Tactile presentation device

Abstract

To appropriately control a position to give tactile sense on a panel surface.SOLUTION: A tactile presentation device includes a panel including a target region to be touched by a user, a plurality of vibrators disposed outside the target region, and a driving controller to supply driving signals to the vibrators. At least a partial region of the entire outer peripheral end of the panel is an absorber end region. The driving controller supplies the driving signals to the plurality of vibrators to form a standing wave on the target region. The driving signal is a synthetic wave of a carrier and a modulating wave at a frequency lower than a frequency of the carrier. The driving controller controls a location of a node of the standing wave in the target region with phase differences among carriers of the driving signals for the plurality of vibrators.SELECTED DRAWING: Figure 2A

Description

[Technical field]

[0001] The present disclosure relates to a tactile presentation device. [Background technology]

[0002] In recent years, electronic devices equipped with touch panels, such as smartphones and car navigation systems, have become widespread. When a user operates an object, such as an icon, included in a user interface displayed via the touch panel, the electronic device activates a function corresponding to the object.

[0003] Since the surface of a touch panel is uniformly hard, the user's finger feels the same no matter where it touches the touch panel. Therefore, there is known a technology that provides feedback to the user, such as making the user perceive the presence of an object, or, when a function corresponding to an object is activated, making the user perceive that an operation for that function has been accepted. This technology presents a tactile sensation to the touching finger by vibrating the surface of the touch panel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2020 / 0133425 [Patent Document 2] US Patent Application Publication No. 2013 / 0229384 [Patent Document 3] US Patent Application Publication No. 2011 / 0115734 Summary of the Invention [Problem to be solved by the invention]

[0005] It is sometimes required that a tactile presentation device presents tactile sensations when specific areas on a panel are touched, but not outside those areas. For example, a display device with a touch panel may display UI (User Interface) components that show user options and a background area that does not include the UI components. When a user touches one of the UI components, the system including the display device performs processing according to the touched UI component. In such a configuration, the system presents tactile sensations in the UI components, but not in the background area.

[0006] In the above example, the UI widget and the background area may be touched by different fingers at the same time. In such a case, the system is required to provide a haptic sensation to the finger touching the UI widget and not to the finger touching the background area. [Means for solving the problem]

[0007] A tactile presentation device of one embodiment of the present disclosure includes a panel including a target area for touch by a user, a plurality of vibrators arranged on the panel outside the target area, and a drive control device that provides drive signals to the vibrators, wherein at least a portion of the entire outer peripheral edge of the panel is an absorption end region, and the positions of the entire outer peripheral edge of the panel closest to each of the plurality of vibrators are included in the absorption end region, the drive control device provides drive signals to the plurality of vibrators to form standing waves in the target area, the drive signal being a composite wave of a carrier wave and a modulated wave having a lower frequency than the carrier wave, and the drive control device controls the position of the node of the standing wave in the target area by the phase difference of the carrier wave of the drive signals of the plurality of vibrators. Effect of the Invention

[0008] One aspect of the present disclosure is that it is possible to appropriately control the position on the surface of a panel where a tactile sensation is provided. [Brief description of the drawings]

[0009] [Figure 1A]1 shows a perspective view of a tactile presentation device 10. FIG. [Figure 1B] FIG. 1B is a cross-sectional view of the tactile presentation device taken along line IB-IB in FIG. 1A. [Figure 2A] 1 shows a perspective view of a tactile presentation device 10. FIG. [Figure 2B] FIG. 2B shows a cross-sectional view of the tactile presentation device taken along line IIB-IIB in FIG. 2A. [Diagram 3] An example configuration is shown in which three transducers are arranged on a tactile presentation panel, and the entire area of ​​the outer periphery of the tactile presentation panel is an absorption edge area. [Figure 4] An example configuration is shown in which four transducers are arranged on a tactile presentation panel, and the entire area of ​​the outer periphery of the tactile presentation panel is an absorption edge area. [Diagram 5] 3 shows configuration examples of a tactile presentation panel, a fixing member, and a vibration absorbing material. [Figure 6] 3 shows configuration examples of a tactile presentation panel, a fixing member, and a vibration absorbing material. [Figure 7] 3 shows configuration examples of a tactile presentation panel, a fixing member, and a vibration absorbing material. [Figure 8] 3 is a schematic diagram for explaining drive control of the tactile presentation device. FIG. [Figure 9] 1A and 1B are schematic diagrams for explaining generation of a drive signal by a waveform synthesizer and standing waves caused by vibration of a transducer. [Figure 10] 2A and 2B, a simulation result of a change in a standing wave pattern accompanying a change in the phase difference between two transducers is shown. [Figure 11] 2A and 2B, a simulation result of the change in the standing wave pattern with the change in the frequency of the two transducers is shown. [Figure 12] 13 shows the results of a simulation of changes in standing wave patterns in an example configuration in which three transducers are arranged on a tactile presentation panel and the entire area of ​​the outer circumferential edge of the tactile presentation panel is an absorption edge area. [Figure 13] 13 shows the results of a simulation of changes in standing wave patterns in an example configuration in which four transducers are arranged on a tactile presentation panel and the entire area of ​​the outer circumferential edge of the tactile presentation panel is an absorption edge area. [Figure 14] The figures show the results of a simulation of the change in the standing wave pattern with the change in frequency of the four transducers in an example configuration in which four transducers are arranged on a tactile presentation panel and the entire area of ​​the outer peripheral edge of the tactile presentation panel is an absorption edge area. [Figure 15] 1A and 1B, a simulation result of a change in a standing wave pattern accompanying a change in the phase difference between two transducers is shown. [Figure 16] 1A and 1B, a simulation result of the change in the standing wave pattern with the change in the frequency of the two transducers is shown. [Figure 17] The simulation results for an example configuration in which four oscillators and the entire peripheral edge are the absorption edge region are shown. [Figure 18] Simulation results for an example configuration in which three oscillators and the entire peripheral edge are in the absorption edge region are shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments will be described in detail with reference to the drawings. The same reference numerals are used to designate the same components in the various drawings. In order to make the description easier to understand, the dimensions and shapes of the objects shown in the drawings may be exaggerated.

[0011] In the following, a tactile presentation device that presents a tactile sensation to an indicator, such as a finger, touching a panel will be described. In the tactile presentation device, it is sometimes required to present a tactile sensation when a specific area on the panel is touched, and not present a tactile sensation outside of the area. For example, in a display device with a touch panel, a choice area showing a user's choices and a background area other than the choice area may be displayed.

[0012] When one of the option areas is touched by a user, the system performs processing according to the touched option. In such a configuration, the system presents a haptic sensation in the option area and does not present a haptic sensation in the background area. In the above example, the area showing the option and the other area may be touched by different fingers at the same time. In such a case, the system is required to provide a haptic sensation to the finger touching the option area and not present a haptic sensation to the finger touching the background area.

[0013] The displayed image is not necessarily constant. When the displayed image changes, the option area that presents the tactile sensation and the background area that does not present the tactile sensation may also change. In addition, when multiple fingers touch the touch surface at the same time, the positions of the fingers that present the tactile sensation and the fingers that do not present the tactile sensation are not always constant. It may be necessary to control the positions that present the tactile sensation and the positions that do not present the tactile sensation according to the positions of the touching fingers.

[0014] A tactile presentation device according to an embodiment of the present specification presents a tactile sensation in a selected region of a touch target region on a panel that can be touched by a user. At least a part of the entire area of ​​the outer peripheral edge of the panel is an absorption edge region. The absorption edge region absorbs a part or all of the panel vibration. The absorption rate of the absorption edge region is, for example, 40% or more.

[0015] A plurality of vibrators are arranged on a panel. The tactile presentation device controls the positions where tactile sensation is presented and the positions where tactile sensation is not presented by controlling the phase difference between the plurality of vibrators. The tactile presentation device may control the vibration frequency of the plurality of vibrators in addition to the phase difference between them. This allows for more accurate control of the positions where tactile sensation is presented and the positions where tactile sensation is not presented. The tactile presentation device can present tactile sensation only to touch positions selected from the plurality of touch positions on the panel by controlling the positions of the nodes (and antinodes) of the standing wave. <Device configuration>

[0016] 1A and 1B are schematic diagrams illustrating an example of the configuration of a tactile presentation device 10 according to an embodiment of the present specification. Fig. 1A illustrates a perspective view of the tactile presentation device 10, and Fig. 1B illustrates a cross-sectional view of the tactile presentation device 10 taken along the IB-IB cutting line in Fig. 1A. A drive control device that drives and controls the tactile presentation device 10 is omitted in Figs. 1A and 1B.

[0017] The tactile presentation device 10 presents a UI (user interface) including at least one object (image) to a user and accepts operations via the UI. The tactile presentation device 10 also provides the user with a tactile sensation for perceiving operations of objects included in the UI. The components of the tactile presentation device 10 shown in Figures 1A and 1B may be stored in, for example, any housing.

[0018] The tactile presentation device 10 includes a tactile presentation panel 100 and a display device 103. As shown in FIG. 1A, a touch target area 104 exists on the surface of the tactile presentation panel 100. The touch target area 104 is an area that can be touched by a user. The tactile presentation device 10 actually presents a tactile sensation in a part of the touch target area 104. The positions where the tactile sensation is actually presented (tactile presentation partial area) and the positions where the tactile sensation is not presented (tactile non-presentation partial area) in the touch target area 104 may change dynamically, or may be designated by the user in an initial setting, and these positions may be maintained.

[0019] In the following, for ease of explanation, it is assumed that a finger is used as an indicator that touches the tactile presentation panel 100. In Fig. 1A, different positions within the touch target area 104 are touched simultaneously by two fingers 111 and 112.

[0020] As shown in Fig. 1B, the tactile presentation panel 100 includes an insulating substrate 102 made of glass or resin and a touch electrode pattern 101 formed on the insulating substrate 102. The tactile presentation panel 100 is a tactile presentation panel and a touch panel at the same time. The touch electrode pattern 101 makes it possible to detect the position of a user's finger touching the touch surface, which is the front surface of the tactile presentation panel. A part or the whole of the touch electrode pattern 101 exists within a touch target area 104.

[0021] The touch electrode pattern 101 makes it possible to detect a touch position on the tactile presentation panel 100 by a pointer. Touch detection by the touch electrode pattern 101 can be realized by any method, and for example, a resistive film method, a surface capacitance method, or a projected capacitance method can be used.

[0022] 1B, a display device 103 is disposed on the rear side (back side) of the tactile presentation panel 100. In the following, the side on which a user using the tactile presentation panel 100 is positioned is referred to as the front side. The side opposite the front side is referred to as the rear side or back side.

[0023] The display device 103 displays a UI image including an object in the touch target area 104. The display device 103 may be any type of display device, for example, an OLED (Organic Light Emitting Diode) display device, a liquid crystal display device, or a micro LED display device.

[0024] The tactile presentation device 10 includes a vibration absorbing material 108 attached to the outer periphery of the tactile presentation panel 100. In the example shown in Fig. 1A, the entire outer periphery of the tactile presentation panel 100 is supported by the vibration absorbing material 108. In other words, the entire outer periphery of the tactile presentation panel 100 is an absorption end region. In the example shown in Fig. 1A, the tactile presentation panel 100 is rectangular, and the vibration absorbing material 108 is attached to the four sides of the tactile presentation panel 100.

[0025] The vibration absorbing material 108 comes into contact with the edge of the tactile presentation panel 100 and absorbs a part or all of the propagating waves on the surface of the tactile presentation panel 100. The vibration absorbing material 108 has viscoelasticity so that reflected waves can be attenuated more. The edge of the tactile presentation panel 100 may be supported by a support member (not shown) via the vibration absorbing material 108.

[0026] The vibration absorbing material 108 may be made of, but is not limited to, rubber, elastomer, or resin. The vibration absorbing material 108 may be made of a viscoelastic material or may have a viscoelastic property due to its structure. The vibration absorption rate of the vibration absorbing material 108 may be, for example, 30% or more, or even 60% or more.

[0027] 1A and 1B, two vibrators 105 are disposed on the tactile presentation panel 100. The positions closest to each of the two vibrators 105 at the outer circumferential edge of the tactile presentation panel 100 are included in the vibration absorbing region. In the example shown in Fig. 1A, the two vibrators 105 are disposed outside the touch target region 104, and face each other with the touch target region 104 in between. The two vibrators 105 are each disposed between the vibration absorbing material 108 and the touch target region 104.

[0028] The vibrator 105, which is a vibration generating device, vibrates the surface of the touch target area 104 by vibrating, making it possible to present a tactile sensation to the touching pointing body. In the configuration example shown in Figures 1A and 1B, the vibration generating device that vibrates the tactile presentation panel 100 to present a tactile sensation is only the two vibrators 105.

[0029] The vibrator 105 is, for example, a piezoelectric element, and vibrates in a direction perpendicular to the main surface of the tactile presentation panel 100. Note that the vibration direction of the vibrator 105 is not limited as long as the vibration of the vibrator 105 can form a desired standing wave in the tactile presentation panel 100. The vibrator 105 may be mounted by placing a preformed element on the insulating substrate 102, or may be formed directly on the insulating substrate 102 by a thin film formation process.

[0030] As described later, a two-dimensional standing wave can be formed by the vibration of the two vibrators 105. The amplitude of the standing wave is in a direction perpendicular to the main surface of the tactile presentation panel (Z-axis direction in FIG. 1B). For example, nodes and antinodes appear alternately between the two vibrators 105 (X-axis direction in FIG. 1B).

[0031] Since the outer peripheral edge of the tactile presentation panel 100 includes an absorption edge region, the node position of the standing wave can be changed significantly by changing the phase difference between the vibrations of the two vibrators 105. In addition, the node position can be changed in a variety of ways by changing the vibration frequency of the vibrators 105. In other words, by controlling the phase difference or the phase difference and frequency of the vibrators 105, the positions (areas) where the tactile sensation is presented and the positions (areas) where the tactile sensation is not presented in the touch target area 104 can be suitably controlled.

[0032] In the example shown in Figures 1A and 1B, the number of vibrators for forming the standing wave is two, and the entire area of ​​the outer peripheral edge of the tactile presentation panel 100 is an absorption end area. In other configuration examples, three or more vibrators may be spaced apart. As will be described later, by increasing the number of vibrators, it becomes possible to control the node positions more finely. Also, a portion of the outer peripheral edge of the tactile presentation panel 100 may be a fixed end area or a free end area.

[0033] 2A and 2B are schematic diagrams showing another example of the configuration of the tactile presentation device 10 according to an embodiment of the present specification. FIG. 2A shows a perspective view of the tactile presentation device 10, and FIG. 2B shows a cross-sectional view of the tactile presentation device 10 taken along the line IIB-IIB in FIG. 2A. In FIGS. 2A and 2B, a drive control device that drives and controls the tactile presentation device 10 is omitted. In the following, differences from the example of the configuration shown in FIGS. 1A and 1B will be mainly described.

[0034] In this configuration example, a portion of the outer peripheral edge of the tactile presentation panel 100 is a fixed end region, and the other portion is an absorption end region. The vibration absorption rate of the fixed end region is smaller than that of the absorption end region, and the absolute value of the vibration reflectance of the fixed end region is larger than that of the absorption end region. The fixed end region enables diverse or fine node position control with a smaller number of oscillators.

[0035] 2A and 2B, the tactile presentation device 10 includes a fixing member 107 that fixes a partial area of ​​the outer peripheral edge of the tactile presentation panel 100, and a vibration absorbing material 108 attached to the other area. The fixing member 107 directly contacts the outer peripheral edge of the tactile presentation panel 100, and fixes and supports the end so that a propagating wave (propagating vibration) on the surface of the tactile presentation panel 100 is reflected at the fixed end. The fixing member 107 can be formed of, for example, resin or metal, but is not limited to these. In the configuration example shown in FIG. 2A, one side of the rectangular tactile presentation panel 100 is fixed and supported by the fixing member 107 and constitutes a fixed end area. The other three sides are absorbing end areas.

[0036] The two vibrators 105 are disposed at positions facing the fixed member 107 (fixed end region) across the touch target region 104. In the example shown in Fig. 2A, the two vibrators 105 are disposed apart from each other along the sides of the tactile presentation panel 100. The two vibrators 105 are disposed between the touch target region 104 and a vibration absorbing material 108 that faces the fixed member 107.

[0037] The vibrator 105 vibrates the surface of the touch target area 104, making it possible to present a tactile sensation to the touching pointing body. In the configuration example shown in Figures 2A and 2B, the vibrator 105 is the only vibration generating device that vibrates the tactile presentation panel 100 to present a tactile sensation.

[0038] As described later, a two-dimensional standing wave can be formed by the vibration of the two oscillators 105. The region fixed by the fixing member 107 is the fixed end region, which becomes the node of the standing wave. The fixed end region is also a reflecting end region that reflects the propagating wave, and a phase shift occurs in the reflection, making the reflectance negative. The reflectance of the free end region is positive. The fixed end has the greatest reflectance of -1, and the free end has the greatest reflectance of 1.

[0039] By including a fixed end region or a free end region at the outer peripheral edge of the tactile presentation panel 100, it is possible to form nodes of a mesh-like standing wave by the two vibrators 105. By changing the phase difference between the vibrations of the two vibrators 105, it is possible to change the positions of the nodes of the standing wave. In addition, by changing the vibration frequency of the vibrators 105, it is possible to further change the positions of the nodes in various ways. In other words, by controlling the phase difference, or the phase difference and frequency, of the vibrators 105, it is possible to suitably control the positions (areas) where a tactile sensation is presented and the positions (areas) where a tactile sensation is not presented in the touch target area 104.

[0040] 2A and 2B, the number of vibrators for forming the standing wave is two, and a part of the outer peripheral edge of the tactile presentation panel 100 is the fixed end region. In other configuration examples, three or more vibrators may be arranged at a distance. In addition, at least a part of the fixed end region may be a free end region, and a part of the absorbing end region may be a fixed end region or a free end region.

[0041] 3 and 4 show configuration examples of a tactile presentation panel and a vibration absorbing material. Fig. 3 shows a configuration example in which three vibrators are arranged on a tactile presentation panel 100, and the entire area of ​​the outer periphery of the tactile presentation panel 100 is an absorbing end area.

[0042] The tactile presentation panel 100 is rectangular, and vibration absorbing materials 108 are attached to the four sides. The transducers 105A, 105B, and 105C are located at the vertices of an imaginary triangle. In the example shown in FIG. 3, the transducers 105A, 105B, and 105C are located at the vertices of an isosceles triangle. Furthermore, the transducers 105A and 105B are located near the corners of the tactile presentation panel 100, and the transducer 105C is located near the center of one side of the tactile presentation panel 100.

[0043] On the Y-axis (vertical axis), transducers 105A and 105B are in the same position, but transducer 105C is in a different position. On the X-axis (horizontal axis), transducer 105C is in the center between transducers 105A and 105B. The positions of the three transducers may be any vertices of a triangle, and are not limited to the example shown in FIG. 3.

[0044] FIG. 4 shows a configuration example in which four transducers are arranged on the tactile presentation panel 100, and the entire area of ​​the outer peripheral edge of the tactile presentation panel 100 is an absorbing edge area. The tactile presentation panel 100 is rectangular, and vibration-absorbing materials 108 are attached to the four sides. The transducers 105A to 105D are located at the vertices of an imaginary quadrangle. In the example shown in FIG. 4, the transducers 105A to 105D are located at the vertices of a rectangle. Also, the transducers 105A to 105D are located near the corners of the tactile presentation panel 100. Note that the arrangement positions of the four transducers need only be the vertices of a quadrangle, and are not limited to the example shown in FIG. 4. Three, four, five or more transducers may be arranged at positions different from the examples shown in FIGS. 3 and 4.

[0045] 5, 6, and 7 show configuration examples of a tactile presentation panel, a fixing member, and a vibration absorbing material. As shown in Figs. 5, 6, and 7, the tactile presentation panel 100 can have a shape other than a rectangle. In the configuration example shown in Fig. 5, one side of the tactile presentation panel 100 is straight, and the other three sides are curved. A vibration absorbing material 108B is attached to the straight side, and the opposite side is fixed by a fixing member 107. Vibration absorbing materials 108A and 108C are attached to the other two sides.

[0046] The outer peripheral edge positions of the tactile presentation panel 100 to which the two vibrators 105 are closest are within the absorption edge region. The side of the tactile presentation panel 100 farthest from the two vibrators 105 is fixed by a fixing member 107. The touch target region (not shown) exists, for example, between the two vibrators 105 and the fixing member 107.

[0047] 6, the outer peripheral edge of the tactile presentation panel 100 is elliptical. A portion of the outer peripheral edge is fixed by a fixing member 107. The other portion is fitted with a vibration absorbing material 108. The outer peripheral edge positions of the tactile presentation panel 100 to which the two vibrators 105 are closest are within the absorption edge region. The touch target region (not shown) exists, for example, between the two vibrators 105 and the fixing member 107.

[0048] In the configuration example shown in Fig. 7, the outer peripheral edge of the tactile presentation panel 100 is formed with a more complicated curve. Three vibrators 105 are arranged at a distance from each other on the tactile presentation panel 100. The outer peripheral edge positions of the tactile presentation panel 100 to which the three vibrators 105 are closest are within the absorption edge region. The three vibrators 105 are arranged between the touch target region 104 and one vibration absorbing material 108 (absorption edge region). The region facing the three vibrators 105 is composed of an absorption edge region and a fixed edge region arranged alternately.

[0049] In the configuration example shown in FIG. 7, the viewing angle from any point in the touch target area 104 to the absorption edge area closest to the three transducers 105 is 180° or more. In other words, a continuous area with a viewing angle of 180° or more from any point in the touch target area 104 is the absorption edge area, and the entire range of 180° from the entire touch target area 104 is the absorption edge area. This is the same in the configuration examples shown in FIGS. 1 to 4. This makes it possible to more appropriately control the position of the node of the standing wave. Note that in the configuration examples described with reference to FIGS. 3 to 5, the fixed end area by the fixing member 107 may be an open free end area. <Drive control configuration>

[0050] 8 is a schematic diagram for explaining the drive control of the tactile presentation device 10. The drive control device of the tactile presentation device 10 includes a control device 201 and a waveform synthesis device 203 which is a drive device. The control device 201 controls the display device 103 to present a desired image to the user via the transparent insulating substrate 102 of the tactile presentation panel.

[0051] The control device 201 may include one or more arithmetic devices that execute programs and one or more storage devices. The arithmetic devices may include, for example, a processor, a GPU (Graphics Processing Unit), and an FPGA (Field Programmable Gate Array). The storage device stores programs and data used by the control device 201. The storage device may include volatile or non-volatile memory. The storage device includes a work area used by the programs.

[0052] The control device 201 operates as a functional unit (module) for controlling the display device 103 and the tactile presentation panel 100. Specifically, the control device 201 performs touch detection, display control, and tactile control. The display control controls the display of the UI on the display device 103. Specifically, the display control acquires UI setting information from a storage device, and controls the display device 103 based on the information so that a UI including at least one object is displayed.

[0053] The control device 201 drives the touch electrode pattern 101 and detects a position on the insulating substrate 102 touched by one or more fingers based on a signal received from the touch electrode pattern 101. The control device 201 controls an image to be displayed on the display device 103 based on the detected touch positions of the fingers, and also controls the vibrators 105A and 105B. Fig. 8 shows two vibrators 105A and 105B as an example.

[0054] For example, suppose that finger 112 touches a position corresponding to a specific object image, and finger 111 touches a background area. Control device 201 controls transducers 105A and 105B to generate standing waves whose amplitude is large at finger 112 and small at finger 111.

[0055] The control device 201 generates drive signals V1 and V2 so as to vibrate the transducers 105A and 105B with a desired frequency and phase difference by controlling the waveform synthesizer 203. The waveform synthesizer 203 includes a carrier wave oscillator 211, a modulated wave generator 212, and a phase shifter 213.

[0056] Carrier wave oscillator 211 outputs a sine wave of frequency fc specified by control device 201 as carrier wave W1. Frequency fc is one of the variables that can change the shape of the standing wave. Phase shifter 213 changes the phase of carrier wave W1 to output carrier wave W2 having a specific phase difference φ with carrier wave W1. Phase difference φ is one of the variables that can change the shape of the standing wave. The phase difference is specified by control device 201.

[0057] The modulated wave generator 212 outputs a modulated wave S that modulates the carrier waves W1 and W2. The modulated wave has a predetermined window function. The composite wave of the carrier wave W1 and the modulated wave S is the drive signal V1 that drives the transducer 105A. The composite wave of the carrier wave W2 and the modulated wave S is the drive signal V2 that drives the transducer 105B.

[0058] The tactile presentation panel 100 (insulating substrate 102) is supported at both ends by support parts. One support part is composed of vibration absorbing material 108A and support member 235A, and the other support part is composed of vibration absorbing material 108B and support member 235B. The support members 235A and 235B may be formed of, for example, the same material as the fixing member 107. One support part supports the end of the insulating substrate 102 by the support member 235A via the vibration absorbing material 108A. The other support part supports the end of the insulating substrate 102 by the support member 235B via the vibration absorbing material 108B. As described above, one support part may be composed of the fixing member 107.

[0059] A standing wave 251 is generated on the tactile presentation panel 100 by the vibration of the vibrators 105A and 105B. FIG. 8 shows the maximum amplitude of the standing wave 251. The frequency of the standing wave 251 depends on the frequency of the vibrators 105A and 105B. In this example, the frequencies of the vibrators 105A and 105B are assumed to be common. They may be different. By changing the frequency of the vibrators 105A and 105B and / or the phase difference between them, a standing wave having a node at a desired position can be generated. In the following, it is assumed that both the vibration frequency and the phase difference of the vibrators 105A and 105B are controlled. For example, the frequency of the vibrators 105A and 105B may be constant and only the phase difference may be changed.

[0060] When multiple fingers are touching the touch target area 104, a tactile sensation, for example, a click sensation, can be selectively presented to specific fingers by selecting the frequency and phase difference of the standing waves. Specifically, a standing wave is generated in which the position of the finger that gives the click sensation is close to the position of the antinode, and the position of the finger that does not give the click sensation is close to the node.

[0061] The tactile presentation panel 100 may further include a force sensor. The force sensor detects a force applied by a user in a direction perpendicular to the main surface of the tactile presentation panel 100. For example, when a specific area on the touch electrode pattern 101 is touched and a value detected by the force sensor exceeds a threshold, the control device 201 vibrates the vibrators 105A and 105B. Regarding each functional unit of the control device 201, multiple functional units may be integrated into one functional unit, or one functional unit may be divided into multiple functional units for each function. <Generation of driving waveform>

[0062] 9 is a schematic diagram for explaining the generation of drive signals V1 and V2 by the waveform synthesizer 203 (see FIG. 8) and the standing wave caused by the vibration of the vibrators 105A and 105B. The control device 201 (see FIG. 8) determines the frequency and phase difference of the vibration of the vibrators 105A and 105B so that the position of the finger that does not sense the tactile sensation, of the two fingers close together that have detected the touch, is located near the node of the standing wave. This makes it possible to make only one of the two fingers close together sense the tactile sensation.

[0063] The control device 201 detects touch positions of two fingers simultaneously touching the insulating substrate 102 based on a signal from the touch electrode pattern 101. According to the setting, the control device 201 determines which of the two fingers does not provide a tactile sensation. For example, the finger touching the background area is selected.

[0064] The control device 201 calculates fc and φ that provide appropriate antinodes and nodes of the standing wave for the finger position, and generates carrier waves W1 and W2 from a carrier wave oscillator 211 and a phase shifter 213. The control device 201 holds in advance information that associates a combination of the frequency fc and phase difference φ of the drive signals (carrier waves) provided to the vibrators 105A and 105B with the positions of the nodes and antinodes on the tactile presentation panel 100 of the generated standing wave.

[0065] For example, the information may be a model that outputs a frequency fc and a phase difference φ in response to an input of a position that should be a node or antinode. Also, information indicating a standing wave pattern (relationship between amplitude and position) for each combination of frequency fc and phase difference φ may be stored. The control device 201 can search for a pattern that satisfies the specified node and antinode positions, and determine the frequency fc and phase difference φ.

[0066] The control device 201 selects, for example, a standing wave in which the position of one detected finger is within a predetermined distance from the node and the position of the other finger is at a position that is more than a predetermined distance away from the node. The control device 201 controls the waveform synthesizer 203 to generate drive signals V1 and V2 corresponding to the standing wave. In this way, the control device 201 can transmit vibration to only one of two adjacent fingers. That is, it is possible to generate vibration at any location and simultaneously eliminate vibration at any location.

[0067] As described above, the carrier wave oscillator 211 generates the carrier wave W1, which is a sine wave with a frequency fc, in accordance with an instruction from the control device 201. The frequency fc is, for example, within a range of 1 kHz to several tens of kHz, and is a frequency at which a person cannot tactilely perceive the vibration.

[0068] The modulated wave generator 212 generates a modulated wave S having a vibration waveform that is desired to be perceived by a person. The modulated wave generator 212 generates and outputs a preset modulated wave S. The modulated wave S has a window function waveform that gradually increases and decreases. The window function waveform is a waveform that is composed of frequency components that characterize the tactile stimulation, for example, from 1 Hz to 500 Hz. This enables more appropriate and selective presentation of tactile sensation to the fingers.

[0069] A carrier wave W1 of frequency fc is modulated by a modulating wave S having a waveform that causes a tactile sensation to be perceived, and a composite waveform V1, which is a drive signal, is generated. The drive signal V1 is provided to the transducer 105A, which vibrates in response to the drive signal V1. A phase difference φ is provided to the carrier wave W1 of frequency fc by the phase shifter 213, and a carrier wave W2 is generated. The carrier wave W2 is modulated by the modulating wave S, and a composite waveform V2, which is a drive signal, is generated. The drive signal V2 is provided to the transducer 105B, which vibrates in response to the drive signal V2.

[0070] Vibrations are transmitted from the vibrators 105A and 105B to the insulating substrate 102, forming a standing wave 251. The finger 112 is located away from the node of the standing wave 251. In the example of FIG. 9, the finger 112 is located near the antinode of the standing wave 251. A large vibration occurs at the position of the finger 112, and the vibration of the envelope is perceived by the user. Meanwhile, the finger 111 is touching a position near the node of the standing wave 251. At the node, the propagating waves cancel each other out, so the vibration is very small. Therefore, the finger 111 does not feel the vibration on the surface of the insulating substrate 102. <Panel vibration>

[0071] The following describes the vibration of the standing wave in the touch target area 104 in the tactile presentation panel 100. The following describes how the positions of the nodes and antinodes of the standing wave change depending on the phase difference or frequency of multiple vibrators. Since the positions of the nodes and antinodes of the standing wave change continuously within the plane, it is possible to control the tactile presentation position and the tactile non-presentation position with higher accuracy.

[0072] 10 shows a simulation result of a change in a standing wave pattern accompanying a change in the phase difference between two vibrators 105 in the configuration example described with reference to Figs. 2A and 2B. In the configuration example described with reference to Figs. 2A and 2B, three sides of the rectangular tactile presentation panel 100 are absorption end regions, and one side is a fixed end region. Note that even when a free end region is arranged instead of the fixed end region, the standing wave pattern shows approximately the same change.

[0073] 10, standing wave patterns 501 to 505 show the change in the standing wave pattern when the frequency of the two transducers 105 is 1760 Hz and the phase difference is changed stepwise from 0° to 180°. The standing wave patterns 501 to 505 show standing wave patterns with phase differences of 0°, 45°, 90°, 135°, and 180°, respectively.

[0074] As shown in standing wave patterns 501 to 505, the standing wave has a mesh pattern. In standing wave pattern 501, positions 511A and 511B indicate positions where transducers are arranged. Circle 521 indicates the position of one antinode. In standing wave patterns 502 to 505, the reference symbols for positions 511A and 511B are omitted.

[0075] As can be seen from Fig. 10, the position of circle 521 moves to the left in Fig. 8 as the phase difference increases. Similarly, the position of the node moves to the left as the phase difference increases. In this way, by changing the phase difference of oscillator 105, the positions of the node and antinode can be changed continuously.

[0076] 11 shows a simulation result of the change in the standing wave pattern accompanying the change in frequency of the two vibrators 105 in the configuration example described with reference to FIGS. 2A and 2B. Note that even when a free end region is arranged instead of the fixed end region, the standing wave pattern shows approximately the same change.

[0077] 11, standing wave patterns 551 to 554 show the change in the standing wave pattern when the phase difference between the two transducers 105 is 0° and the frequency changes stepwise from 1760 Hz to 1218 Hz. Standing wave patterns 551 to 554 show standing wave patterns with frequencies of 1760 Hz, 1540 Hz, 1383 Hz, and 1218 Hz, respectively.

[0078] As shown in standing wave patterns 551 to 554, the standing wave has a mesh pattern. In standing wave pattern 551, positions 511A and 511B indicate positions where transducers are arranged. Circle 521 indicates the position of one antinode. In standing wave patterns 552 to 554, the reference symbols for positions 511A and 511B are omitted.

[0079] As can be seen from Fig. 11, the position of circle 521 moves downward in Fig. 9 as the frequency decreases. Similarly, the position of the node moves downward as the frequency decreases. The interval between the nodes increases as the frequency increases, based on the upper end of the standing wave pattern, as the frequency decreases. In this way, by changing the frequency of vibrator 105, the positions of the nodes and antinodes can be changed continuously.

[0080] As described with reference to Fig. 10, the node position can be continuously changed in the horizontal direction (X-axis direction) by controlling the phase difference between the two oscillators 105. Also, as described with reference to Fig. 11, the node position can be continuously changed in the vertical direction (Y-axis direction) by controlling the frequency of the two oscillators 105. Therefore, by controlling the phase difference and frequency of the oscillators 105, the node position of the standing wave can be continuously controlled with higher accuracy.

[0081] Fig. 12 shows a simulation result of a change in a standing wave pattern in an example configuration (see Fig. 3, for example) in which three transducers 105 are arranged on the tactile presentation panel 100 and the entire area of ​​the outer peripheral edge of the tactile presentation panel 100 is an absorption edge area. The frequency of the three transducers 105 is constant at 1760 Hz. Fig. 12 shows standing wave patterns 601 to 609, which show the change in the standing wave pattern with the change in the phase difference between the three transducers 105. As shown in the standing wave patterns 601 to 609, the standing wave has a mesh-like pattern.

[0082] The standing wave pattern 601 shows three transducer positions 611A, 611B and 611C. In the other standing wave patterns 602 to 609, the reference numerals for the transducer positions 611A, 611B and 611C are omitted. In the standing wave patterns 601 to 609, a circle 621 shows the position of one antinode.

[0083] The positions 611A, 611B, and 611C of the vibrators are at the vertices of a virtual triangle. In the example shown in FIG. 12, the positions 611A, 611B, and 611C are the vertices of an equilateral triangle. The positions 611A and 611B are near the corners of the tactile presentation panel 100, and the position 611C is near the center of one side of the tactile presentation panel 100. On the Y axis (vertical axis), the values ​​of the positions 611A and 611B are the same, and the value of the position 611C is different. On the X axis (horizontal axis), the value of the position 611C is in the center between the positions 611A and 611B. Note that the positions of the three vibrators may be any vertices of a triangle, and are not limited to the example shown in FIG. 12.

[0084] The phase difference between the transducer at position 611A and the transducer at position 611B is φ1, and the phase difference between the transducer at position 611A and the transducer at position 611C is φ2. As described above, the frequency fc of the carrier waves of the three transducers is 1760 Hz.

[0085] In the standing wave pattern 601, the phase difference φ1 is 0° and the phase difference φ2 is 180°. In the standing wave pattern 602, the phase difference φ1 is 90° and the phase difference φ2 is 180°. In the standing wave pattern 603, the phase difference φ1 is 180° and the phase difference φ2 is 180°. In the standing wave pattern 604, the phase difference φ1 is 0° and the phase difference φ2 is 90°. In the standing wave pattern 605, the phase difference φ1 is 90° and the phase difference φ2 is 90°. In the standing wave pattern 606, the phase difference φ1 is 180° and the phase difference φ2 is 90°. In the standing wave pattern 607, the phase difference φ1 is 0° and the phase difference φ2 is 0°. In the standing wave pattern 608, the phase difference φ1 is 90° and the phase difference φ2 is 0°. In the standing wave pattern 609, the phase difference φ1 is 180° and the phase difference φ2 is 0°.

[0086] Standing wave patterns 601, 602, and 603 have the same phase difference φ2 of 180°, but their phase differences φ1 are different. Standing wave patterns 604, 605, and 606 have the same phase difference φ2 of 90°, but their phase differences φ1 are different. Standing wave patterns 607, 608, and 609 have the same phase difference φ2 of 0°, but their phase differences φ1 are different. As can be seen from these standing wave patterns, a change in phase difference φ1 significantly moves the positions of the nodes and antinodes in the lateral direction (X-axis direction).

[0087] Standing wave patterns 601, 604, and 607 have the same phase difference φ1 of 0°, but have different phase differences φ2. Standing wave patterns 602, 605, and 608 have the same phase difference φ1 of 90°, but have different phase differences φ2. Standing wave patterns 603, 606, and 609 have the same phase difference φ1 of 180°, but have different phase differences φ2. As can be seen from these standing wave patterns, a change in phase difference φ2 significantly moves the positions of the nodes and antinodes in the vertical direction (Y-axis direction).

[0088] In this way, the node positions can be continuously changed in the horizontal direction (X-axis direction) by changing the phase difference φ1 of the three oscillators 105. Also, the node and antinode positions can be continuously changed in the vertical direction (Y-axis direction) by changing the phase difference φ2. Therefore, by controlling the phase difference of the oscillators 105, the node positions of the standing wave can be continuously controlled with higher accuracy.

[0089] Fig. 13 shows a simulation result of a change in a standing wave pattern in an example configuration (see, for example, Fig. 4) in which four transducers 105 are arranged on the tactile presentation panel 100 and the entire area of ​​the outer peripheral edge of the tactile presentation panel 100 is an absorption edge area. The frequency of the four transducers 105 is constant at 1760 Hz. Fig. 11 shows standing wave patterns 651 to 660, which show a change in the standing wave pattern with a change in the phase difference between the four transducers 105. As shown in the standing wave patterns 651 to 660, the standing wave has a mesh-like pattern.

[0090] The standing wave pattern 651 shows four transducer positions 661A, 661B, 661C, and 661D. In the other standing wave patterns 652 to 660, the reference symbols for the transducer positions 661A, 661B, 661C, and 661D are omitted. In the standing wave patterns 651 to 655, a circle 671 shows the position of one antinode. In the standing wave patterns 656 to 660, a circle 672 shows the position of another antinode. For the sake of explanation, there is a 90° difference between the orientations of the standing wave patterns 651 to 655 and the orientations of the standing wave patterns 656 to 660.

[0091] The positions 661A to 661D of the transducers are at the vertices of an imaginary quadrangle. In the example shown in Fig. 13, the positions 661A to 661D are the vertices of a rectangle. The positions 661A to 661D are in the vicinity of the corners of the tactile presentation panel 100. Note that the positions of the three transducers may be any position as long as they are the vertices of a triangle, and are not limited to the example shown in Fig. 12.

[0092] The phase difference between the transducer at position 661A and the transducer at position 661B is φ1, the phase difference between the transducer at position 661A and the transducer at position 661C is φ2, and the phase difference between the transducer at position 661A and the transducer at position 661D is φ1+φ2. As described above, the frequency fc of the carrier waves of the four transducers is 1760 Hz.

[0093] In the standing wave patterns 651 to 655, the phase difference φ2 is common to 0°, but the phase difference φ1 is different. Specifically, the phase differences φ1 of the standing wave patterns 651 to 655 are 0°, 45°, 90°, 135°, and 180°, respectively. In the standing wave patterns 656 to 660, the phase difference φ1 is common to 180°, but the phase difference φ2 is different. Specifically, the phase differences φ2 of the standing wave patterns 656 to 660 are 0°, 45°, 90°, 135°, and 180°, respectively.

[0094] As can be seen from standing wave patterns 651 to 655, the node positions change continuously in the vertical direction (Y-axis direction) as the phase difference φ1 changes. Also, as can be seen from standing wave patterns 656 to 660, the node positions change continuously in the horizontal direction (X-axis direction) as the phase difference φ2 changes. Therefore, by controlling the phase difference of transducer 105, the node positions of the standing waves can be continuously controlled with higher accuracy.

[0095] Figure 14 shows the results of a simulation of the change in the standing wave pattern with the change in frequency of the four transducers in an example configuration (see, for example, Figure 4) in which four transducers 105 are arranged on a tactile presentation panel 100 and the entire area of ​​the outer peripheral edge of the tactile presentation panel 100 is an absorption edge area.

[0096] 14, standing wave patterns 681 to 685 show the change in the standing wave pattern when the phase difference between the four transducers 105 is 0° and the frequency changes stepwise from 1760 Hz to 753 Hz. The standing wave patterns 681 to 685 show the standing wave patterns with frequencies of 1760 Hz, 1383 Hz, 1089 Hz, 885 Hz, and 753 Hz, respectively.

[0097] As shown in the standing wave patterns 681 to 685, the standing wave has a mesh pattern. As can be seen from FIG. 14, the intervals between the nodes widen in the horizontal direction (X-axis direction) and vertical direction (axial direction) as the frequency decreases, and narrow mainly as the frequency increases. In this way, by changing the frequency of the oscillator 105, the positions of the nodes and antinodes can be changed continuously. By controlling both the phase difference and the frequency of the four oscillators, it becomes possible to more accurately control the tactile presentation position and the tactile non-presentation position.

[0098] 15 shows a simulation result of a change in a standing wave pattern accompanying a change in the phase difference between two vibrators 105 in the configuration example described with reference to Figs. 1A and 1B. In the configuration example described with reference to Figs. 1A and 1B, the entire outer peripheral edge of the rectangular tactile presentation panel 100 is an absorption edge region.

[0099] 15, standing wave patterns 701 to 705 show the change in standing wave pattern when the frequency of the two transducers 105 is 1760 Hz and the phase difference is changed stepwise from 0° to 180°. The standing wave patterns 701 to 705 show standing wave patterns with phase differences of 0°, 45°, 90°, 135°, and 180°, respectively.

[0100] In the standing wave pattern 701, positions 711A and 711B indicate the positions where the transducers are arranged. A circle 721 indicates the position of one antinode. In the standing wave patterns 702 to 705, the reference symbols for the positions 711A and 711B are omitted.

[0101] As can be seen from Fig. 15, the position of circle 721 moves to the left in Fig. 15 as the phase difference increases. Similarly, the position of the node moves to the left as the phase difference increases. In this way, by changing the phase difference of oscillator 105, the positions of the node and antinode can be changed continuously.

[0102] Fig. 16 shows a simulation result of the change in the standing wave pattern accompanying the change in the frequency of the two oscillators 105 in the configuration example described with reference to Figs. 1A and 1B. In Fig. 16, standing wave patterns 751 to 754 show the change in the standing wave pattern when the phase difference between the two oscillators 105 is 0° and the frequency changes stepwise from 1760 Hz to 753 Hz. Standing wave patterns 751 to 755 show standing wave patterns with frequencies of 1760 Hz, 1383 Hz, 1089 Hz, 885 Hz, and 753 Hz, respectively.

[0103] In the standing wave pattern 751, positions 711A and 711B indicate the positions where the transducers are arranged. A circle 722 indicates the position of one node. In the standing wave patterns 752 to 755, the reference numerals for the positions 711A and 711B are omitted.

[0104] As can be seen from Fig. 16, the position of circle 722 moves downward as the frequency decreases. The interval between the nodes widens in the horizontal direction (X-axis direction) as the frequency decreases, and narrows mainly as the frequency increases. In this way, by changing the frequency of oscillator 105, the interval between the nodes and antinodes can be continuously changed, and their positions can be continuously changed. By controlling the phase difference and frequency of oscillator 105, the positions of the nodes of the standing wave can be continuously controlled with higher precision.

[0105] The absorptance of the absorption edge region is explained below. The absolute value of the reflectance of the absorption edge propagating wave can be reduced. The most effective absorption edge has a reflectance of 0 (absorbance of 100) for the propagating wave. The most effective reflectance of the fixed end propagating wave is -1, and the most effective reflectance of the free end propagating wave is 1. A negative reflectance means that the phase of the reflected wave is opposite to the phase of the incident wave, that is, the direction of displacement is opposite. The absorptance of the absorption edge region in the embodiments of this specification may be less than 100.

[0106] As described above, by changing the phase difference or frequency of the vibrator, the positions of the node and antinode can be continuously changed within the touch target area 104. In addition, by combining the frequency and phase difference of the vibrator, it is possible to assign a node and an antinode to two points within the touch target area 104. If the maximum value of the node amplitude does not exceed the minimum value of the antinode amplitude in any combination of positions within the touch target area 104, the maximum value of the node can be controlled to be less than the tactile discrimination threshold, and tactile localization at any position within the touch target area 104 is possible.

[0107] Fig. 17 shows the results of a simulation of an example configuration in which the entire area of ​​the four vibrators and the outer peripheral edge is the absorption edge area, as described with reference to Figs. 4, 13, and 14. In the simulation, for each combination of different frequencies and different absorptances, the phase difference φ2 was kept at 0 and the phase difference φ1 was changed from 0° to 360°. As the absorptances decreased, the area in which the maximum value of the node was smaller than the minimum value of the antinode (defined as the tactile presentation possible area) became smaller for any combination of positions.

[0108] As shown in Fig. 17, at a frequency of 1760Hz, when the absorption rate is between 100% and 70%, the difference between the amplitude of the antinode and the amplitude of the node is large, so that it is possible to localize the area that actually presents the tactile sensation at any position. When the absorption rate is 60% or less, the amplitude of the node becomes large near the position of the vibrator at this frequency, approaching the minimum value of the amplitude of the antinode. Even in this case, by setting the center of the tactile presentation panel 100 as the touch target area 104, it is possible to localize the tactile sensation within it.

[0109] When the absorption rate is further decreased to 30% or less, the area where tactile sensation can be presented becomes even narrower and impractical. At an absorption rate of 10% or less, tactile sensation can be localized only in the center of the tactile presentation panel 100. At an absorption rate of 100% to 60%, the difference between the amplitude of the antinode and the amplitude of the node is large inside the transducer, so tactile sensation can be localized at any position.

[0110] At a frequency of 615 Hz, when the absorption rate is between 100% and 30%, the difference between the antinode amplitude and the node amplitude is large, so it is possible to localize the area that actually presents tactile sensation at any position. When the absorption rate decreases further to 10% or less, the area where tactile sensation can be presented becomes even narrower and it becomes impractical.

[0111] Fig. 18 shows the results of a simulation of an example configuration in which the entire area of ​​the three vibrators and the outer peripheral edge is the absorption edge area, as described with reference to Figs. 3 and 12. In the simulation, for each combination of different frequencies and different absorptances, the phase difference φ1 was kept at 0 and the phase difference φ2 was changed from 0° to 360°. As the absorptances decreased, the area in which the maximum value of the node was smaller than the minimum value of the antinode (defined as the tactile presentation possible area) became smaller for any combination of positions.

[0112] As shown in Fig. 18, at frequencies of 1760 Hz and 1057 Hz, when the absorption rate is between 100% and 30%, the difference between the amplitude of the antinode and the amplitude of the node is large, so that it is possible to localize the area where the tactile sensation is actually presented at any position. When the absorption rate is further reduced to 10% or less, the area where the tactile sensation can be presented becomes even narrower and is no longer practical.

[0113] Although the embodiments of the present application have been described above, the present disclosure is not limited to the above embodiments. A person skilled in the art can easily change, add, or convert each element of the above embodiments within the scope of the present disclosure. It is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. [Explanation of symbols]

[0114] 10 Tactile presentation device 100 Tactile display panel 101 Touch electrode pattern 102 Insulating substrate 103 Display device 104 Touch target area 105 Transducer 107 Fixing member 108 Vibration absorbing material 201 Control device 203 Waveform synthesizer

Claims

1. A tactile presentation device, comprising: a panel including an area subject to touch by a user; A plurality of transducers disposed on the panel outside the target area; A drive control device that applies a drive signal to the transducer; Including, At least a portion of the entire outer peripheral edge of the panel is an absorbent edge region; a position closest to each of the plurality of transducers at the entire outer peripheral edge of the panel is included in the absorption edge region; The drive control device applies drive signals to the plurality of transducers to form standing waves in the target area; the drive signal is a composite wave of a carrier wave and a modulated wave having a lower frequency than the carrier wave, The drive control device controls a position of a node of a standing wave in the target area by a phase difference of a carrier wave of the drive signal of the plurality of transducers. Tactile presentation device.

2. The tactile presentation device according to claim 1 , The drive control device changes a position of a node of a standing wave in the target area by changing a frequency and a phase difference of a carrier wave of the drive signal of the plurality of transducers. Tactile presentation device.

3. The tactile presentation device according to claim 1 , The vibration absorption rate of the absorption edge region is 40% or more. Tactile presentation device.

4. The tactile presentation device according to claim 1 , The vibration absorption rate of the absorption edge region is 70% or more. Tactile presentation device.

5. The tactile presentation device according to claim 1 , the drive control device controls the vibration of the plurality of transducers so that a minimum amplitude of an antinode of the standing wave is greater than a maximum amplitude of a node in the target region. Tactile presentation device.

6. The tactile presentation device according to claim 1 , The viewing angle of the absorption edge region from any point in the target region is 180° or more. Tactile presentation device.

7. The tactile presentation device according to claim 1 , A region other than the absorption end region in the entire periphery of the panel is a fixed end region, The drive control device changes a position of a node of a standing wave in the target area by changing a frequency and a phase difference of a carrier wave of the drive signal of the plurality of transducers. Tactile presentation device.

8. The tactile presentation device according to claim 1 , the entire peripheral edge of said panel being an absorbent edge region; the plurality of transducers is three or more transducers, The drive control device changes a position of a node of a standing wave in the target area by changing a frequency and a phase difference of a carrier wave of the drive signal of the plurality of transducers. Tactile presentation device.

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