Vibration generating device and vehicle including the same

Abstract

To provide a vibration generation device that can provide sound to objects that wish or should hear the sound, provides sound of good quality, and protects private life, and a vehicle including the vibration generation device.SOLUTION: A vibration generation device includes: a microphone device 100 including microphones 110 and 120 placed on an object including a plurality of areas and receiving noise around the object; an acoustic processing circuit 300 that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal; and a vibration device 200 that is disposed on the object and includes a vibration generator 210 that vibrates according to the vibration drive signal to vibrate the object. The acoustic processing circuit 300 receives sound source signals from a navigation system, an audio system, a multimedia system, and the like from a sound source providing system 400.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This specification relates to a vibration generating device and a vehicle including the same.

Background Art

[0002] Navigation, car audio systems, DMB (Digital Multimedia Broadcasting), the driver's smartphone, and various wireless devices are connected to the vehicle speakers of automobiles, and various information is provided to passengers in the form of sound through the vehicle speakers. For this purpose, the multimedia device of the vehicle sends all the sounds input from the navigation, audio, smartphone, and microphone to the vehicle multimedia device through the speakers installed inside the vehicle, and transmits the information to all the people riding in the vehicle.

[0003] Since all sound information is output to the car speakers, when the driver makes a call through the multimedia device, passengers can also hear the call content that only the driver should hear, so the driver's private life may be exposed. In addition, if the driver cannot accurately recognize the voice guidance due to the noise inside the vehicle, it may induce a traffic accident.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, the inventors of this specification recognized the problems mentioned above and conducted several experiments to provide sound to the target who desires to hear the sound or the target who must hear it. Through a plurality of experiments, the inventors of this specification invented a vibration generating device with a new structure that can provide sound to the target who desires to hear the sound or the target who must hear it, and a vehicle including the same.

[0005] The problem to be solved according to the embodiments of the present specification is to provide a vibration generating device that can provide sound to an object that desires to hear sound or an object that must hear sound, and a vehicle including the same.

[0006] The problem to be solved according to the embodiments of the specification is to provide a vibration generating device that can provide sound with good sound quality to an object that desires to hear sound or an object that must hear sound, and a vehicle including the same.

[0007] The problem to be solved according to the embodiments of the present specification is to provide a vibration generating device that can provide sound through bone conduction to an object that desires to hear sound or an object that must hear sound, and a vehicle including the same.

[0008] The problem to be solved according to the embodiments of the present specification is not limited to the matters mentioned above, and those of ordinary skill in the technical field to which the present invention pertains will clearly understand other problems intended by the embodiments of the present specification from the following description.

Means for Solving the Problem

[0009] The vibration generating device according to the embodiments of the present specification includes a microphone device that is disposed on an object including a plurality of regions and receives ambient noise of the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an inverse phase of the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device that is disposed on the object and vibrates the object by vibrating in response to the vibration drive signal.

[0010] The vibration generating device according to an embodiment of this specification is disposed on an object including a first region, a second region, a third region, and a fourth region, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and at least one vibration generator that vibrates according to the vibration drive signal and vibrates at least one of the third region and the fourth region.

[0011] The vehicle according to an embodiment of this specification includes a seat having a headrest including a plurality of regions, and a vibration generating device disposed on the headrest. The vibration generating device is disposed on an object including a plurality of regions, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device that is disposed on the object and vibrates the object by vibrating according to the vibration drive signal. The headrest is the object of the vibration generating device.

[0012] The vehicle according to an embodiment of this specification includes a seat having a headrest including the first to fourth regions, and a vibration generating device disposed on the headrest. The vibration generating device is disposed on an object including the first region, the second region, the third region, and the fourth region, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device that includes at least one vibration generator that vibrates according to the vibration drive signal and vibrates at least one of the third region and the fourth region. The headrest is the object of the vibration generating device.

[0013] Specific matters according to various examples of this specification other than the solutions to the problems mentioned above are included in the following description and drawings.

Effect of the Invention

[0014] The vibration generator according to the embodiments of this specification and the vehicle including the same can desire to listen to sound or provide sound to the target to be listened to, and can provide sound with good sound quality.

[0015] The vibration generator according to the embodiments of this specification and the vehicle including the same can desire to listen to sound among the passengers (driver and passengers) in the vehicle or provide sound to the target to be listened to, and can protect private life.

[0016] Since the vibration generator according to the embodiments of this specification and the vehicle including the same can cancel out the noise generated centered on the user, the noise reduction effect on the corresponding user can be improved, and sound with good sound quality can be provided.

[0017] Since the vibration generator according to the embodiments of this specification and the vehicle including the same can provide guidance broadcasts and warning sounds through bone conduction, the driver can accurately recognize the guidance broadcasts and warning sounds even under vehicle interior noise.

[0018] Since the vibration generator according to the embodiments of this specification and the vehicle including the same can provide sound through bone conduction, it can assist the safe driving of the hearing-impaired.

[0019] The effects of this specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

[0020] The problems to be solved, the means for solving the problems, and the contents of the effects mentioned above do not specify the essential features of the claims, and the scope of rights of the claims is not limited by the matters described in the content of the invention.

[0021] The figures attached below are for helping with the understanding of the embodiments of this specification, and provide embodiments together with the detailed description. However, the technical features of this embodiment are not limited to specific figures, and the features disclosed in each figure can be combined with each other to form a new embodiment.

Brief Description of the Drawings

[0022]

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Mode for Carrying Out the Invention

[0023] The advantages and features of the present specification, and the methods for achieving them, will become clear by referring to an embodiment described in detail below together with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, and can be realized in various different shapes. The present embodiment is merely provided to complete the disclosure of the present specification and to fully inform those with ordinary knowledge in the technical field to which the present specification belongs of the scope of the invention. The present specification is defined only by the scope of the claims.

[0024] To describe the embodiments of this specification, the shapes, sizes, ratios, angles, numbers, etc. shown in the figures are exemplary and this specification is not limited to the matters shown in the figures. The same reference numerals throughout the specification refer to the same components. Also, in the description of this specification, when it is determined that a specific description of related known technologies would unnecessarily obscure the gist of the present invention, the detailed description thereof is omitted. When terms such as "including", "having", "consisting of", etc. are used in this specification, other parts can be added unless "only" is used. When a component is expressed in the singular, it includes the case of including a plurality unless there is a particularly explicit description.

[0025] When interpreting components, even without a separate explicit description, it is interpreted to include the range of errors.

[0026] When it is an explanation about the positional relationship, for example, when the positional relationship between two parts is described by "above", "on the upper part", "on the lower part", "sideways", etc., unless "immediately" or "directly" is used, one or more other parts can also be located between the two parts.

[0027] When it is an explanation about the relationship of time, for example, when the temporal front-back relationship is described by "after", "subsequent to", "next", "before", etc., unless "immediately" or "directly" is used, it can also include the case of not being continuous.

[0028] First, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical idea of the present invention.

[0029] In describing the components of this specification, terms such as first, second, A, B, (a), (b), etc. can be used. Such terms are for distinguishing the components from other components, and the essence, order, sequence, or number of the components is not limited by such terms. When a component is described as "connected", "coupled", or "linked" to another component, that component can be directly connected to the other component or can be connected, but it should be understood that there may be other components "intervening" between them that can be indirectly connected or connected without specific explicit description.

[0030] The term "at least one" should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of "at least one of the first item, the second item, and the third item" can be considered to include not only each of the first item, the second item, or the third item alone, but also all combinations of two or more items that can be presented from among the first item, the second item, and the third item.

[0031] The features of each of some embodiments of this specification can be partially or wholly combined or combined with each other, enabling various technical linkages and drives, and each example can be implemented independently of each other or can also be implemented together in a related relationship.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms that are defined the same as in a commonly used dictionary shall, for example, be interpreted as having a meaning that conforms to their meaning in the context of the relevant description, and it should be additionally understood that they should not be interpreted in an idealized or overly formal sense. As explicitly defined herein. For example, the terms "component" or "unit" can be applied to, for example, separate circuits or structures, integrated circuits, computational blocks of circuit devices, or any structure configured to perform a function only when understood as one technology in this technical field.

[0033] Hereinafter, by referring to the accompanying drawings and examples, the examples of this specification will be described in detail as follows. The scale of the components shown in the drawings may have a scale different from the actual one for the convenience of explanation, and thus is not limited to the scale shown in the drawings.

[0034] Hereinafter, with reference to the attached drawings, a vibration generating device according to an example of this specification and a vehicle including the same will be described.

[0035] FIG. 1 is a diagram showing a vibration generating device according to an example of this specification.

[0036] Referring to FIG. 1, a vibration generating device according to an example of this specification can include a microphone device 100, a vibration device 200, and an acoustic processing circuit 300. The configuration of the vibration generating device is not limited thereto.

[0037] For example, the vibration generating device according to the embodiments of the present specification can be applied to the seats of vehicles. As other embodiments of the present specification, it can be applied to seats of trains, massage chairs, office chairs, and head protection devices (such as military helmets, motorcycle helmets, and baseball helmets, etc.). The objects to which the vibration generating device can be applied are not limited to this. For example, the object may be a vibration target object, a vibration member, a vibration plate, or an acoustic generating plate, etc.

[0038] The microphone device 100 according to the embodiments of the present specification can receive noise (or the second sound source), which is an acoustic other than the sound source (or the first sound source), which is the acoustic to be provided via the vibration device 200. The noise input to the microphone device 100 can be converted into an electrical signal and provided to the acoustic processing circuit 300. For example, the microphone device 100 can convert the input noise into an electrical signal corresponding to the noise and provide it to the acoustic processing circuit 300.

[0039] According to the embodiments of the present specification, the microphone device 100 can be arranged on the object so as to receive the noise around the user. For example, the microphone device 100 can be arranged around the vibration device 200 and arranged on the object so as to receive the noise around the vibration device 200.

[0040] According to the embodiments of the present specification, the microphone device 100 can be arranged so as to receive at least one or more of the noise on the left side and the noise on the right side around the user. For example, the microphone device 100 can be arranged so as to receive at least one or more of the noise around the left ear and the noise around the right side of the user. For example, the microphone device 100 can be arranged on one or more of the left side and the right side around the vibration device 200. For example, the microphone device 100 can receive at least one or more of the noise on the left side and the noise on the right side around the vibration device 200.

[0041] According to the embodiments of this specification, when the microphone device 100 receives noise around the user's ear, the acoustic processing circuit 300 can more effectively eliminate the noise around the user's ear than when receiving noise farther away from the user's ear. Therefore, the noise reduction effect can be improved, and an acoustic with good sound quality can be provided to the user.

[0042] According to the embodiments of this specification, the microphone device 100 can be disposed in a first area of an object to which the vibration generating device is applied to receive noise around the first area. For example, the first area can be an area around the user's left ear. For example, the microphone device 100 can receive noise around the user's left ear. For example, the first area can be around the left side of the vibration device 200. For example, the microphone device 100 can receive noise around the left side of the vibration device 200.

[0043] According to the embodiments of this specification, the microphone device 100 can be disposed in a second area of an object to which the vibration generating device is applied to receive noise around the second area. For example, the second area can be an area around the user's right ear. For example, the microphone device 100 can receive noise around the user's right ear. For example, the second area can be around the right side of the vibration device 200. For example, the microphone device 100 can receive noise around the right side of the vibration device 200.

[0044] According to the embodiments of this specification, the microphone device 100 can be disposed in the first area and the second area of an object to which the vibration generating device is applied to receive noise around the first and second areas. Thereby, the microphone device 100 can receive noise around both ears of the user or noise around the left and right sides of the vibration device 200.

[0045] According to the embodiments of this specification, the microphone device 100 can include at least one or more microphones for receiving noise.

[0046] According to the embodiments of this specification, the microphone device 100 can include a first microphone (or left microphone) 110 disposed in the first region of the object. For example, the microphone device 100 can include one or more first microphones 110. For example, the first microphone 110 can receive noise (or first noise or left noise) around the left ear of the user (or around the left side of the vibration device 200). For example, the first microphone 110 can convert the first noise into an electrical signal and provide the first noise signal to the acoustic processing circuit 300.

[0047] According to the embodiments of this specification, the microphone device 100 can include a second microphone (or right microphone) 120 disposed in the second region of the object. For example, the microphone device 100 can include one or more second microphones 120. For example, the second microphone 120 can receive noise (or second noise or left noise) around the right ear of the user (or around the right side of the vibration device 200). For example, the second microphone 120 can convert the second noise into an electrical signal and provide the second noise signal to the acoustic processing circuit 300.

[0048] According to the embodiments of this specification, the microphone device 100 can include a first microphone (or left microphone) 110 disposed in the first region of the object and a second microphone (or right microphone) 120 disposed in the second region of the object. For example, the microphone device 100 can include one or more first microphones 110 and one or more second microphones 120. For example, the microphone device 100 can receive the noise around the left ear of the user (or around the left side of the vibration device 200) through the first microphone 110 and receive the noise around the right ear of the user (or around the right side of the vibration device 200) through the second microphone 120.

[0049] The vibration device 200 according to the embodiments of this specification is vibrated by a vibration driving signal (or an acoustic signal) provided by the acoustic processing circuit 300. The vibration of the vibration device 200 can vibrate the ear of the user in contact with the vibration device 200 to provide a sound source to the user. The vibration driving signal corresponds to the sound source to be provided to the user. The vibration of the vibration device 200 by the vibration driving signal is transmitted to the brain through the ear epidermis, the bones around the ear (and the skull bones), the cochlea, and the auditory nerve, and the user can hear the sound source transmitted through bone conduction.

[0050] According to the embodiments of this specification, the vibration device 200 can be directly in contact with the ear of the user to vibrate the ear of the user. For example, at least a part of the vibration device 200 is exposed outside the object and can be directly in contact with the ear of the user. For example, the vibration device 200 can be indirectly in contact with the ear of the user to vibrate the ear of the user. For example, the vibration device 200 vibrates the contacted object, and the vibration of the object can vibrate the ear of the contacted user. For example, the area vibrated by the vibration device 200 is not limited to the ear, and the vibration of the vibration device 200 can include the area around the ear where the sound source can be transmitted to the user through bone conduction.

[0051] Therefore, since the vibration generating device according to the embodiments of this specification directly transmits the sound source to the cochlea of the user through bone conduction, only the corresponding user can hear the sound source. Since the vibration generating device according to the embodiments of this specification does not allow other people to eavesdrop on the sound source, the private life of the user can be protected. Since the vibration generating device according to the embodiments of this specification can directly transmit the sound source to the user through bone conduction, it can be usefully used by hearing-impaired people and can assist the safe driving of hearing-impaired people. Since the vibration generating device according to the embodiments of this specification can provide guidance broadcasts and warning sounds through bone conduction, the driver can accurately recognize the guidance broadcasts and warning sounds even under the in-vehicle noise.

[0052] Figure 2 is a diagram showing the vibration device according to the embodiments of this specification. Figure 3 is a cross-sectional view taken along line I-I' shown in Figure 2.

[0053] Referring to FIGS. 1 to 3, the vibration device 200 according to the embodiments of the present specification may include at least one or more vibration generators 210. For example, the vibration generator 210 may be disposed in the third region of the object and vibrate by a vibration driving signal. For example, the third region of the object may be a region of the object corresponding to the left ear of the user. For example, the vibration generator 210 may vibrate by a vibration driving signal and vibrate the left ear of the user. For example, the vibration generator 210 may vibrate the left ear of the user and the peripheral region of the left ear.

[0054] According to the embodiments of the present specification, the vibration generator 210 may be disposed in the fourth region of the object and vibrate by a vibration driving signal. For example, the fourth region of the object may be a region of the object corresponding to the right ear of the user. For example, the vibration generator 210 may vibrate by a vibration driving signal and vibrate the right ear of the user. For example, the vibration generator 210 may vibrate the right ear of the user and the peripheral region of the right ear.

[0055] According to the embodiments of the present specification, the vibration generator 210 may be disposed across the third and fourth regions of the object and vibrate by a vibration driving signal. For example, the vibration generator 210 may vibrate by a vibration driving signal and vibrate both ears of the user. For example, the vibration generator 210 may vibrate both ears of the user and the peripheral regions of both ears.

[0056] According to the embodiments of the present specification, the first region of the object where the first microphone 110 is disposed and the third region of the object where the vibration generator 210 is disposed may overlap each other. For example, the second region of the object where the second microphone 120 is disposed and the fourth region of the object where the vibration generator 210 is disposed may overlap each other.

[0057] For example, the oscillator 210 according to the embodiments of this specification can include one or more vibrating structures. For example, the oscillator 210 can include a plurality of vibrating structures 210A. For example, the vibrating structure 210A can be disposed in the third region of the object and can vibrate by a vibration driving signal. For example, the vibrating structure 210A can be disposed in the fourth region of the object and can vibrate by a vibration driving signal. For example, the vibrating structure 210A can be disposed across the third region and the fourth region and can vibrate by a vibration driving signal.

[0058] The vibrating structure 210A can vibrate by alternately repeating contraction and expansion due to the piezoelectric effect (or piezoelectric property). The oscillator 210 according to the embodiments of this specification can directly vibrate the object by vibrating in the thickness direction (Z) by alternately repeating contraction and expansion due to the inverse piezoelectric effect. The vibrating structure 210A according to the embodiments of this specification can have a rectangular shape or a square shape.

[0059] The vibrating structure 210A according to the embodiments of this specification can include a vibrating portion 211, a first electrode layer (E1), and a second electrode layer (E2).

[0060] The vibrating portion 211 can include a piezoelectric material including the piezoelectric effect, a composite piezoelectric material, or an electroactive material. The vibrating portion 211 can be expressed by terms such as a vibrating layer, a piezoelectric material layer, a piezoelectric composite layer, an electroactive layer, a piezoelectric material portion, a piezoelectric composite portion, an electroactive portion, a piezoelectric structure, a piezoelectric composite, or a piezoelectric ceramic composite, but is not limited thereto.

[0061] The vibrating portion 211 according to the embodiments of this specification can be composed of a ceramic-based material capable of realizing relatively high vibration. For example, the vibrating portion 211 can have a 1-3 composite structure or a 2-2 composite structure. For example, the piezoelectric strain coefficient (d 33 ) of the vibrating portion 211 along the thickness direction (Z) can be 1,000 pC / N or more, but is not limited thereto.

[0062] The first electrode layer (E1) is disposed on the first surface (or upper surface) of the vibrating portion 211 and can be electrically connected to the first surface of the vibrating portion 211. For example, the first electrode layer (E1) can have a shape of a single electrode (or common electrode) disposed on the entire first surface of the vibrating portion 211. The first electrode layer (E1) according to the embodiments of the present specification can be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material. For example, the transparent or translucent conductive material can include, but is not limited to, ITO (indium tin oxide) or IZO (indium zinc oxide). The opaque conductive material can include, or can be made of an alloy of, aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), or magnesium (Mg), etc., but is not limited thereto.

[0063] The second electrode layer (E2) is disposed on the second surface (or back surface) opposite to the first surface of the vibrating portion 211 and can be electrically connected to the second surface of the vibrating portion 211. For example, the second electrode layer (E2) can have a shape of a single electrode (or common electrode) disposed on the entire second surface of the vibrating portion 211. The second electrode layer (E2) according to the embodiments of the present specification can be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material. For example, the second electrode layer (E2) can be made of the same material as the first electrode layer (E1), but is not limited thereto. As another embodiment of the present specification, the second electrode layer (E2) can be composed of a material different from the first electrode layer (E1).

[0064] The vibrating portion 211 can be polarized (or subjected to a polling treatment) by a constant voltage applied to the first electrode layer (E1) and the second electrode layer (E2) in a constant temperature atmosphere or a temperature atmosphere that changes from a high temperature to a normal temperature, but is not limited thereto.

[0065] The vibration generator 210 according to the embodiments of the present specification can further include a first protection member 213 and a second protection member 215.

[0066] The first protective member 213 can be disposed on the first surface of the vibration generator 210. For example, the first protective member 213 can cover the first electrode layer (E1) disposed on the first surface of the vibration structure 210A. Thereby, the first protective member 213 can commonly support the first surface of the vibration structure 210A and can protect the first surface or the first electrode layer (E1) of the vibration structure 210A.

[0067] The first protective member 213 according to the embodiment of the present specification can be disposed on the first surface of the vibration structure 210A via the first adhesive layer 212. For example, the first protective member 213 can be directly disposed on the first surface of the vibration structure 210A by a film lamination process mediated by the first adhesive layer 212.

[0068] The second protective member 215 can be disposed on the second surface of the vibration generator 210. For example, the second protective member 215 can cover the second electrode layer (E2) disposed on the second surface of the vibration structure 210A. Thereby, the second protective member 215 can commonly support the second surface of the vibration structure 210A and can protect the second surface or the second electrode layer (E2) of the vibration structure 210A.

[0069] The second protective member 215 according to the embodiment of the present specification can be disposed on the second surface of the vibration structure 210A via the second adhesive layer 214. For example, the second protective member 215 can be directly disposed on the second surface of the vibration structure 210A by a film lamination process mediated by the second adhesive layer 214.

[0070] Each of the first protective member 213 and the second protective member 215 according to the embodiment of the present specification can include a plastic film. For example, each of the first protective member 213 and the second protective member 215 can be a polyimide film or a polyethylene terephthalate film, but is not limited thereto.

[0071] The first adhesive layer 212 can be disposed on the first surface of the vibrating structure 210A. For example, the first adhesive layer 212 can be formed on the back surface (or inner surface) of the first protective member 213 facing the first surface of the vibrating structure 210A and disposed on the first surface of the vibrating structure 210A.

[0072] The second adhesive layer 214 can be disposed on the second surface of the vibrating structure 210A. For example, the second adhesive layer 214 can be formed on the front surface (or inner surface) of the second protective member 215 facing the second surface of the vibrating structure 210A and disposed on the second surface of the vibrating structure 210A.

[0073] The vibrating structure 210A can be surrounded by the first adhesive layer 212 and the second adhesive layer 214. For example, the first adhesive layer 212 and the second adhesive layer 214 can completely surround the entire vibrating structure 210A. For example, the first adhesive layer 212 and the second adhesive layer 214 can be represented by a cover member or the like, but are not limited thereto. When the first adhesive layer 212 and the second adhesive layer 214 are cover members, the first protective member 213 can be disposed on the first surface of the cover member, and the second protective member 215 can be disposed on the second surface of the cover member. For example, for the sake of convenience of explanation, the first adhesive layer 212 and the second adhesive layer 214 are shown as the first adhesive layer 212 and the second adhesive layer 214, but are not limited thereto, and can be disposed as one adhesive layer.

[0074] Each of the first adhesive layer 212 and the second adhesive layer 214 according to the embodiments of the present specification can include an electrically insulating material that can be compressed and restored while having adhesiveness. For example, each of the first adhesive layer 212 and the second adhesive layer 214 can include, but is not limited to, an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin.

[0075] The vibration device 200 or the vibration generator 210 according to the embodiments of the present specification can further include a first power supply line (PL1), a second power supply line (PL2), and a pad portion 201.

[0076] The first power supply line (PL1) can be arranged on the first protection member 213. For example, the first power supply line (PL1) can be arranged on the back surface of the first protection member 213 facing the first surface of the vibrating structure 210A. The first power supply line (PL1) can be electrically connected to the first electrode layer (E1) of each of the plurality of vibrating structures 210A. For example, the first power supply line (PL1) can be directly electrically connected to the first electrode layer (E1) of the vibrating structure 210A. For example, the first power supply line (PL1) can be electrically connected to the first electrode layer (E1) of the vibrating structure 210A through an anisotropic conductive film. As another example in this specification, the first power supply line (PL1) can be electrically connected to the first electrode layer (E1) of the vibrating structure 210A through a conductive substance (or particles) contained in the first adhesive layer 212.

[0077] The second power supply line (PL2) can be arranged on the second protection member 215. For example, the second power supply line (PL2) can be arranged on the front surface of the second protection member 215 facing the second surface of the vibrating structure 210A. The second power supply line (PL2) can be electrically connected to the second electrode layer (E2) of the vibrating structure 210A. For example, the second power supply line (PL2) can be directly electrically connected to the second electrode layer (E2) of the vibrating structure 210A. For example, the second power supply line (PL2) can be electrically connected to the second electrode layer (E2) of the vibrating structure 210A through an anisotropic conductive film. As another example in this specification, the second power supply line (PL2) can be electrically connected to the second electrode layer (E2) of the vibrating structure 210A through a conductive substance (or particles) contained in the second adhesive layer 214.

[0078] The pad portion 201 can electrically connect the first power supply line (PL1) and the second power supply line (PL2). For example, the pad portion 201 can be disposed on the vibration generator 210 so as to be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2). The pad portion 201 according to the embodiment of the present specification can include a first pad electrode and a second pad electrode. The first pad electrode can be electrically connected to one side of the first power supply line (PL1). The second pad electrode can be electrically connected to one side of the second power supply line (PL2).

[0079] The vibration device 200 or the vibration generator 210 according to the embodiment of the present specification can further include a flexible cable 220.

[0080] The flexible cable 220 is electrically connected to the pad portion 201 disposed on the vibration device 200 or the vibration generator 210, and can supply a vibration drive signal (or an acoustic signal) provided from an acoustic processing circuit to the vibration device 200 or the vibration generator 210. The flexible cable 220 according to the embodiment of the present specification can include a first terminal and a second terminal. The first terminal of the flexible cable 220 can be electrically connected to the first pad electrode of the pad portion 201. The second terminal of the flexible cable 220 can be electrically connected to the second pad electrode of the pad portion 201. For example, the flexible cable 220 can be a flexible printed circuit cable or a flexible flat cable, but is not limited thereto.

[0081] The vibration generator 210 according to the embodiment of the present specification can further include a plate 216.

[0082] The plate 216 can be disposed on the first protective member 213 or the second protective member 215. For example, the plate 216 can have the same shape as the first protective member 213 (or the second protective member 215). For example, the plate 216 can be the same as or larger than the first protective member 213 (or the second protective member 215).

[0083] The plate 216 according to the embodiment of the present specification can be disposed on the front surface (or the first surface) of the first protection member 213. The plate 216 can be disposed on the front surface of the first protection member 213 of the vibration generator 210 via a connecting member. The plate 216 according to the embodiment of the present specification can be disposed between the object and the first protection member 213.

[0084] According to another embodiment of the present specification, the plate 216 can be disposed on the back surface (or the second surface) of the second protection member 215. The plate 216 can be disposed on the back surface of the second protection member 215 of the vibration generator 210 via a connecting member. According to another embodiment of the present specification, the plate 216 can be disposed between the object and the second protection member 215.

[0085] The plate 216 according to the embodiment of the present specification can be made of one or more materials selected from metal materials such as stainless steel, aluminum (Al), magnesium (Mg), magnesium (Mg) alloy, magnesium-lithium (Mg-Li) alloy, and aluminum (Al) alloy, but is not limited thereto. The plate 216 is disposed on the first protection member 213 (or the second protection member 215) to reinforce the mass of the vibration generator 210, and by reducing the resonance frequency of the vibration generator 210 as the mass increases, the acoustic characteristics in the low-frequency band and the sound pressure characteristics in the low-frequency band generated in conjunction with the vibration of the vibration generator 210 can be increased, and the flatness of the sound pressure characteristics can be improved. Here, the flatness of the acoustic characteristics can be the magnitude of the deviation between the maximum sound pressure and the minimum sound pressure.

[0086] In addition, the vibration device 200 according to the embodiments of the present specification further includes a plate 216 disposed on the vibration generator 210, so that the resonance frequency of the vibration generator 210 can be decreased by the plate 216. Thereby, the vibration device 200 according to the embodiments of the present specification can increase the acoustic characteristics in the low frequency band and the sound pressure characteristics in the low frequency band generated by the vibration of the object interlocked with the vibration of the vibration generator 210, and can improve the flatness of the sound pressure characteristics.

[0087] FIGS. 4A to 4F are diagrams showing the vibration structure shown in FIG. 3. Referring to FIGS. 2, 3, and 4A, the vibration structure 210A included in the vibration generator 210 of the vibration device 200 according to the embodiments of the present specification may include a vibrating portion 211 (or a vibrating layer). For example, the vibration device 200 according to the embodiments of the present specification may include the vibration structure 210A. For example, the vibration structure 210A may include a first portion 211a and a second portion 211b. For example, the first portion 211a may include an inorganic substance, and the second portion 211b may include an organic substance. For example, the first portion 211a may have piezoelectric characteristics, and the second portion 211b may have soft characteristics or flexibility.

[0088] The vibrating part 211 can include a plurality of first parts 211a and a plurality of second parts 211b. For example, the plurality of first parts 211a and the plurality of second parts 211b can be alternately and repeatedly arranged along the second direction (Y). Each of the plurality of first parts 211a can be arranged between the plurality of second parts 211b. Each of the plurality of first parts 211a can have a length parallel to the first direction (X) while having a first width (W1) parallel to the second direction (Y). Each of the plurality of second parts 211b can be arranged side by side with the first direction (X). For example, each of the plurality of second parts 211b can have a length parallel to the first direction (X) while having a second width (W2). Each of the plurality of second parts 211b can all have the same size, for example, width, area, or volume. For example, each of the plurality of second parts 211b can all have the same size, for example, width, area, or volume within the range of process errors (or tolerances) generated in the manufacturing process. The first width (W1) can be the same as or different from the second width (W2). For example, the first width (W1) can be larger than the second width (W2). For example, the first part 211a and the second part 211b can include a line shape or a stripe shape having the same or different sizes from each other. Therefore, the vibrating part 211 shown in FIG. 4A can have a resonance frequency of 20 kHz or less by having a 2-2 composite structure. However, it is not limited thereto, and the resonance frequency of the vibrating part 211 can be changed by at least one of the shape, length, and thickness of the vibrating part 211.

[0089] Referring to FIGS. 2, 3, and 4B, the vibrating portion 211 of the vibrating structure 210A included in the vibrator 210 of the vibration device 200 according to other embodiments of the present specification may include a plurality of first portions 211a and a plurality of second portions 211b that are alternately and repeatedly arranged along the first direction (X). Each of the plurality of first portions 211a may be disposed between the plurality of second portions 211b. For example, each of the plurality of first portions 211a may have a length parallel to the second direction (Y) while having a third width (W3) parallel to the first direction (X). Each of the plurality of second portions 211b may have a length parallel to the second direction (Y) while having a fourth width (W4) parallel to the first direction (X). The third width (W3) may be the same as or different from the fourth width (W4). For example, the third width (W3) may be larger than the fourth width (W4). For example, the first portion 211a and the second portion 211b may include a line shape or a stripe shape having the same or different sizes from each other. Such a vibrating portion 211 shown in FIG. 4B can have a resonance frequency of 20 kHz or less by having a 2-2 composite structure. However, the present invention is not limited thereto, and the resonance frequency of the vibrating portion 211 can be changed by at least one of the shape, length, and thickness of the vibrating portion 211.

[0090] In the vibrating portion 211 shown in FIGS. 4A and 4B, each of the plurality of first portions 211a and the plurality of second portions 211b may be arranged (or arrayed) side by side in the same plane (or the same layer). Each of the plurality of second portions 211b may be configured to fill a gap between two adjacent first portions 211a. Each of the plurality of second portions 211b may be connected or adhered to an adjacent first portion 211a. Thereby, the vibrating portion 211 can be extended to a desired size or length by side bonding (or connection) of the first portion 211a and the second portion 211b.

[0091] In the vibrating part 211 shown in FIGS. 4A and 4B, the widths (W2, W4) of the respective plurality of second parts 211b can gradually decrease from the middle part of the vibrating part 211 or the vibration device 200 toward both edge parts (or both sides, or both tips).

[0092] According to the embodiments of the present specification, the second part 211b having the largest width (W2, W4) among the plurality of second parts 211b can be located at the part where the largest stress concentrates when the vibrating part 211 or the vibration device 200 vibrates in the vertical direction (Z) (or the thickness direction). The second part 211b having the smallest width (W2, W4) among the plurality of second parts 211b can be located at the part where relatively the smallest stress is generated when the vibrating part 211 or the vibration device 200 vibrates in the vertical direction (Z). For example, the second part 211b having the largest width (W2, W4) among the plurality of second parts 211b can be arranged at the middle part of the vibrating part 211, and the second part 211b having the smallest width (W2, W4) among the plurality of second parts 211b can be arranged at both edge parts of the vibrating part 211. Thereby, when the vibrating part 211 or the vibration device 200 vibrates in the vertical direction (Z), the interference of sound waves or the superposition of resonance frequencies generated at the part where the largest stress concentrates can be minimized, whereby the dipping phenomenon of the sound pressure generated in the low frequency band can be improved, and the flatness of the acoustic characteristics in the low frequency band can be improved. For example, the flatness of the acoustic characteristics can be the magnitude of the deviation between the maximum sound pressure and the minimum sound pressure.

[0093] In the vibrating part 211 shown in FIGS. 4A and 4B, each of the plurality of first parts 211a can have a different size (or width) from each other. For example, the size (or width) of each of the plurality of first parts 211a can gradually decrease or increase from the middle part of the vibrating part 211 or the vibration device 200 toward both edge parts (or both sides, or both tips). In this case, the acoustic sound pressure characteristics can be improved by various natural vibration frequencies due to the vibrations of the respective plurality of first parts 211a having different sizes from each other in the vibrating part 211, and the reproduction band of the sound can be expanded.

[0094] Referring to FIGS. 2, 3, and 4C, the vibrating portion 211 of the vibrating structure 210A included in the vibrator 210 of the vibration device 200 according to another embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along the first direction (X) and the second direction (Y), and a second portion 211b disposed between the plurality of first portions 211a. Each of the plurality of first portions 211a may be arranged to be spaced apart from each other along each of the first direction (X) and the second direction (Y). For example, each of the plurality of first portions 211a may be arranged in a lattice shape while having a hexahedral shape with the same size as each other. The second portion 211b may be disposed between the plurality of first portions 211a along each of the first direction (X) and the second direction (Y). The second portion 211b may be configured to fill a gap between two adjacent first portions 211a or surround each of the plurality of first portions 211a. Thereby, the second portion 211b may be connected or adhered to the adjacent first portion 211a. For example, the width of the second portion 211b disposed between two adjacent first portions 211a along the first direction (X) may be the same as or different from the width of the first portion 211a, and the width of the second portion 211b disposed between two adjacent first portions 211a along the second direction (Y) may be the same as or different from the width of the first portion 211a. Therefore, the vibrating portion 211 shown in FIG. 4C may have a 1-3 composite structure and thus may have a resonance frequency of 30 MHz or less. However, it is not limited thereto, and the resonance frequency of the vibrating portion 211 may be changed by at least one of the shape, length, and thickness of the vibrating portion 211.

[0095] Referring to FIGS. 2, 3, and 4D, the vibrating portion 211 of the vibrating structure 210A included in the vibrator 210 of the vibration device 200 according to another embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along the first direction (X) and the second direction (Y), and a second portion 211b surrounding each of the plurality of first portions 211a. Each of the plurality of first portions 211a may have a planar structure in a circular shape. For example, each of the plurality of first portions 211a may have a circular shape, but is not limited thereto, and may have a dot shape including an elliptical shape, a polygonal shape, or a donut shape. The second portion 211b may be configured to surround each of the plurality of first portions 211a. Thereby, the second portion 211b may be connected or adhered to the side surfaces of each of the plurality of first portions 211a. Each of the plurality of first portions 211a and the second portion 211b may be arranged (or arrayed) side by side in the same plane (or the same layer). Therefore, the vibrating portion 211 shown in FIG. 4D may be realized as a circular vibration source (or vibrating body) while having a 1-3 composite structure, whereby the vibration characteristics or the output characteristics of the sound may be improved, and it may have a resonance frequency of 30 MHz or less. However, it is not limited thereto, and the resonance frequency of the vibrating portion 211 may be changed by at least one of the shape, length, and thickness of the vibrating portion 211.

[0096] Referring to FIGS. 2, 3, and 4E, the vibrating portion 211 of the vibrating structure 210A included in the vibrator 210 of the vibration device 200 according to another embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along the first direction (X) and the second direction (Y), and a second portion 211b surrounding each of the plurality of first portions 211a. Each of the plurality of first portions 211a may have a planar structure in a triangular shape. For example, each of the plurality of first portions 211a may have the shape of a triangular plate.

[0097] According to the embodiments of this specification, among a plurality of first portions 211a, four adjacent first portions 211a can be arranged adjacent to each other so as to form a square shape (or a square). Each vertex of the four adjacent first portions 211a forming a square shape can be arranged adjacent to the central portion (or the exact center portion) of the square shape. The second portion 211b can be configured to surround each of the plurality of first portions 211a. Thereby, the second portion 211b can be connected or adhered to the side surfaces of each of the plurality of first portions 211a. Each of the plurality of first portions 211a and the second portion 211b can be arranged (or arrayed) side by side in the same plane (or the same layer). Therefore, the vibrating portion 211 shown in FIG. 4E can have a resonance frequency of 30 MHz or less by a 1-3 composite structure. However, it is not limited thereto, and the resonance frequency of the vibrating portion 211 can be changed by at least one of the shape, length, and thickness of the vibrating portion 211, etc.

[0098] According to other embodiments of this specification, as shown in FIG. 4F, among a plurality of first portions 211a, six adjacent first portions 211a can be arranged adjacent to each other so as to form a hexagonal shape (or a regular hexagonal shape). Each vertex of the six adjacent first portions 211a forming a hexagonal shape can be arranged adjacent to the central portion (or the exact center portion) of the hexagonal shape. The second portion 211b can be configured to surround each of the plurality of first portions 211a. Thereby, the second portion 211b can be connected or adhered to the side surfaces of each of the plurality of first portions 211a. Each of the plurality of first portions 211a and the second portion 211b can be arranged (or arrayed) side by side in the same plane (or the same layer). Therefore, the vibrating portion 211 shown in FIG. 4F can be realized as a vibration source (or a vibrating body) close to a circular shape while having a 1-3 composite structure, whereby the vibration characteristics or the output characteristics of sound can be improved, and it can have a resonance frequency of 30 MHz or less. However, it is not limited thereto, and the resonance frequency of the vibrating portion 211 can be changed by at least one of the shape, length, and thickness of the vibrating portion 211, etc.

[0099] Referring to FIGS. 4E and 4F, among the plurality of first portions 211a having a triangular shape, 2N adjacent first portions 211a (where N is a natural number of 2 or more) can be arranged adjacent to each other so as to form a 2N-sided shape.

[0100] In FIGS. 4A to 4F, each of the plurality of first portions 211a according to the embodiment of the present specification can be composed of an inorganic material portion. The inorganic material portion can include a piezoelectric material or an electroactive material. The piezoelectric material or the electroactive material has a property that a potential difference is generated by dielectric polarization accompanying a change in the relative positions of positive (+) ions and negative (-) ions while a pressure or a torsional phenomenon acts on the crystal structure by an external force, and conversely, vibration is generated by an electric field due to an applied voltage. As described with reference to FIG. 3, the first surface of each of the plurality of first portions 211a can be electrically connected to the first electrode layer (E1), and the second surface of each of the plurality of first portions 211a can be electrically connected to the second electrode layer (E2).

[0101] In FIGS. 4A to 4F, the inorganic material portion formed in each of the plurality of first portions 211a can be composed of a material of a ceramic series capable of realizing relatively high vibration, or can be composed of a piezoelectric ceramic having a perovskite crystal structure. The perovskite crystal structure has piezoelectric and inverse piezoelectric effects and can be a plate-like structure having orientation. The perovskite crystal structure is represented by the chemical formula ABO3, where the A site can be composed of a divalent metal element and the B site can be composed of a tetravalent metal element. For example, in the chemical formula ABO3, the A site and the B site can be cations, and O can be an anion. For example, the first portion 211a can include at least one of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTiO3, but is not limited thereto.

[0102] The perovskite crystal structure can generate a piezoelectric effect due to external stress or magnetic field, causing the position of the central ion, for example, titanium (Ti) ion in the case of PbTiO3, to fluctuate and the polarization to change. For example, the perovskite crystal structure can change from a cubic shape, which is a symmetric structure, to shapes such as tetragonal, orthorhombic, and rhombohedral, which are unsymmetric structures, due to external stress or magnetic field, thereby generating a piezoelectric effect. At the morphotropic phase boundaries of tetragonal and rhombohedral with unsymmetric structures, the polarization is high and the rearrangement of polarization is easy, so it can have high piezoelectric properties.

[0103] According to an embodiment of the present specification, the inorganic material part formed in each of the plurality of first parts 211a can include, but is not limited to, one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb).

[0104] According to another embodiment of the present specification, the inorganic material part formed in each of the plurality of first parts 211a can include, but is not limited to, a PZT (lead zirconate titanate) - based material containing lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (lead zirconate nickel niobate) - based material containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb). Alternatively, the inorganic material part can include, but is not limited to, at least one or more of CaTiO3, BaTiO3, and SrTiO3 that do not contain lead (Pb).

[0105] According to other embodiments of the present specification, the inorganic material part formed in each of the plurality of first parts 211a may have a piezoelectric strain coefficient (d 33 ) of 1,000 pC / N or more along the thickness direction (Z). In order to apply the vibration device to a large object and have sufficient vibration characteristics or piezoelectric characteristics, it is necessary to have a high piezoelectric strain coefficient (d 33 ). For example, in order to have a high piezoelectric strain coefficient (d 33 ), the inorganic material part may contain a PZT-based material (PbZrTiO3) as a main component, a softener dopant material doped into the A site (Pb), and a relaxor ferroelectric material doped into the B site (ZrTi).

[0106] The softener dopant material can improve the piezoelectric and dielectric characteristics of the inorganic material part. For example, the piezoelectric strain coefficient (d 33 ) of the inorganic material part can be increased. The softener dopant material according to the embodiments of the present specification may contain a divalent to trivalent element. Since a morphotropic phase boundary (MPB) can be formed by including a softener dopant material in the PZT-based material (PbZrTiO3), the piezoelectric and dielectric characteristics can be improved. For example, the softener dopant material may contain strontium (Sr 2+ ), barium (Ba 2+ ), lanthanum (La 2+ ), neodymium (Nd 3+ ), calcium (Ca 2+ ), yttrium (Y 3+ ), erbium (Er 3+ ), or ytterbium (Yb 3+) can replace part of lead (Pb) in the PZT-based material (PbZrTiO3), and the replacement amount can be 2 to 20 mol%. For example, when the replacement amount is less than 2 mol% or exceeds 20 mol%, the perovskite crystal structure collapses, so the electrical coupling coefficient (kP) and the piezoelectric strain coefficient (d 33 ) may decrease. When replacing with a softener dopant material, a morphotropic phase boundary can be formed, and high piezoelectric and dielectric properties can be obtained at the morphotropic phase boundary, so a vibration device with high piezoelectric and dielectric properties can be realized.

[0107] According to the examples of this specification, the relaxor ferroelectric material doped in the PZT-based material (PbZrTiO3) can improve the electrical strain characteristics of the inorganic material part. The relaxor ferroelectric material according to the examples of this specification can include, but is not limited to, a PMN (lead magnesium niobate)-based material or a PNN (lead nickel niobate)-based material. The PMN-based material can include lead (Pb), magnesium (Mg), and niobium (Nb), and can be, for example, Pb(Mg,Nb)O3. The PNN-based material can include lead (Pb), nickel (Ni), and niobium (Nb), and can be, for example, Pb(Ni,Nb)O3. For example, the relaxor ferroelectric material doped in the PZT-based material (PbZrTiO3) can replace part of zirconium (Zr) and titanium (Ti) in the PZT-based material (PbZrTiO3), and the replacement amount can be 5 to 25 mol%. For example, when the replacement amount is less than 5 mol% or exceeds 25 mol%, the perovskite crystal structure collapses, so the electrical coupling coefficient (kP) and the piezoelectric strain coefficient (d 33 ) may decrease.

[0108] According to the examples of this specification, the inorganic material part formed in each of the plurality of first parts 211a has a piezoelectric strain coefficient (d 33) For additional improvement, it can further include a donor substance doped into the B-site (ZrTi) of the PZT-based material (PbZrTiO3). For example, the donor substance doped into the B-site (ZrTi) can include elements with a valence of +4 to +6. For example, the donor substance doped into the B-site (ZrTi) can include tellurium (Te), germanium (Ge), uranium (U), niobium (Nb), tantalum (Ta), antimony (Sb), or tungsten (W).

[0109] The inorganic material part composed of a plurality of first parts 211a according to the embodiments of this specification can have a piezoelectric deformation coefficient (d 33 ) of 1,000 pC / N or more along the thickness direction (Z), so that a vibration device with improved vibration characteristics can be realized. For example, a vibration device with improved vibration characteristics can be realized for a large-area device (or object).

[0110] In FIGS. 4A to 4F, the second part 211b can be arranged between the plurality of first parts 211a or arranged to surround each of the plurality of first parts 211a. Thereby, the vibration part 211 of the vibration generator 210 or the vibration device 200 can increase the vibration energy due to the links in the unit cell of the first part 211a by the second part 211b, so that the vibration characteristics can be increased, and piezoelectric characteristics and flexibility can be ensured. For example, the second part 211b can be any one of epoxy-based polymers, acrylic-based polymers, and silicone-based polymers, but is not limited thereto.

[0111] The second part 211b according to the embodiment of this specification may be composed of an organic material part. For example, the organic material part can be arranged between each of the inorganic material parts, so as to absorb the impact applied to the inorganic material part (or the first part), release the stress concentrated on the inorganic material part, improve the durability of the vibrating part 211 of the vibration generator 210 or the vibration device, and also provide flexibility to the vibrating part 211 of the vibration generator 210 or the vibration device.

[0112] The second part 211b according to the embodiment of this specification can have a lower modulus and viscoelasticity compared to the first part 211a. Thereby, the reliability of the first part 211a, which is vulnerable to impact due to the brittle characteristics of the first part 211a, can be improved. For example, the second part 211b can be composed of a material having a loss factor of 0.01 to 1 and a modulus of 0.1 to 10 [GPa].

[0113] The organic material part constituting the second part 211b can include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material having flexible characteristics and soft characteristics compared to the inorganic material part of the first part 211a. For example, the second part 211b can be represented by, but not limited to, an adhesive part, a stretching part, a bending part, a damping part, or a soft part.

[0114] Therefore, the vibrating part 211 of the vibrator 210 according to various embodiments of the present specification can have the shape of a single thin film by arranging (or connecting) a plurality of first parts 211a and second parts 211b on the same plane. For example, the vibrating part 211 can vibrate in the vertical direction by the first part 211a having vibration characteristics, and can be bent into a curved surface shape by the second part 211b having flexibility or softness. Also, in the vibrating part 211 of the vibrator 210 according to various embodiments of the present specification, the size of the first part 211a and the size of the second part 211b can be set according to the piezoelectric characteristics and flexibility required for the vibrating part 211. For example, in the case of the vibrating part 211 where piezoelectric characteristics are required more than flexibility, the size of the first part 211a can be configured to be larger than the size of the second part 211b. As another example of the present specification, in the case of the vibrating part 211 where flexibility is required more than piezoelectric characteristics, the size of the second part 211b can be configured to be larger than the size of the first part 211a. Therefore, since the size of the vibrating part 211 can be adjusted according to the required characteristics, there is an advantage that the design of the vibrating part 211 is easy.

[0115] One or more of the vibrating parts 211 shown in FIGS. 4A to 4F can be at least one of the vibrating parts 211 of the plurality of vibrating structures 210A, 210B, 210C, 210D shown in FIG. 2. For example, each of the plurality of vibrating structures 210A, 210B, 210C, 210D can be realized by one or more of the vibrating parts 211 described in FIGS. 4A to 4F according to the characteristics required for the sound generated in conjunction with the vibration of the vibration device 200.

[0116] According to an embodiment of the present specification, the vibrating structure 210A can include one or more of the vibrating parts 211 described in FIGS. 4A to 4F.

[0117] FIG. 5 is a diagram showing the acoustic processing circuit of FIG. 1. Referring to FIGS. 1 and 5, the acoustic processing circuit 300 according to the embodiment of the present specification can generate a vibration drive signal (or acoustic signal) based on an input sound source signal and noise signal, and supply the generated vibration drive signal to the vibration device 200 to vibrate the vibration device 200. For example, the acoustic processing circuit 300 can vibrate the vibration generator 210 of the vibration device 200.

[0118] According to the embodiment of the present specification, the acoustic processing circuit 300 can generate an alternating current type vibration drive signal including a vibration drive signal of a first polarity and a vibration drive signal of a second polarity based on the sound source signal and the noise signal. The vibration drive signal of the first polarity is any one of a positive polarity (+) vibration drive signal and a negative polarity (-) vibration drive signal, and the vibration drive signal of the second polarity can be any one of a positive polarity (+) vibration drive signal and a negative polarity (-) vibration drive signal. For example, the vibration drive signal of the first polarity can be supplied to the first electrode layer (E1) of the vibration structure 210A via the first terminal of the flexible cable 220, the first pad electrode of the pad portion 201, and the first power supply line (PL1). The vibration drive signal of the second polarity can be supplied to the second electrode layer (E2) of the vibration structure 210A via the second terminal of the flexible cable 220, the second pad electrode of the pad portion 201, and the second power supply line (PL2).

[0119] According to the embodiment of the present specification, the acoustic processing circuit 300 can receive the sound source signal from the sound source providing system 400. For example, the sound source providing system 400 can be a vehicle convenience system such as a navigation system, an audio system, or a multimedia system installed in a vehicle, but is not limited thereto.

[0120] According to the embodiment of the present specification, the acoustic processing circuit 300 can receive the noise signal from the microphone device 100. For example, the acoustic processing circuit 300 can receive the first noise signal from the first microphone 110 and the second noise signal from the second microphone 120.

[0121] According to the embodiments of this specification, the acoustic processing circuit 300 can generate a noise cancellation signal (or noise inverse phase signal) having a phase opposite to that of the noise signal in order to remove the noise signal based on the noise signal. For example, the acoustic processing circuit 300 can generate a first noise cancellation signal (or first noise inverse phase signal) having a phase opposite to that of the first noise signal in order to remove the first noise signal based on the first noise signal. For example, the acoustic processing circuit 300 can generate a second noise cancellation signal (or second noise inverse phase signal) having a phase opposite to that of the second noise signal in order to remove the second noise signal based on the second noise signal. For example, the acoustic processing circuit 300 can combine the sound source signal and the noise cancellation signal to generate a vibration drive signal. For example, the acoustic processing circuit 300 can combine the sound source signal, the first noise cancellation signal, and the second noise cancellation signal to generate a vibration drive signal.

[0122] The acoustic processing circuit 300 according to the embodiments of this specification can include an input unit 310, a signal processing unit (or noise cancellation signal generation unit) 320, and a drive signal generation unit (or signal combination unit) 330. However, the configuration of the acoustic processing circuit 300 is not limited thereto.

[0123] According to the embodiments of this specification, the input unit 310 can receive the sound source signal and the noise signal, and provide the received sound source signal and noise signal to the signal processing unit 320.

[0124] According to the embodiments of this specification, the input unit 310 can include a first input unit (or sound source input unit or sound source signal input unit) 311 that receives the sound source signal and provides it to the signal processing unit 320, and a second input unit (or noise input unit or noise signal input unit) 312 that receives the noise signal and provides it to the signal processing unit 320. For example, the second input unit 312 can include a second-1 input unit (or first noise input unit or first noise signal input unit) 312-1 that receives the first noise signal and provides it to the signal processing unit 320, and a second-2 input unit (or second noise input unit or second noise signal input unit) 312-2 that receives the second noise signal and provides it to the signal processing unit 320.

[0125] According to the embodiments of this specification, the signal processing unit 320 can generate a noise cancellation signal based on the noise signal. For example, the signal processing unit 320 can include a noise signal processing unit that generates a noise cancellation signal based on the noise signal. For example, the signal processing unit 320 can include a first noise signal processing unit 321 that generates a first noise cancellation signal based on the first noise signal, and a second noise signal processing unit 322 that generates a second noise cancellation signal based on the second noise signal.

[0126] According to the embodiments of this specification, the drive signal generation unit 330 can generate a vibration drive signal based on the sound source signal and the noise cancellation signal. For example, the drive signal generation unit 330 can combine the sound source signal and the noise cancellation signal to generate a vibration drive signal. For example, the drive signal generation unit 330 can combine the sound source signal from the input unit 310 and the noise cancellation signal from the signal processing unit 320 to generate a vibration drive signal. For example, the drive signal generation unit 330 can combine the sound source signal from the first input unit 311, the first noise cancellation signal from the first noise signal processing unit 321, and the second noise cancellation signal from the second noise signal processing unit 322 to generate a vibration drive signal.

[0127] Therefore, the acoustic processing circuit 300 according to the embodiments of this specification provides a vibration drive signal including a sound source signal corresponding to a sound source and a noise cancellation signal having a phase opposite to that of the noise to the vibration device 200 to vibrate the vibration device 200, and the vibration of the vibration device 200 provides the sound source to the user through bone conduction.

[0128] Noise around the user can be transmitted to the user through air conduction of the air passage using the vibration of the eardrum, and the vibration of the eardrum corresponding to the noise can be canceled and removed by the vibration of the vibration device 200 generated by the noise cancellation signal. Thus, the user can receive only the sound source generated by the vibration of the vibration device 200 by the sound source signal corresponding to the sound source through bone conduction, so that the user can listen to the sound source with excellent sound quality. For example, "around" can be, but is not limited to, a range in which the microphone device 100 can receive noise similar to that generated from the user's ear, or a range in which the user can easily receive the generated sound, such as a range of 0 to 50 cm, particularly a range of 0 to 20 cm, and more specifically a range of 0 to 10 cm.

[0129] FIG. 6 is a diagram showing a vibration generator according to another embodiment of the present specification. FIG. 7 is a diagram showing the vibration device of FIG. 6. FIG. 8 is a cross-sectional view taken along line II-II' shown in FIG. 7. FIG. 6 is obtained by changing the configuration of the vibration generator of the vibration generator shown in FIG. 1. Accordingly, hereinafter, duplicate descriptions of the remaining configurations except for the configurations related to the vibration generator will be omitted or briefly described.

[0130] Referring to FIGS. 6 to 8, the vibration generator 210 according to another embodiment of the present specification may include a plurality of vibration structures 210A and 210B.

[0131] For example, the vibration generator 210 according to another embodiment of the present specification may include a plurality of vibration structures 210A and 210B that are electrically separated and arranged while being separated from each other along the first direction (X) (or the horizontal direction). The plurality of vibration structures 210A and 210B may be electrically separated and arranged while being separated from each other along the second direction (Y) (or the vertical direction).

[0132] Each of the plurality of vibrating structures 210A, 210B can vibrate by alternately repeating contraction and expansion due to the piezoelectric effect (or piezoelectric property). The vibration generator 210 according to other embodiments of the present specification can directly vibrate an object by vibrating in the thickness direction (Z) by alternately repeating contraction and expansion due to the inverse piezoelectric effect. The vibration generator 210 can include a plurality of vibrating structures 210A, 210B arranged at regular intervals or tiled. For example, the vibration generator 210 can be, but is not limited to, a vibration array, a vibration array section, a vibration module array section, a vibration array structure, a tiling vibration array, a tiling vibration array module, or a tiling vibration film.

[0133] Each of the plurality of vibrating structures 210A, 210B according to other embodiments of the present specification can have a rectangular shape or a square shape, but is not limited thereto. For example, each of the plurality of vibrating structures 210A, 210B can have a rectangular shape with a width of 5 cm or more. For example, each of the plurality of vibrating structures 210A, 210B can have a square form with a size of 5 cm × 5 cm or more.

[0134] Each of the plurality of vibrating structures 210A, 210B is arranged in an i×j shape on the same plane or tiled, so that the vibration generator 210 can be enlarged in area by tiling a plurality of vibrating structures 210A, 210B having a relatively small size. For example, i is the number of vibrating structures arranged along the first direction (X) and is a natural number of 2 or more, and j is the number of vibrating structures arranged along the second direction (Y) and can be a natural number of 1 or more that is the same as or different from i.

[0135] Each of the plurality of vibrating structures 210A and 210B can be realized as one vibrating device (or single vibrating device) that is not driven independently but is driven in the shape of a complete single entity by being arranged at regular intervals or tiled. According to other embodiments of this specification, based on the first direction (X), the first separation distance (D1) between the plurality of vibrating structures 210A and 210B can be variously set by the size of the object or the user. Thereby, each of the reproduction band of the sound generated in conjunction with the single-body vibration of the plurality of vibrating structures 210A and 210B and the sound pressure characteristics of the sound can be increased.

[0136] The vibration generator 210 according to other embodiments of this specification can include a first vibrating structure 210A and a second vibrating structure 210B.

[0137] According to the embodiments of this specification, the first vibrating structure 210A and the second vibrating structure 210B can be electrically separated while being separated from each other along the first direction (X). For example, the first vibrating structure 210A and the second vibrating structure 210B can be arranged in a 2×1 form or tiled.

[0138] According to the embodiments of this specification, the first vibrating structure 210A can be arranged in the third region of the object, and the second vibrating structure 210B can be arranged in the fourth region of the object. For example, the third region of the object is the region of the object corresponding to the left ear of the user, and the fourth region of the object can be the region of the object corresponding to the right ear of the user.

[0139] According to the embodiments of this specification, the first vibration structure 210A vibrates under the vibration drive signal from the acoustic processing circuit 300 and can vibrate the third region of the object (or the left ear of the user). For example, the first vibration structure 210A can vibrate the left ear of the user and the peripheral region of the left ear under the vibration drive signal. For example, the first vibration structure 210A vibrates under the first vibration drive signal (or the left vibration drive signal or the first acoustic signal) from the acoustic processing circuit 300 and can vibrate the left ear of the user and the peripheral region of the left ear (or the third region of the object).

[0140] According to the embodiments of this specification, the second vibration structure 210B vibrates under the vibration drive signal from the acoustic processing circuit 300 and can vibrate the fourth region of the object (or the right ear of the user). For example, the second vibration structure 210B can vibrate the right ear of the user and the peripheral region of the right ear under the vibration drive signal. For example, the second vibration structure 210B vibrates under the second vibration drive signal (or the right vibration drive signal or the second acoustic signal) from the acoustic processing circuit 300 and can vibrate the right ear of the user and the peripheral region of the right ear (or the fourth region of the object).

[0141] According to the embodiments of this specification, the first vibration drive signal and the second vibration drive signal provided to the first vibration structure 210A and the second vibration structure 210B respectively may be the same or different.

[0142] In the vibration generating device according to other embodiments of this specification, the acoustic processing circuit 300 can generate a vibration drive signal based on the sound source signal and the noise signal, and supply the generated vibration drive signal to the vibration device 200 to vibrate the vibration device 200.

[0143] According to the embodiments of this specification, the acoustic processing circuit 300 can supply vibration drive signals to each of the first and second vibration structures 210A and 210B of the vibration generator 210. For example, the acoustic processing signal can supply a first vibration drive signal to the first vibration structure 210A and a second vibration drive signal to the second vibration structure 210B.

[0144] According to the embodiments of this specification, the acoustic processing circuit 300 can supply a first vibration drive signal generated based on the sound source signal and the first noise cancellation signal to the first vibration structure 210A, and supply a second vibration drive signal generated based on the sound source signal and the second noise cancellation signal to the second vibration structure 210B.

[0145] According to the vibration generating device according to other embodiments of this specification, the acoustic processing circuit 300 can generate a first vibration drive signal based on the sound source signal and the first noise cancellation signal, supply it to the first vibration structure 210A, generate a second vibration drive signal based on the sound source signal and the second noise cancellation signal, and supply it to the second vibration structure 210B.

[0146] Therefore, the noise transmitted through the user's left ear and air conduction is canceled and removed by the vibration of the first vibration structure 210A corresponding to the first noise cancellation signal included in the first vibration drive signal, and the noise transmitted through the user's right ear and air conduction can be canceled and removed by the vibration of the second vibration structure 210B corresponding to the second noise cancellation signal included in the second vibration drive signal. Thus, the user can receive the vibration of the first and second vibration structures 210A and 210B corresponding to the sound source signal, and thereby the user can hear a sound source with excellent sound quality.

[0147] Each of the first vibration structure 210A and the second vibration structure 210B according to other embodiments of this specification can include a vibration part 211, a first electrode layer (E1), and a second electrode layer (E2).

[0148] The descriptions of the vibrating portion 211, the first electrode layer (E1), and the second electrode layer (E2) are substantially the same as the descriptions of the vibrating portion 211, the first electrode layer (E1), and the second electrode layer (E2) described in FIG. 3, and thus redundant descriptions thereof are omitted or simplified.

[0149] The oscillator 210 according to other embodiments of the present specification may further include a first protection member 213 and a second protection member 215.

[0150] The first protection member 213 may be disposed on the first surface of the oscillator 210. For example, the first protection member 213 may be disposed on the first surface of each of the plurality of vibration structures 210A, 210B. For example, the first protection member 213 may cover the first electrode layer (E1) disposed on the first surface of each of the plurality of vibration structures 210A, 210B. Thereby, the first protection member 213 can be commonly connected to the first surface of each of the plurality of vibration structures 210A, 210B or can commonly support the first surface of each of the plurality of vibration structures 210A, 210B. Therefore, the first protection member 213 can protect the first surface or the first electrode layer (E1) of each of the plurality of vibration structures 210A, 210B.

[0151] The first protection member 213 according to other embodiments of the present specification may be disposed on the first surface of each of the plurality of vibration structures 210A, 210B via the first adhesive layer 212. For example, the first protection member 213 may be directly disposed on the first surface of each of the plurality of vibration structures 210A, 210B by a film lamination process mediated by the first adhesive layer 212. Therefore, each of the plurality of vibration structures 210A, 210B can be integrated (or disposed) or tiled on the first protection member 213 so as to have a certain interval (D1).

[0152] The second protective member 215 can be disposed on the second surface of the vibration generator 210. For example, the second protective member 215 can cover the second electrode layer (E2) disposed on the second surface of each of the plurality of vibration structures 210A, 210B. Thereby, the second protective member 215 can be commonly connected to the second surface of each of the plurality of vibration structures 210A, 210B or can commonly support the second surface of each of the plurality of vibration structures 210A, 210B. Therefore, the second protective member 215 can protect the second surface or the second electrode layer (E2) of each of the plurality of vibration structures 210A, 210B.

[0153] The second protective member 215 according to another embodiment of the present specification can be disposed on the second surface of each of the plurality of vibration structures 210A, 210B via the second adhesive layer 214. For example, the second protective member 215 can be directly disposed on the second surface of each of the plurality of vibration structures 210A, 210B by a film lamination process mediated by the second adhesive layer 214. Therefore, each of the plurality of vibration structures 210A, 210B can be integrated (or disposed) with the second protective member 215 or arranged in a tile-like manner so as to have a certain interval (D1).

[0154] Each of the first protective member 213 and the second protective member 215 according to another embodiment of the present specification can include a plastic film. For example, each of the first and second protective members 213, 215 can be a polyimide film or a polyethylene terephthalate film, but is not limited thereto.

[0155] The first adhesive layer 212 can be disposed between the first surface of each of the plurality of vibration structures 210A, 210B and between the plurality of vibration structures 210A, 210B. For example, the first adhesive layer 212 is formed on the back surface (or inner surface) of the first protective member 213 facing the first surface of the vibration generator 210, is disposed on the first surface of each of the plurality of vibration structures 210A, 210B, and can be filled between the plurality of vibration structures 210A, 210B.

[0156] The second adhesive layer 214 can be disposed on each second surface of the plurality of vibrating structures 210A, 210B and between the plurality of vibrating structures 210A, 210B. For example, the second adhesive layer 214 can be formed on the front surface (or inner surface) of the second protective member 215 facing the second surface of the vibration generator 210, disposed on each second surface of the plurality of vibrating structures 210A, 210B, and filled between the plurality of vibrating structures 210A, 210B.

[0157] The first adhesive layer 212 and the second adhesive layer 214 can be connected or joined to each other between the plurality of vibrating structures 210A, 210B. Thereby, each of the plurality of vibrating structures 210A, 210B can be surrounded by the first adhesive layer 212 and the second adhesive layer 214. For example, the first adhesive layer 212 and the second adhesive layer 214 can completely surround the entirety of the plurality of vibrating structures 210A, 210B. For example, the first adhesive layer 212 and the second adhesive layer 214 can be represented by a cover member or the like, but are not limited thereto. When the first adhesive layer 212 and the second adhesive layer 214 are cover members, the first protective member 213 can be disposed on the first surface of the cover member, and the second protective member 215 can be disposed on the second surface of the cover member. For example, for the sake of convenience of explanation, the first adhesive layer 212 and the second adhesive layer 214 are shown as the first adhesive layer 212 and the second adhesive layer 214, but are not limited thereto, and can be disposed as one adhesive layer.

[0158] Each of the first adhesive layer 212 and the second adhesive layer 214 according to other embodiments of the present specification can include an electrically insulating material that has adhesiveness and is capable of compression and restoration. For example, each of the first adhesive layer 212 and the second adhesive layer 214 can include, but is not limited to, an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin.

[0159] The vibration device 200 or the vibration generator 210 according to other embodiments of the present specification may further include a first power supply line (PL1), a second power supply line (PL2), and a pad portion 201.

[0160] The first power supply line (PL1) may be disposed on the first protective member 213. For example, the first power supply line (PL1) may be disposed on the back surface of the first protective member 213 facing the first surface of the vibration generator 210. The first power supply line (PL1) may be electrically connected to the first electrode layer (E1) of each of the plurality of vibration structures 210A, 210B. For example, the first power supply line (PL1) may be directly electrically connected to the first electrode layer (E1) of each of the plurality of vibration structures 210A, 210B. For example, the first power supply line (PL1) may be electrically connected to the first electrode layer (E1) of each of the plurality of vibration structures 210A, 210B via an anisotropic conductive film. As another example in the present specification, the first power supply line (PL1) may be electrically connected to the first electrode layer (E1) of each of the plurality of vibration structures 210A, 210B through a conductive substance (or particles) contained in the first adhesive layer 212.

[0161] The first power supply line (PL1) according to other embodiments of the present specification may include first and second upper power supply lines 213a, 213b disposed along the second direction (Y). For example, the first upper power supply line 213a may be electrically connected to the first electrode layer (E1) of the first vibration structure 210A among the plurality of vibration structures 210A, 210B. The second upper power supply line 213b may be electrically connected to the first electrode layer (E1) of the second vibration structure 210B among the plurality of vibration structures 210A, 210B.

[0162] The second power supply line (PL2) can be disposed on the second protection member 215. For example, the second power supply line (PL2) can be disposed on the front surface of the second protection member 215 facing the second surface of the vibration generator 210. The second power supply line (PL2) can be electrically connected to the second electrode layer (E2) of each of the plurality of vibration structures 210A, 210B. For example, the second power supply line (PL2) can be directly electrically connected to the second electrode layer (E2) of each of the plurality of vibration structures 210A, 210B. For example, the second power supply line (PL2) can be electrically connected to the second electrode layer (E2) of each of the plurality of vibration structures 210A, 210B through an anisotropic conductive film. As another example in this specification, the second power supply line (PL2) can be electrically connected to the second electrode layer (E2) of each of the plurality of vibration structures 210A, 210B through a conductive substance (or particles) contained in the second adhesive layer 214.

[0163] The second power supply line (PL2) according to another embodiment of this specification can include a first lower power supply line 215a and a second lower power supply line 215b disposed along the second direction (Y). For example, the first lower power supply line 215a can be electrically connected to the second electrode layer (E2) of the first vibration structure 210A among the plurality of vibration structures 210A, 210B. The second lower power supply line 215b can be electrically connected to the second electrode layer (E2) of the second vibration structure 210B among the plurality of vibration structures 210A, 210B.

[0164] The pad portion 201 can electrically connect the first power supply line (PL1) and the second power supply line (PL2). For example, the pad portion 201 can be disposed on the vibration generator 210 so as to be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2). The pad portion 201 according to another embodiment of this specification can include a first pad electrode and a second pad electrode. The first pad electrode can be electrically connected to one side of the first power supply line (PL1). The second pad electrode can be electrically connected to one side of the second power supply line (PL2).

[0165] The first pad electrode can be commonly connected to one side of each of the first upper power supply line 213a and the second upper power supply line 213b of the first power supply line (PL1). For example, one side of each of the first upper power supply line 213a and the second upper power supply line 213b can be branched from the first pad electrode.

[0166] The second pad electrode can be commonly connected to one side of each of the first lower power supply line 215a and the second lower power supply line 215b of the second power supply line (PL2). For example, one side of each of the first lower power supply line 215a and the second lower power supply line 215b can be branched from the second pad electrode.

[0167] The vibration device 200 or the vibration generator 210 according to other embodiments of the present specification can further include a flexible cable 220. The flexible cable 220 is electrically connected to the pad portion 201 disposed on the vibration device 200 or the vibration generator 210, and can supply a vibration drive signal (or an acoustic signal) provided from the acoustic processing circuit 300 to the vibration device 200 or the vibration generator 210.

[0168] The flexible cable 220 according to other embodiments of the present specification can include a first terminal and a second terminal. The first terminal can be electrically connected to the first pad electrode of the pad portion 201. The second terminal can be electrically connected to the second pad electrode of the pad portion 201. For example, the flexible cable 220 can be a flexible printed circuit cable or a flexible flat cable, but is not limited thereto.

[0169] The vibration generator 210 according to other embodiments of the present specification can further include a plate 216. Since the plate 216 is the same as the plate 216 described in FIGS. 2 and 3, redundant description thereof is omitted.

[0170] FIG. 9 is a diagram showing a vibration generator according to another embodiment of the present specification. FIG. 9 is a modification of the configuration of the vibration device of the vibration generator shown in FIG. 1. Accordingly, hereinafter, redundant descriptions of the remaining configurations excluding the vibration device and related configurations will be omitted or briefly described.

[0171] Referring to FIG. 9, the vibration device 200 of the vibration generator according to another embodiment of the present specification can include a plurality of vibration generators. For example, the vibration device 200 is disposed in the third region of the object and includes a first vibration generator (or left vibration generator) 210-1 that vibrates by a vibration drive signal (or acoustic signal), and a second vibration generator (or right vibration generator) 210-2 that is disposed in the fourth region of the object and vibrates by the vibration drive signal. For example, the first vibration generator 210-1 and the second vibration generator 210-2 can be one or more.

[0172] According to an embodiment of the present specification, the first vibration generator 210-1 and the second vibration generator 210-2 can have the same configuration as the vibration generator 210 described with reference to FIGS. 2 to 5F. For example, the third region of the object can be a region of the object corresponding to the left ear of the user, and the fourth region of the object can be a region of the object corresponding to the right ear of the user.

[0173] According to an embodiment of the present specification, each of the first vibration generator 210-1 and the second vibration generator 210-2 can include vibration structures 210A and 210B. For example, the first vibration generator 210-1 can include a first vibration structure 210A, and the second vibration generator 210-2 can include a second vibration structure 210B. For example, each of the first vibration structure 210A and the second vibration structure 210B can be one or more.

[0174] According to the embodiments of this specification, the first vibration generator 210-1 can vibrate under the vibration driving signal from the acoustic processing circuit 300 and vibrate the user's left ear. For example, the first vibration generator 210-1 can vibrate under the vibration driving signal and vibrate the user's left ear and the surrounding area of the left ear. For example, the first vibration generator 210-1 can vibrate under the first vibration driving signal (or the left vibration driving signal or the first acoustic signal) and vibrate the user's left ear and the surrounding area of the left ear.

[0175] According to the embodiments of this specification, the second vibration generator 210-2 can vibrate under the vibration driving signal from the acoustic processing circuit 300 and vibrate the user's right ear. For example, the second vibration generator 210-2 can vibrate under the vibration driving signal and vibrate the user's right ear and the surrounding area of the right ear. For example, the second vibration generator 210-2 can vibrate under the second vibration driving signal (or the right vibration driving signal or the second acoustic signal) and vibrate the user's right ear and the surrounding area of the right ear.

[0176] According to the embodiments of this specification, the first vibration driving signal and the second vibration driving signal provided to each of the first vibration generator 210-1 and the second vibration generator 210-2 can be the same or different. For example, the first vibration driving signal can be commonly supplied to a plurality of first vibration structures 210A of the first vibration generator 210-1, and the second vibration driving signal can be commonly supplied to a plurality of second vibration structures 210B of the second vibration generator 210-2.

[0177] In the vibration generating device according to other embodiments of this specification, the acoustic processing circuit 300 can generate a vibration driving signal based on the sound source signal and the noise signal, and supply the generated vibration driving signal to the vibration device 200 to vibrate the vibration device 200. For example, the acoustic processing circuit 300 can supply a vibration driving signal to the first and second vibration generators 210-1 and 210-2 of the vibration device 200. For example, the acoustic processing circuit 300 can supply a first vibration driving signal to the first vibration generator 210-1 and supply a second vibration driving signal to the second vibration generator 210-2.

[0178] According to the embodiments of this specification, the drive signal generation unit 330 of the acoustic processing circuit 300 supplies the first vibration drive signal generated based on the sound source signal and the first noise cancellation signal to the first vibration generator 210-1, and can supply the second vibration drive signal generated based on the sound source signal and the second noise cancellation signal to the second vibration generator 210-2.

[0179] According to the vibration generator according to another embodiment of this specification, the acoustic processing circuit 300 generates a first vibration drive signal based on the sound source signal and the first noise cancellation signal, supplies it to the first vibration generator 210-1, generates a second vibration drive signal based on the sound source signal and the second noise cancellation signal, and can supply it to the second vibration generator 210-2.

[0180] Therefore, the noise transmitted through the user's left ear and air conduction is canceled and removed by the vibration of the first vibration generator 210-1 corresponding to the first noise cancellation signal included in the first vibration drive signal, and the noise transmitted through the user's right ear and air conduction can be canceled and removed by the vibration of the second vibration generator 210-2 corresponding to the second noise cancellation signal included in the second vibration drive signal. Thus, the user can receive the vibration of the first and second vibration generators 210-1 and 210-2 corresponding to the sound source signal, and thereby can hear a sound source with excellent sound quality.

[0181] FIG. 10 is a diagram showing a vehicle according to an embodiment of this specification. FIGS. 11 to 13 are diagrams showing the headrest of FIG. 10.

[0182] FIG. 10 is a diagram showing the seat of the vehicle according to an embodiment of this specification. Referring to FIGS. 1, 10 to 13, the vibration generator according to the embodiment of this specification can be arranged on the seat of the vehicle. For example, the vibration generator can be arranged on all seats in the vehicle including the driver's seat and the passenger seat.

[0183] The vibration device 200 can be arranged on the headrest (H) of the seat. The microphone device 100 can be arranged adjacent to the vibration device 200. For example, the microphone device 100 can be arranged on the headrest (H) of the seat. The acoustic processing circuit 300 can be arranged on the seat. For example, it can be arranged on the headrest (H), the backrest (B), the seat part (S), etc. of the seat.

[0184] According to the embodiments of this specification, the headrest (H) can include a support area (SA) arranged in the central area of the headrest (H) with respect to the central line (CL) to support the head of the user (or passenger), and an edge area (PA) arranged at the edge part of the headrest (H). For example, the support area (SA) can include a first support area (or left support area) (SA1) which is the area on the left side centered on the center line (CL), and a second support area (or right support area) (SA2) which is the area on the right side centered on the center line (CL). For example, the first support area (SA1) can be the area where the left ear of the user is located, and the second support area (SA2) can be the area where the right ear of the user is located. For example, the edge area (PA) can include a first edge area (or left edge area) (PA1) which is the left edge of the headrest (H), and a second edge area (or right edge area) (PA2) which is the right edge of the headrest (H). For example, the first edge area (PA1) can be located on the left side of the first support area (SA1), and the second edge area (PA2) can be located on the right side of the second support area (SA2).

[0185] The vehicle according to the embodiments of this specification can include the vibration generating device in FIG. 1. The vehicle according to the embodiments of this specification can include the microphone device 100 and the vibration device 200 arranged on the headrest (H).

[0186] According to the embodiments of this specification, the microphone device 100 can include a first microphone 110 disposed in a first edge region (PA1) and a second microphone 120 disposed in a second edge region (PA2). For example, the first microphone 110 is disposed in the first edge region (PA1) and can receive the noise in the first edge region (PA1). For example, the first microphone 110 can receive the noise around the left ear of the user. For example, the second microphone 120 is disposed in the second edge region (PA2) and can receive the noise in the second edge region (PA2). For example, the second microphone 120 can receive the noise around the right ear of the user. The first microphone 110 and the second microphone 120 can convert the received noise into an electrical signal and provide the noise signal to the acoustic processing circuit 300.

[0187] Referring to FIG. 11, the vibration device 200 can be disposed in a first support region (SA1). For example, the vibration device 200 includes a vibration generator 210 disposed in the first support region (SA1), and the vibration generator 210 can include one or more vibration structures 210A.

[0188] The vibration device 200 can vibrate according to a vibration drive signal from the acoustic processing circuit 300. For example, the vibration generator 210 or the vibration structure 210A can vibrate according to the vibration drive signal from the acoustic processing circuit 300 and vibrate the first support region (SA1). For example, the vibration generator 210 or the vibration structure 210A can vibrate according to the vibration drive signal from the acoustic processing circuit 300 and vibrate the left ear of the user located in the first support region (SA1). For example, the vibration generator 210 or the vibration structure 210A can vibrate according to the vibration drive signal from the acoustic processing circuit 300 and vibrate the left ear of the user and the surrounding area of the left ear located in the first support region (SA1).

[0189] Referring to FIG. 12, the vibration device 200 can be disposed in the second support region (SA2). For example, the vibration device 200 can include a vibration generator 210 disposed in the second support region (SA2). For example, the vibration generator 210 can include one vibration structure 210B disposed in the second support region (SA2).

[0190] The vibration device 200 can vibrate by a vibration drive signal from the acoustic processing circuit 300. For example, the vibration generator 210 or the vibration structure 210B can vibrate by a vibration drive signal from the acoustic processing circuit 300 to vibrate the second support region (SA2). For example, the vibration generator 210 or the vibration structure 210B can vibrate by a vibration drive signal from the acoustic processing circuit 300 to vibrate the right ear of the user located in the second support region (SA2). For example, the vibration generator 210 or the vibration structure 210A can vibrate by a vibration drive signal from the acoustic processing circuit 300 to vibrate the right ear of the user and the peripheral region of the right ear located in the second support region (SA2).

[0191] Referring to FIG. 13, the vibration device 200 can be disposed across the first support region (SA1) and the second support region (SA2). For example, the vibration device 200 can include a vibration generator 210 disposed across the first support region (SA1) and the second support region (SA2). For example, the vibration generator 210 can include one or more vibration structures 210A disposed across the first support region (SA1) and the second support region (SA2).

[0192] The vibration device 200 can vibrate in response to a vibration drive signal from the acoustic processing circuit 300. For example, the vibration generator 210 or the vibration structure 210A can vibrate in response to the vibration drive signal from the acoustic processing circuit 300 and vibrate the first support region (SA1) and the second support region (SA2). For example, the vibration generator 210 or the vibration structure 210A can vibrate in response to the vibration drive signal from the acoustic processing circuit 300 and vibrate the left ear and the right ear of the user located in the first and second support regions (SA1, SA2). For example, the vibration generator 210 or the vibration structure 210A can vibrate in response to the vibration drive signal from the acoustic processing circuit 300 and vibrate the left ear of the user, the peripheral region of the left ear, the right ear, and the peripheral region of the right ear located in the first and second support regions (SA1, SA2).

[0193] FIGS. 14 and 15 are diagrams showing a headrest of a vehicle according to another embodiment of the present specification. FIGS. 14 and 15 show a modified configuration of the vibration device of the headrest of the vehicle in FIG. 10. Accordingly, hereinafter, duplicate descriptions of the remaining configurations excluding the vibration device and related configurations will be omitted or described briefly.

[0194] A vehicle according to another embodiment of the present specification can include the vibration generating device of FIG. 6. Referring to FIGS. 6, 14, and 15, a vehicle according to another embodiment of the present specification can include a microphone device 100 and a vibration device 200 disposed in a headrest (H).

[0195] According to the embodiments of this specification, the microphone device 100 can include a first microphone 110 disposed in a first edge region (PA1) and a second microphone 120 disposed in a second edge region (PA2). For example, the first microphone 110 is disposed in the first edge region (PA1) and can receive the noise in the first edge region (PA1). For example, the first microphone 110 can receive the noise around the left ear of the user. For example, the second microphone 120 is disposed in the second edge region (PA2) and can receive the noise in the second edge region (PA2). For example, the second microphone 120 can receive the noise around the right ear of the user. The first microphone 110 and the second microphone 120 can convert the received noise into an electrical signal and provide the noise signal to the acoustic processing circuit 300.

[0196] The vibration device 200 can vibrate the first support region (SA1) and the second support region (SA2) by a vibration drive signal from the acoustic processing circuit 300 and can include a vibration generator 210. The vibration generator 210 can include a plurality of vibration structures 210A, 210B.

[0197] Referring to FIG. 14, the vibration generator 210 can include one first vibration structure 210A disposed in the first support region (SAP1) and one second vibration structure 210B disposed in the second support region (SPA2). One first vibration structure 210A can vibrate by the first vibration drive signal and can vibrate the first support region (SA1). One second vibration structure 210B can vibrate by the second vibration drive signal and can vibrate the second support region (SA2).

[0198] According to the embodiments of this specification, one first vibration structure 210A can vibrate by the first vibration drive signal and can vibrate the left ear of the user located in the first support region (SA1). For example, one first vibration structure 210A can vibrate by the first vibration drive signal and can vibrate the left ear of the user located in the first support region (SA1) and the surrounding area of the left ear.

[0199] According to the embodiments of this specification, one second vibration structure 210B can vibrate under the second vibration driving signal and vibrate the right ear of the user located in the second support area (SA2). For example, one second vibration structure 210B can vibrate under the second vibration driving signal and vibrate the right ear of the user located in the second support area (SA2) and the peripheral area of the right ear.

[0200] According to the embodiments of this specification, one first vibration structure 210A and one second vibration structure 210B can be symmetrically arranged with respect to the center line (CL), but are not limited thereto. For example, one first vibration structure 210A and one second vibration structure 210B can be arranged side by side along the first direction (or the lateral direction of the headrest) (X), but are not limited thereto. For example, one first vibration structure 210A and one second vibration structure 210B can be arranged on the same plane in the support area (SA), but are not limited thereto.

[0201] Referring to FIG. 15, the vibration generator 210 can include a plurality of first vibration structures 210A arranged in the first support area (SA1) and a plurality of second vibration structures 210B arranged in the second support area (SA2). The plurality of first vibration structures 210A can vibrate under the first vibration driving signal and vibrate the first support area (SA1). The plurality of second vibration structures 210B can vibrate under the second vibration driving signal and vibrate the second support area (SA2). For example, the vibration generator 210 can include two first vibration structures 210A and two second vibration structures 210B, but is not limited thereto. For example, the vibration generator 210 can include three or more first vibration structures 210A and can include three or more second vibration structures 210B. For example, the first vibration driving signal can be commonly supplied to the plurality of first vibration structures 210A, and the second vibration driving signal can be commonly supplied to the plurality of second vibration structures 210B.

[0202] According to the embodiments of this specification, a plurality of first vibration structures 210A vibrate under the first vibration drive signal and can vibrate the left ear of the user located in the first support area (SA1). For example, the plurality of first vibration structures 210A vibrate under the first vibration drive signal and can vibrate the left ear of the user located in the first support area (SA1) and the peripheral area of the left ear.

[0203] According to the embodiments of this specification, a plurality of second vibration structures 210B vibrate under the second vibration drive signal and can vibrate the right ear of the user located in the second support area (SA2). For example, the plurality of second vibration structures 210B vibrate under the second vibration drive signal and can vibrate the right ear of the user located in the second support area (SA2) and the peripheral area of the right ear.

[0204] According to the embodiments of this specification, a plurality of first vibration structures 210A can be arranged along the second direction (or the longitudinal direction of the headrest) (Y). For example, the plurality of first vibration structures 210A can be arranged along the first direction (X). For example, the plurality of first vibration structures 210A can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of second vibration structures 210B can be arranged along the second direction (Y). For example, the plurality of second vibration structures 210B can be arranged along the first direction (X). For example, the plurality of second vibration structures 210B can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of first vibration structures 210A and the plurality of second vibration structures 210B can be symmetrically arranged with respect to the center line (CL), but are not limited thereto.

[0205] According to the embodiments of this specification, the plurality of first vibration structures 210A can be arranged on the same plane in the first support region (SA1), but are not limited thereto. The plurality of second vibration structures 210B can be arranged on the same plane in the second support region (SA2), but are not limited thereto. For example, the plurality of first vibration structures 210A and the plurality of second vibration structures 210B can be arranged on the same plane in the support region (SA), but are not limited thereto.

[0206] According to the embodiments of this specification, the plurality of first vibration structures 210A can be arranged or tiled in the form of i×j on the same plane in the first support region (SA1). For example, the plurality of second vibration structures 210B can be arranged or tiled in the form of i×j on the same plane in the second support region (SA2). For example, i is the number of vibration structures arranged along the first direction (X) and is a natural number of 1 or more, and j is the number of vibration structures arranged along the second direction (Y) and can be a natural number of 2 or more that is the same as or different from i. For example, i is a natural number of 2 or more, and j can be a natural number of 1 or more that is the same as or different from i. For example, all the vibration structures 210A, 210B included in the vibration device 200 can be arranged or tiled in the form of i×j on the same plane in the support region (SA). For example, i is the number of vibration structures arranged along the first direction (X) and is a natural number of 2 or more, and j is the number of vibration structures arranged along the second direction (Y) and can be a natural number of 2 or more that is the same as or different from i.

[0207] Figs. 16 to 19 are diagrams showing a headrest of a vehicle according to other embodiments of this specification. Figs. 16 to 19 show a change in the configuration of the vibration device of the headrest of the vehicle in Fig. 10. Accordingly, hereinafter, duplicate descriptions of the remaining configurations except for the vibration device and the related configurations will be omitted or described briefly.

[0208] Vehicles according to other embodiments of this specification may further include the vibration generating device of FIG. 9. Referring to FIGS. 9 and 16 to 19, vehicles according to other embodiments of this specification may include a microphone device 100 and a vibration device 200 disposed on a headrest (H).

[0209] According to an embodiment of this specification, the microphone device 100 may include a first microphone 110 disposed in a first edge region (PA1) and a second microphone 120 disposed in a second edge region (PA2). For example, the first microphone 110 is disposed in the first edge region (PA1) and can receive the noise in the first edge region (PA1). For example, the first microphone 110 can receive the noise around the user's left ear. For example, the second microphone 120 is disposed in the second edge region (PA2) and can receive the noise in the second edge region (PA2). For example, the second microphone 120 can receive the noise around the user's right ear. The first microphone 110 and the second microphone 120 can convert the received noise into an electrical signal and provide the noise signal to the acoustic processing circuit 300.

[0210] The vibration device 200 can vibrate the first support region (SA1) and the second support region (SA2) by a vibration drive signal from the acoustic processing circuit 300 and can include a plurality of vibration generators 210. For example, the vibration device 200 can include a first vibration generator 210-1 disposed in the first support region (SA1) and a second vibration generator 210-2 disposed in the second support region (SA2). For example, the first vibration generator 210-1 can vibrate the first support region (SA1) by a first vibration drive signal, and the second vibration generator 210-2 can vibrate the second support region (SA2) by a second vibration drive signal. For example, the vibration device 200 can include one or more first vibration generators 210-1 and one or more second vibration generators 210-2. For example, the first vibration generator 210-1 can include one or more first vibration structures 210A, and the second vibration generator 210-2 can include one or more second vibration structures 210B.

[0211] Referring to FIG. 16, the vibration device 200 may include one first vibration generator 210-1 disposed in the first support region (SA1) and one second vibration generator 210-2 disposed in the second support region (SA2). One first vibration generator 210-1 can vibrate by the first vibration drive signal and vibrate the first support region (SA1). One second vibration generator 210-2 can vibrate by the second vibration drive signal and vibrate the second support region (SA2). One first vibration generator 210-1 may include one first vibration structure 210A disposed in the first support region (SA1), and one second vibration generator 210-2 may include one second vibration structure 210B disposed in the second support region (SA2).

[0212] According to the embodiments of the present specification, one first vibration structure 210A can vibrate by the first vibration drive signal and vibrate the first support region (SA1). For example, one first vibration structure 210A can vibrate the left ear of the user located in the first support region (SA1). For example, one first vibration structure 210A can vibrate the left ear of the user located in the first support region (SA1) and the peripheral region of the left ear.

[0213] According to the embodiments of the present specification, one second vibration structure 210B can vibrate by the second vibration drive signal and vibrate the second support region (SA2). For example, one second vibration structure 210B can vibrate the right ear of the user located in the second support region (SA2). For example, one second vibration structure 210B can vibrate the right ear of the user located in the second support region (SA2) and the peripheral region of the right ear.

[0214] According to the embodiments of this specification, one first oscillator 210-1 and one second oscillator 210-2 may be symmetrically arranged with respect to the center line (CL), but are not limited thereto. For example, one first oscillator 210-1 and one second oscillator 210-2 may be arranged side by side along the first direction (X), but are not limited thereto. For example, one first oscillator 210-1 and one second oscillator 210-2 may be arranged on the same plane in the support area (SA), but are not limited thereto.

[0215] According to the embodiments of this specification, one first vibrating structure 210A and one second vibrating structure 210B may be symmetrically arranged with respect to the center line (CL), but are not limited thereto. For example, one first vibrating structure 210A and one second vibrating structure 210B may be arranged side by side along the first direction (X), but are not limited thereto. For example, one first vibrating structure 210A and one second vibrating structure 210B may be arranged on the same plane in the support area (SA), but are not limited thereto.

[0216] Referring to FIG. 17, the vibration device 200 may include a plurality of first oscillators 210-1 arranged in the first support area (SA1) and a plurality of second oscillators 210-2 arranged in the second support area (SA2). For example, the plurality of first oscillators 210-1 can vibrate under the first vibration driving signal and vibrate the first support area (SA1). For example, the plurality of second oscillators 210-2 can vibrate under the second driving signal and vibrate the second support area (SA2).

[0217] According to the embodiments of this specification, the vibration device 200 can include, but is not limited to, two first vibration generators 210-1 and two second vibration generators 210-2. For example, the vibration device 200 can include three or more first vibration generators 210-1 and three or more second vibration generators 210-2. For example, the first vibration drive signal can be commonly supplied to a plurality of first vibration generators 210-1, and the second vibration drive signal can be commonly supplied to a plurality of second vibration generators 210-2.

[0218] According to the embodiments of this specification, each of the plurality of first vibration generators 210-1 can include one first vibration structure 210A disposed in the first support region (SA1), and each of the plurality of second vibration generators 210-2 can include one second vibration structure 210B disposed in the second support region (SA2). For example, the first vibration drive signal can be commonly supplied to the first vibration structures 210A of each of the plurality of first vibration generators 210-1, and the second vibration drive signal can be commonly supplied to the second vibration structures 210B of each of the plurality of second vibration generators 210-2.

[0219] According to the embodiments of this specification, the first vibration structures 210A of each of the plurality of first vibration generators 210-1 can vibrate by the first vibration drive signal and can vibrate the first support region (SA1). For example, the first vibration structures 210A of each of the plurality of first vibration generators 210-1 can vibrate the left ear of the user located in the first support region (SA1). For example, the first vibration structures 210A of each of the plurality of first vibration generators 210-1 can vibrate the left ear of the user located in the first support region (SA1) and the peripheral region of the left ear.

[0220] According to the embodiments of this specification, each second vibration structure 210B of the plurality of second vibration generators 210-2 can vibrate by a second vibration driving signal and vibrate the second support region (SA2). For example, each second vibration structure 210B of the plurality of second vibration generators 210-2 can vibrate the right ear of a user located in the second support region (SA2). For example, each second vibration structure 210B of the plurality of second vibration generators 210-2 can vibrate the right ear of a user located in the second support region (SA2) and the peripheral region of the right ear.

[0221] According to the embodiments of this specification, the plurality of first vibration generators 210-1 can be arranged along the second direction (Y). For example, the plurality of first vibration generators 210-1 can be arranged along the first direction (X). For example, the plurality of first vibration generators 210-1 can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of second vibration generators 210-2 can be arranged along the second direction (Y). For example, the plurality of second vibration generators 210-2 can be arranged along the first direction (X). For example, the plurality of second vibration generators 210-2 can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of first vibration generators 210-1 and the plurality of second vibration generators 210-2 can be symmetrically arranged with respect to the center line (CL), but are not limited thereto.

[0222] According to the embodiments of this specification, the plurality of first vibration generators 210-1 or the plurality of first vibration structures 210A can be arranged on the same plane in the first support region (SA1), but are not limited thereto. The plurality of second vibration generators 210-2 or the plurality of second vibration structures 210B can be arranged on the same plane in the second support region (SA2), but are not limited thereto. For example, the plurality of first vibration generators 210-1 and the plurality of second vibration generators 210-2 can be arranged on the same plane in the support region (SA), but are not limited thereto. For example, the plurality of first vibration structures 210A and the plurality of second vibration structures 210B can be arranged on the same plane in the support region (SA), but are not limited thereto.

[0223] According to the embodiments of the present specification, a plurality of first vibration generators 210-1 can be arranged in an i×j form or tiled on the same plane in the first support region (SA1). For example, a plurality of second vibration generators 210-2 can be arranged in an i×j form or tiled on the same plane in the second support region (SA2). For example, i is a natural number of 1 or more, which is the number of vibration generators arranged along the first direction (X), and j is a natural number of 2 or more, which is the number of vibration generators arranged along the second direction (Y) and can be the same as or different from i. For example, i is a natural number of 2 or more, and j can be a natural number of 1 or more, which is the same as or different from i. For example, all the vibration generators 210-1 and 210-2 included in the vibration device 200 can be arranged in an i×j form or tiled on the same plane in the support region (SA). For example, i is a natural number of 2 or more, which is the number of vibration structures arranged along the first direction (X), and j is a natural number of 2 or more, which is the same as or different from i, and is the number of vibration structures arranged along the second direction (Y).

[0224] Referring to FIG. 18, the vibration device 200 can include one first vibration generator 210-1 arranged in the first support region (SA1) and one second vibration generator 210-2 arranged in the second support region (SA2). For example, one first vibration generator 210-1 can vibrate by the first vibration driving signal and vibrate the first support region (SA1). For example, one second vibration generator 210-2 can vibrate by the second vibration driving signal and vibrate the second support region (SA2).

[0225] According to the embodiments of this specification, one first vibration generator 210-1 includes a plurality of first vibration structures 210A arranged in a first support area (SA1), and one second vibration generator 210-2 can include a plurality of second vibration structures 210B arranged in a second support area (SA2). For example, one first vibration generator 210-1 can include two first vibration structures 210A, and one second vibration generator 210-2 can include two second vibration structures 210B, but it is not limited thereto. For example, one first vibration generator 210-1 can include three or more first vibration structures 210A, and one second vibration generator 210-2 can include three or more second vibration structures 210B. For example, the first vibration driving signal can be commonly supplied to the plurality of first vibration structures 210A, and the second vibration driving signal can be commonly supplied to the plurality of second vibration structures 210B.

[0226] According to the embodiments of this specification, each of the plurality of first vibration structures 210A can vibrate by the first vibration driving signal and vibrate the first support area (SA1). For example, each of the plurality of first vibration structures 210A can vibrate the left ear of the user located in the first support area (SA1). For example, each of the plurality of first vibration structures 210A can vibrate the left ear of the user and the peripheral area of the left ear located in the first support area (SA1).

[0227] According to the embodiments of this specification, each of the plurality of second vibration structures 210B can vibrate by the second vibration driving signal and vibrate the second support area (SA2). For example, each of the plurality of second vibration structures 210B can vibrate the right ear of the user located in the second support area (SA2). For example, each of the plurality of second vibration structures 210B can vibrate the right ear of the user and the peripheral area of the right ear located in the second support area (SA2).

[0228] According to the embodiments of this specification, a plurality of first vibrating structures 210A can be arranged along the second direction (Y). For example, the plurality of first vibrating structures 210A can be arranged along the first direction (X). For example, the plurality of first vibrating structures 210A can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of second vibrating structures 210B can be arranged along the second direction (Y). For example, the plurality of second vibrating structures 210B can be arranged along the first direction (X). For example, the plurality of second vibrating structures 210B can be arranged along the first direction (X) and the second direction (Y).

[0229] According to the embodiments of this specification, one first vibration generator 210-1 and one second vibration generator 210-2 can be symmetrically arranged with respect to the center line (CL), but are not limited thereto. For example, the plurality of first vibrating structures 210A can be arranged on the same plane in the first support region (SA1), but are not limited thereto. The plurality of second vibrating structures 210B can be arranged on the same plane in the second support region (SA2), but are not limited thereto. For example, the plurality of first vibrating structures 210A and the plurality of second vibrating structures 210B can be arranged on the same plane in the support region (SA), but are not limited thereto.

[0230] According to the embodiments of this specification, a plurality of first vibrating structures 210A can be arranged in an i×j form or tiled on the same plane in the first support region (SA1). For example, a plurality of second vibrating structures 210B can be arranged in an i×j form or tiled on the same plane in the second support region (SA2). For example, i is a natural number of 1 or more, which is the number of vibrating structures arranged along the first direction (X), and j can be a natural number of 2 or more, which is the number of vibrating structures arranged along the second direction (Y) and is the same as or different from i. For example, i is a natural number of 2 or more, and j can be a natural number of 1 or more, which is the same as or different from i. For example, all the vibrating structures 210A and 210B included in the vibrating device 200 can be arranged in an i×j form or tiled on the same plane in the support region (SA). For example, i is a natural number of 2 or more, which is the number of vibrating structures arranged along the first direction (X), and j can be a natural number of 2 or more, which is the same as or different from i, and is the number of vibrating structures arranged along the second direction (Y).

[0231] Referring to FIG. 19, the vibrating device 200 can include a plurality of first vibration generators 210-1 arranged in the first support region (SA1) and a plurality of second vibration generators 210-2 arranged in the second support region (SA2). For example, the plurality of first vibration generators 210-1 can vibrate under the first vibration driving signal and vibrate the first support region (SA1). For example, the plurality of second vibration generators 210-2 can vibrate under the second driving signal and vibrate the second support region (SA2).

[0232] According to the embodiments of this specification, the vibrating device 200 can include two first vibration generators 210-1 and two second vibration generators 210-2, but is not limited thereto. For example, the vibrating device 200 can include three or more first vibration generators 210-1 and can include three or more second vibration generators 210-2. For example, the first vibration driving signal can be commonly supplied to the plurality of first vibration generators 210-1, and the second vibration driving signal can be commonly supplied to the plurality of second vibration generators 210-2.

[0233] According to the embodiments of the present specification, each of the plurality of first vibration generators 210-1 includes a plurality of first vibration structures 210A disposed in the first support region (SA1), and each of the plurality of second vibration generators 210-2 can include a plurality of second vibration structures 210B disposed in the second support region (SA2). For example, each of the plurality of first vibration generators 210-1 can include two first vibration structures 210A, and each of the plurality of second vibration generators 210-2 can include two second vibration structures 210B, but is not limited thereto. For example, the plurality of first vibration generators 210-1 can include three or more first vibration structures 210A. For example, the plurality of second vibration generators 210-2 can include three or more second vibration structures 210B. For example, the first vibration driving signal can be commonly supplied to the plurality of first vibration structures 210A of each of the plurality of first vibration generators 210-1, and the second vibration driving signal can be commonly supplied to the plurality of second vibration structures 210B of each of the plurality of second vibration generators 210-2.

[0234] According to the embodiments of the present specification, each of the plurality of first vibration structures 210A of each of the plurality of first vibration generators 210-1 can vibrate by the first vibration driving signal and vibrate the first support region (SA1). For example, each of the plurality of first vibration structures 210A of each of the plurality of first vibration generators 210-1 can vibrate the left ear of the user located in the first support region (SA1). For example, each of the plurality of first vibration structures 210A of each of the plurality of first vibration generators 210-1 can vibrate the left ear of the user located in the first support region (SA1) and the peripheral region of the left ear.

[0235] According to the embodiments of this specification, each of the plurality of second vibration structures 210B of each of the plurality of second vibration generators 210-2 can vibrate by a second vibration driving signal and vibrate the second support region (SA2). For example, each of the plurality of second vibration structures 210B of each of the plurality of second vibration generators 210-2 can vibrate the right ear of a user located in the second support region (SA2). For example, each of the plurality of second vibration structures 210B of each of the plurality of second vibration generators 210-2 can vibrate the right ear of a user located in the second support region (SA2) and the peripheral region of the right ear.

[0236] According to the embodiments of this specification, the plurality of first vibration generators 210-1 can be arranged along the second direction (Y). For example, the plurality of first vibration generators 210-1 can be arranged along the first direction (X). For example, the plurality of first vibration generators 210-1 can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of second vibration generators 210-2 can be arranged along the second direction (Y). For example, the plurality of second vibration generators 210-2 can be arranged along the first direction (X). For example, the plurality of second vibration generators 210-2 can be arranged along the first direction (X) and the second direction (Y). For example, the plurality of first vibration generators 210-1 and the plurality of second vibration generators 210-2 can be symmetrically arranged with respect to the center line (CL), but are not limited thereto.

[0237] According to the embodiments of this specification, the plurality of first vibration generators 210-1 can be arranged on the same plane in the first support region (SA1), but are not limited thereto. The plurality of second vibration generators 210-2 can be arranged on the same plane in the second support region (SA2), but are not limited thereto. For example, the plurality of first vibration generators 210-1 and the plurality of second vibration generators 210-2 can be arranged on the same plane in the support region (SA), but are not limited thereto.

[0238] According to the embodiments of the present specification, a plurality of first vibration generators 210-1 can be arranged in an i×j form or tiled on the same plane in the first support region (SA1). For example, a plurality of second vibration generators 210-2 can be arranged in an i×j form or tiled on the same plane in the second support region (SA2). For example, i is a natural number of 1 or more, which is the number of vibration generators arranged along the first direction (X), and j can be a natural number of 2 or more, which is the same as or different from i, and is the number of vibration generators arranged along the second direction (Y). For example, i can be a natural number of 2 or more, and j can be a natural number of 1 or more, which is the same as or different from i. For example, all the vibration generators 210-1 and 210-2 included in the vibration device 200 can be arranged in an i×j form or tiled on the same plane in the support region (SA). For example, i is a natural number of 4 or more, which is the number of vibration generators arranged along the first direction (X), and j can be a natural number of 1 or more, which is the same as or different from i, and is the number of vibration structures arranged along the second direction (Y).

[0239] According to the embodiments of the present specification, each of the plurality of first vibration structures 210A of the plurality of first vibration generators 210-1 can be arranged along the second direction (Y). For example, each of the plurality of first vibration structures 210A of the plurality of first vibration generators 210-1 can be arranged along the first direction (X). For example, each of the plurality of first vibration structures 210A of the plurality of first vibration generators 210-1 can be arranged along the first direction (X) and the second direction (Y). For example, each of the plurality of second vibration structures 210B of the plurality of second vibration generators 210-2 can be arranged along the second direction (Y). For example, each of the plurality of second vibration structures 210B of the plurality of second vibration generators 210-2 can be arranged along the first direction (X). For example, each of the plurality of second vibration structures 210B of the plurality of second vibration generators 210-2 can be arranged along the first direction (X) and the second direction (Y).

[0240] According to the embodiments of this specification, the plurality of first vibration structures 210A of each of the plurality of first vibration generators 210-1 can be arranged on the same plane in the first support region (SA1), but is not limited thereto. The plurality of second vibration structures 210B of each of the plurality of second vibration generators 210-2 can be arranged on the same plane in the second support region (SA2), but is not limited thereto. For example, the plurality of first vibration structures 210A of each of the plurality of first vibration generators 210-1 and the plurality of second vibration structures 210B of each of the plurality of second vibration generators 210-2 can be arranged on the same plane in the support region (SA), but is not limited thereto.

[0241] According to the embodiments of this specification, the plurality of first vibration structures 210A can be arranged in the form of i×j or tiled on the same plane in the first support region (SA1). For example, the plurality of second vibration structures 210B can be arranged in the form of i×j or tiled on the same plane in the second support region (SA2). For example, i is a natural number of 1 or more, which is the number of vibration structures arranged along the first direction (X), and j is a natural number of 2 or more, which is the same as or different from i, and is the number of vibration structures arranged along the second direction (Y). For example, i is a natural number of 2 or more, and j can be a natural number of 1 or more, which is the same as or different from i. For example, all the vibration structures 210A and 210B included in the vibration device 200 can be arranged in the form of i×j or tiled on the same plane in the support region (SA). For example, i is a natural number of 4 or more, which is the number of vibration structures arranged along the first direction (X), and j is a natural number of 2 or more, which is the same as or different from i, and is the number of vibration structures arranged along the second direction (Y).

[0242] The vibration generator according to the embodiments of this specification and a vehicle including the same can be described as follows.

[0243] The vibration generating device according to the embodiments of this specification is arranged on an object including a plurality of regions, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device that is arranged on the object and vibrates according to the vibration drive signal to vibrate the object.

[0244] According to some embodiments of this specification, the object may be configured to vibrate to generate sound corresponding to the sound source signal.

[0245] According to some embodiments of this specification, the sound generated by the object may be provided to the user through bone conduction.

[0246] According to some embodiments of this specification, the acoustic processing circuit may include an input unit that receives the sound source signal and the noise signal, a signal processing unit that receives the noise signal and generates a noise cancellation signal based on the noise signal, and a drive signal generation unit that generates a vibration drive signal based on the sound source signal and the noise cancellation signal.

[0247] According to some embodiments of this specification, the microphone device further receives the first noise around the first region among the plurality of regions and the second noise around the second region among the plurality of regions, and / or the acoustic processing circuit further generates a first noise cancellation signal having an opposite phase to the first noise signal corresponding to the first noise, and further generates a second noise cancellation signal having an opposite phase to the second noise signal corresponding to the second noise.

[0248] According to some embodiments of this specification, the acoustic processing circuit may further generate a vibration drive signal by combining the sound source signal, the first noise cancellation signal, and the second noise cancellation signal.

[0249] According to some embodiments of this specification, the acoustic processing circuit can combine the sound source signal and the first noise cancellation signal to further generate a first vibration driving signal, and combine the sound source signal and the second noise cancellation signal to further generate a second vibration driving signal.

[0250] According to some embodiments of this specification, the vibration device includes a first oscillator disposed over the third region among the plurality of regions, or the fourth region among the plurality of regions, or both the third region and the fourth region, and the acoustic processing circuit can further supply a vibration driving signal to the first oscillator.

[0251] According to some embodiments of this specification, the first oscillator includes at least one or more vibration structures, and the at least one or more vibration structures can be disposed over the third region, the fourth region, or both the third region and the fourth region.

[0252] According to some embodiments of this specification, the first oscillator can include a first portion of an inorganic material and a second portion of an organic material disposed between the first portions.

[0253] According to some embodiments of this specification, the first portion and the second portion can be alternately and repeatedly arranged along a first direction and / or a second direction intersecting the first direction.

[0254] According to some embodiments of this specification, the width of the second portion can gradually decrease from the middle portion of the vibration device towards both sides.

[0255] According to some embodiments of this specification, the first portion can have a linear, square, circular, or triangular shape.

[0256] According to some embodiments of this specification, one oscillator includes at least one or more vibration structures, and / or at least one or more vibration structures can include at least one or more first vibration structures disposed in a third region and at least one or more second vibration structures disposed in a fourth region.

[0257] According to some embodiments of this specification, each of at least one or more first vibration structures and at least one or more second vibration structures can include a first portion of an inorganic material and a second portion of an organic material disposed between the first portions.

[0258] According to some embodiments of this specification, a vibration device includes at least one or more first oscillators disposed in a third region among a plurality of regions and at least one or more second oscillators disposed in a fourth region among the plurality of regions, and an acoustic processing circuit can further supply a first vibration driving signal to at least one or more first oscillators and supply a second vibration driving signal to at least one or more second oscillators.

[0259] According to some embodiments of this specification, at least one or more first oscillators can include at least one or more first vibration structures, and at least one or more second oscillators can include at least one or more second vibration structures.

[0260] According to some embodiments of this specification, each of at least one or more first vibration structures and at least one or more second vibration structures can include a first portion of an inorganic material and a second portion of an organic material disposed between the first portions.

[0261] According to some embodiments of this specification, the object can be at least one or more of a vehicle seat, a train seat, a massage chair, an office chair, and a head protection device.

[0262] The vibration generating device according to the embodiments of this specification is arranged on an object including a first region, a second region, a third region, and a fourth region, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device including at least one vibration generator that vibrates according to the vibration drive signal and vibrates at least one of the third region and the fourth region.

[0263] According to some embodiments of this specification, the acoustic processing circuit can include an input unit that receives a sound source signal and a noise signal, a signal processing unit that receives the noise signal and generates a noise cancellation signal based on the noise signal, and a drive signal generation unit that generates a vibration drive signal based on the sound source signal and the noise cancellation signal.

[0264] According to some embodiments of this specification, at least one vibration generator can include at least one vibration structure.

[0265] According to some embodiments of this specification, at least one vibration generator includes one vibration generator arranged across the third region, the fourth region, or the third region and the fourth region, and the acoustic processing circuit can further supply a vibration drive signal to the one vibration generator.

[0266] According to some embodiments of this specification, the acoustic processing circuit can further supply a vibration drive signal based on the sound source signal, a first noise cancellation signal having an opposite phase to the first noise around the first region, and a second noise cancellation signal having an opposite phase to the second noise around the second region.

[0267] According to some embodiments of this specification, one vibration generator can include one vibration structure arranged across the third region, the fourth region, or the third region and the fourth region.

[0268] According to some embodiments of the present specification, one oscillator can include at least one or more first vibration structures disposed in the third region and at least one or more second vibration structures disposed in the fourth region.

[0269] According to some embodiments of the present specification, at least one or more oscillators include at least one or more first oscillators disposed in the third region and at least one or more second oscillators disposed in the fourth region, and the acoustic processing circuit can further supply a first vibration driving signal to at least one or more first oscillators and a second vibration driving signal to at least one or more second oscillators.

[0270] According to some embodiments of the present specification, the acoustic processing circuit can further supply a first vibration driving signal based on a sound source signal and a first noise cancellation signal having an opposite phase to the first noise around the first region, and can further supply a second vibration driving signal based on the sound source signal and a second noise cancellation signal having an opposite phase to the second noise around the second region.

[0271] According to some embodiments of the present specification, at least one or more first oscillators can include at least one or more first vibration structures, and at least one or more second oscillators can include at least one or more second vibration structures.

[0272] According to some embodiments of the present specification, at least one or more vibration structures can include a first portion of an inorganic substance and a second portion of an organic substance disposed between the first portions.

[0273] According to some embodiments of the present specification, the first portion and the second portion can be alternately and repeatedly arranged along the first direction and / or a second direction intersecting the first direction.

[0274] According to some embodiments of the present specification, the width of the second portion can gradually decrease from the middle portion of the vibration device toward both sides.

[0275] According to some embodiments of this specification, the first part can have a linear, square, circular or triangular shape.

[0276] According to some embodiments of this specification, the first part can have piezoelectric properties, and the second part can have soft properties.

[0277] According to some embodiments of this specification, the object can be at least one or more of a vehicle seat, a train seat, a massage chair, an office chair, and a head protection device.

[0278] The vehicle according to the embodiments of this specification includes a seat with a headrest including a plurality of regions, and a vibration generating device disposed on the headrest. The vibration generating device is disposed on an object including a plurality of regions, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an inverse phase of the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device disposed on the object and vibrating by the vibration drive signal to vibrate the object. The headrest can be the object of the vibration generating device.

[0279] According to some embodiments of this specification, the plurality of regions can include a first support region that is the left region among the central regions of the headrest, a second support region that is the right region among the central regions of the headrest, a first edge region located on the left side of the first support region, and a second edge region located on the right side of the second support region.

[0280] According to some embodiments of this specification, the vibration device can vibrate by the vibration drive signal to vibrate at least one or more regions among the first support region and the second support region.

[0281] The vehicle according to the embodiments of the present specification includes a seat with a headrest including first to fourth regions, and a vibration generating device disposed on the headrest. The vibration generating device is disposed on an object including the first region, the second region, the third region, and the fourth region, and includes a microphone device that receives noise around the object, an acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an inverse phase of the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, and a vibration device including at least one or more vibration generators that vibrate by the vibration drive signal and vibrate at least one or more regions of the third region and the fourth region. The headrest may be the object of the vibration generating device.

[0282] According to some embodiments of the present specification, one or more of the third region and the fourth region may be configured to vibrate to generate sound corresponding to the sound source signal.

[0283] According to some embodiments of the present specification, the sound generated by the third region and the fourth region may be provided to the user through bone conduction.

[0284] According to some embodiments of the present specification, the first region may be the left edge region of the headrest, the second region may be the right edge region of the headrest, the third region may be the left central region of the headrest, and the fourth region may be the right central region of the headrest.

[0285] The embodiments of this specification have been described in more detail with reference to the attached drawings above. However, this specification is not necessarily limited to such embodiments, and various modifications can be made without departing from the technical idea of this specification. Therefore, the embodiments disclosed in this specification are for the purpose of explanation rather than for limiting the technical idea of this specification, and the scope of the technical idea of this specification is not limited by such embodiments. Therefore, it must be understood that the embodiments described above are exemplary and not restrictive in all respects. The protection scope of this specification must be interpreted according to the scope of the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of this specification.

Explanation of Reference Numerals

[0286] 100: Microphone device 200: Vibration device 210, 210-1, 210-2: Vibration generator 210A, 210B: Vibration structure 300: Acoustic processing circuit 310: Input section 320: Signal processing section 330: Drive signal generation section 400: Sound source providing system

Claims

1. A microphone device disposed on an object including a plurality of regions, for receiving noise around the object; An acoustic processing circuit for receiving a sound source signal and a noise signal corresponding to the noise, generating a noise cancellation signal having an inverted phase of the noise signal, and generating a vibration drive signal based on the sound source signal and the noise cancellation signal; And a vibration device disposed on the object, for vibrating by the vibration drive signal to vibrate the object, The object includes at least one of a vehicle seat, a train seat, a massage chair, a desk chair, and a head protection device; The vibration device includes one vibration generator, a first protection member disposed on a first surface of the vibration generator, and a second protection member disposed on a second surface of the vibration generator; The one vibration generator includes a vibration part, a first electrode layer disposed on a first surface of the vibration part, and a second electrode layer disposed on a second surface of the vibration part; The vibration device is A first power supply line disposed on the first electrode layer of the one vibration generator and overlapping the vibration part in a plan view, and A second power supply line disposed on the second electrode layer of the one vibration generator, overlapping the vibration part in a plan view and not overlapping the first power supply line; The first and second power supply lines are a vibration generating device configured to supply the vibration drive signal to the one vibration generator.

2. The acoustic processing circuit is An input part for receiving the sound source signal and the noise signal; A signal processing part for receiving the noise signal and generating the noise cancellation signal based on the noise signal; And a drive signal generation part for generating the vibration drive signal based on the sound source signal and the noise cancellation signal, according to the vibration generating device described in Claim 1.

3. The microphone device further receives first noise around a first region among the plurality of regions and second noise around a second region among the plurality of regions, and / or The vibration generating device according to claim 1, wherein the acoustic processing circuit further generates a first noise removal signal having an inverse phase of a first noise signal corresponding to the first noise, and further generates a second noise removal signal having an inverse phase of a second noise signal corresponding to the second noise.

4. The vibration generating device according to claim 3, wherein the acoustic processing circuit is further configured to combine the sound source signal, the first noise removal signal, and the second noise removal signal to generate the vibration drive signal.

5. The vibration generating device according to claim 3, wherein the acoustic processing circuit is further configured to combine the sound source signal and the first noise removal signal to generate a first vibration drive signal, and combine the sound source signal and the second noise removal signal to generate a second vibration drive signal.

6. The vibration device includes one vibration generator disposed over a third region among the plurality of regions, or a fourth region among the plurality of regions, or the third region and the fourth region, The vibration generating device according to claim 4, wherein the acoustic processing circuit supplies the vibration drive signal to the one vibration generator.

7. The one vibration generator includes at least one vibration structure, The vibration generating device according to claim 6, wherein the at least one vibration structure is disposed over the third region, the fourth region, or the third region and the fourth region.

8. The vibration generating device according to claim 7, wherein the one vibration generator includes a first portion including an inorganic substance and a second portion including an organic substance disposed between adjacent first portions.

9. The one vibration generator includes at least one vibration structure, and / or The vibration generating device according to claim 6, wherein the at least one vibrating structure includes at least one first vibrating structure disposed in the third region and at least one second vibrating structure disposed in the fourth region.

10. The vibration generating device according to claim 9, wherein each of the at least one first vibrating structure and the at least one second vibrating structure includes a first portion containing an inorganic substance and a second portion containing an organic substance disposed between adjacent first portions.

11. The vibration device includes at least one first vibration generator disposed in a third region of the plurality of regions and at least one second vibration generator disposed in a fourth region of the plurality of regions, The vibration generating device according to claim 5, wherein the acoustic processing circuit further supplies the first vibration driving signal to the at least one first vibration generator and further supplies the second vibration driving signal to the at least one second vibration generator.

12. The vibration generating device according to claim 11, wherein the at least one first vibration generator includes at least one first vibrating structure, and the at least one second vibration generator includes at least one second vibrating structure.

13. The vibration generating device according to claim 12, wherein each of the at least one first vibrating structure and the at least one second vibrating structure includes a first portion of an inorganic substance and a second portion of an organic substance disposed between adjacent first portions.

14. The noise is canceled and removed by the vibration of the one vibration generator generated based on the noise removal signal, The sound source generated by the vibration of the one vibration generator based on the sound source signal is received by the user via bone conduction. The vibration generating device according to claim 1.

15. A microphone device disposed on an object including a first region, a second region, a third region, and a fourth region, and receiving noise around the object; An acoustic processing circuit that receives a sound source signal and a noise signal corresponding to the noise, generates a noise cancellation signal having an opposite phase to the noise signal, and generates a vibration drive signal based on the sound source signal and the noise cancellation signal, A vibration device including at least one vibration generator that vibrates by the vibration drive signal and vibrates at least one of the third region and the fourth region, The object includes one or more of a vehicle seat, a train seat, a massage chair, an office chair, and a head protection device, The at least one vibration generator includes a first protection member disposed on a first surface of the at least one vibration generator and a second protection member disposed on a second surface of the at least one vibration generator, The at least one vibration generator includes a vibration part, a first electrode layer disposed on a first surface of the vibration part, and a second electrode layer disposed on a second surface of the vibration part, The at least one vibration generator, A first power supply line disposed on the first electrode layer of the at least one vibration generator and overlapping the vibration part in a plan view, and A second power supply line disposed on the second electrode layer of the at least one vibration generator, overlapping the vibration part in a plan view and not overlapping the first power supply line, The first and second power supply lines are a vibration generating device configured to supply the vibration drive signal to the at least one vibration generator.

16. The acoustic processing circuit, An input unit that receives the sound source signal and the noise signal, A signal processing unit that receives the noise signal and generates the noise cancellation signal based on the noise signal, The vibration generating device according to claim 15, further including a drive signal generating unit that generates the vibration drive signal based on the sound source signal and the noise cancellation signal.

17. The at least one vibration generator includes at least one vibration structure, and the vibration generating device according to claim 15.

18. The at least one vibration generator includes one vibration generator disposed across the third region, the fourth region, or the third region and the fourth region, The acoustic processing circuit further supplies the vibration drive signal to the one vibration generator, and the vibration generating device according to claim 15.

19. The acoustic processing circuit further supplies the vibration drive signal based on the sound source signal, a first noise removal signal having an inverse phase of a first noise around the first region, and a second noise removal signal having an inverse phase of a second noise around the second region, and the vibration generating device according to claim 18.

20. The one vibration generator includes one vibration structure disposed across the third region, the fourth region, or the third region and the fourth region, and the vibration generating device according to claim 18.

21. The one vibration generator includes at least one first vibration structure disposed in the third region and at least one second vibration structure disposed in the fourth region, and the vibration generating device according to claim 18.

22. The at least one vibration generator includes at least one first vibration generator disposed in the third region and at least one second vibration generator disposed in the fourth region, The acoustic processing circuit further supplies a first vibration drive signal to the at least one first vibration generator and further supplies a second vibration drive signal to the at least one second vibration generator, and the vibration generating device according to claim 15.

23. The acoustic processing circuit further supplies the first vibration drive signal based on the sound source signal and a first noise cancellation signal having an opposite phase to the first noise around the first region, and further supplies the second vibration drive signal based on the sound source signal and a second noise cancellation signal having an opposite phase to the second noise around the second region. The vibration generating device according to claim 22.

24. The at least one first vibration generator includes at least one first vibration structure, and the at least one second vibration generator includes at least one second vibration structure. The vibration generating device according to claim 22.

25. The at least one vibration structure includes a first portion containing an inorganic substance and a second portion of an organic substance disposed between adjacent first portions. The first portion has piezoelectric characteristics. The second portion has soft characteristics. The vibration generating device according to claim 17.

26. The noise is canceled and removed by the vibration of the one vibration generator generated based on the noise cancellation signal. The sound source generated by the vibration of the one vibration generator based on the sound source signal is received by the user via bone conduction. The vibration generating device according to claim 15.

27. A seat provided with a headrest including a plurality of regions, And a vibration generating device disposed on the headrest. The vibration generating device includes any one of the vibration generating devices of claims 1 to 14. The headrest is the object of the vibration generating device, a vehicle.

28. The plurality of regions are A first support region which is a region on the left side among the central regions of the headrest, A second support region which is a region on the right side among the central regions of the headrest, A first edge region located on the left side of the first support region, and The vehicle according to claim 27, including a second edge region located on the right side of the second support region.

29. The vehicle according to claim 28, wherein the vibration device vibrates based on the vibration drive signal to vibrate at least one of the first support region and the second support region.

30. A seat including a headrest including first to fourth regions, and a vibration generator disposed on the headrest, wherein the vibration generator includes any one of the vibration generators of claims 15 to 26, and the headrest is the object of the vibration generator, the vehicle.

31. The first region is a left edge region of the headrest, the second region is a right edge region of the headrest, the third region is a left central region of the headrest, the fourth region is a right central region of the headrest, the vehicle according to claim 30.

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