Device

Abstract

To provide an apparatus which can enhance a sound characteristic and a sound pressure characteristic of a low-pitched sound band generated by vibration of a passive vibration member.SOLUTION: The apparatus includes: a passive vibration member; a vibration device including a plurality of active vibration members coupled to a rear surface of the passive vibration member, the plurality of active vibration members being arranged along one or more of a first direction and a second direction intersecting with the first direction; and a supporting member which covers the vibration device and supports the rear surface of the passive vibration member. A driving signal applied to at least one of the active vibration members differs from a driving signal applied to the others of the active vibration members.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] TECHNICAL FIELD This specification relates to devices, and more particularly to devices capable of outputting sound. [Background technology]

[0002] The device includes a separate speaker or acoustic device to provide sound. The acoustic device has a vibration system that converts input electrical signals into physical vibrations. Piezoelectric speakers made of piezoelectric elements such as ferroelectric ceramics have the advantages of being lightweight and consuming low power, and are therefore used in a variety of applications.

[0003] The piezoelectric elements used in piezoelectric speakers have high rigidity, which increases the minimum resonance frequency, making them prone to insufficient sound pressure in the low-frequency range. Therefore, piezoelectric speakers have the technical problem of insufficient sound pressure in the low-frequency range, and as a result, devices that include piezoelectric speakers have the technical problem of insufficient sound pressure in the low-frequency range. Summary of the Invention [Problem to be solved by the invention]

[0004] The inventor of the present specification recognized the above-mentioned technical problems and conducted several experiments to realize a vibration device that can improve the sound pressure in the low frequency range. Through several experiments, the inventor invented an apparatus including a new vibration device that can improve the sound pressure in the low frequency range.

[0005] The technical problem to be solved by this specification is to provide a device that can improve the acoustic characteristics and sound pressure characteristics of the low frequency band generated by the vibration of a passive vibration member.

[0006] The problems to be solved by this specification are not limited to those described above, and other problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the technical idea of ​​this specification belongs from the following description. [Means for solving the problem]

[0007] An apparatus according to an embodiment of the present specification includes a vibration device including a passive vibration member and a plurality of active vibration members connected to a back surface of the passive vibration member along at least one of a first direction and a second direction intersecting the first direction, and a support member on the back surface of the passive vibration member, wherein a drive signal applied to at least one of the plurality of active vibration members is different from a drive signal applied to the remaining active vibration members of the plurality of active vibration members.

[0008] An apparatus according to an embodiment of the present specification includes a vibration device including a passive vibration member, a vibration transmission member arranged on the rear surface of the passive vibration member and connected to the passive vibration member, a plurality of active vibration members connected to the vibration transmission member along at least one or more directions among a first direction and a second direction intersecting the first direction, and a support member on the rear surface of the passive vibration member, wherein a drive signal applied to at least one or more of the plurality of active vibration members is different from a drive signal applied to the remaining active vibration members among the plurality of active vibration members.

[0009] Specific matters relating to various examples of this specification other than the means for solving the above-mentioned problems are included in the following description and drawings. [Effects of the Invention]

[0010] According to the embodiments of the present specification, it is possible to provide a device that can improve the acoustic characteristics and sound pressure characteristics in the low frequency range generated by the vibration of a passive vibration member.

[0011] The above-mentioned problems to be solved, means for solving the problems, and effects do not specify essential features of the claims, and therefore the scope of the claims is not limited by the matters described in the contents of the invention. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 illustrates an apparatus according to an embodiment of the present disclosure. [Figure 2]2 is a cross-sectional view taken along line AA' shown in FIG. [Figure 3] FIG. 2 is a perspective view showing the vibration device according to the embodiment of the present specification shown in FIG. [Figure 4] FIG. 1 is a block diagram showing a vibration drive circuit according to a first embodiment of the present specification. [Figure 5] FIG. 2 is a waveform diagram illustrating a drive signal for driving an active oscillator member according to an embodiment of the present disclosure. [Figure 6] FIG. 10 is a block diagram showing a vibration drive circuit according to a second embodiment of the present specification. [Figure 7] FIG. 10 is a block diagram showing a vibration drive circuit according to a third embodiment of the present specification. [Figure 8] 2 is another cross-sectional view taken along the line AA' shown in FIG. 1. FIG. [Figure 9] 9 is a diagram showing the vibration device shown in FIG. 8. [Figure 10] 2 is another cross-sectional view taken along the line AA' shown in FIG. 1. FIG. [Figure 11] 11 is a diagram showing the vibration device shown in FIG. 10. FIG. [Figure 12A] 12A and 12B are diagrams showing modified examples of the vibration transmitting member shown in FIGS. 10 and 11. [Figure 12B] 12A and 12B are diagrams showing another modified embodiment of the vibration transmitting member shown in FIGS. 10 and 11. [Figure 13A] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13B] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13C] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13D] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13E] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13F] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13G]10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13H] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13I] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13J] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13K] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13L] 10A-10C illustrate examples of drive signals for vibration devices according to embodiments of the present disclosure. [Figure 13M] FIG. 10 is a diagram showing a driving signal of a vibration device according to an experimental example. [Figure 14A] 10A and 10B are diagrams illustrating examples of drive signals for vibration devices according to other embodiments of the present disclosure. [Figure 14B] 10A and 10B are diagrams illustrating examples of drive signals for vibration devices according to other embodiments of the present disclosure. [Figure 14C] 10A and 10B are diagrams illustrating examples of drive signals for vibration devices according to other embodiments of the present disclosure. [Figure 14D] 10A and 10B are diagrams illustrating examples of drive signals for vibration devices according to other embodiments of the present disclosure. [Figure 14E] 10A and 10B are diagrams illustrating examples of drive signals for vibration devices according to other embodiments of the present disclosure. [Figure 14F] 10A and 10B are diagrams illustrating examples of drive signals for vibration devices according to other embodiments of the present disclosure. [Figure 15] FIG. 10 illustrates a circular arrangement of multiple active vibration members according to another embodiment of the present disclosure. [Figure 16] FIG. 10 illustrates a circular arrangement of multiple active vibration members according to another embodiment of the present disclosure. [Figure 17] 13A to 13C are graphs showing acoustic output characteristics according to the drive signals according to the first to third examples of the present specification. [Figure 18]13B is a graph showing acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to the first example of the present specification shown in FIG. 13A. [Figure 19] 13B is a graph showing acoustic output characteristics according to the drive signals according to the first, fourth, and fifth examples of the present specification shown in FIGS. 13A, 13D, and 13E. [Figure 20] 13D is a graph showing acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to the fourth example of the present specification. [Figure 21] 13B is a graph showing acoustic output characteristics according to the drive signals according to the first, sixth, and seventh examples of the present specification shown in FIGS. 13A, 13F, and 13G. [Figure 22] 13F is a graph showing acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to the sixth example of the present specification. [Figure 23] 13A, 13G, and 13I are graphs showing acoustic output characteristics according to the drive signals according to the first, seventh, and ninth examples of the present specification. [Figure 24] 13I is a graph showing acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to the ninth example of the present specification. [Figure 25] 13B is a graph showing acoustic output characteristics according to the distance between a plurality of active vibration members when the vibration device is driven by the drive signal according to the first embodiment of the present specification shown in FIG. 13A. [Figure 26] 13D is a graph showing acoustic output characteristics according to the distance between a plurality of active vibration members when the vibration device is driven by the drive signal according to the fourth embodiment of the present specification. [Figure 27] 13B is a graph showing acoustic output characteristics depending on the spacing between a plurality of active vibration members when the vibration device is driven by the drive signal according to the seventh embodiment of the present specification shown in FIG. 13G. [Figure 28]13B is a graph showing acoustic output characteristics according to the attachment method between each of a plurality of active vibration members and a passive vibration member when the vibration device is driven by the drive signal according to the first embodiment of the present specification shown in FIG. 13A. [Figure 29] 13B is a graph showing acoustic output characteristics according to the attachment method between each of a plurality of active vibration members and a passive vibration member when the vibration device is driven by the drive signal according to the seventh embodiment of the present specification shown in FIG. 13G. [Figure 30] 13B is a graph showing acoustic output characteristics according to the attachment method between each of a plurality of active vibration members and a passive vibration member when the vibration device is driven by the driving signal of the experimental example shown in FIG. 13M. DETAILED DESCRIPTION OF THE INVENTION

[0013] The advantages and features of the present invention, as well as methods for achieving them, will become clearer with reference to the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be realized in various different forms. The embodiments are provided solely to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The present invention is defined solely by the scope of the claims.

[0014] The shapes, sizes, ratios, angles, numbers, etc. shown in the drawings for the purpose of explaining the embodiments of this specification are merely examples, and the specification is not limited to the details shown in the drawings. The same reference symbols refer to the same components throughout this specification. Furthermore, in describing this specification, if a detailed description of related prior art is deemed to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When terms such as "comprise," "have," and "consist of" are used in this specification, other parts may be added unless "only" is used. When a component is expressed in the singular, the plural may also be included unless otherwise explicitly stated.

[0015] When interpreting elements, they are to be interpreted as including error ranges or tolerances even if there is no other explicit mention of error ranges.

[0016] When describing a positional relationship, for example, when the positional relationship of two parts is described using "above," "on top," "below," or "beside," one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0017] When describing a temporal relationship, for example, when the temporal sequence is described using "after," "following," "next," or "before," it can also include cases where the sequence is not consecutive, as long as "immediately" or "directly" is not used.

[0018] Although terms such as "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, a first component referred to below may also be a second component within the technical concept of the present invention.

[0019] In describing components in this specification, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are used to distinguish the component from other components, and do not limit the nature, order, sequence, or number of the components. When a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that other components may be "intervening" between each component that may be indirectly coupled or connected unless otherwise explicitly stated.

[0020] "At least one" should be understood to include all combinations of one or more of the associated components. For example, the meaning of "at least one of the first, second, and third components" can include not only the first, second, or third component, but also all combinations of two or more of the first, second, and third components.

[0021] The features of the various embodiments of this specification may be partially or wholly combined or combined with each other, may be technically interlocked and driven in various ways, and each embodiment may be implemented independently of the others or may be implemented together in a related relationship.

[0022] The following detailed description of the present invention will be given with reference to the accompanying drawings and examples. The scales of the components shown in the drawings are different from the actual scales for the convenience of explanation, and are not limited to the scales shown in the drawings.

[0023] FIG. 1 is a diagram showing an apparatus according to an embodiment of the present specification, and FIG. 2 is a cross-sectional view taken along line AA' shown in FIG.

[0024] Referring to FIGS. 1 and 2, an apparatus according to an embodiment of the present disclosure may include a passive vibrating member 100 and a vibrating device 200 .

[0025] The "device" according to the embodiments of the present specification may be a display device, an audio device, an audio generating device, a sound bar, analog signage, or digital signage, but the embodiments of the present specification are not limited thereto.

[0026] The display device may include a display panel including a plurality of pixels that realize a black-and-white or color image, and a driver for driving the display panel. For example, the display panel may be a liquid crystal display panel, an organic light-emitting display panel, a light-emitting diode display panel, an electrophoretic display panel, an electrowetting display panel, a micro light-emitting diode display panel, or a quantum dot light-emitting display panel, but the embodiments of the present specification are not limited thereto. For example, in an organic light-emitting display panel, a pixel may include an organic light-emitting element such as an organic light-emitting layer, and the pixel may be a sub-pixel that realizes one of a plurality of colors that constitute a color image. Therefore, the "device" according to the embodiments of the present specification may also include a set electronic apparatus or set device or set apparatus, such as a notebook computer, television, computer monitor, automotive apparatus or other form of vehicle, which is a complete product or final product including a display panel such as a liquid crystal display panel or an organic light-emitting display panel, or a mobile electronic apparatus such as a smartphone or an electronic pad.

[0027] The analog signage may be an advertising billboard, a poster, a guide board, or the like. The analog signage may include content such as text, pictures, and symbols. The content may be arranged so as to be visible from the passive vibration member 100 side of the device. The content may be directly attached to the passive vibration member 100, or a medium such as paper on which the content is attached by printing or the like may be attached to the passive vibration member 100.

[0028] The passive vibration member 100 can be vibrated by being driven (or vibrated) by the vibration device 200. For example, the passive vibration member 100 can generate one or more of vibration and sound by being driven by the vibration device 200.

[0029] The passive vibration member 100 according to the embodiment of the present specification may be a display panel including a display unit (or screen) having a plurality of pixels for realizing black and white or color images. Thus, the passive vibration member 100 can generate one or more of vibration and sound by driving the vibration device 200. For example, the passive vibration member 100 can vibrate by driving the vibration device 200 while displaying an image on the display unit, thereby generating or outputting sound synchronized with the image on the display unit.

[0030] The passive vibration member 100 according to other embodiments of the present specification may be a non-display panel instead of a display panel. For example, the passive vibration member 100 may be a vibration panel including one or more materials selected from the group consisting of wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather, but the embodiments of the present specification are not limited thereto.

[0031] The passive vibration member 100 according to the embodiments of the present specification may be a vibration object, a display member, a display panel, a signage panel, a passive vibration plate, a front cover, a front member, a vibration panel, a sound panel, or a passive vibration panel, but the embodiments of the present specification are not limited thereto.

[0032] The vibration device 200 may be configured to vibrate the passive vibration member 100. The vibration device 200 may be configured to be coupled to the rear surface of the passive vibration member 100. In this way, the vibration device 200 vibrates the passive vibration member 100, thereby generating or outputting one or more of vibration and sound due to the vibration of the passive vibration member 100.

[0033] The vibration device 200 may be connected or coupled to the rear surface 100a of the passive vibration member 100. The vibration device 200 may divide the passive vibration member 100 into multiple regions (or vibration regions or divided regions) and vibrate them. For example, the vibration device 200 may be configured to vibrate each of the multiple regions set on the passive vibration member 100 independently or individually. For example, each of the multiple regions set on the passive vibration member 100 may have the same size or area, although the embodiments of the present specification are not limited thereto. For example, the size of each of the multiple regions may include a length in a first direction (X) and a length in a second direction (Y).

[0034] A vibration device 200 according to embodiments of the present disclosure may include multiple active vibration members 200M, 200S.

[0035] The active vibration members 200M, 200S may be coupled or connected to the rear surface 100a of the passive vibration member 100 at predetermined intervals along at least one of a first direction (X) and a second direction (Y). For example, the first direction (X) may intersect or be perpendicular to the second direction (Y). For example, the first direction (X) may be the horizontal direction or the length direction of the long sides of the passive vibration member 100. For example, the second direction (Y) may be the vertical direction or the length direction of the short sides of the passive vibration member 100. For example, the active vibration members 200M, 200S may be arranged or positioned at predetermined intervals along at least one of the first direction (X) and the second direction (Y), thereby forming a vibration array, an array vibration device, or a tiling vibration device.

[0036] Each of the plurality of active vibrating members 200M, 200S according to the embodiments of the present specification may include a vibrating element 210 and a connecting member 220.

[0037] The vibration element 210 can vibrate (or be displaced) by an input drive signal. For example, the vibration element 210 can vibrate (or be displaced) by alternately repeating contraction and expansion due to the piezoelectric effect (or piezoelectric characteristics) caused by the input drive signal. The drive signal can be an AC signal such as an acoustic signal, a vibration drive signal, or an audio signal. The vibration elements 210 of each of the multiple active vibration members 200M, 200S can vibrate (or be displaced) by the same or different drive signals.

[0038] According to embodiments of the present specification, the drive signals applied to the vibration elements 210 of each of the active vibration members 200M, 200S may have the same phase or in-phase or opposite phases or anti-phases. According to other embodiments of the present specification, the drive signals applied to the vibration elements 210 of each of the active vibration members 200M, 200S may have the same period and at least one of the phase and amplitude may be the same or different.

[0039] The vibration elements 210 of each of the active vibration members 200M, 200S according to the embodiments of the present specification may be single-layer vibration elements or multi-layer vibration elements, but the embodiments of the present specification are not limited thereto. Each of the active vibration members 200M, 200S may include one or more piezoelectric elements having piezoelectric properties. The piezoelectric element may be an element that displaces due to the inverse piezoelectric effect when a drive signal (or voltage) based on an input acoustic signal is applied. The piezoelectric element may be an element that undergoes bending displacement (or bending vibration) due to voltage, such as a bimorph or unimorph.

[0040] According to an embodiment of the present specification, when the vibration element 210 is a single-layer vibration element, the vibration element 210 may include one piezoelectric element. One piezoelectric element may include a piezoelectric layer, one or more first electrodes disposed on a first surface of the piezoelectric layer, and one or more second electrodes disposed on a second surface of the piezoelectric layer that is different from the first surface. For example, the piezoelectric layer may include a front surface and a back surface. For example, the first surface of the piezoelectric layer may be a first region within the front surface (or back surface) of the piezoelectric layer, and the second surface of the piezoelectric layer may be a second region separated from the first region on the front surface (or back surface) of the piezoelectric layer. For example, the first surface of the piezoelectric layer may be the front surface of the piezoelectric layer, and the second surface of the piezoelectric layer may be the back surface of the piezoelectric layer.

[0041] According to an embodiment of the present specification, when the vibration element 210 is a stacked vibration element, the vibration element 210 may include a plurality of piezoelectric elements. For example, an electrode interposed between two vertically adjacent piezoelectric elements among the plurality of piezoelectric elements may be used as a common electrode that applies the same drive signal to each of the two vertically adjacent piezoelectric elements, but the embodiment of the present specification is not limited thereto. For example, an elastic insulating layer may be interposed between two vertically adjacent piezoelectric elements among the plurality of piezoelectric elements. For example, the elastic insulating layer may act as a weight (or mass) that increases the weight of the piezoelectric element or vibration element 210, thereby reducing the resonant frequency (or natural frequency) of the piezoelectric element or vibration element 210. (mass) It can also act as a

[0042] The material of the piezoelectric layer according to the embodiments of the present specification is not particularly limited, but may be a ceramic-based piezoelectric material capable of achieving relatively high vibration, or a piezoelectric ceramic material having a perovskite-based crystal structure. For example, the piezoelectric layer may be a lead (Pb)-containing piezoelectric material or a lead (Pb)-free piezoelectric material. For example, the lead (Pb)-containing piezoelectric material may include one or more of a PZT (Lead Zirconate Titanate)-based material, a PZNN (Lead Zirconate Nickel Niobate)-based material, a PMN (Lead Magnesium Niobate)-based material, a PNN (Lead Nickel Niobate)-based material, a PZN (Lead Zirconate Niobate)-based material, and a PIN (Lead Indium Niobate)-based material, but the embodiments of the present specification are not limited thereto. For example, lead (Pb)-free piezoelectric materials can include, but are not limited to, one or more of barium titanate (BaTiO), calcium titanate (CaTiO), and strontium titanate (SrTiO).

[0043] The connecting member 220 may be disposed between the vibration element 210 and the passive vibration member 100. The connecting member 220 may be connected between the vibration element 210 and the passive vibration member 100. For example, the connecting member 220 may be connected to or adhered to the vibration element 210 and the passive vibration member 100. For example, the entire first surface (or front or top surface) of the connecting member 220 may be connected to or adhered to the rear surface 100a of the passive vibration member 100, and the entire second surface (or rear or bottom surface) opposite to the first surface of the connecting member 220 may be connected to or adhered to the vibration element 210. For example, the vibration element 210 may be connected to or adhered to the rear surface 100a of the passive vibration member 100 by a full-surface adhesive method using the connecting member 220.

[0044] The connecting member 220 according to the embodiments of the present disclosure may include an elastic material that is compressible and resilient while having adhesive properties. For example, the connecting member 220 may include an adhesive material that is elastic or stretchable. For example, the connecting member 220 may include an adhesive material with a low modulus of elasticity (or Young's modulus). For example, the connecting member 220 may be formed of an adhesive resin, glue, adhesive tape, or adhesive pad, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive tape may include double-sided tape, double-sided foam tape, or double-sided sponge tape having an adhesive layer. The adhesive pad may include an elastic pad such as a rubber pad or silicone pad having an adhesive layer and capable of compressing and resilient. For example, the connecting member 220 may be an adhesive member, adhesive agent, or pad member.

[0045] The connecting member 220 according to the embodiment of the present specification of The adhesive resin, adhesive, or adhesive layer may include an epoxy-based, acrylic-based, silicone-based, or urethane-based adhesive material. For example, the connecting member 220 may include an acrylic-based adhesive material, which has relatively excellent adhesive strength and high hardness among acrylics and urethanes, so that the vibration of the vibrating element 210 is efficiently transmitted to the passive vibration member 100. However, the embodiments of the present specification are not limited thereto.

[0046] The connecting member 220 according to the embodiment of the present specification of The adhesive resin, adhesive, or adhesive layer may be a photo-curable adhesive material, but examples herein are not limited thereto. For example, the adhesive resin, adhesive, or adhesive layer may be a UV (ultraviolet) adhesive, but examples herein are not limited thereto.

[0047] The device according to the embodiments herein may further include a support member 300 and a coupling member 350 .

[0048] The support member 300 may be disposed on the rear surface 100a of the passive vibration member 100. The support member 300 may be disposed on the rear surface 100a of the passive vibration member 100 so as to cover the vibration device 200. The support member 300 may be disposed on the rear surface 100a of the passive vibration member 100 so as to cover the entire rear surface 100a of the passive vibration member 100 and the vibration device 200. For example, the support member 300 may have the same size as the passive vibration member 100. For example, the support member 300 may be disposed on the rear surface 100a of the passive vibration member 100 so as to have a gap between the passive vibration member 100 and the vibration device 200. space The passive vibration member 100 can cover the entire rear surface thereof with a gap space (GS) therebetween. The gap space (GS) can be provided by a coupling member 350 disposed between the passive vibration member 100 and the support member 300 facing each other. The gap space (GS) can be expressed as an air gap, a storage space, a vibration space, an acoustic sound chamber, or the like, and is not limited to these terms.

[0049] The support member 300 may include any of glass, metal, and plastic materials. The support member 300 may include a laminated structure in which at least one of glass, metal, and plastic materials is laminated. For example, the support member 300 may be made of a material having relatively high rigidity or hardness compared to the passive vibration member 100. For example, the support member 300 may be a back structure, a support structure, a support plate, a support cover, a back cover, a housing, or a back member, but is not limited to these terms.

[0050] Each of the passive vibration member 100 and the support member 300 may have, but is not limited to, a square or rectangular shape, and may have a polygonal, non-polygonal, circular, or elliptical shape. For example, when the device according to the embodiment of the present specification is applied to an acoustic device or an acoustic bar, each of the passive vibration member 100 and the support member 300 has a long side. of Length is the short side of It may have a rectangular shape that is more than twice as long as it is long, although examples herein are not limited thereto.

[0051] The coupling member 350 is connected to the rear surface of the passive vibration member 100. of Edge portion and front surface of support member 300 of By being configured to be coupled between the edge portions, a gap space (GS) can be provided between the passive vibration member 100 and the support member 300 that face each other.

[0052] The connecting member 350 according to the embodiment of the present disclosure may include an elastic material that is compressible and resilient while having adhesive properties. For example, the connecting member 350 may include, but is not limited to, a double-sided tape, a single-sided tape, or a double-sided adhesive foam pad, and may include an elastic pad such as a rubber pad or a silicone pad that is compressible and resilient while having adhesive properties. For example, the connecting member 350 may be made of an elastomer.

[0053] As another example, the support member 300 may be of The support member 300 may further include a side wall portion for supporting the edge portion. of From the edge portion to the back surface of the passive vibration member 100 of By being protruded or bent toward the edge portion, a gap space (GS) can be provided between the passive vibration member 100 and the support member 300. In this case, the coupling member 350 is connected to the side wall portion of the support member 300 and the back surface of the passive vibration member 100. of The support member 300 may be configured to be coupled between the vibration device 200 and the edge portion of the passive vibration member 100. This allows the support member 300 to cover the vibration device 200 and support the back surface of the passive vibration member 100. For example, the support member 300 may be configured to cover the vibration device 200 and support the back surface of the passive vibration member 100. of The edge portions can be supported.

[0054] Optionally, the passive vibration member 100 is attached to the front surface of the support member 300. of The passive vibration member 100 may further include a side wall portion connected to the edge portion. of From the edge portion to the front surface of the support member 300 ofBy protruding or bending toward the edge portion, a gap space (GS) can be provided between the passive vibration member 100 and the support member 300. The passive vibration member 100 can have increased rigidity by the side wall portion. In this case, the coupling member 350 is connected to the side wall portion of the passive vibration member 100 and the back surface of the support member 300. of The support member 300 may be configured to be coupled between the vibration device 200 and the edge portion of the passive vibration member 100. This allows the support member 300 to cover the vibration device 200 and support the back surface of the passive vibration member 100. For example, the support member 300 may be configured to cover the vibration device 200 and support the back surface of the passive vibration member 100. of The edge portions can be supported.

[0055] FIG. 3 is a diagram illustrating the vibration device according to the embodiment of the present specification shown in FIG.

[0056] 2 and 3, a vibration device 200 according to an embodiment of the present disclosure may include multiple active vibration members 200M, 200S.

[0057] The plurality of active vibration members 200M, 200S may be arranged or positioned on the same plane to have a predetermined interval (Dx, Dy). The plurality of active vibration members 200M, 200S may be arranged in a matrix or lattice on the back surface 100a of the passive vibration member 100, but the embodiments of the present specification are not limited thereto. For example, the plurality of active vibration members 200M, 200S may be arranged or positioned to have a first interval (or separation distance) (Dx) along the first direction (X) and a second interval (or separation distance) (Dy) along the second direction (Y). For example, the first interval (Dx) and the second interval (Dy) may be 20 mm or more and 50 mm or less, but the embodiments of the present specification are not limited thereto, and the vibration element 21 0 and the size of the passive vibration member 100.

[0058] According to an embodiment of the present specification, one of the plurality of active vibration members 200M, 200S may be a main active vibration member 200M, and the remaining plurality of active vibration members 200S1 to 200S8 among the plurality of active vibration members 200M, 200S, excluding the main active vibration member 200M, may be a plurality of sub active vibration members 200S. For example, the main active vibration member 200M may be a first active vibration member, a reference active vibration member, a central active vibration member, or a master active vibration member. For example, each of the sub active vibration members 200S may be a second active vibration member, an auxiliary active vibration member, a peripheral active vibration member, or a slave active vibration member.

[0059] The main active vibration member 200M may be located at the center (or exact center) of the vibration area of ​​the passive vibration member 100 vibrated by the vibration device 200. The center (or exact center) of the main active vibration member 200M may be located or aligned with the center (or exact center) of the vibration area of ​​the passive vibration member 100. For example, as shown in FIG. 3, when the vibration device 200 includes nine active vibration members 200M, 200S arranged in a 3×3 configuration, the active vibration members 200M arranged in two rows and two columns (2, 2) in the 3×3 configuration may be set as the main active vibration member 200M.

[0060] Each of the multiple sub active vibration members 200S may be arranged around the main active vibration member 200M, with the main active vibration member 200M at the center. For example, each of the multiple sub active vibration members 200S may be arranged in a grid pattern or radially around the main active vibration member 200M, but the embodiments of the present specification are not limited thereto. For example, each of the multiple sub active vibration members 200S may be arranged regularly around the main active vibration member 200M, or irregularly or randomly, based on at least one of the material characteristics of the passive vibration member 100 and the vibration (or displacement) characteristics of the vibration region.

[0061] According to an embodiment of the present specification, each of the plurality of sub active vibration members 200S may be arranged around the main active vibration member 200M on the top, bottom, left, and right sides, respectively. Each of the plurality of sub active vibration members 200S may be arranged around the main active vibration member 200M on the top, bottom, left, and right sides, respectively, with a first distance (Dx) and a second distance (Dy) from the main active vibration member 200M. For example, as shown in FIG. 3, when a vibration device 200 includes nine active vibration members 200M, 200S arranged in a 3×3 pattern with a first distance (Dx) and a second distance (Dy), the active vibration members 200M arranged in two rows and two columns (2,2) in the 3×3 pattern may be the main active vibration member 200M, and the remaining eight active vibration members 200S, excluding the active vibration member 200M arranged in the two rows and two columns (2,2), may be the plurality of sub active vibration members 200S. For example, when the vibration device 200 includes nine active vibration members 200M, 200S arranged in a 3×3 configuration, the vibration device 200 includes a main active vibration member 200M and first to eighth active vibration members 200S arranged around the main active vibration member 200M so as to surround the main active vibration member 200M. Sub It may include active vibration members 200S1 to 200S8.

[0062] According to the embodiment of the present specification, the main active vibration member 200M and the plurality of sub active vibration members 200S can be driven (or vibrated) simultaneously by a drive signal based on a single sound source signal, thereby being driven as a single vibration device. As a result, the vibration device 200 according to the embodiment of the present specification uses the plurality of active vibration members 200M, 200S having a relatively small size to vibrate the passive vibration member 100 having a relatively large size (or area), thereby increasing the vibration amplitude (or displacement amplitude) of the passive vibration member 100, and thereby improving the acoustic characteristics and sound pressure characteristics in the low frequency range generated by the vibration of the passive vibration member 100.

[0063] The inventors of the present specification have conducted several experiments to further improve the acoustic characteristics and sound pressure characteristics in the low frequency range when multiple active vibration members 200M, 200S are connected to the passive vibration member 100 in an array (or tiling) form and the passive vibration member 100 is vibrated based on a single sound source signal to generate or output sound.

[0064] Through several experiments, it was recognized that the vibration of each of the plurality of active vibration members 200M, 200S is propagated radially in the vibration area of ​​the passive vibration member 100, and that the vibration amplitude (or displacement amplitude) of the passive vibration member 100 is reduced in a specific area within the vibration area of ​​the passive vibration member 100 due to interference of vibration and / or reflected vibration waves. Through several experiments, it was determined that the main active vibration member 200M and the first to eighth active vibration members 200S are propagated radially in the vibration area of ​​the passive vibration member 100. Sub It has been recognized that the acoustic characteristics and sound pressure characteristics in the low frequency range can be further improved by differently controlling at least one of the driving signals applied to each of the active vibration members 200S1 to 200S8, as will be explained with reference to FIG.

[0065] FIG. 4 is a block diagram showing a vibration drive circuit according to a first embodiment of the present specification, and FIG. 5 is a waveform diagram showing a drive signal for driving an active vibration member according to an embodiment of the present specification.

[0066] 3 to 5, the vibration driver circuit 400 according to the first embodiment of the present specification generates a plurality of vibration signals based on one sound source signal (SS) input from a host device (or a host driver circuit). of A drive signal (DS) for vibrating (or displacing) each of the active vibration members 200M, 200S can be generated, and the generated drive signal (DS) can be supplied to the corresponding active vibration member 200M, 200S.

[0067] The drive signal (DS) applied to the main active vibration member 200M is referred to as the main drive signal (MDS), and the drive signals (DS) applied to each of the multiple sub active vibration members 200S can be referred to as multiple sub drive signals (SDS1 to SDS8). The vibration drive circuit 400 can generate the main drive signal (MDS) for vibrating (or displacing) the main active vibration member 200M and the multiple sub drive signals (SDS1 to SDS8) for vibrating (or displacing) the multiple sub active vibration members 200S based on a single sound source signal (SS). For example, the vibration drive circuit 400 can generate the main drive signal (MDS) and the first to eighth sub drive signals (SDS1 to SDS8) based on a single sound source signal (SS).

[0068] According to the embodiments of the present specification, the main driving signal (MDS) and each of the plurality of sub-driving signals (SDS1 to SDS8) are generated based on the same sound source signal or one sound source signal, and the main driving signal (MDS) and each of the plurality of sub-driving signals (SDS1 to SDS8) can have the same period or can be varied (or changed) in the same way.

[0069] Each of the first to eighth sub-driving signals (SDS1 to SDS8) according to the embodiments of the present specification may be the same as or different from the main driving signal (MDS). For example, at least one of the first to eighth sub-driving signals (SDS1 to SDS8) may be the same as or different from the main driving signal (MDS). For example, at least one of the phases and amplitudes of each of the first to eighth sub-driving signals (SDS1 to SDS8) may be the same as or different from at least one of the phases and amplitudes of the main driving signal (MDS).

[0070] According to the embodiment of the present specification, the phase of each of the first to eighth sub-driving signals (SDS1 to SDS8) may be the same as or different from the phase of the main driving signal (MDS). For example, at least one of the first to eighth sub-driving signals (SDS1 to SDS8) may have the same phase as the main driving signal (MDS) or an opposite phase. For example, when the main driving signal (MDS) has a positive polarity phase, at least one of the first to eighth sub-driving signals (SDS1 to SDS8) may have a positive polarity phase or an opposite negative polarity phase.

[0071] According to another embodiment of the present specification, the amplitude of each of the first to eighth sub-driving signals (SDS1 to SDS8) may be the same as or different from the amplitude of the main driving signal (MDS). For example, at least one of the first to eighth sub-driving signals (SDS1 to SDS8) may have the same or different amplitude as the main driving signal (MDS). For example, at least one of the first to eighth sub-driving signals (SDS1 to SDS8) may have the same or smaller amplitude as the main driving signal (MDS).

[0072] The vibration drive circuit 400 according to the first embodiment of this specification includes an amplifier circuit section 410 that generates a drive signal (DS) for vibrating (or displacing) each of the multiple active vibration members 200M, 200S based on a single sound source signal (SS) input from a host device (or host drive circuit) and supplies the generated drive signal (DS) to the corresponding active vibration member 200M, 200S.

[0073] The amplifier circuit unit 410 may be configured to amplify one input sound source signal (SS) and supply it to each of the multiple active vibration members 200M, 200S. The amplifier circuit unit 410 may include multiple amplifier circuits 410M, 410S1 to 410S8 corresponding to each of the multiple active vibration members 200M, 200S. For example, the amplifier circuit unit 410 may include a main amplifier circuit 410M and multiple sub amplifier circuits 410S1 to 410S8. The amplifier circuit unit 410 may include a main amplifier circuit 410M and first to eighth sub amplifier circuits 410S1 to 410S8.

[0074] The main amplifier circuit 410M and each of the sub amplifier circuits 410S1 to 410S8 can simultaneously receive the same sound source signal, amplify the sound source signal by a preset gain value (or gain values), and generate a drive signal (DS).

[0075] 5, the main amplifier circuit 410M can amplify the sound source signal with any one of a plurality of positive drive signals (PDS1 to PDS5) and a plurality of negative drive signals (NDS1 to NDS5) according to a preset gain value (or gain value) to generate a main drive signal (MDS) and supply the generated main drive signal (MDS) to the main active vibration member 200M. For example, the main amplifier circuit 410M can amplify the sound source signal with any one of the first to fifth positive drive signals (PDS1 to PDS5) and the first to fifth negative drive signals (NDS1 to NDS5) according to a preset gain value (or gain value) to generate a main drive signal (MDS).

[0076] The first positive drive signal (PDS1) and the first negative drive signal (NDS1) may have the same period and a first amplitude (A1), and the first negative drive signal (NDS1) may be a signal with an opposite phase to the first positive drive signal (PDS1).

[0077] The second positive drive signal (PDS2) and the second negative drive signal (NDS2) may have the same period and second amplitude (A2). The second negative drive signal (NDS2) may be a signal with an opposite phase to the second positive drive signal (PDS2). For example, the second amplitude (A2) may be 1 / 2 of the first amplitude (A1) (A2 = A1 × 1 / 2), but the embodiments of the present specification are not limited thereto.

[0078] The third positive drive signal (PDS3) and the third negative drive signal (NDS3) may have the same period and third amplitude (A3). The third negative drive signal (NDS3) may be a signal with an opposite phase to the third positive drive signal (PDS3). For example, the third amplitude (A3) may be 2 / 3 of the first amplitude (A1) (A3 = A1 × 2 / 3), but the embodiments of the present specification are not limited thereto.

[0079] The fourth positive drive signal (PDS4) and the fourth negative drive signal (NDS4) may have the same period and fourth amplitude (A4). The fourth negative drive signal (NDS4) may be a signal with an opposite phase to the fourth positive drive signal (PDS4). For example, the fourth amplitude (A4) may be 1 / 3 of the first amplitude (A1) (A4 = A1 × 1 / 3), but the embodiments of the present specification are not limited thereto.

[0080] The fifth positive drive signal (PDS5) and the fifth negative drive signal (NDS5) may have the same period and fifth amplitude (A5). The fifth negative drive signal (NDS5) may be a signal with an opposite phase to the fifth positive drive signal (PDS5). For example, the fifth amplitude (A5) may be 1 / 4 of the first amplitude (A1) (A5 = A1 × 1 / 4), but the embodiments of the present specification are not limited thereto.

[0081] According to an embodiment of the present specification, the main amplifier circuit 410M may be realized to amplify the sound source signal with any one of a first positive polarity drive signal (PDS1), a first negative polarity drive signal (NDS1), a second positive polarity drive signal (PDS2), and a second negative polarity drive signal (NDS1) according to a preset gain value (or gain value), as shown in FIG. 5, and output a main drive signal (MDS), but the embodiment of the present specification is not limited thereto.

[0082] According to the embodiments of the present specification, each of the multiple (or first to eighth) sub-amplification circuits 410S1 to 410S8 can amplify the sound source signal using one of multiple positive polarity drive signals (PDS1 to PDS5) and multiple negative polarity drive signals (NDS1 to NDS5) according to a preset gain value (or gain value), as shown in FIG. 5, to generate a corresponding sub-drive signal (SDS1 to SDS8), and supply the generated sub-drive signal (SDS1 to SDS8) to the corresponding sub-active vibration member 200S1 to 200S8. For example, each of the multiple (or first to eighth) sub-amplification circuits 410S1 to 410S8 can amplify the sound source signal using a preset gain value (or gain value) with one of the first to fifth positive polarity drive signals (PDS1 to PDS5) and the first to fifth negative polarity drive signals (NDS1 to NDS5) to generate sub-drive signals (SDS1 to SDS8).

[0083] The gain value (or gain value) of each of the plurality (or first to eighth) sub-amplifier circuits 410S1 to 410S8 can be set based on the vibration (or displacement) deviation for each region generated in the vibration region of the passive vibration member 100 vibrating due to the driving (or vibration) of the vibration device 200. The gain value (or gain value) of each of the plurality (or first to eighth) sub-amplifier circuits 410S1 to 410S8 can be set so that the vibration amplitude (or displacement amplitude) in the vibration region of the passive vibration member 100 has symmetry around the vibration region of the main active vibration member 200M.

[0084] According to the embodiments of the present specification, the vibration region of the passive vibration member 100 may include a region with a large vibration amplitude (or displacement amplitude) due to vibration interference and / or reflected vibration waves, a small region, and an intermediate region. Thus, the gain value (or gain value) of each of the plurality of (or first to eighth) sub-amplifier circuits 410S1 to 410S8 may be set to reduce or minimize the deviation of vibration (or displacement) among regions in the vibration region of the passive vibration member 100. For example, when vibrations in the vibration region having a large vibration amplitude (or displacement amplitude) increase and vibrations in the vibration region having a small vibration amplitude (or displacement amplitude) decrease in the vibration region of the passive vibration member 100, the vibration amplitude (or displacement amplitude) of the passive vibration member 100 may be further increased or maximized, thereby further improving the acoustic characteristics and sound pressure characteristics in the low-frequency range generated by the passive vibration member 100. As a result, the gain value (or gain value) of each of the multiple (or first to eighth) sub-amplifier circuits 410S1 to 410S8 can be set to be the same as or different from the gain value (or gain value) of the main amplifier circuit 410M based on the vibration amplitude (or displacement amplitude) in the vibration region of the passive vibration member 100.

[0085] As described above, the vibration drive circuit 400 according to the first embodiment of the present specification varies (or changes) the sub drive signals (SDS1 to SDS8) applied to at least one of the plurality of sub active vibration members 200S1 to 200S8 according to the sound source signal (SS) so as to be different from the main drive signal (MDS), thereby further improving the acoustic characteristics and sound pressure characteristics of the low frequency band generated by the passive vibration member 100. For example, the vibration drive circuit 400 according to the first embodiment of the present specification can vary (or change) at least one of the phase and amplitude of the sub drive signal SDS applied to at least one of the plurality of sub active vibration members 200S1 to 200S8 based on at least one of the phase and amplitude of the main drive signal (MDS) applied to the main active vibration member 200M. As a result, the regional vibration (or displacement) deviation in the vibration area of ​​the passive vibration member 100 is reduced or minimized, thereby further improving the acoustic characteristics and sound pressure characteristics in the low-frequency range generated by the passive vibration member 100.

[0086] FIG. 6 is a block diagram showing a vibration drive circuit according to a second embodiment of the present specification.

[0087] Referring to Figure 6, the vibration drive circuit 400 according to the second embodiment of the present specification can generate a drive signal (DS) for vibrating (or displacing) each of the multiple active vibration members 200M, 200S based on one sound source signal (SS) input from a host device (or host drive circuit), and supply the generated drive signal (DS) to the corresponding active vibration member 200M, 200S.

[0088] The vibration driver circuit 400 according to the second embodiment of the present specification can include an amplifier circuit 430 and a signal conversion section 440 .

[0089] The amplifier circuit 430 can simultaneously receive the same sound source signal and amplify the sound source signal according to a preset gain value (or gain value) to generate a sound source amplified signal (SAS). For example, the amplifier circuit 430 can include a preamplifier and a main amplifier. The sound source signal (or acoustic signal) (SS) input to the vibration driver circuit 400 is amplified by the preamplifier. By The signal that has been primarily amplified by the preamplifier may be further amplified by the main amplifier and output as a source amplified signal (SAS).

[0090] The signal conversion unit 440 converts the sound source amplified signal (SAS) supplied from the amplifier circuit 430 into a driving signal (DS), and supplies the converted driving signal (DS) to the corresponding active vibration members 200M and 200S. For example, the signal conversion unit 440 converts the sound source amplified signal (SAS) supplied from the amplifier circuit 430 into a driving signal (DS) according to a preset signal conversion coefficient (or gain value). Therefore The converted drive signals (DS) can be supplied to the corresponding active vibration members 200M, 200S.

[0091] The signal conversion unit 440 according to the embodiment of the present specification may include a plurality of signal conversion circuits 440M, 440S1 to 440S8 corresponding to the plurality of active vibration members 200M, 200S, respectively. For example, the signal conversion unit 440 may include a main conversion circuit 440M and a plurality of sub conversion circuits 440S1 to 440S8. The signal conversion unit 440 may include a main conversion circuit 440M and first to eighth sub conversion circuits 440S1 to 440S8.

[0092] 5, the main conversion circuit 440M can convert the sound source amplified signal (SAS) supplied from the amplifier circuit 430 into one of a plurality of positive polarity drive signals (PDS1 to PDS5) and a plurality of negative polarity drive signals (NDS1 to NDS5) according to a preset signal conversion coefficient (or gain value) to generate a main drive signal (MDS), and supply the generated main drive signal (MDS) to the main active vibration member 200M. For example, the main conversion circuit 440M can convert the sound source amplified signal (SAS) into one of first to fifth positive polarity drive signals (PDS1 to PDS5) and first to fifth negative polarity drive signals (NDS1 to NDS5) according to a preset signal conversion coefficient (or gain value) to generate a main drive signal (MDS). These first to fifth positive drive signals (PDS1 to PDS5) and first to fifth negative drive signals (NDS1 to NDS5) are the same as those described with reference to Figures 4 and 5, so duplicated description thereof will be omitted.

[0093] According to an embodiment of the present specification, the main conversion circuit 440M may be implemented to convert the sound source amplified signal (SAS) into any one of a first positive polarity drive signal (PDS1), a first negative polarity drive signal (NDS1), a second positive polarity drive signal (PDS2), and a second negative polarity drive signal (NDS1) according to a preset signal conversion coefficient (or gain value), as shown in FIG. 5, and output the main drive signal (MDS), but the embodiment of the present specification is not limited thereto.

[0094] According to the embodiments of the present specification, each of the multiple (or first to eighth) sub-conversion circuits 440S1 to 440S8 can convert the sound source amplified signal (SAS) supplied from the amplifier circuit 430 into one of multiple positive polarity drive signals (PDS1 to PDS5) and multiple negative polarity drive signals (NDS1 to NDS5) using a predetermined signal conversion coefficient (or gain value), as shown in FIG. 5, to generate a corresponding sub-drive signal (SDS1 to SDS8), and supply the generated sub-drive signal (SDS1 to SDS8) to the corresponding sub-active vibration member 200S1 to 200S8. For example, each of the multiple (or first to eighth) sub-conversion circuits 440S1 to 440S8 can convert the sound source amplified signal (SAS) into one of the first to fifth positive polarity drive signals (PDS1 to PDS5) and the first to fifth negative polarity drive signals (NDS1 to NDS5) using a preset signal conversion coefficient (or gain value) to generate a sub-drive signal (SDS1 to SDS8).

[0095] The vibration drive circuit 400 according to the second embodiment of this specification can further improve the acoustic characteristics and sound pressure characteristics in the low frequency range generated by the passive vibration member 100, similar to the vibration drive circuit 400 described in Fig. 4. The vibration drive circuit 400 according to the second embodiment of this specification can reduce the number of amplifier circuits used compared to the vibration drive circuit 400 described in Fig. 4.

[0096] 7 is a block diagram showing a vibration drive circuit according to a third embodiment of the present specification, in which a signal processing section is further configured in addition to the vibration drive circuit shown in FIG.

[0097] Referring to Figure 7, the vibration driving circuit 400 according to the third embodiment of the present specification can analyze one sound source signal (SS) input from a host device (or host driving circuit), generate a driving signal (DS) for vibrating (or displacing) each of the multiple active vibration members 200M, 200S, and supply the generated driving signal (DS) to the corresponding active vibration members 200M, 200S.

[0098] The vibration driver circuit 400 according to the third embodiment of the present specification can include a signal processing unit 450 and an amplifier circuit unit 470 .

[0099] The signal processing unit 450 can receive one sound source signal (SS) input from the host device (or host driving circuit) in real time. One sound source signal (SS) can be simultaneously supplied to both the signal processing unit 450 and the amplifier circuit unit 470.

[0100] The signal processing unit 450 can generate a plurality of gain values ​​(or gain values) based on one input sound source signal (SS). For example, the signal processing unit 450 can analyze the frequency characteristics or frequency band characteristics of the input sound source signal (SS) to generate a plurality of gain values ​​(or gain values).

[0101] The signal processing unit 450 according to the embodiment of the present specification may include a frequency analysis circuit 451 , a weight value generation circuit 453 , and a gain value generation unit 455 .

[0102] The frequency analysis circuit 451 can analyze the frequency characteristics or frequency band characteristics of the input sound source signal (SS) to generate frequency-specific intensity information. For example, the frequency analysis circuit 451 can analyze the frequency characteristics or frequency band characteristics of the input sound source signal (SS) in a predetermined time unit to generate frequency-specific intensity information. For example, the frequency analysis circuit 451 can analyze the frequency characteristics or frequency band characteristics of the input sound source signal (SS) in real time to generate frequency-specific intensity information.

[0103] The weight generation circuit 453 can classify the frequencies by frequency band (or by frequency range) based on the frequency-specific intensity information supplied from the frequency analysis circuit 451, and generate weights for each frequency band. For example, the weight generation circuit 453 can generate weights for each frequency band to control the vibration amplitude (or displacement amplitude) of each of the plurality of active vibration members 200M, 200S to be the same or to control the vibration amplitude (or displacement amplitude) of at least one of the plurality of active vibration members 200M, 200S differently, corresponding to the frequency-specific intensity information. For example, the weight generation circuit 453 can classify the frequencies by frequency band (or by frequency range), generate a main weight for each frequency band based on the intensity information of the main frequency for each frequency band, and generate a plurality of sub weights for each frequency band based on the intensity information of the sub-frequencies for each frequency band and the main gain value (or gain value), but the embodiments of the present specification are not limited thereto.

[0104] The gain value generation unit 455 can generate a plurality of gain values ​​(or gain values) based on the weighted values ​​for each frequency band supplied from the weighted value generation circuit 453. For example, the gain value generation unit 455 can generate a plurality of gain values ​​(or gain values) for varying (or changing) at least one of the phase and amplitude of the drive signal (DS) supplied to each of the plurality of active vibration members 200M, 200S based on the weighted values ​​for each frequency band supplied from the weighted value generation circuit 453. For example, the gain value generation unit 455 can generate a main gain value (or gain value) based on the main weighted values ​​for each frequency band supplied from the weighted value generation circuit 453, and can generate a plurality of sub-gain values ​​(or gain values) based on a plurality of sub-weighted values ​​for each frequency band supplied from the weighted value generation circuit 453.

[0105] The amplifier circuit unit 470 may be configured to amplify the input sound source signal (SS) by a plurality of gain values ​​(or gain values) supplied from the signal processing unit 450 and supply the amplified signal to each of the plurality of active vibration members 200M, 200S. The amplifier circuit unit 470 may include a plurality of amplifier circuits 470M, 470S1 to 470S8 corresponding to each of the plurality of active vibration members 200M, 200S. Each of the plurality of amplifier circuits 470M, 470S1 to 470S8 may amplify the sound source signal (SS) by the gain value (or gain value) supplied from the signal processing unit 450 to generate a drive signal (DS).

[0106] The amplifier circuit unit 470 according to the embodiment of the present specification may include a main amplifier circuit 470M and a plurality of sub amplifier circuits 470S1 to 470S8. For example, the amplifier circuit unit 470 may include a main amplifier circuit 470M and first to eighth sub amplifier circuits 470S1 to 470S8.

[0107] The main amplifier circuit 470M amplifies the sound source signal (SS) by a main gain value (or gain value) supplied from the signal processor 450 to generate a main drive signal (MDS), and can supply the generated main drive signal (MDS) to the main active vibration member 200M. The main amplifier circuit 470M is substantially the same as the main amplifier circuit 410M shown in FIG. 4, except that it amplifies the sound source signal (SS) by a main gain value (or gain value) supplied from the signal processor 450.

[0108] 5, the main amplifier circuit 470M amplifies the sound source signal (SS) with one of a plurality of positive drive signals (PDS1 to PDS5) and a plurality of negative drive signals (NDS1 to NDS5) according to a main gain value (or gain value) supplied from the signal processor 450 to generate a main drive signal (MDS), and supplies the generated main drive signal (MDS) to the main active vibration member 200M. For example, the main conversion circuit 470M can amplify the sound source signal (SS) with one of the first to fifth positive drive signals (PDS1 to PDS5) and the first to fifth negative drive signals (NDS1 to NDS5) according to a main gain value (or gain value) to generate a main drive signal (MDS). These first to fifth positive drive signals (PDS1 to PDS5) and first to fifth negative drive signals (NDS1 to NDS5) are the same as those described with reference to Figures 4 and 5, so duplicated description thereof will be omitted.

[0109] Each of the plurality of (or first to eighth) sub-amplification circuits 470S1 to 470S8 amplifies the sound source signal (SS) by a corresponding sub-gain value among a plurality of sub-gain values ​​(or gain values) supplied from the signal processing unit 450, generates a corresponding sub-drive signal among a plurality of (or first to eighth) sub-drive signals (SDS1 to SDS8), and transmits the generated sub-drive signals (SDS1 to SDS8) to the corresponding sub active vibration members 200S1 to 200S8. S 8. Each of the plurality (or first to eighth) sub-amplifier circuits 470S1 to 470S8 is substantially the same as each of the plurality (or first to eighth) sub-amplifier circuits 470S1 to 470S8 shown in FIG. 4, except that each of the plurality (or first to eighth) sub-amplifier circuits 470S1 to 470S8 amplifies the sound source signal (SS) by a sub-gain value (or gain value) supplied from the signal processing unit 450.

[0110] According to an embodiment of the present specification, a plurality of (or 1st to 8th) sub- amplificationAs shown in Fig. 5, each of the circuits 470S1 to 470S8 amplifies the sound source signal (SS) with one of a plurality of positive polarity drive signals (PDS1 to PDS5) and a plurality of negative polarity drive signals (NDS1 to NDS5) according to a sub-gain value (or gain value) supplied from the signal processing unit 450, generates a corresponding sub-drive signal (SDS1 to SDS8), and supplies the generated sub-drive signal (SDS1 to SDS8) to the corresponding sub active vibration member 200S1 to 200S8. For example, amplification Each of the circuits 470S1 to 470S8 can amplify the sound source signal (SS) with one of the first to fifth positive polarity drive signals (PDS1 to PDS5) and the first to fifth negative polarity drive signals (NDS1 to NDS5) according to a sub-gain value (or gain value) supplied from the signal processing unit 450 to generate a sub-drive signal (SDS1 to SDS8).

[0111] 4, the vibration driver circuit 400 according to the third embodiment of the present specification can further improve the acoustic characteristics and sound pressure characteristics in the low frequency range generated by the vibration of the passive vibration member 100. The vibration driver circuit 400 according to the third embodiment of the present specification can generate or output sound that corresponds to or is optimized for the sound source signal (SS) through the vibration of the passive vibration member 100 by analyzing the sound source signal (SS) in fixed time units or in real time and actively vibrating (or displacing) the vibration amplitude (or displacement amplitude) of each of the plurality of active vibration members 200M, 200S.

[0112] Fig. 8 is another cross-sectional view taken along line A-A' in Fig. 1, and Fig. 9 is a diagram showing the vibration device shown in Fig. 8. Figs. 8 and 9 are diagrams showing an apparatus or vibration device according to another embodiment of the present specification. Figs. 8 and 9 show a vibration device in which the connecting member in the apparatus described in Figs. 1 to 7 has been modified. Therefore, in the following description, the same reference numerals will be used for the remaining components, except for the connecting member and related components, and redundant description of these components will be omitted.

[0113] 8 and 9, in a vibration device 200 according to another embodiment of the present specification, a coupling member 230 may be disposed between a portion of the vibration element 210 and the passive vibration member 100. The coupling member 230 may be coupled between the portion of the vibration element 210 and the passive vibration member 100. For example, the coupling member 230 may be coupled or bonded to the portion of the vibration element 210 and the passive vibration member 100.

[0114] The connecting member 230 according to the embodiments of the present specification may include an elastic material that has adhesive properties and is compressible and resilient. For example, the connecting member 230 may include an adhesive material that is elastic or stretchable. For example, the connecting member 230 may include an adhesive material with a low modulus of elasticity (or Young's modulus). The connecting member 230 according to the embodiments of the present specification may be the same as the connecting member 220 shown in FIGS. 2 and 3, and therefore a redundant description thereof will be omitted. For example, the connecting member 230 may be an adhesive member, an elastic adhesive member, or a damping member, and is not limited to these terms.

[0115] A portion of a first surface (or front surface or top surface) of the connecting member 230 according to the embodiment of the present specification may be connected to or adhered to the rear surface 100a of the passive vibration member 100, and a portion of a second surface (or rear surface or bottom surface) opposite to the first surface of the connecting member 230 may be connected to or adhered to the vibration element 210. For example, a portion of the first surface (or front surface or top surface) of the connecting member 230 may be connected to or adhered to the rear surface 100a of the passive vibration member 100, and a portion of a second surface (or rear surface or bottom surface) opposite to the first surface of the connecting member 230 may be connected to or adhered to the vibration element 210. For example, the vibration element 210 may be connected to or adhered to the rear surface 100a of the passive vibration member 100 by a partial adhesion method using the connecting member 230.

[0116] The connecting member 230 according to the embodiments of the present specification may be smaller than the vibration element 210. The connecting member 230 may be connected (or bonded) to the center (or exact center) of the vibration element 210, excluding the edge portions. Since the center (or exact center) of the vibration element 210 is the center of vibration, vibration of the vibration element 210 may be efficiently transmitted to the passive vibration member 100 via the connecting member 230. The edge portions of the vibration element 210 are not connected to the connecting member 230 and / or the passive vibration member 100, and are in a cantilevered state spaced apart from the connecting member 230 and the passive vibration member 100. Therefore, during bending vibration (or flexural vibration) of the vibration element 210, vibration of the edge portions of the vibration element 210 is not suppressed (or reduced) by the connecting member 230 and / or the passive vibration member 100, and thus the vibration amplitude (or displacement amplitude) of the vibration element 210 may be increased. Furthermore, since the connecting member 230 is made of an elastic material, the vibration of the center of the vibrating element 210 is not suppressed (or reduced) by the connecting member 230, or the vibration amplitude (or displacement amplitude) of the vibrating element 210 can be further increased due to the damping of the connecting member 230. Therefore, the vibration amplitude (or displacement amplitude) of the passive vibration member 100 due to the vibration of the vibrating element 210 is increased, and thus the acoustic characteristics and sound pressure characteristics in the low frequency range generated by the vibration of the passive vibration member 100 can be further improved.

[0117] Such an apparatus or vibration apparatus 200 according to other embodiments of this specification, like the apparatus or vibration apparatus 200 shown in Figures 1 to 7, can improve the acoustic characteristics and sound pressure characteristics in the low-frequency range generated by the passive vibration member 100, and by including a connecting member 230 connected between a portion of the vibration element 210 and the passive vibration member 100, the vibration of each of the multiple active vibration members 200M, 200S can be efficiently transmitted to the passive vibration member 100 via the connecting member 230, increasing the vibration amplitude (or displacement amplitude) of the passive vibration member 100, thereby further improving the acoustic characteristics and sound pressure characteristics in the low-frequency range generated by the vibration of the passive vibration member 100.

[0118] Fig. 10 is another cross-sectional view taken along line A-A' in Fig. 1, and Fig. 11 is a diagram showing the vibration device shown in Fig. 10. Figs. 10 and 11 are diagrams showing an apparatus or a vibration device according to another embodiment of the present specification. Figs. 10 and 11 show the vibration device of the apparatus described in Figs. 1 to 9, to which a vibration transmission member is further added. Therefore, in the following description, the remaining components, excluding the vibration transmission member and its related components, are given the same reference numerals, and redundant description of these components will be omitted.

[0119] 10 and 11, a vibration device 200 according to another embodiment of the present disclosure may include a plurality of active vibration members 200M, 200S and a vibration transmission member 250. In the embodiment shown in FIG.

[0120] Each of the multiple active vibration members 200M, 200S can include a vibration element 210 and a coupling member 230.

[0121] The vibration elements 210 of each of the plurality of active vibration members 200M, 200S are substantially the same as the vibration elements 210 described with reference to FIGS. 1 to 9, and therefore, a duplicated description thereof will be omitted.

[0122] The connecting member 230 is 0 and 8 and 9, except that the connecting member 230 is connected (or bonded) to the vibration transmission member 250 instead of the passive vibration member 100. Therefore, the same reference numerals are used to denote the connecting member 230, and a duplicated description thereof will be omitted.

[0123] 10 and 11 show that the connecting member 230 is connected to or adhered to a portion of the vibration element 210 and the vibration transmission member 250, the embodiments of the present specification are not limited thereto, and similar to the connecting member 220 shown in FIG. 2, the connecting member 230 can be connected to or adhered to the entire first surface of the vibration element 210 and the vibration transmission member 250, and therefore, a redundant description thereof will be omitted.

[0124] The vibration transmission member 250 can be configured to transmit vibrations of the multiple active vibration members 200M, 200S to the passive vibration member 100. For example, the vibration transmission member 250 can vibrate (or be displaced) due to the vibrations of the multiple active vibration members 200M, 200S, thereby vibrating the passive vibration member 100. For example, the passive vibration member 100 can vibrate due to the vibrations of the vibration transmission member 250, thereby generating or outputting sound or vibration.

[0125] The vibration transmission member 250 according to the embodiment of the present specification may include a vibration transmission plate 251 and a plurality of elastic members 253 .

[0126] The vibration transmission plate 251 may be disposed on the rear surface 100a of the passive vibration member 100 and on the rear surfaces of each of the multiple active vibration members 200M, 200S. The vibration transmission plate 251 may be disposed between the rear surface 100a of the passive vibration member 100 and the support member 300, and may be commonly connected to each of the multiple active vibration members 200M, 200S. The vibration transmission plate 251 may vibrate due to the vibration of each of the multiple active vibration members 200M, 200S.

[0127] The vibration transmission plate 251 according to the embodiments of the present specification may include one or more materials including wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather, but the embodiments of the present specification are not limited thereto.

[0128] Each of the multiple elastic members 253 may be configured to transmit vibrations of the vibration transmission plate 251 to the passive vibration member 100. For example, each of the multiple elastic members 253 may be an elastic member, an elastic connecting member, a second damping member, or a second connecting member.

[0129] Each of the plurality of elastic members 253 may be disposed between the passive vibration member 100 and the vibration transmission plate 251. Each of the plurality of elastic members 253 may be coupled between the passive vibration member 100 and the vibration transmission plate 251. For example, each of the plurality of elastic members 253 may be coupled to the rear surface of the passive vibration member 100. of The passive vibration member 100 may be connected between the edge portion and the vibration transmission plate 251. For example, each of the plurality of elastic members 253 may be connected to the rear surface of the passive vibration member 100. of Edge portion and front surface of vibration transmission plate 251 of For example, each of the plurality of elastic members 253 may be connected to the rear surface of the passive vibration member 100. of It may be connected between the edge portion and the corner portion of the vibration transmission plate 251 .

[0130] Each of the plurality of elastic members 253 may include an elastic material having elasticity or stretchability. Each of the plurality of elastic members 253 may be made of an elastic body having a lower modulus of elasticity (or Young's modulus) than the vibration transmission plate 251. For example, each of the plurality of elastic members 253 may include, but is not limited to, double-sided tape, single-sided tape, or double-sided adhesive foam pads having an adhesive layer, and may include elastic pads such as rubber pads or silicone pads having an adhesive layer and capable of being compressed and restored. For example, the adhesive layer of each of the plurality of elastic members 253 may include, but is not limited to, an acrylic adhesive material having excellent adhesiveness and high hardness.

[0131] Each of the plurality of elastic members 253 transmits the vibration of the vibration transmission plate 251, which vibrates due to the vibration of each of the plurality of active vibration members 200M, 200S, to the passive vibration member 100, thereby vibrating the passive vibration member 100. Vibration transmission due to the vibration of each of the plurality of active vibration members 200M, 200S plate The vibration of the passive vibration member 100 is not suppressed (or reduced) by the elastic force of each of the plurality of elastic members 253, and the vibration of the passive vibration member 100 is not suppressed (or reduced) by the elastic force of each of the plurality of elastic members 253. As a result, the vibration of the passive vibration member 100 is not suppressed (or reduced) by the elastic force of each of the plurality of active vibration members 200M, 200S. plate The vibration of 251 can be efficiently transmitted to the passive vibration member 100 .

[0132] Vibration transmission plate 251 according to another embodiment of the present specification may include a plurality of regions (or divided regions) 251a, 251b, and 251c having different hardnesses. For example, vibration transmission plate 251 may have the greatest hardness in the central region (or center portion) and the least hardness in the region connected to connecting member 230. For example, vibration transmission plate 251 may include first region (or first divided region) 251a, at least one or more second regions (or second divided regions) 251b, and at least one or more third regions (or third divided regions) 251c.

[0133] The first region 251a may be disposed in a central region (or center) of the vibration transmission plate 251. For example, the first region 251a may overlap with the main active vibration member 200M of the multiple active vibration members 200M, 200S. For example, the first region 251a may have a first hardness.

[0134] At least one or more second regions 251b may be arranged around the first region 251a and connected to at least a portion of the first region 251a. For example, the vibration transmission plate 251 may include four second regions 251b arranged on or connected to the top, bottom, left, and right sides of the first region 251a, but the embodiments of the present specification are not limited thereto. Each of the at least one or more second regions 251b or four second regions 251b may have a second hardness that is smaller than the first hardness of the first region 251a.

[0135] At least one or more third regions 251c may be disposed in the remaining region of the vibration transmission plate 251 excluding the first region 251a and at least one or more second regions 251b. For example, at least one or more third regions 251c may be disposed around the first region 251a and connected to at least a portion of the first region 251a and at least a portion of the second region 251b. For example, the vibration transmission plate 251 may include four third regions 251c disposed diagonally from the first region 251a or between four second regions 251b, but the embodiments of the present specification are not limited thereto. Each of the at least one or more third regions 251c or four third regions 251c may have a third hardness that is lower than the first hardness of the first region 251a and the second region 251b, respectively. For example, at least one or more third regions 251c or each of the four third regions 251c may be disposed at a corner portion of the vibration transmission plate 251.

[0136] Each of the multiple elastic members 253 may be connected to the area having the smallest hardness among the multiple areas 251a, 251b, 251c of the vibration transmission plate 251. For example, each of the multiple elastic members 253 may be connected to each of the four third areas 251c of the vibration transmission plate 251.

[0137] At least one or more second regions 251b and at least one or more third regions 251c may overlap with a plurality of sub-active vibration members 200S among the plurality of active vibration members 200M, 200S.

[0138] In other embodiments of the vibration transmission plate 251 of the present specification, at least one third region 251c may include one or more materials selected from the group consisting of wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather, but the embodiments of the present specification are not limited thereto.

[0139] At least one second region 251b may include one or more materials selected from wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather, or a laminate structure of one or more selected materials, so as to have a second hardness greater than the third hardness of the third region 251c, but the embodiments of the present specification are not limited thereto. For example, at least one second region 251b may include a laminate structure of the same material as the third region 251c.

[0140] The first region 251a may include one or more materials selected from wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather, or may include a laminated structure of one or more selected materials, so as to have a first hardness greater than a second hardness of the second region 251b, although examples of the present specification are not limited thereto.

[0141] The vibration transmission plate 251 according to the embodiments of the present specification may include a first region 251a made of a metal material, four second regions 251b made of a plastic material, and four third regions 251c made of a paper material, but the embodiments of the present specification are not limited thereto.

[0142] In the vibration transmission plate 251 according to another embodiment of the present specification, the first region 251a overlapping the main active vibration member 200M has a relatively high hardness, and the second region 251a connected to each of the plurality of elastic members 253 has a relatively high hardness. b Since the second region 251 has a relatively small hardness, the second region 251 is easily vibrated by the vibration of each of the active vibration members 200M and 200S. b(or the corner portion) is increased, and this allows the vibration amplitude (or displacement amplitude) of the passive vibration member 100 to be further increased.

[0143] In devices according to other embodiments of the present specification, the vibration drive circuit 400 shown in Figures 4 to 7 may be configured to supply the same drive signal (DS) to each of the multiple active vibration members 200M, 200S, but the embodiments of the present specification are not limited to this.

[0144] In such a device according to another embodiment of the present specification, the vibrations of the plurality of active vibration members 200M and 200S are transmitted to a vibration transmission member 2 By transmitting the vibration signal to the passive vibration member 100 via the passive vibration member 50, the acoustic characteristics and sound pressure characteristics of the low frequency band generated by the vibration of the passive vibration member 100 can be improved.

[0145] FIG. 12A is a diagram showing a modified embodiment of the vibration transmitting member shown in FIGS. 10 and 11, and FIG. 12B is a diagram showing another modified embodiment of the vibration transmitting member shown in FIGS.

[0146] 10, 12A, and 12B, a vibration transmitting plate 251 according to a modified embodiment of the present specification can include a plurality of regions 251a, 251b, and 251c that are radially formed. The vibration transmitting plate 251 can include first to third regions 251a, 251b, and 251c that are radially formed.

[0147] The first region 251a may be disposed in a central region (or center) of the vibration transmission plate 251. The first region 251a may have a first hardness. For example, the first region 251a may have a rectangular or circular shape, but examples of the present specification are not limited thereto. For example, the first region 251a may have an elliptical shape. The first region 251a may be vibrated by the vibration of the main active vibration member 200M among the plurality of active vibration members 200M, 200S.

[0148] The second region 251b may be connected or coupled to the first region 251a while surrounding the first region 251a. The second region 251b may have a second hardness that is less than the first hardness. For example, the second region 251b may have a rectangular or circular shape, but the embodiments of the present specification are not limited thereto. For example, the second region 251b may have an elliptical shape. The second region 251b may vibrate due to the vibration of at least one or more sub-active vibration members 200S among the multiple active vibration members 200M, 200S. For example, the second region 251b may be vibrated due to the vibration of a multiple of two or a multiple of four sub-active vibration members 200S.

[0149] The third region 251c may be bonded or connected to the second region 251b while surrounding the second region 251b. The third region 251c may have a third hardness that is smaller than the first hardness and the second hardness. For example, the third region 251c may have a rectangular or circular shape, although examples herein are not limited thereto. For example, the third region 251c may have an elliptical shape. For example, the third region 251c may be vibrated by vibration of a multiple of two or a multiple of four sub active vibration members 200S.

[0150] The third region 251c of the vibration transmitting plate 251 can be connected to the passive vibration member 100 via each of the plurality of elastic members 253.

[0151] The vibration device 200 or device including the vibration transmission plate 251 according to the modified embodiment of this specification transmits the vibrations of the plurality of active vibration members 200M, 200S to the vibration transmission member 200M. 2 By transmitting the vibration signal to the passive vibration member 100 via the passive vibration member 50, the acoustic characteristics and sound pressure characteristics of the low frequency band generated by the vibration of the passive vibration member 100 can be improved.

[0152] 13A to 13L are diagrams showing various examples of drive signals for a vibration device according to an embodiment of the present specification, and FIG. 13M is a diagram showing drive signals for a vibration device according to an experimental example. In FIG. 13A to 13M, the numbers in the squares indicate the amplitude of the drive signal applied to the active vibration member.

[0153] Referring to Figures 5 and 13A, according to the driving signal of the first embodiment of this specification, the main active vibration member 200M and the first to eighth sub active vibration members 200S1 to 200S8 can each vibrate (or displace) by a first positive polarity driving signal (PDS1) having a first amplitude (A1).

[0154] Referring to Figures 5 and 13B, according to the drive signal of the second embodiment of this specification, the main active vibration member 200M does not vibrate because the main drive signal is not supplied, and each of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0155] Referring to Figures 5 and 13C, according to the drive signal of the third embodiment of this specification, the main active vibration member 200M can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1), and each of the first to eighth sub active vibration members 200S1 to 200S8 does not vibrate because the corresponding sub drive signal is not supplied.

[0156] Referring to Figures 5 and 13D, according to the drive signal of the fourth embodiment of this specification, the main active vibration member 200M can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1), and each of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0157] Referring to Figures 5 and 13E, according to the drive signal of the fifth embodiment of this specification, the main active vibration member 200M can vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2), and each of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0158] Referring to Figures 5 and 13F, according to the drive signal of the sixth embodiment of this specification, the main active vibration member 200M vibrates by a first positive polarity drive signal (PDS1) having a first amplitude (A1), some (or a first group) of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by the first positive polarity drive signal (PDS1) having the first amplitude (A1), and the remainder (or a second group) of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0159] For example, the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8 constitute a first group and can be vibrated by a first positive drive signal (PDS1) having a first amplitude (A1). For example, the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7 constitute a second group and can be vibrated by a second positive drive signal (PDS2) having a second amplitude (A2).

[0160] According to the embodiment of the present specification, each of the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8, which are arranged to form an "X" shape with the main active vibration member 200M among the first to eighth sub active vibration members 200S1 to 200S8, can be vibrated by a sub drive signal having the same phase and amplitude as the main drive signal applied to the main active vibration member 200M. Furthermore, each of the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7, which are arranged to form a "+" shape with the main active vibration member 200M among the first to eighth sub active vibration members 200S1 to 200S8, can be vibrated by a sub drive signal having the same phase and half the amplitude of the main drive signal applied to the main active vibration member 200M.

[0161] Referring to Figures 5 and 13G, according to the drive signal of the seventh embodiment of this specification, the main active vibration member 200M vibrates by a second positive polarity drive signal (PDS2) having a second amplitude (A2), some (or a first group) of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by the second positive polarity drive signal (PDS2) having the second amplitude (A2), and the remaining (or a second group) of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0162] For example, the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8 each constitute a first group and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2). For example, the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7 each constitute a second group and can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0163] According to the embodiment of the present specification, among the first to eighth sub active vibration members 200S1 to 200S8, the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7, which are arranged to form a "+" shape with the main active vibration member 200M, can be vibrated by a sub drive signal having the same phase and twice the amplitude of the main drive signal applied to the main active vibration member 200M. And among the first to eighth sub active vibration members 200S1 to 200S8, the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8, which are arranged to form an "X" shape with the main active vibration member 200M, can be vibrated by a sub drive signal having the same phase and the same amplitude as the main drive signal applied to the main active vibration member 200M.

[0164] Referring to Figures 5 and 13H, according to the drive signal of the eighth embodiment of this specification, the main active vibration member 200M can vibrate by a first negative polarity drive signal (NDS1) having a first amplitude (A1), and each of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0165] Referring to Figures 5 and 13I, according to the drive signal of the ninth embodiment of this specification, the main active vibration member 200M vibrates by a second negative polarity drive signal (NDS2) having a second amplitude (A2), some (or a first group) of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2), and the remainder (or a second group) of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0166] For example, the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8 each constitute a first group and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2). For example, the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7 each constitute a second group and can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0167] Referring to Figures 5 and 13J, according to the drive signal of the 10th embodiment of this specification, the main active vibration member 200M vibrates by a first positive polarity drive signal (PDS1) having a first amplitude (A1), some (or a first group) of the first to eighth sub active vibration members 200S1 to 200S8 can be vibrated by a fifth positive polarity drive signal (PDS5) having a fifth amplitude (A5), and the remainder (or a second group) of the first to eighth sub active vibration members 200S1 to 200S8 can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0168] For example, the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8 each constitute a first group and can be vibrated by a fifth positive drive signal (PDS5) having a fifth amplitude (A5). For example, the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7 each constitute a second group and can be vibrated by a second positive drive signal (PDS2) having a second amplitude (A2).

[0169] Referring to Figures 5 and 13K, according to the drive signal of the 11th embodiment of this specification, the main active vibration member 200M can vibrate by a second negative polarity drive signal (NDS2) having a second amplitude (A2), and each of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0170] 5 and 13L, according to the driving signal of the twelfth embodiment of the present specification, the main active vibration member 200M receives a second negative driving signal (NDS) having a second amplitude (A2). 2 ), and some of the first to eighth sub active vibration members 200S1 to 200S8 are vibrated by a second negative polarity drive signal (NDS 2 ), and the rest of the first to eighth sub active vibration members 200S1 to 200S8 can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2). For example, each of the first, third, sixth, and eighth sub active vibration members 200S1, 200S3, 200S6, and 200S8 can be vibrated by a second negative polarity drive signal (NDS 2 For example, each of the second, fourth, fifth, and seventh sub active vibration members 200S2, 200S4, 200S5, and 200S7 can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0171] Referring to Figures 5 and 13M, according to the driving signals of the experimental example, the main active vibration member 200M can vibrate by a first negative polarity driving signal (NDS1) having a first amplitude (A1), and each of the first to eighth sub active vibration members 200S1 to 200S8 can vibrate by a second positive polarity driving signal (PDS2) having a second amplitude (A2).

[0172] 14A to 14F are diagrams showing various embodiments of the drive signal of a vibration device according to another embodiment of the present specification. In Fig. 14A to 14F, the numbers shown in the squares indicate the amplitude of the drive signal applied to the active vibration member, and the dotted lines indicate the maximum vibration amplitude (or displacement amplitude) in the vibration region of the passive vibration member vibrating due to the vibration of the vibration device 200.

[0173] Referring to Figures 14A to 14F, a vibration device 200 according to another embodiment of the present specification may include 25 active vibration members 200M, 200S1 to 200S24 arranged in a 5x5 configuration, and the active vibration members 200M arranged in 3 rows and 3 columns (3, 3) in the 5x5 configuration may be set as the main active vibration member 200M, and the remaining active vibration members 200S1 to 200S24 may be set as the 1st to 24th sub-active vibration members 200S1 to 200S24, respectively. At least one of the phases and amplitudes of the sub-drive signals applied to each of the first to twenty-fourth sub-active vibration members 200S1 to 200S24 can be set or varied so that the vibration width (or vibration intensity) in the vibration region of the passive vibration member is symmetrical around the main active vibration member 200M in one of the following shapes: a "+" shape, a " / " shape, a "*" shape, an "X" shape, a combination of "X" and "━" shapes, a combination of "+" and "X" shapes, and a left-right mirrored shape of a " / " shape.

[0174] Referring to Figures 5 and 14A, the sub-drive signals applied to each of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can be set or varied so that the vibration amplitude (or vibration intensity) in the vibration region of the passive vibration member is symmetrical in an "X" shape around the main active vibration member 200M.

[0175] According to the driving signal of the thirteenth embodiment of this specification, the main driving signal applied to the main active vibration member 200M has a first amplitude (A1), and the sub-driving signals of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can have amplitudes that are symmetrical in an "X" shape around the main active vibration member 200M.

[0176] For example, the main active oscillatory member 200M can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0177] For example, each of the first, fifth, eighth, twelfth, thirteenth, seventeenth, twentieth, and twenty-fourth sub active vibration members 200S1, 200S5, 200S8, 200S12, 200S13, 200S17, 200S20, and 200S24 constitutes a first subgroup and can be vibrated by a third positive polarity drive signal (PDS3) having a third amplitude (A3).

[0178] For example, each of the second, fourth, sixth, tenth, fifteenth, nineteenth, twenty-first, and twenty-third sub active vibration members 200S2, 200S4, 200S6, 200S10, 200S15, 200S19, 200S21, and 200S23 constitutes a second subgroup and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0179] For example, the third, eleventh, fourteenth, and twenty-second sub active vibration members 200S3, 200S11, 200S14, and 200S22 each constitute a third subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0180] For example, the seventh, ninth, sixteenth, and eighteenth sub active vibration members 200S7, 200S9, 200S16, and 200S18 each constitute a fourth subgroup and can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0181] Referring to Figures 5 and 14B, the sub-drive signals applied to each of the first to twenty-fourth sub-active vibration members 200S1 to 200S24 can be set or varied so that the vibration amplitude (or vibration intensity) in the vibration region of the passive vibration member is symmetrical in the left-right reversed shape of a " / " letter around the main active vibration member 200M.

[0182] According to the drive signal of the 14th embodiment of this specification, the main drive signal applied to the main active vibration member 200M has a first amplitude (A1), and the sub-drive signals of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can have amplitudes that are symmetrical in the left-right inverted shape of a " / " letter around the main active vibration member 200M.

[0183] For example, the main active oscillatory member 200M can be vibrated by a first positive drive signal (PDS1) having a first amplitude (A1).

[0184] For example, each of the first, seventh, eighteenth, and twenty-fourth sub active vibration members 200S1, 200S7, 200S18, and 200S24 constitutes a first subgroup and can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0185] For example, each of the second, third, sixth, eighth, ninth, eleventh, twelfth, thirteenth, fourteenth, sixteenth, seventeenth, nineteenth, twenty-second, and twenty-third sub active vibration members 200S2, 200S3, 200S6, 200S8, 200S9, 200S11, 200S12, 200S13, 200S14, 200S16, 200S17, 200S19, 200S22, and 200S23 constitutes a second subgroup and can be vibrated by a third positive polarity drive signal (PDS3) having a third amplitude (A3).

[0186] For example, each of the fourth, fifth, tenth, fifteenth, twentieth, and twenty-first sub-active vibration members 200S4, 200S5, 200S10, 200S15, 200S20, and 200S21 constitutes a third subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0187] Referring to Figures 5 and 14C, the sub-drive signals applied to each of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can be set or varied so that the vibration amplitude (or vibration intensity) in the vibration region of the passive vibration member is symmetrical in the shape of a " / " around the main active vibration member 200M.

[0188] According to the driving signal of the 15th embodiment of this specification, the main driving signal applied to the main active vibration member 200M has a first amplitude (A1), and the sub-driving signals of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can have amplitudes that are symmetrical in the shape of a " / " around the main active vibration member 200M.

[0189] For example, the main active oscillatory member 200M can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0190] For example, each of the first, second, sixth, nineteenth, twenty-third, and twenty-fourth sub-active vibration members 200S1, 200S2, 200S6, 200S19, 200S23, and 200S24 constitutes a first subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0191] For example, each of the third, fourth, seventh, eighth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, seventeenth, eighteenth, twenty-first, and twenty-second sub active vibration members 200S3, 200S4, 200S7, 200S8, 200S10, 200S11, 200S12, 200S13, 200S14, 200S15, 200S17, 200S18, 200S21, and 200S22 constitutes a second subgroup and can be vibrated by a third positive polarity drive signal (PDS3) having a third amplitude (A3).

[0192] For example, the fifth, ninth, sixteenth, and twentieth sub active vibration members 200S5, 200S9, 200S16, and 200S20 each constitute a third subgroup and can be vibrated by a drive signal (PDS1) of a first positive polarity having a first amplitude (A1).

[0193] 5 and 14D, the sub-driving signals applied to the first to twenty-fourth sub active vibration members 200S1 to 200S24 respectively have vibration amplitudes (or vibration intensities) in the vibration regions of the passive vibration members. Or the strength of the vibration ) can be set symmetrically in the shape of a combination of "x" and "-" around the main active vibration member 200M, or can be varied.

[0194] According to the drive signal of the 16th embodiment of this specification, the main drive signal applied to the main active vibration member 200M has a first amplitude (A1), and the sub-drive signals of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can have amplitudes that are symmetrical in the shape of a combination of an "X" and a "━" around the main active vibration member 200M.

[0195] For example, the main active oscillatory member 200M can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0196] For example, each of the first, fifth, seventh, ninth, sixteenth, eighteenth, twentieth, and twenty-fourth sub-active vibration members 200S1, 200S5, 200S7, 200S9, 200S16, 200S18, 200S20, and 200S24 constitutes a first subgroup and can be vibrated by a third positive polarity drive signal (PDS3) having a third amplitude (A3).

[0197] For example, each of the second, fourth, sixth, eighth, tenth, fifteenth, seventeenth, nineteenth, twenty-first, and twenty-third sub active vibration members 200S2, 200S4, 200S6, 200S8, 200S10, 200S15, 200S17, 200S19, 200S21, and 200S23 constitutes a second subgroup and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0198] For example, the third and twenty-second sub active vibration members 200S3 and 200S22 each constitute a fourth subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0199] For example, each of the eleventh, twelfth, thirteenth, and fourteenth sub active vibration members 200S11, 200S12, 200S13, and 200S14 constitutes a fifth subgroup and can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0200] 5 and 14E, the sub-driving signals applied to the first to twenty-fourth sub active vibration members 200S1 to 200S24 respectively have a vibration amplitude (or vibration intensity) in the vibration region of the passive vibration member. Or the strength of the vibration ) can be set symmetrically in the shape of a "*" around the main active vibration member 200M, or can be varied.

[0201] According to the driving signal of the 17th embodiment of this specification, the main driving signal applied to the main active vibration member 200M has a first amplitude (A1), and each of the sub-driving signals of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can have an amplitude that is symmetrical in a "*" shape around the main active vibration member 200M.

[0202] For example, the main active oscillatory member 200M can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0203] For example, each of the first, third, fifth, eleventh, fourteenth, twentieth, twenty-second, and twenty-fourth sub active vibration members 200S1, 200S3, 200S5, 200S11, 200S14, 200S20, 200S22, and 200S24 constitutes a first subgroup and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0204] For example, each of the second, fourth, sixth, tenth, fifteenth, nineteenth, twenty-first, and twenty-third sub-active vibration members 200S2, 200S4, 200S6, 200S10, 200S15, 200S19, 200S21, and 200S23 constitutes a second subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0205] For example, each of the seventh, eighth, ninth, twelfth, thirteenth, sixteenth, seventeenth, and eighteenth sub-active vibration members 200S7, 200S8, 200S9, 200S12, 200S13, 200S16, 200S17, and 200S18 constitutes a third subgroup and can be vibrated by a third positive polarity drive signal (PDS3) having a third amplitude (A3).

[0206] 5 and 14F, the sub-driving signals applied to the first to twenty-fourth sub active vibration members 200S1 to 200S24 are respectively generated in the vibration ranges of the passive vibration members. in The vibration amplitude (or vibration intensity) can be set symmetrically in a "+" shape around the main active vibration member 200M, or can be varied.

[0207] According to the driving signal of the 18th embodiment of this specification, the main driving signal applied to the main active vibration member 200M has a first amplitude (A1), and the sub-driving signals of the first to twenty-fourth sub active vibration members 200S1 to 200S24 can have amplitudes that are symmetrical in a "+" shape around the main active vibration member 200M.

[0208] For example, the main active oscillatory member 200M can be vibrated by a first positive polarity drive signal (PDS1) having a first amplitude (A1).

[0209] For example, each of the first, second, fourth, fifth, sixth, tenth, fifteenth, nineteenth, twentieth, twenty-first, twenty-third, and twenty-fourth sub active vibration members 200S1, 200S2, 200S4, 200S5, 200S6, 200S10, 200S15, 200S19, 200S20, 200S21, 200S23, and 200S24 constitutes a first subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0210] For example, each of the third, seventh, ninth, eleventh, fourteenth, sixteenth, eighteenth, and twenty-second sub active vibration members 200S3, 200S7, 200S9, 200S11, 200S14, 200S16, 200S18, and 200S22 constitutes a second subgroup and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0211] For example, the eighth, twelfth, thirteenth, and seventeenth sub active vibration members 200S8, 200S12, 200S13, and 200S17 each constitute a third subgroup and have a third amplitude (A3). 3 It can be vibrated by a positive polarity drive signal (PDS3).

[0212] 15 is a diagram showing a circular arrangement of multiple active vibration members according to another embodiment of the present specification. In FIG. 15, the numbers in the squares indicate the amplitude of the drive signal applied to the active vibration members.

[0213] 5 and 15, a vibration device 200 according to another embodiment of the present specification may include a plurality of active vibration members 200M, 200S1 to 200S16 that are regularly arranged based on the vibration displacement characteristics (or vibration intensity characteristics or vibration characteristics) of the passive vibration member 100. For example, the vibration device 200 may include a main active vibration member 200M and a plurality of sub active vibration members 200S1 to 200S16 that are regularly arranged around the main active vibration member 200M based on the vibration displacement characteristics (or vibration intensity characteristics or vibration characteristics) of the passive vibration member 100. For example, the vibration device 200 may include a main active vibration member 200M and first to sixteenth sub active vibration members 200S1 to 200S16.

[0214] The passive vibration member 100 may include a main vibration region due to vibration of the main active vibration member 200M and multiple sub-vibration regions due to vibration of the multiple sub active vibration members 200S. Each of the multiple sub-vibration regions may surround the main vibration region. The main vibration region and each of the multiple sub-vibration regions may have a circular shape, but the embodiments of the present specification are not limited thereto and may have an elliptical shape. The main vibration region and each of the multiple sub-vibration regions may have a concentric circular shape. For example, the passive vibration member 100 may include a first vibration region (VA1), a second vibration region (VA2) surrounding the first vibration region (VA1), a third vibration region (VA3) surrounding the second vibration region (VA2), and a fourth vibration region (VA4) surrounding the third vibration region (VA3). For example, the first vibration region (VA1) may be the main vibration region, and the second vibration region (VA2) may have a concentric circular shape. ~ No. 4 Vibration area (VA2 , VA3 , VA4 ) may be a sub-vibration region or an auxiliary vibration region.

[0215] The main active vibration member 200M is disposed in the first vibration area (VA1) of the passive vibration member 100, and can be vibrated by a first positive polarity driving signal (PDS1) having a first amplitude (A1).

[0216] The first to sixteenth sub active vibration members 200S1 to 200S16 may be arranged in the second vibration area (VA2) to the fourth vibration area (VA4) based on the vibration displacement characteristics (or vibration intensity characteristics or vibration characteristics) of the passive vibration member 100. For example, the first to sixteenth sub active vibration members 200S1 to 200S16 may include first to fourth subgroups or may be grouped into first to fourth subgroups, and the plurality of sub active vibration members included in each of the first to fourth subgroups may be regularly distributed and arranged in each of the third and fourth vibration areas (VA3, VA4) based on the vibration displacement characteristics (or vibration intensity characteristics or vibration characteristics) of the passive vibration member 100. For example, the first to sixteenth sub active vibration members 200S1 to 200S16 may be arranged in the second to fourth vibration regions (VA2 to VA4) to form "+" and "X" shapes with the main active vibration member 200M at the center.

[0217] The first, third, fourteenth, and sixteenth sub active vibration members 200S1, 200S3, 200S14, and 200S16 may be arranged in a fourth vibration area (VA4) diagonally positioned around the main active vibration member 200M. For example, the first, third, fourteenth, and sixteenth sub active vibration members 200S1, 200S3, 200S14, and 200S16 may be arranged in an "X" shaped position around the main active vibration member 200M. For example, each of the first, third, fourteenth, and sixteenth sub active vibration members 200S1, 200S3, 200S14, and 200S16 constitutes a first subgroup and can be vibrated by a fourth positive drive signal (PDS4) having a fourth amplitude (A4).

[0218] The second, seventh, tenth, and fifteenth sub active vibration members 200S2, 200S7, 200S10, and 200S15 may be arranged in a fourth vibration area (VA4) located in the up, down, left, and right directions of the main active vibration member 200M. For example, the second, seventh, tenth, and fifteenth sub active vibration members 200S2, 200S7, 200S10, and 200S15 may be arranged in a "+" shaped position around the main active vibration member 200M. For example, each of the second, seventh, tenth, and fifteenth sub active vibration members 200S2, 200S7, 200S10, and 200S15 constitutes a second subgroup and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0219] The fourth, sixth, eleventh, and thirteenth sub active vibration members 200S4, 200S6, 200S11, and 200S13 may be arranged in a third vibration area (VA3) diagonally around the main active vibration member 200M. For example, the fourth, sixth, eleventh, and thirteenth sub active vibration members 200S4, 200S6, 200S11, and 200S13 may be arranged in an "X"-shaped position around the main active vibration member 200M. For example, each of the fourth, sixth, eleventh, and thirteenth sub active vibration members 200S4, 200S6, 200S11, and 200S13 constitutes a third subgroup and can be vibrated by a third positive drive signal (PDS3) having a third amplitude (A3).

[0220] The fifth, eighth, ninth, and twelfth sub active vibration members 200S5, 200S8, 200S9, and 200S12 may be arranged in a third vibration area (VA3) located in the up, down, left, and right directions of the main active vibration member 200M. For example, the fifth, eighth, ninth, and twelfth sub active vibration members 200S5, 200S8, 200S9, and 200S12 may be arranged in a "+" shaped position around the main active vibration member 200M. For example, each of the fifth, eighth, ninth, and twelfth sub active vibration members 200S5, 200S8, 200S9, and 200S12 constitutes a fourth subgroup and can be vibrated by a fourth positive polarity drive signal (PDS4) having a fourth amplitude (A4).

[0221] Such an apparatus or vibration device 200 according to another embodiment of this specification includes a plurality of active vibration members 200M, 200S1 to 200S16 arranged regularly based on the vibration displacement characteristics (or vibration intensity characteristics or vibration characteristics) of the passive vibration member 100, and by varying (or changing) the sub-drive signals applied to the plurality of sub-active vibration members 200S1 to 200S16 (or the first to fourth sub-groups) differently from the main drive signal (MDS) so as to be optimized for the vibration displacement characteristics (or vibration intensity characteristics or vibration characteristics) of the passive vibration member 100, the acoustic characteristics and sound pressure characteristics of the low-frequency band generated by the passive vibration member 100 can be further improved.

[0222] Figure 16 is a diagram showing a circular arrangement structure of multiple active vibration members according to another embodiment of the present specification. In Figure 16, the positions of the multiple sub-active vibration members shown in Figure 15 are changed. Therefore, in the description of Figure 16, only the positions of the multiple sub-active vibration members will be described. In Figure 16, the numbers shown in the squares indicate the amplitude of the drive signal applied to the active vibration member.

[0223] 5 and 16, the first to sixteenth sub active vibration members 200S1 to 200S16 according to other embodiments of the present specification may be irregularly arranged around the main active vibration member 200M based on the vibration displacement characteristics (or vibration intensity characteristics, or vibration characteristics) of the passive vibration member 100. For example, the first to sixteenth sub active vibration members 200S1 to 200S16 may include first to third subgroups or may be grouped into first to third subgroups, and the plurality of sub active vibration members included in each of the first to third subgroups may be divided into third and fourth vibration regions (VA3) based on the vibration displacement characteristics (or vibration intensity characteristics, or vibration characteristics) of the passive vibration member 100. , VA4) can be irregularly distributed among them.

[0224] The first, second, third, seventh, tenth, fifteenth, and sixteenth sub active vibration members 200S1, 200S2, 200S3, 200S7, 200S10, 200S15, and 200S16 are arranged in areas of the fourth vibration region (VA4) where the vibration displacement characteristics are relatively small, and thus can be arranged irregularly in the fourth vibration region (VA4). For example, the first, second, third, seventh, tenth, fifteenth, and sixteenth sub active vibration members 200S1, 200S 2 , 200S3, 200S7, 200S10, 200S15, and 200S16 constitute a first subgroup and can be vibrated by a second positive polarity drive signal (PDS2) having a second amplitude (A2).

[0225] The fourth, sixth, eleventh, and fourteenth sub active vibration members 200S4, 200S6, 200S11, and 200S14 may be arranged in a region of the third vibration region (VA3) where the vibration displacement characteristics are relatively large. For example, the fourth, sixth, eleventh, and fourteenth sub active vibration members 200S4, 200S6, 200S11, and 200S14 each constitute a second subgroup and can be vibrated by a fourth positive drive signal (PDS4) having a fourth amplitude (A4).

[0226] The fifth, eighth, ninth, twelfth, and thirteenth sub active vibration members 200S5, 200S8, 200S9, 200S12, and 200S13 may be arranged in a region of the third vibration region (VA3) that has a relatively small vibration displacement characteristic. For example, the fifth, eighth, ninth, twelfth, and thirteenth sub active vibration members 200S5, 200S8, 200S9, 200S12, and 200S13 each constitute a third subgroup and can be vibrated by a third positive polarity drive signal (PDS3) having a third amplitude (A3).

[0227] Such an apparatus or vibration device 200 according to another embodiment of this specification includes a plurality of active vibration members 200M, 200S1 to 200S16 arranged irregularly based on the vibration displacement characteristics (or vibration intensity characteristics, or vibration characteristics) of the passive vibration member 100, and by varying (or changing) the sub-drive signals applied to the plurality of sub-active vibration members 200S1 to 200S16 (or the first to third sub-groups) to be different from the main drive signal (MDS) so as to optimize them for the vibration displacement characteristics (or vibration intensity characteristics) or vibration characteristics of the passive vibration member 100, the acoustic characteristics and sound pressure characteristics of the low-frequency band generated by the passive vibration member 100 can be further improved.

[0228] Fig. 17 is a graph showing acoustic output characteristics due to the drive signals according to the first to third examples of the present specification shown in Fig. 13A to Fig. 13C. In Fig. 17, the thick solid line shows the acoustic output characteristics due to the drive signal according to the first example of the present specification shown in Fig. 13A, the solid line shows the acoustic output characteristics due to the drive signal according to the second example of the present specification shown in Fig. 13B, and the dotted line shows the acoustic output characteristics due to the drive signal according to the third example of the present specification shown in Fig. 13C.

[0229] 5, 13A to 13C, and 17, it can be seen that the thick solid line indicates an increase in sound pressure at 1 kHz or less compared to the solid line, and that the thick solid line indicates a large increase in sound pressure at 1 kHz or less compared to the dotted line.

[0230] According to the embodiments of the present specification, as shown in Fig. 13A, a plurality of sub active vibration members 200S arranged around a main active vibration member 200M can be controlled to vibrate by the same drive signal as the main active vibration member 200M, thereby improving the acoustic characteristics and sound pressure characteristics in the low frequency range generated by the passive vibration members. Therefore, the drive signals according to the first and second embodiments of the present specification can be applied as drive signals for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the low frequency range. And, the drive signal according to the third embodiment of the present specification can be applied as drive signals for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the high frequency range.

[0231] Fig. 18 is a graph showing the acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to the first example of this specification shown in Fig. 13A. In Fig. 18, the thick solid line shows the acoustic output characteristics when the passive vibration member is made of a plastic material, the solid line shows the acoustic output characteristics when the passive vibration member is made of a paper material, and the dotted line shows the acoustic output characteristics when the passive vibration member is made of a metal material.

[0232] 5, 13A, and 18, it can be seen that the thick solid line indicates an increase in sound pressure at approximately 100 Hz to 500 Hz and above 1 kHz compared to the solid line and dotted line, respectively. It can also be seen that the solid line indicates an increase in sound pressure at approximately 700 Hz or above compared to the dotted line.

[0233] According to another embodiment of the present specification, when the passive vibration member is made of plastic, the multiple sub-active vibration members 200S arranged around the main active vibration member 200M can be controlled to vibrate by the same drive signal as the main active vibration member 200M, thereby improving the acoustic characteristics and sound pressure characteristics in the range of 200 Hz to 550 Hz generated by the passive vibration member. Therefore, the drive signal according to the first embodiment of the present specification can be applied as the drive signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the range of approximately 100 Hz to 500 Hz and above 1 kHz generated by the vibration of a passive vibration member made of plastic. Furthermore, the drive signal according to the first embodiment of the present specification can be applied as the drive signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the range of approximately 700 Hz and above generated by the vibration of a passive vibration member made of paper.

[0234] Fig. 19 is a graph showing acoustic output characteristics due to drive signals according to the first, fourth, and fifth examples of the present specification shown in Fig. 13A, Fig. 13D, and Fig. 13E. In Fig. 19, the thick solid line shows the acoustic output characteristics due to the drive signal according to the fourth example of the present specification shown in Fig. 13D, the solid line shows the acoustic output characteristics due to the drive signal according to the fifth example of the present specification shown in Fig. 13E, and the dotted line shows the acoustic output characteristics due to the drive signal according to the first example of the present specification shown in Fig. 13A.

[0235] 5, 13A, 13D, 13E, and 19, it can be seen that the thick solid line indicates an increase in sound pressure at approximately 110 Hz to 250 Hz compared to the solid line and dotted line, respectively.

[0236] According to another embodiment of the present specification, as shown in FIG. 13D , the main active vibration member 200M can be controlled to vibrate by a first positive drive signal (PDS1) having a first amplitude (A1), and each of the first to eighth sub active vibration members 200S1 to 200S8 can be controlled to vibrate by a second positive drive signal (PDS2) having a second amplitude (A2), thereby improving the acoustic characteristics and sound pressure characteristics in the range of approximately 110 Hz to 250 Hz generated by the passive vibration members. Therefore, the drive signal according to the fourth embodiment of the present specification can be applied as the drive signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the range of approximately 110 Hz to 250 Hz. Furthermore, the drive signals according to the first, fourth, and fifth embodiments can be applied as the drive signals for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics above 250 Hz.

[0237] Fig. 20 is a graph showing the acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to Example 4 of this specification shown in Fig. 13D. In Fig. 20, the thick solid line shows the acoustic output characteristics when the passive vibration member is made of plastic material, the solid line shows the acoustic output characteristics when the passive vibration member is made of paper material, and the dotted line shows the acoustic output characteristics when the passive vibration member is made of metal material.

[0238] 5, 13D, and 20, the thick solid line indicates that the sound pressure is increased between approximately 180 Hz and 550 Hz and at approximately 1.1 kHz or higher compared to the solid and dotted lines, respectively. The solid line indicates that the sound pressure is increased below approximately 130 Hz and above approximately 700 Hz compared to the dotted line.

[0239] According to another embodiment of the present specification, when the passive vibration member is made of plastic, the sub-drive signal applied to each of the multiple sub-active vibration members 200S arranged around the main active vibration member 200M can be controlled to have a second amplitude (A2) smaller than the first amplitude (A1) of the main drive signal applied to the main active vibration member 200M, thereby improving the acoustic characteristics and sound pressure characteristics in the range of about 180 Hz to 550 Hz generated by the passive vibration member. Therefore, the drive signal according to the fourth embodiment of the present specification can be applied as a drive signal for the vibration device 200 to improve the sound pressure in the range of about 180 Hz to 550 Hz generated by the vibration of a passive vibration member made of plastic, and the acoustic characteristics and sound pressure characteristics above about 1.1 kHz. Furthermore, the drive signal according to the fourth embodiment of the present specification can be applied as a drive signal for the vibration device 200 to improve the sound pressure below about 130 Hz and the acoustic characteristics and sound pressure characteristics above about 700 Hz generated by the vibration of a passive vibration member made of paper.

[0240] Fig. 21 is a graph showing acoustic output characteristics due to drive signals according to the first, sixth, and seventh examples of the present specification shown in Fig. 13A, Fig. 13F, and Fig. 13G. In Fig. 21, the thick solid line shows the acoustic output characteristics due to the drive signal according to the seventh example of the present specification shown in Fig. 13G, the solid line shows the acoustic output characteristics due to the drive signal according to the sixth example of the present specification shown in Fig. 13F, and the dotted line shows the acoustic output characteristics due to the drive signal according to the first example of the present specification shown in Fig. 13A.

[0241] 5, 13A, 13F, 13G, and 21, it can be seen that the thick solid line and the solid line each have increased sound pressure at approximately 110 Hz to 250 Hz and approximately 440 Hz to 900 Hz compared to the dotted line.

[0242] According to another embodiment of the present specification, as shown in FIG. 13F, the main active vibration member 200M can be controlled to vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1), some of the first to eighth sub active vibration members 200S1 to 200S8 can be controlled to vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1), and the remaining parts of the first to eighth sub active vibration members 200S1 to 200S8 can be controlled to vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2), thereby improving the acoustic characteristics and sound pressure characteristics generated by the passive vibration members at approximately 110 Hz to 250 Hz and approximately 440 Hz to 900 Hz.

[0243] According to another embodiment of the present specification, as shown in FIG. 13G, the main active vibration member 200M can be controlled to vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2), some of the first to eighth sub active vibration members 200S1 to 200S8 can be controlled to vibrate by a first positive polarity drive signal (PDS1) having a first amplitude (A1), and the remaining parts of the first to eighth sub active vibration members 200S1 to 200S8 can be controlled to vibrate by a second positive polarity drive signal (PDS2) having a second amplitude (A2), thereby improving the acoustic characteristics and sound pressure characteristics at approximately 110 Hz to 250 Hz and approximately 440 Hz to 900 Hz generated by the passive vibration member.

[0244] Therefore, the drive signals according to the sixth and seventh embodiments of the present specification can be applied as drive signals for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the range of approximately 110 Hz to 250 Hz and approximately 440 Hz to 900 Hz, respectively. The drive signals according to the first, sixth, and seventh embodiments can be applied as drive signals for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics above 900 Hz.

[0245] Fig. 22 is a graph showing the acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to Example 6 of this specification shown in Fig. 13F. In Fig. 22, the thick solid line shows the acoustic output characteristics when the passive vibration member is made of plastic material, the solid line shows the acoustic output characteristics when the passive vibration member is made of paper material, and the dotted line shows the acoustic output characteristics when the passive vibration member is made of metal material.

[0246] 5, 13F, and 22, it can be seen that the thick solid line indicates an increase in sound pressure between approximately 110 Hz and 550 Hz compared to the solid line and dotted line, respectively.

[0247] According to another embodiment of the present specification, when the passive vibration member is made of plastic, the sub-driving signal applied to some of the multiple sub-active vibration members 200S arranged around the main active vibration member 200M can be controlled to have a second amplitude (A2) smaller than the first amplitude (A1) of the main driving signal applied to the main active vibration member 200M, thereby improving the acoustic characteristics and sound pressure characteristics in the range of approximately 110 Hz to 550 Hz generated by the passive vibration member. Therefore, the driving signal according to the sixth embodiment of the present specification can be applied as the driving signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the range of approximately 110 Hz to 550 Hz generated by the vibration of a passive vibration member made of plastic. Furthermore, the driving signal according to the sixth embodiment of the present specification can be applied as the driving signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics below 600 Hz generated by the vibration of a passive vibration member made of paper.

[0248] Fig. 23 is a graph showing acoustic output characteristics due to drive signals according to the first, seventh, and ninth examples of the present specification shown in Fig. 13A, Fig. 13G, and Fig. 13I. In Fig. 23, the thick solid line shows the acoustic output characteristics due to the drive signal according to the seventh example of the present specification shown in Fig. 13G, the solid line shows the acoustic output characteristics due to the drive signal according to the ninth example of the present specification shown in Fig. 13I, and the dotted line shows the acoustic output characteristics due to the drive signal according to the first example of the present specification shown in Fig. 13A.

[0249] 5, 13A, 13G, 13I, and 23, the thick solid line indicates an increase in sound pressure from approximately 110 Hz to 250 Hz and from approximately 440 Hz to 900 Hz compared to the solid line and dotted line, respectively. The solid line indicates an increase in sound pressure from approximately 430 Hz to 1 kHz compared to the dotted line.

[0250] According to another embodiment of the present specification, as described in FIG. 21, the drive signal according to the seventh embodiment of the present specification shown in FIG. 13G can be applied as a drive signal for vibration device 200 to improve the acoustic characteristics and sound pressure characteristics in the range of approximately 110 Hz to 250 Hz and approximately 440 Hz to 900 Hz.

[0251] According to another embodiment of the present specification, as shown in FIG. 13I, the main active vibration member 200M is controlled to vibrate by a second negative drive signal (NDS2) having a second amplitude (A2), some of the first to eighth sub active vibration members 200S1 to 200S8 are controlled to vibrate by a first positive drive signal (PDS1) having a first amplitude (A1), and the remaining of the first to eighth sub active vibration members 200S1 to 200S8 are controlled to vibrate by a second positive drive signal (PDS2) having a second amplitude (A2), thereby improving the acoustic characteristics and sound pressure characteristics at approximately 430 Hz to 1 kHz generated by the passive vibration members. Therefore, the drive signal according to the ninth embodiment of the present specification can be applied as a drive signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics at approximately 430 Hz to 1 kHz.

[0252] Fig. 24 is a graph showing the acoustic output characteristics depending on the material of the passive vibration member when the vibration device is driven by the drive signal according to the ninth example of the present specification shown in Fig. 13I. In Fig. 22, the thick solid line shows the acoustic output characteristics when the passive vibration member is made of a plastic material, the solid line shows the acoustic output characteristics when the passive vibration member is made of a paper material, and the dotted line shows the acoustic output characteristics when the passive vibration member is made of a metal material.

[0253] 5, 13I, and 24, the thick solid line indicates an increase in sound pressure across the entire frequency range compared to the solid and dotted lines, respectively. The solid line indicates an increase in sound pressure below 400 Hz compared to the dotted line.

[0254] According to another embodiment of the present specification, when the passive vibration member is made of a plastic material, the main driving signal applied to the main active vibration member 200M is controlled by a second negative driving signal (NDS2) having a second amplitude (A2), the sub driving signals applied to some of the first to eighth sub active vibration members 200S1 to 200S8 are controlled by a first positive driving signal (PDS1) having a first amplitude (A1), and the sub driving signals applied to the remaining parts of the first to eighth sub active vibration members 200S1 to 200S8 are controlled by a second positive driving signal (PDS2) having a second amplitude (A2), thereby improving the acoustic characteristics and sound pressure characteristics across the entire frequency range generated by the passive vibration member. Therefore, the driving signal according to the ninth embodiment of the present specification can be applied as a driving signal for the vibration device 200 to improve the acoustic characteristics and sound pressure characteristics across the entire frequency range generated by the vibration of the passive vibration member made of a plastic material. The driving signal according to the ninth embodiment of this specification is applied as a driving signal for the vibration device 200 in order to improve the acoustic characteristics and sound pressure characteristics below 400 Hz generated by the vibration of a passive vibration member made of paper material.

[0255] FIG. 25 shows the vibration characteristics when the vibration device is driven by the drive signal according to the first embodiment of the present specification shown in FIG. 13A. Spacing between multiple active vibration members25 is a graph showing the acoustic output characteristics when the spacing between the active vibration members is 25 mm, the solid line shows the acoustic output characteristics when the spacing between the active vibration members is 35 mm, and the thick solid line shows the acoustic output characteristics when the spacing between the active vibration members is 35 mm. 50 The acoustic output characteristics are shown for a configuration of 100 mm.

[0256] 5, 13A, and 25, it can be seen that the thick solid line and the solid and dotted lines have similar sound pressures below approximately 450 Hz. The thick solid line has increased sound pressure from approximately 450 Hz to 1 kHz compared to the solid and dotted lines, respectively. The dotted line has increased sound pressure from approximately 2 kHz to 8 kHz compared to the thick solid line and the solid line, respectively.

[0257] According to another embodiment of the present specification, a plurality of active vibration members driven by the drive signal according to the first embodiment of the present specification may be arranged with an interval of 25 mm to 50 mm depending on the sound frequency band to be enhanced by the device or vibration device.

[0258] Fig. 26 is a graph showing the acoustic output characteristics depending on the spacing between multiple active vibration members when the vibration device is driven by the drive signal according to the fourth embodiment of this specification shown in Fig. 13D. In Fig. 26, the dotted line shows the acoustic output characteristics when the spacing between multiple active vibration members is 25 mm, the solid line shows the acoustic output characteristics when the spacing between multiple active vibration members is 35 mm, and the thick solid line shows the acoustic output characteristics when the spacing between multiple active vibration members is 15 mm. 50 The acoustic output characteristics are shown for a configuration of 100 mm.

[0259] 5, 13D, and 26, it can be seen that the thick solid line and the solid and dotted lines have similar sound pressures below approximately 450 Hz. The thick solid line has increased sound pressure from approximately 450 Hz to 1 kHz compared to the solid and dotted lines, respectively. The dotted line has increased sound pressure from approximately 3 kHz to 8 kHz compared to the thick solid line and the solid line, respectively.

[0260] According to another embodiment of the present specification, a plurality of active vibration members driven by a drive signal according to the fourth embodiment of the present specification may be arranged with an interval of 25 mm to 50 mm depending on the sound frequency band to be enhanced by the device or vibration device.

[0261] Fig. 27 is a graph showing the acoustic output characteristics depending on the spacing between multiple active vibration members when the vibration device is driven by the drive signal according to the seventh embodiment of this specification shown in Fig. 13G. In Fig. 27, the dotted line shows the acoustic output characteristics when the spacing between multiple active vibration members is 25 mm, the solid line shows the acoustic output characteristics when the spacing between multiple active vibration members is 35 mm, and the thick solid line shows the acoustic output characteristics when the spacing between multiple active vibration members is 15 mm. 50 The acoustic output characteristics are shown for a configuration of 100 mm.

[0262] 5, 13G, and 27, it can be seen that the thick solid line indicates an increase in sound pressure from approximately 400 Hz to 1 kHz compared to the solid line and dotted line, respectively, and that the dotted line indicates an increase in sound pressure from approximately 2 kHz to 8 kHz compared to the thick solid line and solid line, respectively.

[0263] According to another embodiment of the present specification, a plurality of active vibration members driven by a drive signal according to the seventh embodiment of the present specification may be arranged with an interval of 25 mm to 50 mm depending on the sound range band to be enhanced by the device or vibration device.

[0264] 28 is a graph showing the acoustic output characteristics depending on the attachment method between each of the active vibration members and the passive vibration member when the vibration device is driven by the drive signal according to the first embodiment of this specification shown in FIG. 13A. In FIG. 28, the dotted line indicates the acoustic output characteristics when the active vibration members are attached to the passive vibration member by the full-surface attachment method as shown in FIG. Configured The thick solid line shows the acoustic output characteristics when a plurality of active vibration members are configured on a passive vibration member by the partial bonding method as shown in FIG.

[0265] 5, 13A, and 28, it can be seen that the thick solid line indicates an increase in sound pressure at approximately 1.1 kHz or less compared to the dotted line, and the dotted line indicates an increase in sound pressure at approximately 1.15 kHz or more compared to the thick solid line.

[0266] According to another embodiment of the present specification, a plurality of active vibration members driven by the drive signal according to the first embodiment of the present specification may be connected or bonded to a passive vibration member in a partial adhesive manner to enhance the sound pressure of the device or vibration device at approximately 1.1 kHz or less. Also, a plurality of active vibration members driven by the drive signal according to the first embodiment of the present specification may be connected or bonded to a passive vibration member in a full adhesive manner to enhance the sound pressure of the device or vibration device at approximately 1.15 kHz or more.

[0267] 29 is a graph showing the acoustic output characteristics of the vibration device according to the attachment method between each of the active vibration members and the passive vibration member when the vibration device is driven by the drive signal according to the seventh embodiment of the present specification shown in FIG. 13G. In FIG. 29, the dotted line indicates the acoustic output characteristics of the passive vibration member when the active vibration members are attached to the passive vibration member by the full surface attachment method as shown in FIG. Configured The thick solid line shows the acoustic output characteristics when a plurality of active vibration members are configured on a passive vibration member by the partial bonding method, as shown in FIG.

[0268] 5, 13G, and 29, it can be seen that the thick solid line indicates an increase in sound pressure at approximately 1.15 kHz or less compared to the dotted line, and the dotted line indicates an increase in sound pressure at approximately 1.15 kHz or more compared to the thick solid line.

[0269] According to another embodiment of the present specification, a plurality of active vibration members driven by the drive signal according to the seventh embodiment of the present specification may be connected or bonded to a passive vibration member in a partial adhesive manner to enhance the sound pressure of the device or vibration device at frequencies below about 1.15 kHz. Also, a plurality of active vibration members driven by the drive signal according to the seventh embodiment of the present specification may be connected or bonded to a passive vibration member in a full adhesive manner to enhance the sound pressure of the device or vibration device at frequencies above about 1.15 kHz.

[0270] Figure 30 shows the experimental example shown in Figure 13M. of 30 is a graph showing the acoustic output characteristics of the passive vibration member and each of the active vibration members when the vibration device is driven by a drive signal. In Fig. 30, the dotted line shows the acoustic output characteristics when the passive vibration member is attached with the active vibration members by the full-surface bonding method as shown in Fig. 2, and the thick solid line shows the acoustic output characteristics when the passive vibration member is attached with the active vibration members by the partial bonding method as shown in Fig. 8.

[0271] 5, 13M, and 30, it can be seen that the thick solid line increases the sound pressure below approximately 1.15 kHz compared to the dotted line. The dotted line increases the sound pressure above approximately 1.15 kHz compared to the thick solid line. However, it can be seen that the thick solid line in FIG. 30 has significantly lower sound pressure below approximately 1.15 kHz compared to the thick solid lines in FIGS. 28 and 29. Therefore, according to the examples of this specification, the driving signals of the experimental examples can further improve the acoustic characteristics and sound pressure characteristics in the low-frequency range.

[0272] The vibration device according to the embodiments of the present specification can be applied to a vibration device disposed in an apparatus. The apparatus according to the embodiments of the present specification may be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable apparatus, a foldable apparatus, a rollable apparatus, a bendable apparatus, a flexible apparatus, a curved apparatus, a sliding apparatus, a variable apparatus, an electronic organizer, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA), an MP3 player, a mobile medical device, a desktop PC, a laptop PC, a netbook computer, a workstation, a navigation system, a vehicle navigation system, a vehicle display device, a vehicle device, a theater device, a theater display device, a television, a wallpaper device, a signage device, a game device, a notebook computer, a monitor, a camera, a video camera, and a home appliance. The vibration device of the present specification may be applied to an organic light-emitting lighting device or an inorganic light-emitting lighting device. When the vibration device is applied to a lighting device, it may function as both a light source and a speaker. When the vibration device of the present specification is applied to a mobile device, it may function as one or more of a speaker, a receiver, and a haptic, but is not limited thereto.

[0273] An apparatus according to an embodiment of the present specification can be described as follows.

[0274] An apparatus according to an embodiment of the present specification includes a vibration device including a passive vibration member, a plurality of active vibration members coupled to a back surface of the passive vibration member along at least one of a first direction and a second direction intersecting the first direction, and a support member on the back surface of the passive vibration member, wherein a drive signal applied to at least one of the plurality of active vibration members can be different from a drive signal applied to the remaining active vibration members of the plurality of active vibration members.

[0275] According to some embodiments of the present specification, the drive signal applied to at least one of the plurality of active vibration members can have the same period as the drive signals applied to the remaining active vibration members of the plurality of active vibration members.

[0276] According to some embodiments of the present specification, at least one or more of the phase and amplitude of a drive signal applied to at least one of the plurality of active vibration members may be different from at least one or more of the phase and amplitude of a drive signal applied to the remaining active vibration members of the plurality of active vibration members.

[0277] According to some embodiments of the present specification, the drive signal includes a main drive signal applied to a main active vibration member arranged at the center of a vibration area of ​​a passive vibration member among the multiple active vibration members, and multiple sub-drive signals applied to each of multiple sub-active vibration members arranged around the main active vibration member among the multiple active vibration members, and at least one of the multiple sub-drive signals can be different from the main drive signal.

[0278] According to some embodiments herein, the active vibration members may be arranged at equal intervals along the first direction and the second direction.

[0279] According to some embodiments of the present disclosure, the spacing between the active vibration members arranged along the first direction and the second direction may be 25 mm to 50 mm.

[0280] According to some embodiments of the present specification, the passive vibration member includes a main vibration area and a plurality of sub-vibration areas surrounding the main vibration area, the main active vibration member is arranged in the vibration area, the plurality of sub-active vibration members include a plurality of subgroups, and the plurality of sub-active vibration members included in each of the plurality of subgroups may be regularly or irregularly arranged in each of the plurality of sub-vibration areas based on the vibration displacement characteristics of the passive vibration member.

[0281] According to some embodiments of the present specification, the sub-drive signals applied to the multiple sub-active vibration members included in each of the multiple sub-groups may be different from each other, or the sub-drive signals applied to the multiple sub-active vibration members included in each of the multiple sub-groups may be different from each other and different from the main drive signal.

[0282] An apparatus according to an embodiment of the present specification includes a vibration device including a passive vibration member, a vibration transmission member arranged on the rear surface of the passive vibration member and connected to the passive vibration member, a plurality of active vibration members connected to the vibration transmission member along at least one or more directions among a first direction and a second direction intersecting the first direction, and a support member on the rear surface of the passive vibration member, wherein a drive signal applied to at least one or more of the plurality of active vibration members can be different from a drive signal applied to the remaining active vibration members among the plurality of active vibration members.

[0283] According to some embodiments of the present specification, the drive signal includes a main drive signal applied to a main active vibration member arranged at the center of a vibration area of ​​a passive vibration member among the plurality of active vibration members, and a plurality of sub-drive signals applied to each of a plurality of sub-active vibration members arranged around the main active vibration member among the plurality of active vibration members, and at least one of the plurality of sub-drive signals can be different from the main drive signal.

[0284] According to some embodiments of the present specification, the vibration transmission member may include a vibration transmission plate connected to a plurality of active vibration members, and a connecting member connected to the vibration transmission plate and the back surface of the passive vibration member.

[0285] According to some embodiments of the present disclosure, a connecting member may be connected between a corner portion of the vibration transmission plate and a rear surface of the passive vibration member.

[0286] According to some embodiments herein, the vibration transmission plate may include multiple regions having different hardnesses.

[0287] According to some embodiments of the present disclosure, the vibration transmission plate may have the greatest hardness in a central region among the plurality of regions, and the least hardness in a region connected to the connecting member.

[0288] According to some embodiments of the present disclosure, each of the plurality of sub-drive signals and the main drive signal may have the same period.

[0289] According to some embodiments of the present specification, at least one of the phase and amplitude of the main drive signal may be the same as or different from at least one of the amplitude and phase of each of the multiple sub-drive signals.

[0290] According to some embodiments of the present disclosure, the amplitude of the main drive signal may be equal to or greater than the amplitude of at least one of the plurality of sub-drive signals.

[0291] According to some embodiments of the present disclosure, the amplitude of the main drive signal may be equal to or smaller than the amplitude of at least one of the plurality of sub-drive signals.

[0292] According to some embodiments of the present disclosure, each of the plurality of sub-drive signals may have an opposite phase to the main drive signal.

[0293] According to some embodiments of the present specification, some of the multiple sub-active vibration members constitute a first group, and the remaining multiple sub-active vibration members constitute a second group, and the sub-drive signal applied to the sub-active vibration members of the first group can be the same as or different from the main drive signal, and the sub-drive signal applied to the sub-active vibration members of the second group can be the same as or different from the main drive signal.

[0294] According to some embodiments of the present specification, the sub-active vibration members of the first group may be arranged to form an "X" shape with the main active vibration member, and the sub-active vibration members of the second group may be arranged to form a "+" shape with the main active vibration member.

[0295] According to some embodiments of the present specification, the amplitude of the main drive signal applied to the main active vibration member and the amplitude of each of the multiple sub-drive signals applied to each of the multiple sub-active vibration members may be symmetrical around the main active vibration member in any one of the following shapes: a "+" shape, a " / " shape, a "*" shape, an "X" shape, a combination of an "X" and a "━" shape, a combination of a "+" and an "X" shape, and a left-right mirrored shape of a " / " shape.

[0296] According to some embodiments of the present specification, each of the plurality of active vibration members may include a vibration element including a piezoelectric material, and a connecting member connected to at least a portion of the vibration element and connected to a back surface of the passive vibration member.

[0297] According to some embodiments herein, the connecting member may include a resilient material.

[0298] According to some embodiments of the present specification, the passive vibration member may be a display panel including a display portion having a plurality of pixels that realize an image, or may include one or more materials selected from the group consisting of wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather.

[0299] The present specification described above is not limited to the above-mentioned examples and the accompanying drawings, and it will be clear to those skilled in the art to which the present specification pertains that various substitutions, modifications, and alterations are possible within the scope of the technical idea of ​​the present specification. Therefore, the scope of the present specification is defined by the following claims, and all modifications and alterations derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present specification. [Explanation of symbols]

[0300] 100: Passive vibration member 200: Vibration device 200M: Main active vibration member 200S: Sub active vibration member 210: Vibration element 220, 230: connecting member 250: Vibration transmission member 251: Vibration transmission plate 253: Elastic member 300: Support member 350: Connecting member 400: Vibration drive circuit 410: Amplification circuit section 430: Amplification circuit 440: Signal conversion unit 450: Signal processing section

Claims

1. a passive vibration member; a vibration device including a plurality of active vibration members coupled to a rear surface of the passive vibration member along at least one of a first direction and a second direction intersecting the first direction; a support member on the back surface of the passive vibration member; Including, a drive signal applied to at least one of the plurality of active vibration members is different from drive signals applied to the remaining active vibration members of the plurality of active vibration members; The drive signal is a main driving signal applied to a main active vibration member disposed in a center of a vibration region of the passive vibration member among the plurality of active vibration members; a plurality of sub-drive signals applied to a plurality of sub-active vibration members arranged around the main active vibration member among the plurality of active vibration members; Including, At least one of the plurality of sub-drive signals is different from the main drive signal, The passive vibration member is A main vibration area; a plurality of sub-vibration areas surrounding the main vibration area; Including, the main active vibration member is disposed in the vibration region; the plurality of sub-active vibration members include a plurality of sub-groups, and the plurality of sub-active vibration members included in each of the plurality of sub-groups are regularly or irregularly arranged in each of the plurality of sub-vibration regions based on the vibration displacement characteristics of the passive vibration member; Device.

2. 10. The apparatus of claim 1, wherein the drive signal applied to at least one of the plurality of active oscillatory members has the same period as the drive signals applied to the remaining active oscillatory members of the plurality of active oscillatory members.

3. 3. The apparatus of claim 2, wherein at least one of the phase and amplitude of a drive signal applied to at least one of the plurality of active vibration members is different from at least one of the phase and amplitude of a drive signal applied to the remaining active vibration members of the plurality of active vibration members.

4. The apparatus of claim 1 , wherein the plurality of active vibration members are equally spaced along the first direction and the second direction.

5. 5. The device of claim 4, wherein the spacing between the active vibration members arranged along the first direction and the second direction is between 25 mm and 50 mm.

6. The sub-driving signals applied to the plurality of sub-active vibration members included in each of the plurality of sub-groups are different from each other, or the sub-driving signals applied to the sub-active vibration members included in each of the sub-groups are different from each other and different from the main driving signal; 10. The apparatus of claim 1.

7. The apparatus according to claim 1 , wherein each of the plurality of sub-drive signals and the main drive signal have the same period.

8. 6. The device according to claim 1, wherein at least one of the phase and amplitude of the main drive signal is the same as or different from at least one of the amplitude and phase of each of the plurality of sub-drive signals.

9. The device according to claim 1 , wherein the amplitude of the main drive signal is equal to or greater than the amplitude of at least one of the plurality of sub-drive signals.

10. The device according to claim 1 , wherein the amplitude of the main drive signal is equal to or smaller than the amplitude of at least one of the plurality of sub-drive signals.

11. 6. The device according to claim 1, wherein each of the plurality of sub-drive signals has an opposite phase to the main drive signal.

12. a part of the plurality of sub-active vibration members constitutes a first group, and the remainder of the plurality of sub-active vibration members constitutes a second group; the sub-driving signal applied to the sub-active vibration members of the first group is the same as or different from the main driving signal; the sub-drive signal applied to the sub-active vibration members of the second group is the same as or different from the main drive signal; 6. An apparatus according to any one of claims 1 to 5.

13. the sub active vibration members of the first group are arranged to form an "X" shape with the main active vibration member, 13. The device according to claim 12, wherein the sub active vibration members of the second group are arranged to form a "+" shape with the main active vibration member.

14. The device described in any one of claims 1 to 5, wherein the amplitude of the main drive signal applied to the main active vibration member and the amplitude of each of the multiple sub-drive signals applied to each of the multiple sub-active vibration members are symmetrical around the main active vibration member in one of the following shapes: a "+" shape, a " / " shape, a "*" shape, an "X" shape, a combination of an "X" and a "━" shape, a combination of a "+" and an "X" shape, and a left-right mirrored shape of a " / " shape.

15. Each of the plurality of active vibration members comprises: a vibration element including a piezoelectric material; a connecting member connected to at least a portion of the vibration element and connected to a rear surface of the passive vibration member; 7. The apparatus of claim 1, comprising:

16. The device of claim 15 , wherein the connecting member comprises a resilient material.

17. 7. The device according to claim 1, wherein the passive vibration member is a display panel including a display portion having a plurality of pixels that realize an image, or includes one or more materials selected from the group consisting of wood, rubber, plastic, flexible glass, fiber, cloth, paper, metal, and leather.

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