JP6920102B2 - Control device, input system and control method - Google Patents

Description

The present invention relates to control devices, input systems and control methods.

Conventionally, there is known an input system that gives a user a tactile sensation to recognize that an operation on the operation surface of the user's panel has been accepted. In such an input system, for example, when the operation surface of the panel is operated by the user, the vibrating element attached to the panel is vibrated to make the user recognize that the input operation has been accepted (for example, a patent). Reference 1).

Japanese Unexamined Patent Publication No. 2013-235614

However, for example, when the vibrating element is vibrated at a high frequency in the ultrasonic band and the user operates the operation surface of the panel that is ultrasonically vibrating, noise may be generated. In the prior art, there is room for improvement in suppressing such noise.

The present invention has been made in view of the above, and an object of the present invention is to provide a control device, an input system, and a control method capable of suppressing noise generated when a vibrating element is vibrated at a high frequency.

In order to solve the above problems and achieve the object, the present invention includes a drive unit in the control device. The drive unit drives a vibrating element attached to a panel having an operation surface to generate vibration in the panel. Further, the drive unit generates a sound having a frequency higher than the frequency of noise generated when the vibrating element is vibrated at a high frequency.

According to the present invention, it is possible to suppress noise generated when the vibrating element is vibrated at a high frequency.

FIG. 1 is a diagram showing a configuration example of an input system according to the first embodiment. FIG. 2 is a diagram illustrating a process performed on noise in the first embodiment. FIG. 3 is a diagram showing a configuration of an electronic device system having an input system according to the first embodiment. FIG. 4 is a diagram showing an arrangement example of the vibrating element according to the first embodiment. FIG. 5 is a diagram showing an example of suppressed sound information. FIG. 6 is a diagram showing a relationship between an input unit and a display device in an electronic device system. FIG. 7 is a flowchart showing an example of a processing procedure executed by the control unit. FIG. 8 is a diagram showing a configuration of an electronic device system having an input system according to a second embodiment. FIG. 9 is a flowchart showing an example of a processing procedure executed by the control unit according to the second embodiment. FIG. 10 is a diagram illustrating a process performed on noise in the third embodiment.

Hereinafter, embodiments of the control device, input system, and control method disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments shown below.

(First Embodiment)
<1. Input system control process>
FIG. 1 is a diagram showing a configuration example of the input system 1 according to the first embodiment. As shown in FIG. 1, the input system 1 according to the embodiment includes a panel 10, a vibration element 14, and a control device 20.

The panel 10 includes a support plate 11, a protective layer 12, and a contact sensor 13, and the contact sensor 13 and the protective layer 12 are sequentially laminated on the support plate 11. The protective layer 12 is formed of, for example, glass or a resin film, and the surface of the protective layer 12 is the operation surface 15 of the panel 10.

The contact sensor 13 is a sensor capable of detecting a contact position (hereinafter, may be referred to as a user contact position) of the panel 10 of the user U with the operation surface 15, and is, for example, a capacitive touch panel. The vibrating element 14 is attached to the panel 10 and vibrates based on the drive voltage output from the control device 20.

The control device 20 drives the vibrating element 14 to vibrate the panel 10 in response to the operation of the user U on the operation surface 15 of the panel 10 (hereinafter, may be referred to as a user operation). The control device 20 includes an operation detection unit 40 and a drive unit 41.

The operation detection unit 40 can detect the user operation based on the user contact position detected by the contact sensor 13 and the voltage output from the vibrating element 14 in a state where the drive unit 41 is not driven. User operations include, for example, a user U pressing operation on the operation surface 15 and a user U sliding operation on the operation surface 15. The pressing operation is an operation of pressing the operation surface 15, and the sliding operation is an operation of moving on the operation surface 15 (movement on the XY plane).

The vibrating element 14 is, for example, an electromechanical conversion element, and outputs a voltage corresponding to the pressure applied to the panel 10. The operation detection unit 40 detects the contact pressure of the user U on the operation surface 15 based on the voltage output from the vibrating element 14 in the undriven state.

The operation detection unit 40 detects the pressing operation of the user U when the contact pressure of the user U with the operation surface 15 is equal to or higher than a predetermined pressure value. Further, the operation detection unit 40 detects the slide operation of the user U when the user contact position moves by a predetermined distance or more.

The drive unit 41 drives the vibrating element 14 to vibrate the panel 10 based on the user operation detected by the operation detection unit 40.

For example, the drive unit 41 vibrates the vibrating element 14 at a high frequency in the ultrasonic band when a slide operation is detected by the operation detection unit 40. As a result, ultrasonic vibration is generated in the panel 10. By ultrasonically vibrating the panel 10, the frictional force of the operation surface 15 with respect to the user U can be reduced by utilizing the squeeze effect.

The squeeze effect is that when the operation surface 15 is ultrasonically vibrated by the vibrating element 14, air is drawn between the finger U1 of the user U and the operation surface 15 due to the pressure fluctuation due to the vibration to form an air layer, and the user U is formed. It refers to a phenomenon in which the frictional resistance between the finger U1 and the operation surface 15 is relatively low as compared with the case where there is no vibration.

Since the frictional force of the operation surface 15 of the panel 10 is reduced in this way, the finger U1 is moved on the operation surface 15 of the panel 10 and is sucked in the slide direction of the slide operation of the user U. It is possible to give a feeling of touch, and it is possible to improve the feeling of operation given to the user U.

By the way, when the user U operates the operation surface 15 of the panel 10 which is ultrasonically vibrated by the vibrating element 14, noise may be generated. FIG. 2 is a diagram illustrating a process performed on noise in the first embodiment.

As shown in the upper figure of FIG. 2, it is assumed that the vibrating element 14 is vibrated at a high frequency A in the ultrasonic band. The high frequency A is set to an arbitrary value, but here, for example, it is set to 30 kHz.

Then, as described above, when the operation surface 15 of the panel 10 that is ultrasonically vibrating is operated, noise of frequency B is generated. Since the frequency B is in the audible range, the noise is recognized by the user U as an abnormal sound. The frequency fa indicating the boundary between the audible range and the non-audible range (ultrasonic band) is, for example, 20 kHz.

As a result of diligent research on the above-mentioned noise, the present inventors have found that the frequency B of the noise is a fractional order, for example, 1/2 of the high frequency A of the vibration of the vibrating element 14. ..

Therefore, the control device 20 according to the present embodiment is designed to suppress noise based on the above findings. Specifically, the drive unit 41 of the control device 20 generates a sound from the panel 10 that satisfies the condition of the two-sound suppression effect in order to suppress noise.

Here, the two-sound suppression effect has a predetermined frequency and a predetermined sound pressure derived based on the frequency and sound pressure of the first sound with respect to the first sound (noise in this case) that has already been generated. When the second sound is generated, the user's auditory response to the first sound is suppressed. That is, by generating the second sound, the noise of the first sound can be made to be perceived as small by the user. Hereinafter, the second sound may be described as "suppressive sound".

Explaining the suppression sound with reference to the lower figure of FIG. 2, the drive unit 41 generates a suppression sound having a frequency C higher than the noise frequency B. The frequency C of the suppression sound is set to a value that satisfies the condition of the two-tone suppression effect (hereinafter, may be referred to as “suppression condition”) based on the noise frequency B and the sound pressure P. Further, the sound pressure Q of the suppression sound is also set to a value that satisfies the suppression condition. The setting of the frequency C and the sound pressure Q of the suppressed sound will be described later with reference to FIG.

As described above, in the present embodiment, by generating the suppression sound of the frequency C higher than the frequency B of the noise, the noise can be suppressed by the two-tone suppression effect of the suppression sound.

<2. Electronic device system configuration>
FIG. 3 is a diagram showing a configuration of an electronic device system 100 having an input system 1 according to the first embodiment. The electronic device system 100 shown in FIG. 3 is, for example, an in-vehicle system mounted on a vehicle, but is not limited to such an example, and may be a computer system including a PC (Personal Computer).

As shown in FIG. 3, the electronic device system 100 includes an input system 1, a control device 2, and a display device 3. The input system 1 accepts a user operation and notifies the control device 2 of information indicating the user operation. The control device 2 controls the screen displayed on the display device 3 according to the user operation.

The input system 1 includes an input unit 9 and a control device 20. As described above, the input unit 9 includes a panel 10 and a plurality of vibrating elements 14. The contact sensor 13 of the panel 10 is a sensor capable of detecting the contact position of the user U with the operation surface 15 of the panel 10, and is a capacitive touch panel as described above, but is a capacitive touch panel. It may be a contact sensor other than the above. For example, when the contact sensor 13 detects the contact pressure of the user U on the operation surface 15 of the panel 10, the contact sensor 13 can use a resistance pressure sensitive touch sensor.

The vibrating element 14 is attached to the front surface or the back surface of the panel 10. Such a vibrating element 14 is, for example, a piezo element, but when the contact sensor 13 is used as a pressure-sensitive sensor without detecting the user-operated pressure on the operating surface 15 of the panel 10 by the vibrating element 14, the vibrating element 14 may be used. It may be a linear resonance actuator or the like. Although not shown, the input unit 9 may include an amplification unit that amplifies the drive voltage output from the control device 20 and outputs the drive voltage to the vibrating element 14.

FIG. 4 is a diagram showing an arrangement example of the vibrating element 14 according to the present embodiment. In the example shown in FIG. 4, the input unit 9 includes four vibrating elements 14. Two of each of the four vibrating elements 14 are arranged at both ends of the panel 10. The number of the vibrating elements 14 is not limited to four, and may be three or less, or five or more. For example, the vibrating elements 14 may be arranged one by one at both ends of the panel 10.

Returning to the description of FIG. 3, the control device 20 includes a storage unit 21 and a control unit 22. The storage unit 21 stores the suppression sound information 30. The suppression sound information 30 is information used for setting the frequency C and the sound pressure Q of the suppression sound.

The control unit 22 includes an operation detection unit 40 and a drive unit 41. The operation detection unit 40 acquires detection information indicating the contact position of the user U with respect to the operation surface 15 detected by the contact sensor 13. Further, the operation detection unit 40 acquires the value of the output voltage output from the vibrating element 14 in a state where it is not driven by the drive unit 41, and based on the value of the output voltage, the operation detection unit 40 contacts the operation surface 15 of the user U. Detect pressure.

The operation detection unit 40 detects the user operation based on the information acquired from the contact sensor 13 and the detected contact pressure. Specifically, the operation detection unit 40 can detect various user operations such as a pressing operation on the operation surface 15 of the user U and a sliding operation. When the contact sensor 13 is a pressure-sensitive sensor, the operation detection unit 40 acquires information indicating the contact pressure from the contact sensor 13 to the operation surface 15 of the user U without using the output voltage of the vibrating element 14. You can also do it.

The operation detection unit 40 has a pressing operation on the operation surface 15 of the user U when the contact position with respect to the operation surface 15 of the user U is continuously in the same position and the contact pressure is equal to or higher than a predetermined pressure value. Can be determined.

Further, the operation detection unit 40 moves to the operation surface 15 of the user U when the contact position with respect to the operation surface 15 of the user U moves by a predetermined distance or more while the contact pressure with respect to the operation surface 15 of the user U is equal to or more than a predetermined pressure value. It can be determined that there is a slide operation of. The operation detection unit 40 can also determine that there is a slide operation when the contact position moves by a predetermined distance or more regardless of the contact pressure.

The drive unit 41 can drive the vibration element 14 to generate vibration in the panel 10 when a slide operation or a pressing operation is detected by the operation detection unit 40.

For example, the drive unit 41 can vibrate the vibrating element 14 at a high frequency in the ultrasonic band when the slide operation is detected by the operation detection unit 40. Specifically, when the slide operation is detected, the drive unit 41 generates a drive signal for high-frequency vibration and outputs a drive voltage corresponding to the drive signal to the vibrating element 14.

Such a drive voltage is a sinusoidal voltage having a high frequency (for example, 30 kHz) in the ultrasonic band, and when the drive voltage is applied to each vibrating element 14, each vibrating element 14 vibrates at a frequency in the ultrasonic band. Then, ultrasonic vibration is generated in the panel 10. As a result, the drive unit 41 can give the user U, for example, a slippery tactile sensation to improve the operability.

Further, the drive unit 41 can vibrate the vibrating element 14 at a low frequency lower than the high frequency of the ultrasonic band, for example, when a pressing operation is detected by the operation detection unit 40. Specifically, when the pressing operation is detected, the drive unit 41 generates a drive signal that vibrates at a low frequency, and outputs a drive voltage corresponding to the drive signal to the vibrating element 14.

Such a driving voltage is a sinusoidal voltage having a frequency in a low frequency band lower than the ultrasonic band (for example, a frequency of 200 Hz or less), and when the driving voltage is applied to each vibrating element 14, each vibrating element 14 Vibrates at a frequency in the low frequency band, and low frequency vibration is generated in the panel 10. As a result, the drive unit 41 can give the user U a click feeling with a click, for example, and can improve the operation feeling given to the user U.

As described above, when the vibrating element 14 is vibrated at a high frequency in the ultrasonic band, noise is generated. Therefore, the drive unit 41 acquires the suppression sound information 30 and generates a suppression sound with respect to the noise.

The suppression sound information 30 will be described with reference to FIG. FIG. 5 is a diagram showing an example of the suppression sound information 30, but is not limited thereto. As described above, the frequency and sound pressure of the suppression sound are set to values that satisfy the suppression condition based on the frequency of noise and the like.

The frequency or the like that satisfies the suppression condition is, for example, a region shown by a diagonal line in FIG. FIG. 5 is a graph in the case of noise of frequency B and sound pressure P, and the suppression condition is satisfied in the first region 50H on the high frequency side and the second region 50L on the low frequency side with respect to the frequency B. be. The graph shown in FIG. 5 can be obtained in advance through experiments, calculations, and the like.

If the suppression sound is set to a frequency within the first and second regions 50H and 50L, a two-tone suppression effect on noise can be obtained, but the drive unit 41 of the present embodiment is a white square. As shown in, the frequency and sound pressure are set using the first region 50H. Specifically, the suppression sound is set to, for example, a frequency C higher than the noise frequency B and lower than the high frequency A of the vibrating element 14 (see the lower figure of FIG. 2).

Thereby, in the present embodiment, noise can be suppressed more effectively. That is, since the second region 50L is a region on the low frequency side with respect to the noise in the audible region, the suppressed sound set to the frequency or the like in the second region 50L is easy for the user to hear, and as a result, the noise is suppressed. The effect may be reduced.

On the other hand, in the present embodiment, the suppression sound itself is used by using the suppression sound set to the frequency within the first region 50H on the higher frequency side than the noise, in other words, the side closer to the non-audible region. Can be made difficult for the user to hear. Then, in the present embodiment, noise can be suppressed more effectively by using a suppressing sound that is difficult for the user to hear.

In the example shown in the lower figure of FIG. 2, the frequency C is set in the audible range, but the frequency C is not limited to this and may be in the non-audible range.

Further, since the high frequency A of the vibration of the vibrating element 14 is known and the frequency B of the noise is also 1/2 of the high frequency A, the frequency of the suppression sound satisfying the suppression condition with respect to the noise of the frequency B. And sound pressure may be calculated in advance. Then, the calculated information indicating the frequency and sound pressure of the suppressed sound may be stored in the storage unit 21 as the suppressed sound information 30.

Then, the drive unit 41 vibrates the vibrating element 14 to generate a suppression sound of the set frequency C from the panel 10. Specifically, the drive unit 41 generates a vibration drive signal that generates a suppression sound of frequency C, and outputs a drive voltage corresponding to the drive signal to the vibration element 14. When such a driving voltage is applied to each vibrating element 14, each vibrating element 14 vibrates at a frequency C, and a suppression sound is generated from the panel 10.

Thereby, in the present embodiment, the panel 10 can be used as a sound source of the suppression sound. Further, the noise can be effectively suppressed by generating the suppression sound from the panel 10 where the noise is generated.

When the suppression sound is generated from the panel 10, the drive unit 41 may superimpose the drive signal that generates the suppression sound on the drive signal that vibrates the vibrating element 14 at a high frequency A. In other words, the drive unit 41 may superimpose the sound signal of the suppression sound on the drive signal to be driven at the high frequency A, and combine the sound signal with the drive signal.

Specifically, the drive unit 41 may superimpose the drive signal and output the drive voltage corresponding to the superposed drive signal to the vibrating element 14. By applying such a driving voltage to each vibrating element 14, the driving unit 41 can simultaneously generate a vibration for the tactile sensation of the user U and a vibration for outputting a suppression sound on the panel 10.

Further, when the vibration for the tactile sensation and the vibration for the suppression sound are generated at the same time, if the intensity of the vibration for the suppression sound is relatively large, there is a possibility that the tactile sensation of the user is lowered, for example. ..

Therefore, when the drive unit 41 simultaneously generates the vibration for the tactile sensation and the vibration for the suppression sound, the drive unit 41 limits the vibration intensity of the vibration element 14 when generating the suppression sound to be equal to or less than the specified value. You may. The above-mentioned specified value can be set to an arbitrary value, but for example, it is set to a value obtained by multiplying the intensity when the vibrating element 14 is vibrated at a high frequency A by a predetermined ratio (for example, 5%). You may.

As a result, even when the vibration for the tactile sensation and the vibration for the suppression sound are generated at the same time, the influence of the vibration for the suppression sound on the tactile sensation of the user can be suppressed.

In the above, the drive unit 41 vibrates the vibrating element 14 at a high frequency when a slide operation is detected, but the present invention is not limited to this, and for example, vibration at a high frequency and vibration at a low frequency. The vibrating element 14 may be driven so as to switch between. This makes it possible to give the user a smooth tactile sensation, a click sensation, a rough tactile sensation, and the like.

Further, when the driving unit 41 drives the vibrating element 14 so as to switch between the vibration at a high frequency and the vibration at a low frequency, the intensity of the vibration of the vibrating element 14 when generating the above-mentioned suppression sound is increased. The restriction of being less than or equal to the specified value may be lifted.

That is, when the vibration mode of the vibrating element 14 is switched between a high frequency and a low frequency, the influence of the vibration due to the suppression sound on the user's tactile sensation is relatively small, so that the above limitation may be released. As a result, the processing load of the drive unit 41 can be reduced.

As shown in FIG. 6, the electronic device system 100 may include a touch panel display in which the input unit 9 and the display device 3 are integrated. FIG. 6 is a diagram showing the relationship between the input unit 9 and the display device 3 in the electronic device system 100. As shown in FIG. 6, the display device 3 is arranged on the back surface of the panel 10, and the user U can see the screen displayed on the display device 3 through the panel 10.

In the example shown in FIG. 3, the control device 2 and the control device 20 are separately configured, but the function of the control device 2 can be added to the control device 20. In this case, the control device 2 is connected to the input unit 9 and also to the display device 3, so that the display device 3 can display a screen corresponding to the operation of the input unit 9.

<3. Processing by the control device 20 of the input system 1>
Next, an example of the flow of processing executed by the control unit 22 of the control device 20 will be described. FIG. 7 is a flowchart showing an example of a processing procedure executed by the control unit 22, and is a process that is repeatedly executed.

As shown in FIG. 7, the control unit 22 determines whether or not there is a slide operation by the user U (step S10). When the control unit 22 determines that there is a slide operation (step S10, Yes), the control unit 22 generates a drive signal that vibrates the vibrating element 14 at a high frequency (step S11).

Subsequently, the control unit 22 generates a vibration drive signal that generates a suppression sound of frequency C (step S12). Next, the control unit 22 superimposes a vibration drive signal (sound signal of the suppression sound) that generates the suppression sound on the drive signal that vibrates the vibration element 14 at the high frequency A, and the drive voltage corresponding to the superimposed drive signal. Is applied to the vibrating element 14 (step S13). As a result, the panel 10 generates high-frequency vibration for the tactile sensation of the user U and vibration for outputting the suppression sound.

On the other hand, when the control unit 22 determines that there is no slide operation (steps S10 and No), the control unit 22 determines whether or not there is a pressing operation by the user U (step S14). When the control unit 22 determines that there is a pressing operation (step S14, Yes), the control unit 22 generates a drive signal that vibrates the vibrating element 14 at a low frequency (step S15).

Subsequently, the control unit 22 applies a drive voltage corresponding to the drive signal of low-frequency vibration to the vibration element 14 (step S16). As a result, low-frequency vibration for the tactile sensation of the user U is generated on the panel 10. When the control unit 22 determines in step S14 that there is no pressing operation of the user U (steps S14, No), the control unit 22 repeats the process from step S10.

As described above, the control device 20 according to the first embodiment includes a drive unit 41. The vibration element 14 attached to the panel 10 having the drive unit 41 and the operation surface 15 is driven to generate vibration in the panel 10. Further, the drive unit 41 generates a sound (suppression sound) having a frequency C higher than the frequency B of the noise generated when the vibrating element 14 is vibrated at the high frequency A. As a result, it is possible to suppress noise generated when the vibrating element 14 is vibrated at a high frequency A.

(Second embodiment)
Next, the second embodiment will be described. In the following, the same reference numerals will be given to the configurations common to those of the first embodiment, and the description thereof will be omitted.

FIG. 8 is a diagram showing a configuration of an electronic device system 100 having an input system 1 according to a second embodiment. In the second embodiment, the input system 1 includes a speaker 60 that outputs voice or the like.

The speaker 60 is controlled by the drive unit 41. Further, the speaker 60 is arranged, for example, in the vicinity of the input unit 9, specifically, in the vicinity of the panel 10. The arrangement position of the speaker 60 is not limited to this.

In the input system 1 according to the second embodiment, the suppression sound generated from the panel 10 in the first embodiment is output from the speaker 60.

FIG. 9 is a flowchart showing an example of a processing procedure executed by the control unit 22, and is a process that is repeatedly executed.

As shown in FIG. 9, when the control unit 22 determines that there is a slide operation by the user U (step S10, Yes), the control unit 22 generates a drive signal for vibrating the vibrating element 14 at a high frequency (step S11), and the high frequency vibration is generated. A drive voltage corresponding to the drive signal is applied to the vibrating element 14 (step S17). As a result, high-frequency vibration for the tactile sensation of the user U is generated on the panel 10, and noise is also generated on the panel 10.

Then, the control unit 22 drives the speaker 60 based on the noise frequency B, the suppression sound information 30, and the like, and outputs the suppression sound from the speaker 60 (step S18). As described above, in the second embodiment, noise can be suppressed by the two-sound suppression effect using the suppression sound from the speaker 60.

(Third Embodiment)
Next, a third embodiment will be described. FIG. 10 is a diagram illustrating a process performed on noise in the third embodiment.

As shown in the upper part of FIG. 10, when the vibrating element 14 vibrates at a high frequency A, noise at a frequency B is generated. In the third embodiment, as shown in the lower figure of FIG. 10, a sound added to the noise (hereinafter, may be referred to as “additional sound”) is generated from the panel 10, and the noise and the added sound are generated. A harmonic sound (overtone) composed of and is generated.

Examples of harmonic sounds include, for example, sounds reminiscent of the tactile sensation of the panel 10 such as "click" to the operation of the user U, musical instruments, voices, natural sounds, and the like, but are not limited thereto. No.

More specifically, the storage unit 21 of the control device 20 according to the third embodiment stores the additional sound information 31 as shown by an imaginary line in FIG. The additional sound information 31 is information used for setting the frequencies D1 to D3 and the sound pressure of the additional sound.

Since the additional sound constitutes a harmonic sound by combining with the noise of the frequency B, the frequencies D1 to D3 of the additional sound are, for example, 1 / n of the noise frequency B (n is an integer of 2 or more). It is a value that satisfies.

Further, in the third embodiment, the method of generating the additional sound is substantially the same as the method of generating the suppressed sound in the first embodiment. That is, to explain with reference to FIG. 7, when it is determined that there is a slide operation (step S10, Yes), the control unit 22 according to the third embodiment generates a drive signal that vibrates the vibrating element 14 at a high frequency. (Step S11).

Subsequently, the control unit 22 acquires information about the additional sound from the additional sound information 31 and generates a vibration drive signal for generating the additional sound of frequencies D1 to D3 (step S12). Next, the control unit 22 superimposes a vibration drive signal (additional sound sound signal) that generates an additional sound on the drive signal that vibrates the vibrating element 14 at a high frequency A, and the drive voltage corresponding to the superimposed drive signal. Is applied to the vibrating element 14 (step S13). Therefore, high-frequency vibration for the tactile sensation of the user U and vibration for outputting the additional sound are generated on the panel 10, and a harmonic sound combined with the noise and the additional sound can be generated.

This makes it possible for the user U to recognize the noise as a harmonic sound combined with the additional sound in the third embodiment. That is, it is possible to make it difficult for the user U to recognize the noise as an abnormal sound.

Further, as in the first embodiment, when the drive unit 41 simultaneously generates the vibration for the tactile sensation and the vibration for the additional sound, the drive unit 41 defines the intensity of the vibration of the vibrating element 14 when the additional sound is generated. It may be limited to be less than or equal to the value.

In the example shown in FIG. 10, the number of additional sounds is set to 3, but the number is not limited to this, and may be 2 or less or 4 or more.

The first, second, and third embodiments described above may be combined as appropriate. That is, the suppressed sound may be generated from the panel 10 or the speaker 60 according to the noise by combining the first and second embodiments. Further, the first and third embodiments may be combined to generate one or both of the suppression sound and the additional sound from the panel 10 according to the noise. Further, the second and third embodiments may be combined to generate the additional sound from the speaker 60.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments expressed and described as described above. Therefore, various modifications can be made without departing from the spirit or scope of the general concept of the invention as defined by the appended claims and their equivalents.

1 Input system 2, 20 Control device 3 Display device 9 Input unit 10 Panel 14 Vibration element 15 Operation surface 40 Operation detection unit 41 Drive unit 60 Speaker 100 Electronic system

Claims (8)

A drive unit for driving a vibrating element attached to a panel having an operation surface to generate vibration in the panel is provided.
The drive unit
Wherein the vibrating element rather higher than the noise frequency generated when vibrating at ultrasonic band, and control apparatus characterized by generating a sound of a frequency lower than said ultrasound band of the vibrating element. The drive unit
The control device according to claim 1, wherein the vibrating element is vibrated to generate a sound having a frequency higher than the frequency of the noise from the panel. The drive unit
The control device according to claim 2 , wherein a drive signal that vibrates the vibrating element in the ultrasonic band is superposed with a drive signal that vibrates the vibrating element to generate sound from the panel. The drive unit
The control device according to claim 2 or 3 , wherein the intensity of vibration of the vibrating element when sound is generated from the panel is limited to a specified value or less. The drive unit
When the vibrating element is driven so as to switch between vibration in the ultrasonic band and vibration at a lower frequency than the ultrasonic band, the vibration intensity of the vibrating element when sound is generated from the panel. The control device according to claim 4 , wherein the restriction of the above-mentioned specified value or less is released. The drive unit
The control device according to any one of claims 1 to 5 , wherein the speaker is driven to generate a sound having a frequency higher than the frequency of the noise. A panel with an operation surface and
The vibrating element attached to the panel and
A control device including a drive unit that drives the vibrating element to generate vibration in the panel is provided.
The drive unit
Input system noise rather high than the frequency, and characterized by generating a sound of a frequency lower than said ultrasound band of the vibrating element caused when vibrating the vibrating element in the ultrasonic band. A process of driving a vibrating element attached to a panel having an operation surface by a drive unit to generate vibration in the panel.
By the drive unit, wherein the vibrating element rather higher than the frequency of the noise that occurs when the vibrating ultrasonically band, and characterized in that it comprises a step of generating a sound of a frequency lower than said ultrasound band of the vibrating element Control method.

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