JP6904222B2 - Drive control device, electronic device, and drive control method - Google Patents

Description

The present invention relates to a drive control device, an electronic device, and a drive control method.

Conventionally, it is a mobile terminal provided with a touch panel and the touch panel and having a display unit for displaying a cursor that moves in response to a touch operation. Some mobile terminals have a calculation unit that calculates the display position of the cursor.

A storage unit that stores the display position calculated by the calculation unit, an update unit that updates the display of the cursor based on the display position calculated by the calculation unit, and a storage unit that stores the touch position when the touch position changes. A distance determination unit for determining whether the distance between the previous display position and the current display position is larger than the threshold value is further provided.

When it is determined that the distance between the previous display position and the current display position is larger than the threshold value, the object display unit further includes an object display unit that displays an object indicating the previous position of the cursor at the previous display position. When it is not determined that the distance from the current display position is larger than the threshold value, the object is not displayed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-123243

By the way, the conventional mobile terminal does not provide a tactile sensation according to the movement of the touch position (position of operation input).

Therefore, it is an object of the present invention to provide a drive control device, an electronic device, and a drive control method that can provide a good tactile sensation according to the movement of the position of an operation input.

The drive control device according to the embodiment of the present invention has a display unit, a top panel arranged on the display surface side of the display unit and having an operation surface, and a position for detecting the position of an operation input performed on the operation surface. Drives the first vibrating element and the second vibrating element of an electronic device including a detection unit, a first vibrating element that generates vibration on the operating surface, and a second vibrating element that generates vibration on the operating surface. It is a drive control device, and is a cursor control unit that displays a cursor on the display unit according to the position of an operation input performed on the operation surface. The cursor is moved according to the movement of the position of the operation input. A cursor control unit that moves the position to be displayed and a first drive control unit that drives the first vibrating element with a first drive signal that generates natural vibration of an ultrasonic band on the operation surface. The first vibration element is driven by the first drive signal in which the intensity of the natural vibration decreases as the operation input of is started at the first point and moves to the second point at a predetermined distance from the first point. When the position of the first drive control unit and the operation input reaches the second point, the second vibration is generated by the second drive signal that generates a vibration in a frequency band that can be detected by a human sensory organ on the operation surface. It includes a second drive control unit that drives the element.

It is possible to provide a drive control device, an electronic device, and a drive control method that can provide a good tactile sensation according to the movement of the position of an operation input.

It is a perspective view which shows the electronic device 100 of an embodiment. It is a top view which shows the electronic device 100 of embodiment. It is a figure which shows the AA arrow cross section of the electronic device 100 shown in FIG. It is a figure which shows the crest of the standing wave generated in the top panel 120 by the natural vibration of an ultrasonic band. It is a figure explaining how the dynamic friction force applied to a fingertip changes. It is a figure which shows an example of the display of the electronic device 100. It is a figure which shows the structure of the electronic device 100 of an embodiment. It is a figure which shows the relationship between the operation of the cursor 160A by the operation tool 160B, and the vibration intensity by driving the vibrating element 140 and LRA180. It is a figure explaining the tactile sensation provided to the fingertip of a user by the vibration of a vibrating element 140 and LRA180. It is a flowchart which shows the process which the drive control apparatus 300 executes. It is a figure which shows the amplitude data by the modification of embodiment. It is a figure which shows the operation tool 160B by the modification of embodiment.

Hereinafter, the drive control device, the electronic device, and the embodiment to which the drive control method of the present invention is applied will be described.

<Embodiment>
FIG. 1 is a perspective view showing the electronic device 100 of the embodiment.

The electronic device 100 is, for example, a smartphone terminal, a tablet computer, a game machine, or the like having a touch panel as an input operation unit. Since the electronic device 100 may be a device having a touch panel as an input operation unit, it is a device installed and used in a specific place such as a portable information terminal or an ATM (Automatic Teller Machine). You may. Further, the electronic device 100 may be an in-vehicle input device.

The input operation unit 101 of the electronic device 100 has a display panel arranged under the touch panel, and the display panel has various buttons 102A by GUI (Graphic User Interface), sliders 102B, etc. (hereinafter, GUI operation unit 102). Is displayed).

The user of the electronic device 100 usually touches the input operation unit 101 with his / her fingertip to operate the GUI operation unit 102. Further, the electronic device 100 has a speaker 103. The speaker 103 is an example of an audio output unit.

Next, a specific configuration of the electronic device 100 will be described with reference to FIG.

FIG. 2 is a plan view showing the electronic device 100 of the embodiment, and FIG. 3 is a view showing a cross section taken along the line AA of the electronic device 100 shown in FIG. Note that, in FIGS. 2 and 3, an XYZ coordinate system, which is a Cartesian coordinate system, is defined as shown in the figure.

The electronic device 100 includes a housing 110, a top panel 120, double-sided tape 130, a vibrating element 140, a touch panel 150, a display panel 160, a substrate 170, and an LRA (Linear Resonant Actuator) 180.

The housing 110 is made of resin, for example, and as shown in FIG. 3, the LRA 180, the substrate 170, the display panel 160, and the touch panel 150 are arranged in the recess 110A, and the top panel 120 is adhered by the double-sided tape 130. ing.

The top panel 120 is a thin flat member that is rectangular in a plan view, and is made of transparent glass or a plastic such as polycarbonate. The surface 120A (the surface on the positive direction side of the Z axis) of the top panel 120 is an example of an operation surface on which the user of the electronic device 100 inputs an operation.

In the top panel 120, the vibrating element 140 is adhered to the surface on the negative direction side of the Z axis, and the four sides in a plan view are adhered to the housing 110 by the double-sided tape 130. The double-sided tape 130 only needs to be able to adhere the four sides of the top panel 120 to the housing 110, and does not have to be rectangular as shown in FIG.

A touch panel 150 is arranged on the Z-axis negative direction side of the top panel 120. The top panel 120 is provided to protect the surface of the touch panel 150. In addition, another panel, a protective film, or the like may be provided on the surface of the top panel 120.

The top panel 120 vibrates when the vibrating element 140 is driven in a state where the vibrating element 140 is adhered to the surface on the negative direction side of the Z axis. In the embodiment, the top panel 120 is vibrated at the natural vibration frequency of the top panel 120 to generate a standing wave in the top panel 120. However, since the vibrating element 140 is adhered to the top panel 120, it is actually preferable to determine the natural vibration frequency in consideration of the weight of the vibrating element 140 and the like.

The vibrating element 140 is adhered to the surface of the top panel 120 on the negative side of the Z axis along the short side extending in the X-axis direction on the positive side of the Y axis. The vibrating element 140 may be any element capable of generating vibration in the ultrasonic band, and for example, an element including a piezoelectric element such as a piezo element can be used. The vibrating element 140 is an example of the first vibrating element.

The vibrating element 140 is driven by a drive signal (first drive signal) output from a drive control device described later. The amplitude (intensity) and frequency of the vibration generated by the vibrating element 140 are set by the drive signal (first drive signal). Further, the on / off of the vibrating element 140 is controlled by a drive signal (first drive signal).

The ultrasonic band refers to, for example, a frequency band of about 20 kHz or higher. In the electronic device 100 of the embodiment, the frequency at which the vibrating element 140 vibrates is equal to the frequency of the top panel 120, so that the vibrating element 140 vibrates at the natural frequency of the top panel 120. 1 Drive signal).

The touch panel 150 is arranged above the display panel 160 (on the Z-axis positive direction side) and below the top panel 120 (Z-axis negative direction side). The touch panel 150 is an example of a coordinate detection unit that detects a position where the user of the electronic device 100 touches the top panel 120 (hereinafter, referred to as an operation input position).

On the display panel 160 below the touch panel 150, various buttons and the like by GUI (hereinafter, referred to as GUI operation unit) are displayed. Therefore, the user of the electronic device 100 usually touches the top panel 120 with his or her fingertips in order to operate the GUI operation unit.

The touch panel 150 may be a coordinate detection unit capable of detecting the position of an operation input to the user's top panel 120, and may be, for example, a capacitance type or resistance film type coordinate detection unit. Here, a form in which the touch panel 150 is a capacitance type coordinate detection unit will be described. Even if there is a gap between the touch panel 150 and the top panel 120, the capacitance type touch panel 150 can detect the operation input to the top panel 120.

Further, although the form in which the top panel 120 is arranged on the input surface side of the touch panel 150 will be described here, the top panel 120 may be integrated with the touch panel 150. In this case, the surface of the touch panel 150 becomes the surface of the top panel 120 shown in FIGS. 2 and 3, and the operation surface is constructed. Further, the top panel 120 shown in FIGS. 2 and 3 may be omitted. Also in this case, the surface of the touch panel 150 constructs the operation surface. Further, in this case, the member having the operation surface may be vibrated by the natural vibration of the member.

When the touch panel 150 is a resistive film type, the touch panel 150 may be arranged on the top panel 120. Also in this case, the surface of the touch panel 150 constructs the operation surface. Further, the top panel 120 shown in FIGS. 2 and 3 may be omitted. Also in this case, the surface of the touch panel 150 constructs the operation surface. Further, in this case, the member having the operation surface may be vibrated by the natural vibration of the member.

The display panel 160 may be, for example, a display unit capable of displaying an image such as a liquid crystal display panel or an organic EL (Electroluminescence) panel. The display panel 160 is installed inside the recess 110A of the housing 110 on the substrate 170 (on the Z-axis positive direction side) by a holder or the like (not shown).

The display panel 160 is driven and controlled by a driver IC (Integrated Circuit) described later, and displays a GUI operation unit, images, characters, symbols, figures, and the like according to the operating status of the electronic device 100.

The substrate 170 is arranged inside the recess 110A of the housing 110. A display panel 160 and a touch panel 150 are arranged on the substrate 170. The display panel 160 and the touch panel 150 are fixed to the substrate 170 and the housing 110 by a holder or the like (not shown).

In addition to the drive control device described later, various circuits and the like necessary for driving the electronic device 100 are mounted on the substrate 170.

The LRA 180 is arranged in the recess 110A of the housing 110 as an example. The position of the LRA 180 in a plan view is substantially equal to that of the vibrating element 140 as an example. The LRA180 generates vibrations in a frequency band that can be perceived by human sensory organs. LRA180 is an example of the second vibrating element.

The LRA 180 is driven by a drive signal (second drive signal) output from a drive control device described later. The amplitude (intensity) and frequency of the vibration generated by the LRA 180 are set by the drive signal (second drive signal). Further, on / off of the LRA 180 is controlled by a drive signal (second drive signal).

The frequency band that can be perceived by human sensory organs is a frequency band of 150 Hz to 400 Hz. Humans can also detect vibrations in the frequency band lower than the frequency band of 150 Hz to 400 Hz and in the frequency band higher than the frequency band of 150 Hz to 400 Hz, but compared to the frequency band of 150 Hz to 400 Hz. If the intensity of vibration is not high, it will be difficult to detect. That is, the frequency band of 150 Hz to 400 Hz represents the frequency band of vibration that can be easily perceived by humans.

Here, as an example, the LRA 180 is driven by a drive signal of 350 Hz as vibration in a frequency band that can be perceived by human sensory organs. Such LRA180 is preferably one that can generate a displacement of, for example, about 100 μm to 1 mm.

When the LRA 180 is driven, vibration propagates from the housing 110 to the top panel 120, and vibration in a frequency band that can be perceived by human sensory organs can be provided to the fingertips of the user who touches the surface 120A of the top panel 120.

Here, a form in which the LRA 180 is arranged in the recess 110A of the housing 110 will be described. However, since the entire electronic device 100 vibrates when the LRA 180 is driven, the LRA 180 can be installed anywhere in the electronic device 100. Good. Further, here, a mode in which the LRA 180 is used as a vibrating element that generates vibration in a frequency band that can be perceived by human sensory organs will be described. If it is an actuator), it may be something other than LRA180.

In the electronic device 100 having the above configuration, when the user's finger comes into contact with the top panel 120 and the movement of the fingertip is detected, the drive control unit mounted on the substrate 170 drives the vibration element 140, and the top panel 120 Is oscillated at the frequency of the ultrasonic band. The frequency of this ultrasonic band is the resonance frequency of the resonance system including the top panel 120 and the vibrating element 140, and a standing wave is generated in the top panel 120. Further, in a predetermined case, the LRA 180 is vibrated to generate vibration in a frequency band that can be perceived by human sensory organs on the top panel 120.

The electronic device 100 provides a user with a tactile sensation through the top panel 120 by generating a standing wave in the ultrasonic band.

Next, a standing wave generated on the top panel 120 will be described with reference to FIG.

FIG. 4 is a diagram showing a wave front formed parallel to the short side of the top panel 120 among the standing waves generated on the top panel 120 by the natural vibration of the ultrasonic band, and FIG. 4 (A) is a side view. , (B) is a perspective view. In FIGS. 4A and 4B, XYZ coordinates similar to those in FIGS. 2 and 3 are defined. In FIGS. 4A and 4B, the amplitude of the standing wave is exaggerated for the sake of comprehension. Further, in FIGS. 4A and 4B, the vibrating element 140 is omitted.

Using the Young's modulus E, density ρ, Poisson's ratio δ, long side dimension l, thickness t of the top panel 120, and the period k of the standing wave existing in the long side direction, the natural frequency of the top panel 120 is used. (Resonance frequency) f is represented by the following equations (1) and (2). Since the standing wave has the same waveform in units of 1/2 cycle, the number of cycles k takes a value in 0.5 increments and becomes 0.5, 1, 1.5, 2, ....

なお、式（２）の係数αは、式（１）におけるｋ^２以外の係数をまとめて表したものである。

The coefficient α in the equation (2) is a collective representation of the coefficients other than ^{k 2 in the equation (1).}

The standing waves shown in FIGS. 4A and 4B are, for example, waveforms when the period number k is 10. For example, when Gorilla (registered trademark) glass having a long side length L of 140 mm, a short side length of 80 mm, and a thickness t of 0.7 mm is used as the top panel 120, the period number k is 10. In this case, the natural frequency f is 33.5 kHz. In this case, a drive signal having a frequency of 33.5 kHz may be used.

The top panel 120 is a flat plate-shaped member, but when the vibrating element 140 (see FIGS. 2 and 3) is driven to generate the natural vibration of the ultrasonic band, (A) and (B) of FIGS. 4 are obtained. By bending as shown, a standing wave of bending vibration is generated.

Here, a mode in which one vibrating element 140 is bonded along a short side extending in the X-axis direction on the Z-axis negative direction side surface of the top panel 120 and on the Y-axis positive direction side will be described. , Two vibrating elements 140 may be used. When two vibrating elements 140 are used, the other vibrating element 140 is adhered on the Z-axis negative side surface of the top panel 120, on the Y-axis negative direction side, along the short side extending in the X-axis direction. Just do it. In this case, the two vibrating elements 140 may be arranged so as to be axisymmetric with the center line parallel to the two short sides of the top panel 120 as the axis of symmetry.

Further, when driving the two vibrating elements 140, if the period number k is an integer, the mode is symmetric. Therefore, the two vibration elements 140 may be driven in the same phase, and the period number k is a decimal number (integer part and decimal part 0. In the case of (a number including 5), since it is an antisymmetric mode, it may be driven in the opposite phase.

FIG. 5 is a diagram for explaining how the dynamic friction force applied to the fingertips for performing operation input changes due to the natural vibration of the ultrasonic band generated in the top panel 120 of the electronic device 100. In FIGS. 5A and 5B, while the user touches the top panel 120 with his / her fingertip, he / she performs an operation input to move his / her finger from the back side to the front side of the top panel 120 along the arrow. The vibration is turned on / off by turning on / off the vibration element 140 (see FIGS. 2 and 3).

Further, in FIGS. 5A and 5B, in the depth direction of the top panel 120, the range touched by the finger while the vibration is off is shown in gray, and the range touched by the finger while the vibration is on is shown in white. ..

The natural vibration of the ultrasonic band occurs in the entire top panel 120 as shown in FIG. 4, but in FIGS. 5A and 5B, the user's finger is from the back side to the front side of the top panel 120. The operation pattern of switching the vibration on / off while moving to is shown.

Therefore, in FIGS. 5A and 5B, in the depth direction of the top panel 120, the range touched by the finger while the vibration is off is shown in gray, and the range touched by the finger while the vibration is on is white. Shown.

In the operation pattern shown in FIG. 5A, the vibration is turned off when the user's finger is on the back side of the top panel 120, and the vibration is turned on while the finger is moved to the front side.

On the other hand, in the operation pattern shown in FIG. 5B, the vibration is turned on when the user's finger is on the back side of the top panel 120, and the vibration is turned off while the finger is moved to the front side. There is.

Here, when the natural vibration of the ultrasonic band is generated in the top panel 120, an air layer due to the squeeze effect is interposed between the surface of the top panel 120 and the finger, and the surface of the top panel 120 is traced by the finger. The coefficient of dynamic friction decreases.

Therefore, in FIG. 5A, the dynamic friction force applied to the fingertip is large in the range shown in gray on the back side of the top panel 120, and the dynamic friction force applied to the fingertip is small in the range shown in white on the front side of the top panel 120. Become.

Therefore, as shown in FIG. 5A, the user who inputs the operation to the top panel 120 senses a decrease in the dynamic friction force applied to the fingertip when the vibration is turned on, and perceives the slipperiness of the fingertip. It will be. At this time, the user feels that a recess is present on the surface of the top panel 120 when the dynamic friction force is reduced by making the surface of the top panel 120 smoother.

On the other hand, in FIG. 5B, the dynamic friction force applied to the fingertip is small in the range shown in white on the back front side of the top panel 120, and the dynamic friction force applied to the fingertip is large in the range shown in gray on the front side of the top panel 120. Become.

Therefore, as shown in FIG. 5B, the user who inputs the operation to the top panel 120 senses an increase in the dynamic friction force applied to the fingertip when the vibration is turned off, and the fingertip is difficult to slip or slips. You will perceive the feeling of being caught. Then, when the dynamic friction force becomes high due to the fingertips becoming less slippery, it feels as if a convex portion exists on the surface of the top panel 120.

From the above, in the cases of (A) and (B) of FIG. 5, the user can feel the unevenness with his / her fingertips. Human perception of unevenness in this way is, for example, "Printed matter transfer method for tactile design and Sticky-band Illusion" (11th Society of Instrument and Control Engineers System Integration Division Lecture Proceedings (SI2010, Sendai) ____174 -177, 2010-12). It is also described in "Fishbone Tactile Illusion" (Proceedings of the 10th Annual Meeting of the Virtual Reality Society of Japan (September 2005)).

Although the change in the dynamic friction force when the vibration is switched on / off has been described here, the same applies when the amplitude (strength) of the vibrating element 140 is changed.

FIG. 6 is a diagram showing an example of a display of the electronic device 100. FIG. 6 shows the contours of the top panel 120, the touch panel 150, and the display panel 160, and the display of the display panel 160.

The text data, the image of the cursor 160A, and the image of the operation tool 160B are displayed on the display panel 160.

As an example, the cursor 160A is always displayed on the display panel 160. The cursor 160A may be selected from, for example, a mode that is always displayed on the display panel 160 and a mode that is displayed when the user inputs an operation to the top panel 120 with a fingertip or the like. .. However, here, when the operation input is not performed, the position on the Y-axis positive direction side (the position shown in FIG. 6) slightly from the center of the display panel 160 is displayed as the initial position.

Such a cursor 160A is moved within the display area of the display panel 160 by the user touching the operation tool 160B with a fingertip or the like to operate the operation tool 160B. The display area of the display panel 160 is the entire inside of the outline of the display panel 160 shown in FIG.

The operation tool 160B is an operation unit realized by a GUI, and is a circular operation unit having a home area 160B1 and an operation area 160B2. The operation tool 160B is translucent (highly transparent to some extent), and the display content of the display panel 160 can be seen through.

The home area 160B1 is a circular area located at the center of the operation tool 160B and has a size corresponding to a human fingertip. The home area 160B1 is an example of a first area representing a reference position where an operation input to the surface 120A of the top panel 120 is started.

The operation area 160B2 is an annular region surrounding the home area 160B1 and has a width such that a human fingertip can move in the radial direction of the operation tool 160B. The operation area 160B2 indicates a direction in which the cursor 160A can be moved.

Here, as an example, a mode in which four arrows are displayed in the operation area 160B2 with the cursor 160A as a movable direction is shown. The four arrows indicate the reference directions in which the cursor 160A can be moved, and point in the positive X-axis direction, the negative X-axis direction, the positive Y-axis direction, and the negative Y-axis direction. These four arrows indicate that the cursor 160A can be moved in any direction of 360 degrees.

The operation tool 160B is not displayed on the display panel 160 before the user touches the top panel 120 with a fingertip or the like (inputs an operation) while the power of the electronic device 100 is on, and the user touches the top panel 120 with the fingertip or the like. When the top panel 120 is touched (when an operation input is performed), the display is displayed at the touched position. Further, when the user moves his / her fingertip or the like away from the top panel 120 (when the operation input is stopped), the operation tool 160B is not displayed on the display panel 160.

More specifically, the operation tool 160B is displayed so that the home area 160B1 is located at a position where the user touches the top panel 120 with a fingertip or the like. If the user inputs an operation near the cursor 160A while the cursor 160A is in the initial position shown in FIG. 6, the cursor 160A is moved to a position that does not overlap with the operation tool 160B.

When the user inputs an operation to the top panel 120 and moves the fingertip while the operation tool 160B is displayed, the operation tool 160B does not move, so the fingertip moves from the home area 160B1 to the inside of the operation area 160B2. When the user moves the fingertip within the operation area 160B2, the cursor 160A is moved in the moving direction of the fingertip.

At this time, the electronic device 100 drives the vibrating element 140 to generate an air layer due to the squeeze effect between the user's fingertip and the top panel 120, and reduces the dynamic friction force applied to the fingertip. Then, when the user's fingertip reaches the outer circumference of the operation area 160B2, the electronic device 100 stops driving the vibrating element 140 and drives the LRA 180. This provides a predetermined tactile sensation to the user's fingertips. The predetermined tactile sensation provided to the fingertips of the user will be described later with reference to FIGS. 8 and 9.

The operation area 160B2 is an example of the second area. Further, when the fingertip moves in the radial direction inside the operation area 160B2, the point on the inner circumference of the annular operation area 160B2 is an example of the first point, and the point on the outer circumference is the second point. It is an example of points, and the radial width of the operation area 160B is an example of a predetermined distance between the first point and the second point.

Next, the configuration of the electronic device 100 of the embodiment will be described with reference to FIG. 7.

FIG. 7 is a diagram showing the configuration of the electronic device 100 of the embodiment.

The electronic device 100 includes a vibrating element 140, an amplifier 141, a touch panel 150, a driver IC (Integrated Circuit) 151, a display panel 160, a driver IC 161 and an LRA 180, an amplifier 181 and a control unit 200, a sine wave generator 310, and an amplitude modulator 320. including.

The control unit 200 includes an application processor 220, a drive control unit 240A, a drive control unit 240B, and a memory 250. The control unit 200 is realized by, for example, an IC chip.

Further, the application processor 220, the drive control unit 240A, the drive control unit 240B, the sine wave generator 310, and the amplitude modulator 320 construct the drive control device 300. Here, a mode in which the application processor 220, the drive control unit 240A, the drive control unit 240B, and the memory 250 are realized by one control unit 200 will be described, but the drive control unit 240A and / or the drive control unit The 240B may be provided as another IC chip or processor outside the control unit 200. In this case, among the data stored in the memory 250, the data required for the drive control of the drive control unit 240A and / or the drive control unit 240B is stored in a memory different from the memory 250. It may be provided inside the drive control device 300.

Further, the drive control device 300 may be treated as including only the cursor control unit 220A and the image control unit 220B of the application processor 220. Further, the cursor control unit 220A and the image control unit 220B may be provided outside the application processor 220.

In FIG. 7, the housing 110, the top panel 120, the double-sided tape 130, and the substrate 170 (see FIG. 2) are omitted. Further, here, the amplifier 141, the driver IC 151, the driver IC 161 and the LRA 180, the amplifier 181 and the drive control unit 240A, the drive control unit 240B, the memory 250, the sine wave generator 310, and the amplitude modulator 320 will be described.

The amplifier 141 is arranged between the drive control device 300 and the vibrating element 140, and amplifies the drive signal (first drive signal) output from the drive control device 300 to drive the vibrating element 140.

The driver IC 151 is connected to the touch panel 150, detects position data representing a position where an operation input is made to the touch panel 150, and outputs the position data to the control unit 200. As a result, the position data is input to the application processor 220 and the drive control unit 240A. The input of the position data to the drive control unit 240A is equivalent to the input of the position data to the drive control device 300.

The driver IC 161 is connected to the display panel 160, inputs drawing data output from the drive control device 300 to the display panel 160, and displays an image based on the drawing data on the display panel 160. As a result, the GUI operation unit, an image, or the like based on the drawing data is displayed on the display panel 160.

The amplifier 181 is arranged between the drive control device 300 and the LRA 180, and amplifies the drive signal (second drive signal) output from the drive control device 300 to drive the LRA 180.

The application processor 220 outputs drawing data representing a GUI operation unit, images, characters, symbols, figures, etc. necessary for operation by the user of the electronic device 100 to the driver IC 161. Further, the application processor 220 has a cursor control unit 220A and an image control unit 220B. The cursor control unit 220A controls the display of the cursor 160A described with reference to FIG. 6, and the image control unit 220B controls the display of the operation tool 160B.

The communication processor 230 executes processing necessary for the electronic device 100 to perform communication such as WiFi, Bluetooth (registered trademark), or non-contact short-range communication. When the electronic device 100 does not particularly communicate, the electronic device 100 does not have to include the communication processor 230.

When the user moves the fingertip while the operation tool 160B is displayed on the display panel 160, the drive control unit 240A outputs amplitude data representing the amplitude to the amplitude modulator 320. As a result, the top panel 120 vibrates due to the natural vibration of the ultrasonic band. The amplitude data is data representing an amplitude value for adjusting the strength of the drive signal used for driving the vibrating element 140. The amplitude data representing the amplitude may be stored in the memory 250.

The drive control unit 240A vibrates the vibrating element 140 when the user's fingertip starts to move and the moving speed becomes equal to or higher than a predetermined threshold speed. The movement speed may be calculated by the drive control unit 240A as the degree of time change of the position data.

Therefore, the amplitude value represented by the amplitude data output by the drive control unit 240A is zero when the moving speed is less than the predetermined threshold speed, and is predetermined according to the moving speed when the moving speed is equal to or higher than the predetermined threshold speed. Is set to the amplitude value of. When the moving speed is equal to or higher than a predetermined threshold speed, the higher the moving speed, the smaller the amplitude value is set, and the lower the moving speed, the larger the amplitude value is set.

Further, the drive control unit 240A stops driving the vibrating element 140 when the user's fingertip reaches the outer circumference of the operation area 160B2. The drive control unit 240A is an example of the first drive control unit.

When the user's fingertip reaches the outer circumference of the operation area 160B2, the drive control unit 240B drives the LRA 180 with a drive signal on the order of several tens of Hz. The drive control unit 240B drives the LRA 180 in a few milliseconds. Therefore, when the LRA 180 is driven by the drive control unit 240B, the top panel 120 generates a momentary and strong vibration with a squeaky feeling. The drive control unit 240B is an example of the second drive control unit.

The memory 250 stores data in which coordinate data representing a GUI operation unit or the like on which operation input is performed and pattern data representing amplitude data are associated with each other. Further, the memory 250 includes an image of the operation tool 160B (home area 160B1 and operation area 160B2), amplitude data used by the drive control unit 240A to drive the vibration element 140, and a drive signal used by the drive control unit 240B to drive the LRA 180. Store the data of.

The sine wave generator 310 generates the sine wave necessary to generate a drive signal for vibrating the top panel 120 at its natural frequency. For example, when the top panel 120 is vibrated at a natural frequency f of 33.5 kHz, the frequency of the sine wave is 33.5 kHz. The sine wave generator 310 inputs an ultrasonic band sine wave signal to the amplitude modulator 320.

The amplitude modulator 320 modulates the amplitude of the sine wave signal input from the sine wave generator 310 using the amplitude data input from the drive control unit 240A to generate a drive signal. As a basic operation, the amplitude modulator 320 modulates the amplitude of the sinusoidal signal in the ultrasonic band input from the sinusoidal generator 310, and generates a drive signal without modulating the frequency and phase.

Therefore, the drive signal output by the amplitude modulator 320 is an ultrasonic band sine wave signal that modulates only the amplitude of the ultrasonic band sine wave signal input from the sine wave generator 310. When the amplitude data is zero, the amplitude of the drive signal becomes zero. This is equivalent to the amplitude modulator 320 not outputting a drive signal.

FIG. 8 is a diagram showing the relationship between the operation of the cursor 160A by the operation tool 160B and the vibration intensity driven by the vibrating element 140 and the LRA 180. FIG. 9 is a diagram for explaining the tactile sensation provided to the fingertips of the user by the vibration of the vibrating element 140 and the LRA 180.

At time t1, when the user touches the top panel 120 with a fingertip as shown in FIG. 8 (A), the vibrating element 140 is driven and the vibration intensity becomes A1 as shown in FIG. 8 (D). This is the vibration intensity obtained by maximizing the amplitude data used for driving the vibration element 140.

After that, as shown in FIG. 8 (B), when the user moves the fingertip to the right inside the operation area 160B2, the amplitude data is linearly reduced as shown in FIG. 8 (D). As a result, the vibration intensity decreases linearly, and at time t2, the vibration intensity becomes about half that of A1.

Then, as shown in FIG. 8 (C), when the user further moves the fingertip further to the right inside the operation area 160B2, the amplitude data is continuously linearly reduced as shown in FIG. 8 (D). The vibration intensity decreases linearly, and at time t3, the fingertip reaches the outer circumference of the operation area 160B2. When the fingertip reaches the outer periphery of the operation area 160B2, the amplitude data becomes zero, so that the vibration intensity becomes zero, the LRA180 is driven, and the vibration intensity becomes A2 (> A1).

When the vibrating element 140 and the LRA 180 are driven in this way, the dynamic friction force linearly increases from time t1 to t3, and finally a large and instantaneous vibration is generated, so that the tactile sensation provided to the user's fingertip is provided. As shown in FIGS. 9A, 9B, and 9C, the tactile sensation is as if the rocker switch 500 was inverted.

That is, the state in which the user touches the top panel 120 with his / her fingertip at time t1 is the state in which he / she touches one side of the rocker switch 500 as shown in FIG. 9A, and when the fingertip is moved to the right from there, , The dynamic friction force applied to the fingertip increases linearly before and after the time t2. In this state, as shown in FIG. 9B, a feeling of resistance is provided to the fingertips, as in the middle of reversing the rocker switch 500.

Then, when the fingertip reaches the outer circumference of the operation area 160B2 at time t3, a momentary large click vibration is generated by the LRA 180. Therefore, as shown in FIG. 9C, the rocker switch 500 is completely inverted. A tactile sensation of the condition can be provided.

Here, as an example, a mode in which the LRA 180 is driven will be described assuming that the fingertip reaches the outer circumference of the operation area 160B2 when the movement distance of the fingertip becomes equal to the radial width of the operation area 160B2. That is, a mode in which the radial width of the operation area 160B2 as an image and the moving distance of the fingertip from the start of driving the vibrating element 140 to the driving of the LRA 180 will be described.

However, the radial width of the operation area 160B2 as an image and the moving distance of the fingertip from the start of driving the vibrating element 140 to the driving of the LRA 180 do not have to be equal.

It should be noted that the image data of the operation tool 160B as described above, the data representing the size of the image, the amplitude data used when driving the vibrating element 140 when the operation is performed inside the operation area 160B2, and the LRA180. The drive signal data used for driving may be stored in the memory 250.

FIG. 10 is a flowchart showing a process executed by the drive control device 300.

The drive control device 300 starts processing when the power of the electronic device 100 is turned on (start).

The drive control device 300 determines whether or not an operation input is being performed (step S1). The process of step S1 is a process in which the image control unit 220B determines whether or not the position data is output from the touch panel 150. In this state, the cursor 160A is displayed on the display panel 160.

When the drive control device 300 determines that the operation input is being performed (S1: YES), the drive control device 300 displays the operation tool 160B on the display panel 160 (step S2). More specifically, the process of step S2 is performed by the image control unit 220B. If it is determined that the operation input is being performed (S1: YES) while the operation tool 160B is displayed, the operation tool 160B is held in the displayed state.

The drive control device 300 determines whether or not the moving speed of the position data is equal to or higher than the threshold speed (step S3). The process of step S3 is performed by the drive control unit 240A.

When the drive control device 300 determines that the moving speed is equal to or higher than the threshold speed (S3: YES), the drive control device 300 drives the vibrating element 140 (step S4). More specifically, the drive control unit 240A drives the vibrating element 140 with a drive signal whose amplitude data decreases according to the moving distance. At this time, the cursor control unit 220A moves the cursor 160A in accordance with the movement of the operation input position.

The drive control device 300 determines whether or not the position data has reached the outer circumference (end) of the operation area 160B2 (step S5). The drive control unit 240A may determine whether or not the movement distance of the operation input reaches the width of the operation area 160B2 based on the position data output from the touch panel 150 and the data representing the width of the operation area 160B2. .. Alternatively, the drive control unit 240A compares the displayed coordinates of the operation area 160B2 with the position data output from the touch panel 150 to determine whether the movement distance of the operation input has reached the width of the operation area 160B2. It may be judged by.

When the drive control device 300 determines that the position data has reached the outer circumference of the operation area 160B2 (S5: YES), the drive control device 300 drives the LRA 180 (step S6). More specifically, the drive control unit 240B drives the LRA 180 for several milliseconds based on the determination result in step S5.

The drive control device 300 determines whether or not the position data is stopped on the outer circumference of the operation area 160B2 (step S7). More specifically, the image control unit 220B may determine whether or not the position data output from the touch panel 150 has moved after being determined to have reached the outer circumference of the operation area 160B2 in step S5. Alternatively, the image control unit 220B may determine whether or not the position data output from the touch panel 150 is equal to the coordinates of the outer circumference of the operation area 160B2 and is not moving.

When the drive control device 300 determines that the position data is stopped at the outer periphery of the operation area 160B2 (S7: YES), the drive control device 300 moves the cursor 160A (step S8). The direction in which the cursor 160A is moved is the direction in which the position of the operation input is moved inside the operation area 160B2. That is, when the position of the operation input is stopped on the outer circumference of the operation area 160B2, the cursor 160A is moved on the extension of the movement locus up to that point. More specifically, the process of step S8 is performed by moving the cursor 160A to the cursor control unit 220A when the image control unit 220B determines that the position data is stopped at the outer circumference of the operation area 160B2. ..

The drive control device 300 determines whether or not an operation input has been performed (step S9). More specifically, the image control unit 220B determines whether or not position data is output from the touch panel 150. This is because the cursor control unit 220A stops the movement of the cursor 160A when the operation input is no longer performed.

When the drive control device 300 determines that no operation input has been performed (S9: YES), the drive control device 300 stops the cursor 160A (step S10). More specifically, the process of step S10 is performed by the image control unit 220B causing the cursor control unit 220A to stop the movement of the cursor 160A.

The drive control device 300 determines whether or not to end the process (step S11). The process ends, for example, when the power of the electronic device 100 is turned off.

When the drive control device 300 determines that the processing is completed (S11: YES), the drive control device 300 ends a series of processing (end).

When the drive control device 300 determines in step S1 that no operation input has been performed (S1: NO), the drive control device 300 hides the operation tool 160B (step S12). The process of step S12 is performed by the image control unit 220B.

If it is determined that no operation input has been performed (S1: NO) while the operation tool 160B is hidden, the operation tool 160B is held in the hidden state. When the process of step S12 is completed, the drive control device 300 returns the flow to step S1.

Further, when the drive control device 300 determines in step S3 that the moving speed is not equal to or higher than the threshold speed (S3: NO), the drive control device 300 returns the flow to step S1. When the moving speed is not equal to or higher than the threshold speed, the position of the operation input is stopped and the vibrating element 140 is not driven, so that it is decided to return to step S1.

When the drive control device 300 determines in step S5 that the position data does not reach the outer circumference of the operation area 160B2 (S5: NO), the drive control device 300 returns the flow to step S1. If the position data does not reach the outer circumference of the operation area 160B2, the vibrating element 140 is continuously driven, so that the position data is returned to step S1.

When the drive control device 300 determines in step S7 that the position data has not stopped at the outer periphery of the operation area 160B2 (S7: NO), the drive control device 300 returns the flow to step S1. In order to prepare for the next operation input, it is decided to return to step S1.

When the drive control device 300 determines in step S9 that the operation input is being performed (S9: NO), the drive control device 300 returns the flow to step S7. Since the user wants to continue moving the cursor 160A, it is decided to return to step S7.

If the drive control device 300 determines in step S11 that the process is not completed (S11: NO), the drive control device 300 returns the flow to step S1. In order to prepare for the next operation input, it is decided to return to step S1.

As described above, according to the embodiment, when the user of the electronic device 100 operates the cursor 160A displayed on the display panel 160 with the operation tool 160B, when the fingertip moves the operation area 160B2, the vibrating element 140 is ultrasonically banded. It is driven by the drive signal of, and the dynamic friction force applied to the fingertip is gradually increased.

Then, when the user's fingertip reaches the outer circumference of the operation area 160B2, the electronic device 100 stops driving the vibrating element 140 and drives the LRA 180.

As a result, the dynamic friction force linearly increases as the fingertip moves in the operation area 160B2, and finally a large and instantaneous vibration is generated, so that the tactile sensation provided to the user's fingertip is smooth. Friction gradually increases while sliding, and it feels like it gets caught at the end. That is, the tactile sensation is as if the rocker switch 500 (see FIGS. 9A, 9B, and 9C) is inverted. Such a tactile sensation is provided from the surface 120A of the top panel 120 to the fingertips of the user.

Therefore, it is possible to provide a drive control device 300, an electronic device 100, and a drive control method that can provide a good tactile sensation.

Further, it is possible to provide a pseudo tactile sensation without providing the electronic device 100 with the real rocker switch 500. When the rocker switch 500 is actually attached to the electronic device 100, the portability may be sacrificed because the installation space is limited, especially in the case of the portable electronic device 100. In the embodiment, it is possible to provide a drive control device 300, an electronic device 100, and a drive control method without sacrificing portability.

In the above description, the form of providing the tactile sensation as if the rocker switch 500 was inverted has been described, but the tactile sensation as if the toggle switch may be used.

Further, in the above, the mode in which the LRA 180 is driven by the drive signal in the frequency band that can be perceived by the human sensory organ has been described. The vibrating element 140 may be driven by the driving signal of.

Further, as shown in FIG. 8D, the embodiment in which the amplitude data in which the amplitude is linearly reduced as the fingertip moves in the operation area 160B2 has been described above, but the amplitude data as shown in FIG. 11 has been described. May be used.

FIG. 11 is a diagram showing amplitude data according to a modified example of the embodiment. As shown in FIG. 11, amplitude data in which the amplitude is non-linearly reduced as the fingertip moves in the operation area 160B2 may be used.

Further, the image of the operation tool 160B may be highlighted as the fingertip moves in the operation area 160B2. FIG. 12 is a diagram showing an operation tool 160B according to a modified example of the embodiment. 12 (A) and 12 (C) show the same operation tools as the operation tools 160B shown in FIGS. 8 (A) to 8 (C). FIG. 12B shows an operation tool 160B obtained by dimming the operation tool 160B shown in FIGS. 12A and 12C.

For example, as shown in FIG. 12 (A), as the fingertip moves in the operation area 160B2, the operation tool 160B in the non-dark state shown in FIG. 12 (A) changes to the operation tool in the dark state shown in FIG. 12 (B). When the display is switched to 160B and the fingertip is further moved, the display may be switched again to the operation tool 160B in the non-darkened state shown in FIG. 12 (C).

Further, although the mode of switching between the non-darkened image and the darkened image as the highlighting has been described here, the highlighting may be performed by changing the color or the brightness of the operation tool 160B, for example.

Although the drive control device, the electronic device, and the drive control method according to the exemplary embodiment of the present invention have been described above, the present invention is not limited to the specifically disclosed embodiments. Various modifications and changes are possible without departing from the scope of claims.
The following additional notes will be further disclosed with respect to the above embodiments.
(Appendix 1)
Vibration is generated in the display unit, the top panel arranged on the display surface side of the display unit and having an operation surface, the position detection unit for detecting the position of the operation input performed on the operation surface, and the operation surface. A drive control device for driving the vibrating element of an electronic device including a vibrating element.
A cursor control unit that displays a cursor on the display unit according to the position of the operation input performed on the operation surface, and is a cursor that moves the position where the cursor is displayed according to the movement of the position of the operation input. Control unit and
A first drive control unit that drives the vibrating element with a first drive signal that generates natural vibration of an ultrasonic band on the operation surface. The operation input to the operation surface is started at a first point, and the first operation surface is started. A first drive control unit that drives the vibration element with the first drive signal whose natural vibration intensity decreases as it moves from one point to a second point at a predetermined distance.
When the position of the operation input reaches the second point, a second drive control unit that drives the vibration element with a second drive signal that generates vibration in a frequency band that can be sensed by human sensory organs on the operation surface. Including drive control device.
(Appendix 2)
The display unit, the top panel arranged on the display surface side of the display unit and having an operation surface, the position detection unit for detecting the position of the operation input performed on the operation surface, and the operation surface generate vibration. A drive control device for driving the first vibrating element and the second vibrating element of an electronic device including the first vibrating element and the second vibrating element that generates vibration on the operation surface.
A cursor control unit that displays a cursor on the display unit according to the position of the operation input performed on the operation surface, and is a cursor that moves the position where the cursor is displayed according to the movement of the position of the operation input. Control unit and
The first drive control unit that drives the first vibrating element with the first drive signal that generates the natural vibration of the ultrasonic band on the operation surface, and the operation input to the operation surface is started at the first point. A first drive control unit that drives the first vibrating element with the first drive signal whose natural vibration intensity decreases as it moves from the first point to a second point located at a predetermined distance.
When the position of the operation input reaches the second point, the second drive control that drives the second vibration element with the second drive signal that generates vibration in the frequency band that can be sensed by the human sensory organs on the operation surface. Drive control device including parts and parts.
(Appendix 3)
The drive control device according to Appendix 1 or 2, wherein the strength of the first drive signal decreases linearly or non-linearly as the position of the operation input moves from the first point to the second point.
(Appendix 4)
When the operation input to the operation surface is started at the first point, the first region representing the reference position and the periphery of the first region are surrounded at the position corresponding to the first point on the display unit. An image control unit that displays an image having a second area indicating a direction in which the cursor can move from the first area is further included.
The drive control device according to any one of Supplementary note 1 to 3, wherein the cursor control unit displays the cursor outside the first region and the second region.
(Appendix 5)
The drive control device according to Appendix 4, wherein the contour of the second region is a circle centered on the first point and having a radius of the predetermined distance.
(Appendix 6)
The drive control device according to Appendix 4 or 5, wherein the image control unit emphasizes the image when the position of the operation input reaches the second point.
(Appendix 7)
Display and
A top panel arranged on the display surface side of the display unit and having an operation surface,
A position detection unit that detects the position of the operation input performed on the operation surface, and
A vibrating element that generates vibration on the operation surface,
A cursor control unit that displays a cursor on the display unit according to the position of the operation input performed on the operation surface, and is a cursor that moves the position where the cursor is displayed according to the movement of the position of the operation input. Control unit and
A first drive control unit that drives the vibrating element with a first drive signal that generates natural vibration of an ultrasonic band on the operation surface. The operation input to the operation surface is started at a first point, and the first. A first drive control unit that drives the vibration element with the first drive signal whose natural vibration intensity decreases as it moves from one point to a second point at a predetermined distance.
When the position of the operation input reaches the second point, a second drive control unit that drives the vibration element with a second drive signal that generates vibration in a frequency band that can be sensed by a human sensory organ on the operation surface. Including electronic devices.
(Appendix 8)
Vibration is generated in the display unit, the top panel arranged on the display surface side of the display unit and having an operation surface, the position detection unit for detecting the position of the operation input performed on the operation surface, and the operation surface. A drive control method for driving the vibrating element of an electronic device including a vibrating element.
A cursor is displayed on the display unit according to the position of the operation input performed on the operation surface, and the position where the cursor is displayed is moved according to the movement of the position of the operation input.
When the vibrating element is driven by the first drive signal that generates the natural vibration of the ultrasonic band on the operation surface, the operation input to the operation surface is started at the first point and is a predetermined distance from the first point. The vibrating element is driven by the first drive signal in which the intensity of the natural vibration decreases as it moves to the second point at the position.
A drive control method in which when the position of the operation input reaches the second point, the vibration element is driven by a second drive signal that generates vibration in a frequency band that can be detected by a human sensory organ on the operation surface.

100 Electronic equipment 120 Top panel 140 Vibration element 150 Touch panel 160 Display panel 160A Cursor 160B Operation tool 160B1 Home area 160B2 Operation area 180 LRA
200 Control unit 220 Application processor 220A Cursor control unit 220B Image control unit 240A, 240B Drive control unit 250 Memory 300 Drive control device 310 Sine wave generator 320 Amplitude modulator

Claims (8)

Vibration is generated in the display unit, the top panel arranged on the display surface side of the display unit and having an operation surface, the position detection unit for detecting the position of the operation input performed on the operation surface, and the operation surface. A drive control device for driving the vibrating element of an electronic device including a vibrating element.
A cursor control unit that displays a cursor on the display unit according to the position of the operation input performed on the operation surface, and is a cursor that moves the position where the cursor is displayed according to the movement of the position of the operation input. Control unit and
A first drive control unit that drives the vibrating element with a first drive signal that generates natural vibration of an ultrasonic band on the operation surface. The operation input to the operation surface is started at a first point, and the first. A first drive control unit that drives the vibration element with the first drive signal whose natural vibration intensity decreases as it moves from one point to a second point at a predetermined distance.
When the position of the operation input reaches the second point, a second drive control unit that drives the vibration element with a second drive signal that generates vibration in a frequency band that can be sensed by human sensory organs on the operation surface. Including drive control device. The display unit, the top panel arranged on the display surface side of the display unit and having an operation surface, the position detection unit for detecting the position of the operation input performed on the operation surface, and the operation surface generate vibration. A drive control device for driving the first vibrating element and the second vibrating element of an electronic device including the first vibrating element and the second vibrating element that generates vibration on the operation surface.
A cursor control unit that displays a cursor on the display unit according to the position of the operation input performed on the operation surface, and is a cursor that moves the position where the cursor is displayed according to the movement of the position of the operation input. Control unit and
The first drive control unit that drives the first vibrating element with the first drive signal that generates the natural vibration of the ultrasonic band on the operation surface, and the operation input to the operation surface is started at the first point. A first drive control unit that drives the first vibrating element with the first drive signal whose natural vibration intensity decreases as it moves from the first point to a second point located at a predetermined distance.
When the position of the operation input reaches the second point, the second drive control that drives the second vibration element with the second drive signal that generates vibration in the frequency band that can be sensed by the human sensory organs on the operation surface. Drive control device including parts and parts. The drive control device according to claim 1 or 2, wherein the strength of the first drive signal decreases linearly or non-linearly as the position of the operation input moves from the first point to the second point. When the operation input to the operation surface is started at the first point, the first region representing the reference position and the periphery of the first region are surrounded at the position corresponding to the first point on the display unit. An image control unit that displays an image having a second area indicating a direction in which the cursor can move from the first area is further included.
The drive control device according to any one of claims 1 to 3, wherein the cursor control unit displays the cursor outside the first region and the second region. The drive control device according to claim 4, wherein the contour of the second region is a circle centered on the first point and having a radius of the predetermined distance. The drive control device according to claim 4 or 5, wherein the image control unit emphasizes the image when the position of the operation input reaches the second point. Display and
A top panel arranged on the display surface side of the display unit and having an operation surface,
A position detection unit that detects the position of the operation input performed on the operation surface, and
A vibrating element that generates vibration on the operation surface,
A cursor control unit that displays a cursor on the display unit according to the position of the operation input performed on the operation surface, and is a cursor that moves the position where the cursor is displayed according to the movement of the position of the operation input. Control unit and
A first drive control unit that drives the vibrating element with a first drive signal that generates natural vibration of an ultrasonic band on the operation surface. The operation input to the operation surface is started at a first point, and the first operation surface is started. A first drive control unit that drives the vibration element with the first drive signal whose natural vibration intensity decreases as it moves from one point to a second point at a predetermined distance.
When the position of the operation input reaches the second point, a second drive control unit that drives the vibration element with a second drive signal that generates vibration in a frequency band that can be sensed by a human sensory organ on the operation surface. Including electronic devices. The display unit, the top panel arranged on the display surface side of the display unit and having an operation surface, the position detection unit for detecting the position of the operation input performed on the operation surface, and the operation surface generate vibration. A drive control method for driving the vibrating element of an electronic device including a vibrating element.
A cursor is displayed on the display unit according to the position of the operation input performed on the operation surface, and the position where the cursor is displayed is moved according to the movement of the position of the operation input.
When the vibrating element is driven by the first drive signal that generates the natural vibration of the ultrasonic band on the operation surface, the operation input to the operation surface is started at the first point and the distance from the first point is predetermined. The vibrating element is driven by the first drive signal in which the intensity of the natural vibration decreases as it moves to the second point at the position.
A drive control method in which when the position of the operation input reaches the second point, the vibration element is driven by a second drive signal that generates vibration in a frequency band that can be detected by a human sensory organ on the operation surface.

Images