TWI739619B - Display device - Google Patents

Abstract

A display device is provided, which has a stacked-state and an expanded-state. The display device includes a first body, a second body, a hinge module and a tightening module. The hinge module includes a first hinge and a second hinge, which are disposed in the first body and the second body respectively. Both ends of a tightening member of the tightening module are disposed in the first body and the second body respectively. Wherein, in the stacked-state, a first bottom-surface of the first body is located on a second top-surface of the second body so as to the tightening member has a first turning portion and a second turning portion are formed on both sides of the display device respectively. In the expanded-state, the display surfaces of the first body and the second body are on the same plane, and the first body rotates relative to the second body by the hinge module.

Description

Display device

The present invention relates to the technical field of a display device. Specifically, the present invention relates to a display device having a folded state and an expanded state.

In the existing foldable mobile phone or tablet computer, a bendable display element is arranged on two bodies. When the two bodies are unfolded, the user can use the complete display surface of the display element, and when the two bodies are folded and folded, the display element will bend accordingly, so that the user can use part of the display element Display surface. In this way, the foldable mobile phone or tablet computer increases the flexibility in use.

However, in this way of arranging a bendable display element on two bodies, after many times of unfolding and folding, the display element will produce material fatigue, which will cause the display element to be unable to be completely attached at the bending part. Fitting to the body, or, the display element may cause damage and other problems at the bend.

In summary, the inventor of the present invention has designed a display device to improve on the shortcomings of the existing technology, thereby enhancing the industrial application and utilization.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a display device to improve the above-mentioned problems of a foldable or foldable display device.

Based on the above objective, the present invention provides a display device, which has a folded state and an expanded state. The display device includes a first body, a second body, a rotating shaft module, and a tightening module. The first machine system includes a first top surface, a first bottom surface opposite to the first top surface, and a first side surface connecting the first top surface and the first bottom surface. The second body includes a second top surface, a second bottom surface opposite to the second top surface, and a second side surface connecting the second top surface and the second top surface; in the folded state, the first bottom surface of the first body is located at the first bottom surface. The second top surface of the two bodies, and the first side surface and the second side surface are respectively located on opposite sides of the display device. The rotating shaft module includes a first rotating shaft member and a second rotating shaft member; the first rotating shaft member is arranged inside the first body from the first side surface, and the second rotating shaft member is arranged inside the second body from the second side surface. In the unfolded state, the first rotating shaft member is pivotally connected to the second rotating shaft member. The tightening module includes a tightening piece; the tightening piece has a first end and a second end opposite to each other, and the first end is arranged on the first body, and the second end is arranged on the second body. Wherein, in the collapsed state, the position of the tightening member corresponds to the first side surface to form a first turning portion, and the position corresponds to the second side surface to form a second turning portion; in the unfolded state, the tightening member is substantially Planar.

Preferably, the tightening module may further include a first pull-back element; the first pull-back element is disposed on the first body and connected to the first end of the tightening member.

Preferably, the first pull-back element may include a fixed pulley set, a movable pulley set, a rope body and an elastic member. The fixed pulley set is arranged along the first direction and fixed on the first top surface. The movable pulley set is pivotally connected to the first top surface, and moves relative to the first top surface along the second direction, and the first direction is substantially perpendicular to the second direction. The two ends of the rope body are respectively fixed to the first end of the tightening member, and the middle section of the rope body is staggered around the fixed pulley block and the movable pulley block. One end of the elastic element is fixed to the first body, and the other end is fixed to the moving pulley block, and the elastic element can be stretched or contracted along the second direction.

Preferably, the first pull-back element may further include a pair of pulley rails and a pair of positioning rails. The pair of pulley tracks are arranged on the first top surface, and the pair of pulley tracks extend along the second direction; wherein the opposite ends of the movable pulley set can be respectively embedded in the pair of pulley tracks, so that the movable pulley set can follow the first The two directions move relative to the pair of pulley tracks. The pair of positioning rails are arranged on the first top surface, and the pair of positioning rails extend along the second direction; wherein the first end of the tightening member has a pair of positioning portions, and the pair of positioning portions can be embedded respectively It is arranged on the pair of positioning rails so that the first end can move along the second direction.

Preferably, the tightening module further includes a second pull-back element, and the second pull-back element is disposed on the second body and connected to the second end of the tightening member.

Preferably, the second pull-back element further includes a fixed pulley set, a movable pulley set, a rope body, and an elastic member. The fixed pulley set is arranged along a first direction and fixed on the second top surface. The movable pulley set is pivotally connected to the second top surface, and moves relative to the second top surface along a second direction, and the first direction is substantially perpendicular to the second direction. The two ends of the rope body are respectively fixed to the second end of the tightening member, and the middle section of the rope body is staggered around the fixed pulley group and the movable pulley group. One end of the elastic element is fixed to the second body, and the other end is fixed to the moving pulley block, and the elastic element can be stretched or contracted along the second direction.

Preferably, the second pull-back element further includes a pair of pulley tracks and a pair of positioning tracks. The pair of pulley tracks are arranged on the second top surface, and the pair of pulley tracks extend along the second direction. The opposite ends of the movable pulley set can be respectively embedded in the pair of pulley tracks, so that the movable pulley set can follow Move in the second direction relative to the pulley track. The pair of positioning rails are arranged on the second top surface, and the pair of positioning rails extend along the second direction, wherein the second end of the tightening member has a pair of positioning portions, and the pair of positioning portions can be embedded respectively It is arranged on the pair of positioning rails so that the first end can move along the second direction.

Preferably, the first rotating shaft component includes a fastener and a resetting component, the resetting component is disposed on the fastener, and the second rotating shaft component includes a buckling groove and a rotating shaft element, and the rotating shaft component can be pivoted according to a third direction. In the folded state, the fastener and the buckling groove are engaged with each other, and the third direction is parallel to the first side surface or the second side surface.

Preferably, the restoring member has a spring portion and a first extension portion and a second extension portion respectively located on both sides of the spring portion. The first extension portion is adjacent to the fastener, and the second extension portion is located in the first body.

Preferably, the display device further includes a first display element and a second display element. The first display element is disposed on the first top surface of the first body to form a first display surface, and the second display element is disposed on the The second top surface of the second body forms a second display surface, wherein in the unfolded state, the first display surface is substantially flush with the second display surface.

The display device of the present invention can at least have the following advantages: (1) In the display device of the present invention, the first body and the second body are respectively connected by the tightening module, so that the first body and the second body can reach the folded state stacked up and down, and the first body and the second body The top surface of the body is flush with the unfolded state. Thereby, the display device of the present invention can use the display surface of the first body in the folded state, or simultaneously use the display surfaces of the first body and the second body in the unfolded state. (2) The display device of the present invention, through the setting of the hinge module, and the first body of the present invention can rotate relative to the second body when the display device of the present invention is in the unfolded state, so that the display device of the present invention has better performance. Practicality.

In order to understand the technical features, content and advantages of the present invention as well as the effects that can be achieved, the present invention is described in detail with the accompanying drawings and in the form of embodiment expressions as follows, and the figures used therein are only For the purpose of illustration and auxiliary description, it is not necessarily the true scale and precise configuration after the implementation of the present invention. Therefore, the proportion and configuration relationship of the attached drawings should not be interpreted, and the scope of rights of the present invention in actual implementation should not be interpreted. Narrate.

In the drawings, for the sake of clarity, the thickness or width of elements such as panels are enlarged. Throughout the specification, the same reference numerals denote the same elements. It will be understood that when an element is referred to as being “on” or “connected to” or “disposed on” another element, it can be directly on or connected to the other element, or the intermediate element may also be exist. Conversely, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements. As used herein, "connection" or "setting" can be a fixed or detachable connection or setting. In addition, if the terms "first", "second", and "third" are used for descriptive purposes only, they cannot be understood as indicating or implying relative importance or their sequential relationship.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the meanings commonly understood by ordinary knowledge in the technical field to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies and the present invention, and will not be interpreted as idealized or excessive The formal meaning, unless explicitly defined as such in this article.

Please also refer to FIGS. 1 to 4, which are related schematic diagrams of the folded state and the expanded state of the first embodiment of the display device of the present invention. Among them, the display device of the present invention may be a portable electronic device, such as a smart phone, a tablet computer, and the like.

As shown in the figure, the display device 1 of the present invention includes a first body 10, a second body 20, a first display element 30, a second display element 40, a hinge module 50, and a tightening module 60. The first body 10 includes a first top surface 11, a first bottom surface 12 and a first side surface 13. The first top surface 11 is opposite to the first bottom surface 12, and the first side surface 13 is connected between the first top surface 11 and the first bottom surface 12. Similarly, the second body 20 includes a second top surface 21, a second bottom surface 22 and a second side surface 23. The second top surface 21 is opposite to the second bottom surface 22, and the second side surface 23 is connected between the second top surface 21 and the second bottom surface 22. The first display element 30 is disposed on the first top surface 11 of the first body 10 to form a first display surface 31, and the second display element 40 is disposed on the second top surface 21 of the second body 20 to form a first display surface. Two display surface 41.

It is worth mentioning that the display device 1 of the present invention has a folded state S1 and an expanded state S2. Furthermore, in the folded state S1, the first bottom surface 12 of the first body 10 is located on the second top surface 21 of the second body 20, and the first side surface 13 and the second side surface 23 are respectively located opposite to the display device 1. On both sides. That is to say, when looking at the first top surface 11 of the first body 10, the first side surface 13 is located on the left side of the first body 10; and when looking at the second top surface 21 of the second body 20, the second side surface 23 It is located on the right side of the second body 20. In the unfolded state S2, the first side surface 13 of the first body 10 is connected to the second side surface 23 of the second body 20, and the first display surface 31 is substantially flush with the second display surface 41; that is, the first display surface 31 It is substantially on the same plane as the second display surface 41. Among them, the first display element 30 and the second display element 40 may be flexible panels, the first display element 30 may have an appropriate curvature on the first side surface 13, and the second display element 40 may have an appropriate curvature on the second side surface 23. Therefore, when the first display surface 31 and the second display surface 41 are substantially on the same plane, the problem of discontinuity at the interface between the two display surfaces can be effectively improved.

In terms of other components, the shaft module 50 includes a first shaft member 51 and a second shaft member 52, and the tightening module 60 includes a tightening member 61.

Wherein, the first rotating shaft member 51 is disposed inside the first body 10 from the first side surface 13, and the second rotating shaft member 52 is disposed inside the second body 20 from the second side surface 23. With the above configuration, in the unfolded state S2, the first side surface 13 is connected to the second side surface 23, so that the first shaft member 51 is pivotally connected to the second shaft member 52, so that the first body 10 can face each other through the shaft module 50 The second body 20 rotates.

The tightening member 61 may be an extremely thin steel film, which may have a first end 611 and a second end 612 opposite to each other. The first end 611 is disposed inside the first body 10, and the second end 612 is disposed In the inside of the second body 20. Since the first body 10 is located on the second body 20 in the folded state S1, the tightening member 61 will correspondingly form a first turning portion 613 and a second turning portion 614. The first turning portion 613 is formed at a position corresponding to the first side surface 13, and the second turning portion 614 is formed at a position corresponding to the second side surface 23. In addition, since the first body 10 is connected to the side of the second body 20 in the unfolded state S2, the tightening member 61 will be substantially flat.

It is worth mentioning that in addition to the tightening component 61, the tightening module 60 may include a first pull-back element 62 and a second pull-back element 63. The first pull-back element 62 is arranged on the first body 10 and connected to the first end 611 of the tightening member 61, and the second pull-back element 63 is arranged on the second body 20 and connected to the first end 611 of the tightening member 61. Two ends 612. Among them, the first pull-back element 62 and the second pull-back element 63 may have elements such as springs, so that when the length of the tightening member 61 remains unchanged, the elements such as the spring will follow when the retracted state S1 is Stretching, and shrinking in the unfolded state S2.

Incidentally, although the above description has the first pull-back element 62 and the second pull-back element 63, in actual use, considering factors such as cost, only the first pull-back element 62 may be provided, or Only the second pull-back element 63 is provided; therefore, the two pull-back elements in this embodiment should not be used as a limitation.

The following will further explain the above. Please refer to FIG. 5, which is a schematic structural diagram of the tightening module of the first embodiment of the display device of the present invention.

As shown in the figure, in addition to the tightening component 61, the tightening module 60 can further include a first pull-back element 62. The first pull-back element 62 is disposed on the first body 10 and connected to the first end 611 of the tightening member 61 to provide a pulling force of the tightening member 61.

Furthermore, the first pull-back element 62 includes a first fixed pulley group 621, a first movable pulley group 622, a first rope body 623 and a first elastic member 624. The first fixed pulley set 621 is arranged along the first direction D1 and fixed to the first top surface 11, and the first direction D1 may be a direction parallel to the first side surface 13 or the second side surface 23. The first movable pulley group 622 is pivotally connected to the first top surface 11 and moves relative to the first top surface 11 along the second direction D2, and the first direction D1 and the second direction D2 are substantially perpendicular to each other. Two ends of the first rope body 623 are respectively fixed to the first end 611 of the tightening member 61, and the middle section of the first rope body 623 is staggered around the first fixed pulley set 621 and the first movable pulley set 622. One end of the first elastic member 624 is fixed to the first body 10, and the other end is fixed to the first movable pulley group 622, and the first elastic member 624 can be stretched or contracted along the second direction D2.

When the display device 1 is in the folded state S1, the tightening member 61 can be bent, thereby generating a force that causes the first end 611 of the tightening member 61 to move outward from the inside of the first body 10. At this time, the first end 611 of the tightening member 61 will pull the first rope body 623 to indirectly cause the first movable pulley group 622 to be displaced. Wherein, the first movable pulley group 622 is displaced from one end of the first elastic member 624 to the other end, so that the first elastic member 624 is stretched. In this case, because one end of the first elastic member 624 is fixed to the first body 10 and the other end is fixed to the first movable pulley 622, the first elastic member 624 generates a first elastic force based on the elastic restoring force. The force from the other end of the member 624 toward one end pulls the first movable pulley group 622 back, and indirectly pulls back the first end 611 of the tightening member 61 together.

Through the above-mentioned structural configuration, when the display device 1 is in the unfolded state S2, the tightening module 60 can appropriately make the first body 10 and the second body 20 abut against each other, thereby increasing the first display surface 31 and the second body 20 in the unfolded state S2. The second display surface 41 is substantially on the same plane for stability in use.

Please refer to FIGS. 6 and 7 together, which are a schematic diagram of the structure of the hinge module of the first embodiment of the display device of the present invention and a schematic diagram of the state change of the display device.

As shown in the figure, for the details of the shaft module 50, the shaft module 50 includes a first shaft member 51 and a second shaft member 52, and the first shaft member 51 includes a fastener 511 and a reset member 512, and The second shaft member 52 includes a buckling groove 521 and a shaft element 522. Wherein, the fastener 511 can be made of plastic or metal material, which is substantially a long strip structure perpendicular to the first side surface 13, and the middle section of the fastener 511 can be pivoted inside the first body 10.

In addition, the first end 5111 of the fastener 511 is provided with a buckling portion 5112, and the second end 5113 of the fastener 511 abuts against the inside of the first body 10. The reset member 512 is arranged in the middle section of the fastener 511 to drive the fastener 511 to reset. In addition, the second rotating shaft member 52 includes a buckling groove 521 and a rotating shaft element 522. The buckling groove 521 is provided at one end of the rotating shaft element 522, and the rotating shaft element 522 can rotate according to a third direction as the axis. In this embodiment, the third direction is parallel to the first side 13 or the second side 23. The direction, that is, the third direction is the first direction D1.

Furthermore, the restoring member 512 has a spring portion 5121, a first extension portion 5122, and a second extension portion 5123. Wherein, the first extension portion 5122 and the second extension portion 5123 are respectively connected to two sides of the spring portion 5121. That is, the first extension portion 5122 is located at the first end 5111, the second extension portion 5123 is located at the second end 5113, and the first extension portion 5122 and the second extension portion 5123 are located at two ends of the fastener 511, respectively. side. Thereby, when the first side surface 13 is connected to the second side surface 23, the restoring member 512 will generate a force to make the buckling portion 5112 engage with the buckling groove 521.

Preferably, the spring portion 5121, the first extension portion 5122 and the second extension portion 5123 can be made in an integral manner, and the restoring member 512 can preferably be stainless steel, spring steel, beryllium copper, phosphor bronze, or brass. Such materials are often used by those with ordinary knowledge in the technical field when selecting materials for springs.

With the above configuration, in the unfolded state S2, the first side surface 13 is connected to the second side surface 23, and the buckle 511 and the buckle groove 521 are engaged with each other (that is, the buckle portion 5112 and the buckle groove 521 are engaged with each other合), so that the first body 10 can rotate relative to the second body 20 through the shaft element 522.

Please refer to FIG. 8, which is a schematic structural diagram of the first tightening module of the second embodiment of the display device of the present invention. In this embodiment, the configuration and operation of the components that are not specifically described are similar to those in the previous embodiment, and the similarities will not be repeated here.

As shown in the figure, the main difference between this embodiment and the previous embodiments is that the first pull-back element 62 may further include a pair of first pulley rails 625 and a pair of first positioning rails 626. The first pulley track 625 and the first positioning track 626 are arranged on the first top surface 11, and the first pulley track 625 and the first positioning track 626 are arranged along the second direction D2.

The opposite ends of the first movable pulley group 622 can be embedded in the pair of first pulley rails 625 respectively. Thereby, when the first movable pulley group 622 is displaced, it can move stably relative to the pair of first pulley rails 625 along the second direction D2. In addition, the first end 611 of the tightening member 61 may have a pair of positioning portions 613 corresponding to the first positioning rail 626. The pair of positioning portions 613 can be respectively embedded in the pair of first positioning rails 626, so that the first end 611 of the tightening member 61 can move stably along the second direction D2.

Incidentally, the positioning portion 613 may be an integrally formed structure, such as a convex point or a wing portion or a rib portion formed by bending and facing the first positioning rail 626. Of course, the positioning portion 613 can also be an element additionally fixed on the first end 611 of the tightening member 61.

Please refer to FIG. 9, which is a schematic structural diagram of the third embodiment of the display device of the present invention. In this embodiment, the configuration and operation of the components that are not specifically described are similar to those in the previous embodiment, and the similarities will not be repeated here.

As shown in the figure, the main difference between this embodiment and the previous embodiment is that this embodiment includes the first pull-back element 62 of the previous embodiment and the first fixed pulley set included in the first pull-back element 62. 621. The first movable pulley group 622, the first rope body 623, the first elastic member 624, a pair of first pulley rails 625 and a pair of first positioning rails 626, the tightening module 60 further includes a second pull-back element 63. The second pull-back element 63 is disposed on the second body 20 and connected to the second end 612 of the tightening member 61 to further provide a pulling force of the tightening member 61.

The configuration of the second pull-back element 63 is substantially similar to that of the first pull-back element 62. In detail, the second pull-back element 63 includes a second fixed pulley set 631, a second movable pulley set 632, a second rope body 633, a second elastic member 634, a pair of second pulley rails 635, and a pair of second positioning rails 636. . The second fixed pulley group 631 is arranged along the first direction D1 and fixed to the second top surface 21. The second movable pulley group 632 is pivotally connected to the second top surface 21 and moves relative to the second top surface 21 along the second direction D2. Two ends of the second rope body 633 are respectively fixed to the second end 612 of the tightening member 61, and the middle section of the second rope body 633 is staggered around the second fixed pulley set 631 and the second movable pulley set 632. One end of the second elastic member 634 is fixed to the second body 20, and the other end is fixed to the second movable pulley 632, and the second elastic member 634 can be stretched or contracted along the second direction D2.

With the above structural configuration, when the display device 1 is in the folded state S1, the tightening member 61 is bent, thereby generating a force that causes the second end 612 of the tightening member 61 to move outward from the inside of the second body 20. At this time, the second end 612 of the tightening member 61 will pull the second rope body 633 to indirectly cause the second movable pulley group 632 to be displaced. Wherein, the second movable pulley group 632 will be displaced from one end of the second elastic member 634 to the other end, so that the second elastic member 634 is stretched. In this case, since one end of the second elastic member 634 is fixed to the second body 20 and the other end is fixed to the second movable pulley 632, the second elastic member 634 will generate a second elasticity based on the elastic restoring force. The force from the other end of the member 634 toward one end pulls the second movable pulley 632 back, and indirectly pulls the second end 612 of the tightening member 61 together.

In addition, the second pulley track 635 and the second positioning track 636 are arranged on the second top surface 21, and the second pulley track 635 and the second positioning track 636 are arranged along the second direction D2. The opposite ends of the second movable pulley set 632 can be respectively embedded in the pair of second pulley rails 635, so that the second pulley rail 635 can be stably relative to the second pulley rail 635 along the second direction D2. move. The second end 612 of the tightening member 61 has a pair of positioning portions 613 corresponding to the second positioning rail 636, and the pair of positioning portions can be respectively embedded in the pair of second positioning rails 636, so that the second end of the tightening member 61 The two ends 612 can move stably along the second direction D2.

With the above configuration, when the display device 1 is in the unfolded state S2, the tightening module 60 can use the tightening member 61, the first pull-back element 62, and the second pull-back element 63 to properly make the first body 10 and the second body 20 are close to each other, so as to increase the stability in use when the first display surface 31 and the second display surface 41 are substantially on the same plane in the unfolded state S2.

In summary, the display device of the present invention is connected to the first body and the second body by the tightening module, so that the first body and the second body can reach the folded state stacked up and down, and the first body and the second body The top surface of the body is flush with the unfolded state. Thereby, the display device of the present invention can use the display surface of the first body in the folded state, or simultaneously use the display surfaces of the first body and the second body in the unfolded state. In addition, the display device of the present invention uses two display elements, so that even after multiple changes in the folded state and the expanded state, it will not affect or damage the display element. Furthermore, the display device of the present invention is provided with a rotating shaft module, so that the first body of the display device of the present invention can rotate relative to the second body when the display device of the present invention is in the unfolded state, so that the display device of the present invention has better practicability. .

The above descriptions are merely illustrative and not restrictive. Any equivalent modifications or alterations that do not depart from the spirit and scope of the present invention should be included in the scope of the appended patent application.

1: display device 10: The first body 11: The first top surface 12: The first bottom 13: First side 20: The second body 21: The second top surface 22: second bottom 23: second side 30: The first display element 31: The first display surface 40: second display element 41: second display surface 50: Hinge module 51: The first shaft 511: Fastener 5111: first end 5112: buckle part 5113: second end 512: reset piece 5121: Spring part 5122: first extension 5123: second extension 52: The second shaft 521: buckle slot 522: shaft element 60: tightening module 61: tight collection 611: first end 612: second end 613: The first turning point 614: The second turning point 613: Positioning Department 62: The first pull element 621: The first fixed pulley group 622: The first moving pulley block 623: first rope body 624: The first elastic part 625: The first pulley track 626: first positioning track 63: The second pull element 631: The second fixed pulley block 632: second movable pulley group 633: second rope body 634: second elastic part 635: Second pulley track 636: second positioning track D1: First direction D2: second direction S1: Closed state S2: Expanded state

In order to make the above objectives, technical features, and gains after actual implementation more obvious and easy to understand, a more detailed description will be given below with a preferred implementation example to assist the corresponding related drawings. FIG. 1 is a first schematic diagram of the folded state of the first embodiment of the display device of the present invention. FIG. 2 is a second schematic diagram of the folded state of the first embodiment of the display device of the present invention. FIG. 3 is a first schematic diagram of the unfolded state of the first embodiment of the display device of the present invention. FIG. 4 is a second schematic diagram of the unfolded state of the first embodiment of the display device of the present invention. FIG. 5 is a schematic diagram of the structure of the first tightening module of the first embodiment of the display device of the present invention. FIG. 6 is a schematic diagram of the structure of the hinge module of the first embodiment of the display device of the present invention. FIG. 7 is a schematic diagram of state changes of the first embodiment of the display device of the present invention. FIG. 8 is a schematic diagram of the structure of the first tightening module of the second embodiment of the display device of the present invention. FIG. 9 is a schematic structural diagram of the second tightening module of the second embodiment of the display device of the present invention.

1: display device

10: The first body

11: The first top surface

12: The first bottom

13: First side

20: The second body

21: The second top surface

22: second bottom

23: second side

30: The first display element

31: The first display surface

40: second display element

41: second display surface

51: The first shaft

52: The second shaft

60: tightening module

61: tight collection

611: first end

612: second end

613: The first turning point

614: The second turning point

62: The first pull element

63: The second pull element

Claims (10)

A display device has a folded state and an expanded state, and the display device includes: A first body includes a first top surface, a first bottom surface opposite to the first top surface, and a first side surface connecting the first top surface and the first bottom surface; A second body includes a second top surface, a second bottom surface opposite to the second top surface, and a second side surface connecting the second top surface and the second top surface, in the folded state , The first bottom surface of the first body is located on the second top surface of the second body, and the first side surface and the second side surface are respectively located on opposite sides of the display device; A shaft module includes a first shaft member and a second shaft member. The first shaft member is set inside the first body from the first side surface, and the second shaft member is set from the second side surface Inside the second body, in the unfolded state, the first shaft member is pivotally connected to the second shaft member; and A tightening module includes a tightening member having a first end and a second end opposite to each other, wherein the first end is disposed on the first body, and the second end is disposed on the first body. Two bodies, Wherein, in the folded state, the tightening member forms a first turning portion at a position corresponding to the first side surface, and a second turning portion is formed at a position corresponding to the second side surface. In the expanded state , The tightening member is substantially flat. The display device according to claim 1, wherein the tightening module further includes a first pull-back element, and the first pull-back element is disposed on the first body and connected to the first body of the tightening member. end. The display device according to claim 2, wherein the first pull-back element includes: A certain pulley set is arranged along a first direction and fixed on the first top surface; A movable pulley set pivotally connected to the first top surface, and moves relative to the first top surface along a second direction, and the first direction is substantially perpendicular to the second direction; A rope body, both ends of which are respectively fixed to the first end of the tightening member, and the middle part of the rope body is staggered around the fixed pulley block and the movable pulley block; and An elastic member, one end is fixed to the first body, and the other end is fixed to the movable pulley set, and the elastic member can be stretched or contracted along the second direction. The display device according to claim 1, wherein the tightening module further includes a second pull-back element, and the second pull-back element is disposed on the second body and connected to the second tightening member. end. The display device according to claim 4, wherein the second pull-back element further includes: A certain pulley set is arranged along a first direction and fixed on the second top surface; A movable pulley set, pivotally connected to the second top surface, moves relative to the second top surface along a second direction, and the first direction is substantially perpendicular to the second direction; A rope body, both ends of which are respectively fixed to the second end of the tightening member, and the middle part of the rope body is staggered around the fixed pulley block and the movable pulley block; and An elastic member, one end is fixed to the second body, and the other end is fixed to the movable pulley set, and the elastic member can be stretched or contracted along the second direction. The display device according to claim 3, wherein the first pull-back element further includes: A pair of pulley tracks are arranged on the first top surface, and the pair of pulley tracks extend along the second direction, wherein opposite ends of the movable pulley set can be respectively embedded in the pair of pulley tracks, so that the movable pulley set Can move along the second direction relative to the pair of pulley tracks; and A pair of positioning rails are arranged on the first top surface, and the pair of positioning rails extend along the second direction, wherein the first end of the tightening member has a pair of positioning portions, and the pair of positioning portions can They are respectively embedded in the pair of positioning rails, so that the first end can move along the second direction. The display device according to claim 5, wherein the second pull-back element further includes: A pair of pulley tracks are arranged on the second top surface, and the pair of pulley tracks extend along the second direction, wherein opposite ends of the movable pulley set can be respectively embedded in the pair of pulley tracks, so that the movable pulley set Can move along the second direction relative to the pulley track; and A pair of positioning rails are arranged on the second top surface, and the pair of positioning rails extend along the second direction, wherein the second end of the tightening member has a pair of positioning portions, and the pair of positioning portions can They are respectively embedded in the pair of positioning rails, so that the first end can move along the second direction. The display device according to claim 1, wherein the first rotating shaft member includes a fastener and a resetting member, the resetting member is disposed on the fastener, and the second rotating shaft member includes a buckling groove and a rotating shaft element , The rotating shaft element can rotate according to a third direction as the axis, wherein in the unfolded state, the fastener and the buckling groove are engaged with each other, and the third direction is parallel to the first side surface or the first side Two sides. The display device according to claim 8, wherein the restoring member has a spring portion and a first extension portion and a second extension portion respectively located on two sides of the spring portion, and the first extension portion is adjacent to the fastener , The second extension part is located in the first body. The display device according to claim 1, further comprising a first display element and a second display element, the first display element is disposed on the first top surface of the first body to form a first display surface, The second display element is disposed on the second top surface of the second body to form a second display surface, wherein in the unfolded state, the first display surface is substantially flush with the second display surface.

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