WO2024131173A1 - 柔性屏和可折叠电子设备 - Google Patents

柔性屏和可折叠电子设备 Download PDF

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Publication number
WO2024131173A1
WO2024131173A1 PCT/CN2023/120323 CN2023120323W WO2024131173A1 WO 2024131173 A1 WO2024131173 A1 WO 2024131173A1 CN 2023120323 W CN2023120323 W CN 2023120323W WO 2024131173 A1 WO2024131173 A1 WO 2024131173A1
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WO
WIPO (PCT)
Prior art keywords
sub
flexible screen
protective layer
spacing
protruding structure
Prior art date
Application number
PCT/CN2023/120323
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English (en)
French (fr)
Inventor
卢泽宇
郑俊威
侯体波
Original Assignee
深圳市锐尔觅移动通信有限公司
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Filing date
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Application filed by 深圳市锐尔觅移动通信有限公司 filed Critical 深圳市锐尔觅移动通信有限公司
Publication of WO2024131173A1 publication Critical patent/WO2024131173A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements

Definitions

  • the present application belongs to the technical field of electronic devices, and specifically relates to flexible screens and foldable electronic devices.
  • the service life of the flexible screen determines the service life of the foldable electronic device, so a protective layer can be added to the flexible screen to improve the protection of the flexible screen and extend its service life.
  • a protective layer can be added to the flexible screen to improve the protection of the flexible screen and extend its service life.
  • the thickness of the protective layer is often thin.
  • ultra-thin glass is used as the protective layer, which has low strength and weak impact resistance, and has limited protective effect.
  • the present application provides a flexible screen and a foldable electronic device.
  • the present application provides a flexible screen, including:
  • a protective layer wherein the protective layer is arranged on one side of the display layer and is used to protect the display layer; the protective layer has a first surface and a second surface arranged opposite to each other, the first surface faces the display layer, the protective layer also has a plurality of protruding structures and a groove located on the first surface, the groove has a bottom wall, the bottom wall includes a first sub-surface and a second sub-surface arranged on two opposite sides of the first sub-surface, the spacing between the first sub-surface and the second surface is less than or equal to the spacing between the second sub-surface and the second surface, a plurality of the protruding structures are arranged at intervals on the second sub-surface, the point farthest from the second surface in each of the protruding structures is the vertex of the protruding structure, the spacing between the vertex of the protruding structure and the second surface is less than or equal to the spacing between the first surface and the second surface, and the spacing between the vertex of the protruding structure and the second
  • the present application provides a foldable electronic device, comprising:
  • a flexible screen comprising a display layer and a protective layer, the protective layer being arranged on one side of the display layer for protecting the display layer; the protective layer having a first surface and a second surface arranged opposite to each other, the first surface facing the display layer, the protective layer further having a plurality of protruding structures and a groove located on the first surface, the groove having a bottom wall, the bottom wall comprising a first sub-surface and a second sub-surface arranged on opposite sides of the first sub-surface, the spacing between the first sub-surface and the second surface being less than or equal to the spacing between the second sub-surface and the second surface, a plurality of the protruding structures being arranged at intervals on the second sub-surface, the point of each protruding structure farthest from the second surface being the vertex of the protruding structure, the spacing between the vertex of the protruding structure and the second surface being less than or equal to the spacing between the first surface and the second surface, and the spacing between the vertex of the
  • a foldable middle frame is used to support the flexible screen and to drive the flexible screen to be folded or flattened, wherein the protective layer of the flexible screen is farther away from the foldable middle frame than the display layer.
  • FIG. 1 is a schematic diagram of an exploded view of a flexible screen in the related art.
  • FIG. 2 is a schematic diagram of the structure of a protective layer in the related art.
  • FIG3 is a schematic diagram of the structure of a flexible screen provided in one embodiment of the present application.
  • Fig. 4 is a schematic cross-sectional view of Fig. 3 along the A-A direction.
  • FIG. 5 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in one embodiment of the present application.
  • FIG6 is a cross-sectional schematic diagram of a protective layer provided in one embodiment of the present application.
  • FIG. 7 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 8 is a partial top view of a protective layer provided in one embodiment of the present application.
  • FIG. 9 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 10 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 11 is a partial top view of a protective layer provided in another embodiment of the present application.
  • FIG. 12 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 13 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 14 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 15 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 16 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 17 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a foldable electronic device in an unfolded state provided in one embodiment of the present application.
  • FIG19 is a schematic diagram of the composition of a foldable electronic device provided in one embodiment of the present application.
  • Protective layer-100 (100'), first surface-101, second surface-102, protruding structure-10, vertex-11, groove-20 (20'), bottom wall-21, first sub-surface-211, second sub-surface-212, side wall-22, first part-31, second part-32, third part-33, display layer-201 (201'), flexible screen-200 (200'), foldable middle frame-300, foldable electronic device-400, RF circuit-410, memory-420, input unit-430, display unit-440, sensor-450, audio circuit-460, speaker-461, microphone-462, WiFi module-470, processor-480, power supply-490.
  • An embodiment of the present application provides a flexible screen, comprising: a display layer; and a protective layer, wherein the protective layer is arranged on one side of the display layer for protecting the display layer; the protective layer has a first surface and a second surface arranged opposite to each other, the first surface faces the display layer, the protective layer also has a plurality of protruding structures and a groove located on the first surface, the groove has a bottom wall, the bottom wall comprises a first sub-surface and a second sub-surface arranged on opposite sides of the first sub-surface, the spacing between the first sub-surface and the second surface is less than or equal to the spacing between the second sub-surface and the second surface, a plurality of the protruding structures are arranged at intervals on the second sub-surface, the point farthest from the second surface in each of the protruding structures is the vertex of the protruding structure, the spacing between the vertex of the protruding structure and the second surface is less than or equal to the spacing between the first surface and the second
  • the sum of the orthographic projection areas of the plurality of protrusion structures on the second surface gradually decreases or gradually increases.
  • the distribution density of the protrusion structures gradually decreases or gradually increases.
  • the spacing between adjacent protrusion structures gradually decreases or gradually increases.
  • the width of the protruding structure gradually decreases or gradually increases.
  • the length of the protruding structure gradually decreases.
  • the height of the protruding structure gradually decreases, gradually increases or remains unchanged.
  • the ratio of the area of the orthographic projection of the groove on the second surface to the area of the second surface is 1:2.5 to 1:4.
  • the area ratio of the orthographic projection of the first sub-surface on the second surface to the orthographic projection of the second sub-surface on the second surface is 2 to 3.
  • the first sub-surface is a plane or a curved surface, and the curved surface protrudes toward the second surface.
  • the second sub-surface is a plane or a curved surface; the curved surface protrudes toward the second surface, or the curved surface protrudes away from the second surface.
  • the spacing between the first surface and the second surface is 100 ⁇ m to 500 ⁇ m; the spacing between the first sub-surface and the second surface is 30 ⁇ m to 60 ⁇ m; and in the direction from the second sub-surface to the first sub-surface, the size of the first sub-surface is 20 mm to 40 mm.
  • the spacing between adjacent protruding structures is 10 ⁇ m to 50 ⁇ m; in a direction parallel to the first surface and perpendicular to the second sub-surface to the first sub-surface, the size of the protruding structure is 10 ⁇ m to 1 mm; The height of the protruding structure may be 40 ⁇ m to 500 ⁇ m.
  • the protrusion structures are arranged in an array on the second sub-surface.
  • the material of the protective layer includes glass.
  • the flexible screen further includes a filling layer, and the filling layer is arranged in the groove and completely fills the gap in the groove.
  • the filling layer is also arranged between the first surface and the flexible screen.
  • the material of the filling layer includes at least one of polyurethane, acrylate and epoxy resin.
  • An embodiment of the present application provides a foldable electronic device, comprising: a flexible screen, wherein the flexible screen comprises a display layer and a protective layer, wherein the protective layer is arranged on one side of the display layer for protecting the display layer; the protective layer comprises a first surface and a second surface arranged opposite to each other, wherein the first surface faces the display layer, and the protective layer further comprises a plurality of protruding structures and a groove located on the first surface, wherein the groove has a bottom wall, wherein the bottom wall comprises a first sub-surface and a second sub-surface arranged on opposite sides of the first sub-surface, wherein the spacing between the first sub-surface and the second surface is less than or equal to the spacing between the second sub-surface and the second surface, and wherein the plurality of protruding structures and the second sub-surface are arranged on opposite sides of the first sub-surface.
  • the raised structures are arranged at intervals on the second sub-surface, and the point farthest from the second surface in each of the raised structures is the vertex of the raised structure.
  • the distance between the vertex of the raised structure and the second surface is less than or equal to the distance between the first surface and the second surface, and along the direction from the second sub-surface to the first sub-surface, the distance between the vertex of the raised structure and the second surface is equal or gradually decreases; and a foldable middle frame, which is used to carry the flexible screen and to drive the flexible screen to be folded or flattened, wherein the protective layer of the flexible screen is farther away from the foldable middle frame than the display layer.
  • the flexible screen can be bent around a folding axis, and the connection direction of the first sub-surface and the second sub-surface is perpendicular to the stacking direction of the protective layer and the display layer, and is perpendicular to the extension direction of the folding axis.
  • Foldable electronic devices have received extensive attention due to their large display area and portability.
  • Flexible screens are indispensable display devices for foldable electronic devices.
  • a protective layer is often added to the flexible screen to increase the service life.
  • the thickness of the protective layer is relatively thin, and the protective effect is limited.
  • Figure 1 is a schematic diagram of the decomposition of the flexible screen in the related art
  • Figure 2 is a schematic diagram of the structure of the protective layer in the related art
  • the flexible screen 200' includes a display layer 201' and a protective layer 100' arranged on one side of the display layer 201'
  • the protective layer 100' is an unequal thickness structure
  • the surface of the protective layer 100' has a groove 20', so that the thickness of the protective layer 100' at the groove 20' is thinned, thereby improving the bending performance at the groove 20', and the thickness of the protective layer 100' in the area outside the groove 20' is relatively thick, which improves the impact resistance, so that the protective layer 100' can not only meet the requirements of the folding and unfolding of the flexible screen 200', but also play a good protective role.
  • the side of the protective layer 100' facing the flexible screen 200' is not a flat surface, and there is a significant visual difference between the groove 20' and the area outside the groove 20', thereby producing obvious light and shadow traces, affecting the use of the flexible screen 200'.
  • the present application provides a flexible screen 200, in which the protective layer 100 visually has smoother light and shadow, reduces the problem of light and shadow traces, thereby avoiding the impact on the use of the flexible screen 200, and the protective layer 100 can meet the requirements of folding and unfolding of the flexible screen 200, and can play a good protective role, thereby improving the performance of the flexible screen 200.
  • Figure 3 is a schematic diagram of the structure of a flexible screen provided by an embodiment of the present application
  • Figure 4 is a schematic diagram of a cross-section in the A-A direction of Figure 3
  • Figure 5 is an enlarged view of the protective layer in the dotted area of Figure 4 provided by an embodiment of the present application
  • the flexible screen 200 includes a display layer 201 and a protective layer 100
  • the protective layer 100 is arranged on one side of the display layer 201, and is used to protect the display layer 201
  • the protective layer 100 has a first surface 101 and a second surface 102 arranged opposite to each other, the first surface 101 faces the display layer 201
  • the protective layer 100 also has a plurality of protruding structures 10 and a groove 20 located on the first surface 101
  • the groove 20 has a bottom wall 21, and the bottom wall 21 includes a first sub-surface 211 and second sub-surfaces 212 arranged on opposite sides of the first sub-surface 211, the spacing between the first sub-surface 211 and the second surface
  • the present application arranges a plurality of raised structures 10 on the edge portion of the groove 20.
  • the raised structures 10 are capable of refracting and reflecting light, thereby making the visual connection between the groove 20 in the protective layer 100 and the area outside the groove 20 smoother without obvious step-like marks, etc., so that protective layers 100 of unequal thickness visually have the same effect as those of equal thickness.
  • the arrangement of the groove 20 ensures the bending performance of the protective layer 100 to meet the use of the flexible screen 200, and the area outside the groove 20 is thicker, which improves the strength and impact resistance of the protective layer 100, thereby increasing the service life of the flexible screen 200 and facilitating the use of the flexible screen 200.
  • the flexible screen 200 can be bent around the folding axis a to achieve folding or unfolding, so that it can be used in the foldable electronic device 400.
  • the second sub-surface 212 is provided on opposite sides of the first sub-surface 211, and the connection direction between the first sub-surface 211 and the second sub-surface 212 is perpendicular to the stacking direction of the protective layer 100 and the display layer 201, and perpendicular to the extension direction of the folding axis a.
  • the stacking direction of the protective layer 100 and the display layer 201 is defined as the first direction
  • the extension direction of the folding axis a is defined as the second direction.
  • Figure 6 is a cross-sectional schematic diagram of a protective layer provided in one embodiment of the present application, wherein the protective layer 100 includes a first portion 31, a second portion 32 and a third portion 33 connected in sequence, the second portion 32 is recessed in the first portion 31 and in the third portion 33 along the thickness direction of the protective layer 100 to form a groove 20, and the direction in which the first portion 31, the second portion 32 and the third portion 33 are connected in sequence is perpendicular to the first direction and the second direction.
  • the protective layer 100 is a structure of unequal thickness, and due to the formation of the groove 20, the first part 31 and the second part 32, as well as the second part 32 and the third part 33 have obvious visual light changes, such as obvious step-like marks, so that the connection between the first part 31 and the second part 32, and the connection between the second part 32 and the third part 33 have obvious visual dividing lines and light and shadow marks, which is not conducive to the use of the protective layer 100 in the flexible screen 200; the inventors of the present application set a plurality of raised structures 10 on the surface of the area where the second part 32 is close to the first part 31 and the area where the second part 32 is close to the third part 33, to form a visual transition zone, and the difference in light and shadow changes is reduced, so that the protective layer 100 can visually present a more consistent light and shadow visual effect, which is conducive to the use of the flexible screen 200.
  • the protective layer 100 is provided with the groove 20 so that the thickness of the second portion 32 in the first direction is less than the thickness of the first portion 31 and the third portion 33, thereby improving the bending performance of the second portion 32, improving the service life and reliability, and being conducive to the use of the protective layer 100 in the flexible screen 200, and being able to meet the use requirements of the flexible screen 200 for folding and unfolding, and not It will increase the weight of the flexible screen 200 too much; the thickness of the first part 31 and the third part 33 is greater than the thickness of the second part 32, so the strength and impact resistance of the first part 31 and the third part 33 are better, thereby increasing the service life and reliability of the protective layer 100, and further improving the performance of the flexible screen 200.
  • the groove 20 has a bottom wall 21, the bottom wall 21 includes a first sub-surface 211 and a second sub-surface 212 arranged on opposite sides of the first sub-surface 211, and a plurality of convex structures 10 are arranged at intervals on the second sub-surface 212, so that there is a transition zone formed by a plurality of convex structures 10 between the first surface 101 and the first sub-surface 211 of the first part 31 and a transition zone formed by a plurality of convex structures 10 between the first surface 101 and the first sub-surface 211 of the third part 33, and through the reflection and refraction of light on the convex structure 10, the light and shadow change difference between the first surface 101 and the first sub-surface 211 of the first part 31 and the first surface 101 and the first sub-surface 211 of the third part 33 is weakened, so that the protective layer 100 presents a more consistent light and shadow visual effect, and improves the light and shadow traces.
  • the depth of the groove 20 is the maximum distance between the bottom wall 21 and the first surface 101 along the first direction
  • the width of the groove 20 is the dimension along the direction perpendicular to the first direction and perpendicular to the second direction
  • the length of the groove 20 is the dimension along the second direction.
  • the groove 20 includes a bottom wall 21 and a side wall 22.
  • the side wall 22 may be substantially perpendicular to the second surface 102. It can be understood that the acute angle between the side wall 22 and the second surface 102 is 85° to 90°.
  • Figure 7 is an enlarged view of the protective layer in the dotted area of Figure 4 provided in another embodiment of the present application, wherein the distance between the first surface 101 and the second surface 102 is D0, the distance between the first sub-surface 211 and the second surface 102 is D1, the distance between the second sub-surface 212 and the second surface 102 is D2, and the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is D3.
  • the spacing D1 between the first sub-surface 211 and the second surface 102 is less than or equal to the spacing D2 between the second sub-surface 212 and the second surface 102, thereby ensuring that the thickness of the edge area of the third portion 33 is greater than or equal to the thickness of the middle area of the third portion 33, avoiding the problem that the thickness of the middle area of the third portion 33 is greater than the thickness of the edge area, causing the first sub-surface 211 to protrude from the second sub-surface 212 and unable to avoid light and shadow traces; the spacing D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is less than or equal to the spacing D0 between the first surface 101 and the second surface 102, thereby avoiding the problem of aggravated light and shadow traces caused by the protruding structure 10 from the first surface 101.
  • the first sub-surface 211 has a second sub-surface 212 on both opposite sides, as shown in FIG. 5 , the first sub-surface 211 has a second sub-surface 212 on both left and right sides.
  • the spacing D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal or gradually decreases, which means that in the direction from the second sub-surface 212 on the left to the first sub-surface 211 (i.e., in the horizontal direction from left to right in FIG.
  • the spacing D3 between the vertex 11 of the protruding structure 10 on the left second sub-surface 212 and the second surface 102 is equal or gradually decreases, and in the direction from the second sub-surface 212 on the right to the first sub-surface 211 (i.e., in the horizontal direction from right to left in FIG. 5 ), the spacing D3 between the vertex 11 of the protruding structure 10 on the right second sub-surface 212 and the second surface 102 is equal or gradually decreases.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal or gradually decreases, so that a slow light and shadow transition is formed between the first surface 101 and the first sub-surface 211, thereby weakening the light and shadow traces of the protective layer 100;
  • the curved surface needs to be very smooth to achieve a smooth transition, so it is necessary to increase the size of the curved surface in the direction from the first surface 101 to the first sub-surface 211, so that the protective layer 100
  • the size design of the groove 20 is limited by the size of the arc surface, which is not conducive to the development and utilization of protective layers 100 of different sizes and specifications.
  • the present application sets up spaced raised structures 10 to fully reflect and refract the light to improve the light and shadow traces, and the raised structure 10 can match the protective layers 100 and grooves 20 of different sizes and specifications, which is beneficial to the use of the protective layer 100.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal in the direction from the second sub-surface 212 to the first sub-surface 211.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 decreases in the direction from the second sub-surface 212 to the first sub-surface 211.
  • there are second sub-surfaces 212 on both sides of the first sub-surface 211, and the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 on the two second sub-surfaces 212 may change the same or may change differently.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 on the two second sub-surfaces 212 may change the same in the direction from the second sub-surface 212 to the first sub-surface 211.
  • the distance D3 between the vertex 11 of the protruding structure 10 on the second sub-surface 212 on one side of the first sub-surface 211 and the second surface 102 is equal, and the distance D3 between the vertex 11 of the protruding structure 10 on the second sub-surface 212 on the opposite side of the first sub-surface 211 and the second surface 102 gradually decreases.
  • the sum of the orthogonal projection areas of the plurality of protruding structures 10 on the second surface 102 gradually decreases or gradually increases. It can be understood that along the direction from the second sub-surface 212 to the first sub-surface 211, the sum of the orthogonal projection areas of the plurality of protruding structures 10 on the second surface 102 refers to the sum of the orthogonal projection areas of the plurality of protruding structures 10 on the second surface 102 in the same range along the direction from the second sub-surface 212 to the first sub-surface 211.
  • the orthogonal projection area of the protruding structure 10 on the second surface 102 gradually changes, which can further enhance the transition effect and make the transition smoother, thereby further weakening the traces of light and shadow.
  • the orthogonal projection area of the protruding structure 10 on the second surface 102 gradually decreases, and the spacing D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, and the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, and the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, and the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases.
  • the protective layer 100 satisfies at least one of the following conditions: along the direction from the second sub-surface 212 to the first sub-surface 211, the distribution density of the protruding structures 10 gradually decreases or gradually increases; along the direction from the second sub-surface 212 to the first sub-surface 211, the spacing between adjacent protruding structures 10 gradually decreases or gradually increases; along the direction from the second sub-surface 212 to the first sub-surface 211, the width of the protruding structures 10 gradually decreases or gradually increases; along the direction from the second sub-surface 212 to the first sub-surface 211, the length of the protruding structures 10 gradually decreases.
  • the orthographic projection surface of multiple protruding structures 10 on the second surface 102 along the direction from the second sub-surface 212 to the first sub-surface 211 is The sum of the areas gradually decreases or increases.
  • the distribution density of the protruding structures 10 is the number of protruding structures 10 per unit area;
  • the spacing between adjacent protruding structures 10 is the distance between adjacent protruding structures 10 in the direction from the second sub-surface 212 to the first sub-surface 211;
  • the width of the protruding structure 10 is the dimension in the direction perpendicular to the first direction and perpendicular to the second direction, which can also be understood as the dimension in the direction parallel to the first surface 101 and perpendicular to the second sub-surface 212 to the first sub-surface 211;
  • the length of the protruding structure 10 is the dimension in the second direction, that is, the dimension in the direction parallel to the first surface 101 and perpendicular to the second sub-surface 212 to the first sub-surface 211
  • the sum of the orthographic projection areas of the plurality of protruding structures 10 on the second surface 102 gradually changes.
  • the gradual increase may be a gradient increase, a linear increase, or an irregular increase
  • the gradual decrease may be a gradient decrease, a linear decrease, or an irregular decrease.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, and the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal; at this time, along the direction from the second sub-surface 212 to the first sub-surface 211, the distribution density of the protruding structure 10 gradually decreases, or the distance between adjacent protruding structures 10 gradually increases, or the width of the protruding structure 10 gradually decreases, or the length of the protruding structure 10 gradually decreases, or the above changes occur simultaneously.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, and the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases; at this time, along the direction from the second sub-surface 212 to the first sub-surface 211, the distribution density of the protruding structure 10 gradually decreases, or the distance between adjacent protruding structures 10 gradually increases, or the width of the protruding structure 10 gradually decreases, or the length of the protruding structure 10 gradually decreases, or the above changes occur simultaneously.
  • FIG. 8 is a partial top view of a protective layer provided in one embodiment of the present application, wherein the distribution density of the protruding structures 10 gradually decreases in the direction from the second sub-surface 212 to the first sub-surface 211, so that the orthographic projection area of the protruding structures 10 on the second surface 102 gradually decreases, further improving the light and shadow traces of the protective layer 100.
  • the spacing D3 between the apex 11 of the protruding structure 10 and the second surface 102 can be equal or gradually change; the sizes of the multiple protruding structures 10 can be the same or different; the spacing between adjacent protruding structures 10 can be the same or different.
  • the spacing D3 between the apex 11 of the protruding structure 10 and the second surface 102 can be equal or gradually change; the sizes of the multiple protruding structures 10 can be the same or different; the spacing between adjacent protruding structures 10 can be the same or different.
  • the spacing D3 between the apex 11 of the protruding structure 10 and the second surface 102 is equal and the spacing between adjacent protruding structures 10 gradually increases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the raised structures 10 may remain unchanged or may vary; the sizes of the multiple raised structures 10 may be the same or different.
  • the distance D3 between the vertex 11 of the raised structure 10 and the second surface 102 gradually decreases and the distance between adjacent raised structures 10 gradually increases, so that the orthographic projection area of the raised structure 10 on the second surface 102 gradually decreases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the raised structures 10 may remain unchanged or may vary; the sizes of the multiple raised structures 10 may be the same or different.
  • FIG9 is another embodiment of the present application provided in FIG4 .
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal and the width of the protruding structure 10 gradually decreases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the protruding structure 10 can be constant or variable; the spacing between adjacent protruding structures 10 can be the same or different; the lengths of multiple protruding structures 10 can be the same or different.
  • FIG. 10 is an enlarged view of the protective layer in the dotted area of FIG. 4 provided by another embodiment of the present application.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases and the width of the protruding structure 10 gradually decreases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the protruding structure 10 can be constant or variable; the spacing between adjacent protruding structures 10 can be the same or different; the lengths of multiple protruding structures 10 can be the same or different.
  • FIG. 11 is a partial top view of the protective layer provided by another embodiment of the present application.
  • the length of the protruding structure 10 gradually decreases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually decreases, further improving the light and shadow traces of the protective layer 100.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 can be equal or gradually change; the distribution density of the protruding structure 10 can be constant or change; the distances between adjacent protruding structures 10 can be the same or different; the widths of multiple protruding structures 10 can be the same or different.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, and the spacing D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal; at this time, along the direction from the second sub-surface 212 to the first sub-surface 211, the distribution density of the protruding structure 10 gradually increases, or the spacing between adjacent protruding structures 10 gradually decreases, or the width of the protruding structure 10 gradually increases, or the above changes occur simultaneously.
  • the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, and the spacing D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases; at this time, along the direction from the second sub-surface 212 to the first sub-surface 211, the distribution density of the protruding structure 10 gradually increases, or the spacing between adjacent protruding structures 10 gradually decreases, or the width of the protruding structure 10 gradually increases, or the above changes occur simultaneously.
  • the distribution density of the protruding structures 10 gradually increases along the direction from the second sub-surface 212 to the first sub-surface 211, so that the orthographic projection area of the protruding structures 10 on the second surface 102 gradually increases, further improving the light and shadow traces of the protective layer 100.
  • the spacing D3 between the apex 11 of the protruding structure 10 and the second surface 102 can be equal or gradually change; the sizes of multiple protruding structures 10 can be the same or different; the spacing between adjacent protruding structures 10 can be the same or different.
  • the spacing D3 between the apex 11 of the protruding structure 10 and the second surface 102 is equal and the spacing between adjacent protruding structures 10 gradually decreases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the protruding structures 10 may be constant or variable; the sizes of the multiple protruding structures 10 may be the same or different.
  • FIG. 13 is an enlarged view of the protective layer in the dotted area of FIG. 4 provided in another embodiment of the present application.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases and the distance between adjacent protruding structures 10 gradually decreases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the protruding structures 10 may be constant or variable; the sizes of the multiple protruding structures 10 may be the same or different.
  • FIG. 14 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided by another embodiment of the present application.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 is equal and the width of the protruding structure 10 gradually increases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the protruding structure 10 can be constant or variable; the spacing between adjacent protruding structures 10 can be the same or different; the lengths of multiple protruding structures 10 can be the same or different.
  • the distance D3 between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases and the width of the protruding structure 10 gradually increases, so that the orthographic projection area of the protruding structure 10 on the second surface 102 gradually increases, further improving the light and shadow traces of the protective layer 100.
  • the distribution density of the protruding structure 10 can be constant or variable; the distances between adjacent protruding structures 10 can be the same or different; the lengths of multiple protruding structures 10 can be the same or different.
  • the first sub-surface 211 may be a plane or a curved surface, wherein the curved surface protrudes toward the second surface 102.
  • the first sub-surface 211 is a plane.
  • FIG15 is an enlarged view of the protective layer in the dotted area of FIG4 provided in another embodiment of the present application, wherein the first sub-surface 211 is a curved surface, and the curved surface protrudes toward the second surface 102.
  • the second sub-surface 212 may be a plane or a curved surface, wherein the curved surface protrudes toward the second surface 102 or the curved surface protrudes away from the second surface 102.
  • the second sub-surface 212 is a plane.
  • the second sub-surface 212 is a curved surface, and the curved surface protrudes toward the second surface 102.
  • the second sub-surface 212 is set to be a curved surface, and the curved surface protrudes away from the second surface 102.
  • the first sub-surface 211 is a plane, and the second sub-surface 212 is a plane.
  • the first sub-surface 211 is a plane, and the second sub-surface 212 is a curved surface.
  • the first sub-surface 211 is a curved surface, and the second sub-surface 212 is a plane.
  • first sub-surface 211 is a curved surface and the first sub-surface 211 protrudes toward the second surface 102
  • the second sub-surface 212 is a curved surface and the second sub-surface 212 protrudes away from the second surface 102
  • first sub-surface 211 is a curved surface and the first sub-surface 211 protrudes toward the second surface 102
  • the second sub-surface 212 is a curved surface and the second sub-surface 212 protrudes toward the second surface 102. This can form a smoother visual transition and further improve the light and shadow traces.
  • the second sub-surface 212 when the second sub-surface 212 is a plane, the second sub-surface 212 Parallel to or at an angle with the second surface 102.
  • the second sub-surface 212 is a plane and parallel to the second surface 102.
  • FIG16 is an enlarged view of the protective layer in the dotted area of FIG4 provided in another embodiment of the present application, wherein the second sub-surface 212 is a plane and has an angle with the second surface 102.
  • the angle may be less than or equal to 20°, 30°, 40°, 45°, 50°, 60° or 70°, etc.
  • the second sub-surface 212 may be a plane or an arc surface
  • the height of the protruding structure 10 may be equal or may vary; when the distance between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 may be equal or may vary.
  • the height of the protruding structure 10 is the dimension in the first direction.
  • the second sub-surface 212 is a plane and parallel to the second surface 102.
  • the height of the protruding structure 10 is also equal along the direction from the second sub-surface 212 to the first sub-surface 211; when the distance between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 also gradually decreases along the direction from the second sub-surface 212 to the first sub-surface 211.
  • FIG16 is an enlarged view of the protective layer in the dotted line area in FIG4 provided in another embodiment of the present application, wherein the second sub-surface 212 is a plane and has an angle with the second surface 102.
  • the height of the protruding structure 10 gradually increases along the direction from the second sub-surface 212 to the first sub-surface 211; when the distance between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 may gradually decrease or remain unchanged along the direction from the second sub-surface 212 to the first sub-surface 211.
  • the second sub-surface 212 is a curved surface and protrudes toward the second surface 102.
  • the height of the protruding structure 10 gradually increases along the direction from the second sub-surface 212 to the first sub-surface 211; when the distance between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 may gradually decrease or remain unchanged along the direction from the second sub-surface 212 to the first sub-surface 211.
  • the second sub-surface 212 is a curved surface and protrudes away from the second surface 102.
  • the height of the protruding structure 10 gradually increases along the direction from the second sub-surface 212 to the first sub-surface 211; when the distance between the vertex 11 of the protruding structure 10 and the second surface 102 gradually decreases along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 may gradually decrease, remain unchanged, or gradually increase along the direction from the second sub-surface 212 to the first sub-surface 211.
  • the height of the protruding structure 10 gradually decreases, gradually increases, or remains unchanged.
  • the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is less than or equal to the distance between the first surface 101 and the second surface 102; along the direction from the second sub-surface 212 to the first sub-surface 211, the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is equal to or gradually decreases; along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 remains unchanged.
  • FIG. 17 is an enlarged view of the protective layer in the dotted area in FIG. 4 provided in another embodiment of the present application, wherein in the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 remains unchanged and the sum of the orthographic projection areas of the plurality of protruding structures 10 on the second surface 102 remains unchanged.
  • the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is less than or equal to the distance between the first surface 101 and the second surface 102; along the direction from the second sub-surface 212 to the first sub-surface 211, the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is equal or gradually decreases; along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 gradually decreases.
  • the sum of the orthographic projection areas of the plurality of protruding structures 10 on the second surface 102 remains unchanged, gradually increases, or gradually decreases.
  • the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is less than or equal to the distance between the first surface 101 and the second surface 102; along the direction from the second sub-surface 212 to the first sub-surface 211, the distance between the vertex 11 of the protruding structure 10 and the second surface 102 is equal or gradually decreases; along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protruding structure 10 gradually increases.
  • the ratio of the orthographic projection of the groove 20 on the second surface 102 to the area of the second surface 102 is 1:2.5 to 1:4. In this way, the proportion of thicker areas can be further guaranteed, and the strength and impact resistance of the protective layer 100 can be improved.
  • the ratio of the orthographic projection of the groove 20 on the second surface 102 to the area of the second surface 102 may be, but is not limited to, 1:2.5, 1:2.8, 1:3, 1:3.4, 1:3.5, 1:3.7 or 1:4, etc. In one embodiment of the present application, the ratio of the orthographic projection of the groove 20 on the second surface 102 to the area of the second surface 102 is 1:2.5 to 1:3.
  • the ratio of the orthographic projection of the groove 20 on the second surface 102 to the area of the second surface 102 is 1:3 to 1:4.
  • the length of the groove 20 is equal to the length of the second surface 102
  • the area ratio of the orthographic projection of the groove 20 on the second surface 102 to the second surface 102 is the ratio of the width of the groove 20 to the width of the second surface 102.
  • the length of the second surface 102 is the dimension along the second direction.
  • the area ratio of the orthographic projection of the first sub-surface 211 on the second surface 102 to the orthographic projection of the second sub-surface 212 on the second surface 102 is 2 to 3. This is conducive to providing a sufficient area of the protruding structure 10 to improve the light, enhance the light and shadow transition effect brought by the protruding structure 10, thereby further improving the light and shadow traces and improving the visual consistency of the protective layer 100.
  • the area of the orthographic projection of the second sub-surface 212 on the second surface 102 includes the area of the orthographic projection of the two second sub-surfaces 212 on the opposite sides of the first sub-surface 211 on the second surface 102.
  • the area ratio of the orthographic projection of the first sub-surface 211 on the second surface 102 to the orthographic projection of the second sub-surface 212 on the second surface 102 can be, but is not limited to, 2, 2.2, 2.4, 2.5, 2.6, 2.8 or 3, etc.
  • the area ratio of the orthographic projection of the first sub-surface 211 on the second surface 102 to the orthographic projection of the second sub-surface 212 on the second surface 102 is 2 to 2.5. In another embodiment of the present application, the area ratio of the orthographic projection of the first sub-surface 211 on the second surface 102 to the orthographic projection of the second sub-surface 212 on the second surface 102 is 2 to 2.5. The area ratio is 2.5 to 3.
  • the length of the first sub-surface 211 is equal to the length of the second sub-surface 212
  • the area ratio of the orthographic projection of the first sub-surface 211 on the second surface 102 to the orthographic projection of the second sub-surface 212 on the second surface 102 is the ratio of the width of the first sub-surface 211 to the width of the second sub-surface 212.
  • the length of the first sub-surface 211 is the dimension along the second direction
  • the length of the second sub-surface 212 is the dimension along the second direction.
  • the spacing D0 between the first surface 101 and the second surface 102 is 100 ⁇ m to 500 ⁇ m, which can improve the strength and impact resistance of the protective layer 100 without increasing the thickness and weight of the flexible screen 200 too much.
  • the spacing D0 between the first surface 101 and the second surface 102 may be, but is not limited to, 100 ⁇ m, 150 ⁇ m, 200 ⁇ m, 280 ⁇ m, 300 ⁇ m, 360 ⁇ m, 400 ⁇ m or 500 ⁇ m, etc.
  • the spacing D0 between the first surface 101 and the second surface 102 may be 100 ⁇ m to 250 ⁇ m.
  • the spacing D0 between the first surface 101 and the second surface 102 may be 250 ⁇ m to 500 ⁇ m.
  • the first surface 101 and the second surface 102 are planes. In one embodiment, the first surface 101 and the second surface 102 are planes and perpendicular to the first direction.
  • the spacing D1 between the first sub-surface 211 and the second surface 102 is 30 ⁇ m to 60 ⁇ m, which not only ensures the bending performance of the protective layer 100, but also reduces the weight of the protective layer 100, thereby helping to reduce the weight of the flexible screen 200.
  • the spacing D1 between the first sub-surface 211 and the second surface 102 may be, but is not limited to, 30 ⁇ m, 33 ⁇ m, 35 ⁇ m, 40 ⁇ m, 45 ⁇ m, 47 ⁇ m, 50 ⁇ m, 55 ⁇ m or 60 ⁇ m, etc.
  • the spacing D1 between the first sub-surface 211 and the second surface 102 may be 30 ⁇ m to 45 ⁇ m.
  • the spacing D1 between the first sub-surface 211 and the second surface 102 may be 40 ⁇ m to 55 ⁇ m. In another embodiment of the present application, the spacing D1 between the first sub-surface 211 and the second surface 102 may be 47 ⁇ m to 60 ⁇ m.
  • the width of the first sub-surface 211 is the size of the first sub-surface 211 in the direction from the second sub-surface 212 to the first sub-surface 211.
  • the width of the first sub-surface 211 is 20 mm to 40 mm, which is conducive to improving the bending performance of the protective layer 100.
  • the width of the first sub-surface 211 may be, but is not limited to, 20 ⁇ m, 24 ⁇ m, 25 ⁇ m, 27 ⁇ m, 30 ⁇ m, 35 ⁇ m, 38 ⁇ m, 39 ⁇ m or 40 ⁇ m, etc.
  • the width of the first sub-surface 211 is 25 mm to 35 mm.
  • the width of the first sub-surface 211 is 25 mm to 38 mm.
  • the height, length and width of the protruding structure 10 are set as required, and the height, length and width of multiple protruding structures 10 may be the same or different.
  • the protruding structure 10 may be, but is not limited to, a cylinder, a cuboid, a cube, a cone, etc.
  • the protruding structure 10 may be arranged in an array on the second sub-surface 212, that is, arranged regularly on the second sub-surface 212, and the protruding structure 10 may also be arranged irregularly on the second sub-surface 212.
  • the spacing between the vertex 11 of the protruding structure 10 and the second surface 102 is less than or equal to the spacing between the first surface 101 and the second surface 102; as shown in FIG5, the spacing between the vertex 11 of the protruding structure 10 and the second surface 102 is equal to the spacing between the first surface 101 and the second surface 102; as shown in FIG16, the spacing between the vertex 11 of the protruding structure 10 and the second surface 102 is less than the spacing between the first surface 101 and the second surface 102.
  • the height of the protrusion structure 10 may be 40 ⁇ m to 500 ⁇ m. In one embodiment, the height of the protrusion structure 10 may be 60 ⁇ m to 450 ⁇ m. In another embodiment, the height of the protrusion structure 10 may be In one embodiment of the present application, along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protrusion structure 10 gradually decreases from 300 ⁇ m to 500 ⁇ m to 40 ⁇ m to 300 ⁇ m. In one embodiment, along the direction from the second sub-surface 212 to the first sub-surface 211, the height of the protrusion structure 10 gradually decreases from 350 ⁇ m to 450 ⁇ m to 50 ⁇ m to 200 ⁇ m.
  • the spacing between adjacent protrusion structures 10 is 10 ⁇ m to 50 ⁇ m.
  • the spacing between adjacent protrusion structures 10 may be, but is not limited to, 10 ⁇ m, 20 ⁇ m, 25 ⁇ m, 30 ⁇ m, 40 ⁇ m or 50 ⁇ m.
  • the spacing between adjacent protrusion structures 10 is 10 ⁇ m to 25 ⁇ m.
  • the spacing between adjacent protrusion structures 10 is 25 ⁇ m to 50 ⁇ m.
  • the length of the protruding structure 10 is 10 ⁇ m to 1 mm.
  • the length of the protruding structure 10 may be, but is not limited to, 10 ⁇ m, 150 ⁇ m, 200 ⁇ m, 350 ⁇ m, 400 ⁇ m, 500 ⁇ m, 600 ⁇ m, 700 ⁇ m, 800 ⁇ m or 900 ⁇ m, etc.
  • the length of the protruding structure 10 is 10 ⁇ m to 200 ⁇ m.
  • the length of the protruding structure 10 is 100 ⁇ m to 500 ⁇ m.
  • the length of the protruding structure 10 is 300 ⁇ m to 700 ⁇ m.
  • the length of the protruding structure 10 gradually decreases from 10 ⁇ m to 500 ⁇ m to 500 ⁇ m to 1 mm. In one embodiment, along the direction from the second sub-surface 212 to the first sub-surface 211 , the height of the protrusion structure 10 gradually decreases from 100 ⁇ m to 350 ⁇ m to 500 ⁇ m to 700 ⁇ m.
  • the material of the protective layer 100 may be, but is not limited to, plastic, glass, sapphire, etc., to meet the strength and bending performance.
  • the visible light transmittance of the protective layer 100 is greater than 85%, thereby avoiding blocking the display effect of the display layer 201.
  • the material of the protective layer 100 includes glass.
  • the light and shadow traces of the protective layer 100 are improved by setting a raised structure 10, which is also beneficial to the strengthening, so that during strengthening, the raised structure 10 helps to further reduce the difference in expansion between the groove 20 area and the area outside the groove 20, avoid distortion problems caused by excessive differences in expansion, and improve the preparation yield of strengthened glass.
  • the protective layer 100 can be obtained by etching, or by integral mold forming.
  • the display layer 201 is used to make the flexible screen 200 emit light and realize the display function; the display layer 201 can be but is not limited to an organic display layer 201, such as an active matrix organic light emitting diode, etc.
  • the flexible screen 200 further includes a filling layer, which is disposed in the groove 20 and completely fills the gap in the groove 20.
  • the filling layer completely fills the gap between the protruding structures 10. In this way, the setting of the protruding structure 10 does not affect the display effect of the display layer 201.
  • the filling layer can also be disposed between the first surface 101 and the flexible screen 200. In this case, the filling layer can also play a buffering role, further improving the service life of the flexible screen 200.
  • the material of the filling layer can include but is not limited to at least one of polyurethane, acrylate, and epoxy resin.
  • the present application also provides a foldable electronic device 400, comprising the flexible screen 200 in any of the above embodiments.
  • the above flexible screen 200 has excellent service life and performance, thereby increasing the service life of the foldable electronic device 400, while also improving the performance of the foldable electronic device 400 and improving product competitiveness.
  • FIG. 18 is a schematic diagram of a foldable electronic device in an unfolded state provided by an embodiment of the present application, wherein the foldable electronic device 400 includes a flexible screen 200 and a foldable middle frame 300, and the foldable middle frame 300 is used to carry the flexible screen 200 and the foldable middle frame 300.
  • the flexible screen 200 is provided with a protective layer 100 which is further away from the foldable middle frame 300 than the display layer 201.
  • the flexible screen 200 can be attached to the foldable middle frame 300 by adhesive.
  • the foldable electronic device 400 of the embodiment of the present application may be, but is not limited to, a portable foldable device with a variable display screen size such as a mobile phone, a tablet computer, an e-reader, and a laptop computer.
  • the foldable electronic device 400 in this embodiment is only a form of a foldable electronic device 400 applied by the flexible screen 200, and should not be understood as a limitation on the foldable electronic device 400 provided in the present application, nor should it be understood as a limitation on the flexible screen 200 provided in each embodiment of the present application.
  • FIG. 19 is a schematic diagram of the composition of a foldable electronic device provided in one embodiment of the present application.
  • the structure of the foldable electronic device 400 may include an RF circuit 410, a memory 420, an input unit 430, a display unit 440, a sensor 450, an audio circuit 460, a WiFi module 470, a processor 480, and a power supply 490.
  • the RF circuit 410, the memory 420, the input unit 430, the display unit 440, the sensor 450, the audio circuit 460, and the WiFi module 470 are respectively connected to the processor 480; the power supply 490 is used to provide power to the entire foldable electronic device 400.
  • the RF circuit 410 is used to receive and send signals; the memory 420 is used to store data instruction information; the input unit 430 is used to input information, which may specifically include a touch panel and other input devices such as operation buttons; the display unit 440 may include a display screen, etc.; the sensor 450 includes an infrared sensor, a laser sensor, etc., for detecting user approach signals, distance signals, etc.; the speaker 461 and the microphone 462 are connected to the processor 480 through the audio circuit 460 for receiving and sending sound signals; the WiFi module 470 is used to receive and transmit WiFi signals; the processor 480 is used to process data information of the foldable electronic device 400.

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Abstract

一种柔性屏（200），包括：显示层（201）以及保护层（100），保护层（100）设置于显示层（201）的一侧，用于保护显示层（201）；保护层（100）具有相对设置的第一表面（101）和第二表面（102），第一表面（101）面向显示层（201），保护层（100）还具有多个凸起结构（10）以及位于第一表面（101）的凹槽（20），凹槽（20）具有底壁（21），底壁（21）包括第一子表面（211）以及设置在第一子表面（211）相对两侧的第二子表面（212），第一子表面（211）与第二表面（102）之间的间距小于或等于第二子表面（212）与第二表面（102）之间的间距，多个凸起结构（10）间隔设置在第二子表面（212），每一凸起结构（10）中距离第二表面（102）最远的点为凸起结构（10）的顶点（11），凸起结构（10）的顶点（11）与第二表面（102）之间的间距小于或等于第一表面（101）和第二表面（102）之间的间距，沿第二子表面（212）至第一子表面（211）的方向上，凸起结构（10）的顶点（11）与第二表面（102）之间的间距相等或逐渐减小。

Description

柔性屏和可折叠电子设备 技术领域
本申请属于电子设备技术领域，具体涉及柔性屏和可折叠电子设备。
背景技术
柔性屏的使用寿命决定了可折叠电子设备的使用寿命，因此可以在柔性屏中增设保护层来提高对柔性屏的保护，延长其使用寿命。然而，为了满足可折叠电子设备折叠和展开状态的切换，保护层的厚度往往较薄，例如采用超薄玻璃作为保护层，其强度低，抗冲击性能弱，起到的保护作用有限。
发明内容
有鉴于此，本申请提供了一种柔性屏和可折叠电子设备。
第一方面，本申请提供了一种柔性屏，包括：
显示层；以及
保护层，所述保护层设置于所述显示层的一侧，用于保护所述显示层；所述保护层具有相对设置的第一表面和第二表面，所述第一表面面向所述显示层，所述保护层还具有多个凸起结构以及位于所述第一表面的凹槽，所述凹槽具有底壁，所述底壁包括第一子表面以及设置在所述第一子表面相对两侧的第二子表面，所述第一子表面与所述第二表面之间的间距小于或等于所述第二子表面与所述第二表面之间的间距，多个所述凸起结构间隔设置在所述第二子表面，每一所述凸起结构中距离所述第二表面最远的点为所述凸起结构的顶点，所述凸起结构的所述顶点与所述第二表面之间的间距小于或等于所述第一表面和所述第二表面之间的间距，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的所述顶点与所述第二表面之间的间距相等或逐渐减小。
第二方面，本申请提供了一种可折叠电子设备，包括：
柔性屏，所述柔性屏包括显示层和保护层，所述保护层设置于所述显示层的一侧，用于保护所述显示层；所述保护层具有相对设置的第一表面和第二表面，所述第一表面面向所述显示层，所述保护层还具有多个凸起结构以及位于所述第一表面的凹槽，所述凹槽具有底壁，所述底壁包括第一子表面以及设置在所述第一子表面相对两侧的第二子表面，所述第一子表面与所述第二表面之间的间距小于或等于所述第二子表面与所述第二表面之间的间距，多个所述凸起结构间隔设置在所述第二子表面，每一所述凸起结构中距离所述第二表面最远的点为所述凸起结构的顶点，所述凸起结构的所述顶点与所述第二表面之间的间距小于或等于所述第一表面和所述第二表面之间的间距，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的所述顶点与所述第二表面之间的间距相等或逐渐减小；以及
可折叠中框，所述可折叠中框用于承载所述柔性屏，并用于驱动所述柔性屏进行折叠或展平，其中，所述柔性屏的所述保护层相较于所述显示层更远离所述可折叠中框。
附图说明
为了更清楚地说明本申请实施方式中的技术方案，下面将对本申请实施方式中所需要使用的附图进行说明。
图1为相关技术中柔性屏的分解示意图。
图2为相关技术中保护层的结构示意图。
图3为本申请一实施方式提供的柔性屏的结构示意图。
图4为图3在A-A方向上的截面示意图。
图5为本申请一实施方式提供的图4中保护层在虚线区域的放大图。
图6为本申请一实施方式提供的保护层的截面示意图。
图7为本申请另一实施方式提供的图4中保护层在虚线区域的放大图。
图8为本申请一实施方式提供的保护层的部分俯视图。
图9为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图10为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图11为本申请另一实施方式提供的保护层的部分俯视图。
图12为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图13为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图14为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图15为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图16为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图17为本申请又一实施方式提供的图4中保护层在虚线区域的放大图。
图18为本申请一实施方式提供的展开状态的可折叠电子设备的结构示意图。
图19为本申请一实施方式提供的可折叠电子设备的组成示意图。
标号说明：
保护层-100(100')，第一表面-101，第二表面-102，凸起结构-10，顶点-11，凹槽-20(20')，底壁-21，第一子表面-211，第二子表面-212，侧壁-22，第一部-31，第二部-32，第三部-33，显示层-201(201')，柔性屏-200(200')，可折叠中框-300，可折叠电子设备-400，RF电路-410，存储器-420，输入单元-430，显示单元-440，传感器-450，音频电路-460，扬声器-461，传声器-462，WiFi模块-470，处理器-480，电源-490。
具体实施方式
以下是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本申请的保护范围。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且 目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
本申请实施例提供了一种柔性屏，包括：显示层；以及保护层，所述保护层设置于所述显示层的一侧，用于保护所述显示层；所述保护层具有相对设置的第一表面和第二表面，所述第一表面面向所述显示层，所述保护层还具有多个凸起结构以及位于所述第一表面的凹槽，所述凹槽具有底壁，所述底壁包括第一子表面以及设置在所述第一子表面相对两侧的第二子表面，所述第一子表面与所述第二表面之间的间距小于或等于所述第二子表面与所述第二表面之间的间距，多个所述凸起结构间隔设置在所述第二子表面，每一所述凸起结构中距离所述第二表面最远的点为所述凸起结构的顶点，所述凸起结构的所述顶点与所述第二表面之间的间距小于或等于所述第一表面和所述第二表面之间的间距，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的所述顶点与所述第二表面之间的间距相等或逐渐减小。
其中，沿所述第二子表面至所述第一子表面的方向上，多个所述凸起结构在所述第二表面上的正投影面积和逐渐减小或逐渐增大。
其中，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的分布密度逐渐减小或逐渐增大。
其中，沿所述第二子表面至所述第一子表面的方向上，相邻所述凸起结构之间的间距逐渐减小或逐渐增大。
其中，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的宽度逐渐减小或逐渐增大。
其中，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的长度逐渐减小。
其中，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的高度逐渐减小、逐渐增大或不变。
其中，所述凹槽在所述第二表面的正投影与所述第二表面的面积比1:2.5至1:4。
其中，所述第一子表面在所述第二表面的正投影与所述第二子表面在所述第二表面的正投影的面积比为2至3。
其中，所述第一子表面为平面或弧面，所述弧面凸出朝向所述第二表面。
其中，所述第二子表面为平面或弧面；所述弧面凸出朝向所述第二表面，或所述弧面凸出背离所述第二表面。
其中，所述第一表面和所述第二表面之间的间距为100μm至500μm；所述第一子表面与所述第二表面之间的间距为30μm至60μm；在所述第二子表面至所述第一子表面的方向上，所述第一子表面的尺寸为20mm至40mm。
其中，相邻所述凸起结构之间的间距为10μm至50μm；在平行于所述第一表面且垂直于所述第二子表面至所述第一子表面的方向上，所述凸起结构的尺寸为10μm至1mm；所 述凸起结构的高度可以为40μm至500μm。
其中，所述凸起结构在所述第二子表面上呈阵列排布。
其中，所述保护层的材质包括玻璃。
其中，所述柔性屏还包括填充层，所述填充层设置在所述凹槽内且完全填充所述凹槽中的空隙。
其中，所述填充层还设置在所述第一表面与所述柔性屏之间。
其中，所述填充层的材质包括聚氨酯、丙烯酸酯和环氧树脂中的至少一种。
本申请实施例提供了一种可折叠电子设备，包括：柔性屏，所述柔性屏包括显示层和保护层，所述保护层设置于所述显示层的一侧，用于保护所述显示层；所述保护层具有相对设置的第一表面和第二表面，所述第一表面面向所述显示层，所述保护层还具有多个凸起结构以及位于所述第一表面的凹槽，所述凹槽具有底壁，所述底壁包括第一子表面以及设置在所述第一子表面相对两侧的第二子表面，所述第一子表面与所述第二表面之间的间距小于或等于所述第二子表面与所述第二表面之间的间距，多个所述凸起结构间隔设置在所述第二子表面，每一所述凸起结构中距离所述第二表面最远的点为所述凸起结构的顶点，所述凸起结构的所述顶点与所述第二表面之间的间距小于或等于所述第一表面和所述第二表面之间的间距，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的所述顶点与所述第二表面之间的间距相等或逐渐减小；以及可折叠中框，所述可折叠中框用于承载所述柔性屏，并用于驱动所述柔性屏进行折叠或展平，其中，所述柔性屏的所述保护层相较于所述显示层更远离所述可折叠中框。
其中，所述柔性屏能够绕折叠轴弯折，所述第一子表面与所述第二子表面的连接方向与所述保护层和所述显示层的层叠方向垂直，且与所述折叠轴的延伸方向垂直。
可折叠电子设备由于具有较大的显示面积并且便于携带，受到了广泛的关注。柔性屏是折叠可折叠电子设备不可或缺的显示器件，为了保证可折叠电子设备的长期使用，往往在柔性屏中增设保护层来提高使用寿命。为了不影响柔性屏的折叠、展开，保护层厚度较薄，起到的保护作用有限。请参阅图1，为相关技术中柔性屏的分解示意图，请参阅图2，为相关技术中保护层的结构示意图，其中柔性屏200'包括显示层201'以及设置在显示层201'一侧的保护层100'，保护层100'为不等厚结构，保护层100'的表面具有凹槽20'，从而使得保护层100'在凹槽20'处的厚度减薄，进而使得凹槽20'处的弯折性能提升，并且保护层100'在凹槽20'以外的区域厚度相对较厚，提高了抗冲击性能，如此使得保护层100'既能够满足柔性屏200'折叠、展开的要求，同时又可以起到很好的保护作用。然而，如图2所示，由于设置了凹槽20'使得保护层100'朝向柔性屏200'的一侧不是平整的表面，凹槽20'和凹槽20'以外区域在视觉上具有明显的差异，从而产生了明显的光影痕迹，影响柔性屏200'的使用。
因此，本申请提供了一种柔性屏200，其中保护层100在视觉上具有更加顺滑的光影，减弱光影痕迹的问题，从而避免了对柔性屏200使用的影响，并且保护层100能够满足柔性屏200折叠、展开的要求，又可以起到很好的保护作用，提高了柔性屏200使用性能。
请参阅图3至图5，图3为本申请一实施方式提供的柔性屏的结构示意图，图4为图3在A-A方向上的截面示意图以及图5为本申请一实施方式提供的图4中保护层在虚线区域的放大图，其中，柔性屏200包括显示层201以及保护层100，保护层100设置于显示层201的一侧，用于保护显示层201；保护层100具有相对设置的第一表面101和第二表面102，第一表面101面向显示层201，保护层100还具有多个凸起结构10以及位于第一表面101的凹槽20，凹槽20具有底壁21，底壁21包括第一子表面211以及设置在第一子表面211相对两侧的第二子表面212，第一子表面211与第二表面102之间的间距小于或等于第二子表面212与第二表面102之间的间距，多个凸起结构10间隔设置在第二子表面212，每一凸起结构10中距离第二表面102最远的点为凸起结构10的顶点11，凸起结构10的顶点11与第二表面102之间的间距小于或等于第一表面101和第二表面102之间的间距，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等或逐渐减小。本申请通过在凹槽20边缘部分设置多个凸起结构10，凸起结构10能够对光线进行折射和反射，从而使得保护层100中凹槽20和凹槽20以外区域之间在视觉上的连接更加顺滑，不会出现明显的台阶状痕迹等，使得不等厚的保护层100在视觉上与等厚的效果相同，同时凹槽20的设置保证了保护层100的弯折性能，以满足柔性屏200的使用，并且凹槽20以外的区域较厚，提高了保护层100的强度以及抗冲击性能，提升柔性屏200的使用寿命，有利于柔性屏200的使用。
在本申请中，如图3所示，柔性屏200能够绕折叠轴a弯折以实现折叠或展开，从而能够在可折叠电子设备400中使用。在本申请中，第一子表面211相对两侧设置有第二子表面212，第一子表面211与第二子表面212的连接方向与保护层100和显示层201的层叠方向垂直，且与折叠轴a的延伸方向垂直。为了便于描述，将保护层100和显示层201的层叠方向定义为第一方向，折叠轴a的延伸方向定义为第二方向。
请参阅图6，为本申请一实施方式提供的保护层的截面示意图，其中，保护层100包括依次相连的第一部31、第二部32和第三部33，第二部32沿保护层100的厚度方向上凹陷于第一部31且凹陷于第三部33，形成凹槽20，第一部31、第二部32和第三部33依次相连的方向与第一方向和第二方向垂直。可以理解的，在未设置凸起结构10时，由于第一部31、第二部32和第三部33的厚度不同，导致保护层100为不等厚结构，并且由于形成凹槽20，使得第一部31与第二部32以及第二部32与第三部33在视觉上具有明显的光线变化，例如具有明显的台阶状痕迹，从而使得第一部31与第二部32的连接、第二部32与第三部33的连接在视觉上有明显的分界线和光影痕迹，不利于保护层100在柔性屏200中的使用；本申请发明人通过在第二部32靠近第一部31的区域以及第二部32靠近第三部33的区域的表面设置多个凸起结构10，形成视觉上的过渡区，光影变化差异减小，从而使得保护层100在视觉上可以呈现较为一致的光影视感，有利于柔性屏200的使用。在本申请中，保护层100通过设置凹槽20，从而使得第二部32在第一方向上的厚度小于第一部31和第三部33的厚度，从而提高了第二部32的弯折性能，提高使用寿命和可靠性，有利于保护层100在柔性屏200中使用，能够满足柔性屏200折叠、展开的使用要求，并且不 会过多增加柔性屏200的重量；第一部31和第三部33的厚度大于第二部32的厚度，因此第一部31和第三部33的强度以及抗冲击性能更好，从而提高了保护层100的使用寿命和可靠性，进而提升了柔性屏200的使用性能。
在本申请中，凹槽20具有底壁21，底壁21包括第一子表面211以及设置在第一子表面211相对两侧的第二子表面212，多个凸起结构10间隔设置在第二子表面212，从而使得位于第一部31的第一表面101至第一子表面211之间具有多个凸起结构10形成的过渡区以及位于第三部33的第一表面101至第一子表面211之间具有多个凸起结构10形成的过渡区，通过光线在凸起结构10上的反射、折射等，使得位于第一部31的第一表面101至第一子表面211以及位于第三部33的第一表面101至第一子表面211的光影变化差异减弱，使得保护层100呈现较为一致的光影视觉效果，改善光影痕迹。凹槽20的深度为沿第一方向上底壁21与第一表面101之间的最大距离，凹槽20的宽度为沿垂直于第一方向且垂直于第二方向的方向上的尺寸，凹槽20的长度为沿第二方向上的尺寸。在本申请一实施方式中，凹槽20包括底壁21以及侧壁22。在本申请一实施例中，侧壁22可以大致垂直第二表面102。可以理解的，侧壁22与第二表面102之间的锐角夹角为85°至90°。
请参阅图7，为本申请另一实施方式提供的图4中保护层在虚线区域的放大图，其中第一表面101和第二表面102之间的间距为D0，第一子表面211与第二表面102之间的间距为D1，第二子表面212与第二表面102之间的间距为D2，凸起结构10的顶点11与第二表面102之间的间距为D3。在本申请中，第一子表面211与第二表面102之间的间距D1小于或等于第二子表面212与第二表面102之间的间距D2，从而保证了第三部33边缘区域的厚度大于或等于第三部33中间区域的厚度，避免第三部33中间区域厚度大于边缘区域厚度造成第一子表面211凸出于第二子表面212而无法避免光影痕迹的问题；凸起结构10的顶点11与第二表面102之间的间距D3小于或等于第一表面101和第二表面102之间的间距D0，从而避免了凸起结构10凸出于第一表面101而带来的光影痕迹加重的问题。
由于第一子表面211的相对两侧均具有第二子表面212，如图5所示，第一子表面211的左右两侧均有第二子表面212，本申请中沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等或逐渐减小，是指沿位于左侧的第二子表面212至第一子表面211的方向上(即图5中从左至右的水平方向上)，左侧的第二子表面212上的凸起结构10的顶点11与第二表面102之间的间距D3相等或逐渐减小，以及沿位于右侧的第二子表面212至第一子表面211的方向上(即图5中从右至左的水平方向上)，右侧的第二子表面212上的凸起结构10的顶点11与第二表面102之间的间距D3相等或逐渐减小。在本申请中，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等或逐渐减小，从而使得第一表面101与第一子表面211之间形成缓慢的光影过渡，从而可以减弱保护层100的光影痕迹；同时，设置弧面连接第一表面101和第一子表面211时，弧面需要非常平缓才能达到平缓过渡，这样就需要增加弧面在第一表面101至第一子表面211方向上的尺寸，从而使得保护层100 和凹槽20的尺寸设计受限于弧面的尺寸，不利于不同尺寸规格保护层100的开发利用，因此，本申请通过设置间隔排布的凸起结构10，充分对光线进行反射、折射改善光影痕迹，并且凸起结构10可以匹配不同规格尺寸的保护层100和凹槽20，有利于保护层100的使用。
在本申请一实施例中，如图5所示，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等。在本申请另一实施例中，如图7所示，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3减小。如前文所述的，第一子表面211的左右两侧均有第二子表面212，两个第二子表面212上凸起结构10的顶点11与第二表面102之间的间距D3变化可以相同，也可以不同。在一实施例中，如图5和图7所示，沿第二子表面212至第一子表面211的方向上，两个第二子表面212上凸起结构10的顶点11与第二表面102之间的间距D3变化可以相同。在另一实施例，沿第二子表面212至第一子表面211的方向上，第一子表面211一侧的第二子表面212上凸起结构10的顶点11与第二表面102之间的间距D3相等，第一子表面211相对一侧的第二子表面212上凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小。
在本申请一实施方式中，沿第二子表面212至第一子表面211的方向上，多个凸起结构10在第二表面102上的正投影面积和逐渐减小或逐渐增大。可以理解的，沿第二子表面212至第一子表面211的方向上，多个凸起结构10在第二表面102上的正投影面积和，是指沿第二子表面212至第一子表面211的方向，在相同的范围内多个凸起结构10在第二表面102上的正投影面积和。在第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐变化，能够进一步加强过渡效果，使过渡更加平缓，从而进一步减弱光影痕迹。在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐减小，且凸起结构10的顶点11与第二表面102之间的间距D3相等。在本申请另一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐增大，且凸起结构10的顶点11与第二表面102之间的间距D3相等。在本申请又一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐减小，且凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小。在本申请又一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐增大，且凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小。
在本申请一实施例中，保护层100满足以下条件中的至少一个：沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐减小或逐渐增大；沿第二子表面212至第一子表面211的方向上，相邻凸起结构10之间的间距逐渐减小或逐渐增大；沿第二子表面212至第一子表面211的方向上，凸起结构10的宽度逐渐减小或逐渐增大；沿第二子表面212至第一子表面211的方向上，凸起结构10的长度逐渐减小。如此，能够实现沿第二子表面212至第一子表面211的方向上，多个凸起结构10在第二表面102上的正投影面 积和逐渐减小或逐渐增大。其中，凸起结构10的分布密度为单位面积内凸起结构10的数量；相邻凸起结构10之间的间距为沿第二子表面212至第一子表面211的方向上相邻凸起结构10之间的距离；凸起结构10的宽度为在垂直与第一方向且垂直与第二方向的方向上的尺寸，也可以理解为在平行于第一表面101且垂直于第二子表面212至第一子表面211的方向上的尺寸；凸起结构10的长度为在第二方向上的尺寸，即在平行于第一表面101且垂直于第二子表面212至第一子表面211的方向上的尺寸。通过设置凸起结构10的分布密度、相邻凸起结构10之间的间距、凸起结构10的宽度和凸起结构10的长度中的至少一个发生变化，从而使多个凸起结构10在第二表面102上的正投影面积和逐渐变化。在本申请中，逐渐增大可以为梯度增大，也可以为线性增大，还可以为不规则增大；逐渐减小可以为梯度减小，也可以为线性减小，还可以为不规则减小。
在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐减小，且凸起结构10的顶点11与第二表面102之间的间距D3相等；此时，沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐减小，或者相邻凸起结构10之间的间距逐渐增大，或者凸起结构10的宽度逐渐减小，或者凸起结构10的长度逐渐减小，或者上述变化同时发生。在本申请另一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐减小，且凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小；此时，沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐减小，或者相邻凸起结构10之间的间距逐渐增大，或者凸起结构10的宽度逐渐减小，或者凸起结构10的长度逐渐减小，或者上述变化同时发生。
在一实施例中，请参阅图8，为本申请一实施方式提供的保护层的部分俯视图，其中沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐减小，从而使得凸起结构10在第二表面102上的正投影面积逐渐减小，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3可以相等，也可以逐渐变化；多个凸起结构10的尺寸可以相同，也可以不同；相邻凸起结构10之间的间距可以相同，也可以不同。在另一实施例中，如图5所示，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等且相邻凸起结构10之间的间距逐渐增大，从而使得凸起结构10在第二表面102上的正投影面积逐渐减小，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；多个凸起结构10的尺寸可以相同，也可以不同。在又一实施例中，如图7所示，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小且相邻凸起结构10之间的间距逐渐增大，从而使得凸起结构10在第二表面102上的正投影面积逐渐减小，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；多个凸起结构10的尺寸可以相同，也可以不同。请参阅图9，为本申请又一实施方式提供的图4中保 护层在虚线区域的放大图，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等且凸起结构10的宽度逐渐减小，从而使得凸起结构10在第二表面102上的正投影面积逐渐减小，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；相邻凸起结构10之间的间距可以相同，也可以不同；多个凸起结构10的长度可以相同，也可以不同。请参阅图10，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小且凸起结构10的宽度逐渐减小，从而使得凸起结构10在第二表面102上的正投影面积逐渐减小，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；相邻凸起结构10之间的间距可以相同，也可以不同；多个凸起结构10的长度可以相同，也可以不同。请参阅图11，为本申请另一实施方式提供的保护层的部分俯视图，沿第二子表面212至第一子表面211的方向上，凸起结构10的长度逐渐减小，从而使得凸起结构10在第二表面102上的正投影面积逐渐减小，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3可以相等，也可以逐渐变化；凸起结构10的分布密度可以不变，也可以变化；相邻凸起结构10之间的间距可以相同，也可以不同；多个凸起结构10的宽度可以相同，也可以不同。
在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐增大，且凸起结构10的顶点11与第二表面102之间的间距D3相等；此时，沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐增大，或者相邻凸起结构10之间的间距逐渐减小，或者凸起结构10的宽度逐渐增大，或者上述变化同时发生。在本申请又一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10在第二表面102上的正投影面积逐渐增大，且凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小；此时，沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐增大，或者相邻凸起结构10之间的间距逐渐减小，或者凸起结构10的宽度逐渐增大，或者上述变化同时发生。
在一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度逐渐增大，从而使得凸起结构10在第二表面102上的正投影面积逐渐增大，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3可以相等，也可以逐渐变化；多个凸起结构10的尺寸可以相同，也可以不同；相邻凸起结构10之间的间距可以相同，也可以不同。在另一实施例中，请参阅图12，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等且相邻凸起结构10之间的间距逐渐减小，从而使得凸起结构10在第二表面102上的正投影面积逐渐增大，进一步改善保护层100的光影痕迹。此时沿第二子 表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；多个凸起结构10的尺寸可以相同，也可以不同。在又一实施例中，请参阅图13，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小且相邻凸起结构10之间的间距逐渐减小，从而使得凸起结构10在第二表面102上的正投影面积逐渐增大，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；多个凸起结构10的尺寸可以相同，也可以不同。请参阅图14，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3相等且凸起结构10的宽度逐渐增大，从而使得凸起结构10在第二表面102上的正投影面积逐渐增大，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；相邻凸起结构10之间的间距可以相同，也可以不同；多个凸起结构10的长度可以相同，也可以不同。在又一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距D3逐渐减小且凸起结构10的宽度逐渐增大，从而使得凸起结构10在第二表面102上的正投影面积逐渐增大，进一步改善保护层100的光影痕迹。此时沿第二子表面212至第一子表面211的方向上，凸起结构10的分布密度可以不变，也可以变化；相邻凸起结构10之间的间距可以相同，也可以不同；多个凸起结构10的长度可以相同，也可以不同。
在本申请一实施方式中，第一子表面211可以为平面或弧面，其中弧面凸出朝向第二表面102。在本申请一实施例中，如图5所示，第一子表面211为平面。请参阅图15，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，其中第一子表面211为弧面，弧面凸出朝向第二表面102。通过设置弧面的第一子表面211，有利于进一步改善保护层100的光影痕迹，提高保护层100的视觉一致性。在本申请一实施方式中，第二子表面212可以为平面或弧面，其中弧面凸出朝向第二表面102或弧面凸出背离第二表面102。在本申请一实施例中，如图5所示，第二子表面212为平面。在本申请另一实施例中，如图15所示，其中第二子表面212为弧面，弧面凸出朝向第二表面102。在本申请又一实施例中，通过设置第二子表面212为弧面，弧面凸出背离第二表面102。通过设置弧面的第二子表面212，有利于进一步改善保护层100的光影痕迹，提高保护层100的视觉一致性。在一实施例中，第一子表面211为平面，第二子表面212为平面。在另一实施例中，第一子表面211为平面，第二子表面212为弧面。在又一实施例中，第一子表面211为弧面，第二子表面212为平面。在又一实施例中，第一子表面211为弧面且第一子表面211凸出朝向第二表面102，第二子表面212为弧面且第二子表面212凸出背离第二表面102。在又一实施例中，第一子表面211为弧面且第一子表面211凸出朝向第二表面102，第二子表面212为弧面且第二子表面212凸出朝向第二表面102。如此能够形成更加平缓的视觉过渡，进一步改善光影痕迹。在本申请一实施方式中，第二子表面212为平面时，第二子表面212 与第二表面102平行或具有夹角。在本申请一实施例中，如图5所示，第二子表面212为平面且与第二表面102平行。请参阅图16，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，其中第二子表面212为平面且与第二表面102具有夹角。具体的，夹角可以小于或等于20°、30°、40°、45°、50°、60°或70°等。
由于第二子表面212可以为平面或弧面，因此，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等时，凸起结构10的高度可以相等，也可以发生变化；沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距逐渐减小时，凸起结构10的高度可以相等，也可以发生变化。其中，凸起结构10的高度为在第一方向上的尺寸。
在本申请一实施方式中，如图5所示，第二子表面212为平面且与第二表面102平行。当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度也相等；当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距逐渐减小时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度也逐渐减小。请参阅图16，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，其中第二子表面212为平面且与第二表面102具有夹角。当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度逐渐增大；当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距逐渐减小时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度可以逐渐减小也可以不变。在本申请另一实施方式中，如图15所示，第二子表面212为弧面且凸出朝向第二表面102。当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度逐渐增大；当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距逐渐减小时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度可以逐渐减小也可以不变。在本申请又一实施方式中，第二子表面212为弧面且凸出背离第二表面102。当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度逐渐增大；当沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距逐渐减小时，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度可以逐渐减小也可以不变还可以逐渐增大。
在本申请一实施方式中，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度逐渐减小、逐渐增大或不变。在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距小于或等于第一表面101和第二表面102之间的间距；沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等或逐渐减小；沿第二子表面212至第一子表面 211的方向上，凸起结构10的高度不变。进一步的，沿第二子表面212至第一子表面211的方向上，多个凸起结构10在第二表面102上的正投影面积和不变。即凸起结构10的分布密度、相邻凸起结构10之间的间距、凸起结构10的宽度和长度均不变。请参阅图17，为本申请又一实施方式提供的图4中保护层在虚线区域的放大图，其中沿第二子表面212至第一子表面211的方向上，凸起结构10的高度不变且多个凸起结构10在第二表面102上的正投影面积和不变。在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距小于或等于第一表面101和第二表面102之间的间距；沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等或逐渐减小；沿第二子表面212至第一子表面211的方向上，凸起结构10的高度逐渐减小。此时，沿第二子表面212至第一子表面211的方向上，多个凸起结构10在第二表面102上的正投影面积和不变、逐渐增大或逐渐减小。在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距小于或等于第一表面101和第二表面102之间的间距；沿第二子表面212至第一子表面211的方向上，凸起结构10的顶点11与第二表面102之间的间距相等或逐渐减小；沿第二子表面212至第一子表面211的方向上，凸起结构10的高度逐渐增大。此时，沿第二子表面212至第一子表面211的方向上，多个凸起结构10在第二表面102上的正投影面积和不变、逐渐增大或逐渐减小。
在本申请一实施方式中，凹槽20在第二表面102的正投影与第二表面102的面积比1:2.5至1:4。如此能够进一步保证厚度较厚区域的占比，提高保护层100的强度和抗冲击性能。具体的，凹槽20在第二表面102的正投影与第二表面102的面积比可以但不限于为1:2.5、1:2.8、1:3、1:3.4、1:3.5、1:3.7或1:4等。在本申请一实施例中，凹槽20在第二表面102的正投影与第二表面102的面积比1:2.5至1:3。在本申请一实施例中，凹槽20在第二表面102的正投影与第二表面102的面积比1:3至1:4。在一实施例中，凹槽20的长度与第二表面102的长度相等，凹槽20在第二表面102的正投影与第二表面102的面积比即为凹槽20的宽度与第二表面102的宽度之比。其中，第二表面102的长度为沿第二方向上的尺寸。
在本申请一实施方式中，第一子表面211在第二表面102的正投影与第二子表面212在第二表面102的正投影的面积比为2至3。如此有利于设置足够区域的凸起结构10来改善光线，提升凸起结构10带来的光影过渡的效果，从而进一步改善光影痕迹，提高保护层100在视觉上的一致性。其中，由于第一子表面211的相对两侧均设置有第二子表面212，第二子表面212在第二表面102的正投影的面积包括了第一子表面211的相对两侧的两个第二子表面212在第二表面102的正投影的面积。具体的，第一子表面211在第二表面102的正投影与第二子表面212在第二表面102的正投影的面积比为可以但不限于为2、2.2、2.4、2.5、2.6、2.8或3等。在本申请一实施例中，第一子表面211在第二表面102的正投影与第二子表面212在第二表面102的正投影的面积比为2至2.5。在本申请另一实施例中，第一子表面211在第二表面102的正投影与第二子表面212在第二表面102的正投影的面 积比为2.5至3。在一实施例中，第一子表面211的长度与第二子表面212的长度相等，第一子表面211在第二表面102的正投影与第二子表面212在第二表面102的正投影的面积比即为第一子表面211的宽度与第二子表面212的宽度之比。其中，第一子表面211的长度为沿第二方向上的尺寸，第二子表面212的长度为沿第二方向上的尺寸。
在本申请一实施方式中，第一表面101和第二表面102之间的间距D0为100μm至500μm，如此既能够提高保护层100的强度和抗冲击性，同时又不会过多增加柔性屏200的厚度和重量。具体的，第一表面101和第二表面102之间的间距D0可以但不限于为100μm、150μm、200μm、280μm、300μm、360μm、400μm或500μm等。在本申请一实施例中，第一表面101和第二表面102之间的间距D0可以为100μm至250μm。在本申请另一实施例中，第一表面101和第二表面102之间的间距D0可以为250μm至500μm。在本申请一实施方式中，第一表面101和第二表面102为平面。在一实施例中，第一表面101和第二表面102为平面且垂直于第一方向。
在本申请一实施方式中，第一子表面211和第二表面102之间的间距D1为30μm至60μm，如此既保证保护层100的弯折性能，同时又可以降低保护层100的重量，从而有利于降低柔性屏200的重量。具体的，第一子表面211和第二表面102之间的间距D1可以但不限于为30μm、33μm、35μm、40μm、45μm、47μm、50μm、55μm或60μm等。在本申请一实施例中，第一子表面211和第二表面102之间的间距D1可以为30μm至45μm。在本申请另一实施例中，第一子表面211和第二表面102之间的间距D1可以为40μm至55μm。在本申请又一实施例中，第一子表面211和第二表面102之间的间距D1可以为47μm至60μm。
在本申请中，第一子表面211的宽度为在第二子表面212至第一子表面211的方向上第一子表面211的尺寸。在本申请一实施方式中，第一子表面211的宽度为20mm至40mm，从而有利于提高保护层100的弯折性能。具体的，第一子表面211的宽度可以但不限于为20μm、24μm、25μm、27μm、30μm、35μm、38μm、39μm或40μm等。在本申请一实施例中，第一子表面211的宽度为25mm至35mm。在本申请另一实施例中，第一子表面211的宽度为25mm至38mm。
在本申请中，凸起结构10的高度、长度和宽度根据需要进行设定，多个凸起结构10的高度、长度和宽度可以相同也可以不同。在本申请中，凸起结构10可以但不限于为圆柱体、长方体、正方体、圆锥体等。在本申请中，凸起结构10可以阵列排布在第二子表面212，即在第二子表面212呈规律排布，凸起结构10也可以在第二子表面212呈不规律状排布。在本申请中，凸起结构10的顶点11与第二表面102之间的间距小于或等于第一表面101和第二表面102之间的间距；如图5所示，凸起结构10的顶点11与第二表面102之间的间距等于第一表面101和第二表面102之间的间距；如图16所示，凸起结构10的顶点11与第二表面102之间的间距小于第一表面101和第二表面102之间的间距。
在本申请一实施方式中，凸起结构10的高度可以为40μm至500μm。在一实施例中，凸起结构10的高度可以为60μm至450μm。在另一实施例中，凸起结构10的高度可以为 150μm至350μm。在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度从300μm至500μm逐渐降低至40μm至300μm。在一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度从350μm至450μm逐渐降低至50μm至200μm。
在本申请一实施方式中，相邻凸起结构10之间的间距为10μm至50μm。具体的，相邻凸起结构10之间的间距可以但不限于为10μm、20μm、25μm、30μm、40μm或50μm等。在一实施例中，相邻凸起结构10之间的间距为10μm至25μm。在另一实施例中，相邻凸起结构10之间的间距为25μm至50μm。
在本申请一实施方式中，凸起结构10的长度为10μm至1mm。具体的，凸起结构10的长度可以但不限于为10μm、150μm、200μm、350μm、400μm、500μm、600μm、700μm、800μm或900μm等。在一实施例中，凸起结构10的长度为10μm至200μm。在另一实施例中，凸起结构10的长度为100μm至500μm。在又一实施例中，凸起结构10的长度为300μm至700μm。在本申请一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的长度从10μm至500μm逐渐降低至500μm至1mm。在一实施例中，沿第二子表面212至第一子表面211的方向上，凸起结构10的高度从100μm至350μm逐渐降低至500μm至700μm。
在本申请中，保护层100的材质可以但不限于为塑胶、玻璃、蓝宝石等，以满足强度和弯折性能。在一实施例中，保护层100的可见光透过率大于85％，从而避免对显示层201显示效果的遮挡。在本申请一实施方式中，保护层100的材质包括玻璃。本申请中通过设置凸起结构10改善保护层100的光影痕迹，同时也有利于强化的进行，使得强化时凸起结构10有助于进一步缩小凹槽20区域与凹槽20以外区域之间的膨胀量差异，避免膨胀量差异过大引起的扭曲问题，提高强化玻璃的制备良率。在本申请中，可以通过刻蚀得到保护层100，也可以通过模具一体成型的方式得到保护层100。
在本申请中，显示层201用于使柔性屏200发光并实现显示功能；显示层201可以为但不限于为有机显示层201，例如有源矩阵有机发光二极体等。
在本申请一实施方式中，柔性屏200还包括填充层，填充层设置在凹槽20内且完全填充凹槽20中的空隙。也就是说，填充层完全填充凸起结构10之间的空隙。如此，使得凸起结构10的设置不会影响显示层201的显示效果。在本申请一实施例中，填充层还可以设置在第一表面101与柔性屏200之间，此时填充层还可以起到缓冲作用，进一步提高柔性屏200的使用寿命。具体的，填充层的材质可以但不限于包括聚氨酯、丙烯酸酯、环氧树脂中的至少一种。
本申请还提供了一种可折叠电子设备400，包括上述任一实施方式中的柔性屏200。上述柔性屏200的使用寿命和使用性能优异，从而提高了可折叠电子设备400的使用寿命，同时也提升可折叠电子设备400的使用性能，提高产品竞争力。
请参阅图18，为本申请一实施方式提供的展开状态的可折叠电子设备的结构示意图，其中可折叠电子设备400包括柔性屏200和可折叠中框300，可折叠中框300用于承载柔 性屏200，并用于驱动柔性屏200进行折叠或展平，其中，柔性屏200的保护层100相较于显示层201更远离可折叠中框300。具体的，柔性屏200可以通过背胶粘贴于可折叠中框300。本申请实施例的可折叠电子设备400可以为但不限于为手机、平板电脑、电子阅读器、笔记本电脑等显示屏尺寸可变的便携式可折叠设备。可以理解地，本实施方式中的可折叠电子设备400仅仅为柔性屏200所应用的可折叠电子设备400的一种形态，不应当理解为对本申请提供的可折叠电子设备400的限定，也不应当理解为对本申请各个实施方式提供的柔性屏200的限定。
请参阅图19，为本申请一实施方式提供的可折叠电子设备的组成示意图，可折叠电子设备400的结构可以包括RF电路410、存储器420、输入单元430、显示单元440、传感器450、音频电路460、WiFi模块470、处理器480以及电源490等。其中，RF电路410、存储器420、输入单元430、显示单元440、传感器450、音频电路460、WiFi模块470分别与处理器480连接；电源490用于为整个可折叠电子设备400提供电能。具体而言，RF电路410用于接发信号；存储器420用于存储数据指令信息；输入单元430用于输入信息，具体可以包括触控面板以及操作按键等其他输入设备；显示单元440可以包括显示屏等；传感器450包括红外传感器、激光传感器等，用于检测用户接近信号、距离信号等；扬声器461以及传声器462通过音频电路460与处理器480连接，用于接发声音信号；WiFi模块470则用于接收和发射WiFi信号；处理器480用于处理可折叠电子设备400的数据信息。
以上对本申请实施方式所提供的内容进行了详细介绍，本文对本申请的原理及实施方式进行了阐述与说明，以上说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种柔性屏，其特征在于，包括：
    显示层；以及
    保护层，所述保护层设置于所述显示层的一侧，用于保护所述显示层；所述保护层具有相对设置的第一表面和第二表面，所述第一表面面向所述显示层，所述保护层还具有多个凸起结构以及位于所述第一表面的凹槽，所述凹槽具有底壁，所述底壁包括第一子表面以及设置在所述第一子表面相对两侧的第二子表面，所述第一子表面与所述第二表面之间的间距小于或等于所述第二子表面与所述第二表面之间的间距，多个所述凸起结构间隔设置在所述第二子表面，每一所述凸起结构中距离所述第二表面最远的点为所述凸起结构的顶点，所述凸起结构的所述顶点与所述第二表面之间的间距小于或等于所述第一表面和所述第二表面之间的间距，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的所述顶点与所述第二表面之间的间距相等或逐渐减小。
  2. 如权利要求1所述的柔性屏，其特征在于，沿所述第二子表面至所述第一子表面的方向上，多个所述凸起结构在所述第二表面上的正投影面积和逐渐减小或逐渐增大。
  3. 如权利要求2所述的柔性屏，其特征在于，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的分布密度逐渐减小或逐渐增大。
  4. 如权利要求2所述的柔性屏，其特征在于，沿所述第二子表面至所述第一子表面的方向上，相邻所述凸起结构之间的间距逐渐减小或逐渐增大。
  5. 如权利要求2所述的柔性屏，其特征在于，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的宽度逐渐减小或逐渐增大。
  6. 如权利要求2所述的柔性屏，其特征在于，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的长度逐渐减小。
  7. 如权利要求1所述的柔性屏，其特征在于，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的高度逐渐减小、逐渐增大或不变。
  8. 如权利要求1所述的柔性屏，其特征在于，所述凹槽在所述第二表面的正投影与所述第二表面的面积比1:2.5至1:4。
  9. 如权利要求1所述的柔性屏，其特征在于，所述第一子表面在所述第二表面的正投影与所述第二子表面在所述第二表面的正投影的面积比为2至3。
  10. 如权利要求1所述的柔性屏，其特征在于，所述第一子表面为平面或弧面，所述弧面凸出朝向所述第二表面。
  11. 如权利要求1所述的柔性屏，其特征在于，所述第二子表面为平面或弧面；
    所述弧面凸出朝向所述第二表面，或所述弧面凸出背离所述第二表面。
  12. 如权利要求1所述的柔性屏，其特征在于，所述第一表面和所述第二表面之间的间距为100μm至500μm；
    所述第一子表面与所述第二表面之间的间距为30μm至60μm；
    在所述第二子表面至所述第一子表面的方向上，所述第一子表面的尺寸为20mm至40mm。
  13. 如权利要求1所述的柔性屏，其特征在于，相邻所述凸起结构之间的间距为10μm至50μm；
    在平行于所述第一表面且垂直于所述第二子表面至所述第一子表面的方向上，所述凸起结构的尺寸为10μm至1mm；
    所述凸起结构的高度可以为40μm至500μm。
  14. 如权利要求1所述的柔性屏，其特征在于，所述凸起结构在所述第二子表面上呈阵列排布。
  15. 如权利要求1所述的柔性屏，其特征在于，所述保护层的材质包括玻璃。
  16. 如权利要求1所述的柔性屏，其特征在于，所述柔性屏还包括填充层，所述填充层设置在所述凹槽内且完全填充所述凹槽中的空隙。
  17. 如权利要求16所述的柔性屏，其特征在于，所述填充层还设置在所述第一表面与所述柔性屏之间。
  18. 如权利要求16所述的柔性屏，其特征在于，所述填充层的材质包括聚氨酯、丙烯酸酯和环氧树脂中的至少一种。
  19. 一种可折叠电子设备，其特征在于，包括：
    柔性屏，所述柔性屏包括显示层和保护层，所述保护层设置于所述显示层的一侧，用于保护所述显示层；所述保护层具有相对设置的第一表面和第二表面，所述第一表面面向所述显示层，所述保护层还具有多个凸起结构以及位于所述第一表面的凹槽，所述凹槽具有底壁，所述底壁包括第一子表面以及设置在所述第一子表面相对两侧的第二子表面，所述第一子表面与所述第二表面之间的间距小于或等于所述第二子表面与所述第二表面之间的间距，多个所述凸起结构间隔设置在所述第二子表面，每一所述凸起结构中距离所述第二表面最远的点为所述凸起结构的顶点，所述凸起结构的所述顶点与所述第二表面之间的间距小于或等于所述第一表面和所述第二表面之间的间距，沿所述第二子表面至所述第一子表面的方向上，所述凸起结构的所述顶点与所述第二表面之间的间距相等或逐渐减小；以及
    可折叠中框，所述可折叠中框用于承载所述柔性屏，并用于驱动所述柔性屏进行折叠或展平，其中，所述柔性屏的所述保护层相较于所述显示层更远离所述可折叠中框。
  20. 如权利要求19所述的可折叠电子设备，其特征在于，所述柔性屏能够绕折叠轴弯折，所述第一子表面与所述第二子表面的连接方向与所述保护层和所述显示层的层叠方向垂直，且与所述折叠轴的延伸方向垂直。
PCT/CN2023/120323 2022-12-20 2023-09-21 柔性屏和可折叠电子设备 WO2024131173A1 (zh)

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