WO2016063782A1

WO2016063782A1 - Vibration device and haptic device

Info

Publication number: WO2016063782A1
Application number: PCT/JP2015/079117
Authority: WO
Inventors: 臼井健太朗
Original assignee: 株式会社村田製作所
Priority date: 2014-10-24
Filing date: 2015-10-15
Publication date: 2016-04-28
Also published as: JP6176409B2; JPWO2016063782A1

Abstract

In this haptic device (10), ribs (401) are disposed in the vicinity of areas where a piezoelectric film (20) and vibration members (40) are bonded together. Because there are ribs (401) disposed on the vibration members (40), when the piezoelectric film (20) and the vibration members (40) are bonded with adhesive (60), the ribs (401) prevent leakage of the adhesive (60), limiting squeeze out of the adhesive (60). Consequently, variation in the bonding strength can be suppressed. Also, variation in the vibration characteristics across products can be prevented.

Description

Vibration device and tactile presentation device

The present invention relates to a vibration device that transmits vibration.

2. Description of the Related Art In recent years, as an example of a vibration device, a touch-sensitive keyboard or the like has been proposed that provides a tactile feedback by transmitting vibration when a user touches a key and makes the key feel “pressed”. .

For example, Patent Document 1 describes a structure in which both ends of a piezoelectric bimorph element made of piezoelectric ceramics or the like are held by a low elastic body, and a vibrating material is connected to the center of the piezoelectric bimorph. In the structure of Patent Document 1, vibration is transmitted to a user through a connected vibration-receiving material by inputting an AC signal to the piezoelectric bimorph element and causing it to vibrate.

However, there is a problem that piezoelectric ceramics are easily broken. On the other hand, a material that is difficult to break, such as a piezoelectric film, has a weak force to transmit vibration and is difficult to use for a tactile sense presentation device.

Therefore, for example, a structure in which the end of a thin plate-like diaphragm is connected to a piezoelectric film and stress is applied to the diaphragm can be considered. In this case, the diaphragm vibrates in a direction orthogonal to the main surface due to expansion and contraction of the piezoelectric film. Since stress is applied to the diaphragm, it can be vibrated efficiently with respect to expansion and contraction of the piezoelectric film. Moreover, it can be made to vibrate more efficiently by adjusting the frequency which a piezoelectric film expands and contracts to the resonance frequency of the whole structure including a diaphragm and a film.

Also, for example, a structure in which a piezoelectric film is connected to a frame made of a prismatic member is also conceivable. In this case, the prism members facing each other are connected by a piezoelectric film, and the piezoelectric film is disposed in the opening of the frame. In this case, since the piezoelectric film is arranged directly under the touch panel or the like, the user touches the piezoelectric film when the user presses the touch panel, and the vibration of the piezoelectric film itself is directly transmitted to the user. Can communicate efficiently.

JP 2005-303937 A

When bonding the diaphragm and the film, the variation in the bonding position becomes an issue. If there is variation in the bonding position between the diaphragm and the film, the vibration characteristics will be different for each product.

Therefore, an object of the present invention is to provide a vibration device that prevents variations in the bonding position between the diaphragm and the film.

The vibration device of the present invention includes a film that deforms in a plane direction when a voltage is applied thereto, a vibration member having an end bonded to the film, and a drive unit that applies a drive signal to the film.

The vibration device is characterized in that an adhesion area control means is provided in the vicinity of the adhesion area between the film and the vibration member.

Although the resonance frequency of the vibration member varies depending on the connection position with the film, according to the above configuration, since the adhesion position is uniquely determined by the adhesion region control means, the resonance frequency does not change and the vibration characteristics are always changed. Can be kept appropriate.

The adhesion region control means includes, for example, protrusions, grooves, or water-repellent portions (or oil-repellent portions) provided on the vibration member. The protrusion can be attached to the diaphragm as a separate rib, or can be integrated with the diaphragm. In particular, when the adhesion region control means is a projection, the projection is used as a base point to expand and contract the film, so that the vibration characteristics can always be kept appropriate.

In addition, it is preferable that the adhesion region control means is provided over the entire width direction of the adhesion region. By being provided over the entire region in the width direction, the amount of protrusion of the adhesive is controlled when bonding with an adhesive, so that the vibration characteristics of each product are prevented from varying. Moreover, it is preferable that the adhesion region control means is provided on the end side of the vibration member.

Note that examples of the film that deforms in the plane direction when a voltage is applied include a piezoelectric film, an electrostrictive film, an electret film, a composite film, and an electroactive polymer film. Moreover, it is good also as an aspect which affixes the material (for example, piezoelectric film) which has piezoelectricity on the main surface of the resin film which does not have piezoelectricity, and connects the said resin film to a diaphragm.

The piezoelectric film can be made of polyvinylidene fluoride or polylactic acid.

According to this invention, it is possible to prevent variations in the bonding position between the diaphragm and the film.

1 is an external perspective view of a tactile presentation device 10. FIG. It is the front view and side view of the tactile sense presentation device 10. It is side surface sectional drawing and front view which showed the connection location of a piezoelectric film and a diaphragm in detail. 1 is a block diagram illustrating a configuration of a tactile sense presentation device 10. FIG. 10 is an operation explanatory diagram of the tactile presentation device 10. It is the side view and front view of 10 A of tactile sense presentation apparatuses. It is the figure which showed the other implementation example of the adhesion | attachment area | region control means. It is side surface sectional drawing which showed the connection location of a piezoelectric film and a diaphragm.

FIG. 1 is an external perspective view of a tactile sense presentation device 10 according to the first embodiment. FIG. 2A is a front view of the tactile sense presentation device 10, and FIG. 2B is a side view.

The tactile sense presentation device 10 includes a piezoelectric film 20, a diaphragm 40, and a touch panel 50. The tactile sense presentation device 10 is a so-called keyboard, and a flat touch panel 50 is provided with a plurality of touch sensors 80 at positions corresponding to the key arrangement. The touch sensor 80 corresponds to the touch detection unit of the present invention. The touch sensor 80 may be of any type as long as it has a function of detecting a user's touch operation, and various types such as a membrane type, a capacitance type, and a piezoelectric film type may be used.

The touch panel 50 is attached to one main surface (front surface) of the flat diaphragm 40. The diaphragm 40 has a rectangular shape in plan view. The diaphragm 40 has both ends in the lateral direction fixed to the piezoelectric film 20 on the other main surface (back surface). The diaphragm 40 is made of, for example, acrylic resin PMMA. The diaphragm 40 may be made of other materials such as a metal plate, PET, polycarbonate (PC), a glass epoxy substrate, or glass.

Note that the touch panel 50 is not essential. For example, a plurality of touch sensors 80 may be provided on the front surface of the diaphragm 40 at positions corresponding to the key arrangement. In this example, the piezoelectric film 20 is described in a size that substantially overlaps the diaphragm 40 in plan view. For example, a plurality of strip-shaped piezoelectric films 20 are arranged at intervals in the length direction. It is also possible to use this mode.

The piezoelectric film 20 has a rectangular shape in plan view like the diaphragm 40. As shown in FIGS. 3A and 3B, the piezoelectric film 20 includes a rectangular base film 200 in a plan view, electrodes 201A formed on both opposing main surfaces of the base film 200, and An electrode 201B is provided.

The base film 200 is a piezoelectric resin, and is made of, for example, polyvinylidene fluoride (PVDF), a chiral polymer, or the like. For example, L-type polylactic acid (PLLA) is used as the chiral polymer.

When PVDF is used for the piezoelectric film, since PVDF is water resistant, for example, an electronic device including a tactile presentation device can have the same click feeling in any humidity environment.

In addition, when PLLA is used for the piezoelectric film, PLLA is a highly permeable material. Therefore, when a transparent material is used for an electrode and a diaphragm to be added to PLLA, when manufacturing a functional component that vibrates, Since the internal state of the functional parts can be visually confirmed, there is a merit in manufacturing. Moreover, the position of the key can be visually recognized even in a dark place by disposing a light source such as a light inside the functional component. Furthermore, since PLLA has no pyroelectricity, the same click feeling can be obtained under any temperature environment.

When the base film 200 is composed of PLLA, as shown in FIG. 2 (A), by cutting each outer periphery to be approximately 45 ° with respect to the stretching direction, a rectangular shape is formed, Give piezoelectricity. In addition, by using PLLA cut in this way, the 0 ° direction or 90 ° direction is substantially parallel to the width direction of the diaphragm 40, so that the diaphragm can be efficiently operated at a low voltage. Note that substantially 45 ° is 45 ± 10 °. Although 45 ° is ideal, in the range of 45 ° ± 10 °, almost the same characteristics as 45 ° can be obtained.

The electrode 201A and the electrode 201B are formed on substantially the entire main surfaces of the base film 200. The

electrodes

201A and 201B are preferably vapor deposition electrodes such as aluminum (Al) and copper (Cu). In addition, when transparency is required for the electrode of the piezoelectric film 11, it is preferable to use an electrode mainly composed of indium tin oxide (ITO), zinc oxide (ZnO), polythiophene, or a silver nanowire electrode material. Moreover, you may use the electrode material which uses carbon, such as a carbon nanotube and a carbon fiber, for the electrode of the piezoelectric film 11. FIG. A lead wiring conductor (not shown) is connected to the electrode 201A and the electrode 201B, and a drive signal is applied to the electrode 201A and the electrode 201B through the wiring conductor.

The diaphragm 40 is connected to the electrode 201A of the piezoelectric film 20 with an adhesive 60 and fixed. However, the diaphragm 40 may be connected to a portion of the piezoelectric film 20 where the electrode 201A is not formed. In this case, the diaphragm 40 is connected to the base film 200 via the adhesive 60.

Such a piezoelectric film 20 is deformed in the surface direction when a voltage is applied. As shown in FIG. 4, when the user touches the touch sensor 80 provided on the touch panel 50, the drive unit 81 applies drive signals to the electrodes 201 </ b> A and 201 </ b> B of the piezoelectric film 20. Thereby, the piezoelectric film 20 expands and contracts in the surface direction.

As shown in FIGS. 1 and 2B, the diaphragm 40 is curved to the opposite side (front side of the diaphragm 40) with respect to the side where the piezoelectric film 20 exists (the back side of the diaphragm 40). It is fixed to the piezoelectric film 20 so as to have a protruding shape. With this configuration, a hollow region 100 is formed between the diaphragm 40 and the piezoelectric film 20. The side where the diaphragm 40 is located is the front side of the tactile sense presentation device 10, and the side where the piezoelectric film 20 is located is the back side of the tactile sense presentation device 10.

However, in the present embodiment, the curved state of the diaphragm 40 is exaggerated for the sake of explanation. In practice, the main surface of the diaphragm 40 and the main surface of the piezoelectric film 20 are closer to being parallel. The hollow region 100 is desirably as small as possible.

Thus, since the vibration plate 40 is fixed to the piezoelectric film 20 with the flat plate surface curved, the vibration film 40 is applied to the piezoelectric film 20 in a state where bending stress is applied as indicated by the white arrow F901 in FIG. Fixed. In addition, the piezoelectric film 20 is in a state in which a tensile force is applied in a short direction on the main surface of the piezoelectric film 20 as indicated by a white arrow S901 in FIG.

FIG. 5 is an explanatory diagram of the operation of the tactile sense presentation device 10, and FIG. 5 (A) shows a state at a timing when the piezoelectric film 20 is contracted by a drive signal. FIG. 5B shows a state where no drive signal is applied or the amplitude of the drive signal is zero. FIG. 5C shows a state at the timing when the piezoelectric film 20 is extended by the drive signal.

When the drive unit 81 applies a drive signal to the piezoelectric film 20 and applies an electric field in the first direction of the piezoelectric film 20, the piezoelectric film 20 moves to the vibration plate 40 as indicated by an arrow S 911 in FIG. Shrink along the direction perpendicular to the fixed end. Then, the diaphragm 40 is pulled in the central direction from a place (an end in the short direction) fixed to the piezoelectric film 20. Thereby, the diaphragm 40 is curved so as to protrude further forward as indicated by an arrow F911 in FIG.

On the other hand, when the drive unit 81 applies a drive signal to the piezoelectric film 20 and applies an electric field in a second direction opposite to the first direction, the piezoelectric film 20 as shown by an arrow S912 in FIG. Extends along a direction orthogonal to the fixed end of the diaphragm 40. And the diaphragm 40 is pulled to the location (end part of a transversal direction) fixed to the piezoelectric film 20 from the center direction. Thereby, as shown by arrow F912 in FIG. 5C, diaphragm 40 is in a curved state in which the amount of forward protrusion is reduced.

Therefore, the vibration plate 40 changes to the state shown in FIG. 5A or the state shown in FIG. 5C based on the state shown in FIG. It vibrates along the direction (direction orthogonal to the main surface of the diaphragm 40). Thereby, the vibration according to the drive signal is transmitted to the touch panel 50 via the diaphragm 40 and transmitted to the user who touched the touch panel 50. Therefore, when the user touches the touch sensor 80 of the touch panel 50, the vibration is fed back, so that the user can feel that the key is “pressed”.

Since the diaphragm 40 is given a steady bending stress in a non-operating state, the force applied to the diaphragm 40 when the piezoelectric film 20 is stretched is in the same direction as the bending stress. Therefore, the tactile sense presentation device 10 can vibrate the diaphragm 40 efficiently and can transmit a strong vibration to some extent even when a piezoelectric film is used. In addition, the tactile sense presentation device 10 can be made thinner than vibration caused by a motor or the like.

In addition, it is desirable that the hollow region 100 is filled with a soft resin such as silicone gel to suppress a sound generated by the vibration of the piezoelectric film 20 and the diaphragm 40.

Then, as shown in FIG. 3A, the tactile sense presentation device 10 is provided with a rib 401 in the vicinity of the adhesion region between the piezoelectric film 20 and the diaphragm 40. The rib 401 is a protrusion attached to the diaphragm, and is made of, for example, a single-sided adhesive tape, a resist, a resin member, or a metal member. Alternatively, the rib 401 may be made of an adhesive hardened before the adhesive 60.

Since the rib 401 is provided on the end side of the diaphragm 40 in this way, when the piezoelectric film 20 and the diaphragm 40 are bonded with the adhesive 60, the rib 401 prevents the adhesive 60 from leaking, The amount of protrusion of the adhesive 60 is controlled. Thereby, the dispersion | variation in adhesive strength can be suppressed. Moreover, it is possible to prevent the vibration characteristics from being varied for each product.

In the example shown in FIG. 3A, the rib (adhesion region control means) 401 is arranged so as to prevent the adhesive 60 from spreading to the center side (bowed portion) of the diaphragm 40. For example, as shown in FIG. 8A, a rib 401B may be further arranged on the end side of the diaphragm 40. As a result, the adhesive 60 does not protrude from the end side of the diaphragm 40. The rib may be provided on the film side instead of the diaphragm side. Further, as shown in FIG. 8B, the piezoelectric film 20 may be firmly fixed not only by the adhesive 60 but also by the aluminum foil 501 and the grommet 502. In this case, the end in the width direction of the diaphragm 40 is thinly cut and provided with a notch 503 so that the thickness does not increase. Further, the aluminum foil 501 is for preventing a mechanical load from being applied to the piezoelectric film 20 when the piezoelectric film 20 is fixed by the grommet 502.

Furthermore, when the rib 401 is in contact with the piezoelectric film 20, the rib 401 serves as a base point for the portion of the piezoelectric film 20 that expands and contracts. That is, the piezoelectric film 20 between the ribs 401 facing each other in plan view expands and contracts. Although the resonance frequency of the diaphragm 40 changes depending on the connection position with the piezoelectric film 20, in this example, the connection position of the piezoelectric film 20 is uniquely determined by the position of the rib 401, so the resonance frequency may change. The vibration characteristics can always be kept appropriate.

In addition, it is preferable that the rib 401 is provided over the whole width direction of the adhesion | attachment area | region of the piezoelectric film 20, as shown in FIG.3 (B). By being provided over the entire region in the width direction, leakage of the adhesive 60 is prevented over the entire region in the width direction.

Next, a tactile presentation device 10A that is a modification of the tactile presentation device 10 will be described. 6A is a side cross-sectional view of the haptic presentation device 10A, and FIG. 6B is a plan view of the haptic presentation device 10A.

In this example, the vibration member 40A is made of a prismatic member, and forms a rectangular frame in plan view. That is, the vibration member 40A is open at the center when viewed in plan. The vibration member 40A is made of a material such as acrylic resin PMMA, metal plate, PET, polycarbonate (PC), glass epoxy substrate, or glass.

The piezoelectric film 20A having a rectangular shape in plan view is connected to the vibrating member 40A so as to cover the opening. The piezoelectric film 20A is bonded with an adhesive 60A on the upper surface of the vibration member 40A so as to connect the prism members facing each other. At this time, the piezoelectric film 20A is in a state in which a tensile force is applied in the longitudinal direction (length direction).

Further, a frame body 40B is connected to the upper surface of the piezoelectric film 20A in the same shape as the vibration member 40A. The piezoelectric film 20A and the frame 40B are also bonded with an adhesive 60A. A contact film 65 is connected to the upper surface of the frame body 40B so as to cover the entire surface of the frame body 40B in plan view. A touch panel 50 </ b> A is connected to the upper surface of the contact film 65. The contact film 65 is made of a highly stretchable film material such as a polyester film or a polyurethane film. Thereby, the contact film 65 is supported in a state of facing the space between the piezoelectric film 20A.

In the tactile sense presentation device 10A, as shown in FIG. 6C, when the user's finger contacts the touch panel 50A, the piezoelectric film 20A vibrates. When the user pushes in the contact film 65 via the touch panel 50A, the contact film 65 and the piezoelectric film 20A come into contact with each other. Thereby, the vibration of the piezoelectric film 20A is transmitted to the user's finger via the contact film 65 and the touch panel 50A. Further, the resistance force when the user's finger pushes the piezoelectric film 20A through the contact film 65 varies depending on the change in the tension of the piezoelectric film 20A. This makes the user feel tactile feedback.

In the tactile sense presentation device 10A, a rib 402 is provided in the vicinity of the adhesion region between the piezoelectric film 20A and the vibration member 40A. Since the rib 402 is provided on the vibration member 40A, when the piezoelectric film 20A and the vibration member 40A are bonded with the adhesive 60A, the rib 402 prevents the adhesive 60A from leaking, and the amount of protrusion of the adhesive 60A is small. Be controlled. Thereby, the dispersion | variation in adhesive strength can be suppressed. Moreover, it is possible to prevent the vibration characteristics from being varied for each product.

Furthermore, when the rib 402 is in contact with the piezoelectric film 20A, the rib 402 serves as a base point for the portion of the piezoelectric film 20A that expands and contracts. That is, the piezoelectric film 20A between the ribs 402 facing each other in plan view expands and contracts. Therefore, also in this example, since the connection position of the piezoelectric film 20A is uniquely determined by the position of the rib 402, the resonance frequency does not change and the vibration characteristics can always be kept appropriate.

In this example, ribs 402 are also provided in the vicinity of the adhesive region between the piezoelectric film 20A and the frame 40B. Therefore, when the piezoelectric film 20A and the frame 40B are bonded with the adhesive 60A, the rib 402 prevents the adhesive 60A from leaking, and the amount of protrusion of the adhesive 60A is controlled.

Next, FIG. 7 is a diagram showing another example of realization of the adhesion region control means of the present invention. Although FIG. 1 to FIG. 6 show the rib 401 (or rib 402) provided on the diaphragm, the adhesion region control means is integrated with the diaphragm 40 as shown in FIG. 7A, for example. It can also be realized by the protrusion 403. In this case, the protrusion 403 is formed by molding the diaphragm 40 by press working or the like. In this case, since it is not necessary to provide a new member as the adhesion region control means, the cost is reduced and the member is not peeled off, so that the reliability is improved.

Further, the adhesion region control means can be realized by a groove 404 provided in the diaphragm 40 as shown in FIG. The groove 404 is formed by, for example, etching or machining. Alternatively, the groove 404 can be formed by preparing a plurality of thin diaphragms and bonding them at locations other than the position of the groove 404. In this case, since the protruding adhesive 60 enters the groove 404, the bonding position between the diaphragm 40 and the piezoelectric film 20 does not change.

Further, as shown in FIG. 7C, the adhesion region control means can also be realized by separately providing a base 405 in the diaphragm 40. The base 405 is made of, for example, a single-sided adhesive tape, a resist, a resin member, or a metal member, like the rib 401. Also in this case, like the groove 404, the protruding adhesive 60 wraps around the side surface of the base 405, so that the bonding position between the diaphragm 40 and the piezoelectric film 20 does not change.

Further, as shown in FIG. 7D, the adhesion region control means can also be realized by providing a water-repellent portion (or oil-repellent portion) 406 at a portion of the diaphragm 40 where the adhesive is not applied. The water repellent portion 406 is formed by applying a coating material such as a fluorine coating or a silicone coating. The water repellent portion 406 can also be realized by baking fluorine. Note that the structures illustrated in FIGS. 7A to 7D may be combined as appropriate. For example, both the base 405 in FIG. 7C and the water-repellent portion (or oil-repellent portion) 406 in FIG. 7D may be provided.

In this embodiment, a piezoelectric film is shown as an example of “a film that deforms in a plane direction when a voltage is applied”, but the present invention is not limited to a piezoelectric film. Other examples of the film that deforms in the plane direction when a voltage is applied include an electrostrictive film, an electret film, a composite film, and an electroactive polymer film. The electroactive film is a film that generates stress by electrical driving or a film that generates displacement by deformation. Specifically, there are an electrostrictive film, a composite material (a material obtained by resin-molding piezoelectric ceramics), an electrically driven elastomer, or a liquid crystal elastomer.

In this embodiment, the example in which the piezoelectric film 20 is directly connected to the vibration plate 40 has been shown. However, the piezoelectric film 20 is indirectly connected to the vibration plate 40 via another resin film that does not have piezoelectricity. It is good also as an aspect made. For example, the piezoelectric film 20 may be attached to the main surface of the resin film, and the end of the resin film may be connected to the vibration plate 40. Of course, in addition, a film such as an electrostrictive film, an electret film, a composite film, or an electroactive polymer film is attached to the main surface of the resin film, and the end of the resin film is connected to the diaphragm 40. It is also possible to adopt an aspect.

Also, the “film that deforms in the plane direction when a voltage is applied” can be realized by using, for example, piezoelectric ceramics and a resin film. For example, it can be realized by connecting a plurality of resin films via piezoelectric ceramics and connecting each of the plurality of resin films to the diaphragm 40.

Furthermore, the “film that deforms in the plane direction when a voltage is applied” may be a single layer or may be laminated. In particular, stronger vibration can be obtained by increasing the number of stacked layers. In the above-described example, the tactile presentation device is shown as an example of the vibration device. However, the vibration device of the present invention is not necessarily limited to the “tactile sense”. For example, a device that outputs sound such as a speaker is also used as the vibration device. An example.

DESCRIPTION OF

SYMBOLS

10,10A ...

Tactile presentation device

20, 20A ... Piezoelectric film 40 ... Diaphragm 40A ... Vibration member 40B ... Frame 50 ... Touch panel 50A ...

Touch panel

60, 60A ... Adhesive 65 ... Contact film 80 ... Touch sensor 81 ... Drive part 100 ... hollow area 200 ...

base films

201A, 201B ...

electrodes

401, 402 ... ribs 403 ... projections 404 ... grooves 405 ... water repellent portions

Claims

A film that deforms in the surface direction by applying voltage;
An end portion is bonded to the film, and the vibration member is separated from the film by a space.
A drive unit that applies a drive signal to the film,
A vibration device characterized in that an adhesion region control means is provided in the vicinity of an adhesion region between the film and the vibration member.
The vibration device according to claim 1, wherein the adhesion region control means is provided over the entire width direction of the adhesion region.
The vibration device according to claim 1 or 2, wherein the adhesion region control means is provided on an end portion side of the vibration member.
4. The vibration device according to claim 3, wherein the adhesion region control means includes a protrusion provided on the vibration member.
The vibration device according to claim 4, wherein the protrusion is a rib attached to the vibration member.
The vibration device according to claim 4, wherein the protrusion is integrated with the vibration member.
4. The vibration device according to claim 3, wherein the adhesion region control means includes a groove provided in the vibration member.
4. The vibration device according to claim 1, wherein the adhesion region control means includes a water repellent portion or an oil repellent portion provided on the vibration member.
The vibration device according to any one of claims 1 to 8, wherein the film contains polyvinylidene fluoride.
The vibration device according to any one of claims 1 to 8, wherein the film contains polylactic acid.
A film that deforms in the surface direction by applying voltage;
A vibrating member provided across the film and the first space;
A protrusion provided at an end of the vibration member, and forming a second space between the film and the vibration plate;
With
A vibration device, wherein an adhesive is provided in the second space.
A vibration device according to any one of claims 1 to 11,
A touch detection unit for detecting a touch operation;
A tactile presentation device comprising:
The drive unit is a tactile presentation device that applies a drive signal to the film when the touch detection unit detects a touch operation.