of the first foam layer 1122b by a coating process. In other embodiments, the second buffer layer 1122d may be disposed on the surface of the bending support portion 1121 through a coating process. The first buffer layer 1122a and the second buffer layer 1122d are provided by a coating process, further reducing the manufacturing cost of the flexible display panel 11. In the process of manufacturing the flexible display 11, the first buffer layer 1122a does not need to be attached to the first foam layer 1122b, and the second buffer layer 1122d does not need to be attached to the bending support portion 1121. Further improving the manufacturing efficiency of the flexible display 11.

Referring to fig. 14, fig. 14 is a schematic diagram illustrating another structure of a flexible display screen 11 according to some embodiments of the utility model. In some embodiments, a first glue layer 113 is disposed between the first cushioning layer 1122a and the second foam layer 1122 c. By providing the first adhesive layer 113, the connection between the first cushioning layer 1122a and the second foam layer 1122c is more stable.

Referring to fig. 15, fig. 15 is a schematic diagram illustrating another structure of the flexible display screen 11 according to some embodiments of the present utility model. In some embodiments, a second glue layer 114 is disposed between the first cushioning layer 1122a and the first foam layer 1122 b. By providing the second adhesive layer 114, the connection between the first cushioning layer 1122a and the first foam layer 1122b is more secure.

The first adhesive layer 113 and the second adhesive layer 114 may be Optical Clear Adhesive (OCA), and the OCA is a double-sided adhesive tape without a base material, and has the characteristics of colorless transparency, high light transmittance (total light transmittance > 99%), high adhesion, high temperature resistance, ultraviolet resistance, and the like, and has a controlled thickness, can provide uniform spacing, and can not generate problems of yellowing, peeling and deterioration after long-term use. For example, the optical adhesive may be at least one of fir glue, methanol glue, unsaturated polyethylene and styrene monomer glue, epoxy resin optical glue, silicone resin glue, acrylic cool photosensitive glue, etc.

In some embodiments, the shape memory elastomer is one of a polyurethane-based material, a polyacrylic-based material, a polysiloxane-based material, and a polyamide-based material. The material body has good rebound resilience, and can better eliminate the mark generated by the hollow structure 1121a when the flexible display screen 11 is folded.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (14)

1. A flexible display screen, comprising:

the display device comprises a display panel, a first display module and a second display module, wherein the display panel is provided with a light emitting surface and comprises a bending part;

the support layer is arranged on one side of the display panel, which is opposite to the light emitting surface, and comprises a bending support part, the orthographic projection of the bending support part on the display panel is overlapped with the bending part, and the bending support part is provided with a hollowed-out structure;

the buffer layer comprises a first buffer layer, the first buffer layer is arranged between the display panel and the supporting layer in a layer-by-layer mode, at least the part of the first buffer layer, which is positioned between the bending part and the bending supporting part, is a shape memory elastomer, and the shape memory elastomer is an elastomer with the elastic modulus being greater than or equal to 0.01Mpa.

2. The flexible display screen of claim 1, wherein the buffer layer further comprises:

the first foam layer is arranged between the supporting layer and the first buffer layer in a layer-by-layer mode.

3. A flexible display screen according to claim 1 or 2, wherein the buffer layer further comprises:

the second foam layer is arranged between the first buffer layer and the display panel in a layer-by-layer mode.

4. The flexible display screen of claim 2, wherein the buffer layer further comprises:

the second buffer layer is arranged between the supporting layer and the first foam layer in a layer-by-layer mode, and at least the part, located between the bending part and the bending supporting part, of the second buffer layer is a shape memory elastomer.

5. A flexible display screen according to claim 1, wherein the shape memory elastomer has an elastic modulus of less than or equal to 1000MPa.

6. A flexible display screen according to claim 1, wherein the thickness of the buffer layer is greater than or equal to 20 microns and less than or equal to 150 microns.

7. A flexible display screen according to claim 1, wherein the thickness of the first buffer layer is greater than or equal to 5 microns and less than or equal to 80 microns.

8. A flexible display screen according to claim 2 or 4, wherein the thickness of the first foam layer is greater than or equal to 10 microns and less than or equal to 75 microns.

9. A flexible display screen as recited in claim 4, wherein,

the first buffer layer is in direct contact with the first foam layer, and the first foam layer is in direct contact with the second buffer layer.

10. A flexible display screen according to claim 3, wherein the first buffer layer is in direct contact with the second foam layer.

11. A flexible display screen according to claim 3, wherein a first glue layer is provided between the first buffer layer and the second foam layer.

12. A flexible display screen according to claim 2 or 4, wherein a second glue layer is provided between the first buffer layer and the first foam layer.

13. A flexible display screen according to claim 1, wherein the shape memory elastomer is one of a polyurethane-based material, a polyacrylic-based material, a polysiloxane-based material, and a polyamide-based material.

14. An electronic device, comprising:

the flexible display screen, housing, and circuit board of any one of claims 1-13;

the flexible display screen is connected with the shell, the shell is provided with an accommodating space, the circuit board is arranged in the accommodating space, and the circuit board is electrically connected with the flexible display screen.