WO2020226335A1

WO2020226335A1 - Infolding type hinge unit with flexible display panel mounted thereon

Info

Publication number: WO2020226335A1
Application number: PCT/KR2020/005638
Authority: WO
Inventors: 박현민; 이성준
Original assignee: (주)에이유플렉스
Priority date: 2019-05-04
Filing date: 2020-04-28
Publication date: 2020-11-12

Abstract

The present invention relates to an infolding type hinge unit with a flexible display panel mounted thereon, characterized in that an up-down bar moving up and down is installed on the top of a hinge base that is installed in a foldable part of a foldable smartphone such that as the up-down bar moves down in a folded state of the foldable smartphone, a folded part of the flexible display panel does not come into contact with the up-down bar, and when the panel of the smartphone is unfolded, the up-down bar rises up to return back to the original position thereof, and is located at the same height as an upper panel.

Description

In-folding type hinge part on which the flexible display panel is installed

The present invention relates to an in-folding-type hinge portion in which a flexible display panel is installed, and more specifically, a foldable smartphone is provided by installing an up-down bar that moves up and down on the top of the hinge base installed at the foldable portion of the foldable smartphone. In the folded state, the up-down bar goes down so that the folded part of the flexible display panel does not come into contact with the up-down bar, and when the panel of the smartphone is unfolded, the up-down bar rises up and returns to its original position and is located at the same height as the top panel. It relates to an in-folding type hinge portion in which a flexible display panel is installed.

The mobile terminal may be configured to perform various functions. Examples of such various functions include a data and voice communication function, a function of taking a picture or a video through a camera, a function of recording a voice, a function of playing a music file through a speaker system, and a function of displaying an image or video.

Some mobile terminals include an additional function to play a game, while others are implemented as multimedia devices. Furthermore, recent mobile terminals can watch video or television programs by receiving broadcast or multicast signals.

In addition to the above functions, efforts are being made to support and increase the functions of the current mobile terminal. The above-described efforts include not only changes and improvement of structural elements forming the mobile terminal, but also addition and improvement of software or hardware.

In general, in a mobile terminal, a display module displays information processed by the mobile terminal. For example, when the mobile terminal is in a call mode, a user interface (UI) or a graphical user interface (GUI) related to a call is displayed.

In addition, when the mobile terminal is in a video call mode or a photographing mode, a photographed or/and received image, UI or GUI is displayed. The display module includes a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a 3D display. ), etc.

Among them, a flexible display (or flexible LCD) is currently being studied in earnest because of the advantage of being able to change its shape at will. However, it seems that it will take a lot of time in the future to carry a completely paper-like display like a scroll, as shown in current science fiction films.

Therefore, until the development of the flexible display is in progress and its use is activated in earnest, a transitional form will be used a lot, and this form will not differ much from the current terminal structure. In addition, when the currently developed flexible display is used in a mobile terminal, the necessity of describing the usage type and the protection method thereof arises.

Patent documents similar to the hinge part for a mobile communication device in which the flexible display panel according to the present invention is installed include Publication No. 10-2015-0096827, (name of the invention, a hinge device and a foldable display device having the same).

In the present invention, an up-down bar that moves up and down is installed on the top of a hinge base installed in a foldable portion of a foldable smartphone, so that when the foldable smartphone is folded, the up-down bar goes down so that the folded portion of the flexible display panel does not contact the up-down bar. It is an object of the present invention to provide an in-folding type hinge unit on which a flexible display panel is installed, characterized in that when the panel of the smartphone is unfolded, the up-down bar rises up and returns to the original position to be located at the same height as the upper panel.

In order to achieve the above object, as a'in-folding type hinge portion in which a flexible display panel according to the present invention is installed, and in'in-folding-type hinge portion in which a flexible display panel is installed,

Hinge base 30; An up-down bar 20 moving up and down with respect to the upper surface of the hinge base; The up-down shaft 50, in which the compression spring 52 is fitted, penetrates from the bottom to the top of the hinge base 30, and the lower end of the compression spring 52 and the up-down shaft 50 is inside the hinge base 30. Located only,

Only the end of the upper end of the up-down shaft 50 is protruded above the upper surface of the through-shaped hinge base 30 and is coupled with the up-down bar 20,

The up-down bar 20 is configured to receive a force so as to be in close contact with the surface of the hinge base 30 while receiving an elastic force by the compression spring 52,

The hinge base 30 includes a pair of first rotation supports 40, a pair of second rotation supports 60 and a pair of third rotation supports 70,

A rotation protrusion 41 is formed to protrude in a circular arc shape on the side of the first rotation support 40,

The pair of second rotation supports 60 facing each other is connected to the elastic body 64,

Each of the pair of second rotation supports (60) is provided with a guide rail (62), and the protruding guide portion (65) of the elastic body (64) is a guide rail (62) of the second rotation support (60). ) Is configured to be moved by being inserted into each,

The elastic body 64 is characterized in that when the pair of second rotation supports 60 according to the present invention rotates in different directions at the same time, it is characterized in that the elastic force is applied to fold or unfold each other,

The third rotation support has a 4-axis gear unit,

The four-axis gear unit is moved by being fitted with two gear wheels 74 in which gears are meshed with each other, a gear type guide bar 76 that is engaged with each of the gear wheels 74 and the protrusion of the gear type guide bar 76 The moving guide groove 72 is configured,

In the four-axis gear unit, the two gear wheels 74 that mesh with each other and the gear-type guide plate 76 that engages with each of the gear wheels 74 are inserted into the shaft fixed to the support body 68 to rotate. It characterized in that it is configured to do.

According to the in-folding type hinge unit on which the flexible display panel is installed according to the present invention, an up-down bar is installed on the top of the hinge base installed at the foldable part of the foldable smartphone, so that the up-down bar is in the folded state of the foldable smartphone. As it goes down, the folded portion of the flexible display panel does not come into contact with the up-down bar, thereby preventing damage to the folded portion of the flexible display panel.

In addition, when the panel of the smartphone is unfolded, the up-down bar rises up and returns to its original position, and is located at the same height as the upper panel, which prevents damage to the flexible display panel even when the user presses the fold in the center of the smartphone. There is a remarkable effect.

In addition, a pair of upper panels that rotate to be folded or unfolded are subjected to elastic force by an elastic body such as a torsion spring, so that the foldable smartphone is semi-automatically folded or unfolded when the user unfolds or folds the foldable smartphone. There is a remarkable effect.

1 is a perspective view illustrating a state in which an upper panel on which an in-folding type hinge part is mounted is separated from a lower panel on which a flexible display panel according to the present invention is installed.

2 is a perspective view showing a state in which an in-folding type hinge part on which a flexible display panel is installed according to the present invention is separated from an upper panel.

3 is an exploded perspective view of a state in which an up-down bar is separated from a hinge base in an in-folding type hinge portion in which a flexible display panel according to the present invention is installed.

4 is an exploded perspective view of an in-folding type hinge part on which a flexible display panel according to the present invention is installed.

FIG. 5 is an exploded perspective view in which the first rotation support is exploded in the exploded perspective view shown in FIG. 4.

6 is a perspective view showing a state in which the first rotation support shown in FIG. 5 is assembled.

7 is an exploded perspective view and an assembled perspective view of an elastic drive unit and a four-axis gear unit in an in-folding type hinge unit in which a flexible display panel according to the present invention is installed.

8 is an exploded perspective view of an elastic driving unit and a four-axis gear unit in FIG. 7.

9 is an exploded perspective view of a four-axis gear unit according to the present invention shown in FIG. 8.

10 is a front view showing a section A from a guide rail of an in-folding type hinge portion on which a flexible display panel according to the present invention is installed.

11 is a front view showing section B from a guide rail of an in-folding type hinge portion on which a flexible display panel according to the present invention is installed.

12 is a front view showing a section C from a guide rail of an in-folding type hinge part on which a flexible display panel according to the present invention is installed.

13 is a perspective view showing a state in which the guide protrusion of the elastic actuator according to the present invention is positioned in section A shown in FIG. 10.

FIG. 14 is a view showing the unfolded panel connected to the in-folding type hinge portion on which the flexible display panel according to the present invention is installed when the guide protrusion of the elastic actuator according to the present invention is located in section A shown in FIG. 10 It is a perspective view.

15 is a perspective view showing a state in which the guide protrusion of the elastic actuator according to the present invention is located in section B shown in FIG. 11.

FIG. 16 is a view illustrating a folded panel connected to an in-folding type hinge portion on which a flexible display panel according to the present invention is installed when the guide protrusion of the elastic actuator according to the present invention is located in section B shown in FIG. It is a perspective view.

17 is a perspective view showing a state in which the guide protrusion of the elastic driving body according to the present invention is located at the lower end of section B shown in FIG. 11.

FIG. 18 is a 3/4 view of a panel connected to the'in-folding type hinge part' on which the flexible display panel according to the present invention is installed when the guide protrusion of the elastic actuator according to the present invention is located at the lower end of section B shown in FIG. It is a perspective view showing a folded state.

19 is a perspective view showing a state in which the guide protrusion of the elastic driving body according to the present invention is located in section C shown in FIG. 12.

FIG. 20 is a view showing a state in which the panel connected to the in-folding type hinge portion on which the flexible display panel according to the present invention is installed is folded when the guide protrusion of the elastic actuator according to the present invention is located in section C shown in FIG. 12 It is a perspective view.

FIG. 21 is a front view showing section A from a guide rail according to another exemplary embodiment from an in-folding type hinge portion on which a flexible display panel according to the present invention is installed.

22 is a front view showing a section B from a guide rail according to another exemplary embodiment from an in-folding type hinge portion on which a flexible display panel according to the present invention is installed.

23 is a perspective view showing a folded state of the elastic driving part when the guide protrusion of the elastic driving part is located in section A in the guide rail of another embodiment in the'in-folding type hinge part in which the flexible display panel is installed according to the present invention.

24 is an elasticity when the guide protrusion of the elastic driving part in the guide rail of another embodiment in the'in-folding type hinge part in which the flexible display panel according to the present invention is installed' is located at a portion where the end point of section A and the start point of section B overlap It is a perspective view showing the unfolded state of the driving unit.

25 is a perspective view showing a state in which the guide protrusion of the elastic actuator is located at the end of section B in the guide rail of another embodiment in the'in-folding type hinge portion in which the flexible display panel is installed according to the present invention, and the elastic driving portion is folded. .

26 is a cross-sectional view showing the movement of a four-axis gear unit in an in-folding type hinge part in which a flexible display panel is installed according to the present invention.

27 is a cross-sectional view showing a state in which the guide protrusion of the four-axis gear unit shown in FIG. 26 moves.

28 is a cross-sectional view illustrating a configuration in which an up-down bar is moved by a first rotation support in an in-folding type hinge portion in which a flexible display panel is installed according to the present invention.

29 is a cross-sectional view showing a configuration in which an up-down bar moves up and down by a contact portion of a second rotation support according to the present invention in the'in-folding type hinge portion in which the flexible display panel is installed according to the present invention.

1 is a perspective view illustrating a state in which an upper panel on which an in-folding type hinge part is mounted is separated from a lower panel on which a flexible display panel according to the present invention is installed. 2 is a perspective view showing a state in which the'in-folding type hinge part' on which the flexible display panel is installed according to the present invention is separated from a pair of upper panels.

1 and 2, a pair of upper panels 10 according to the present invention are connected to each other by an in-folding type hinge part, and a pair of upper panels 10 according to the present invention are connected to each other by an in-folding type hinge part. It is configured to cover the bottom of the upper panel 10 connected to each other.

The hinge base 31 of the present invention is configured to be covered by the hinge part cover 31.

Referring to FIG. 3, the up-down bar 20 moving up and down with respect to the upper surface of the hinge base 30 of the present invention in the'in-folding type hinge portion in which the flexible display panel is installed according to the present invention is installed. 30) is disposed along the center of the longitudinal direction, and the up-down shaft 50 to which the compression spring 52 is fitted penetrates from the bottom of the hinge base 30 to the bottom of the compression spring 52 and the up-down shaft 50 The portion is located only inside the hinge base 30, and only the end of the upper end of the up-down shaft 50 protrudes above the upper surface of the hinge base 30 through penetration, and is combined with the up-down bar 20 of the present invention.

The up-down bar 20 of the present invention is configured to receive a force so as to be in close contact with the surface of the hinge base 30 while receiving an elastic force by the compression spring 52.

Referring to FIG. 4, a first pair of rotating supports 40 according to the present invention is shown separated from the hinge base 30. On the side of the first rotation support 40, a rotation protrusion 41 is formed to protrude in a circular arc shape.

Next to the pair of first rotary support 40 of the present invention, a pair of second rotary support 60 and a pair of third rotary support 70 are assembled to be coupled to the hinge base 30 of the present invention. .

A pair of first rotation support 40, a pair of second rotation support 60 and a pair of third rotation support 70 according to the present invention are configured to be coupled to the upper panel 10, respectively. (See Fig. 2)

FIG. 5 is an exploded perspective view in which the first rotation support is exploded in the exploded perspective view shown in FIG. 4. 6 is a perspective view showing a state in which the first rotation support shown in FIG. 5 is assembled.

5 and 6, a pair of first rotation support 40 according to the present invention is assembled to be supported so that it can be rotated by being inserted into the rotation groove 43 of the fixed support 42, and the hinge base of the present invention It is configured to bind to (30).

The rotation protrusion 41 formed on the side of the first rotation support 40 of the present invention is fitted into the rotation groove 43 of the fixed support 42, and the rotation support 40 along the rotation groove 43 of the present invention Is configured to rotate.

7 is an exploded perspective view and an assembled perspective view of an elastic drive unit and a four-axis gear unit in an in-folding type hinge unit in which a flexible display panel according to the present invention is installed. 8 is an exploded perspective view of an elastic driving unit and a four-axis gear unit in FIG. 7. 9 is an exploded perspective view of the four-axis gear unit shown in FIG. 8.

7 to 9, the elastic drive unit according to the present invention is composed of a pair of second rotation support 60 and the elastic body 64 facing each other.

A guide rail 62 is formed on each of the pair of second rotation supports 60 according to the present invention, and the protruding guide portion 65 of the elastic body 64 such as a torsion spring is the second rotation support 60 It is configured to be movable by being fitted to each of the guide rails 62 of the.

The elastic body 64 according to the present invention serves to apply an elastic force to fold or unfold each other when the pair of second rotation supports 60 according to the present invention rotate in different directions at the same time.

The four-axis gear unit of the present invention includes two gear wheels 74 in which gears are meshed with each other, a gear-type guide base 76 in which gears are engaged, and a gear-type guide base 76 of the present invention. It is composed of a third rotation support (70) is configured with a moving guide groove (72) to which the protrusion is inserted and moved.

In the four-axis gear part of the present invention, two gear wheels 74 in which gears are meshed with each other, and a gear-type guide base 76 in which gears are engaged with each other are attached to the shaft fixed to the support body 68. It is configured to be inserted and rotated.

9 is an exploded view of the four-axis gear unit of the present invention as viewed from above.

10 is a front view showing a section A from a guide rail of an in-folding type hinge portion on which a flexible display panel according to the present invention is installed. 11 is a front view showing section B from a guide rail of an in-folding type hinge portion on which a flexible display panel according to the present invention is installed. 12 is a front view showing a section C from a guide rail of an in-folding type hinge part on which a flexible display panel according to the present invention is installed.

Referring to Figures 10 to 12, section A of the guide rail 62 formed on the side of the second rotation support 60 of the present invention is a pair of second rotation support 60 according to the present invention by the elastic body 64. ) Is a section in which elastic force is applied in the unfolding direction.

Section B according to the present invention is a section in which force is applied so that the pair of second rotation supports 60 according to the present invention is unfolded or folded by the user, and section C according to the present invention is a pair of second rotation supports according to the present invention. It is a section in which elastic force is applied to maintain the rotation support 60 in a folded state.

13 is a perspective view showing a state in which the guide portion of the elastic body according to the present invention is located in section A shown in FIG. 10. FIG. 14 is a view showing the unfolded panel connected to the in-folding type hinge portion on which the flexible display panel according to the present invention is installed when the guide protrusion of the elastic actuator according to the present invention is located in section A shown in FIG. 10 It is a perspective view.

13 and 14, when the guide portion 65 of the elastic body 64 of the present invention is located in the section A of the guide rail 62, a pair of the second rotation support 60 of the present invention is unfolded. An elastic force is applied to keep it.

15 is a perspective view showing a state in which the guide protrusion of the elastic actuator according to the present invention is located in section B shown in FIG. 11. FIG. 16 is a view illustrating a folded panel connected to an in-folding type hinge portion on which a flexible display panel according to the present invention is installed when the guide protrusion of the elastic actuator according to the present invention is located in section B shown in FIG. It is a perspective view. 17 is a perspective view showing a state in which the guide protrusion of the elastic driving body according to the present invention is located at the lower end of section B shown in FIG. 11. FIG. 18 is a 3/4 view of a panel connected to the'in-folding type hinge part' on which the flexible display panel according to the present invention is installed when the guide protrusion of the elastic actuator according to the present invention is located at the lower end of section B shown in FIG. It is a perspective view showing a folded state.

15 to 18, when the guide portion 65 of the elastic body 64 of the present invention is located at the starting point of the section B, the elastic force in the direction in which the second pair of rotating supports 60 of the present invention is spread out. This will not be applied.

In the state where the guide portion 65 of the elastic body 64 of the present invention is located in the section B, the pair of the upper panel 10 and the lower panel 20 of the present invention is folded or unfolded by the user's force. Is done.

19 is a perspective view showing a state in which the guide protrusion of the elastic driving body according to the present invention is located in section C shown in FIG. 12. FIG. 20 is a view showing that when the guide protrusion of the elastic driving body according to the present invention is located in section C shown in FIG. 12, the upper panel connected to the'in-folding type hinge part' on which the flexible display panel according to the present invention is installed is completely folded. It is a perspective view shown.

19 and 20, when the guide portion 65 of the elastic body 64 of the present invention is positioned in the section C according to the present invention, a pair of the second rotation support 60 according to the present invention is folded. An elastic force is applied to maintain it, and the folded upper and

lower panels

10 and 12 are maintained in a folded state so that they do not spread by themselves.

FIG. 21 is a front view showing section A from a guide rail according to another exemplary embodiment from an in-folding type hinge portion on which a flexible display panel according to the present invention is installed. 22 is a front view showing a section B from a guide rail according to another exemplary embodiment from an in-folding type hinge portion on which a flexible display panel according to the present invention is installed.

21 and 22, the guide portion 65 of the elastic body 64 is positioned in the section A in the guide rail 63 of another embodiment in the in-folding type hinge portion in which the flexible display panel according to the present invention is installed. During this, an elastic force acts in the direction in which the pair of second rotation supports 60 are unfolded.

In addition, while the guide portion 65 of the elastic body 64 is positioned in the section B of the guide rail 63 of the present invention, an elastic force acts in the direction in which the pair of second rotation supports 60 is folded.

Referring to Figure 23, in the case where the protruding guide portion 65 of the elastic body 64 is located at the end of the section A in the guide rail 63 of another embodiment of the second rotation support 60 of the present invention. The elastic force is applied to keep the 2 rotation support 60 and the third rotation support 70 in an unfolded state.

Referring to FIG. 24, a user applies a force to fold the second rotation support 60 and the third rotation support 70, and the second rotation support 60 passes through the section A in the guide rail 63 of another embodiment. When the protruding guide portion 65 of the elastic body 64 is positioned at the starting point of the section, a pair of the second rotation support 60 and the third rotation support 70 according to the present invention by the elastic force of the elastic body 64 Is forced to fold together.

Referring to FIG. 25, when the guide portion 65 of the elastic body 64 of the present invention is positioned at the end of the section B according to the present invention, a pair of the second rotation support 60 according to the present invention maintains a folded state. The elastic force is applied so that the folded upper and

lower panels

26 is a cross-sectional view showing the movement of a four-axis gear unit in an in-folding type hinge part in which a flexible display panel is installed according to the present invention. 27 is a cross-sectional view showing a state in which the guide protrusion of the four-axis gear unit shown in FIG. 26 moves.

Referring to FIGS. 26 and 27, when the pair of upper panels of the present invention are completely folded because the two gear wheels 74 are geared together in the four-axis gear unit according to the present invention (part (a) in the drawing) In the present invention, a free space equal to the width of the up-down bar 20 is formed.

When the upper panel 10 of the present invention is in a folded state, the flexible display panel 4 in which information such as moving pictures and images is displayed in a free space equal to the width of the up-down bar 20 of the present invention is in a folded state. Will be placed.

In addition, since the two gear wheels 74 of the present invention are gear-coupled to each other, the thickness of the smartphone is not required to increase the diameter of the gear wheels 74 and the gear-type guide base 76. It is possible to configure thinner.

When the pair of upper panels 10 according to the present invention is unfolded, the pair of third rotation supports 70 is also unfolded at the same time, and the contact portion 140 is in close contact with the bottom surface of the up-down bar 20 and the up-down portion 20 is lifted. The height of the upper surface of the upper bar 22 installed on the up-down part 20 by moving in the direction is the same as the height of the upper surface of the upper panel 10.

28 is a cross-sectional view showing a configuration in which an up-down bar is moved by a first rotation support to an in-folding type hinge portion on which a flexible display panel is installed according to the present invention. 29 is a cross-sectional view showing a configuration in which an up-down bar moves up and down by a contact portion of a second rotation support according to the present invention in the'in-folding type hinge portion in which the flexible display panel is installed according to the present invention.

Referring to FIGS. 28 and 29, a pair of the first rotation support 40, the second rotation support 60, and the third rotation support 70, respectively, while rotating in the direction in which a pair of upper panels 10 are spread. Is rotated in the same direction at the same time, and the contact portion 140 of each rotation support is configured to push up the side portion of the bottom surface of the up-down bar 20 according to the present invention.

When the pair of upper panels 10 is unfolded 180 degrees, the upper surface of the upper bar 22 installed on the up-down bar 20 is configured to be the same height as the upper surface of the upper panel 10.

The flexible display panel 4 on which information such as moving pictures and images is displayed is attached to a pair of upper panels 10 and supported by an upper bar 22 coupled to the upper surface of the up-down bar 20 located in the middle.

When a user who uses a foldable display device such as a smart phone installed with the present invention unfolds and uses the pair of upper panels 10, the flexible display panel 4 of the foldable portion of the foldable display device is the upper panel 10 It is supported by the upper surface of the upper bar 22 of the up-down bar 20 having the same height as the upper surface of. (Refer to drawing (C))

Although the preferred embodiment of the present invention has been described above using specific terms, such a technique is for illustration only, and it is obvious that various changes and changes can be made without departing from the spirit and scope of the following claims. It's work. These modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be said to fall within the scope of the claims appended to the present invention.

Claims

In the `in-folding type hinge part where the flexible display panel is installed,

Hinge base 30;

An up-down bar 20 moving up and down with respect to the upper surface of the hinge base;

The up-down shaft 50, in which the compression spring 52 is fitted, penetrates from the bottom to the top of the hinge base 30, and the lower end of the compression spring 52 and the up-down shaft 50 is inside the hinge base 30. Located only,

Only the end of the upper end of the up-down shaft 50 is protruded above the upper surface of the through-shaped hinge base 30 and is coupled with the up-down bar 20,

The up-down bar (20) is configured to receive a force so as to be in close contact with the surface of the hinge base (30) while receiving an elastic force by the compression spring (52).
The method of claim 1,

The hinge base 30 includes a pair of first rotation supports 40, a pair of second rotation supports 60 and a pair of third rotation supports 70,

An in-folding type hinge part on which a flexible display panel is installed, characterized in that a rotation protrusion 41 protrudes from a side surface of the first rotation support 40 in a circular arc shape.
The method of claim 2,

The pair of second rotation supports 60 facing each other is connected to the elastic body 64,

Each of the pair of second rotation supports (60) is provided with a guide rail (62), and the protruding guide portion (65) of the elastic body (64) is a guide rail (62) of the second rotation support (60). ) Is configured to be moved by being inserted into each,

The elastic body 64 is an in-folding type in which a flexible display panel is installed, characterized in that when a pair of second rotation supports 60 according to the present invention rotates simultaneously in different directions, elastic force is applied to fold or unfold each other. Hinge part.
The method of claim 2,

The third rotation support has a 4-axis gear unit,

The four-axis gear unit is moved by being fitted with two gear wheels 74 in which gears are meshed with each other, a gear type guide bar 76 that is engaged with each of the gear wheels 74 and the protrusion of the gear type guide bar 76 The moving guide groove 72 is configured,

In the four-axis gear unit, the two gear wheels 74 that mesh with each other and the gear-type guide plate 76 that engages with each of the gear wheels 74 are inserted into the shaft fixed to the support body 68 to rotate. An in-folding type hinge unit on which a flexible display panel is installed, characterized in that it is configured to perform.