CN209859510U

CN209859510U - Flexible display device

Info

Publication number: CN209859510U
Application number: CN201920611188.1U
Authority: CN
Inventors: 韩文; 张卓; 王芳
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2019-12-27
Anticipated expiration: 2029-04-29

Abstract

The application provides a flexible display device, includes: the display module comprises a display panel, a protective cover plate and a metal supporting layer, wherein the protective cover plate and the metal supporting layer are respectively positioned on two sides of the display panel; the accommodating shell is provided with a hollow cavity, one side of the accommodating shell is provided with an opening channel, the opening channel is provided with a chain buckle, an elastic member, a first scroll and a second scroll are arranged in the hollow cavity of the accommodating shell, the elastic member is fixed in the hollow cavity, and one end of the elastic member is connected with a first extending part of the protective cover plate; the display module comprises a display module body, a chain buckle, a first reel and a second reel, wherein the chain buckle is used for splitting the display module body into a first component and a second component and combining the first component and the second component into the display module body, the first reel is used for rolling or unfolding the first component, and the second reel is used for rolling or unfolding the second component. This application carries out the rolling through the mode with the display module assembly split to reduce the stress that receives when display panel curls, avoid display panel to produce risks such as crackle and rete split.

Description

Flexible display device

Technical Field

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

Background

Since the flexible display panel can be manufactured in various forms, it is very popular in the application market. Meanwhile, as the demand for visual enjoyment increases, larger and larger display screens are becoming the development direction of the future market. However, the excessively large display panel is not favorable for carrying out and storing. At present, a flexible display usually adopts a mode that a display panel is folded outwards or folded inwards or a single roller is curled to convert a large screen and a small screen, but if the bending radius is small or the diameter of a scroll is small, the display panel can generate failures such as film splitting, cracks and the like due to overlarge local stress. Therefore, how to reduce the stress when the flexible display panel is folded/rolled by using the bending resistance and other properties of the flexible display panel, so that the flexible display panel is stored in a smaller space becomes a problem to be solved.

Therefore, the prior art has defects and needs to be improved urgently.

SUMMERY OF THE UTILITY MODEL

The application provides a flexible display device can solve flexible display panel receives when rolling/folding bending stress too big and the risk such as rete split appears and produce the crackle to and the great scheduling problem of occupation space.

In order to solve the above problems, the technical solution provided by the present application is as follows:

the application provides a flexible display device, includes:

the display module comprises a display panel, a protective cover plate and a metal supporting layer, wherein the protective cover plate and the metal supporting layer are respectively positioned on two sides of the display panel;

the display module comprises a containing shell, a first component and a second component, wherein a hollow cavity is formed in the containing shell, an opening channel is arranged on one side of the containing shell, and a chain buckle is arranged at the opening channel and used for splitting the display module into the first component and the second component and combining the first component and the second component into the display module;

an elastic member, a first reel and a second reel are arranged in the hollow cavity, the elastic member is fixed in the hollow cavity, the first component is connected with one end of the elastic member through the first reel, the first reel is used for winding or unwinding the first component, the second component is connected with the second reel, and the second reel is used for winding or unwinding the second component;

and the display module is rolled or unfolded through the splitting or combination of the chain buckle.

In the flexible display device of the present application, a radius of a cross section of the first scroll shaft is smaller than or equal to a radius of a cross section of the second scroll shaft.

In the flexible display device of the present application, at least two first reels are arranged in parallel and in a staggered manner.

In the flexible display device of the present application, a radius of the first reel is less than or equal to 1 mm.

In the flexible display device of the application, the display panel and the contact surface between the metal supporting layers are respectively provided with a protrusion and a recess, and the protrusion and the recess are matched with each other.

In the flexible display device of this application, the link with the edge portion of display module assembly is connected, works as the link will first subassembly with the second subassembly merges to be when the display module assembly, display panel with on the contact surface between the metal supporting layer the arch with the recess is in the block state, works as the link will the display module assembly split becomes first subassembly with during the second subassembly, display panel with on the contact surface between the metal supporting layer the arch with the recess is in the separation state.

In the flexible display device of the present application, the first assembly includes the protective cover sheet, and the second assembly includes the display panel and the metal support layer; alternatively, the first assembly includes the protective cover and the display panel, and the second assembly includes the metal support layer.

In the flexible display device of this application, flexible display device still includes the handle, the handle corresponds the opening passageway set up in outside the cavity, just the handle with the one end of display module assembly is connected, the length/width of handle is greater than the length/width of opening passageway is used for display module assembly rolling in when holding the shell will display module assembly's tip card is held the cavity outside.

In the flexible display device of the present application, the elastic member includes a coil spring having one end connected with the first extension of the protective cover.

In the flexible display device of the present application, the second extension of the metal support layer is connected to the second reel.

In the flexible display device of this application, opening passageway department is provided with the hasp, works as display panel by pull out in the holding shell to predetermineeing behind the length the hasp is in the closed condition, works as when the rolling of display module assembly, the hasp is in the open mode.

The beneficial effect of this application does: compare in current flexible display device, the flexible display device that this application provided through changing traditional single roll coiling rolling mode, adopts the mode rolling respectively that becomes different subassemblies with the display module assembly split. A plurality of superfine reels which are staggered left and right are introduced into the containing shell, so that the display panel with larger area is rolled in the containing shell. The number of the scroll shafts adopts an even number design, so that the display panel exists in the containing shell in an S-shaped winding mode to form a multilayer mixed winding mode. The design greatly counteracts the tensile stress and the compressive stress applied to the assembly, and reduces failures such as film splitting, cracks, bright lines, dark lines and the like caused by the increase of the local stress of the assembly, thereby realizing smaller curling radius. Meanwhile, the length of the protective cover plate is far greater than that of the display panel, the display panel is not stressed in the pulling process, and the protective cover plate is actually pulled by the coil spring. In addition, the protecting cover plate always has pretension, so that the problem of unevenness of the display panel after curling is solved, and the surface flatness and hardness are improved.

Drawings

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

FIG. 1 is a schematic view of a flexible display device according to an embodiment of the present application when deployed;

fig. 2 is a schematic diagram of a flexible display device provided in an embodiment of the present application when being rolled up;

fig. 3 is a schematic film layer diagram of a display module according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional view of a contact surface of a first component and a second component according to an embodiment of the present disclosure.

Detailed Description

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.

This application is to current flexible display device, has flexible display panel and receives bending stress when rolling/folding too big and the risk such as rete split appears and produce crackle to and the great technical problem of occupation space, this defect can be solved to this embodiment.

Fig. 1 is a schematic view of a flexible display device according to an embodiment of the present application when the flexible display device is unfolded. The flexible display device comprises a display module 10, wherein the display module 10 comprises a display panel 12, and a protective cover plate 13 and a metal supporting layer 11 which are respectively positioned on two sides of the display panel 12. The metal supporting layer 11 has a predetermined hardness, and can support the display panel 12 when the display module 10 is unfolded. When the display module 10 is in the unfolded state, the display module 10 is an integral stacked structure formed by the metal supporting layer 11, the display panel 12 and the protective cover plate 13 which are sequentially stacked.

Wherein the display panel 12 includes a flexible OLED display panel, a WOLED display panel, an LCD display panel, a Micro-LED display panel (Micro-LED), and the like. The protective cover 13 is a conventional package cover or the like, and is not limited herein.

The flexible display device further comprises a containing shell 20, wherein a hollow cavity 21 is formed in the containing shell 20 and is used for containing the display module 10 when the display module 10 is rolled; one side of the housing case 20 is provided with an opening channel 22, the cross-sectional area of the opening channel 22 is larger than that of the display module 10, and the display module 10 can be pulled out of the housing case 20 through the opening channel 22 and rolled in the housing case 20 through the opening channel 22.

The peripheral edge of the open channel 22 is designed to be rounded or to increase smoothness, so as to ensure that the surface of the display module 10 is not scratched.

A chain 23 is disposed at the opening channel 22 of the accommodating case 20, and the chain 23 is used for splitting the display module 10 into a first component and a second component, and is also used for combining the first component and the second component into the display module 10.

Wherein the first assembly comprises the display panel 12 and the protective cover 13, and the second assembly comprises the metal support layer 11; alternatively, the first assembly includes the protective cover 13, and the second assembly includes the display panel 12 and the metal support layer 11.

An elastic member 24, a first reel 25 and a second reel 26 are arranged in the hollow cavity 21 of the accommodating case 20, the elastic member 24 is fixed in the hollow cavity 21, and one end of the elastic member 24 is connected with a first extending portion 131 of the protective cover 13; a second extension 111 of the metal support layer 11 is connected to the second reel 26. Wherein the first reel 25 is used for winding or unwinding the first component, and the second reel 26 is used for winding or unwinding the second component.

Wherein the radius of the cross section of the first roller 25 is smaller than or equal to the radius of the cross section of the second roller 26. In consideration of the space ratio and the difference in bending performance between the first component and the second component, the radius of the cross section of the first winding shaft 25 is smaller than that of the cross section of the second winding shaft 26, and the volume of the housing case 20 is made as small as possible.

In this embodiment, at least two first reels 25 are arranged in parallel and in a staggered manner. Only four first reels 25 and one second reel 26 are illustrated, but not limited thereto, and the first reels 25 and the second reel 26 may include a plurality of reels. As shown in the figure, the axial direction of the first reel 25 is perpendicular to the moving direction of the display module 10, and the length of the first reel 25 in the axial direction is greater than or equal to the width of the display module 10. The second roller 26 is of similar design to the first roller 25, except that the cross-sectional radii of the two are different. Wherein the cross-sectional radii of the first reels 25 are all equal.

In addition, the first reel 25 and the second reel 26 are respectively located at two sides of the hollow cavity 21, and a preset distance is provided between the first reel and the second reel, so as to prevent interference or friction scratch formed between the first component and the second component when the first component and the second component are wound or unwound.

In one embodiment, the first spool 25 has a cross-sectional radius of less than or equal to 1mm, thereby further reducing the space of the containment case 20 over the range of bending stresses of the first component.

As shown in the figure, the first winding shafts 25 are designed in a staggered manner, and after the display module 10 is unfolded, the first extending portions 131 of the protective cover 13 are wound around two adjacent first winding shafts 25 in an S-shaped winding manner and connected to the elastic members 24. The elastic member 24 includes, but is not limited to, a coil spring having one end connected to the first extension 131 of the protective cover 13. Since the protective cover 13 is actually pulled by the coil spring, that is, the display panel 12 is not pulled by the coil spring during the pulling process, the display panel 12 can be protected from being damaged; and because the coil spring prestresses the protective cover plate 13, the problem of unevenness of the surface of the display panel 12 after being unfolded or rolled is prevented, and the surface flatness and hardness are improved.

Similarly, the second roller 26 may also have a pretension on the metal supporting layer 11, so that the display module 10 maintains the flatness of its surface when being unfolded.

Referring to fig. 2, a schematic view of a flexible display device provided in the embodiment of the present application when being rolled up is shown. The display module 10 can be wound in the housing case 20 by the pretension force of the coil spring, or can be wound by other external forces, and the like, which is not limited herein. When the display module assembly 10 is rolled up, the display module assembly is disassembled into the first component and the second component by the chain 23, and when at least a part of the first component of the combination of the protective cover 13 and the display panel 12 is received in the receiving case 20, the parts of the protective cover 13 and the display panel 12 received in the receiving case 20 are rolled up on two adjacent first rollers 25 in an S-shape. That is, the display panel 12 attached to the protective cover 13 is rolled up following the rolling up of the protective cover 13. At the same time, the second assembly of the metal supporting layer 11 is also wound on the second reel 26, wherein the winding/unwinding of the first assembly and the second assembly are performed simultaneously.

Since the coil spring exerts a pretension on the protective cover 13, the flatness of the surface is also ensured when the first component is rolled into the housing shell 20. The second component also has the same processing, and is not described in detail here.

In the present embodiment, the second reel 26 with a larger cross-sectional radius is mainly used for rolling up the metal support layer 11, and the first reel 25 with a smaller cross-sectional radius is mainly used for rolling up the protective cover 13 and the display panel 12. Since the metal supporting layer 11 is mostly made of metal material (SUS or amorphous), its modulus is very high and is not ductile material, and under the same bending radius, the deformation is smaller than that of the first component, and the smaller roll radius affects the flatness after being unwound. Therefore, in the rolling design, in the mode of rolling the display panel 12 separately from the metal supporting layer 11, the metal supporting layer 11 is rolled on the second reel 26 with a larger cross-sectional radius in a single-roll rolling manner. This design reduces the stress build-up of the display panel 12 due to different deformation rates on the one hand and allows the more flexible display panel 12 to be rolled up onto the first roll 25 with a smaller cross-sectional radius, thereby saving a lot of rolling space.

In the present embodiment, the number of the first reels 25 is an even number, and the reels have a cross-sectional radius of not more than 1 mm. Therefore, the display panel 12 wound in the housing case 20 exists in an S-shape, forming a multi-layer hybrid winding mode. Since the display panels 12 of the inner and outer wraps, which correspond to each other, are subjected to the same/similar tensile and compressive stresses by being wound on the first reels 25 having the same diameter, the stress on the film is released, so that the first assembly as a whole exhibits more dispersed and smaller stress, thereby allowing the display panels 12 to be wound on thinner reels without failure such as film splitting, cracks, and bright/dark lines due to stress increase.

As shown in fig. 1 and fig. 2, since the fastener 23 is disposed at the opening channel 22, when the display module 10 is rolled inward, the display module is detached through the fastener 23; when the display module 10 is pulled out, the combination is realized through the chain 23. In addition, a handle 30 is disposed at one end of the display module 10, the handle 30 is disposed outside the hollow cavity 21 corresponding to the opening channel 22, the handle 30 is connected to one end of the display module 10, the length/width of the handle 30 is greater than that of the opening channel 22, and the handle 30 is used for pulling out the display panel 12 wound in the housing case 20 and clamping the end of the display module 10 outside the hollow cavity 21 when the display module 10 is wound in the housing case 20 to complete winding.

In one embodiment, a latch (not shown) is disposed at the opening channel 22, and when the display panel 12 is pulled out from the accommodating case 20 to a preset length (or completely pulled out), the latch is in a closed state, so that the first extending portion 131 and the second extending portion 111 in the accommodating case 20 are not pulled out continuously; when the display module 10 is rolled, the lock catch is in an open state, so that the display module 10 is rolled in the accommodating shell 20 through the tension of the coil spring.

Fig. 3 is a schematic view of a film layer of a display module according to an embodiment of the present disclosure. The display panel 12 is sandwiched between the protective cover 13 and the metal supporting layer 11. Wherein the length of the protective cover 13 is greater than the lengths of the display panel 12 and the metal support layer 11; the length of the metal supporting layer 11 is equivalent to the length of the display panel 12, or the length of the metal supporting layer 11 is between the length of the protective cover 13 and the length of the display panel 12.

Fig. 4 is a schematic cross-sectional view of a contact surface between a first component and a second component according to an embodiment of the present disclosure. The display panel 12 is attached to the protective cover 13 to form the first component, the metal supporting layer 11 forms the second component, a contact surface between the display panel 12 and the metal supporting layer 11 is provided with a protrusion 40 and a recess 50, and the protrusion 40 and the recess 50 are matched with each other.

The protrusions 40 and the recesses 50 may be distributed on the entire surface of the contact surface, or may be distributed on local positions of the contact surface, and the number, position, shape, and size of the protrusions 40 and the recesses 50 are not limited in this embodiment, as long as the first component and the second component can be mutually engaged through the protrusions 40 and the recesses 50.

In one embodiment, the fastener 23 is connected to an edge portion of the display module 10, and the protrusion 40 and the recess 50 are disposed corresponding to the position of the fastener 23, when the fastener 23 combines the first component and the second component into the display module 10 (i.e., when the display module is pulled out), the protrusion 40 and the recess 50 on the contact surface between the display panel 12 and the metal supporting layer 11 are in a snap-fit state, so that there is no gap/bubble between the display panel 12 and the metal supporting layer 11; when the display module assembly 10 is separated into the first component and the second component by the fastener 23 (i.e. when the display module assembly is rolled up), the protrusion 40 and the recess 50 on the contact surface between the display panel 12 and the metal supporting layer 11 are in a separated state.

The display panel 12 includes a back plate 121 adjacent to one side of the metal support layer 11, and the protrusions 40 and the recesses 50 are formed on a surface of the back plate 121 contacting the metal support layer 11.

In the present embodiment, the housing case 20 is designed to be circular, but is not limited to be circular in sequence, and may be other designs.

To sum up, the flexible display device that this application provided curls the rolling mode through changing traditional single roller, adopts the mode rolling respectively that becomes different subassemblies with the display module assembly split. A plurality of superfine reels which are staggered left and right are introduced into the containing shell, so that the display panel with larger area is rolled in the containing shell. The number of the scroll shafts adopts an even number design, so that the display panel exists in the containing shell in an S-shaped winding mode to form a multilayer mixed winding mode. The design greatly counteracts the tensile stress and the compressive stress applied to the assembly, and reduces failures such as film splitting, cracks, bright lines, dark lines and the like caused by the increase of the local stress of the assembly, thereby realizing smaller curling radius. Meanwhile, the length of the protective cover plate is far greater than that of the display panel, the display panel is not stressed in the pulling process, and the protective cover plate is actually pulled by the coil spring. In addition, the protecting cover plate always has pretension, so that the problem of unevenness of the display panel after curling is solved, and the surface flatness and hardness are improved.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims

1. A flexible display device, comprising:

2. A flexible display device according to claim 1, wherein the radius of the cross-section of the first roller is smaller than or equal to the radius of the cross-section of the second roller.

3. The flexible display device according to claim 1, wherein at least two first reels are disposed in parallel and offset, and when at least a portion of the first assembly is received in the receiving case, the first assembly is wound on two adjacent first reels in an "S" shape.

4. The flexible display device of claim 1, wherein the radius of the first roller is less than or equal to 1 mm.

5. The flexible display device according to claim 1, wherein the contact surface between the display panel and the metal support layer is provided with a protrusion and a recess, respectively, and the protrusion and the recess are matched with each other.

6. The flexible display device according to claim 5, wherein the fastener is connected to an edge portion of the display module, when the fastener merges the first component and the second component into the display module, the protrusion and the recess on the contact surface between the display panel and the metal support layer are in a snap-fit state, and when the fastener separates the display module into the first component and the second component, the protrusion and the recess on the contact surface between the display panel and the metal support layer are in a separate state.

7. The flexible display device of claim 1, wherein the first assembly comprises the protective cover sheet, and the second assembly comprises the display panel and the metal support layer; alternatively, the first assembly includes the protective cover and the display panel, and the second assembly includes the metal support layer.

8. The flexible display device according to claim 1, further comprising a handle, wherein the handle is disposed outside the hollow cavity corresponding to the opening channel, and the handle is connected to one end of the display module, and the length/width of the handle is greater than that of the opening channel, so as to hold the end of the display module outside the hollow cavity when the display module is rolled in the housing.

9. The flexible display device of claim 1, wherein the elastic member comprises a coil spring, one end of the coil spring being connected with the first extension of the protective cover.

10. A flexible display device according to claim 1, wherein a second extension of the metal support layer is connected to the second reel.

11. The flexible display device according to claim 1, wherein a lock catch is disposed at the open channel, and when the display panel is pulled out from the housing to a predetermined length, the lock catch is in a closed state, and when the display module is rolled, the lock catch is in an open state.