CN215987896U

CN215987896U - Flexible display module and flexible display device

Info

Publication number: CN215987896U
Application number: CN202122251998.0U
Authority: CN
Inventors: 张跃兴; 王瑞; 赵勇; 肖斌
Original assignee: Shenzhen TCL High-Tech Development Co Ltd
Current assignee: Shenzhen TCL High-Tech Development Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-03-08
Anticipated expiration: 2031-09-16

Abstract

The application discloses flexible display module assembly and flexible display device, flexible display module assembly is including the flexible screen, backing sheet and the bottom plate that stack gradually, the periphery of flexible screen with the periphery of bottom plate is together fixed, the flexible screen with form an accommodation space between the bottom plate, the backing sheet holding is in the accommodation space. The backing sheet holding among the flexible display module of this application is in the flexible screen with in the accommodation space between the bottom plate, make the backing sheet is not fixed laminating completely the surface of flexible screen flexible display module rolling in-process, but relative slip between backing sheet and the flexible screen to avoid producing the internal stress because of elastic modulus's difference between backing sheet and the flexible screen, thereby avoid flexible screen delaminating to damage.

Description

Flexible display module and flexible display device

Technical Field

The application relates to the technical field of display, especially, relate to a flexible display module assembly and include flexible display device of flexible display module assembly.

Background

In recent years, the technology of flexible display screens (flexible screens) is rapidly developed, and more new product application forms such as folding mobile phones, folding notebook computers, curling mobile phones and the like appear, so that the strong requirements of users on large-screen display and portability are met.

The key technical problems to be solved by using the flexible screen are flexible rolling and rigid supporting, the problems of flexible rolling and rigid supporting of the flexible screen are mainly solved by the existing products or technologies through a telescopic support, a hinge, a traction mechanism and the like, and although the methods can meet the telescopic requirements of the flexible screen, the methods have the defects of complex structure, large volume, no portability, high cost, difficult assembly and the like.

In order to solve the problems of flexible rolling and rigid supporting of the flexible screen, the rigid material can be directly attached to the flexible screen in the prior art, although the method can effectively solve the problems, due to the fact that the elastic modulus difference between the flexible screen and the rigid material is large, large internal stress can be generated between the flexible screen and the rigid material after the flexible screen is curled, and the flexible screen is pulled to crack under the action of the stress to be delaminated and damaged.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application provides a flexible display module, aims at improving the problem that the flexible screen among the current flexible display module is easy to come off the layer and damage.

The embodiment of the application realizes like this, a flexible display module assembly, including flexible screen, backing sheet and the bottom plate that stacks gradually, the periphery of flexible screen with the periphery of bottom plate is together fixed, the flexible screen with form an accommodation space between the bottom plate, the backing sheet holding is in the accommodation space.

Optionally, in some embodiments of the present application, the support sheet is a shape memory alloy sheet, a stainless steel sheet, or a fiberglass sheet; and/or

The bottom plate is a metal sheet, a PET sheet or a PC sheet; and/or

The bottom plate is a net-shaped metal sheet, the net-shaped metal sheet comprises a plurality of grids, and an elastic arm structure is formed between every two adjacent grids.

Optionally, in some embodiments of the present application, the supporting sheet has a fixed end and a free end far away from the fixed end, and the fixed end is fixedly connected to the flexible screen.

Optionally, in some embodiments of the present application, a length of the supporting sheet in the accommodating space in a direction from a fixed end of the supporting sheet to a free end of the supporting sheet is smaller than a length of the accommodating space in the same direction.

Optionally, in some embodiments of the present application, the fixed end of the supporting sheet is fixed to the flexible screen and the bottom plate by a fastener or a glue.

Optionally, in some embodiments of the present application, the periphery of the flexible screen and the periphery of the bottom plate are fixed together by a fastener, an adhesive material, or a fixing plate.

Optionally, in some embodiments of the present application, a difference between a length of the supporting sheet in the accommodating space in a direction from a fixed end of the supporting sheet to a free end of the supporting sheet and a length of the accommodating space in the same direction is greater than 0 and less than or equal to 1 mm.

Correspondingly, this application embodiment still provides a flexible display device, be in including casing and holding winding mechanism in the casing, flexible display device is still including the above-mentioned flexible display module assembly of right, the one end of flexible display module assembly is connected on the winding mechanism, the rotatable holding of winding mechanism is in the casing, be used for the rolling or expand flexible display module assembly.

Optionally, in some embodiments of the present application, an opening is disposed on the housing, and the flexible display module enters the interior of the housing through the opening or extends to the exterior of the housing.

Optionally, in some embodiments of the present application, the rolling mechanism includes a reel for rolling the flexible display module, and a driving mechanism for driving the reel to rotate.

Optionally, in some embodiments of the present application, the winding mechanism further includes two bearings fixed to opposite ends of the housing, the two ends of the winding shaft are respectively provided with an installation portion, and each installation portion is rotatably received in a bearing hole of the bearing.

Optionally, in some embodiments of the present application, the reel has a receiving cavity, and the driving mechanism is received in the receiving cavity.

The backing sheet holding in the flexible display module assembly of this application is in the flexible screen with in the accommodation space between the bottom plate, make the backing sheet is not fixed laminating completely the surface of flexible screen, so flexible display module assembly rolling in-process, the backing sheet with can the relative slip between the flexible screen to avoid producing the internal stress because of elastic modulus's difference between backing sheet and the flexible screen, thereby avoid flexible screen delaminating damage.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a perspective view of a flexible display module of a flexible display device according to an embodiment of the present disclosure in an unfolded state;

fig. 2 is an exploded view of the flexible display device shown in fig. 1;

FIG. 3 is an exploded view of the flexible display module shown in FIG. 2;

FIG. 4 is a schematic structural diagram of a base plate according to an embodiment of the present disclosure;

FIG. 5 is an enlarged view of section A of the base plate shown in FIG. 4;

fig. 6 is a front view of the flexible display device shown in fig. 1;

fig. 7 is a cross-sectional view of the flexible display device shown in fig. 6 along the direction a-a;

fig. 8 is a perspective view of the flexible display module of the flexible display device shown in fig. 1 in a rolled state;

fig. 9 is a cross-sectional view of the flexible display device shown in fig. 8 taken along the direction B-B.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the utility model, are given by way of illustration and explanation only, and are not intended to limit the scope of the utility model. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device. The term first is used merely as an indication and does not impose numerical requirements or an order of construction. Various embodiments of the utility model may exist in a range of forms; it is to be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the utility model; accordingly, the described range descriptions should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, it is contemplated that the description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the stated range, such as 1, 2, 3, 4, 5, and 6, as applicable regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any number (fractional or integer) recited within the indicated range.

Referring to fig. 1 and 3, an embodiment of the present invention provides a flexible display module 100, which includes a flexible screen 10, a supporting sheet 20, and a bottom plate 30 stacked in sequence.

The periphery of the flexible screen 10 and the periphery of the bottom plate 30 are fixed together, so that a gap-shaped accommodating space is formed between the flexible screen 10 and the bottom plate 30. The support sheet 20 is accommodated in the accommodating space.

The support sheet 20 is accommodated in the accommodating space between the flexible screen 10 and the bottom plate 30, and the support sheet 20 is not completely fixed and attached to the surface of the flexible screen 10, so that in the winding process of the flexible display module 100, the support sheet 20 and the flexible screen 10 can slide relatively, thereby preventing the support sheet 20 and the flexible screen 10 from generating internal stress due to the difference of elastic modulus, and further preventing the flexible screen 10 from delaminating and damaging.

The support sheet 20 can provide a support force to the flexible screen 10, and the support sheet 20 has good elasticity and can be bent at will under an external force. In some embodiments, support sheet 20 may be selected from, but is not limited to, a sheet of shape memory alloy, a sheet of stainless steel, a sheet of fiberglass, and the like.

In an embodiment, the supporting sheet 20 is a shape memory alloy sheet, at this time, the supporting sheet 20 has good elasticity, the supporting sheet 20 is in a flat plate shape at normal temperature, the supporting sheet 20 can deform, such as rolling, along with the flexible screen 10 and the bottom plate 30 under the action of an external force, and after the external force is removed, the supporting sheet 20 returns to the flat plate shape under the action of itself and drives the flexible screen 10 and the bottom plate 30 to deform similarly, so that the flexible screen 10 reaches a flat state. Thus, the support sheet 20 can be matched with the flexible screen 10 to realize flexible rolling, and can also be used for flattening and supporting the flexible screen 10 which is not rolled.

In a specific embodiment, the shape memory alloy sheet is a shape memory alloy steel sheet. It will be appreciated that in other embodiments the shape memory alloy sheet may be any shape memory alloy sheet known in the art for use in flexible screens.

The supporting plate 20 has a fixed end 21 and a free end 22 far from the fixed end 21. The fixed end 21 is fixedly connected with the flexible screen 10, and the free end 22 is not fixedly connected with the flexible screen 10. Thus, only the fixed end 21 of the support sheet 20 is fixed on the flexible screen 10, so that the support sheet 20 is not completely fixed and attached to the surface of the flexible screen 10, and in the winding process of the flexible display module 100, the support sheet 20 and the flexible screen 10 can slide relatively, thereby preventing the support sheet 20 and the flexible screen 10 from generating internal stress due to the difference of elastic modulus, and preventing the flexible screen 10 from being cracked and damaged by delamination.

In an embodiment, the length of the supporting sheet 20 in the accommodating space along the direction from the fixed end 21 to the free end 22 of the supporting sheet 20 is smaller than the length of the accommodating space in the same direction, so as to reserve a space in the accommodating space, and prevent the supporting sheet 20 from forming wrinkles in the accommodating space and affecting or even damaging the flexible screen 10 due to the fact that the supporting sheet 20 extends too long relative to the flexible screen 10 in the rolling process. In at least one embodiment, the difference between the length of the supporting sheet 20 in the accommodating space in the direction from the fixed end 21 to the free end 22 of the supporting sheet 20 and the length of the accommodating space in the same direction is greater than 0 and less than or equal to 1mm, so that the rigid support of the shape memory alloy 20 to the flexible screen 10 can be ensured, and a suitable sliding compensation length can be provided.

In one embodiment, the fixed end 21 of the supporting sheet 20 is fixed with the flexible screen 10 and the bottom plate 30 by a fastener or an adhesive material. It is understood that in other embodiments, the fixed end 21 of the support sheet 20 and the flexible screen 10 and the base plate 30 may be fixed together by any other conventionally used means.

The periphery of the flexible screen 10 and the periphery of the bottom plate 30 are fixed together by a fixing member 40. The fixing member 40 may be a fastening member, a rubber material, or a fixing plate. It will be appreciated that in other embodiments, the perimeter of the flexible screen 10 and the perimeter of the base plate 30 may also be secured together by any other conventionally used means.

It will be appreciated that the fasteners may be conventionally used screws or the like. The adhesive material can be adhesive, PET single-sided adhesive, PET double-sided adhesive and the like.

In one embodiment, the fixing plate has a U-shaped structure, and the fixing plate can be used for clamping and fixing the periphery of the flexible screen 10 and the periphery of the bottom plate 30 in the U-shaped structure.

The base plate 30 exhibits flexibility, and the base plate 30 can be arbitrarily bent by an external force. The elastic modulus of the bottom plate 30 is the same as or similar to that of the flexible screen 10, so as to avoid the flexible screen 10 from being cracked when the flexible display module 100 is curled. The base plate 30 may be selected from, but not limited to, a metal sheet and a resin sheet. The metal sheet may be selected from, but is not limited to, stainless steel sheet. The resin sheet may be selected from, but not limited to, a PET (polyethylene terephthalate) sheet, a PC (polycarbonate) sheet, and the like.

In an embodiment, the bottom plate 30 is a mesh metal sheet, and the mesh structure of the mesh metal sheet can improve the ductility of the bottom plate 30, provide an extension space for the bottom plate 30, so that the bottom plate 30 is easily curled and easily extended after being curled, thereby preventing the flexible display module 100 from pulling the flexible screen 10 after being rolled.

Referring to fig. 4-5, in one embodiment, the mesh-shaped metal sheet is an etched stainless steel sheet. The surface of the etched metal sheet has a micro-net structure. The micro-mesh structure comprises a plurality of elongated grids 31, and elastic arm structures 32 are formed between adjacent grids 31. The mesh 31 and the elastic arm structure 32 can improve the elasticity of the stainless steel sheet, so that the stainless steel sheet is easy to bend to avoid the flexible screen 10 from being cracked when the flexible display module 100 is curled.

It is to be understood that the shapes of flexible screen 10, backup sheet 20, and base plate 30 are not limiting. In at least one embodiment, flexible screen 10, support sheet 20, and base plate 30 are rectangular.

Referring to fig. 3, the flexible display module 100 further includes a protective film 50 attached to a surface of the flexible screen 10 adjacent to the supporting sheet 20. The protective film 50 is used to protect the flexible screen 10 from the support sheet 20. In one embodiment, the protective film 50 is a PET single-sided adhesive protective film. It is understood that in other embodiments, the protective film 50 may be any protective film known in the art for protecting flexible screens.

Referring to fig. 1-2 and fig. 6-7, an embodiment of the present invention further provides a flexible display device 200, which includes a housing 201, a rolling mechanism 202 accommodated in the housing 201, and the flexible display module 100. One end of the flexible display module 100 is connected to the winding mechanism 202. The rolling mechanism 202 is rotatably disposed in the housing 201, and is used for rolling or unfolding the flexible display module 100.

It can be understood that the fixed ends of the flexible screen 10, the supporting sheet 20 and the bottom plate 30 of the flexible display module 100 are connected to the rolling mechanism 202.

Referring to fig. 8 to 9, an opening 2010 is disposed on the housing 201, and the flexible display module 100 can enter the interior of the housing 201 or extend to the exterior of the housing 201 through the opening 2010.

Referring to fig. 7 and fig. 9, the rolling mechanism 202 includes a reel 2021 for rolling the flexible display module 100, and a driving mechanism 2022 for driving the reel 2021 to rotate. The driving mechanism 2022 is fixed to the housing 201, and is configured to drive the reel 2021 to rotate, so as to wind or unwind the flexible display module 100.

The reel 2021 is a hollow reel, in other words, the reel 2021 has a housing chamber 2020. The driving mechanism 2022 is accommodated in the accommodating cavity 2020. Therefore, the winding shaft 2021 can wind the flexible display module 100.

The flexible display device 200 further includes two bearings 203 respectively fixed at opposite ends inside the housing 201. Two ends of the reel 2021 are respectively provided with a cylindrical mounting portion 2023, and each mounting portion 203 is rotatably received in a bearing hole of a bearing 203, so that the reel 2021 is rotatably mounted inside the housing 201.

The flexible display device 200 further comprises at least one positioning element 204. The positioning element 204 has a positioning hole 2041 and at least one fixing hole 2042, and the positioning element 204 is fixed on the housing 201 through the fixing hole 2042 and a fastening element (not shown). It will be appreciated that the fasteners are conventionally used fasteners such as screws and the like. The driving mechanism 2022 has a positioning rod 2024. The mounting portion 2023 of the reel 2021 has a through hole 2025. The positioning rod 2024 passes through the through hole 2025 and the head portion is accommodated in the positioning hole 2041, so that the driving mechanism 2022 is fixedly mounted on the housing 201.

In one embodiment, the driving mechanism 2022 is an electric motor. It will be appreciated that in other embodiments, the drive mechanism 2022 may be a drive mechanism conventionally used to provide a driving force.

The flexible display device 200 further includes a main board 205 mounted in the housing 201. The main board 205 is electrically connected to the driving mechanism 2022 and the flexible screen 10, respectively. The main board 205 can control the driving mechanism 2022 to wind or unwind the flexible display module 100, and can also be used to control the flexible screen 10 to display.

Referring to fig. 1 and 9, when the flexible display module 100 of the flexible display device 200 needs to be unfolded, the driving mechanism 2022 is opened, the driving mechanism 2022 drives the reel 2021 to rotate along the first direction, so as to release the rolling of the flexible display module 100, and the flexible display module 100 slides along the opening 2010 and extends to the outside of the housing 201, after the flexible display module 100 extends to the outside of the housing 201, the flexible screen 10 is automatically flattened for use under the action of the supporting sheet 20 and the bottom plate 30, and when the area of the flexible display module 100 outside the housing 201 meets the use area requirement, the driving mechanism 2022 can be closed.

Referring to fig. 8 to 9, when the flexible display module 100 of the flexible display device 200 needs to be rolled up, the driving mechanism 2022 is opened, so that the driving mechanism 2022 drives the reel 2021 to rotate along a direction opposite to the first direction, so as to roll up the flexible display module 100, and the flexible display module 100 slides along the opening 2010 and enters the interior of the housing 201.

In the winding process of the flexible display module 100 of the flexible display device 200, because the elastic modulus of the flexible screen 10 and the elastic modulus of the memory alloy 20 are different, the support sheet 20 can slide relative to the flexible screen 10, and because only the fixed end 201 of the support sheet 20 is fixed with the flexible screen 10, the support sheet 20 and the flexible screen 10 cannot generate internal stress due to the difference of the elastic modulus, so that the flexible screen 10 is prevented from delaminating and being damaged.

The flexible display module and the flexible display device provided by the embodiment of the present application are described in detail above, and a specific example is applied to illustrate the principle and the embodiment of the present application, and the description of the embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a flexible display module assembly, includes flexible screen, backing sheet and the bottom plate that stacks gradually, its characterized in that: the periphery of the flexible screen is fixed with the periphery of the bottom plate, an accommodating space is formed between the flexible screen and the bottom plate, and the supporting sheet is accommodated in the accommodating space.

2. The flexible display module of claim 1, wherein: the support sheet is a shape memory alloy sheet, a stainless steel sheet or a glass fiber sheet; and/or

The bottom plate is a metal sheet, a PET sheet or a PC sheet; and/or

3. The flexible display module of claim 1, wherein: the support piece has a stiff end and keeps away from the free end of stiff end, the stiff end with flexible screen fixed connection.

4. The flexible display module of claim 3, wherein: the length of the supporting sheet in the containing space along the direction from the fixed end of the supporting sheet to the free end is smaller than the length of the containing space in the same direction; and/or

The fixed end of the supporting sheet is fixed with the flexible screen and the bottom plate through fasteners or rubber materials; and/or

The periphery of the flexible screen and the periphery of the bottom plate are fixed together through fasteners, rubber materials or fixing plates.

5. The flexible display module of claim 4, wherein: the difference value between the length of the supporting sheet in the direction from the fixed end of the supporting sheet to the free end in the accommodating space and the length of the accommodating space in the same direction is larger than 0 and smaller than or equal to 1 mm.

6. The utility model provides a flexible display device, includes the casing and the holding is in winding mechanism in the casing which characterized in that: the flexible display device further comprises the flexible display module set according to any one of claims 1 to 5, wherein one end of the flexible display module set is connected to the rolling mechanism, and the rolling mechanism is rotatably accommodated in the shell and used for rolling or unfolding the flexible display module set.

7. The flexible display device of claim 6, wherein: the shell is provided with an opening, and the flexible display module enters the interior of the shell or extends to the exterior of the shell through the opening.

8. The flexible display device of claim 6, wherein: the winding mechanism comprises a reel and a driving mechanism, wherein the reel is used for winding the flexible display module, and the driving mechanism is used for driving the reel to rotate.

9. The flexible display device of claim 8, wherein: the winding mechanism further comprises two bearings fixed at two opposite ends of the shell respectively, two ends of the reel are provided with an installation part respectively, and the rotatable accommodating part of each installation part is arranged in a bearing hole of each bearing.

10. The flexible display device of claim 8, wherein: the reel is provided with an accommodating cavity, and the driving mechanism is accommodated in the accommodating cavity.