KR20140122917A - Display apparatus - Google Patents

Abstract

A display device, according to an embodiment of present invention, comprises a display module, and a variable member for changing a shape of the display module, wherein the variable member includes a deformable member including multi-stable materials. The display device can change the shape of the display module to improve the satisfaction of a viewer, and can easily change the shape of the display module by using a switch driving member.

Description

Display device {DISPLAY APPARATUS}

The present invention relates to a display device, and more particularly, to a display device having an improved structure.

Various types of display devices for realizing images are used. For example, there are various displays such as a liquid crystal display panel, a plasma display panel, and an organic light emitting diode display panel.

2. Description of the Related Art [0002] As the field of use of display devices is gradually expanded, various characteristics are required in various fields of use, and there is an increasing demand for not only characteristics related to displaying images, but also three- In order to satisfy such various demands, studies for improving the structure of the display device in various forms are continuing.

The present invention is intended to provide a display device improved in structure to improve viewing.

A display device according to an embodiment of the present invention includes a display module; And a deformable member for changing the shape of the display module, wherein the deformable member includes a deformable member including a multi-stable material.

The deformable member may include a bi-stable material and may have a first stable state and a second stable state that are switched by snap through.

The bistable composite material includes a core layer, a first layer disposed on one side of the center core material and including a composite material in which the fibers are aligned in one direction, and a second layer disposed on the other side of the core layer, And a second layer arranged side by side in a direction intersecting with the first direction.

The display module maintains a flat state when the deformable member is in the first stable state and the display module can maintain a curved state when the deformable member is in the second stable state.

The deformable member may be formed in a curved shape having one reference axis in the first or second stable state.

The deformable member may be formed convex toward the display module in the first stable state and concave toward the display module in the second stable state.

Wherein the deformable member is formed to be convex in a first direction of the display module from the first stable state toward the display module and in a second direction that intersects the first direction toward the display module in the second stable state As shown in FIG.

Wherein the first direction is the vertical direction of the display module and the second direction is the left and right direction of the display module and the left and right ends of the deformable member are in a position So that the display module can be deformed.

The deformable member may include a plurality of deformed portions each extending along one direction of the display module, and the plurality of deformed portions may be formed spaced apart from each other in another direction intersecting the one direction.

And a connecting member connecting the plurality of deformed portions in the other direction.

The connection member may include first and second connection members corresponding to first and second edges parallel to each other in the display module, and a third connection member corresponding to a central portion of the display module.

And a fixing member for fixing the third connection member and the display module.

And a switching drive member connected to the deformable member to provide a driving force for switching the stable state of the deformable member.

Both end portions of the switching and driving member are fixed to the deformable member and the connection length between the both side ends of the switching and driving member is changed to switch the stable state of the deformable member.

The switching drive member may include a shape memory alloy.

The connection drive member may change the connection length by supply of thermal energy or electric energy.

Wherein the switching drive member includes a first portion positioned on a first surface side of the deformable member and a second portion connected to a second surface side of the deformable member opposite to the first surface, And the second portions may be formed in directions intersecting with each other.

Wherein the first surface of the deformable member is a surface adjacent to the display module, the first portion is formed along a vertical direction of the display module, both side ends of the first portion are fixed to the deformable member, Two portions are formed along the lateral direction of the display module so that both side ends of the second portion can be fixed to the deformable member.

Wherein the deformable member has a first stable state and a second stable state in which the deformable member is switched by a snap-through, the display module maintains the flat state when the deformable member is in the first stable state, Wherein the display module maintains a curved state when the display device is in a stable state and changes a connection length of the first portion when switching from the first stable state to the second stable state, State, the connection length of the second portion can be changed.

A plurality of first portions are connected in series, parallel or series-parallel, a plurality of second portions are provided, and the plurality of second portions are connected in series, parallel or series-parallel Lt; / RTI >

The display device according to the present embodiment can change the shape of the display module so as to improve the satisfaction of the viewer. At this time, it is possible to easily change the shape of the display module by using the deformable member including the multi-stable material and the diverting drive member for providing the driving force for the state telephone.

At this time, the stabilized state can be stably maintained even if the deformable member does not include the structure of the stopper member, the fixing member, and the like including the multistable material. And the first portion and the second portion formed in the direction in which the switching drive member intersects with each other and located on the other surface of the deformable member, so that the stable state of the deformable member can be easily switched. At this time, the shape memory alloy can be used as the switching drive member to easily switch the stable state without noise.

1 is a front perspective view showing a display device according to an embodiment of the present invention.
2 is a rear exploded perspective view showing a part of a display device according to an embodiment of the present invention.
3 is a rear perspective view showing a modified part of a display device according to an embodiment of the present invention.
4 is a perspective view of a deformable member for explaining a shape change of a display device according to an embodiment of the present invention.
5 is a cross-sectional view of a display device for explaining a shape change of a display device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it is needless to say that the present invention is not limited to these embodiments and can be modified into various forms.

In the drawings, the same reference numerals are used for the same or similar parts throughout the specification. In the drawings, the thickness, the width, and the like are enlarged or reduced in order to make the description more clear, and the thickness, width, etc. of the present invention are not limited to those shown in the drawings.

Wherever certain parts of the specification are referred to as "comprising ", the description does not exclude other parts and may include other parts, unless specifically stated otherwise. Also, when a portion of a layer, film, region, plate, or the like is referred to as being "on" another portion, it also includes the case where another portion is located in the middle as well as the other portion. When a portion of a layer, film, region, plate, or the like is referred to as being "directly on" another portion, it means that no other portion is located in the middle.

Hereinafter, a display device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front perspective view showing a display device according to an embodiment of the present invention, and FIG. 2 is a rear exploded perspective view showing a part of a display device according to an embodiment of the present invention. At this time, the illustration of the rear cover is omitted in FIG. 2 for the sake of clarity.

1 and 2, a display device 100 according to the present embodiment includes a display module 10 in which an image is implemented and a deformable member 20 that changes the shape of the display module 10 . And a rear cover 30 covering the rear surface of the display module 10. This will be explained in more detail.

The display device 100 collectively refers to a device that displays data, images, and the like on a screen. The display device 100 may include various kinds of devices such as a television, a computer monitor, a mobile phone, and an e-book.

The display module 10 includes a display panel 12 that substantially implements an image, a support member 14 that is positioned on the rear surface of the display panel 12 and supports the display panel 12, And a panel driver (not shown) that is fixed to the display panel 12 and provides a signal for driving the display panel 12. Further, a frame portion (not shown) that surrounds the edges of the display panel 12 and the support member 14 may be further positioned.

In the present embodiment, the display panel 12 is a panel having various structures and systems capable of implementing an image, and having a flexible characteristic, the shape of which can be changed by the deformable member 20.

For example, the display panel 12 may be an organic light emitting display panel using an organic light emitting diode (OLED). The organic light emitting display panel is a self-luminous display panel that uses a principle that a current is generated in a fluorescent or phosphorescent organic thin film to combine electrons and holes in the organic thin film to generate light. The organic light emitting display panel has various advantages such as a bright and clear image quality, no limitation by the viewing angle, and low power consumption. In particular, since the organic thin film can be produced by laminating it, the flexible property is excellent. However, the present invention is not limited thereto, and various display panels 12 having various structures and systems can be applied.

The support member 14 is disposed on the rear surface of the display panel 12 to support the display panel 12. A panel driving part and a deformable member 20 which are fixed to the rear surface of the supporting member 14 by driving the display panel 12 may be positioned on the rear surface of the supporting member 14. [ The supporting member 14 has a strength that can be supported and fixed to the display panel 12, the panel driving unit and the deformable member 20, and the shape can be changed when the shape of the display panel 12 is changed Elasticity, and the like. In addition, the support member 14 may have a thermal expansion coefficient similar to that of the display panel 12 in order to prevent thermal stress or the like from occurring.

For example, in this embodiment, the support member 14 may comprise a composite material such as reinforced plastic. Composite material is a material that artificially combines two or more kinds of materials to have excellent properties. For example, in this embodiment, the support member 14 may include reinforced plastics such as carbon fiber reinforced plastic (CFRP), glass fiber reinforced plastic (GFRP), and the like. Then, it is possible to have high strength, elasticity, and excellent abrasion resistance by a reinforcing material of various fiber form while having light and flexible characteristics by plastic. The support member 14 may be composed of a single composite material layer or may be formed by stacking a plurality of composite material layers for superior strength.

The support member 14 may be fixed to the rear surface of the display panel 12 using an adhesive (for example, a double-sided tape). However, the present invention is not limited thereto, and the display panel 12 and the supporting member 14 can be fixed by various other methods.

The panel driver fixed to the rear surface of the support member 14 includes a circuit board (not shown) including various wires, elements, and the like to provide a signal for driving the panel. Such a panel driving unit may be fixed to the supporting member 14 by a bracket (not shown) or the like. For example, when the bracket is fixed to the supporting member 14 only at the central portion to change the shape of the display panel 12 The required force can be minimized. However, the present invention is not limited thereto, and it is needless to say that a part or all of the panel driving unit is located outside the display module 10 or the display device 100, and the like. The panel driving unit of the present embodiment may include wiring, devices, and the like for driving the deformable member 20. [

Further, a frame portion (not shown) for protecting the edges of the display panel 12 and the support member 14 may be further positioned. Such a frame portion protects the display panel and the support member 14 while allowing the back cover 30 to be fixed by a fixing member (not shown) or the like. The shape of the frame portion, the fixing structure of the frame portion and the rear cover 30, and the like can be applied in various structures and schemes, and therefore, detailed description thereof will be omitted.

On the rear surface of the display module 10 (more specifically, the support member 14), a deformable member 20 capable of changing the display panel 12 is positioned. In this embodiment, the deformable member 20 includes a deformable member 22 that includes a multi-stable material that is in a stable state in a plurality of shapes. And the deformable member 20 may include a switching driving member 24 connected to the deformable member 22 to provide a driving force for changing the shape of the deformable member 22. [ This will be described in detail.

The deformable member 22 may be composed of a multistable material. In this embodiment, for example, a pair of the deformable member 22 having two stable states (i.e., the first stable state and the second stable state) so that the display module 10 can maintain a planar state or a curved state, A stable material can be provided. At this time, the bistable material is stabilized by switching to the second stable state when a driving force greater than a certain level is applied in the first stable state, and is stabilized by switching to the first stable state when a driving force greater than a certain level is applied in the second safe state And has a snap-through characteristic. Thus, the deformable member 22 can easily switch from a stable state to a stable state when it is necessary to maintain a stable state. In this embodiment, only two stable states are provided to improve the structural stability.

The bistable composite material used as the deformable member 22 is a composite material having a bistable property capable of having two stable states. The composite material is used as a material for the display module 10 so that the shape of the display module 10 can be changed. A variety of materials that can apply force can be used. As the composite material, reinforced plastics such as carbon fiber reinforced plastic and glass fiber reinforced plastic as described above can be used. Then, it is possible to have high strength, elasticity, and excellent abrasion resistance by a reinforcing material of various fiber form while having light and flexible characteristics by plastic.

The bistable composite material includes a core layer, a first layer disposed on one side of the core layer and including a composite material in which the fibers are aligned in one direction, and a second layer disposed on the other side of the core layer, And a second layer arranged side by side in an intersecting direction. The core layer may comprise a composite material in which the fibers are arranged in both directions. Thus, the bistable characteristics can be obtained by the fiber directions of the first layer and the second layer which intersect with each other. However, the present invention is not limited thereto, and the deformable member 22 may have bistable characteristics by various methods using various materials.

However, the present invention is not limited thereto. When three or more stable states are required, a multi-stable material having a plurality of stable states suitable for the three stable states may be used as the deformable member 22. Such a multi-stable material may include various layers in which fibers are arranged so as to have respective stable states, and may have a multi-stable structure by various other materials and methods.

The shape of the display module 10 by the deformable member 22 can be variously modified. For example, in this embodiment, when the deformable member 22 is in the first stable state, the display module 10 maintains the flat state, and when the deformable member 22 is in the second stable state, State is maintained. More specifically, when the deformable member 22 is in the second stable state, the display module 10 can be deformed into a curved surface having a constant radius of curvature (reference symbol R in FIG. 5, hereinafter the same) in the left-right direction.

The deformable member 22 includes at least one deformed portion 220 formed along the left-right direction of the display module 10. Thus, the deformable member 22 can uniformly apply force in the left and right directions of the display module 10. At this time, in the present embodiment, the deformable members 22 are formed along the lateral direction of the display module 10 and have a plurality of deformed portions 220 spaced apart from each other in the vertical direction. 3 (a) and 3 (b), the upper and lower ends of the deformed portion 220 protrude toward the rear of the display device 100 when the deformed portion 220 is in the first stable state in which the deformed portion 220 is convex toward the display module 10 Quot; P " in (a) of FIG. Accordingly, the thickness of the display device 100 can be reduced. In the drawing, for example, two deformed portions 220 are illustrated, but the present invention is not limited thereto. Therefore, it is also possible that three or more deformed portions 220 are provided. It is also possible that the deformable member 22 consists of one deformed portion 220.

In this embodiment, the deformed portion 220 may have a curved shape with one reference axis in one stable state. Here, the reference axis means an axis formed by the axis which is the center of the radius of curvature in the curved surface shape. In the case of the first stable state and the second stable state, the reference axis is changed. This will be described in more detail with reference to FIG. 3 is a rear perspective view showing a deformed portion 220 constituting the deformable member 22 of the display device 100 according to the present embodiment.

3 (a), in the first stable state, the deformed portion 220 is concave toward the rear surface of the display device 100, convex toward the display module 10. At this time, the curvature of the deformed portion 220 is formed in the vertical direction of the display module 10, and the reference axis A1 formed by the center of the radius of curvature R1 is displaced from the display module 10 10 in the horizontal direction. That is, the central portion of the deformed portion 220 in the up-and-down direction is positioned adjacent to the side of the display module 10, and the upper and lower ends of the deformed portion 220 are located away from the display module 10. When the deformed portion 220 is in the first stable state, no force is applied to the display module 10, so that the display module 10 is maintained in a flat state.

3 (b), in the second stable state, the deformed portion 220 is convexly formed toward the rear surface of the display device 100 toward the display module 10. The curvature of the deformed portion 220 is formed in the lateral direction of the display module 10 and the reference axis formed by the center of the radius of curvature R2 is parallel to the vertical direction of the display module 10 . That is, the left and right end portions of the deformed portion 220 protrude toward the display module 10 from the center portion. As a result, the deformed portion 220 exerts an entire force in the left and right direction of the display module 10, thereby changing the display module 10 into a curved surface state.

The plurality of deformed portions 220 described above may be connected by the connecting member 26. [ The connection member 26 is formed along the vertical direction of the display module 10 and can connect a plurality of deformed portions 220 spaced along the vertical direction.

In this embodiment, the connecting member 26 includes first and second connecting members 262 and 264 corresponding to the left and right edges of the display module 10, a third connecting portion 262 and 264 corresponding to the central portion of the display module 10, Member 266 as shown in FIG. The first to third connecting members 262, 264 and 266 can be fixed by the plurality of deformed portions 220 and the fixing member 26a. The fixing member 26a for fixing the first to third connecting members 266 and the deforming portion 220 may be deformed at a portion where the first to third connecting members 266 and the deforming portion 220 cross each other. May be positioned to correspond to the center of portion 220. Thus, it is possible to prevent the deformed portion 220 from being disturbed when the stable state is switched. Various structures can be applied to the fixed structure. For example, Pam nuts and bolts can be used. Accordingly, the first to third connecting members 266 can be firmly fixed by a simple method.

In addition, the third connecting member 266 may be provided with a fixing member 26b fixed to the display module 10. Various structures can be applied to the fixed structure. For example, Pam nuts and bolts can be used. That is, the deformable member 20 is fixed only to the central portion of the display module 10 and freely positioned without being fixed at both side edges of the display module 10. As a result, the display module 10 is easily deformed by applying a force to the display module 10 by the deformable member 20 while allowing the switchable member to be freely switched when the stabilized state of the deformable member 22 is switched.

As described above, in this embodiment, the plurality of deformed portions 220 are stably connected and fixed by the first to third connecting members 262, 264, and 266, and the deformable members 220 20 may be fixed to the display module 10 so that the display module 10 can be uniformly deformed uniformly by the plurality of deformed portions 220. [ The number of the connecting members 26 is minimized and the structure can be simplified.

Thus, the deformable member 22 composed of the bistable composite material is switched from the first stable state to the second stable state or switched from the second stable state to the first stable state by a constant driving force. At this time, the present embodiment further includes a switching drive member 24 for providing a driving force to the deformable member 22.

The switching drive member 24 includes a first portion 242 located on a first side of the deformable member 22 (e.g., a surface adjacent to the display module 10), and a second portion 242 on a second side opposite to the first side And a second portion 244 positioned thereon. At this time, the first portion 242 and the second portion 244 may be formed in directions intersecting with each other. At this time, the adjacent first portion 242 of the display module 10 is formed in the up-down direction and the second portion 244 located on the opposite side is formed in the left-right direction, so that the shape change of the display module 10 becomes more smooth . This will be explained later.

Specifically, the first portion 242 is formed parallel to the up-and-down direction of the display module 10 and both side ends of the first portion 242 are fixed by the end fixing portion 242a and the fastening member 242b 22). The first portion 242 may be located in a plurality of positions to switch the stable state more smoothly. The first portion 242 is positioned between the first connecting member 262 and the third connecting member 266 and the two portions between the third connecting member 266 and the second connecting member 264 . The end fixing portion 242a may be made of a resin, a composite material or the like, and the fastening member 242b may be formed of a Pam nut, a bolt, or the like. With this structure, both end portions of the first portion 242 can be firmly fixed by a simple structure. However, the present invention is not limited thereto, and various fixing structures can be applied, and the number of the first portions 242 can also be changed.

And the second portion 244 is formed parallel to the left and right direction of the display module 10 and both side ends of the second portion 244 are fixed to the deforming member 22 by the end fixing portion 244a and the fastening member 244b. Respectively. The second portion 244 may be located in a plurality of positions to switch the stable state more smoothly. In the present embodiment, it is illustrated that the second portion 244 is located at two positions corresponding to the respective deformed portions 220. The end fixing portion 244a may be made of a resin, a composite material or the like, and the fastening member 244b may be formed of a Pam nut, a bolt, or the like. With this structure, both end portions of the second portion 244 can be firmly fixed by a simple structure. However, the present invention is not limited thereto, and various fixing structures can be applied, and the number of the second portions 244 can also be changed.

The first and second portions 242 and 244 can change the stable state of the deformable member 22 by changing the connection length between the both end portions fixed to the deformable member 22. [

In one example, the first and second portions 242 and 244 may be made of a material whose shape changes according to temperature. By providing thermal or electrical energy to the first and second portions 242 and 244 thereby changing the temperature of the first and second portions 242 and 244, the first and second portions 242 and 244 Can be changed. In this case, the first and second portions 244 and 244 may include a shape memory alloy. The shape memory alloy is an alloy that utilizes shape memory and super plasticity appearing in a metal that undergo austenite-martensitic transformation and has a different shape depending on the temperature. The first and second portions 242 and 244 are connected to an element or the like for driving the variable member 20 in the panel driving portion so that the temperature is adjusted and thus the connection length can be changed. When the first and second portions 242 and 244 include shape memory alloys and the connection length is changed by thermal energy or electrical energy, the structure is simple and easy to apply, and noise during deformation of the display module 10 Does not occur.

As another example, the connection length of the first and second portions 242 and 244 together with the panel driving portion may be changed by the mechanical energy provided to a separate driving portion (not shown, for example, a motor) have. That is, a part of the first and second parts 242 and 244 is fixed to the motor and a part of the first and second parts 242 and 244 is wound or unwound on the rotation shaft of the motor by the rotation of the motor, And the second portions 242 and 244 may vary. In this case, the first and second portions 242 and 244 may be made of a material that does not stretch or hardly elongate even under various conditions and has a large yield strength. The elongation of the first and second portions 242 and 244 can be difficult to precisely deform the connection length and provide more mechanical energy. In one example, the first and second portions 242, 244 may comprise a material such as a metal wire (e.g., stainless steel wire), an aramid fiber, a carbon steel wire, or the like. In addition, the first and second portions 242 and 244 may be constructed of various materials. A driving unit such as a motor for providing mechanical energy can have various configurations that can change the shape of the deformable member 20. [ As described above, when the driving member of the motor or the like changes the shape of the deformable member 20 by using mechanical energy, the deformable member 20 can be easily deformed and the deformation degree and the deformation time of the deformable member 20 can be precisely controlled can do.

The first and second portions 242, 244 may be 0.5 mm to 10 mm in diameter. If the diameters of the first and second portions 242 and 244 are less than 0.5 mm, the first and second portions 242 and 244 may be broken or deformed when receiving energy from the driving unit or the like. If the diameter of the first and second portions 242 and 244 exceeds 10 mm, the mechanical energy required to change the connection length of the first and second portions 242 and 244 increases, And the like. However, the present invention is not limited thereto, and the first and second portions 242 and 244 may have various diameters.

In the drawing, for example, the case where the first and second portions 242 and 244 are provided with the shape memory alloy and the connection length is changed by receiving the electrical energy is exemplified. When the temperature of the first portion 242 and the second portion 244 is increased, the connection length is reduced. This is because it is easier to pull the deformation portion 22 while reducing the connection length than pushing the deformation portion 22 while the connection length of the first and second portions 242 and 244 is increased. However, the present invention is not limited to this, and it is possible to modify the design such that the connection length is increased by increasing the temperature.

In this case, the plurality of first portions 242 may be connected in series, parallel, or series-parallel with each other by electric wires 282 or the like, and the connection length may be changed by the same electrical signal. The plurality of second portions 244 may be connected in series, parallel, or series-parallel with each other by electric wires 284 or the like, and the connection lengths may be changed together by the same electrical signal.

The rear cover 30 is positioned on the rear surface of the display module 10 and the deformable member 20. The rear cover 30 protects the display module 10, the panel driving unit, and the like by an external impact while providing a space for the structure of the panel driving unit and the like. In addition, the rear cover 30 covers the panel driving unit and the like to prevent the internal structure from being seen from the outside and to improve the appearance. For example, the rear cover 30 may be formed as a curved surface as a whole to secure a sufficient space and improve the appearance. In this embodiment, the rear cover 30 may have a material, structure, and the like that can correspond to the shape change of the display module 10.

A change in the shape of the display device 100 will be described in more detail with reference to FIGS. 4 and 5. FIG. FIG. 4 is a perspective view of a deformable member 20 for explaining the shape change of the display device 100 according to the embodiment of the present invention, and FIG. 5 is a perspective view showing a shape change of the display device 100 according to an embodiment of the present invention. 1 is a cross-sectional view of a display device 100 for explanation. 5, the illustration of the rear cover 30 is omitted for clarity. 4 and 5A show the case where the variable member 20 is in the first stable state and FIGS. 4 and 5B show the case where the variable member 20 is in the second stable state .

As shown in Figs. 4 (a) and 5 (a), the display module 10 has a planar state in the absence of any other operation.

At this time, as shown in Fig. 4A, the deformable member 22 has the first stable state. That is, the deformable member 22 (or the deformable member 22) is concavely formed toward the rear surface of the display device 100 so as to be convex toward the display module 10 in the vertical direction. In this state, the upper and lower end portions of the deformable member 22 are positioned on the opposite side of the display module 10, so that the deformable member 22 does not exert a force on the display module 10. [ As a result, the display module 10 is maintained in a planar state as shown in FIG. 5 (a).

When the user gives an instruction to change the shape of the display module 10, it provides heat or electric energy to the first portion 242 at the panel drive portion. Then, the connection length of the first portion 242 made of the shape memory alloy is shortened so that the first portion 242 pulls the upper and lower ends of the deformable member 22. At this time, since the plurality of first portions 242 are connected together in series, parallel, or series and parallel, the coupling length is shortened together to provide the driving force to the deformation member 22 as a whole.

Then, as shown in Fig. 4 (b), the deforming member 22 is switched to the second stable state by the snap-through phenomenon. That is, the deformable member 22 is formed to be concave in the left-right direction toward the rear surface of the display device 100 so as to be concave toward the display module 10 in the left-right direction. Thus, the left and right end portions of the deformable member 22 are projected toward the display module 10 from the center portion. 5 (b), when the display module 10 is in a curved state having a radius of curvature R, as shown in Fig. 5 (b), the deformable member 22 applies a force entirely in the lateral direction of the display module 10 Change. As a result, the user's immersion feeling can be further improved. If the temperature of the first portion 242 gradually decreases over time, the connection length again becomes longer to the first length. However, such a gradual change does not provide the deformable member 22 with a driving force equal to or greater than a certain level, so that the deformable member 22 remains in the second stable state.

When the user gives an instruction to change the shape to the original state again, it provides heat or electric energy to the second portion 244 at the panel driving portion. Then, the connection length of the second portion 244 made of the shape memory alloy is shortened so that the second portion 244 pulls the left and right ends of the deformable member 22. At this time, since the plurality of second portions 244 are connected together in series, parallel, or series-parallel, the coupling length is shortened together to provide the driving force to the deformation member 22 as a whole. Then, as shown in Figs. 4A and 5A, the deforming member 22 is switched to the first stable state by the snap-through phenomenon, and the display module 10 has a curved surface state . If the temperature of the second portion 244 gradually drops over time, the connection length becomes longer again to the original state. However, such a gradual change does not provide the deformable member 22 with a driving force equal to or greater than a certain level, so that the deformable member 22 remains in the first stable state.

As described above, in this embodiment, the shape of the display module 10 can be changed so as to improve the satisfaction of viewers. For example, the display module 10 may be curved so that the left and right edges of the display module 10 project forward so that the display module 10 has a predetermined radius of curvature R in the left and right directions. Then, the distance from the user's eyes to the display panel 12 is very fine even if there is no difference or difference in the center portion and the side portion. Accordingly, the immersion feeling of the user can be improved. Further, when the curved surface state is not required (for example, in the case of a current affairs program or a cultured program), the display module 10 may have a planar state to satisfy various demands of the viewer.

In the present embodiment, the shape of the display module 10 is easily changed by using the deformable member 22 including the multi-stable material and the diverting drive member 24 providing the driving force for the state phone in the deformable member 20 .

The stabilized state can be stably maintained even if the deformable member 22 does not have the constitution of a separate stopper member, fixing member, or the like including the multistable material. And a first portion 242 and a second portion 244 which are formed in a direction intersecting each other and located on the other side of the deformable member 22, You can easily switch states. At this time, the shape memory alloy can be used as the switching drive member 24 to easily switch the stable state without noise.

Features, structures, effects and the like according to the above-described embodiments are included in at least one embodiment of the present invention, and the present invention is not limited to only one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

100: display device
10: Display module
20: variable member
22:
24:
26:

Claims (20)

A display module; And
And a deformable member for changing the shape of the display module
Lt; / RTI >
Wherein the deformable member comprises a deformable member comprising a multi-stable material. The method according to claim 1,
Wherein the deformable member includes a bi-stable material and has a first stable state and a second stable state that are switched by snap through. 3. The method of claim 2,
The bistable composite material includes a core layer, a first layer disposed on one side of the center core material and including a composite material in which the fibers are aligned in one direction, and a second layer disposed on the other side of the core layer, And a second layer arranged side by side in a direction intersecting the first direction. 3. The method of claim 2,
Wherein the display module maintains a flat state when the deformable member is in the first stable state,
And the display module maintains a curved state when the deformable member is in the second stable state. The method according to claim 1,
Wherein the deformable member is formed in a curved shape having one reference axis in the first or second stable state. 3. The method of claim 2,
Wherein the deformable member is convexly formed toward the display module in the first stable state and is concave toward the display module in the second stable state. The method according to claim 6,
Wherein the deformable member is formed to be convex in a first direction of the display module from the first stable state toward the display module and in a second direction that intersects the first direction toward the display module in the second stable state The display device comprising: 8. The method of claim 7,
Wherein the first direction is a vertical direction of the display module, the second direction is a horizontal direction of the display module,
And the left and right end portions of the deformable member protrude from the central portion of the deformed portion towards the display module when the second stable state is established, thereby deforming the display module. The method according to claim 1,
Wherein the deformable member includes a plurality of deformed portions each extending along one direction of the display module,
Wherein the plurality of deformed portions are formed spaced apart from each other in a direction crossing the one direction. 10. The method of claim 9,
And a connecting member connecting the plurality of deformed portions in the other direction. 11. The method of claim 10,
Wherein the connecting member includes first and second connecting members respectively corresponding to first and second edges parallel to each other in the display module and a third connecting member corresponding to a central portion of the display module. 12. The method of claim 11,
And a fixing member for fixing the third connection member and the display module. The method according to claim 1,
And a switching drive member connected to the deformable member to provide a driving force for switching the stable state of the deformable member. 14. The method of claim 13,
Both end portions of the switching and driving member are fixed to the deformable member,
And the connection length between the both side ends of the switching and driving member changes to switch the stable state of the deformable member. 15. The method of claim 14,
Wherein the switching drive member includes a shape memory alloy. 16. The method of claim 15,
Wherein the switching drive member changes the connection length by supply of thermal energy or electric energy. 14. The method of claim 13,
Wherein the switching drive member includes a first portion positioned on a first surface side of the deformable member and a second portion connected to a second surface side of the deformable member opposite to the first surface,
Wherein the first portion and the second portion are formed in a direction intersecting with each other. 18. The method of claim 17,
Wherein the first surface of the deformable member is a surface adjacent to the display module,
Wherein the first portion is formed along a vertical direction of the display module, both side ends of the first portion are fixed to the deformable member,
Wherein the second portion is formed along a left-right direction of the display module, and both side ends of the second portion are fixed to the deformable member. 18. The method of claim 17,
Wherein said deformable member has a first stable state and a second stable state, which are switched by a snap-through,
Wherein the display module maintains a flat state when the deformable member is in the first stable state and the display module maintains a curved state when the deformable member is in the second stable state,
Changes the connection length of the first portion when switching from the first stable state to the second stable state and changes the connection length of the second portion when switching from the second stable state to the first stable state, . 18. The method of claim 17,
Wherein a plurality of the first portions are provided, and the plurality of first portions are connected in series, parallel or series-parallel,
Wherein a plurality of the second portions are provided, and the plurality of second portions are connected in series, parallel or series-parallel.

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