CN115116343A

CN115116343A - Flexible screen assembly and electronic equipment

Info

Publication number: CN115116343A
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: 2022-09-27
Anticipated expiration: 2042-07-29
Also published as: CN115116343B

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, wherein the winding and unwinding assembly comprises a scroll, the scroll is connected with one end of the flexible display screen, and the scroll can controllably rotate so as to wind the flexible display screen on the scroll and release the flexible display screen wound on the scroll; wherein, flexible display screen is equipped with a plurality of strengthening ribs, and the strengthening rib extends along the axial of spool, and the direction interval setting is unreeled along the receipts of flexible display screen to a plurality of strengthening ribs. 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.

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 take effective use area and storage occupation space of the display device into consideration, the current latest screen technology sets the screen to be in a foldable state, but the screen folding technology has the following disadvantages:

1. after being folded repeatedly, the screen is easy to crease, so that the display effect of the screen is poor;

2. the storage occupation space that the folding screen can reduce is still limited, can not furthest promote the proportion of display device display area and display device occupation storage space.

An exemplary technique provides a flexible screen assembly that includes a spool and a flexible display screen that is windable about the spool to save the display screen's footprint. However, in the exemplary technology, after the flexible display screen is rolled around the winding shaft, two side edges of the flexible display screen may warp when the flexible display screen is rolled out, which affects the display effect of the flexible display screen.

Disclosure of Invention

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

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

the winding and unwinding assembly comprises a reel, the reel is connected with one end of the flexible display screen, and the reel can controllably rotate so as to wind the flexible display screen on the reel and release the flexible display screen wound on the reel; wherein the content of the first and second substances,

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

In one embodiment, the deformation force of the flexible display screen is set to be P ₁ The orthopedic force of the reinforcing rib is P ₂ Then, there are:

wherein E is ₂ >E ₁ ，P ₂ >P ₁ ；

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

In one embodiment, the flexible display screen is provided with a plurality of lamp beads; the distance between adjacent lamp beads in the winding and unwinding direction of the flexible display screen is w, and the minimum bending radius of the flexible display screen is R; if the width of the reinforcing rib is b, the following steps are provided:

in one embodiment, the flexible display screen comprises a flexible base layer, and the thickness of the flexible base layer is t _F If the thickness of the reinforcing rib is h, the following are provided:

h≥t _F 。

in one embodiment, the flexible display screen is provided with a plurality of lamp beads;

the distance between the adjacent lamp beads arranged 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; if the distance between the adjacent reinforcing ribs is g, the following steps are performed:

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

In one embodiment, the reinforcing rib is disposed 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 rib is arranged on the non-luminous side of the lamp bead, the reinforcing rib and the lamp bead are sequentially staggered in the winding and unwinding directions of the flexible display screen, or the projection of the reinforcing rib on the surface of the flexible display screen is in the projection of the lamp bead.

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

In an embodiment, the flexible screen assembly further includes a driving module, the driving module includes a display driver IC, the display driver IC is electrically connected to the flexible display screen, 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 further provides electronic equipment which comprises a shell and the flexible screen assembly, wherein the flexible screen assembly is arranged on the shell.

This application technical scheme's flexible screen subassembly, through the one end with flexible display screen connect in the spool, so, through the rotation of spool, can the rolling or expand flexible display screen to can obtain when bigger display surface, reduce the occupation space of screen when storage, carrying, compromise display device's display area and occupation space simultaneously. Meanwhile, the screen cannot be folded in a rolling mode, and the long-term display effect of the flexible display screen is guaranteed. In addition, through set up a plurality of strengthening ribs that extend along the spool axial on flexible display to make a plurality of strengthening ribs set up at the receipts of flexible display and unreel the orientation interval. So, can be under the crooked circumstances of flexible display screen not influencing, provide coercive force for flexible display screen through the strengthening rib, avoid flexible display screen to appear the public perk phenomenon of bowl to guarantee the roughness of flexible display screen under long-term the use, and then with the display effect after guaranteeing flexible display screen and relapse the rolling. It is thus clear that compare in traditional foldable display screen, the flexible screen subassembly of this application has that display area is big, occupation space is little when accomodating, display effect is good, stability is high and long service life's advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of one embodiment of a flexible screen assembly of the present invention;

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

FIG. 3 is a cross-sectional view of a rolled flexible display screen and reinforcing ribs in an embodiment of a flexible screen assembly of the present invention;

FIG. 4a is a schematic view of the connection of the stiffener to the flexible display according to one embodiment of the flexible screen assembly of the present invention;

FIG. 4b is a schematic view of the connection of the stiffener to the flexible display according to one embodiment of the flexible screen assembly of the present invention;

FIG. 4c is a schematic view of the connection of the stiffener to the flexible display according to one embodiment of the flexible screen assembly of the present invention;

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

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

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

FIG. 5d is a schematic view of the connection between the stiffener and the flexible display according to one embodiment of the flexible screen assembly of the present invention;

FIG. 5e is a schematic view of the connection between the stiffener and the flexible display according to one embodiment of the flexible screen assembly of the present invention;

FIG. 5f is a schematic view of the connection between the stiffener and the flexible display according to one embodiment of the flexible screen assembly of the present invention;

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

FIG. 6 is a schematic view of an assembly of a drive module and a spool 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 a flexible screen assembly of the present invention;

FIG. 8 is another cross-sectional view of a spool of one embodiment of a flexible screen assembly of the present invention;

FIG. 9 is a block diagram of a drive module in an embodiment of a flexible screen assembly of the present invention;

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

The reference numbers illustrate:

10. a flexible display screen; 10a, a flexible base layer; 10b, a conductive electrode; 10c, lamp beads; 10d, packaging layers; 10e, a background layer; 10f, reinforcing ribs; 11. FPC cable arrangement; 12. a display area; 13. a first stress relief region; 14. a second stress relief region; 20. a reel retrieving and releasing assembly; 21. a reel; 21a, an accommodating 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 drive member; 23. a fixing member; 24. a connecting member; 30. a drive module; 31. a data receiving module; 32. a display driver IC; 33. a drive plate; 34. a connecting plate; 35. a switching structure; 40. a counterweight structure; 50. a first housing; 60. second housing

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "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 relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a flexible screen assembly.

In the 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 can be configured to display on a single side (i.e. only one side of the flexible transparent LED display screen is provided with LED beads), or display on both sides (i.e. simultaneously both sides of the flexible transparent LED display screen are provided with LED beads). When the flexible transparent LED display screen is set to be displayed on a single side, colored backgrounds such as a black background template and a white background template can be arranged on the non-display side of the flexible transparent LED display screen, so that the display effect of the flexible transparent LED display screen is improved. The LED lamp bead may be an RGB package with a built-in control chip or an RGB package without a built-in control chip, but is not limited thereto.

The winding and unwinding assembly 20 includes a winding shaft 21, and in this embodiment, the winding shaft 21 is disposed in a cylindrical shape. Of course, in other embodiments, the reel 21 may be configured to be approximately circular, such as oval, square, hexagon, octagon, 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 material of the three. In the present embodiment, the reel 21 is connected to one end of the flexible display 10.

In the present disclosure, the reel 21 is controllably rotated to wind the flexible display 10 on the reel 21 or release the flexible display 10 wound on the reel 21. Here, since the rotation of the reel 21 is controllable, the whole flexible display 10 is not completely rolled or unrolled every time the flexible display 10 is rolled/unrolled, and only a part of the flexible display 10 may be rolled/unrolled. It should be understood that the rolling does not damage the flexible display 10, so that the flexible display 10 can normally display the picture in the half-rolled/rolled state. It should be noted that the reel 21 is capable of controllably rotating, and the reel 21 is capable of winding/unwinding the flexible display screen 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 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 IC 32. The data receiving module 31 may include a wired receiving module, such as RJ-45 interface, RJ-11 interface, SC fiber interface, FDDI interface, AUI interface, BNC interface, Console interface, etc.; the wireless receiving module can be arranged to comprise a WI-FI module, a Bluetooth module, a 2.4G communication module, an infrared receiving module, a 2G/3G/4G/5G communication module and the like; or may be configured to include data ports such as USB-a ports, USB-C ports, TF slot ports, SD slot ports, and lightning ports. 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 jack. The data receiving module 31 is capable of receiving picture data and video data and transmitting them to the display driver IC 32. It should be understood that other types of data, such as control signal data, audio data, etc., can be received in addition to picture data and video data. The driving module 30 and the scroll 21 are connected to the same end of the flexible display 10, and the flexible display 10 is electrically connected to the driving IC. The display driver IC32 can send a control signal to the flexible display screen 10 according to the picture data or video data received by the data receiving module 31 to control the flexible display screen 10 to play corresponding pictures or videos.

This application technical scheme flexible screen assembly connects in spool 21 through the one end with flexible display screen 10 to drive module 30 is connected with one end at flexible display screen 10, so, through the rotation of spool 21, can the rolling or expand flexible display screen 10, thereby can be when acquireing bigger display surface, reduce the occupation space of screen when storage, carrying, in order to compromise display device's display area and occupation space simultaneously. Meanwhile, the rolling mode does not cause the screen to have creases, thereby being beneficial to ensuring the long-term display effect of the flexible display screen 10. It is thus clear that compare in traditional foldable display screen, the flexible screen subassembly of this application has that display area is big, occupation space is little when accomodating, display effect is good, stability is high and long service life's advantage.

Further, in this embodiment, the flexible display screen 10 is provided with a plurality of reinforcing ribs 10f, the reinforcing ribs 10f extend along the axial direction of the reel 21, and the plurality of reinforcing ribs 10f are arranged at intervals along the winding and unwinding direction of the flexible display screen 10.

It should be noted that, as shown in fig. 3, after the flexible display screen 10 is rolled around the rolling shaft 21, two side edges of the flexible display screen 10 in the axial direction of the rolling shaft 21 will tilt upwards and inwards to form a "bowl raised" shape (i.e. an inverted C-shaped raised shape). Especially, after rolling for many times, the tilting condition of the two sides of the flexible display screen 10 is gradually intensified, even permanent warping occurs, so that the flexible display screen 10 is always in a warping state, and the user experience is seriously influenced.

According to the flexible screen assembly in the technical scheme, 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 crooked circumstances of flexible display screen 10 not influencing, provide coercive force (for flexible display screen 10 provides holding power promptly) for flexible display screen 10 through strengthening rib 10f, avoid flexible display screen 10 to appear the phenomenon of the public stick up of bowl to guarantee the roughness of flexible display screen 10 under long-term the use, and then with the display effect after guaranteeing flexible display screen 10 to coil 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 10 d.

Specifically, the flexible base layer 10a is a substrate of the flexible display 10, and is used to support the conductive electrodes 10b, the beads 10c, and the like, and maintain the continuity of the encapsulation layer 10 d. Specifically, the flexible base layer 10a may be made of PE, PET, CPI, PC, PUI, PI, PP, PEN, SRF, COC, COP, PEEK, PMMA, PSSU, and the like, and mixtures thereof. Further, the thickness of the flexible substrate 10a is between 3um-1mm, preferably 9um-300 um. Illustratively, the thickness of the flexible base layer 10a can 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 base layer 10a, and the conductive electrode 10b forms a metal grid circuit (mainly including electrodes such as VCC, GND, Din, Dout, etc.), which is used to electrically connect with electrical components such as the lamp bead 10c, the resistor, and the capacitor. In some embodiments, the surface of the electrodes is treated with a material having specific optical properties to reduce the visibility of the electrodes (reduce the reflectivity of the electrodes and the environmental chromaticity adjustment), maintain electrical conductivity, and provide high 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, and the like, and alloys thereof. When black, the characteristic optical material may be made of an oxide, nitride, oxynitride, or the like of a material such as tin, nickel, silver, chromium, copper, or an alloy of the foregoing materials. Further, the line width of the conductive electrode 10b is between 1um-5mm, preferably between 3um-1 mm. The pitch of the metal grid lines is between 1um to 5mm, preferably between 10um to 1 mm. The thickness of the conductive electrode 10b is between 200nm-1mm, preferably between 0.1um-100 um.

Specifically, the lamp bead 10c is an LED lamp bead, which is substantially 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 packaging body of the lamp bead 10c is made of PE, PP, acrylic resin and other materials, and the chip substrate is silicon, glass, sapphire and the like. Further, the length and width of the package is 0101-8080 (wherein 0101 refers to 0.1mm × 0.1mm long and wide bead 10c, and so on). The thickness of the RGB package is between 0.05mm-4mm, preferably between 0.3mm-2 mm.

Specifically, the encapsulation layer 10d constitutes a surface of the flexible display screen 10, and is used for protecting the lamp beads 10c, the conductive electrodes 10b, the flexible base layer 10a, and the like, and is used as an adhesive between layers. Specifically, the encapsulating layer 10d may be configured to be transparent or opaque, and when the encapsulating layer 10d is configured to be opaque, the encapsulating layer 10d may be encapsulated on the non-light-emitting side of the flexible display screen 10. When the encapsulating 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 packaging 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, and the like, and composite materials thereof. Wherein the colored material may be toned with a high-temperature resistant coloring material (e.g., Al2O3, graphite, etc.).

Further, the thickness of the encapsulation layer 10d is between 1nm and 5mm, preferably between 100nm and 2 mm. Illustratively, the thickness of the package can 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 an integral package or a package for a single RGB package.

In some embodiments, the flexible display 10 further includes a background layer 10e (as shown in fig. 5 d), the background layer 10e is disposed on the non-light emitting side of the lamp bead 10c, and the background layer 10e is used for providing a background color to enhance the display effect of the flexible display 10. In some embodiments, the background layer 10e can be configured as a liquid crystal dimming film that can be rotated by internal liquid crystals to change the transparency of the display area 12 of the flexible display 10. In other embodiments, the background layer 10e may be provided as an electrochromic film capable of undergoing an electrochemical redox reaction to change the transparency of the display area 12 of the flexible display 10 when energized. In other embodiments, the background layer 10e may also be provided as a colored paper or other colored material film, such as a plastic material, such as aramid paper, fiber reinforced paper, etc., as a substrate, and a pattern or a character formed by high temperature resistant dye, graphite slurry, etc.

As shown in fig. 4a, in some embodiments, the reinforcing rib 10f is disposed on the surface of the flexible display screen 10, and the reinforcing rib 10f is disposed on the light emitting side of the lamp bead 10c, at this time, the reinforcing rib 10f and the lamp bead 10c are sequentially staggered in the winding and unwinding direction of the flexible display screen 10. Set up like this, position lamp pearl 10c can be kept away to strengthening rib 10f to guarantee flexible display screen 10's display effect. Here, when the flexible display panel 10 is a double-sided display, the reinforcing rib 10f may be provided on one surface or both surfaces of the flexible display panel 10.

As shown in fig. 4b, in some embodiments, the rib 10f is disposed on the surface of the flexible display screen 10, and the rib 10f is disposed on the non-light emitting side of the lamp bead 10c, in which case the projection of the rib 10f on the surface of the flexible display screen 10 is within the projection of the lamp bead 10 c. In other words, strengthening rib 10f overlaps the setting with lamp pearl 10c in the thickness direction of flexible display screen 10, and the width of strengthening rib 10f is not more than the width of lamp pearl 10 c. So, the projection of strengthening rib 10f can be located the projection of lamp pearl 10 c. Set up like this for strengthening rib 10f can overlap with lamp pearl 10c, on the one hand, and then in order to reduce 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 in order to promote flexible display screen 10's impression.

As shown in fig. 4c, in some embodiments, the reinforcing rib 10f is disposed on the surface of the flexible display screen 10, and the reinforcing rib 10f is disposed on the non-light emitting side of the lamp bead 10c, at this time, the reinforcing rib 10f and the lamp bead 10c are sequentially staggered in the winding and unwinding direction of the flexible display screen 10. Set up like this, position lamp pearl 10c can be kept away to strengthening rib 10f to guarantee flexible display screen 10's display effect.

As shown in fig. 5a, in some embodiments, the reinforcing rib 10f is embedded in the flexible display screen 10, and the reinforcing rib 10f is disposed on the light emitting side of the lamp bead 10c, at this time, the reinforcing rib 10f and the lamp bead 10c are sequentially staggered in the winding and unwinding directions of the flexible display screen 10. Specifically, the rib 10f is embedded in the package layer 10 d. Set up like this, position lamp pearl 10c can be kept away to strengthening rib 10f to guarantee flexible display screen 10's display effect. When the flexible display panel 10 is a dual display, the stiffener 10f may be embedded in both the package layers 10d on both sides of the flexible display panel 10 in the thickness direction, or the stiffener 10f may be embedded in only one of the package layers 10d on one side of the flexible display panel 10.

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

As shown in fig. 5c, in some embodiments, the reinforcing rib 10f is embedded in the flexible display screen 10, and the reinforcing rib 10f is disposed on the non-light emitting side of the lamp bead 10c, at this time, the projection of the reinforcing rib 10f on the surface of the flexible display screen 10 is in the projection of the lamp bead 10 c. In other words, the reinforcing ribs 10f and the lamp beads 10c are arranged in an overlapped mode in the thickness direction of the flexible display screen 10, and the width of the reinforcing ribs 10f is not larger than that of the lamp beads 10 c. Specifically, the reinforcing rib 10f is embedded 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 reinforcing rib 10f is embedded in the flexible display screen 10, and the reinforcing rib 10f is disposed on the non-light emitting side of the lamp bead 10c, at this time, the projection of the reinforcing rib 10f on the surface of the flexible display screen 10 is in the projection of the lamp bead 10 c. In other words, the reinforcing ribs 10f and the lamp beads 10c are arranged in an overlapped mode in the thickness direction of the flexible display screen 10, and the width of the reinforcing ribs 10f is not larger than that of the lamp beads 10 c. Specifically, the rib 10f is embedded 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, at this time, the two sides of the flexible display screen 10 are both provided with the reinforcing ribs 10f, and at this time, 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 embedded in the encapsulating layers 10d on both sides of the flexible display panel 10.

As shown in fig. 5f, in some embodiments, the flexible display 10 is a double-sided display, in which case, the two sides of the flexible display 10 and the flexible substrate 10a are provided with reinforcing ribs 10 f. Specifically, the reinforcing ribs 10f and the lamp beads 10c on the two 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 reinforcing ribs 10f in the flexible base layer 10a on the surface of the flexible display screen 10 is in the projection of the lamp beads 10 c.

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

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

In some embodiments, let the deformation force of the flexible display screen 10 be P ₁ The reinforcing rib 10f has a straightening force P ₂ Then, there are:

wherein E is ₂ >E ₁ ，P ₂ >P ₁ ；

Wherein f is a set deflection deformation amount, E ₁ Is the initial elastic modulus of the flexible display screen 10; i is ₁ Moment of inertia of the flexible display screen 10; l ₁ The length of the flexible display screen 10 along the axial direction of the reel 21; e ₂ The modulus of elasticity of the reinforcing rib 10 f; i is ₂ Moment of inertia of the reinforcing rib 10 f; l ₂ The length of the reinforcing bar in the axial direction of the 10f reel 21.

Specifically, please refer to fig. 3, after the flexible display 10 is curled, a section parallel to the axial direction of the scroll 21 is made on the flexible display 10, so as to obtain a section similar to a U shape, and the warpage of the two sides of the flexible display 10 can be substantially consistent by observing the section. Therefore, stress conditions of two side edges of the flexible display screen 10 can be obtained by only performing stress calculation on the warping of one side. Since the portion of the flexible display screen 10 closer to the side edge is more greatly warped and the portion closer to the center is less warped, the deformation condition is similar to the stressed model of the cantilever beam. Thus warping on the side facing the flexible display screen 10When the stress is calculated, the side can be regarded as a cantilever beam with a fixed single point, and then the formula is calculated according to the maximum deflection deformation of the cantilever beam:

the deformation force P generated by the flexible display screen 10 itself when the flexible display screen is deformed with the maximum deflection is calculated, and the deformation force can also be regarded as the external applied load driving the flexible display screen 10 to have the maximum warpage. Here, when calculating the moment of inertia of the flexible display screen 10, the cross section of the flexible display screen 10 may be regarded as a rectangle to calculate the moment of inertia of the flexible display screen 10 according to the moment of inertia of the rectangle. Specifically, the calculation formula of the rectangular moment of inertia is as follows:

in which b ₁ And h ₁ Respectively the width and height of the cross-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 known data, we can set a deflection deformation amount f to calculate the amount of the deformation force (i.e. P) generated when the flexible display screen is warped by the deformation amount f (i.e. deflection deformation) ₁ Value of (d). Specifically, after transformation, we can obtain the following formula (1):

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

Furthermore, as for the reinforcing rib 10f, half of the reinforcing rib 10f can be taken, and the half of the reinforcing rib 10f is also regarded 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, the following formula (2) can be obtained:

similarly, the moment of inertia of the reinforcing rib 10f can also be calculated according to a rectangular moment of inertia formula, which is as follows:

in which b ₂ And h ₂ Respectively the width and height of the section taken when calculating the moment of inertia of the reinforcing bar 10 f.

In the formula (2), P ₂ It can be understood that the external load is required when the reinforcing bar 10f is deformed by the deformation amount f. Thus, if P ₂ >P ₁ It means that the deformation force generated when the flexible display panel 10 is warped by the deformation amount f is smaller than the external applied load when the rib 10f is driven to warp by the deformation amount f. That is, the rib 10f is not warped 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 the smoothness of the flexible display screen 10 can be further ensured. In other words, when f ═ f _max When P is present ₂ >P ₁ The flexible display screen 10 will not warp. In which P is ₂ And P ₁ The larger the difference, the less likely the flexible display screen 10 will warp.

For the above reasons, in order to prevent the flexible display screen from warping, the display device is manufactured according to the formula (2) and the formula (3)Width of the reinforcing bars we set (i.e. b) ₂ ) Thickness of the reinforcing bar (i.e. h) ₂ ) And modulus of elasticity E of reinforcing rib ₂ The following conditions are satisfied:

(1)、E ₂ >E ₁ ；

(2)、P ₂ >P ₁ 。

among them, limit E ₂ >E ₁ The purpose is to ensure that the reinforcing ribs can provide enough support for the flexible display screen and avoid the oversize of the reinforcing ribs.

It can be understood that the specification material of only needing the strengthening rib satisfies above-mentioned two conditions, can provide enough support for the flexible display screen, avoids the flexible display screen to take place the warpage.

For example, if f is 1mm, and the material of the encapsulation layer 10d of the flexible display screen 10 is EVA, the flexible display screen 10 may be formed by a method such as a sputtering method

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 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 make the reinforcing rib 10f, b is set ₂ h ₂ 10mm × 2mm, then

E ₂ ＝24000Mpa；

I ₂ ＝80mm ⁴ ；

P ₂ ＝33kg；

Obviously, whether PC or FR4 is selected for making the reinforcing bar 10f, P is provided ₂ >P ₁ In other words, the ribs 10f made of PC and FR4 according to the above dimensions are enough to support the flexible display screen 10 made of EVA as the packaging material, and avoid warpage. Namely, PC and FR4 can be used as the material of the stiffener 10f of the flexible display screen 10.

It should be noted that the material and size of the reinforcing rib 10f can be adaptively selected according to the actual application scene and size of the flexible display screen 10, and the present application does not specifically limit the material and size except for meeting the above conditions.

For example, the material of the rib 10f can be as follows:

alternatively, E ₂ >3 Mpa. It is understood that setting the modulus of elasticity of the reinforcing ribs 10f to be greater than 3MPa can exclude materials that cannot be used to support the flexible display 10 to ensure that the reinforcing ribs 10f can be used to support most of the flexible display 10.

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

here, the minimum bending radius of the flexible display screen 10 refers to a bending radius of the flexible display screen 10 at the innermost circle when the flexible display screen 10 is wound on the reel 21, and for convenience of calculation, the outer diameter of the reel 21 may be used as the minimum bending radius of the flexible display screen 10.

It can be understood that the width of the reinforcing rib 10f is set to be not less than the distance between the lamp beads 10c and not more than half of the minimum bending radius of the flexible display screen 10, so that the influence of the reinforcing rib 10f on the curling performance of the flexible display screen 10 can be reduced on the basis of ensuring that the reinforcing rib 10f can provide enough supporting force for the flexible display screen 10.

In some embodiments, if the distance between adjacent reinforcing ribs 10f is g, there are:

it can be understood that the distance between the adjacent reinforcing ribs 10f is set to be not less than the distance between the beads 10c and not more than half of the minimum bending radius of the flexible display screen 10, so that the influence of the reinforcing ribs 10f on the curling performance of the flexible display screen 10 can be reduced on the basis of ensuring that the reinforcing ribs 10f can provide enough supporting force for the flexible display screen 10.

In some embodiments, 0.2mm ≦ w ≦ 30 cm. That is to say, the distance between adjacent lamp beads 10c in the winding and unwinding direction of the flexible display screen 10 is not less than 0.2mm, and not more than 30 cm. The distance 10f between the adjacent lamp beads can be designed adaptively according to the actual application scene and the actual design requirement of the flexible display screen 10, and the application does not specifically limit the distance.

Illustratively, w can take on a value of 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, 30 cm.

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

Illustratively, R can take the value of 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, 52cm, 56cm, 53cm, 58cm, 67cm, 62cm, 61cm, 67cm, 61cm, 67cm, 65cm, 67cm, 65cm, 6cm, 1cm, 3cm, 4cm, 20cm, 1cm, 20cm, 2cm, 18cm, 2cm, 18cm, 19cm, 2, 68cm, 69cm, 70cm, etc.

In some embodiments, let the thickness of the flexible substrate 10a of the flexible display screen 10 be t _F If the thickness of the reinforcing rib 10f is h, the following are provided:

h≥t _F 。

it can be understood that, the thickness of the reinforcing rib 10f is set to be not less than the thickness of the flexible base layer 10a, which helps to ensure that the reinforcing rib 10f can provide sufficient supporting force for the flexible display screen 10 on the one hand, and on the other hand, the width of the flexible display screen 10 is not too wide, so as to limit the size of the reinforcing rib 10f, and further ensure the display screen effect of the flexible display screen 10.

In some embodiments, 3um ≦ t _F Less than or equal to 300 um. That is, the thickness of the flexible base layer 10a is not less than 3um and not more than 300 um. The thickness of the flexible base layer 10a may be adaptively designed according to the actual application scenario and the actual design requirement of the flexible display screen 10, which is not specifically limited in the present application.

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

In some embodiments, let the total thickness of the flexible display screen 10 be t _t Then, there are:

h≤t _t 。

it can be understood that the thickness of strengthening rib 10f sets up to be not more than the gross thickness of flexible display screen 10, can make strengthening rib 10f bury underground in flexible display screen 10 on the one hand guaranteeing that strengthening rib 10f provides sufficient holding power basis for flexible display screen 10, and on the other hand then can restrict the thickness of strengthening rib 10f to when making strengthening rib 10f locate flexible display screen 10 surface, can not be too in influencing the screen impression and the display effect of flexible display screen 10.

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

Exemplary, the total thickness of the flexible display screen can be 9um, 10um, 11um, 12um, 13um, 14um, 15um, 16um, 17um, 18um, 19um, 20um, 21um, 22um, 23um, 24um, 25um, 26um, 27um, 28um, 29um, 30um, 31um, 32um, 33um, 34um, 35um, 36um, 37um, 38um, 39um, 40um, 41um, 42um, 43um, 44um, 45um, 46um, 47um, 48um, 49um, 50um, 51um, 52um, 53um, 54um, 55um, 56um, 57um, 58um, 59um, 60um, 61um, 62um, 63um, 64um, 65um, 66um, 67um, 68um, 69um, 70um, 80um, 90um, 100um, 200um, 300um, 400um, 500um, 600um, 1mm, 2mm, 5mm, 2mm, etc.

In some embodiments, the driving module 30 and the winding and unwinding assembly 20 are disposed on the same side of the flexible display screen 10. Specifically, in some embodiments, the driving module 30 may be configured to rotate and stop in synchronization with the spool 21, wherein the driving module 30 can rotate when the spool 21 rotates and the driving module 30 stops when the spool 21 stops rotating. Set up like this, take place to interfere with drive module 30 when can avoiding the rolling of flexible display screen 10, and then in order to realize the free rolling and the expansion of flexible display screen 10. While in other embodiments, drive module 30 may be configured to rotate relative to spool 21, in which case drive module 30 does not rotate with the rotation of 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.).

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

It is also worth noting that in some embodiments, when the roller 21 releases the flexible display 10, the flexible display 10 may be automatically unfolded by gravity or by a driving force. The traction force may be provided by a driving mechanism having a driving end, which may be connected to the driving module 30 or directly connected to the other end of the flexible display screen 10. The driving mechanism can be arranged to be an active mechanism, such as a motor, a cylinder, a hydraulic cylinder and the like, and can also be arranged to comprise a passive mechanism, such as a spring, a coil spring and the like.

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

Referring to fig. 2, fig. 6, fig. 7, fig. 8, and fig. 9, in some embodiments, an accommodating space 21a is disposed in the reel 21, a first opening 211a communicated with the accommodating space 21a is disposed on the reel 21, and the driving module 30 is disposed in the accommodating space 21a and electrically connected to the flexible display 10 through the first opening 211 a. That is, the driving module 30 is disposed in the reel 21, and is disposed such that the flexible display screen 10 and the driving module 30 can be prevented from interfering with each other, so that the reel 21 can be freely wound on the reel 21. In addition, the driving module 30 is arranged in the reel 21, so that the space is saved, and the complexity of the structure of the reel 21 can be reduced. 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 reel 21.

In some embodiments, the driving module 30 further includes a driving board 33 and a connecting board 34, the display driver IC32 and the data receiving module 31 are both disposed on the driving board 33, 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 the plurality of flat cables of the flexible display screen 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 driver IC is provided with a plurality of FPC (flexible Printed circuit) cables, and the plurality of FPC cables 11 are provided with conductive traces capable of transmitting current signals and voltage signals, so as to not only supply power to the pixel units on the flexible display screen 10, but also enable the pixel units to be lit with a set brightness and color. The flexible display panel 10 is electrically connected to the display driver IC32 through the FPC cable 11. It should be noted that, in some embodiments, the flexible display panel 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 be electrically connected to the display driver IC32 through a PCB, a wire harness, or the like.

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

Optionally, the length of the FPC cable 11 is 0.5mm to 30 cm. Preferably, the length of the PFC wiring is between 5mm and 20 cm. Illustratively, the FPC cable 11 may have a length of 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, 200 mm.

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

It should be noted that, since the number of the FPC lines 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 the FPC lines 11 is difficult to be reduced. Accordingly, if the driving board 33 is electrically connected to the flexible display screen 10, a corresponding number of interfaces need to be provided, which may make it difficult to reduce the size of the driving board 33, and further make the occupied space of the driving module 30 larger.

Based on above-mentioned reason, the technical scheme of this application sets up drive plate 33 to be connected through connecting plate 34 and flexible display screen 10 electricity, like this, can set up the length of connecting plate 34 into the width looks adaptation with flexible display screen 10, and is less relatively with the size setting of drive plate 33 simultaneously, so, can be on the basis of guaranteeing that drive module 30 and flexible display screen 10 are normally connected, reduce the occupation space of flexible display screen 10. That is, the above design has an advantage of reducing the space occupied by the driving module 30.

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

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

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

Optionally, the width of drive plate 33 is between 0.5cm and 20 cm. Preferably, the drive plate 33 is 1cm to 5cm wide. Illustratively, the drive plate 33 may have a width of 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, and the like.

Further, a connection port (not shown) is provided on the driving plate 33, and the connection port is used as an interface of the driving plate 33. The connecting port can be made of ceramic (such as alumina, zirconia and the like), metal (such as silver, copper alloy, aluminum alloy, stainless steel and the like), plastic (PU, PC, PMMA, silica gel, phenolic resin, epoxy resin and the like) or composite materials of the three materials, and the like, and can be made into a row-inserting mode.

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

Further, the scroll 21 includes a first cylinder 211 and a second cylinder 212, wherein the first cylinder 211 is connected to the flexible display screen 10, the second cylinder 212 is disposed in the first cylinder 211, the first cavity 21b is formed between the first cylinder 211 and the second cylinder 212, the first cylinder 211 is provided with a first opening 211a, the second cylinder 212 is provided with a second cavity 21c, the second cylinder 212 is further provided with a second opening 212a, 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 to the flexible display screen 10 through the first opening 211a and is connected to 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 is 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 allows external lines and the like to enter the second cavity 21c to be connected to the driving plate 33.

With the above structure, the drive plate 33 can be separated from the connection plate 34 in the radial direction of the spool 21, so that not only a sufficient space is provided for the long connection plate 34, but also a sufficient space is provided for the drive plate 33. In addition, the second cylinder 212 separates the driving plate 33 and the connecting plate 34, so that the structure of the reel 21 can be simplified, and the material cost and the assembly cost of the reel 21 can be reduced.

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

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

Specifically, the adapting structure 35 may be at least one of an adapting board and an adapting wire. In other words, the connection board 34 and the driving board 33 may be connected through a patch board (e.g., a printed circuit board or a flexible circuit board), a patch cord (e.g., a flexible wiring harness), or both.

It will be appreciated that the provision of the adapter structure 35 to drive the plates 33 and the connecting plates 34 enables the configuration of the drive modules 30 to be adapted to the configuration of the reel 21 to obtain a suitable mounting and the configuration of the drive modules 30 to be adapted. Of course, the design of the present application is not limited thereto, and in other embodiments, the connecting plate 34 may be directly connected to the driving plate 33 without the through-connection structure 35.

Further, the winding and unwinding assembly 20 further includes a driving member 22, 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 so as 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 drive the first cylinder 211 to rotate through the second cylinder 212.

Specifically, the driver 22 includes a motor that is provided at a distance from the drive 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 arrangement of the connecting plate 34, the driving plate 33 and the motor can be simultaneously disposed in the second cavity 21 c. Thus, the integration degree of the flexible screen assembly can be greatly improved, and the reduction of the volume of the flexible screen assembly is facilitated.

It will be appreciated that the first cylinder 211 is driven to rotate by a motor, and the motor can be controlled to achieve controllable rotation of the spool 21. For example, if the motor serves as a motor, the timing control, the quantitative control, and the like of the reel 21 can be realized by writing a specific program in the servo controller. In addition, the servo controller can be connected with a wireless transceiver to realize remote control.

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

Optionally, the outer diameter of the motor is between 1cm and 30 cm. Preferably, the outer diameter of the motor is between 2.5cm and 5 cm. 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, or the like.

Optionally, the motor has a length of between 1cm and 2000 cm. Preferably, the length of the motor is between 5cm and 100 cm. For example, the length of 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, and the like.

It should be understood that the torque, outer diameter and length of the motor can be adapted according 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 be configured to include a motor and a transmission assembly connected between the motor and the winding shaft 21, and the transmission assembly may be configured as a reduction transmission assembly, and the reduction transmission assembly can increase the output torque of the motor and reduce the rotation speed of the winding shaft 21. Illustratively, the reduction drive assembly may be a gear drive assembly, a belt drive assembly, a chain drive assembly, or a combination of any two or three of the above.

In some embodiments, the flexible screen assembly of the present application further includes a battery (not shown) electrically connected to the driving member 22 to supply power to the driving member 22, so that the flexible screen assembly can be used independently, thereby facilitating the extension of the application range of the flexible screen assembly. It should be understood that when the flexible screen assembly of the present application is used in a device (e.g., an electronic device) having a power source, the actuator 22 may be directly connected to the power source of the device.

Optionally, the battery is a disassembled 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 a utility power source, a mobile power source, a generator, etc. to enable the driver 22 to draw power from the device. The specification form of the plug can be designed adaptively 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 winding and unwinding assembly 20 further includes a fixing member 23, and the fixing member 23 is disposed between the winding shaft 21 and the driving member 22 to fix the driving member 22 to the winding shaft 21. The fixing member 23 may be a fastening member such as a screw, or a fastening member such as a buckle or a plug. Different fixing members 23 can be selected according to different actual products.

Alternatively, the fixing member 23 may be made of 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.

In some embodiments, the outer surface of the roller 21 is provided with a connection member 24, and the flexible display screen 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 10 to the reel 21. The adhesive tape can be a single-sided adhesive tape or a double-sided adhesive tape, and the material of the adhesive tape can be single-sided and double-sided adhesive materials such as acrylic adhesive, epoxy resin, PU adhesive, silica gel and the like. It can be understood that the flexible display screen 10 is fixed by means of bonding, which has the advantages of convenient bonding and difficult damage to the display screen.

Alternatively, the connecting member 24 may be configured as a clamping mechanism (not shown) to clamp the flexible display panel 10 by clamping, and specifically, the clamping mechanism includes a clamping portion and an elastic portion, and the elastic portion can provide an elastic driving force to the clamping portion, so that the clamping portion can clamp the flexible display panel 10. Alternatively, 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 can be understood that the flexible display screen 10 is fixed by clamping, which has the advantages of easy assembly and disassembly and easy maintenance.

It should be understood that the specific connection manner of the flexible display 10 and the roller 21 can be selected adaptively according to different actual products, and is not limited to a specific one.

In some embodiments, the flexible display screen 10 includes a display area 12 and a first stress releasing area 13, the display area 12 has a lamp bead 10f, the lamp bead 10f is electrically connected to the display driver IC32, the flexible display screen 10 displays a picture on the display area 12, one end of the first stress releasing area 13 is connected to the display area 12, and the other end is connected to the reel 21.

The first stress releasing area 13 is used to connect the display area 12 and the reel 21, except the display area 12. When the flexible display screen 10 is rolled, the first stress releasing area 13 is firstly rolled on the reel 21, and the display area 12 is rolled on the reel 21 after the first stress releasing area 13 is rolled. Because the pixel units are rigid structures, when the flexible display screen 10 is rolled, the pixel units near the scroll 21 are easy to press the conductive circuits due to too small bending radius, so that the conductive circuits are damaged, and normal display of the flexible display screen 10 is affected. And through this first stress release district 13 for flexible display screen 10 when lapping, can increase display area 12 bend radius, so, the pixel unit and the conducting wire of display area 12 can not extrude each other, and then can not cause the damage of pixel unit or conducting wire, help promoting flexible display screen 10's job stabilization nature, and prolong flexible display screen 10's life. In addition, the first stress releasing area 13 can also prevent the pixel units of the display area 12 from being in hard contact with 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, when the flexible display screen 10 is unfolded, the weight of the display area 12 and the driving module 30 is supported by the first stress relief area 13. Thus, the stress of the display area 12 can be reduced to avoid the pixel unit and the conductive circuit in the display area 12 from being subjected to too much/too long stress to cause deviation, thereby facilitating the improvement of the working stability of the flexible display screen 10 and prolonging the service life of the flexible display screen 10.

Optionally, the length of the display area 12 is less than or equal to the length of the reel 21. So, the unsettled condition appears in the time of can avoiding the rolling to promote flexible display screen 10's life.

Optionally, the width of the display area 12 is between 3cm and 100 m. Preferably, the width of the display area 12 is between 10cm and 20 m. Illustratively, the width of the display region 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, 10000 cm.

Optionally, the thickness of the display area 12 is between 0.1mm and 10 mm. Preferably, the thickness of the display area 12 is between 0.5mm and 7 mm. Illustratively, the thickness of the display region 12 may be 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, 10.0 mm.

In some embodiments, the length of the first stress relief zone 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 coincides with the width of the display region 12. By the arrangement, the screen consistency of the flexible display screen 10 can be kept, and the flexible display screen 10 is beneficial to improving the appearance. Since the width of the first stress releasing region 13 is consistent with the width of the display region 12, the width range of the first stress releasing region 13 can refer to the display region 12, and will not be described herein again.

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 kept, and the flexible display screen 10 is beneficial to improving the appearance. Since the thickness of the first stress releasing region 13 is consistent with the width of the display region 12, the thickness range of the first stress releasing region 13 can refer to the display region 12, and will not be described herein again.

In some embodiments, the flexible display screen 10 further includes a second stress relief region 14, the second stress relief region 14 being connected to the display region 12 at one end and to the weight structure 40 at the other end. That is, the display area 12 is connected to the weight structure 40 through the second stress relief area 14. Through setting up this second stress release district 14, can alleviate the stress of display area 12 and counter weight structure 40 junction, and then help promoting the job stabilization nature of flexible display screen 10 to the life of extension flexible display screen 10. In addition, the second stress relief area 14 can make the flexible display screen 10 more symmetrical, which helps to improve the appearance of the flexible display screen 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 coincides with the width of the display region 12. By the arrangement, the screen consistency of the flexible display screen 10 can be kept, and the flexible display screen 10 is beneficial to improving the appearance. Since the width of the second stress releasing region 14 is the same as the width of the display region 12, the width range of the second stress releasing region 14 can refer 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 kept, and the flexible display screen 10 is beneficial to improving the appearance. Since the thickness of the second stress release region 14 is consistent with the width of the display region 12, the thickness range of the second stress release region 14 can refer to the display region 12, and will not be described herein again.

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 means of the arrangement, the display area 12, the first stress release area 13 and the second stress release area 14 can be obtained by selectively arranging the conductive motor 10b and the lamp beads 10f on the same flexible base layer 10 a. Thus, the production cost for 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 area 13 and the second stress relief area 14 may be not integrally formed with the display area 12, but may be joined to each other by bonding or the like.

In some embodiments, the flexible screen assembly of the present application further includes a first housing 50 and a second housing 60, wherein the winding and unwinding assembly 20 and the driving module 30 are disposed on the first housing 50; the weight structure 40 is disposed on the second casing 60, and the first casing 50 and the second casing 60 can be mutually matched and butted. The first housing 50 can provide a protection and installation position for the winding and unwinding assembly 20 and the driving module 30, and the second housing 60 can provide a protection and installation position for the counterweight structure 40. In addition, the installation of the flexible screen assembly in a practical application scene can be facilitated by the arrangement of the first housing 50 and the second housing 60.

Specifically, when the flexible display screen 10 is completely rolled up, the first housing 50 and the second housing 60 can be butted against each other, wherein the butting includes a scheme of matching and locking the first housing 50 and the second housing 60 in a mutually clamping manner, and also includes a scheme of only splicing the first housing 50 and the second housing 60 but not locking each other. The first casing 50 and the second casing 60 are matched, so that 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, silicone, phenolic resin, epoxy resin, etc.), or a composite of the three. It should be understood that the first housing 50 can be adaptively sized according to the winding and unwinding assembly 20 and the driving module 30, and the second housing 60 can also be adaptively sized according to the size of the counterweight structure 40, which is not specifically limited in the present 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. Set up like this, can separate the winding mechanism and the drive unit of flexible display screen 10, reduce the complexity of flexible screen subassembly structure and circuit, be favorable to improving the stability of product to be convenient for the earlier stage production and the later stage maintenance of product.

The invention further provides electronic equipment which comprises a shell and the flexible screen assembly, wherein the specific structure of the flexible screen assembly refers to the embodiment, and the flexible screen assembly is arranged on the shell. Since the electronic device adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and details are not repeated herein.

Specifically, the electronic device includes, but is not limited to, a mobile phone, an indoor display, an outdoor display screen, a smart window curtain, and the like.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A flexible screen assembly, comprising:

a flexible display screen; and the number of the first and second groups,

2. The flexible screen assembly of claim 1, wherein the flexible display screen is configured to deform with a force P ₁ The orthopedic force of the reinforcing rib is P ₂ Then, there are:

wherein E is ₂ >E ₁ ，P ₂ >P ₁ ；

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

3. A flexible screen assembly according to claim 1 or 2, wherein the flexible display screen has a plurality of light beads; the distance between adjacent lamp beads in the winding and unwinding direction of the flexible display screen is w, and the minimum bending radius of the flexible display screen is R; if the width of the reinforcing rib is b, the following steps are provided:

4. a flexible screen assembly according to claim 1 or 2, wherein the flexible display screen comprises a flexible substrate layer having a thickness t _F And if the thickness of the reinforcing rib is h, the following steps are provided:

h≥t _F 。

5. the flexible screen assembly of claim 3, wherein the flexible display screen has a plurality of light beads;

6. the flexible screen assembly of claim 5,

w is more than or equal to 0.2mm and less than or equal to 30 cm; and/or the presence of a gas in the gas,

0.4mm≤R≤70cm。

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

8. The flexible screen assembly of claim 1, wherein the flexible display further comprises a background layer disposed on a non-emitting side of the bead, the background layer configured to provide a background color.

9. The flexible screen assembly of claim 1, further comprising a driving module, wherein the driving module comprises a display driver IC, the display driver IC is electrically connected to the flexible display screen, the driving module and the winding and unwinding assembly are disposed at a 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.

10. An electronic device, comprising:

a housing, and

the flexible screen assembly of any of claims 1 to 9, provided to the housing.