CN115116343B

CN115116343B - Flexible screen assembly and electronic equipment

Info

Publication number: CN115116343B
Application number: CN202210908167.2A
Authority: CN
Inventors: 汤立文; 叶宗和; 董宇坤; 尹志安; 莫春鉴; 马晓鑫
Original assignee: Zhuhai Huacui Technology Co ltd
Current assignee: Zhuhai Huacui Technology Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-04-25
Anticipated expiration: 2042-07-29
Also published as: CN115116343A

Abstract

The invention discloses a flexible screen assembly and electronic equipment, wherein the flexible screen assembly comprises a flexible display screen and a winding and unwinding assembly, the winding and unwinding assembly comprises a scroll, the scroll is connected with one end of the flexible display screen, the scroll can controllably rotate to wind the flexible display screen on the scroll, and the flexible display screen wound on the scroll is released; wherein, flexible display screen is equipped with a plurality of strengthening ribs, and the axial extension of strengthening rib along the spool, and a plurality of strengthening ribs are along flexible display screen's receipts unreel direction interval setting. The flexible screen component has the advantages of large display area, small occupied space during storage, good display effect, high stability and long service life.

Description

Flexible screen assembly and electronic equipment

Technical Field

The invention relates to the field of electronic equipment, in particular to a flexible screen assembly and electronic equipment.

Background

In order to simultaneously consider the effective use area and the storage occupation space of the display device, the latest screen technology currently sets the screen to be in a foldable state, but the screen folding technology has the following disadvantages:

1. after repeated folding, the screen is easy to fold, so that the display effect of the screen is poor;

2. The storage occupation space which can be reduced by the folding screen is still limited, and the ratio of the display area of the display equipment to the storage space occupied by the display equipment cannot be improved to the greatest extent.

An exemplary technology proposes a flexible screen assembly that includes a reel and a flexible display screen that can be wound around the reel to save the footprint of the display screen. However, in the exemplary technology, after the flexible display screen is wound around the reel, both side edges of the flexible display screen may warp when the flexible display screen is unwound, so that the display effect of the flexible display screen is affected.

Disclosure of Invention

The invention mainly aims to provide a flexible screen assembly, and aims to solve the problem that two side edges of a flexible display screen can warp when the flexible display screen is unfolded after being rolled.

In order to achieve the above object, the flexible screen assembly provided by the invention comprises a flexible display screen and a winding and unwinding assembly, wherein,

the winding and unwinding assembly comprises a reel, wherein the reel is connected with one end of the flexible display screen, the reel can controllably rotate to wind the flexible display screen on the reel, and the flexible display screen wound on the reel is released; wherein, the liquid crystal display device comprises a liquid crystal display device,

the flexible display screen is provided with a plurality of reinforcing ribs, the reinforcing ribs extend along the axial direction of the scroll, and the reinforcing ribs are arranged at intervals along the winding and unwinding directions of the flexible display screen.

In an embodiment, the deformation force of the flexible display screen is set as P ₁ The orthopedic force of the reinforcing rib is P ₂ The following steps are:

wherein E is ₂ >E ₁ ，P ₂ >P ₁ ；

Wherein f is a set deflection deformation amount, E ₁ An initial modulus of elasticity for the flexible display; i ₁ The moment of inertia of the flexible display screen; l (L) ₁ The length of the flexible display screen along the axial direction of the scroll is set; e (E) ₂ The elastic modulus of the reinforcing rib; i ₂ The moment of inertia of the reinforcing rib; l (L) ₂ Is the length of the reinforcing rib along the axial direction of the reel.

In one embodiment, the flexible display screen has a plurality of light beads; the distance between adjacent lamp beads in the winding and unwinding directions of the flexible display screen is w, and the minimum bending radius of the flexible display screen is R; let the width of the stiffener be b, then there are:

in one embodiment, the flexible display screen comprises a flexible base layer, wherein the thickness of the flexible base layer is t _F Let the thickness of the stiffener be h, then there are:

h≥t _F 。

in one embodiment, the flexible display screen has a plurality of light beads;

the distance between adjacent lamp beads in the winding and unwinding directions of the flexible display screen is w; setting the minimum bending radius of the flexible display screen as R; let adjacent the interval of strengthening rib be g, then there is:

in one embodiment, 0.2 mm.ltoreq.w.ltoreq.30 cm; and/or R is more than or equal to 0.4mm and less than or equal to 70cm.

In one embodiment, the reinforcing ribs are arranged on the surface of the flexible display screen or embedded in the flexible display screen, wherein,

when the reinforcing ribs are arranged on the light emitting side of the lamp beads, the reinforcing ribs and the lamp beads are sequentially staggered in the winding and unwinding directions of the flexible display screen;

when the reinforcing ribs are arranged on the non-luminous side of the lamp beads, the reinforcing ribs and the lamp beads are sequentially staggered in the winding and unwinding direction of the flexible display screen, or the projection of the reinforcing ribs on the surface of the flexible display screen is in the projection of the lamp beads.

In an embodiment, the flexible display screen further comprises a background layer, wherein the background layer is arranged on the non-light-emitting side of the lamp beads, and the background layer is used for providing background color.

In an embodiment, the flexible screen assembly further includes a driving module, the driving module includes a display driving IC, the display driving IC is electrically connected with the flexible display screen, and the driving module and the winding and unwinding assembly are disposed at the same end of the flexible display screen, or the driving module and the winding and unwinding assembly are separately disposed at two ends of the flexible display screen.

The invention also provides electronic equipment, which comprises a shell and the flexible screen assembly, wherein the flexible screen assembly is arranged on the shell.

According to the flexible screen assembly, one end of the flexible display screen is connected to the scroll, so that the flexible display screen can be rolled or unfolded through rotation of the scroll, and therefore occupied space of the screen during storage and carrying can be reduced when a larger display surface is obtained, and display area and occupied space of display equipment are simultaneously considered. Meanwhile, the winding mode does not cause the screen to generate crease, and is beneficial to ensuring the long-term display effect of the flexible display screen. In addition, a plurality of reinforcing ribs extending along the axial direction of the scroll are arranged on the flexible display screen, and the plurality of reinforcing ribs are arranged at intervals in the winding and unwinding directions of the flexible display screen. Therefore, the coercive force is provided for the flexible display screen through the reinforcing ribs under the condition that the bending of the flexible display screen is not affected, the phenomenon that the flexible display screen is raised in a bowl is avoided, the flatness of the flexible display screen under long-term use is guaranteed, and the display effect of the flexible display screen after repeated winding is guaranteed. Therefore, compared with the traditional folding display screen, the flexible screen assembly has the advantages of large display area, small occupied space during storage, good display effect, high stability and long service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a flexible screen assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of an embodiment of the flexible screen assembly of the present invention;

FIG. 3 is a cross-sectional view of a flexible display screen and stiffener after crimping in an embodiment of a flexible screen assembly according to the present invention;

FIG. 4a is a schematic view of a flexible screen assembly according to an embodiment of the present invention, wherein the stiffener is connected to the flexible display;

FIG. 4b is a schematic view of a flexible screen assembly according to an embodiment of the present invention in which a stiffener is attached to a flexible display;

FIG. 4c is a schematic view of a flexible screen assembly according to an embodiment of the present invention in which a stiffener is attached to a flexible display;

FIG. 5a is a schematic view of a flexible screen assembly according to an embodiment of the present invention, wherein the stiffener is connected to the flexible display;

FIG. 5b is a schematic view of a stiffener connected to a flexible display screen according to an embodiment of the flexible screen assembly of the present invention;

FIG. 5c is a schematic view of a stiffener connected to a flexible display screen according to an embodiment of the flexible screen assembly of the present invention;

FIG. 5d is a schematic view of a flexible display screen connected to a stiffener according to an embodiment of the flexible screen assembly of the present invention;

FIG. 5e is a schematic view of a flexible screen assembly according to an embodiment of the present invention, wherein the stiffener is connected to the flexible display;

FIG. 5f is a schematic view of a stiffener connected to a flexible display screen according to an embodiment of the flexible screen assembly of the present invention;

FIG. 5g is a schematic view of a stiffener connected to a flexible display screen according to an embodiment of the flexible screen assembly of the present invention;

FIG. 6 is a schematic diagram illustrating an assembly of a driving module and a roller according to an embodiment of the flexible screen assembly of the present invention;

FIG. 7 is a cross-sectional view of a spool of one embodiment of the flexible screen assembly of the present invention;

FIG. 8 is another cross-sectional view of a roller shaft of an embodiment of a flexible screen assembly of the present invention;

FIG. 9 is a schematic block diagram of a driver module in an embodiment of a flexible screen assembly according to the present invention;

fig. 10 is a schematic structural view of an embodiment of the flexible screen assembly of the present invention.

Reference numerals illustrate:

10. a flexible display screen; 10a, a flexible substrate; 10b, conductive electrodes; 10c, lamp beads; 10d, packaging layer; 10e, a background layer; 10f, reinforcing ribs; 11. FPC flat cable; 12. a display area; 13. a first stress relief region; 14. a second stress relief region; 20. a winding and unwinding assembly; 21. a reel; 21a, a containing space; 21b, a first cavity; 21c, a second cavity; 211. a first cylinder; 211a, a first opening; 212. a second cylinder; 212a, a second opening; 22. a driving member; 23. a fixing member; 24. a connecting member; 30. a driving module; 31. a data receiving module; 32. a display drive IC; 33. a driving plate; 34. a connecting plate; 35. a switching structure; 40. a counterweight structure; 50. a first housing; 60. second housing

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a flexible screen assembly.

In an embodiment of the present invention, as shown in fig. 1 to 4a, the flexible screen assembly includes a flexible display screen 10, a winding and unwinding assembly 20 and a driving module 30.

Specifically, the flexible display screen 10 refers to a screen having both display capability and bending capability, and may be configured as an LED display screen, a miniLED display screen, or an OLED (Organic Light-Emitting Diode) display screen. Specifically, in this embodiment, the flexible display screen 10 is a flexible transparent LED display screen, and the flexible transparent LED display screen may be configured to display on one side (i.e., LED light beads are disposed on only one side of the flexible transparent LED display screen), or display on both sides simultaneously (i.e., LED light beads are disposed on both sides of the flexible transparent LED display screen simultaneously). When the flexible transparent LED display screen is set to be displayed on one side, colored backgrounds, such as black background templates, white background templates and the like, can be arranged on the non-display side of the flexible transparent LED display screen so as to improve the display effect of the flexible transparent LED display screen. The LED lamp beads may be an RGB package with a built-in control chip or an RGB package without a built-in control chip, but are not limited thereto.

The unwind and wind assembly 20 comprises a reel 21, which reel 21 is in this embodiment arranged cylindrically. Of course, in other embodiments, the spool 21 may be configured to be approximately circular, such as oval, square, hexagonal, octagonal, etc. The material of the reel 21 may be ceramic (such as alumina, zirconia, etc.), metal (such as aluminum alloy, stainless steel, etc.), plastic (such as phenolic resin, epoxy resin, etc.), or a composite of the three. In this embodiment, the reel 21 is connected to one end of the flexible display screen 10.

In the solution of the present application, the reel 21 can be controllably rotated to wind the flexible display screen 10 around the reel 21 or release the flexible display screen 10 wound around the reel 21. In this case, since the rotation of the reel 21 is controllable, the flexible display 10 is not completely wound or unwound each time, and only a part of the flexible display 10 may be wound or unwound each time. It should be appreciated that the rolling does not damage the flexible display 10, and thus the flexible display 10 can normally display a picture even in the semi-unrolled/rolled state. It should be noted that the controllable rotation of the reel 21 also includes that the reel 21 can wind/unwind the flexible display 10 according to a predetermined rule. For example, when the flexible screen assembly of the present application is used as a window covering, the roller 21 may automatically wind up or release the flexible display screen 10 according to the local sunrise/sunset time.

The driving module 30 includes a data receiving module 31 and a display driving IC32, and the data receiving module 31 is electrically connected to the display driving IC32. The data receiving module 31 may include a wired receiving module, such as an RJ-45 interface, an RJ-11 interface, an SC fiber interface, an FDDI interface, an AUI interface, a BNC interface, a cone interface, etc.; may also be configured to include a wireless receiving module, such as a WI-FI module, a Bluetooth module, a 2.4G communication module, an infrared receiving module, a 2G/3G/4G/5G communication module, etc.; or is configured to include ase:Sub>A datase:Sub>A socket, such as ase:Sub>A USB-A interface, ase:Sub>A USB-C interface, ase:Sub>A TF card slot, an SD card slot, ase:Sub>A lightning interface. Of course, the data receiving module 31 may also be configured to include any two or all of a wired receiving module, a wireless receiving module and a data socket. The data receiving module 31 is capable of receiving picture data and video data and transmitting them to the display driving IC32. It should be understood that other types of data, such as control signal data, audio data, etc., can be received in addition to the picture data and video data. The driving module 30 is connected to the same end of the flexible display 10 as the reel 21, and the flexible display 10 is electrically connected to the driving IC. The display driving IC32 can send a control signal to the flexible display 10 according to the picture data or the video data received by the data receiving module 31, so as to control the flexible display 10 to play a corresponding picture or video.

This flexible screen subassembly of technical scheme is through connecting the one end of flexible display screen 10 in spool 21 to connect drive module 30 at the same end of flexible display screen 10, so, through the rotation of spool 21, can rolling or expand flexible display screen 10, thereby can reduce the occupation space of screen when the storage, carrying when obtaining bigger display surface, in order to compromise display device's display area and occupation space simultaneously. Meanwhile, the winding mode does not cause crease on the screen, and is beneficial to ensuring long-term display effect of the flexible display screen 10. Therefore, compared with the traditional folding display screen, the flexible screen assembly has the advantages of large display area, small occupied space during storage, good display effect, high stability and long service life.

Further, in the present embodiment, the flexible display 10 is provided with a plurality of reinforcing ribs 10f, the reinforcing ribs 10f extending in the axial direction of the reel 21, and the plurality of reinforcing ribs 10f being arranged at intervals in the winding-unwinding direction of the flexible display 10.

It should be noted that, as shown in fig. 3, after the flexible display screen 10 is wound around the reel 21, both sides of the flexible display screen 10 in the axial direction of the reel 21 may tilt upward and inward to form a "bowl-shaped tilt" (i.e., an inverted C-shaped tilt). Especially after many times of winding, the warping situation on two sides of the flexible display screen 10 is gradually aggravated, and even permanent warping occurs, so that the flexible display screen 10 is always in a warping state, and the user experience is seriously affected.

According to the flexible screen assembly, the plurality of reinforcing ribs 10f extending along the axial direction of the scroll 21 are arranged on the flexible display screen 10, and the plurality of reinforcing ribs 10f are arranged at intervals in the winding and unwinding direction (namely, the direction perpendicular to the scroll 21) of the flexible display screen 10. So, can be under the condition that does not influence flexible display 10 crooked, provide the coercivity (provide holding power for flexible display 10 promptly) for flexible display 10 through strengthening rib 10f, avoid flexible display 10 to appear the public phenomenon of warping of bowl to guarantee the roughness of flexible display 10 under long-term use, and then in order to guarantee the display effect after flexible display 10 rolls up repeatedly.

Further, the flexible display screen 10 includes a flexible base layer 10a, a lamp bead 10c, a conductive electrode 10b, and an encapsulation layer 10d.

Specifically, the flexible base layer 10a is a substrate of the flexible display screen 10, which is used to support the conductive electrodes 10b, the lamp beads 10c, and the like, and can maintain the continuity of the encapsulation layer 10d. Specifically, the flexible substrate 10a may be made of PE, PET, CPI, PC, PUI, PI, PP, PEN, SRF, COC, COP, PEEK, PMMA, PSSU or the like and mixtures thereof. Further, the thickness of the flexible substrate 10a is 3um to 1mm, preferably 9um to 300 um. Illustratively, the thickness of the flexible substrate 10a may be 3um, 4um, 5um, 6um, 7um, 8um, 9um, 10um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, 100um, 200um, 300um, 400um, 500um, 600um, 700um, 800um, 900um, 1mm, etc.

Specifically, the conductive electrode 10b is disposed on the flexible substrate 10a, and the conductive electrode 10b forms a metal grid circuit (mainly including VCC, GND, din, dout electrodes) for electrically connecting with the lamp bead 10c, the resistor, the capacitor, and other electrical components. In some embodiments, the electrode is surface treated with specific optical property materials to reduce electrode visibility (reduce electrode reflectivity and environmental chromaticity adjustment), maintain conductivity and higher environmental reliability. Specifically, the main material of the conductive electrode 10b may be copper, silver, nickel, gold, stainless steel, or an alloy of these materials. The characteristic optical material may be silver white or black, and when silver white, the characteristic optical material may be made of tin, nickel, silver, chromium, gold, copper, or the like, and alloys of these materials. In the case of black, the characteristic optical material may be made of tin, nickel, silver, chromium, copper, or the like, and oxides, nitrides, oxynitrides, or the like of alloys of the foregoing materials. Further, the line width of the conductive electrode 10b is preferably between 1um and 5mm, more preferably between 3um and 1 mm. The line spacing of the metal grid lines is preferably between 1um and 5mm, and more preferably between 10um and 1 mm. The thickness of the conductive electrode 10b is preferably between 200nm and 1mm, and more preferably between 0.1um and 100 um.

Specifically, the lamp bead 10c is an LED lamp bead, which is essentially an RGB package with a built-in chip. Specifically, R/G/B is gallium phosphide (GaP), gallium aluminum arsenide (GaAlAs) or gallium arsenide (GaAs), respectively. The package of the lamp bead 10c is made of PE, PP, acrylic resin and other materials, and the chip base material is silicon, glass, sapphire and the like. Further, the package length and width dimensions are between 0101-8080 (wherein 0101 refers to 0.1mm by 0.1mm length and width of the lamp bead 10c, and so on). The RGB package preferably has a thickness of 0.05mm to 4mm, more preferably 0.3mm to 2 mm.

Specifically, the encapsulation layer 10d constitutes the surface of the flexible display screen 10, which serves to protect the lamp beads 10c, the conductive electrodes 10b, the flexible base layer 10a, and the like and serves as an adhesive between the layers. Specifically, the encapsulation layer 10d may be transparent or opaque, and when the encapsulation layer 10d is opaque, the encapsulation layer 10d may be encapsulated on the non-light-emitting side of the flexible display screen 10. When the encapsulation layer 10d is transparent, it may be made of EVA, PVB, 3GP, POE, TPU, TPE, PUI, CPI film, rubber or rubber doped epoxy, acryl resin, etc. and composite materials thereof. However, when the encapsulation layer 10d is opaque, it may be made of colored EVA, PVB, 3GP, POE, TPU, TPE, PUI, CPI film, rubber or rubber doped epoxy, acryl resin, etc. and composite materials thereof. Wherein, the color material can be color-mixed by high temperature resistant pigment (such as Al2O3, graphite, etc.).

Further, the thickness of the encapsulation layer 10d is preferably 1nm to 5mm, more preferably 100nm to 2 mm. By way of example, the thickness of the package may be at 1nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 900nm, 1000nm, 10um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, 100um, 200um, 300um, 400um, 500um, 600um, 700um, 900um, 1000um, 2mm, 3mm, 4mm, 5mm, etc. It should be noted that the package layer 10d may be integrally packaged, or may be packaged for a single RGB package.

In some embodiments, the flexible display screen 10 further includes a background layer 10e (as shown in fig. 5 d), where the background layer 10e is disposed on the non-light-emitting side of the light bead 10c, and the background layer 10e is used to provide a background color to enhance the display effect of the flexible display screen 10. In some embodiments, the background layer 10e may be provided as a liquid crystal dimming film capable of changing the transparency of the display area 12 of the flexible display screen 10 by rotation of the internal liquid crystal. In other embodiments, the background layer 10e may be configured as an electrochromic film that is capable of undergoing an electrochemical redox reaction to change the transparency of the display area 12 of the flexible display screen 10 upon energization. In other embodiments, the background layer 10e may be formed as a colored paper or other color material film, such as a plastic material of aramid paper, fiber reinforced paper, etc., as a substrate, and a pattern or text formed by a high temperature resistant pigment, graphite paste, etc.

As shown in fig. 4a, in some embodiments, the stiffener 10f is disposed on the surface of the flexible display screen 10, and the stiffener 10f is disposed on the light emitting side of the light bead 10c, at this time, the stiffener 10f and the light bead 10c are sequentially staggered in the winding and unwinding direction of the flexible display screen 10. In this way, the reinforcing ribs 10f can avoid the lamp beads 10c, so as to ensure the display effect of the flexible display screen 10. In this case, when the flexible display 10 is a double-sided display, the reinforcing ribs 10f may be provided on one side surface or both side surfaces of the flexible display 10.

As shown in fig. 4b, in some embodiments, the stiffener 10f is disposed on the surface of the flexible display 10, and the stiffener 10f is disposed on the non-light-emitting side of the light bead 10c, where the projection of the stiffener 10f on the surface of the flexible display 10 is within the projection of the light bead 10 c. In other words, the reinforcing ribs 10f are overlapped with the beads 10c in the thickness direction of the flexible display screen 10, and the width of the reinforcing ribs 10f is not greater than the width of the beads 10 c. In this manner, the projection of the stiffener 10f may be located within the projection of the light bead 10 c. The setting like this for strengthening rib 10f can overlap with lamp pearl 10c, on the one hand, and then with reducing strengthening rib 10f to flexible display screen 10 display effect, on the other hand then can promote flexible display screen 10's printing opacity homogeneity, and then with the impression that promotes flexible display screen 10.

As shown in fig. 4c, in some embodiments, the stiffener 10f is disposed on the surface of the flexible display 10, and the stiffener 10f is disposed on the non-light-emitting side of the light bead 10c, where the stiffener 10f and the light bead 10c are sequentially staggered in the winding and unwinding direction of the flexible display 10. In this way, the reinforcing ribs 10f can avoid the lamp beads 10c, so as to ensure the display effect of the flexible display screen 10.

As shown in fig. 5a, in some embodiments, the reinforcing ribs 10f are embedded in the flexible display screen 10, and the reinforcing ribs 10f are disposed on the light emitting side of the light beads 10c, at this time, the reinforcing ribs 10f and the light beads 10c are sequentially staggered in the winding and unwinding directions of the flexible display screen 10. Specifically, the reinforcing ribs 10f are buried in the encapsulation layer 10 d. In this way, the reinforcing ribs 10f can avoid the lamp beads 10c, so as to ensure the display effect of the flexible display screen 10. Here, when the flexible display 10 is a double-sided display, the reinforcing ribs 10f may be embedded in the encapsulation layers 10d on both sides in the thickness direction of the flexible display 10, or the reinforcing ribs 10f may be embedded in only the encapsulation layers 10d on one side of the flexible display 10.

As shown in fig. 5b, in some embodiments, the reinforcing ribs 10f are embedded in the flexible display screen 10, and the reinforcing ribs 10f are disposed on the non-light-emitting side of the light beads 10c, at this time, the reinforcing ribs 10f and the light beads 10c are sequentially staggered in the winding and unwinding directions of the flexible display screen 10. Specifically, the reinforcing ribs 10f are buried in the encapsulation layer 10d on the other side of the flexible display panel 10.

As shown in fig. 5c, in some embodiments, the stiffener 10f is embedded in the flexible display 10, and the stiffener 10f is disposed on the non-light-emitting side of the light bead 10c, where the projection of the stiffener 10f on the surface of the flexible display 10 is within the projection of the light bead 10 c. In other words, the reinforcing ribs 10f are overlapped with the beads 10c in the thickness direction of the flexible display screen 10, and the width of the reinforcing ribs 10f is not greater than the width of the beads 10 c. Specifically, the reinforcing ribs 10f are buried in the encapsulation layer 10d on the other side of the flexible display panel 10.

As shown in fig. 5d, in some embodiments, the flexible display screen 10 has a background layer 10e, the stiffener 10f is embedded in the flexible display screen 10, and the stiffener 10f is disposed on the non-light-emitting side of the light bead 10c, where the projection of the stiffener 10f on the surface of the flexible display screen 10 is in the projection of the light bead 10 c. In other words, the reinforcing ribs 10f are overlapped with the beads 10c in the thickness direction of the flexible display screen 10, and the width of the reinforcing ribs 10f is not greater than the width of the beads 10 c. Specifically, the rib 10f is buried in the background layer 10 e.

As shown in fig. 5e, in some embodiments, the flexible display screen 10 is a double-sided display screen, where the two sides of the flexible display screen 10 are provided with the reinforcing ribs 10f, and the reinforcing ribs 10f and the lamp beads 10c are sequentially staggered in the winding and unwinding directions of the flexible display screen 10. Specifically, the reinforcing ribs 10f are buried in the encapsulation layers 10d on both sides of the flexible display panel 10.

In some embodiments, as shown in fig. 5f, the flexible display 10 is a dual-sided display, where the stiffener 10f is disposed on both sides of the flexible display 10 and in the flexible substrate 10 a. Specifically, the reinforcing ribs 10f and the lamp beads 10c on both sides of the flexible display screen 10 are sequentially staggered in the winding and unwinding directions of the flexible display screen 10. The projection of the ribs 10f in the flexible substrate 10a onto the surface of the flexible display screen 10 is within the projection of the beads 10 c.

As shown in fig. 5g, in some embodiments, the flexible display 10 is a two-sided display, and the flexible display further includes a background layer 10e, where the background layer 10e is disposed between two flexible base layers 10 a. At this time, the reinforcing ribs 10f are provided on both sides of the flexible display screen 10 and in both of the flexible base layers 10 a. Specifically, the reinforcing ribs 10f and the lamp beads 10c on both sides of the flexible display screen 10 are sequentially staggered in the winding and unwinding directions of the flexible display screen 10. The projection of the ribs 10f in the flexible substrate 10a onto the surface of the flexible display screen 10 is within the projection of the beads 10 c.

It should be noted that, in some embodiments, the reinforcing ribs 10f may be embedded in the flexible display screen 10 while being disposed on the surface of the flexible display screen 10.

In some embodiments, the deformation force of the flexible display 10 is set to be P ₁ The orthopedic force of the reinforcing rib 10f is P ₂ The following steps are:

/>

wherein E is ₂ >E ₁ ，P ₂ >P ₁ ；

Wherein f is a set deflection deformation amount, E ₁ An initial modulus of elasticity for the flexible display 10; i ₁ Is the moment of inertia of the flexible display screen 10; l (L) ₁ Is the length of the flexible display 10 along the axial direction of the scroll 21; e (E) ₂ The elastic modulus of the reinforcing rib 10 f; i ₂ The moment of inertia of the reinforcing rib 10 f; l (L) ₂ Is the length of the reinforcing rib along the axial direction of the 10f reel 21.

Specifically, as shown in fig. 3, after the flexible display 10 is curled, a cross section parallel to the axial direction of the roller 21 of the flexible display 10 can be obtained, and the warping condition of both sides of the flexible display 10 can be found to be substantially uniform by observing the cross section. In this way, we can calculate the stress of only one side of the flexible display screen 10. Since the portion of the flexible display 10 closer to the side is more severely warped and the portion closer to the center is less warped, the deformation condition is similar to that of a model after the cantilever beam is stressed. Therefore, when the stress calculation is performed on the warpage of one side of the flexible display screen 10, we can consider this side view as a cantilever beam with a single point fixed, and then calculate the formula according to the maximum deflection deformation amount of the cantilever beam:

The deformation force P generated by the flexible display screen 10 when the flexible display screen 10 is deformed with the maximum deflection is calculated, and the deformation force P can be also regarded as external applied load when the side edge of the flexible display screen 10 is driven to be warped to the maximum extent. In this case, when calculating the moment of inertia of the flexible display 10, the cross section of the flexible display 10 may be regarded as a rectangle to calculate the moment of inertia of the flexible display 10 from the rectangular moment of inertia. Specifically, the calculation formula of the rectangular moment of inertia is as follows:

wherein b ₁ And h ₁ Respectively the width and height of the section taken when calculating the moment of inertia of the flexible display screen 10。

Since the elastic modulus and the size of the flexible display screen 10 are all known data, we can set a deflection deformation f to calculate how much deformation force (i.e. P) is generated when the flexible display screen is warped (i.e. deflected deformation) with the deformation f ₁ Is a value of (2). Specifically, after transformation, we can get the following formula (1):

here, since the warp of the flexible display 10 after the winding is mainly caused by the encapsulation layer 10d, the elastic modulus of the encapsulation layer 10d may be directly used as the initial elastic modulus of the flexible display 10 for the convenience of calculation. Of course, in some embodiments, the modulus of elasticity of the flexible display 10 after conforming may also be calculated as the initial modulus of elasticity of the flexible display 10. The f represents the maximum deformation that can be achieved by the side of the flexible display 10 without affecting the display effect and the user's look and feel of the flexible display 10. f can be adaptively adjusted according to the actual application scene and the size of the flexible display screen 10, and the application is not particularly limited.

Further, for the reinforcing rib 10f, we can take half of the reinforcing rib 10f, and consider the half of the reinforcing rib 10f as a cantilever beam supported by a single point, and after the calculation formula of the maximum deflection deformation of the cantilever beam is changed, we can obtain the following formula (2):

similarly, we can calculate the moment of inertia of the stiffener 10f according to the rectangular moment of inertia formula, specifically as follows:

wherein b ₂ And h ₂ The width and height of the cross section taken when calculating the moment of inertia of the stiffener 10f are respectively.

In formula (2), P ₂ It is understood that the external load is required when the reinforcing rib 10f is deformed by the deformation amount f. Thus, if P ₂ >P ₁ It is explained that the deformation force generated when the flexible display 10 is warped by the deformation amount f is smaller than the externally applied load when the stiffener 10f is driven to warp by the deformation amount f. That is, the reinforcing rib 10f does not warp by the deformation amount f. Because the reinforcing ribs 10f are arranged on the flexible display screen 10, the flexible display screen 10 cannot warp under the limitation of the reinforcing ribs 10f, and further the flatness of the flexible display screen 10 can be ensured. In other words, when f=f _max At the time P ₂ >P ₁ The flexible display 10 will not warp. Wherein P is ₂ And P ₁ The larger the gap, the less likely the flexible display screen 10 will warp.

For the above reasons, in order to prevent the flexible display from warping, we set the width of the stiffener (i.e., b ₂ ) Thickness of the reinforcing rib (i.e. h ₂ ) Modulus of elasticity E of the reinforcing rib ₂ The following conditions are satisfied:

(1)、E ₂ >E ₁ ；

(2)、P ₂ >P ₁ 。

wherein limit E ₂ >E ₁ The purpose is to ensure that the stiffener can provide adequate support for the flexible display and to avoid oversized stiffener.

It can be understood that the specification material of the reinforcing ribs can provide enough support for the flexible display screen only by meeting the two conditions, and the flexible display screen is prevented from warping.

For example, assuming f=1mm, when the material of the encapsulation layer 10d of the flexible display screen 10 is EVA

E ₁ ＝3Mpa；

I ₁ ＝12500mm ⁴ (at this time, b ₁ h ₁ ＝100mm×5mm)；

P ₁ ＝0.63kg；

At this time, if PC is selected to manufacture the reinforcing rib 10f, b is set ₂ h ₂ =10mm×2mm, then

E ₂ ＝2100Mpa；

I ₂ ＝80mm ⁴ ；

P ₂ ＝2.9kg；

If FR4 is selected to manufacture the reinforcing rib 10f, b is arranged ₂ h ₂ =10mm×2mm, then

E ₂ ＝24000Mpa；

I ₂ ＝80mm ⁴ ；

P ₂ ＝33kg；

Obviously, whether PC or FR4 is selected to produce the reinforcing rib 10f, there is P ₂ >P ₁ In other words, the reinforcing ribs 10f made of PC and FR4 according to the above dimensions are sufficient to support the flexible display screen 10 of EVA as the material of the encapsulation layer, avoiding warpage. I.e. both PC and FR4 can be used as the material for the stiffener 10f of the flexible display 10.

It should be noted that, the material and the size of the stiffener 10f may be adaptively selected according to the actual application scenario and the size of the flexible display 10, and the application is not limited except that the above conditions are required to be satisfied.

For example, the materials of the reinforcing ribs 10f may be referred to as the following table:

alternatively E ₂ >3Mpa. It will be appreciated that setting the modulus of elasticity of the stiffener 10f to be greater than 3MPa can exclude materials that cannot be used to support the flexible display 10 to ensure that the stiffener 10f can be used to support most flexible displays 10.

In some embodiments, the distance between adjacent light beads in the winding and unwinding directions of the flexible display screen 10 is w, and the minimum bending radius of the flexible display screen 10 is R; assuming that the width of the reinforcing rib 10f is b, there are:

here, the minimum bending radius of the flexible display 10 refers to the bending radius of the flexible display 10 at the innermost circumference when the flexible display 10 is wound on the reel 21, and for the convenience of calculation, we can use the outer diameter of the reel 21 as the minimum bending radius of the flexible display 10.

It will be appreciated that the width of the stiffener 10f is set to be not smaller than the pitch of the beads 10c and not larger than half the minimum bending radius of the flexible display 10, so that the influence of the stiffener 10f on the crimping performance of the flexible display 10 can be reduced while ensuring that the stiffener 10f can provide sufficient supporting force for the flexible display 10.

In some embodiments, given a spacing g between adjacent reinforcing ribs 10f, there are:

it will be appreciated that the spacing between adjacent stiffener 10f is set to be not less than the spacing of the beads 10c and not more than half the minimum bend radius of the flexible display 10, so that the effect of the stiffener 10f on the crimping performance of the flexible display 10 can be reduced while ensuring that the stiffener 10f can provide sufficient support for the flexible display 10.

In some embodiments, 0.2 mm.ltoreq.w.ltoreq.30 cm. That is, the pitch of the adjacent beads 10c in the winding and unwinding direction of the flexible display screen 10 is not less than 0.2mm and not more than 30cm. The distance 10f between adjacent beads can be adaptively designed according to the actual application scene and the actual design requirement of the flexible display screen 10, which is not particularly limited in the present application.

By way of example, w may be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm, 20cm, 21cm, 22cm, 23cm, 24cm, 25cm, 26cm, 27cm, 28cm, 29cm, 30cm.

In some embodiments, 0.4 mm.ltoreq.R.ltoreq.70 cm. That is, the minimum bending radius of the flexible display screen 10 is not less than 0.4mm and not more than 70cm. The minimum bending radius of the flexible display screen 10 can be adaptively designed according to the actual application scenario and the actual design requirement of the flexible display screen 10, which is not particularly limited in the present application.

By way of example, R may be 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm, 20cm, 21cm, 22cm, 23cm, 24cm, 25cm, 26cm, 27cm, 28cm, 29cm, 30cm, 31cm, 32cm, 33cm, 34cm, 35cm, 36cm, 37cm, 38cm, 39cm, 40cm, 41cm, 42cm, 43cm, 44cm, 45cm, 46cm, 47cm, 48cm, 49cm, 50cm, 51cm, 52cm, 53cm, 54cm, 55cm, 58cm, 62cm, 66cm, 67cm, 60cm, 67cm, and the like.

In some embodiments, the thickness t of the flexible base layer 10a of the flexible display screen 10 is set to _F Assuming that the thickness of the reinforcing rib 10f is h, there are:

h≥t _F 。

It will be appreciated that the thickness of the stiffener 10f is set to be not less than the thickness of the flexible base layer 10a, which on one hand helps to ensure that the stiffener 10f can provide sufficient supporting force for the flexible display 10, and on the other hand can prevent the width of the flexible display 10 from being too wide, so as to limit the size of the stiffener 10f and further ensure the display effect of the flexible display 10.

In some embodiments, 3 um.ltoreq.t _F And less than or equal to 300um. That is, the thickness of the flexible base layer 10a is not less than 3um and not more than 300um. Wherein, the thickness of the flexible base layer 10a can be adaptively designed according to the actual application scene and the actual design requirement of the flexible display screen 10There is no particular limitation in this regard.

Illustratively, the thickness of the flexible substrate may be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 80, 90, 100, 200, 300, etc.

In some embodiments, the total thickness of the flexible display 10 is set to t _t The following steps are:

h≤t _t 。

it can be understood that the thickness of the reinforcing rib 10f is set to be not greater than the total thickness of the flexible display screen 10, so that on one hand, the reinforcing rib 10f can be buried in the flexible display screen 10 on the basis of ensuring that the reinforcing rib 10f provides sufficient supporting force for the flexible display screen 10, and on the other hand, the thickness of the reinforcing rib 10f can be limited, so that when the reinforcing rib 10f is arranged on the surface of the flexible display screen 10, the screen look and feel and the display effect of the flexible display screen 10 are not excessively affected.

In some embodiments, 9 um.ltoreq.t _t Less than or equal to 5mm. That is, the total thickness of the flexible display screen 10 is not less than 9um and not more than 5mm. The total thickness of the flexible display screen 10 can be adaptively designed according to the actual application scenario and the actual design requirement of the flexible display screen 10, which is not particularly limited in the present application.

By way of example only, and not by way of limitation, the total thickness of the flexible display screen may be 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2, 4, 5, etc. the flexible display screen may be flexible display screen.

In some embodiments, the drive module 30 is disposed on the same side of the flexible display screen 10 as the unwind and wind assembly 20. Specifically, in some embodiments, the drive module 30 may be configured to rotate and stop in synchronization with the spool 21, where the drive module 30 is capable of rotating with the spool 21 when the spool 21 rotates and the drive module 30 is stopped when the spool 21 stops rotating. By the arrangement, interference with the driving module 30 during winding of the flexible display screen 10 can be avoided, and free winding and unfolding of the flexible display screen 10 can be further realized. In other embodiments, the drive module 30 may be configured to rotate relative to the spool 21, in which case the drive module 30 does not rotate with rotation of the spool 21. At this time, the driving module 30 and the flexible display screen 10 may be connected through a slip ring (e.g., an electrical slip ring, a fluid slip ring, an optical slip ring, etc.).

Illustratively, if the flexible display 10 is unfolded and then extended in the up-down direction, the winding and unwinding assembly 20 is disposed at the upper end of the flexible display 10. Then, when the reel 21 rotates clockwise (of course, it may be set to rotate counterclockwise), the flexible display screen 10 can be wound on the reel 21, and when the reel 21 rotates counterclockwise, the flexible display screen 10 wound on the reel 21 can be released and then be unwound into a complete screen. The unfolded display screen can play pictures and/or videos by matching with the driving module 30.

It should also be noted that in some embodiments, when the flexible display 10 is released from the roller 21, the flexible display 10 may be automatically unwound under the force of gravity or may be unwound under the force of a driving force. The traction force may be provided by a drive mechanism having a drive end that may be coupled to the drive module 30 or directly to the other end of the flexible display 10. The drive mechanism may be configured as an active mechanism, such as a motor, cylinder, hydraulic cylinder, etc., or may be configured to include a passive mechanism, such as a spring, wrap spring, etc.

In some embodiments, the drive module 30 is provided to the spool 21. In this way, the driving module 30 can be driven by the reel 21 to rotate synchronously with the reel 21 and stop synchronously, so that the synchronism of the movement between the driving module 30 and the reel 21 can be improved, and the structural complexity of the flexible screen assembly can be reduced. Specifically, the driving module 30 may be disposed outside the spool 21, inside the spool 21, or in the shaft body of the spool 21 in the radial direction of the spool 21; in the axial direction of the spool 21, the drive module 30 may be provided at either end of the spool 21 or between both ends of the spool 21. Of course, the design of the present application is not limited thereto, and in some embodiments, the driving module 30 may be disposed separately from the spool 21, and at this time, the driving module 30 may be driven by a driving mechanism separate from the spool 21, so as to achieve synchronous rotation and stop of the driving module 30 and the spool 21.

Referring to fig. 2, 6, 7, 8 and 9, in some embodiments, a housing space 21a is provided in the roller 21, a first opening 211a is provided on the roller 21 and is in communication with the housing space 21a, and the driving module 30 is disposed in the housing space 21a and is electrically connected to the flexible display screen 10 through the first opening 211 a. That is, the driving module 30 is disposed in the reel 21, so that the flexible display screen 10 and the driving module 30 can be prevented from interfering with each other, and the reel 21 can be freely wound on the reel 21. In addition, the driving module 30 is arranged in the scroll 21, so that the complexity of the structure of the scroll 21 can be reduced while solving the problem of space. Of course, the design of the present application is not limited thereto, and in other embodiments, the driving module 30 may be disposed at other positions of the spool 21.

In some embodiments, the driving module 30 further includes a driving board 33 and a connecting board 34, the driving board 33 is disposed on the display driving IC32 and the data receiving module 31, the connecting board 34 is electrically connected to the driving board 33, a plurality of first interfaces (not labeled) are disposed on the connecting board 34, the plurality of first interfaces are connected to a plurality of flat cables of the flexible display 10 one by one, and a second interface (not labeled) is disposed on the connecting board 34, and the second interface is connected to the driving board 33.

Specifically, one end of the flexible display screen 10 connected to the driving IC is provided with a plurality of FPC (Flexible Printed Circuit) flat cables, and the plurality of FPC flat cables 11 are provided with conductive lines, and these conductive lines can transmit current signals and voltage signals, so that not only can power the pixel units on the flexible display screen 10, but also the pixel units can be lightened with set brightness and color. The flexible display panel 10 is electrically connected to the display drive IC32 through the FPC flat cable 11. It should be noted that, in some embodiments, the flexible display screen 10 may also be electrically connected to the display driver IC32 through an FPC cable 11. It should be understood that the design of the present application is not limited thereto, and in other embodiments, the flexible display screen 10 may also be electrically connected to the display drive IC32 through a PCB, wiring harness, or the like.

Optionally, the conductive traces on the FPC bus 11 may be metal or transparent conductive traces (mainly made of ITO and nano-silver metal grid lines).

Alternatively, the length of the FPC bus 11 is 0.5mm to 30cm. Preferably, the length of the PFC bus is between 5mm and 20cm. By way of example, the length of FPC flex 11 may be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 20.0mm, 30.0mm, 40.0mm, 50.0mm, 60.0mm, 70.0mm, 80.0mm, 90.0mm, 100.0mm, 200mm.

Specifically, the plurality of first interfaces on the connection plate 34 are sequentially arranged at intervals along the length direction of the spool 21.

It should be noted that, since the number of FPC cables 11 on the flexible display 10 is determined according to the width (or pixels in the width direction) of the flexible display 10, that is, the number of FPC cables 11 is difficult to reduce. Accordingly, if the driving board 33 is to be electrically connected to the flexible display screen 10, a corresponding number of interfaces need to be provided, which may cause the size of the driving board 33 to be difficult to be reduced, and thus cause the occupation space of the driving module 30 to be large.

For the above reasons, the technical solution of the present application sets the driving board 33 to be electrically connected with the flexible display screen 10 through the connecting board 34, so that the length of the connecting board 34 can be set to be adapted to the width of the flexible display screen 10, and meanwhile, the size of the driving board 33 is set to be relatively smaller, so that the occupied space of the flexible display screen 10 can be reduced on the basis of ensuring that the driving module 30 is normally connected with the flexible display screen 10. That is, the above design has the advantage of reducing the space occupied by the driving module 30.

In some embodiments, the drive board 33 is provided as a flexible circuit board, but may also be provided as a rigid printed circuit board.

In some embodiments, the connection board 34 may be provided as a rigid printed circuit board or as a flexible circuit board.

In some embodiments, the driving module 30 may further include DC-DC, AC-DC, etc. modules, which may be collected on the driving board 33 or may be separately disposed, and through which the driving module 30 can supply power to the flexible display screen 10 through the FPC flat cable 11.

Alternatively, the width of the drive plate 33 is between 0.5cm and 20cm. Preferably, the width of the driving plate 33 is 1cm-5cm. Illustratively, the width of the drive plate 33 may be 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.0cm, 2.0cm, 3.0cm, 4.0cm, 5.0cm, 6.0cm, 7.0cm, 8.0cm, 9.0cm, 10.0cm, 20.0cm, etc.

Further, the driving board 33 is further provided with a connection port (not shown) for interfacing the driving board 33. The connection port can be made into a socket type by ceramics (such as alumina, zirconia and the like), metals (such as silver, copper alloy, aluminum alloy, stainless steel and the like), plastics (PU, PC, PMMA, silica gel, phenolic resin, epoxy resin and the like) or composite materials of the three materials and the like.

In some embodiments, the receiving space 21a includes a first cavity 21b and a second cavity 21c.

Further, the scroll 21 includes a first cylinder 211 and a second cylinder 212, wherein the first cylinder 211 is connected with the flexible display 10, the second cylinder 212 is disposed in the first cylinder 211, the first cylinder 211 and the second cylinder 212 form the first cavity 21b therebetween, a first opening 211a is disposed on the first cylinder 211, the second cylinder 212 is provided with the second cavity 21c, a second opening 212a is further disposed on the second cylinder 212, the first cavity 21b is communicated with the second cavity 21c through the second opening 212a, the driving plate 33 is disposed in the second cavity 21c, the adapter plate is disposed in the first cavity 21b, and the adapter plate is connected with the flexible display 10 through the first opening 211a and is connected with the driving plate 33 through the second opening 212 a. Specifically, the connection plate 34 may be fixed to the first cylinder 211 and/or the second cylinder 212, and the driving plate 33 may be fixed to the second cylinder 212.

It should be noted that, at least one end of the second cylinder 212 is provided with a communication port communicating with the second cavity 21c, and the communication port may be used for an external circuit or the like to enter the second cavity 21c to connect with the driving plate 33.

With the above-described structure, the drive plate 33 and the connection plate 34 can be separated in the radial direction of the spool 21, so that not only a long connection plate 34 but also a drive plate 33 can be provided with a sufficient space. In addition, the structure of the spool 21 can be simplified by separating the driving plate 33 and the connecting plate 34 by the second cylinder 212, so as to reduce the material cost and the assembly cost of the spool 21.

Of course, the present design is not limited thereto, and in other embodiments, the drive plate 33 and the connection plate 34 may be separated by providing other structures, such as by providing a partition in the spool 21 to separate the drive plate 33 and the connection plate 34; in some embodiments, the drive plate 33 and the connecting plate 34 may also be disposed within the same cavity.

In some embodiments, the drive module 30 further comprises an adapter structure 35, through which adapter structure 35 the connection plate 34 is connected to the drive plate 33. That is, the connection plate 34 and the driving plate 33 are connected by the switching structure 35. Based on the specific structure of the reel 21, the switching structure 35 passes through the second opening 212a to connect the driving plate 33 and the connecting plate 34.

Specifically, the switching structure 35 may be at least one of a patch panel and a patch cord. In other words, the connection board 34 and the driving board 33 may be connected through an interposer (such as a printed circuit board and a flexible circuit board), or may be connected through an interposer (such as a flexible harness), or may be connected through both the interposer and the interposer.

It will be appreciated that the provision of the adapter structure 35 to drive the plate 33 and the connection plate 34 enables the provision of the appropriate drive module 30 structure to be provided in accordance with the structure of the spool 21 to obtain an adapted mounting means and to provide the appropriate drive module 30 structure. Of course, the design of the present application is not limited thereto, and in other embodiments, the connection plate 34 may be directly connected to the driving plate 33 without the through structure 35.

Further, the winding and unwinding assembly 20 further includes a driving member 22, where the driving member 22 is disposed in the second cavity 21c, and the driving member 22 is in driving connection with the first cylinder 211 to drive the first cylinder 211 to rotate.

Specifically, the first cylinder 211 is rotatable relative to the second cylinder 212. In actual operation, the driving member 22 can drive the first cylinder 211 to rotate to wind or release the flexible display screen 10, and at this time, the second cylinder 212 can stop relative to the first cylinder 211. Of course, the design of the present application is not limited thereto, and in some embodiments, the second cylinder 212 and the first cylinder 211 may also be configured to rotate synchronously. At this time, the driving member 22 can directly drive the second cylinder 212 to rotate the first cylinder 211 through the second cylinder 212.

Specifically, the driving member 22 includes a motor that is disposed at a distance from the driving plate 33 in the axial direction of the spool 21. Since the length of the driving plate 33 can be set relatively short by the provision of the connection plate 34, the driving plate 33 and the motor can be simultaneously provided in the second chamber 21 c. Thus, the integration level of the flexible screen assembly can be greatly improved, and the volume of the flexible screen assembly can be reduced.

It will be appreciated that the first cylinder 211 is driven to rotate by a motor, and that the controllable rotation of the spool 21 can be achieved by control of the motor. For example, if the motor is a servo motor, a specific program may be written in the servo controller to realize control such as timing control and quantitative control of the spool 21. In addition, the servo controller can be connected with a wireless transceiver to realize remote control or remote control.

Optionally, the torque of the motor is between 0.1n·m and 1000n·m. For example, the torque of the motor may be 0.1 N.m, 1 N.m, 5 N.m, 10 N.m, 20 N.m, 30 N.m, 40 N.m, 50 N.m, 60 N.m, 70 N.m, 80 N.m, 90 N.m, 100 N.m, 200 N.m, 300 N.m, 400 N.m, 500 N.m, 600 N.m, 700 N.m, 800 N.m, 900 N.m, 1000 N.m, or the like.

Optionally, the motor has an outer diameter of 1cm to 30cm. Preferably, the motor has an outer diameter of 2.5cm to 5cm. For example, the outer diameter of the motor may be 1cm, 1.5cm, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, 4.5cm, 5cm, 5.5cm, 6cm, 6.5cm, 7cm, 7.5cm, 8cm, 8.5cm, 9cm, 9.5cm, 10cm, 12.5cm, 15cm, 17.5cm, 20cm, 22.5cm, 25cm, 27.5cm, 30cm, etc.

Optionally, the length of the motor is between 1cm and 2000cm. Preferably, the length of the motor is between 5cm and 100cm. For example, the motor may be 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm, 200cm, 300cm, 400cm, 500cm, 600cm, 700cm, 800cm, 900cm, 1000cm, 1500cm, 2000cm, etc. in length.

It should be appreciated that the torque, outer diameter and length of the motor may be adapted to the actual product.

Of course, the design of the present application is not limited thereto, and in other embodiments, the driving member 22 may also be configured to include a motor and a transmission assembly connected between the motor and the spool 21, and the transmission assembly may be configured as a reduction transmission assembly capable of increasing the output torque of the motor and reducing the rotation speed of the spool 21. The reduction drive assembly may be, for example, a gear drive assembly, a belt drive assembly, a chain drive assembly, or a combination of any two or three.

In some embodiments, the flexible screen assembly of the present application further includes a battery (not shown) electrically coupled to the driver 22 to power the driver 22 to enable the flexible screen assembly to be used independently, thereby helping to expand the range of applications of the flexible screen assembly. It should be appreciated that when the flexible screen assembly of the present application is employed in a self-contained power device (e.g., an electronic device), the driver 22 may be directly connected to the power source of the device.

Optionally, the battery is a detachable battery.

Optionally, the battery is provided as a rechargeable battery.

In some embodiments, the driver 22 has a plug (not shown) that can be connected to mains electricity, a mobile power source, a generator, etc., to enable the driver 22 to draw energy from the device. The plug is designed in a specification form adaptable mode according to different application environments. Alternatively, the motor may be an inner rotor motor or may be an outer rotor motor.

In some embodiments, the unwind and wind assembly 20 further includes a securing member 23, the securing member 23 being disposed between the spool 21 and the driving member 22 to secure the driving member 22 to the spool 21. The fixing member 23 may be provided as a fastener such as a screw or a fastener such as a buckle or a latch. Depending on the actual product, different fixtures 23 may be chosen.

Alternatively, the material of the fixing member 23 may be ceramic (such as alumina, zirconia, etc.), metal (such as aluminum alloy, stainless steel, etc.), plastic (such as phenolic resin, epoxy resin, etc.), or a composite material of the above three materials.

In some embodiments, the outer surface of the roller 21 is provided with a connection member 24, and the flexible display 10 is connected to the roller 21 by the connection member 24.

Alternatively, the connecting member 24 may be provided as an adhesive tape to adhesively bond the flexible display screen 10 to the reel 21. The adhesive tape can be a single-sided adhesive tape or a double-sided adhesive tape, and the adhesive tape can be made of single-sided and double-sided adhesive materials such as acrylic adhesive, epoxy resin, PU adhesive, silica gel and the like. It can be appreciated that the flexible display screen 10 is fixed by means of bonding, which has the advantages of convenient bonding and less damage to the display screen.

Optionally, the connection member 24 may be further configured as a clamping mechanism (not shown) to clamp the flexible display screen 10 by clamping, and specifically, the clamping mechanism includes a clamping portion and an elastic portion, where the elastic portion can provide an elastic driving force for the clamping portion, so that the clamping portion can clamp the flexible display screen 10. Optionally, the material of the clamping mechanism may be ceramic (such as alumina, zirconia, etc.), metal (such as aluminum alloy, stainless steel, etc.), plastic (such as phenolic resin, epoxy resin, etc.), or a composite material of the three. It will be appreciated that the flexible display 10 is secured by clamping, which has the advantage of easy disassembly and maintenance.

It should be understood that the specific connection manner of the flexible display 10 and the reel 21 may be adaptively selected according to the actual product, and is not limited to any one kind.

In some embodiments, the flexible display 10 includes a display area 12 and a first stress releasing area 13, the display area 12 is provided with a light bulb 10f, the light bulb 10f is electrically connected with the display driving IC32, the flexible display 10 displays images on the display area 12, and one end of the first stress releasing area 13 is connected with the display area 12, and the other end is connected with the reel 21.

The first stress relief region 13 is used to connect the display region 12 with the reel 21, except for the display region 12. When the flexible display 10 is rolled up, the first stress releasing area 13 is rolled up on the roller 21, and the display area 12 is rolled up on the roller 21 after the rolling up of the first stress releasing area 13 is completed. Since the pixel units are of a rigid structure, when the flexible display screen 10 is rolled, the pixel units close to the roller 21 are easy to squeeze the conductive lines due to the small bending radius, so that the conductive lines are damaged, and the normal display of the flexible display screen 10 is affected. By the first stress release area 13, when the flexible display screen 10 is rolled, the bending radius of the display area 12 can be increased, so that the pixel units and the conductive lines of the display area 12 cannot be mutually extruded, and further the pixel units or the conductive lines cannot be damaged, thereby being beneficial to improving the working stability of the flexible display screen 10 and prolonging the service life of the flexible display screen 10. In addition, the first stress releasing area 13 can also avoid hard contact between the pixel units of the display area 12 and the scroll 21, so that the pixel units can be protected, the working stability of the flexible display screen 10 can be improved, and the service life of the flexible display screen 10 can be prolonged.

Accordingly, the weight of the display area 12 and the driving module 30 is supported by the first stress relief region 13 when the flexible display 10 is unfolded. In this way, the stress of the display area 12 can be reduced, so as to avoid the deflection caused by overlarge stress/overlong stress of the pixel units and the conductive circuits in the display area 12, thereby helping to improve the working stability of the flexible display screen 10 and prolong the service life of the flexible display screen 10.

Alternatively, the length of the display area 12 is less than or equal to the length of the spool 21. Thus, the suspension condition during winding can be avoided, so that the service life of the flexible display screen 10 is prolonged.

Optionally, the width of the display area 12 is between 3cm and 100m. Preferably, the width of the display area 12 is between 10cm and 20m. By way of example, the width of the display area 12 may be 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm, 200cm, 300cm, 400cm, 500cm, 600cm, 700cm, 800cm, 900cm, 1000cm, 1500cm, 2000cm, 3000cm, 4000cm, 5000cm, 6000cm, 7000cm, 8000cm, 9000cm, 10000cm.

Alternatively, the thickness of the display area 12 is between 0.1mm and 10mm. Preferably, the thickness of the display area 12 is between 0.5mm and 7mm. By way of example, the display area 12 may have a thickness of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm.

In some embodiments, the length of the first stress relief region 13 is less than or equal to the circumference of the spool 21. By the arrangement, the display area of the display area 12 can be relatively increased on the basis of ensuring the display area and the service life of the flexible display screen 10, and meanwhile, the material cost of the flexible screen assembly can be reduced.

In some embodiments, the width of the first stress relief region 13 corresponds to the width of the display region 12. By the arrangement, the screen consistency of the flexible display screen 10 can be maintained, and further, the look and feel of the flexible display screen 10 can be improved. Since the width of the first stress relief region 13 is consistent with the width of the display region 12, the width range of the first stress relief region 13 can refer to the display region 12, and will not be described herein.

In some embodiments, the thickness of the first stress relief region 13 corresponds to the thickness of the display region 12. By the arrangement, the screen consistency of the flexible display screen 10 can be maintained, and further, the look and feel of the flexible display screen 10 can be improved. Since the thickness of the first stress relief region 13 is consistent with the width of the display region 12, the thickness range of the first stress relief region 13 can refer to the display region 12, and will not be described herein.

In some embodiments, the flexible display 10 further includes a second stress relief region 14, one end of the second stress relief region 14 being connected to the display region 12 and the other end being connected to the weight structure 40. That is, the display area 12 is connected to the weight structure 40 through the second stress relief region 14. By providing the second stress relief region 14, the stress at the connection between the display region 12 and the counterweight structure 40 can be reduced, thereby helping to improve the working stability of the flexible display 10 and extend the service life of the flexible display 10. In addition, the second stress relief region 14 can make the flexible display 10 more symmetrical, thereby helping to improve the look and feel of the flexible display 10. It should be noted that the design of the present application is not limited thereto, and in some embodiments, the second stress relief region 14 may not be provided.

In some embodiments, the width of the second stress relief region 14 corresponds to the width of the display region 12. By the arrangement, the screen consistency of the flexible display screen 10 can be maintained, and further, the look and feel of the flexible display screen 10 can be improved. Since the width of the second stress relief region 14 is consistent with the width of the display region 12, the width of the second stress relief region 14 can be referred to the display region 12, and will not be described herein.

In some embodiments, the thickness of the second stress relief region 14 corresponds to the thickness of the display region 12. By the arrangement, the screen consistency of the flexible display screen 10 can be maintained, and further, the look and feel of the flexible display screen 10 can be improved. Since the thickness of the second stress relief region 14 is consistent with the width of the display region 12, the thickness range of the second stress relief region 14 can refer to the display region 12, and will not be described herein.

In some embodiments, at least one of the first stress relief region 13 and the second stress relief region 14 is integrally formed with the display region 12. By selectively disposing the conductive motor 10b and the lamp bead 10f on the same flexible substrate 10a, the display area 12, the first stress relief area 13 and the second stress relief area 14 can be obtained. In this way, the production costs of producing the flexible screen assembly can be greatly reduced. Of course, the design of the present application is not limited thereto, and in other embodiments, at least one of the first stress relief region 13 and the second stress relief region 14 may be not integrally formed with the display region 12, but may be spliced with each other by bonding or the like.

In some embodiments, the flexible screen assembly of the present application further comprises a first housing 50 and a second housing 60, wherein the unwind assembly 20 and the drive module 30 are provided to the first housing 50; the weight structure 40 is disposed on the second housing 60, and the first housing 50 and the second housing 60 can be mated and abutted with each other. The first housing 50 provides protection and installation positions for the winding and unwinding assembly 20 and the driving module 30, and the second housing 60 provides protection and installation for the weight structure 40. In addition, the first housing 50 and the second housing 60 can be arranged to facilitate the installation of the flexible screen assembly in the practical application scene.

Specifically, when the flexible display screen 10 is fully rolled up, the first housing 50 and the second housing 60 can be abutted with each other, wherein the abutting includes a scheme of matching locking such as the first housing 50 and the second housing 60 are clamped with each other, and may also include a scheme of only splicing but not locking the first housing 50 and the second housing 60 with each other. By the cooperation of the first housing 50 and the second housing 60, the convenience of transportation of the flexible screen assembly can be improved.

Alternatively, at least one of the first housing 50 and the second housing 60 may be made of a material such as ceramic (e.g., alumina, zirconia, etc.), metal (e.g., silver, copper alloy, aluminum alloy, stainless steel, etc.), plastic (PU, PC, PMMA, silica gel, phenolic resin, epoxy resin, etc.), or a composite of the three. It should be understood that the size of the first housing 50 may be adaptively set according to the winding and unwinding assembly 20 and the driving module 30, and the size of the second housing 60 may be adaptively set according to the size of the weight structure 40, which are not particularly limited in this application.

As shown in fig. 10, in some embodiments, the driving module 30 and the winding and unwinding assembly 20 are separately disposed at two ends of the flexible display screen 10. The winding mechanism of the flexible display screen 10 can be separated from the driving unit, the complexity of the flexible screen assembly structure and the circuit is reduced, the stability of the product is improved, and the product is convenient to produce in the earlier stage and repair in the later stage.

The invention also provides electronic equipment, which comprises a shell and a flexible screen assembly, wherein the flexible screen assembly is arranged on the shell according to the embodiment. The electronic device adopts all the technical schemes of all the embodiments, so that the electronic device has at least all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

In particular, the electronic device includes, but is not limited to, a cell phone, an indoor display, an outdoor display screen, a smart curtain, and the like.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A flexible screen assembly, comprising:

a flexible display screen; the method comprises the steps of,

the flexible display screen is provided with a plurality of reinforcing ribs which extend along the axial direction of the scroll, and the plurality of reinforcing ribs are arranged at intervals along the winding and unwinding directions of the flexible display screen;

let the deformation force of the flexible display screen be P ₁ The orthopedic force of the reinforcing rib is p ₂ The following steps are:

wherein E is ₂ ＞E ₁ ，p ₂ ＞P ₁ ；

2. The flexible screen assembly of claim 1, wherein the flexible display screen has a plurality of light beads; the distance between adjacent lamp beads in the winding and unwinding directions of the flexible display screen is w, and the minimum bending radius of the flexible display screen is R; let the width of the stiffener be b, then there are:

3. A flexible screen assembly as recited in claim 1, wherein the flexible display screen comprises a flexible base layer having a thickness t _F Let the thickness of the stiffener be h, then there are:

h≥t _F 。

4. the flexible screen assembly of claim 2, wherein the flexible display screen has a plurality of light beads;

5. a flexible screen assembly as recited in claim 4, wherein,

w is more than or equal to 0.2mm and less than or equal to 30cm; and/or the number of the groups of groups,

0.4mm≤R≤70cm。

6. a flexible screen assembly as recited in claim 1, wherein the stiffener is disposed on a surface of the flexible display screen or embedded within the flexible display screen, wherein,

7. A flexible screen assembly as recited in claim 1, wherein the flexible display screen further comprises a background layer disposed on the non-light emitting side of the light beads, the background layer for providing a background color.

8. A flexible screen assembly as recited in claim 1, further comprising a drive module, the drive module comprising a display drive IC, the display drive IC being electrically connected to the flexible display screen, the drive module being disposed at a same end of the flexible display screen as the unwind and wind assembly, or the drive module being disposed at both ends of the flexible display screen separately from the unwind and wind assembly.

9. An electronic device, comprising:

shell body

A flexible screen assembly according to any one of claims 1 to 8, the flexible screen assembly being provided to the housing.