KR102434719B1 - Foldable display apparatus - Google Patents

Abstract

A foldable display device according to an embodiment of the present specification includes a first support plate and a second support plate supporting at least a portion of a display panel, and a chain-type hinge portion between the first support plate and the second support plate, When the first support plate and the second support plate are folded through the hinge part, one surface of the first support plate and one surface of the second support plate are configured to contact each other, so that the durability and image quality may be excellent.

Description

FOLDABLE DISPLAY APPARATUS

The present invention relates to a foldable display device, and more particularly, to a foldable display device capable of minimizing stress applied to a bending area of a display panel.

Recently, as we enter the information age, the field of display that visually expresses electrical information signals has developed rapidly, and in response to this, various display devices with excellent performance of thinness, light weight, and low power consumption have been developed. is being developed

Specific examples of such a display device include a liquid crystal display device (LCD), a field emission display device (FED), an organic light emitting display device (OLED), and a quantum dot display device. (Quantum Dot Display Device) etc. are mentioned.

Among them, the liquid crystal display includes an array substrate including thin film transistors, an upper substrate including a color filter and/or a black matrix, and a liquid crystal layer between the array substrate and the upper substrate. In such a liquid crystal display device, an image is displayed by controlling the arrangement of liquid crystal layers according to an electric field applied between two electrodes in a pixel region and controlling light transmittance according to the arrangement.

In addition, the organic light emitting display device is a self-light emitting device, and has received widespread attention because it has advantages of fast response speed, luminous efficiency, luminance, and viewing angle compared to other display devices.

Recently, as the demand for a large screen in portable electronic devices increases, a device implementing a large screen display by connecting a flat panel display panel has been developed and commercialized. In particular, a foldable display apparatus using the advantage of a flexible display panel that can be bent or folded is in the spotlight as a next-generation technology in the display field due to the advantage of being able to provide a large-screen display unit while maintaining portability. . Such a foldable display device is not only a portable electronic device such as a mobile communication terminal, an electronic notebook, an electronic book, a PMP (Portable Multimedia Player), a navigation system, a UMPC (Ultra Mobile PC), a mobile phone, a smart phone, a tablet PC (Personal Computer), etc. It can be applied to various fields such as television and monitor.

Recently, a technology for forming an organic light emitting display device on a plastic substrate has been developed, and it is possible to implement a foldable or flexible display device in which an organic light emitting layer is grafted as described above. From now on, the foldable or flexible display device will be collectively referred to as a foldable display device.

The display device implements a folding and unfolding operation by arranging a support plate capable of supporting and holding the display panel in order to bend or fold the display panel, and a hinge portion capable of evenly forming a fold between the support plate. However, when the folding and unfolding operation is implemented with the configuration of the display device in the past, the surface of the display panel is not uniformly flattened but curved and the screen is distorted, or the folding surface of the display panel or the There are problems with cracks or cracks in the corners.

In addition, when the display panel is folded or unfolded, a restoring stress to restore the previous state is applied to the display panel, so that the folded state cannot be maintained and the display panel is unfolded or folded without maintaining the unfolded state.

Accordingly, the inventors of the present specification recognize the above-mentioned problems, and conduct various experiments to maintain a uniform state of the display surface when the display panel is folded or unfolded, to prevent cracking or breakage, and to maintain the folded or unfolded phenomenon. became Through several experiments, a display device with a new structure has been developed in which the surface of the display panel is maintained uniformly when the display panel is folded or unfolded and the screen is not distorted.

In addition, when the display panel is folded and unfolded, a crack at the edge of the fold of the display panel or damage that may occur on the surface of the fold, which is mainly caused by reducing the stress that the display panel can receive Invented a display device with a new structure that can reduce the

And, when the display device is folded or unfolded, a display device having a new structure so that the folded and unfolded state can be maintained was invented.

The problem to be solved according to the embodiment of the present specification is that the surface of the display panel is uniform without inflection points, does not crack or break, and maintains a constant folded or unfolded shape even when a display device to which a flexible display panel is applied is folded or unfolded. It is to provide a display device capable of

The problems to be solved according to the embodiments of the present specification are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A display device according to an embodiment of the present specification includes a display panel displaying an image, a first support plate and a second support plate supporting at least a portion of the display panel, and a chain type between the first support plate and the second support plate. When the first support plate and the second support plate are folded through a hinge part, at least one magnet in the hinge part, a sliding frame disposed between the display panel and the second support plate to support the display panel, and a chain-type hinge part, and contacting one surface of the first support plate and one surface of the second support plate.

A display device according to an embodiment of the present specification includes a display panel, a first plate and a second plate positioned on the rear surface of the display panel, a multi-axis hinge part between the first plate and the second plate, and at least one or more in the multi-axis hinge part. and a magnet, a sliding member disposed between the display panel and the second plate to support the display panel, and a rear surface bonding of the first plate and the second plate by bending a multi-axis hinge.

Specific details of other embodiments are included in the detailed description and drawings.

The display device according to the embodiment of the present specification has no screen curvature when the foldable display device is folded or unfolded, and is composed of a mechanism capable of minimizing the compressive stress or tensile stress applied to the flexible display panel in the folding or unfolding operation. By folding or unfolding this clear display device, it is easy to carry and store, and a large screen can be realized.

In addition, the display device according to the embodiment of the present specification is a mechanism of the display device to implement an out-foldable display that folds to show the panel by configuring two support plates and a multi-axis hinge part that can be folded and unfolded. can

In addition, the display device according to the embodiment of the present specification adds a guide segment to the multi-axis hinge portion to minimize exposure of the folded portion of the display panel to the outside and protect the edge of the display panel from impact. The durability of the display device may be further improved.

In addition, the display device according to the embodiment of the present specification is connected by a chain segment composed of multiple axes and has a very small folding radius of curvature and strongly supports the display panel. It is possible to implement a thin folding thickness of the device.

In addition, the display device according to the embodiment of the present specification arranges a plurality of magnets inside and near the multi-axis hinge part to maintain the unfolded state by the magnetic force of the plurality of magnets in the hinge part when the display device is in the unfolded state, so for a large screen. When the display device is used in an unfolded manner, the fixability may be improved.

In addition, the display device according to an embodiment of the present specification includes a spring and a magnet linked to a frame that is slidable while supporting the display panel, so that the display panel of the display device maintains a flat state without inflection points when the display device is unfolded. , it can be made to keep the unfolded state well.

Effects of the present specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

Since the content of the invention described in the problems to be solved above, the means for solving the problems, and the effects do not specify the essential characteristics of the claims, the scope of the claims is not limited by the matters described in the content of the invention.

1 is a view of an upper surface and a rear surface of a foldable display device according to an embodiment of the present specification.
2A is a side view of the foldable display device when it is unfolded.
2B is a side view of the foldable display device when it is folded.
3A and 3B are views for explaining an enlarged and cross-sectional structure of a hinge part when the foldable display device is folded.
FIG. 4 is a view for explaining a planar configuration of a part of a first support frame, a second support frame, and a hinge part in which the upper display panel is removed from the foldable display device.
5 is a view showing a cross section AA′ of FIG. 4 according to the first structure of the embodiment of the present specification.
6 is a view illustrating a fixing device according to another embodiment of the foldable display device of the present specification, and is a view showing a cross-section BB′ of FIG. 4 .
7 is a view showing a fixing device according to another embodiment of the foldable display device of the present specification, and is an enlarged view of the plane C of FIG. 4 .
8 is a view showing a fixing device according to another embodiment of the foldable display device of the present specification, and is an enlarged view of a section D of FIG. 5 .
9A and 9B are diagrams illustrating a coupling structure of a display device and a fixing device according to an embodiment of the present specification, and an operation principle of each fixing device, a hinge unit, and a sliding frame when the display device is folded or bent.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless specifically stated otherwise.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described as 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

In describing the components of the present specification, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected,” “coupled,” or “connected” through another component.

As used herein, the term “display device” refers to a liquid crystal module (LCM) including a display panel and a driving unit for driving the display panel, an organic light emitting display module (OLED Module), and a quantum dot module (Quantum Dot Module). may include a display device of And, LCM, OLED, a finished product (complete product or final product) including QD modules, such as notebook computers, televisions, computer monitors, automotive devices (automotive display) or other types of vehicles (vehicle) including electric devices, etc. A set electronic device such as an equipment display, a mobile electronic device such as a smart phone or an electronic pad, or a set device or set apparatus may also be included.

Accordingly, the display device in the present specification may include a set device that is an application product or an end-user device including a narrow display device itself, such as an LCM, OLED, QD module, and the like, and an LCM, OLED, QD module, and the like.

In addition, in some cases, LCM, OLED, and QD modules composed of a display panel and a driving unit are expressed as “display devices” in a narrow sense, and electronic devices including LCM, OLED, and QD modules are referred to as “set devices”. It can also be expressed separately as For example, a display device in the narrow sense includes a liquid crystal (LCD), organic light emitting (OLED) or quantum dot display panel, and a source PCB that is a control unit for driving the display panel, and the set device is connected to the source PCB. It may be a concept further comprising a set PCB, which is a set controller that is electrically connected to control the entire set device.

The display panel used in this embodiment is all types of liquid crystal display panel, organic light emitting diode (OLED) display panel, quantum dot display panel (QD: Quantum Dot), electroluminescent display panel, etc. of the display panel may be used, and is not limited to a specific display panel capable of generating sound by vibrating by the sound generating actuator of the present embodiment. In addition, the display panel used in the display device according to the embodiment of the present specification is not limited to the shape or size of the display panel.

More specifically, when the display panel is a liquid crystal display panel, it includes a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. In addition, an array substrate including a thin film transistor as a switching element for controlling light transmittance in each pixel, an upper substrate including a color filter and/or a black matrix, and the like, and a liquid crystal layer formed between the array substrate and the upper substrate It may be composed of

In addition, when the display panel is an organic light emitting (OLED) display panel, it may include a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. In addition, an array substrate including a thin film transistor as a device for selectively applying a voltage to each pixel, an organic light emitting device (OLED) layer on the array substrate, and an encapsulation substrate disposed on the array substrate to cover the organic light emitting device layer Alternatively, it may be configured to include an encapsulation substrate or the like. The encapsulation substrate may protect the thin film transistor and the organic light emitting device layer from external impact, and may prevent penetration of moisture or oxygen into the organic light emitting device layer. In addition, the layer formed on the array substrate may include an inorganic light emitting layer, for example, a nano-sized material layer or quantum dots.

In addition, the display panel may further include a backing such as a metal plate attached to the display panel. It is not limited to the metal plate, and other structures may be included.

In the present specification, a display panel including a sound generator may be applied to a vehicle as a user interface module such as a central control panel in an automobile. For example, such a display panel may be implemented between occupants of two front seats so that vibration of the display panel is propagated toward the interior of the vehicle. Thus, the audio experience in the vehicle can be improved compared to having speakers only on the interior sides of the vehicle.

Each feature of the various embodiments of the present specification may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each embodiment may be independently implemented with respect to each other or may be implemented together in a related relationship. may be

Hereinafter, an embodiment of the present specification will be described in detail with reference to the accompanying drawings and embodiments.

1 is a view showing a foldable display device including a flexible display panel according to an embodiment of the present specification.

Referring to FIG. 1 , the foldable display device according to the present example includes a display panel 100 for displaying an image, support plates 300 and 400 supporting the display panel, and support plates 300 and 400 by folding or It may include an expandable hinge unit 200 .

Figure 2a is a side view when the foldable display device of the present specification is unfolded.

Referring to Figure 2a, the display panel is not visible from the side due to the frame for supporting and holding the display panel by the first support plate 300, the second support plate 400, and the hinge part 200, as shown in a dotted line. The first support plate 300 , the second support plate 400 , and the hinge part 200 may be expressed to be inside.

2B is a side view when the foldable display device of the present specification is folded or bent.

Referring to FIG. 2B , the display device is folded due to the hinge part 200 between the first support plate 300 and the second support plate 400 , so that the rear surface of the first support plate 300 and the second support plate 300 are folded. The rear surface of the plate 400 is in contact with the horizontal and the display panel slides on the upper surface of the first support plate 300 and on the upper surface of the second support plate 400 , so that the dotted line along the inner curvature of the hinge part 200 . It can also be expressed as a folding structure like

3A is an enlarged side view of a hinge part in which the foldable display device of the present specification is folded.

Referring to FIG. 3A , five pieces of guide segments 201 to 205 of the hinge part 200 can be rolled in a semicircular shape based on a certain curvature, and the contracted surface is narrow and the tensioned surface is a constant wedge shape. It may be configured, but is not necessarily limited to the number or wedge shape of the configuration and may have a variety of numbers and shapes.

3B is a vertical cross-sectional structural view according to FIG. 3A of the present specification.

Referring to FIG. 3B , 6 pieces of chain segments 210 to 260 having an Ω shape as an internal configuration of the hinge unit 200 are organically connected to each other due to a multiaxial shaft and folded to have a small radius. can be realized The guide segments 201 to 205 may cover side perimeters of the chain segments 210 to 260 .

Here, the display panel 100 is located inside the first support plate 300 , the second support plate 400 , and the hinge part 200 as shown by the dotted line in FIG. 3A , and in particular, the display panel 100 positioned on the hinge part. ) is mounted on the display device to have a radius of curvature of 5.5R, and at this time, the side edge of the display panel 100 is covered by the guide segments 201 to 205 of the hinge, so that it is protected from external impact. The display panel 100 may be protected. The radius of curvature of the display panel 100 positioned on the hinge unit 200 is not necessarily limited to 5.5R and may be configured in various ways. In addition, the hinge part 200 supports the display panel 100 to be bent with a certain radius of curvature, and due to the role of covering the side edge of the display panel, the display panel 100 is subjected to excessive bending stress (Bending Stress). However, it may serve to reduce the impact received by the display panel 100 by first absorbing an external impact while preventing it from receiving tensile stress.

In addition, the guide segments 201 to 205 and the chain segments 210 to 260 may be configured as a single mass or may be coupled to each other as separate components.

4 is a plan view of a device of the foldable display device according to an embodiment of the present specification, which is a view showing a part of the device from which the display panel 100 of the foldable display device of FIG. 1 is removed.

Referring to FIG. 4 , a portion of the first support plate 300 , the second support plate 400 , and the second support plate 400 are disposed in the display panel 100 when the display panel 100 is removed. A sliding frame 500 and a hinge unit 200 that enable sliding may be expressed. Here, the hinge part 200 is positioned between the frame protrusion 510 and the frame protrusion 510 and the hinge part 200 protruding from the sliding frame 500 in the direction of the hinge part 200 in detail to the sliding frame 500 . ), there is a first spring 511 that provides tension in the opposite direction. And a fixing member 600, a first magnet 710 and a second magnet 810, which allow the sliding frame 500 to maintain a sliding state toward the end of the second support frame when the foldable display device is in an unfolded state, and There may be a third magnet 910 of the hinge unit 200 . Six to twelve first magnets 710 and second magnets 810 may be arranged in parallel along the end of the second support plate 400 .

5 is a cross-sectional view taken along the cutting line A-A' of FIG. 4 .

Referring to FIG. 5 , the sliding frame 500 disposed on the second support plate 400 including the chain segments 250 and 260 of the hinge part 200 along the cut line A-A' of FIG. There is a fixing member 600 for fixing and a second spring 610 for providing tension in the direction of the display panel 100 to the fixing member, and a frame protrusion protruding from the sliding frame 500 and in contact with the first spring 511 ( 510) may be present. The above-described second spring 610 is in the form of a leaf spring, but is not limited thereto, and the first spring 511 is in the form of a coil spring, but is not limited thereto. A first magnet 710 is disposed on the opposite end of the hinge portion 200 of the sliding frame 500, and a second magnet 810 is disposed on the opposite end of the hinge portion 200 of the second support plate 400. When the foldable display device is unfolded, the first magnet 710 and the second magnet 810 may be attached to each other by magnetic force.

FIG. 6 is a view taken along the cutting line B-B' of FIG. 4 .

6 and 4 and 5, the fixing member 600 supported by the tension of the Ω-shaped plate spring 610 and the leaf spring 610 in the groove formed in the second support plate 400, and There may be a sliding frame 500 capable of maintaining a fixed state by the fixing member 600 . It can be understood how the foldable display device is fixed when it is converted from a folded state to an unfolded state through FIGS. 5 and 6 . When the foldable display device is in the folded state from the unfolded state, the first spring 511 is compressed and the first magnet 710 while the sliding frame 500 supporting the display panel 100 moves in the hinge part 200 direction. And the magnetic attachment state of the second magnet 810 is released, and the fixing member 600 that has been fixing the sliding frame 500 goes down by the force pushing the sliding frame 500 toward the hinge part 200, 2 The spring 610 may be compressed. There is no causal order as the above operations occur almost simultaneously. In addition, when the folded state is changed to the unfolded state, it can be said that the above operations are executed in reverse.

FIG. 7 is an enlarged view of area C of FIG. 4 .

Referring to FIG. 7 , in the vicinity of the hinge unit 200 and the chain segments 210 to 250 of the hinge, third magnets 910,930,950, fourth magnets 920,940,960, and fifth magnets 901 to 906 are arranged on a plane can understand In the case of the fifth magnets 901 to 906, 2 to 3 sets may be additionally formed in addition to 1 set of six magnets. In the drawing, a total of 3 sets of fifth magnets 901 to 906 are disposed between the chain segments 210 to 250 of the hinge, and the third magnets 910,930,950 and the fourth magnets 920,940,960 above and below the fifth magnets 901 to 906. ) are placed. When the foldable display device is in the unfolded state through the third magnets 910,930,950, the fourth magnets 920,940,960, and the fifth magnets 901 to 906, the third magnets 910,930,950 and Adhesion between the fourth magnets 920 , 940 , and 960 and the fifth magnets 901 to 906 may be formed.

FIG. 8 is an enlarged view of area D of FIG. 5 .

Referring to FIG. 8 , when the foldable display device is in an unfolded state, the sliding frame 500 and the display panel 100 are pushed toward the end of the second support plate 400 , and at this time, the first magnet protruding from the sliding frame 500 . The first magnet 710 held by the holder 550 and the second magnet 810 held by the second magnet holder 420 protruding from the second plate 400 are attached by mutual magnetic force to form a foldable display device. It can maintain the unfolded state.

9A and 9B are diagrams for expressing the principle of operation of the main driving unit when the foldable display device is unfolded and folded.

First, referring to FIG. 9A , when the foldable display device is in an unfolded state, the display panel 100 and the sliding frame 500 supporting it move in the direction of the second magnet 810 disposed on the second plate 400 . Thus, the first magnet 710 disposed on the sliding frame 500 is in contact with the second magnet 810 by magnetic force, and the fixing member 600 raised by the tension of the second spring 610 is the sliding frame 500 . ) of the hinge unit 200 toward the side end may be blocked to maintain the unfolded state of the foldable display device. At this time, the first spring interlocked with the sliding frame 500 generates tension to push the sliding frame 500 toward the second magnet 810 . Due to this, the surface of the flexible display panel 100 may be flattened without a curved portion.

Next, referring to FIG. 9B , when you want to convert the foldable display device from an unfolded to a folded state, the third magnets 910,930,950 and the fourth magnets 920,940,960 and the fifth magnets 901 to 906 near the hinge unit 100 ) When a force greater than the magnetic force for attachment is applied to the first support plate 300 and the second support plate 400, between the third magnets 910,930,950 and the fourth magnets 920,940,960 and the fifth magnets 901-906. The attachment is released so that the hinge part 200 can be folded. When the hinge part 200 starts to be folded, the surface area distance of the part in contact with the display panel 100 increases in the hinge part 200 , but since the length of the display panel 100 is constant, the sliding that supports the display panel 100 . A pulling force, that is, a tensile stress, is generated to move the frame 500 toward the hinge part 200 . The increased surface area distance of the hinge part 200 may be defined as G. At this time, the second spring ( 610) may be greater than the tension. Thus, as the first magnet 710 and the second magnet 810 fall, the fixing member is pushed under the sliding frame 500 , and as the first spring 511 is compressed, the sliding frame 500 becomes the hinge part 200 . ) when fully pulled in the lateral direction, the separation distance between the first magnet 710 and the second magnet 810 may be as much as the increased surface area distance G of the hinge part 200 . When the foldable display device is fully folded, the sixth magnet 1000 disposed in the first support plate 300 and the second magnet 810 disposed in the second support plate 400 face each other and are joined by mutual magnetic force. can If the magnetic force between the second magnet 810 and the sixth magnet 1000 is greater than the tension of the first spring 511 compressed by the sliding of the sliding frame 500, the foldable display device can maintain the folded state. have.

The foldable display device of the present invention described above is not limited by the above-described embodiments and drawings, and it will be apparent to those of ordinary skill in the art that various substitutions, modifications and changes are possible. will be.

100: display panel 200: multi-axis hinge
201 to 205: hinge guide segment 210 to 260: hinge chain segment
300: first plate 400: second plate
420: second magnet holder 500: sliding frame
510: frame protrusion 511: first spring
520: first magnet holder 600: fixing member
610: second spring 710: first magnet
810: second magnet 910, 930, 950: third magnet
920, 940, 960: fourth magnet 901-906: fifth magnet
1000: sixth magnet

Claims (25)

a display panel for displaying an image;
a first support plate and a second support plate for supporting at least a portion of the display panel;
a chain-shaped hinge portion between the first support plate and the second support plate;
one or more first magnets between the chain-shaped pieces of the hinge portion; and
and a sliding frame disposed between the display panel and the second support plate to support the display panel,
When the first support plate and the second support plate are folded through the hinge part, one surface of the first support plate and one surface of the second support plate are in contact with each other. The method of claim 1,
The foldable display device of claim 1, wherein the display panel is external when the display panel is folded. The method of claim 1,
At least one second magnet is coupled to a first side portion of the sliding frame on the second support plate, and at least one first spring member is coupled to a second side portion of the sliding frame, and the second support A foldable display device having at least one third magnet on one side of the plate. 4. The method of claim 3,
When the display panel is unfolded, the second magnet coupled to the sliding frame and the third magnet formed on one surface of the second support plate are attached, and when the display panel is folded, the second magnet coupled to the sliding frame and the third magnet formed on one surface of the second support plate is separated from each other, a foldable display device. 4. The method of claim 3,
When the display panel is unfolded, the first spring member coupled to the sliding frame is in a relaxed state, and when the display panel is folded, the spring coupled to the sliding frame is in a compressed state. The method of claim 1,
A folding display device having a fixing member for fixing the sliding frame to the second support plate and a second spring member coupled to the fixing member. 7. The method of claim 6,
The second spring member is a leaf spring and pushes the fixing member, a foldable display device. The method of claim 1,
The chain-shaped hinge part is connected to each other in multiple axes and covers at least a portion of a side surface of the display panel when the display panel is folded. The method of claim 1,
The foldable display device of claim 1, wherein the first support plate has at least one fourth magnet and the second support plate has at least one fifth magnet, and the fourth magnet and the fifth magnet are adjacent to the hinge part. 10. The method of claim 9,
When the display panel is unfolded, the first magnet, the fourth magnet, and the fifth magnet are magnetically attached and fixed to each other, a foldable display device. display panel;
a first plate and a second plate positioned on a rear surface of the display panel;
a chain-shaped multi-axial hinge portion between the first plate and the second plate;
at least one or more first magnets between the chain-shaped pieces constituting the hinge of the multi-axis hinge part; and
and a sliding member disposed between the display panel and the second plate to support the display panel,
Front surfaces of each of the first plate and the second plate face a rear surface of the display panel, and the rear surfaces of each of the first plate and the second plate are adhered to each other by bending the multi-axis hinge part. 12. The method of claim 11,
The multi-axis hinge portion covers at least a portion of a side surface of the display panel when the display panel is folded. delete 12. The method of claim 11,
The multi-axis hinge part is connected to the first side part of the first plate, there is a sixth magnet inside the second side part side, and at least one second magnet is provided on the first side part of the sliding member on the second plate. The foldable display device is coupled and there is at least one third magnet on one surface of the second plate. 15. The method of claim 14,
A foldable display device, wherein the sixth magnet on the first plate and the third magnet on the second plate are attached to each other by magnetic force when the display panel is folded. 16. The method of claim 15,
When the sixth magnet and the third magnet are attached, the second magnet is separated from the third magnet, a foldable display device. 15. The method of claim 14,
The sliding member has a first holder for holding the second magnet, and the second plate has a second holder for holding the third magnet. 18. The method of claim 17,
The sum of the heights of the first holder and the second holder is equal to or less than the heights of the second magnet and the third magnet, a foldable display device. 19. The method of claim 18,
at least one fourth magnet on the first plate and at least one fifth magnet on the second plate, wherein the fourth magnet and the fifth magnet are adjacent to the multi-axis hinge unit. 20. The method of claim 19,
When the display panel is unfolded, the first magnet, the fourth magnet, and the fifth magnet are magnetically attached to maintain an unfolded state. first and second housings operatively movable by a hinge;
a display panel provided in the first housing and the second housing; and
a sliding device provided in at least one of the first housing and the second housing to operatively extend or accommodate the display panel;
The hinge is made in the form of a chain,
At least one first magnet is provided between the chain-shaped pieces, a foldable display device. 22. The method of claim 21,
The first magnet maintains the unfolding of the display panel, a foldable display device. 22. The method of claim 21,
At least one of the first housing and the second housing has a second magnet for maintaining the folding of the display panel. 22. The method of claim 21,
and a third magnet near the sliding device to maintain the unfolding of the display panel. 25. The method of claim 24,
There is a spring near the sliding device to maintain the unfolding of the display panel.

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