CN114267259A

CN114267259A - Folding display device

Info

Publication number: CN114267259A
Application number: CN202210121100.4A
Authority: CN
Inventors: 张凯凯
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2021-04-28
Filing date: 2022-02-09
Publication date: 2022-04-01

Abstract

The application provides a folding display device, which comprises at least two mutually connected folding components, wherein each folding component is provided with a front surface, a back surface and end surfaces, the end surfaces are connected with the front surface and the back surface, and the end surface of one side of each folding component, which is close to the other folding component, is a splicing surface; the folding component is correspondingly provided with at least one protection component which is connected with the corresponding folding component; the folding display state has a first state and a second state; when the folding display device is in the second state, the protection component is contained in the folding component, and two splicing surfaces belonging to two adjacent folding components are spliced together; when the folding display device is in the first state, the protection component at least partially extends out of the folding component and covers at least part of the splicing surface. The folding display device is simple in structure, the splicing surfaces and the edges of the folding display device can be protected, and the screen is protected from being stretched or compressed additionally.

Description

Folding display device

The present disclosure claims priority to chinese patent publication filed on 28/04/2021 by the chinese patent office under the publication number 202110466346.0 entitled "folding screen," the entire contents of which are incorporated by reference into the present disclosure.

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of flexible display, in particular to a folding display device.

[ background of the invention ]

With the change of display screen technology, a lot of terminal equipment taking a bendable and bendable screen such as a flexible display device and a folding display device as a selling point appears on the market, so that the ever-increasing screen using requirements of users are met, more display possibilities can be developed, and more ideas are provided for visual creation. However, the appearance of the foldable display device also brings new technical problems, the foldable display device is often folded and unfolded by splicing two screens, and in the foldable display device, a spliced surface is often exposed and unprotected, and is easily damaged, so that the performance of the foldable display device is affected.

[ summary of the invention ]

In order to solve the above problems, the present application provides a foldable display device.

In a first aspect, the present application discloses a foldable display device, comprising:

the folding component is provided with a front surface, a back surface and end surfaces, the end surfaces are connected with the front surface and the back surface, and the end surface of one side of the folding component close to the other folding component is a splicing surface;

the folding component is correspondingly provided with at least one protection component which is connected with the corresponding folding component;

in the first state, the folding display device is in a folding state;

in the second state, the folding display device is in a flattening state;

the folding display device has a first state and a second state;

when the folding display device is in a second state, the protection component is accommodated in the folding component, and two splicing surfaces belonging to two adjacent folding components are spliced together;

when the folding display device is in the first state, the protection component at least partially extends out of the folding component and covers at least part of the splicing surface.

The folding display device disclosed by the embodiment of the application has a simple structure, can protect the splicing surface and the edge of the folding display device, and protects a screen from being additionally stretched or compressed.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described 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 schematic side view of a foldable display device provided in an embodiment of the present application in a second state;

FIG. 2 is a schematic side view of a foldable display device according to an embodiment of the present application in a first state;

fig. 3 is a schematic structural diagram of a folding member in a folding display device provided in an embodiment of the present application.

FIG. 4 is a force relationship diagram of two protection components when the foldable display device provided by the embodiment of the present application performs an unfolding motion or a folding motion;

fig. 5 is a longitudinal sectional view of a foldable display device according to an embodiment of the present application;

fig. 6 is a schematic end view of a foldable display device according to an embodiment of the present application;

FIG. 7 is a schematic end view of another foldable display device provided in an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating a structure of a motion slot in a foldable display device according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram illustrating a structure of a motion slot in another foldable display device according to an embodiment of the present application;

FIG. 10 is a schematic diagram illustrating a structure of a motion slot in another foldable display device according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a motion slot and a motion portion of another foldable display device according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a restoring assembly in a foldable display device according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a restoring assembly in another foldable display device according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a restoring assembly in another foldable display device according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of a restoring assembly in another foldable display device according to an embodiment of the present disclosure;

FIG. 16 is a diagram illustrating the relationship between the dimensions of a moving part and a moving slot in a foldable display device according to an embodiment of the present application;

fig. 17 is a force relationship diagram and a size relationship diagram of a folding display device provided in an embodiment of the present application when performing an unfolding movement or a folding movement;

fig. 18 is a graph showing the moment arm of a foldable display device according to an embodiment of the present disclosure as a function of the radius of curvature.

Reference numerals:

1-a folding member; 2-a rotating mechanism; 3-front side; 4-back side; 5-side; 6-end face; 7-splicing faces; 8-a protective component; 9-a display panel; 10-folding the frame; 11-a back plate; 12-a side wall; 13-a containment chamber; 14-an opening; 15-a motion part; 16-guard (arc shell); 17-a motion slot; 18-a guide groove; 19-a limit groove; 20-slide (semi-circular slide); 21-a support bar; 22-a recovery component; 23-a bottom surface; 24-cambered surface; 25-an arcuate outer surface; 26-an arcuate inner surface; 27-an extension housing; 28-a bonding unit; f-extrusion force; w1 — first width; w2 — second width; d-diameter; r-radius; s1 — first direction; s2 — second direction; o1-center of rotation; o2-center of curvature; an X-axis; l1-first straight line; l2-second straight line; p-contact point; a-moment arm; t1 — first thickness; t2 — second thickness; r0-radius of curvature; g1 — first distance; g2 — second distance; c1 — first length; c2-second length.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all 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.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe directions, positions, etc., these directions, positions, etc. should not be limited by these terms. These terms are only used to distinguish one direction, a position, and the like from another. For example, the first direction may also be referred to as a second direction, and similarly, the second direction may also be referred to as a first direction, without departing from the scope of the embodiments of the present application.

The embodiment of the application discloses a folding display device, which can overcome the defect that the splicing position of the folding display device in the first state is not protected enough in the existing product, and can be applied to bending and splicing application scenes of a rigid display screen or a flexible display screen.

Referring to fig. 1 and 2, fig. 1 is a schematic side view illustrating a foldable display device provided by an embodiment of the present application in a second state; fig. 2 is a schematic side view illustrating a foldable display device according to an embodiment of the present application in a first state.

The folding display device of the embodiment comprises at least two mutually connected folding parts 1, wherein the folding parts 1 form a splicing structure, and are connected together through a rotating mechanism 2 to realize the opening and closing of the folding display device. The rotating mechanism 2 may be a rotating shaft structure, a hinge structure, or the like, which can rotate one of the folding members 1 by 360 degrees relative to the other folding member 1, and in this embodiment, the rotating mechanism 2 is a hinge structure. The foldable display device of the present embodiment is suitable for an application scenario in which a plurality of foldable members 1 are sequentially spliced, for example, three consecutive foldable members 1 are sequentially connected together by a hinge structure and can be folded two by two, and for convenience of describing the technical solution of the present embodiment, the following describes the technical solution of the present embodiment with two foldable members 1, but does not mean to limit the number of foldable members 1 in the foldable display device of the present application.

In the foldable display device of the present embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of a folding member in the foldable display device provided in the embodiment of the present application. The folding member 1 has a front face 3, a rear face 4, two side faces 5 and two end faces 6, the front face 3 and the rear face 4 being arranged opposite and parallel to each other, the two side faces 5 being arranged opposite and parallel to each other, the two end faces 6 being arranged opposite and parallel to each other, the front face 3, the rear face 4, the two side faces 5 and the two end faces 6 together forming a hexahedron, preferably a cuboid. When the folder 1 is in the second state, the front surface 3 and the back surface 4 are parallel to a first plane in which a display panel for display is located. The present application is explained in the case where the front surface 3 and the back surface 4 are orthographically projected on a first plane as a rectangle (may be a parallelogram), and the projections of the front surface 3 and the back surface 4 are overlapped. The two side faces 5 and the two end faces 6 connect the front face 3 and the back face 4 by edges of the front face 3 and the back face 4, and two sides of the two side faces 5, which are respectively connected at two ends of one group of opposite sides of the front face 3, are respectively connected with two sides of the two end faces 6, which are connected at two ends of the other group of opposite sides of the front face 3 by grids. The end surface 6 of the folding component 1 close to one side of the other folding component 1 is a splicing surface 7. The foldable display device of the present embodiment has a first state in which the foldable display device is in a folded state and a second state in which the foldable display device is in a flattened state. The two adjacent folding components 1 can be unfolded from the first state to the second state and can be folded from the second state to the first state.

The front surface 3 or the back surface 4 may be used to support a display panel for displaying a picture, the two side surfaces 5 may serve as supports, and at least one of the two end surfaces 6 is a splicing surface 7 for splicing, in other words, the end surfaces of the adjacent folding members 1 are opposite or adjacent to each other. The rotating mechanism 2 connected with the folding component 1 is arranged at the junction of the back surface 4 and the splicing surface 7. In the embodiment with two folding members 1, the end surface 6 facing the adjacent folding member 1 is a splicing surface 7. In the embodiment with a greater number of folding elements 1 than two, both end faces 6 of the central folding element 1 serve as splicing faces 7, while the folding elements 1 at both ends only have the end faces 6 facing the adjacent central folding element 1 as splicing faces 7.

With continued reference to fig. 1 and 2, the foldable display device further comprises a protective member 8, the protective member 8 being attached to the corresponding foldable member 1. Optionally, at least one protection component 8 is correspondingly disposed on the folding component 1, and the protection component 8 may be connected to the folding component 1 through a rotating shaft, a sliding groove, or a fixing component. When the folding display device is in the second state, the protection component 8 is accommodated in the folding component 1, and the two splicing surfaces 7 belonging to two adjacent folding components 1 are spliced together; when the folding display device is in the first state, the protective component 8 at least partially extends out of the folding component 1 and covers at least part of the splicing surface 7.

It should be noted that the splicing of the two folding components 1 means that the two splicing surfaces 7 are in surface contact to connect the two front surfaces 3 to form a plane. The folding display device of this embodiment adopts the protection part 8 that can stretch out and draw back automatically along with opening and shutting of folding display device, when folding display device is not used, can protect folding display device's concatenation face 7 can not be impaired because of external factors, lead to influencing folding display device's display function.

In this embodiment, preferably, as shown in fig. 4, fig. 4 is a force relationship diagram between two protection components when the folding display device of this embodiment performs an unfolding movement or a folding movement.

In the embodiment of the present application, two adjacent folding members 1 can perform an unfolding motion from a first state to a second state, and can perform a folding motion from the second state to the first state. When the folded display device performs the unfolding movement, the adjacent two protection members 8 contact each other. When the folding display device is unfolded and moved, the protection components 8 can be in contact with each other, then along with the rotation of the folding components 1, in the rotating process, the included angle and the distance between the two splicing surfaces 7 are gradually reduced, because the protection components 8 are connected with the folding components 1, the folding components 1 can drive the protection components 8 to move when being unfolded and moved, at the moment, the two protection components 8 move towards opposite and mutually close directions, then the two protection components 8 can be mutually extruded, extrusion force F towards the opposite folding components 1 is respectively applied to each other, and the direction of the extrusion force F is shown in fig. 4. And because the protection component 8 is connected with the folding component 1, when the protection component 8 is extruded, the folding component 1 can generate a reaction force which is opposite to the direction of the extrusion force F (not necessarily opposite to the extrusion force F, but can be opposite to the extrusion force F with a certain included angle) to the protection component 8, and the expansion speed of the folding component 1 is controlled by the extrusion force F, so that the mutual collision force of the two splicing surfaces 7 during splicing is small, and the splicing surfaces 7 can be protected from being damaged after being spliced for a plurality of times after being used for a long time. When the folding display device carries out folding movement, the protective components 8 are always in contact, the pressing force F towards the opposite folding component 1 is still applied to each other, the folding speed of the folding component 1 is controlled through the pressing force F, so that the mutual collision force of the two back surfaces 4 during folding is small, and the protective back surfaces 4 still cannot be damaged greatly after being folded for a plurality of times in long-term use. In the process of unfolding the folding component 1, the folding component 1 can rotate at a constant speed by utilizing the mutual extrusion of the protection components 8, and the folding display device is unfolded at a constant speed until the folding display device is in a second state; when the folding display device is in the first state, the protection component 8 covers at least part of the area of the splicing surface 7, and it should be noted that the protection component 8 can cover a part of the area of the splicing surface 7 and also can cover the whole splicing surface 7 as long as the effect of protecting the splicing surface 7 can be achieved, and the size of the covered specific area is not limited. Therefore, the protection component 8 can protect the splicing surface 7 from being damaged, when the folding display device is attacked by external force, the protection component 8 can provide counter force to resist the attack of the external force, the splicing surface 7 is often damaged in advance, and only the protection component 8 needs to be detached for replacement during maintenance, so that the service life of the folding display device is effectively prolonged.

In the foldable display device of the present embodiment, as shown in fig. 1 and 2, the folding member 1 includes a display panel 9 and a folding frame 10, the display panel 9 is used for displaying a screen, and the folding frame 10 is used for supporting the display panel 9 and components for realizing the display of the display panel 9. Further, as shown in fig. 5, fig. 5 is a longitudinal sectional view of a foldable display device according to an embodiment of the present application. The foldable frame 10 includes a back plate 11 and a side wall 12 at an edge of the back plate 11, the display panel 9 is located at one side of the back plate 11, the side wall 12 extends along a side facing the display panel 9, and referring to fig. 1 to 5, the display panel 9 and the back plate 11 are respectively disposed at the front surface 3 and the back surface 4 of the foldable member 1, and the side wall 12 is disposed at the side surface 5 of the foldable member 1. Note that the display panel 9 may be integrally formed on the front surface 3, or may be fixed to the front surface 3 by a fixing member, an adhesive, or the like, and similarly, the back plate 11 of the folding frame 10 may be integrally formed on the back surface 4, or may be fixed to the back surface 4 by a fixing member, an adhesive, or the like, and the side wall 12 may be integrally formed on the side surface 5, or may be fixed to the side surface 5 by a fixing member, an adhesive, or the like.

The folding frame 10 has a containing cavity 13 between the display panel 9 and the back panel 11, and optionally, the containing cavity may be a groove structure that is recessed from the splicing surface to a part inside the folding component; alternatively, the receiving cavity may be a tubular structure extending through both end surfaces. Referring to fig. 1 to 5, when the foldable display device is in the second state, the protection member 8 is accommodated in the accommodating cavity 13. When the display panels 9 are arranged on the front face 3 of the folding component 1, if the folding display device is in the second state, the two adjacent display panels 9 can be seamlessly spliced, so that a better viewing experience is provided for a user, the seamless splicing means that when the two display panels 9 are spliced together to jointly display the same content, the two display panels 9 do not have height drop, the connected splicing part is not easy to be observed by the user, but when the folding display device is in the first state, the display panels 9 are exposed outside and are easy to be damaged during storage or carrying. When the display panel 9 is arranged on the back surface 4 of the folding part 1, if the folding display device is in the first state, the display panel 9 is protected between the two folding parts 1 and cannot be damaged due to storage or carrying, but when the folding display device is in the second state, the rotating mechanism 2 connected between the two folding parts 1 can enable a splicing seam or a gap to be left between the two display panels 9, the user's viewing experience is poor, if the splicing seam or the gap is to be eliminated, other devices capable of splicing the display panels 9 seamlessly are required to be designed, extra design cost and equipment cost are required to be added, and compared with the case that the display panel 9 is arranged on the front surface 3, the display device has no advantages.

In the present description, the display panel 9 is provided on the front surface 3 of the folding member 1 as an example. Between the front surface 3 and the back surface 4 of the folding member 1, that is, between the display panel 9 and the back panel 11, a receiving cavity 13 is formed to provide a space for the telescopic movement of the protection member 8, the receiving cavity 13 is defined by the front surface 3, the back surface 4 and two side surfaces 5 of the folding member 1, in two end surfaces 6 of the folding member 1, the splicing surface 7 is an open surface (see fig. 6, fig. 6 is a schematic end surface view of a foldable display device provided in the embodiment of the present application) or an end surface provided with a plurality of openings 14 (see fig. 7, fig. 7 is a schematic end surface view of another foldable display device provided in the embodiment of the present application), the other end surface 6 can be an open surface or a closed surface, the open surface refers to a surface having a groove structure, when the folding member 1 is in the first state, the receiving cavity 13 for receiving the protection member 8 can be seen, by closed surface is meant a surface without openings, only the end surface 6 being visible when the folding member 1 is in the first state. Along the extension direction of the splicing surface 7, when the protection component 8 is a whole long strip-shaped structure, the splicing surface 7 is designed to be an open surface, it should be noted that the splicing surface 7 is a long strip-shaped surface extending along the splicing seam, and the extension direction, that is, the splicing seam between the two folding components 1 is in the surface direction perpendicular to the display panel 9 when the splicing surface 7 is in the second state along the folding display device, so that the long strip-shaped structure refers to the protection component 8 of the integrated structure extending in the direction from one side surface 5 to the other side surface 5. When the protection component 8 is a plurality of protection components 8 sequentially arranged on the splicing surface 7, the splicing surface 7 can be designed to be an open surface or an end surface 6 provided with a plurality of openings 14, and the latter (the structure shown in fig. 7) is a preferred scheme, and has the advantage of providing structural strength for the splicing surface 7 when the folding display device is in the second state.

As shown in fig. 8, fig. 8 is a schematic structural diagram of a moving slot in a foldable display device according to an embodiment of the present application, and the protection member 8 includes a moving portion 15 and a protection portion 16. Referring to fig. 1 to 3 and 8, the moving portion 15 is connected to the folding member 1, and the protecting portion 16 is connected to the moving portion 15. When the folding display device carries out folding movement, the moving part 15 drives the protection part 16 to extend out of the folding component 1 from the inner part of the folding component 1 to the splicing surface 7; when the folding display device performs unfolding movement, the two protection parts 16 belonging to two adjacent folding components 1 mutually press to drive the moving part 15 to retract into the folding components 1 from the splicing surface 7 towards the interior of the folding components 1.

In this embodiment, referring to fig. 5, 6 and 8, the protection portion 16 serves to protect the splicing surface 7, and the moving portion 15 serves to drive the protection portion 16 to extend out of and retract into the accommodating cavity 13. One end of the moving part 15 extends into the accommodating cavity 13 and is connected to the inner side of the side wall 12 of the folding frame 10, the moving part 15 is not connected to the inner side of the display panel 9 or the back plate 11, so that the moving part 15 does not influence the normal work of the display panel 9 and the back plate 11, and the other end of the moving part 15 is connected to the inner side of the protecting part 16 facing the accommodating cavity 13, and is linked with the protecting part 16. When the foldable display device performs the folding movement or the unfolding movement, the outward movement of the moving portion 15 may be one or more combinations of linear movement, curvilinear movement, polygonal movement, spiral movement, spatial three-dimensional movement, and the like, as long as the protection portion 16 can be taken out of or back into the accommodating cavity 13, of course, the linear movement of the moving portion 15 is a preferred embodiment of the present embodiment, and the outward movement refers to an extending movement from the inside of the accommodating cavity 13 to the outside of the accommodating cavity 13. The protection part 16 moves to extend or retract the accommodating cavity 13 along with the moving part 15, but the movement of the protection part 16 can also be a rotating movement rotating around the joint of the moving part 15 and the folding frame 10, and the rotating movement of the protection part 16 can make full use of the space inside the folding frame 10, so that the accommodating cavity 13 is smaller, and the electronic device on the back plate 11 has a larger installation space.

Fig. 9 is a schematic structural view of a moving slot in another foldable display device according to an embodiment of the present application, as shown in fig. 8, 9 and 10; fig. 10 is a schematic structural diagram of a motion slot in another foldable display device provided in an embodiment of the present application. The folding component 1 is provided with a moving groove 17, the moving groove 17 is a linear structure in fig. 8, the moving groove 17 is an arc structure in fig. 9, the moving groove 17 is a combination of a linear structure and an arc structure in fig. 10, the moving groove 17 of the linear structure is a straight line groove body which is arranged in the folding component 1 and close to the splicing surface 7, the straight line groove body can be perpendicular to the splicing surface 7 or not, but the size of an included angle between the straight line groove body and the splicing surface 7 cannot affect the telescopic motion of the protection component 8, the moving groove 17 of the arc structure is an arc groove body which is arranged in the folding component 1 and close to the splicing surface 7, and the arc groove body can guide the protection component 8 to do rotary motion while doing telescopic motion. In fig. 8, the moving portion 15 slides along the moving slot 17 to drive the protecting portion 16 to move, and when the moving portion 15 slides to one end of the moving slot 17 close to the splicing surface 7, the moving portion 15 rotates in the moving slot 17 to drive the protecting portion 16 to move. In fig. 9, the moving portion 15 rotates along the moving groove 17 to move the protecting portion 16, so that the protecting portion 16 completes rotation while telescoping. In fig. 10, the moving portion 15 slides along the linear section of the moving slot 17 to drive the protecting portion 16 to move, and then rotates along the arc section of the moving slot 17 to drive the protecting portion 16 to move. The moving groove 17 of fig. 8 to 10 is configured to guide the moving portion 15 to extend and retract and rotate the protecting portion 16. In contrast, the moving groove 17 and the moving part 15 of the linear structure shown in fig. 8 move linearly and then rotate, so that the smoothness and the use experience are better in the actual use process.

As shown in fig. 11, fig. 11 is a schematic structural diagram of a moving slot and a moving portion in another foldable display device provided in the embodiments of the present application. The moving slot 17 shown in fig. 11 has a guide slot 18 and a limit slot 19 communicating with each other, and the limit slot 19 is located at one end of the guide slot 18 near the splicing face 7. The guide slot 18 extends in a first direction S1, the first direction S1 being parallel to the front face 3 of the folding member 1 and directed towards the splicing face 7; the stop groove 19 extends in a second direction S2, the second direction S2 being parallel to the splicing face 7 and directed towards the front face 3 of the folding member 1. The guide groove 18 and the limit groove 19 together define the motion track of the motion part 15, so that the motion part 15 firstly performs linear motion in the guide groove 18 and then performs rotary motion in the limit groove 19. The moving portion 15 includes a sliding member 20 and a support rod 21, the support rod 21 connects the sliding member 20 and the protecting portion 16, the sliding member 20 moves the protecting portion 16 by the support rod 21, and the sliding member 20 extends perpendicular to the first direction S1 and the second direction S2. The sliding part 20 is connected to the folding component 1 through the restoring component 22, the restoring component 22 applies a force to the sliding part 20, the force is directed to the splicing surface 7, the restoring component 22 drives the sliding part 20 to slide along the guide groove 18 to drive the protection part 16 to move, and when the folding display device is in the first state, the restoring component 22 limits the sliding part 20 in the limiting groove 19; the return assembly 22 is one of a spring, a pull member, or a conveyor belt. The restoring component 22 always applies a pushing force towards the splicing surface 7 to the sliding part 20, even if the sliding part 20 is limited in the limiting groove 19, the restoring component 22 still applies the pushing force to the sliding part 20 to prop the sliding part against the inner wall of the limiting groove 19, when the folding display device carries out folding movement, the pushing force of the restoring component 22 controls the sliding part 20 to slide and extend out in the guide groove 18, and when the folding display device carries out unfolding movement, the pushing force of the restoring component 22 controls the sliding part 20 to slide and retract at a constant speed or at a reduced speed. The pushing force of the restoring member 22 enables the protecting portion 16 to always maintain the pressing force to the other protecting portion 16 during the folding movement or the unfolding movement of the folding display device, thereby enabling to control the expansion and contraction speeds of the two protecting portions 16. As shown in fig. 11 to 14, fig. 12 is a schematic structural diagram of a restoring assembly in a foldable display device according to an embodiment of the present application; FIG. 13 is a schematic structural diagram of a restoring assembly in another foldable display device according to an embodiment of the present disclosure; FIG. 14 is a schematic structural diagram of a restoring assembly in another foldable display device according to an embodiment of the present disclosure; fig. 15 is a schematic structural diagram of a restoring assembly in another foldable display device according to an embodiment of the present disclosure. The return assembly 22 may be configured as a spring as shown in fig. 12, as a lever controlled by a spring to transmit force through a lever hinged at one end as shown in fig. 13, as a rotating spring as shown in fig. 14 to provide torque directly on the support rod 21, or as a belt as shown in fig. 15.

Preferably, referring to fig. 16, fig. 16 is a size relationship diagram of a moving part and a moving slot in a foldable display device provided by an embodiment of the present application. In a first cross-section shown in fig. 16, the slide 20 is a semi-circular slide 20. The first section is a cross section of the folded part 1 in a direction from the front side 3 to the back side 4 and perpendicular to the splicing surface 7. In the second direction S2, the guide groove 18 has a first width W1, the stopper groove 19 has a first length C1, in the first direction S1, the stopper groove 19 has a second width W2, the diameter D of the semicircular slide 20 is equal to the first length C1, and the radius r of the semicircular slide 20, the first width W1, and the second width W2 are equal. Thus, the slider 20 can keep linear movement when sliding in the guide groove 18, and movement in the first direction S1 does not occur, and when being restricted by the restriction groove 19, the slider 20 is engaged and fixed by the restriction groove 19, and displacement does not occur.

As shown in fig. 16, during the folding movement of the folding display device, the semicircular sliding seat 20 firstly slides along the first direction S1 to be attached to the inner wall of the guide slot 18, and then rotates around the boundary between the guide slot 18 and the limiting slot 19 as the rotation center O1, so that the semicircular sliding seat 20 rotates from being attached to the inner wall of the guide slot 18 to being attached to the inner wall of the limiting slot 19; during the unfolding movement of the foldable display device, the bottom surface 23 rotates around the rotation center O1, so that the semicircular slide seat 20 rotates from the joint with the inner wall of the limiting groove 19 to the joint with the inner wall of the guide groove 18, and then slides along the first direction S1 to the joint with the inner wall of the guide groove 18. When the semicircular slide seat 20 is installed in the guide groove 18, the bottom surface 23 of the semicircular slide seat 20 is attached to the surface of the guide groove 18 close to the front surface 3, and the arc surface 24 of the semicircular slide seat 20 is attached to the surface of the guide groove 18 close to the back surface 4, so that when the semicircular slide seat 20 slides to the limiting groove 19, the arc surface 24 of the semicircular slide seat 20 can make a circular motion around the rotation center O1, and finally, the function of driving the protection part 16 to rotate is realized.

In the folding display device of the present embodiment, referring to fig. 17, fig. 17 is a force relationship diagram and a size relationship diagram of the folding display device provided in the embodiment of the present application when performing an unfolding motion or a folding motion. The protecting portions 16 are arc-shaped shells 16, the arc-shaped shells 16 are provided with arc-shaped outer surfaces 25 and arc-shaped inner surfaces 26, and the two protecting portions 16 rotate around respective rotation centers O1 along the respective arc-shaped outer surfaces 25; two adjacent folding components 1 are connected through a rotating mechanism 2 and carry out folding movement or unfolding movement around an axis X of the rotating mechanism 2; the connecting line of the rotation centers O1 of two adjacent protecting parts 16 is located on the first straight line L1, and the contact point P where two adjacent protecting parts 16 are pressed against each other is located on the first straight line L1; the line connecting the centers of curvature O2 of the arc-shaped inner surfaces 26 of the adjacent two protector portions 16 is located on a second straight line L2; the first line L1 is parallel to the second line L2, and the second line L2 is located between the first line L1 and the axis X. Referring to fig. 5 and 17, during the folding or unfolding movement of the foldable display device, the pressing force F applied between the two protection portions 16 is in a direction from the respective curvature centers O2 to the contact point P, and the distance between the first straight line L1 where the pressing force F is located and the second straight line L2 where the rotation center O1 is located is a moment arm a of the pressing force F, so that the pressing force F can cause the semicircular slide seat 20 to rotate the protection portions 16 into the accommodating cavity 13 because the moment arm a is located at the inner side of the rotation center O1 close to the accommodating cavity 13. The protection part 16 is arranged to the arc-shaped shell 16, so that the protection part 8 is in an arc shape, which can enable the folding part 1 of the folding display device to be buffered by the protection part 8 under various folding degrees, and the shape of the protection part 8 is smooth, and the problem of collision or blocking and bending prevention of the folding part 1 is avoided while buffering.

As shown in fig. 17, in one folding member 1: a first thickness of the protecting portion 16 along a radial direction thereof is T1, a radius of curvature of the arc-shaped inner surface 26 of the protecting portion 16 is R0, a first distance between the rotation center O1 of the protecting portion 16 and the splice surface 7 of the folding member 1 is G1, a second distance between the rotation center O1 of the protecting portion 16 and the front surface 3 of the folding member 1 is G2, and a second thickness of the folding member 1 along a second direction S2 is T2, which satisfy:

the first formula:

and a second formula:

when the moment arm a of the contact point P relative to the rotation center O1 is the largest, the value of N ranges from 0.51 to 0.52, and the radial direction of the protector 16 is from the curvature center O2 of the protector 16 to the arc-shaped inner surface 26 of the protector 16 along the radius of the protector 16. When the moment arm a is greater than or equal to 95% of the maximum value of the moment arm, the value range of N is 0.34-0.75, and when the moment arm a is greater than or equal to 90% of the maximum value of the moment arm, the value range of N is 0.28-0.87. Referring to fig. 18, fig. 18 is a graph showing the moment arm of a foldable display device according to an embodiment of the present disclosure along with the change of the radius of curvature, when the value of the moment arm a is the largest, the moment arm a is easier to provide a larger torque to the pressing force F, and when only the first distance G1 is varied while the parameters are fixed, it can be known that the smaller the first distance G1 is, the larger the moment arm a is; the smaller the second distance G2, the larger the moment arm a, when only the second distance G2 is varied. Therefore, the moment arm a can be adjusted to the maximum value by adjusting the positions of the rotation center O1 and the curvature center O2, and the second formula is the value of the curvature radius R0 of the protection part 16 when the moment arm a is at the maximum value, so as to be beneficial to better provide the extrusion force F for the two protection parts 16, and ensure that the protection parts 16 rotate more smoothly.

Further, with continued reference to fig. 17, the protection portion 16 further includes an extension housing 27, the extension housing 27 extends from the outer end of the arc-shaped housing 16, and the extension housing 27 is linear; when the folding display device is in the second state, one end of the arc-shaped shell 16 close to the adjacent folding part 1 is an outer end; when the folding display device is in the first state, the extension housing 27 rotates to the side of the front face 3 of the folding member 1 far away from the back face 4 of the folding member 1 and clings to the front face 3 of the folding member 1; the second distance between the rotation center O1 of the protection part 16 and the front face 3 of the folding member 1 is G2, the first distance between the rotation center O1 of the protection part 16 and the splicing face 7 of the folding member 1 is G1, and the second length of the extension case 27 is C2, which satisfies:

the third formula: c2 < 2G1, and a fourth formula: g2 > C2-G1. The third formula is designed to allow the extension case 27 to normally rotate without being caught, and the fourth formula is designed to allow the protection part 16 to be normally received when retracted, and at this time, the protection part 16 moves horizontally. The extension housing 27 can protect the edge of the display panel 9 close to the splicing face 7 from being damaged, thereby prolonging the service life of the display panel 9.

As shown in fig. 6, in the foldable display device of the present embodiment, the splicing surface 7 is provided with a plurality of bonding units 28, and when the foldable display device is in the second state, the two splicing surfaces 7 belonging to two adjacent foldable members 1 are spliced together by the plurality of bonding units 28. The gluing unit 28 is preferably a magnetic sticker which makes the splicing of the splicing surfaces 7 more secure and stable when the two folding parts 1 are spliced together. Of course, the adhesive means 28 may be provided on the back surface 4 of the foldable member 1, preferably by magnetic attachment, so that the foldable display device can maintain a stable first state even in the first state. It should be noted that the bonding unit 28 shown in fig. 6 is not limited to an embodiment of magnetic tape, and other embodiments such as magic tape, adhesive, and buckle structure may be used for the bonding unit 28, as long as the effect that the splicing surfaces 7 can be firmly spliced together and cannot be easily separated when the folding component 1 is in the second state can be achieved.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A foldable display device, comprising:

the foldable parts are connected with each other, each foldable part is provided with a front surface, a back surface and end surfaces, the end surfaces are connected with the front surfaces and the back surfaces, and the end surfaces of the foldable parts, close to one side of the other foldable part, are splicing surfaces;

the folding component is correspondingly provided with at least one protection component which is connected to the corresponding folding component;

the folding display device has a first state and a second state;

in the first state, the foldable display device is in a folded state;

in the second state, the foldable display device is in a flattened state;

when the folding display device is in the second state, the protection component is accommodated in the folding component, and the two splicing surfaces belonging to two adjacent folding components are spliced together;

when the folding display device is in the first state, the protective component at least partially extends out of the folding component and covers at least part of the splicing surface.

2. The foldable display device of claim 1, wherein two adjacent foldable members are capable of being unfolded from the first state to the second state and folded from the second state to the first state;

when the folded display device performs the unfolding movement, the adjacent two protection parts are in contact with each other.

3. The folding display device of claim 2, wherein said protection member includes a moving portion and a protection portion, said moving portion being connected to said folding member, said protection portion being connected to said moving portion;

when the folding display device carries out the folding movement, the moving part drives the protection part to extend out of the folding part from the inside of the folding part to the splicing surface;

when the folding display device carries out the unfolding movement, the two protection parts belonging to the two adjacent folding components mutually press to drive the movement part to retract into the folding components from the splicing surface to the interior of the folding components.

4. The foldable display device of claim 3, wherein the foldable member has a moving slot, and the moving part slides along the moving slot to move the protection part; and/or the moving part rotates along the moving groove to drive the protection part to move.

5. The folding display device of claim 4, wherein said moving groove has a guide groove and a stopper groove communicating with each other;

the guide groove extends along a first direction, and the first direction is parallel to the front surface of the folding component and points to the splicing surface;

the limiting groove extends along a second direction, and the second direction is parallel to the splicing surface and points to the front surface of the folding component;

the moving part comprises a sliding part, the sliding part is connected to the folding part through a restoring component, the restoring component applies a force pointing to the splicing surface to the sliding part, the restoring component drives the sliding part to slide along the guide groove so as to drive the protection part to move, and when the folding display device is in the first state, the restoring component limits the sliding part in the limit groove; the return assembly is one of a spring, a pull rod or a conveyor belt.

6. The folding display device of claim 5, wherein in a first cross-section, said slide is a semi-circular slide; the first section is a cross section which is perpendicular to the splicing surface and is in the direction from the front surface to the back surface in the folding component;

in the second direction, the guide groove has a first width, the limiting groove has a first length, in the first direction, the limiting groove has a second width, the diameter of the semicircular sliding seat is equal to the first length, and the radius of the semicircular sliding seat, the first width and the second width are equal.

7. The folding display device of claim 6,

in the folding movement process of the folding display device, the semicircular slide seat firstly slides along the first direction and is attached to the inner wall of the guide groove, and then rotates by taking the junction of the guide groove and the limiting groove as a rotation center, so that the semicircular slide seat rotates from being attached to the inner wall of the guide groove to being attached to the inner wall of the limiting groove;

in the unfolding movement process of the folding display device, the bottom surface firstly rotates around the rotating center, so that the semicircular sliding seat rotates from being attached to the inner wall of the limiting groove to being attached to the inner wall of the guide groove, and then is attached to the inner wall of the guide groove in the first direction to slide.

8. The folding display device of claim 5, wherein said moving portion further comprises a support bar connecting said sliding member and said protecting portion; the sliding piece drives the protection part to move through the supporting rod.

9. The foldable display device of claim 3, wherein said protecting portions are arc-shaped housings having an arc-shaped outer surface and an arc-shaped inner surface, and said two protecting portions are relatively rotated around the respective rotation centers along the respective arc-shaped outer surfaces;

two adjacent folding components are connected through a rotating mechanism and carry out folding movement or unfolding movement around the axis of the rotating mechanism;

the connecting line of the rotation centers of two adjacent protection parts is positioned on a first straight line, and the mutual extrusion contact point of the two adjacent protection parts is positioned on the first straight line;

the connecting line of the curvature centers of the arc-shaped inner surfaces of two adjacent protection parts is positioned on a second straight line;

the first line is parallel to the second line, the second line being between the first line and the axis.

10. The folding display device of claim 9, wherein in one of said folding members: the first thickness of protection portion along its radial direction is T1, the radius of curvature of the arc inner surface of protection portion is R0, the first distance between the centre of rotation of protection portion and the concatenation face of folded component is G1, the second distance between the centre of rotation of protection portion and the front of folded component is G2, the folded component is along second thickness in the second direction is T2, satisfies: the first formula:

and a second formula:

and when the force arm of the contact point relative to the rotation center is maximum, the value range of N is 0.51-0.52.

11. The foldable display device of claim 9, wherein the protective portion further comprises an extension housing extending from an outer end of the arc housing; when the folding display device is in the second state, one end of the arc-shaped shell close to the adjacent folding part is an outer end;

when the folding display device is in the first state, the extension section shell rotates to the side, away from the back of the folding part, of the front of the folding part and clings to the front of the folding part;

the second distance between the rotation center of the protection part and the front face of the folding component is G2, the first distance between the rotation center of the protection part and the splicing face of the folding component is G1, and the second length of the extension casing is C2, so that: the third formula: c2 < 2G1, and a fourth formula: g2 > C2-G1.

12. The foldable display device of claim 1, wherein a plurality of bonding units are disposed on the joint surface, and when the foldable display device is in the second state, two joint surfaces respectively belonging to two adjacent foldable members are jointed together by the plurality of bonding units.

13. The foldable display device of claim 1, wherein the folding member has a display panel and a folding frame, the folding frame comprises a back plate and a side wall at an edge of the back plate, the display panel is located at one side of the back plate, and the side wall extends along a side facing the display panel;

the folding frame is internally provided with an accommodating cavity between the display panel and the back plate, and when the folding display device is in the second state, the protection component is accommodated in the accommodating cavity.

14. The foldable display device according to claim 1, wherein a plurality of the protection members are arranged on the joint surface in sequence along the extension direction of the joint surface.