Vibrating device

Abstract

Disclosed is a vibration device that can include an active vibration member including first and second vibration parts connected to a passive vibration member and arranged in parallel, and a driving device that applies a first driving signal to the first vibration part and a second driving signal to the second vibration part based on an input signal.

Description

Technical Field

[0001] This disclosure relates to a device for outputting sound, and more specifically, for example, but not limited to, a vibrating device having enhanced sound pressure level characteristics. Background Technology

[0002] Vibration devices include standalone loudspeakers or sound devices used to provide sound. When loudspeakers are located within a display device, they occupy space; therefore, the design and spatial layout of the display device are constrained.

[0003] A loudspeaker used in a device can be, for example, an actuator comprising a magnet and a coil. However, when actuators are used in devices, they are often quite thick. The ability to achieve thin piezoelectric elements is attracting considerable attention.

[0004] Because piezoelectric elements are fragile, they are easily damaged by external impacts, resulting in low reliability of sound reproduction. Furthermore, when loudspeakers using piezoelectric elements are applied to flexible devices, their fragility limits their susceptibility to damage.

[0005] The descriptions provided in the Related Art section should not be assumed to be prior art simply because they are mentioned in or associated with that section. The descriptions in the Related Art section may include information describing one or more aspects of the subject matter art, and the descriptions in that section do not limit the invention. Summary of the Invention

[0006] Therefore, this disclosure aims to provide a vibration device that substantially avoids one or more problems caused by the limitations and disadvantages of related technologies.

[0007] The inventors of this disclosure have recognized the aforementioned limitations and other limitations related to the relevant art, and have conducted various experiments to realize a vibrating device for improving sound quality and sound pressure level characteristics. Therefore, through various experiments, the inventors of this disclosure have invented a device with a novel structure, comprising a vibrating device for improving sound quality and sound pressure level characteristics.

[0008] One aspect of this disclosure is to provide a vibration device that can enhance the sound pressure level of low-pitched vocal cords.

[0009] Additional features and aspects of this disclosure will be set forth in the description which follows, and will become apparent in part from the description, or may be learned by practicing the inventive concepts provided herein. Other features and aspects of the inventive concepts may be realized and obtained through structures particularly pointed out in this disclosure, or structures derived therefrom, and through the claims and drawings thereof.

[0010] To achieve these and other aspects of the present invention, as specifically embodied and broadly described, a vibration device may include: a passive vibrating member; an active vibrating member including a first vibrating portion and a second vibrating portion connected to and arranged in parallel with the passive vibrating member; and a driving device that applies a first driving signal to the first vibrating portion and a second driving signal to the second vibrating portion based on an input signal; wherein the driving device includes: a signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal; and a filter circuit that outputs a first high-pitched vocal cord signal and a second high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal based on the low-pitched vocal cord signal. The system includes: a first high-pitched vocal cord signal and a second low-pitched vocal cord signal; a correction circuit that corrects the sound quality of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal, as well as the first low-pitched vocal cord signal and the second low-pitched vocal cord signal, to output a first high-pitched vocal cord correction signal, a second high-pitched vocal cord correction signal, a first low-pitched vocal cord correction signal, and a second low-pitched vocal cord correction signal; a mixing circuit that mixes the first high-pitched vocal cord correction signal with the first low-pitched vocal cord correction signal to generate a first mixed signal, and mixes the second high-pitched vocal cord correction signal with the second low-pitched vocal cord correction signal to generate a second mixed signal; and a drive signal generator that outputs a first drive signal based on the first mixed signal and outputs a second drive signal based on the second mixed signal.

[0011] In another aspect, a vibration device may include: a passive vibrating member; a first active vibrating member including a first vibrating portion and a second vibrating portion connected to a first surface of the passive vibrating member and arranged in parallel; a second active vibrating member including a third vibrating portion and a fourth vibrating portion, the third vibrating portion and the fourth vibrating portion being connected to the second surface of the passive vibrating member and arranged in parallel to overlap with at least a portion of the first active vibrating member; and a driving device that applies a first driving signal to a fourth driving signal to the first to fourth vibrating portions respectively based on an input signal; wherein the driving device includes: a signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal; a filter circuit that outputs a first high-pitched vocal cord signal to a fourth high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal to a fourth low-pitched vocal cord signal based on the low-pitched vocal cord signal; and a correction circuit that corrects the first high-pitched vocal cord signal. The system comprises: a tuning signal to adjust the sound quality of each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal and the first low-pitched vocal band signal to the fourth low-pitched vocal band signal, to output the first high-pitched vocal band correction signal to the fourth high-pitched vocal band correction signal and the first low-pitched vocal band correction signal to the fourth low-pitched vocal band correction signal; a mixing circuit that mixes the first high-pitched vocal band correction signal with the first low-pitched vocal band correction signal to generate a first mixed signal, mixes the second high-pitched vocal band correction signal with the second low-pitched vocal band correction signal to generate a second mixed signal, mixes the third high-pitched vocal band correction signal with the third low-pitched vocal band correction signal to generate a third mixed signal, and mixes the fourth high-pitched vocal band correction signal with the fourth low-pitched vocal band correction signal to generate a fourth mixed signal; and a drive signal generator that outputs a first drive signal based on the first mixed signal, outputs a second drive signal based on the second mixed signal, outputs a third drive signal based on the third mixed signal, and outputs a fourth drive signal based on the fourth mixed signal.

[0012] The following description and accompanying drawings include specific details of various examples according to this specification, in addition to the means used to address the limitations described above.

[0013] According to an exemplary embodiment of this disclosure, the vibration device is designed to have enhanced sound pressure level characteristics of the bass-heavy vocal cords.

[0014] Other systems, methods, features, and advantages will be or will become apparent to those skilled in the art upon examination of the following drawings and detailed description. All such additional systems, methods, features, and advantages are intended to be included within this specification, falling within the scope of this disclosure, and protected by the appended claims. Nothing in this section should be construed as limiting these claims. Further aspects and advantages are discussed below in conjunction with embodiments of this disclosure.

[0015] It will be understood that both the foregoing general description and the following detailed description of this disclosure are exemplary and explanatory, and are intended to provide further explanation of the claimed inventive concept.

[0016] Appendix 1. A vibration device, comprising:

[0017] Passive vibrating components;

[0018] An active vibration component, comprising a first vibration portion and a second vibration portion, wherein the first vibration portion and the second vibration portion are connected to the passive vibration component and arranged in parallel; and

[0019] A driving device that applies a first driving signal to the first vibrating part and a second driving signal to the second vibrating part based on an input signal;

[0020] The driving device includes:

[0021] A signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal;

[0022] A filter circuit that outputs a first high-pitched vocal cord signal and a second high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal and a second low-pitched vocal cord signal based on the low-pitched vocal cord signal.

[0023] A correction circuit that corrects the sound quality of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal, as well as the first low-pitched vocal cord signal and the second low-pitched vocal cord signal, to output a first high-pitched vocal cord correction signal, a second high-pitched vocal cord correction signal, a first low-pitched vocal cord correction signal, and a second low-pitched vocal cord correction signal;

[0024] A mixing circuit that mixes the first high-pitched vocal band correction signal with the first low-pitched vocal band correction signal to generate a first mixed signal, and mixes the second high-pitched vocal band correction signal with the second low-pitched vocal band correction signal to generate a second mixed signal; and

[0025] A drive signal generator that outputs a first drive signal based on the first mixed signal and a second drive signal based on the second mixed signal.

[0026] Note 2. The vibration device according to Note 1, wherein the filter circuit delays the bass tone vocal signal to output the first bass tone vocal signal, and delays the bass tone vocal signal to output the second bass tone vocal signal.

[0027] Note 3. The vibration device according to Note 1, wherein the filter circuit delays the bass tone vocal signal by a first bass delay time to output the first bass tone vocal signal, and delays the bass tone vocal signal by a second bass delay time different from the first bass delay time to output the second bass tone vocal signal.

[0028] Note 4. The vibration device according to Note 3, wherein each of the first bass delay time and the second bass delay time is less than 30 ms relative to the input signal.

[0029] Note 5. The vibration device according to Note 4, wherein, relative to the input signal, each of the first bass delay time and the second bass delay time is adjusted to be different from each other within 30 ms.

[0030] Note 6. The vibration device according to Note 3, wherein each of the first bass delay time and the second bass delay time is adjusted to have a time difference in the range of 0.1 ms to 30 ms.

[0031] Note 7. The vibration equipment according to Note 1, wherein,

[0032] The filter circuit delays the high-pitched vocal cord signal to output the first high-pitched vocal cord signal, and delays the high-pitched vocal cord signal to output the second high-pitched vocal cord signal.

[0033] The delay time of the first high-pitched vocal cord signal relative to the input signal is equal to or different from the delay time of the second high-pitched vocal cord signal.

[0034] Note 8. The vibration device according to Note 7, wherein the delay time of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal is 0 ms to 10 ms relative to the input signal.

[0035] Note 9. The vibration device according to Note 1, wherein the correction signal is configured to amplify each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal up to a maximum of 3 dB.

[0036] Note 10. The vibration device according to Note 1, wherein the driving device further includes a level adjustment circuit that attenuates the levels of the high-pitched vocal cord signal and the low-pitched vocal cord signal based on a gain value, and provides the attenuated signal to the filter circuit.

[0037] Appendix 11. The vibration device according to Appendix 1, wherein each of the first vibration portion and the second vibration portion includes a first electrode layer and a second electrode layer, and

[0038] The active vibration component further includes a first cover component and a second cover component. The first cover component is configured to be disposed on a first surface of each of the first vibration portion and the second vibration portion and together cover a first electrode layer of each of the first vibration portion and the second vibration portion. The second cover component is configured to be disposed on a second surface of each of the first vibration portion and the second vibration portion and together cover a second electrode layer of each of the first vibration portion and the second vibration portion.

[0039] Note 12. The vibration device according to Note 11, wherein the active vibration component further includes a first power line disposed at the first cover component, a second power line disposed at the second cover component, and a pad portion electrically connected to the first power line and the second power line.

[0040] Note 13. The vibration device according to any one of Notes 1 to 12, wherein each of the first vibration portion and the second vibration portion comprises:

[0041] A vibrating layer comprising a plurality of inorganic material portions and a plurality of organic material portions located between the plurality of inorganic material portions;

[0042] A first electrode layer, the first electrode layer being located at a first surface of the vibration layer; and

[0043] A second electrode layer is located on a second surface of the vibration layer that is different from the first surface.

[0044] Note 14. The vibration device according to any one of Notes 1 to 12, wherein the passive vibration component comprises one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, carbon, and mirror.

[0045] Appendix 15. The vibration device according to any one of Appendices 1 to 12, wherein the passive vibration component comprises one or more of the following: a display panel including pixels configured to display images, a screen panel onto which images are projected from a display device, a light-emitting diode illumination panel, an organic light-emitting illumination panel, an inorganic light-emitting illumination panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors.

[0046] Appendix 16. A vibrating device, the vibrating device comprising:

[0047] Passive vibrating components;

[0048] A first active vibration component includes a first vibration portion and a second vibration portion, wherein the first vibration portion and the second vibration portion are connected to a first surface of the passive vibration component and arranged in parallel.

[0049] A second active vibrating member, comprising a third vibrating portion and a fourth vibrating portion, wherein the third and fourth vibrating portions are connected to a second surface of the passive vibrating member and arranged parallel to each other to overlap at least a portion of the first active vibrating member; and

[0050] A driving device that applies a first driving signal, a second driving signal, a third driving signal, and a fourth driving signal to the first to the fourth vibration parts respectively based on an input signal.

[0051] The driving device includes:

[0052] A signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal;

[0053] A filter circuit that outputs a first high-pitched vocal cord signal, a second high-pitched vocal cord signal, a third high-pitched vocal cord signal, and a fourth high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal, a second low-pitched vocal cord signal, a third low-pitched vocal cord signal, and a fourth low-pitched vocal cord signal based on the low-pitched vocal cord signal.

[0054] A correction circuit that corrects the sound quality of each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal and the first low-pitched vocal band signal to the fourth low-pitched vocal band signal, so as to output the first high-pitched vocal band correction signal to the fourth high-pitched vocal band correction signal and the first low-pitched vocal band correction signal to the fourth low-pitched vocal band correction signal.

[0055] A mixing circuit that mixes the first high-pitched vocal band correction signal with the first low-pitched vocal band correction signal to generate a first mixed signal, mixes the second high-pitched vocal band correction signal with the second low-pitched vocal band correction signal to generate a second mixed signal, mixes the third high-pitched vocal band correction signal with the third low-pitched vocal band correction signal to generate a third mixed signal, and mixes the fourth high-pitched vocal band correction signal with the fourth low-pitched vocal band correction signal to generate a fourth mixed signal; and

[0056] A drive signal generator that outputs a first drive signal based on a first mixed signal, outputs a second drive signal based on a second mixed signal, outputs a third drive signal based on a third mixed signal, and outputs a fourth drive signal based on a fourth mixed signal.

[0057] Note 17. The vibration device according to Note 16, wherein the filter circuit:

[0058] The low-pitched vocal signal is delayed to output the first low-pitched vocal signal.

[0059] The low-pitched vocal signal is delayed to output the second low-pitched vocal signal.

[0060] The bass-tone signal is delayed to output the third bass-tone signal, and

[0061] The low-pitched vocal cord signal is delayed to output the fourth low-pitched vocal cord signal.

[0062] Note 18. The vibration device according to Note 16, wherein the filter circuit:

[0063] The bass tone signal is delayed by a first bass delay time to output the first bass tone signal.

[0064] The bass tone signal is delayed by a second bass delay time, different from the first bass delay time, to output the second bass tone signal.

[0065] The bass tone signal is delayed by a third bass delay time to output the third bass tone signal, and

[0066] The bass tone signal is delayed by a fourth bass delay time, which is different from the third bass delay time, to output the fourth bass tone signal.

[0067] Note 19. The vibration device according to Note 18, wherein,

[0068] Relative to the input signal, each of the first bass delay time and the second bass delay time is less than 30ms, or

[0069] Each of the third bass delay time and the fourth bass delay time is less than 30ms relative to the input signal.

[0070] Note 20. The vibration device according to Note 18, wherein,

[0071] The first bass delay time is equal to or different from the third bass delay time, and

[0072] The second bass delay time may be equal to or different from the fourth bass delay time.

[0073] Note 21. The vibration device according to Note 16, wherein the correction circuit completely attenuates each of the third high-pitched vocal cord signal and the fourth high-pitched vocal cord signal.

[0074] Note 22. The vibration device according to Note 16, wherein the filter circuit comprises:

[0075] A first high-pitched filter, which outputs the first high-pitched vocal cord signal based on the high-pitched vocal cord signal;

[0076] A second high-pitched filter outputs a second high-pitched vocal cord signal based on the high-pitched vocal cord signal;

[0077] A third high-pitched filter, which outputs the third high-pitched vocal cord signal based on the high-pitched vocal cord signal;

[0078] A fourth high-pitched filter outputs a fourth high-pitched vocal cord signal based on the high-pitched vocal cord signal;

[0079] A first bass filter, which outputs a first bass tone signal based on the bass tone vocal cord signal;

[0080] A second bass filter, which outputs a second bass tone signal based on the bass tone vocal cord signal;

[0081] A third bass filter, which outputs a third bass tone signal based on the bass tone vocal band signal; and

[0082] A fourth bass filter that outputs the fourth bass tone signal based on the bass tone vocal signal.

[0083] Note 23. The vibration device according to Note 22, wherein the driving device further includes a level adjustment circuit, and

[0084] The level adjustment circuit includes:

[0085] A first high-frequency level adjustment circuit attenuates the level of the high-frequency vocal signal based on a gain value, so as to provide the level-adjusted high-frequency vocal signal to the first high-frequency filter and the second high-frequency filter.

[0086] A second treble level adjustment circuit attenuates the level of the treble vocal signal based on a gain value, so as to provide the level-adjusted treble vocal signal to the third and fourth treble filters.

[0087] A first bass level adjustment circuit attenuates the bass tone signal based on a gain value, providing the level-adjusted bass tone signal to the first bass filter and the second bass filter; and

[0088] A second bass level adjustment circuit attenuates the level of the bass tone signal based on a gain value, so as to provide the level-adjusted bass tone signal to the third bass filter and the fourth bass filter.

[0089] Note 24. The vibration device according to Note 23, wherein the second high-pitched level adjustment circuit inverts the high-pitched vocal signal based on the gain value, and provides the inverted high-pitched vocal signal to the third high-pitched filter and the fourth high-pitched filter.

[0090] Note 25. The vibration device according to any one of Notes 16 to 24, wherein each of the first vibration portion and the second vibration portion comprises:

[0091] A vibrating layer comprising a plurality of inorganic material portions and a plurality of organic material portions located between the plurality of inorganic material portions;

[0092] A first electrode layer, the first electrode layer being located at a first surface of the vibration layer; and

[0093] A second electrode layer is located on a second surface of the vibration layer that is different from the first surface.

[0094] Note 26. The vibration device according to any one of Notes 16 to 24, wherein the passive vibration component comprises one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, carbon, and mirror.

[0095] Note 27. The vibration device according to any one of Notes 16 to 24, wherein the passive vibration component comprises one or more of the following: a display panel including pixels configured to display images, a screen panel onto which images are projected from a display device, a light-emitting diode illumination panel, an organic light-emitting illumination panel, an inorganic light-emitting illumination panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors. Attached Figure Description

[0096] The accompanying drawings may be included to provide a further understanding of this disclosure and may be incorporated into and form part of this application. The drawings illustrate embodiments of this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0097] Figure 1 This is a diagram that schematically illustrates a device according to an embodiment of the present disclosure.

[0098] Figure 2 Embodiments according to this disclosure are illustrated. Figure 1 Examples of active vibrating components are shown in the figure.

[0099] Figure 3 It is according to the embodiments of this disclosure. Figure 2 The cross-sectional view taken by line AA′ is shown.

[0100] Figure 4 This is a perspective view illustrating a vibration layer according to a first embodiment of the present disclosure.

[0101] Figure 5 This is an example Figure 4 A perspective view of another embodiment of the vibration layer illustrated in the figure.

[0102] Figure 6 This is an example Figure 4 A perspective view of another embodiment of the vibration layer illustrated in the figure.

[0103] Figure 7 This is an example Figure 4 A perspective view of another embodiment of the vibration layer illustrated in the figure.

[0104] Figure 8 This is a cross-sectional view illustrating a device according to a second embodiment of the present disclosure.

[0105] Figure 9 This is a cross-sectional view illustrating a device according to a third embodiment of the present disclosure.

[0106] Figure 10This is a block diagram illustrating a drive device according to a first embodiment of the present disclosure.

[0107] Figure 11 This is a block diagram illustrating a drive device according to a second embodiment of the present disclosure.

[0108] Figure 12 The sound output characteristics of the device according to an embodiment of the present disclosure and the sound output characteristics of the device according to an experimental example are illustrated.

[0109] Throughout the accompanying drawings and detailed embodiments, unless otherwise described, the same reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustrative purposes, the relative dimensions and drawings of these elements may be exaggerated. Detailed Implementation

[0110] The embodiments of this disclosure will now be described in detail, examples of which may be illustrated in the accompanying drawings. In the following description, detailed descriptions of well-known functions or configurations relevant to this document will be omitted or may be provided briefly where such descriptions are determined to unnecessarily obscure the essential points of the inventive concept. The progression of the described processing steps and / or operations is exemplary; however, the order of steps and / or operations is not limited to the order set forth herein, but may be varied in manner known in the art, except for steps and / or operations that must occur in a specific order. Throughout the specification, the same reference numerals denote the same elements. The names of the various elements used in the following explanation are chosen solely for convenience of writing the specification and may therefore differ from the names used in actual products.

[0111] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following exemplary embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided to make this disclosure thorough and complete enough to assist those skilled in the art in fully understanding its scope. Furthermore, this disclosure is defined by the scope of the claims and their equivalents.

[0112] The shapes, dimensions, areas, ratios, angles, and figures disclosed in the accompanying drawings to describe embodiments of this disclosure may be merely examples, and therefore, this disclosure is not limited to the illustrated details. Similar reference numerals always refer to similar elements. In the following description, detailed descriptions of relevant known functions or configurations may be omitted or may be provided briefly when determined to unnecessarily obscure aspects of this disclosure. When the terms “comprising,” “having,” “including,” “containing,” “constituting,” “made of,” or “formed by” described in this disclosure are used, one or more additional elements may be added unless a more restrictive term such as “only” is used. Singular terms may include plural forms unless the opposite is mentioned.

[0113] When interpreting a component, even if the error or tolerance range is not explicitly described, the component is interpreted as including such an error or tolerance range.

[0114] When describing positional relationships, for example, the positional relationship between two parts is described using terms such as "above," "over," "below," "over," "below," "side," "next," etc., unless more restrictive terms such as "immediately following," "directly," or "adjacent" are used. One or more other parts may be positioned between two parts. In the description of embodiments, when a structure is described as being "above" or "below" another structure, the description should be understood to include cases where the structures are in contact with each other, as well as cases where a third structure is positioned between them.

[0115] When describing temporal relationships, such as when time sequence is described as "after", "following", "next", and "before", discontinuous situations may be included unless more restrictive terms such as "just", "immediately after", or "directly" are used.

[0116] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be construed as being limited by these terms, as they are not used to define a particular order or priority. These terms are only used to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0117] In describing the elements of this disclosure, the terms “first,” “second,” “A,” “B,” “(a),” “(b),” etc., may be used. These terms may be used only to distinguish one element from another, and the nature, order, basis, sequence, or number of the respective elements shall not be limited by these terms. Unless otherwise specified, the expression “connected,” “joined,” or “adhered” to another element or layer may mean not only directly connected or adhered to another element or layer, but also indirectly connected or adhered to another element or layer, and one or more intermediary elements or layers may be “arranged” or “placed” between elements or layers.

[0118] The term “at least one” should be understood to include any combination of one or more of the associated listed items. For example, “at least one of the first, second and third items” means a combination of all three listed elements, a combination of any two of the three elements, and each individual element (the first, second or third item).

[0119] As will be fully understood by those skilled in the art, the features of the various embodiments of this disclosure may be connected or combined with each other in part or in whole, and may operate and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0120] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Furthermore, for ease of description, the proportions, dimensions, and thicknesses of the various elements illustrated in the drawings may differ from actual proportions, dimensions, and thicknesses; therefore, the embodiments of this disclosure are not limited to the proportions shown in the drawings.

[0121] Figure 1 This is a schematic illustration of a vibration device according to an embodiment of the present disclosure. All components of the various vibration devices according to all embodiments of the present disclosure are operatively connected and configured.

[0122] Reference Figure 1 For example, the device 1 according to the first embodiment of this disclosure may be a display device, but the embodiments of this disclosure are not limited thereto.

[0123] The display device may include: a display panel comprising a plurality of pixels that realize a black-and-white or color image; and a driving portion for driving the display panel. Pixels may be sub-pixels configured with any of a plurality of colors, which configure a color image. The device according to a first embodiment of this disclosure may include an assembly (or equipment) or a set of electronic devices as a complete product (or final product) including a display panel (such as an organic light-emitting display panel, a liquid crystal display panel, etc.), such as a laptop computer, TV, computer monitor, equipment including automotive equipment or another type of equipment for vehicles, or mobile electronic devices such as smartphones or tablets.

[0124] The device 1 according to the first embodiment of the present disclosure may include a passive vibration member 10 and an active vibration member 20 connected to the passive vibration member 10 via a connecting member 15.

[0125] The passive vibrating member 10 can vibrate based on the driving (or vibration or displacement) of one or more active vibrating members 20. For example, the passive vibrating member 10 can generate one or more of vibration and sound based on the driving of the active vibrating members 20.

[0126] The passive vibration member 10 according to embodiments of this disclosure may be a display panel including a display area (or screen) with multiple pixels, wherein the multiple pixels realize a black / white or color image. Therefore, the passive vibration member 10 may generate one or more of vibration and sound based on the driving of one or more active vibration members 20. For example, while an image is displayed in the display area, the passive vibration member 10 may vibrate based on the vibration of the active vibration member 20, and thus, sound may be generated or output synchronously with the image displayed in the display area. For example, the passive vibration member 10 may be a vibration object, a display member, a display panel, a sign panel, a passive vibration plate, a front cover, a front member, a vibration panel, a sound panel, a passive vibration panel, a sound output board, a sound vibration plate, or an image screen, etc., but embodiments of this disclosure are not limited thereto.

[0127] According to another embodiment of this disclosure, the passive vibrating member 10 may be a diaphragm comprising a metallic or non-metallic material (or a composite non-metallic material) having material properties suitable for being vibrated by one or more active vibrating members 20 to output sound. For example, the passive vibrating member 10 may include a diaphragm comprising one or more materials selected from metal, plastic, paper, wood, fiber, cloth, leather, glass, carbon, and mirror. For example, the paper may be cone paper for loudspeakers. For example, the cone paper may be pulp or foamed plastic, etc., but embodiments of this disclosure are not limited thereto.

[0128] According to another embodiment of this disclosure, the passive vibration member 10 may include a display panel having pixels for displaying images, or it may include a non-display panel. For example, the passive vibration member 10 may include one or more of the following: a display panel including pixels for displaying images, a screen panel on which images are projected from a display device, a lighting panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors, but the embodiments of this disclosure are not limited thereto. For example, the non-display panel may be a light-emitting diode lighting panel (or device), an organic light-emitting lighting panel (or device), or an inorganic light-emitting lighting panel (or device), but the embodiments of this disclosure are not limited thereto.

[0129] The active vibrating member 20 can be connected to the first surface of the passive vibrating member 10 via the connecting member 15. For example, the active vibrating member 20 can be connected to the rear surface of the passive vibrating member 10 via the connecting member 15.

[0130] According to the embodiments of the present disclosure, the device 1 can vibrate the passive vibrating member 10 based on the vibration of the active vibrating member 20, and thus, sound can be output through the vibration of the passive vibrating member 10.

[0131] Figure 2 Embodiments according to this disclosure are illustrated. Figure 1 Examples of active vibrating components are shown in the figure. Figure 3 It is according to the embodiments of this disclosure. Figure 2 The cross-sectional view taken by line AA′ is shown. Figure 2 and Figure 3 An active vibration member according to an embodiment of the present disclosure is illustrated.

[0132] Reference Figures 1 to 3 According to embodiments of the present disclosure, the active vibration member 20 may include a first vibration portion 20A, a second vibration portion 20B, a first cover member 23, and a second cover member 25.

[0133] Each of the first vibrating portion 20A and the second vibrating portion 20B can be electrically separated and disposed while being spaced apart from each other along the first direction X. Each of the first vibrating portion 20A and the second vibrating portion 20B can alternately and repeatedly contract and / or expand to vibrate based on the piezoelectric effect. For example, the first vibrating portion 20A and the second vibrating portion 20B can be disposed or laid out along the first direction X at a certain interval D1. Therefore, the active vibrating member 20 in which the first vibrating portion 20A and the second vibrating portion 20B are laid out can be referred to as a vibration array, a vibration array portion, a vibration module array portion, a vibration array structure, a laid vibration array, a laid vibration array module, or a laid vibration membrane, but the embodiments of this disclosure are not limited thereto.

[0134] Each of the first vibration portion 20A and the second vibration portion 20B according to embodiments of the present disclosure may have a quadrilateral shape. For example, each of the first vibration portion 20A and the second vibration portion 20B may have a quadrilateral shape with a width of approximately 5 cm or more, but the present disclosure is not limited to the above-described shape and numerical range.

[0135] Each of the first vibrating portion 20A and the second vibrating portion 20B can be disposed or laid on the same plane, so that the active vibrating member 20 can have an enlarged area based on laying the first vibrating portion 20A and the second vibrating portion 20B with relatively small dimensions.

[0136] Each of the first vibrating portion 20A and the second vibrating portion 20B can be arranged or laid at a certain interval D1, thus enabling it to be implemented as a single vibrating device (or a single vibrating device) driven as a complete unit without being driven independently. According to embodiments of this disclosure, the first separation distance D1 between the first vibrating portion 20A and the second vibrating portion 20B relative to the first direction X can be 0.1 mm or more and less than 3 cm, or 0.5 mm to 2.5 cm, or adjusted to 1 mm to 2 cm, but embodiments of this disclosure are not limited thereto.

[0137] According to embodiments of this disclosure, each of the first vibrating portion 20A and the second vibrating portion 20B can be configured or laid out with an interval (or first separation distance) D1 of 0.1 mm or more and less than 3 cm, or 0.5 mm to 2.5 cm, or adjusted to 1 mm to 2 cm. Therefore, it can be driven as a vibrating device to increase the sound pressure level characteristics and sound reproduction band of the sound generated based on the individual vibrations of the first vibrating portion 20A and the second vibrating portion 20B. For example, the first vibrating portion 20A and the second vibrating portion 20B can be configured with an interval D1 of 0.1 mm or more and less than 5 mm to increase the sound reproduction band of the sound generated based on the individual vibrations of the first vibrating portion 20A and the second vibrating portion 20B, and to increase the low-pitched sound (e.g., sound pressure level characteristics of 500 Hz or less).

[0138] According to embodiments of this disclosure, when the first vibration portion 20A and the second vibration portion 20B are configured with a spacing D1 less than 0.1 mm or no spacing D1, the reliability of the first vibration portion 20A and the second vibration portion 20B or the vibration device 4 may be reduced or deteriorated due to damage or cracks caused by physical contact occurring between them during each vibration of the first vibration portion 20A and the second vibration portion 20B.

[0139] According to embodiments of this disclosure, when the first vibrating portion 20A and the second vibrating portion 20B are set to an interval D1 of 3 cm or more, the first vibrating portion 20A and the second vibrating portion 20B cannot be driven as a single vibrating device due to the independent vibration of each of them. Therefore, the sound pressure level characteristics and sound reproduction band of the sound generated based on the vibration of the first vibrating portion 20A and the second vibrating portion 20B can be reduced or degraded. For example, when the first vibrating portion 20A and the second vibrating portion 20B are set to an interval D1 of 3 cm or more, the sound characteristics and sound pressure level characteristics of the low-pitched vocal band (e.g., below 500 Hz) can each be reduced.

[0140] According to an embodiment of this disclosure, when the first vibration portion 20A and the second vibration portion 20B are set to a 5mm interval D1, each of the first vibration portion 20A and the second vibration portion 20B may not be perfectly driven as a vibration device. Therefore, the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords (e.g., below 200Hz) may be reduced or degraded respectively.

[0141] According to another embodiment of this disclosure, when the first vibrating portion 20A and the second vibrating portion 20B are set to a 1mm interval D1, each of the first vibrating portion 20A and the second vibrating portion 20B can be driven as a vibrating device, and thus, the sound reproduction band can be increased, and the sound of the low-pitched vocal band (e.g., sound pressure level characteristics below 500Hz) can be increased. For example, when the first vibrating portion 20A and the second vibrating portion 20B are set to a 1mm interval D1, the active vibrating member 20 can be implemented as a large-area vibrator expanded based on the optimization of the separation distance (or interval) between the first vibrating portion 20A and the second vibrating portion 20B. Therefore, the active vibrating member 20 can be driven as a large-area vibrator based on the individual vibration of the first vibrating portion 20A and the second vibrating portion 20B, and thus, in the low-pitched vocal band generated by the large-area vibration of the active vibrating member 20, the sound characteristics and sound pressure level characteristics can each increase the sound reproduction band.

[0142] Therefore, in order to achieve individual vibration (or a single vibration device) of the first vibrating part 20A and the second vibrating part 20B, the interval (or first separation distance) D1 between the first vibrating part 20A and the second vibrating part 20B can be adjusted to be 0.1mm or more and less than 3cm. Furthermore, in order to achieve individual vibration (or a single vibration device) of the first vibrating part 20A and the second vibrating part 20B and to increase the sound pressure level characteristics of the bass vocal cords, the interval (or first separation distance) D1 between the first vibrating part 20A and the second vibrating part 20B can be adjusted to be 0.1mm or more and less than 5mm, or 0.2mm to 0.4mm, or adjusted to 0.3mm.

[0143] Each of the first vibration portion 20A and the second vibration portion 20B according to embodiments of the present disclosure may include a vibration layer 21a, a first electrode layer 21b, and a second electrode layer 21c.

[0144] The vibration layer 21a may include a piezoelectric material (or an electroactive material) exhibiting a piezoelectric effect. For example, the piezoelectric material may have the following characteristics: when pressure or twisting (or bending) is applied to the crystal structure by an external force, a potential difference arises due to dielectric polarization caused by changes in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated by an electric field based on a reverse voltage applied thereon. The vibration layer 21a may be configured as a ceramic-based material for generating relatively high vibrations, or it may be configured as a piezoelectric ceramic having a perovskite-based crystal structure. For example, the vibration layer 21a may be referred to as a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric material portion, an electroactive portion, a piezoelectric structure, a piezoelectric composite layer, a piezoelectric composite, or a piezoelectric ceramic composite, etc., but embodiments of this disclosure are not limited thereto.

[0145] The first electrode layer 21b may be disposed on the first surface (or upper surface) of the vibration layer 21a. The first electrode layer 21b may have the same size as the vibration layer 21a, or it may have a smaller size than the vibration layer 21a. For example, the first electrode layer 21b may be formed on the entire first surface of the vibration layer 21a except for the peripheral portion.

[0146] The second electrode layer 21c may be disposed on a second surface (or lower surface) of the vibration layer 21a that is opposite to or different from the first surface. The second electrode layer 21c may have the same size as the vibration layer 21a, or it may have a smaller size than the vibration layer 21a. For example, the second electrode layer 21c may be formed on the entire second surface of the vibration layer 21a except for the peripheral portion. The second electrode layer 21c may have the same shape as the vibration layer 21a, but the embodiments of this disclosure are not limited thereto.

[0147] According to embodiments of the present disclosure, one or more of the first electrode layer 21b and the second electrode layer 21c may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent or semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but embodiments of the present disclosure are not limited thereto. The opaque conductive material may include aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), or magnesium (Mg), and any alloy thereof, but embodiments of the present disclosure are not limited thereto.

[0148] The vibrating layer 21a can be bipolarized (or polarized) by applying a certain voltage to the first electrode layer 21b and the second electrode layer 21c in a certain temperature atmosphere, or in a temperature atmosphere that can change from high temperature to room temperature, but the embodiments of this disclosure are not limited thereto. For example, the vibrating layer 21a can vibrate by alternately and repeatedly contracting or expanding based on the reverse piezoelectric effect according to the sound signal (or voice signal or drive signal) applied from the outside to the first electrode layer 21b and the second electrode layer 21c. For example, the vibrating layer 21a can vibrate based on vertical vibration and planar vibration by the signal applied to the first electrode layer 21b and the second electrode layer 21c. The vibrating layer 21a can increase the displacement of the passive vibrating member 10 by contracting and / or expanding in the planar direction, thereby further improving the vibration of the passive vibrating member 10.

[0149] The first cover member 23 may be disposed on the first surface of each of the first vibration portion 20A and the second vibration portion 20B. For example, the first cover member 23 may be configured to collectively cover the first electrode layer 21b of each of the first vibration portion 20A and the second vibration portion 20B. Therefore, the first cover member 23 can protect the first surface of each of the first vibration portion 20A and the second vibration portion 20B as well as the first electrode layer 21b.

[0150] The second cover member 25 may be disposed on the second surface of each of the first vibration portion 20A and the second vibration portion 20B. For example, the second cover member 25 may be configured to collectively cover the second electrode layer 21c of each of the first vibration portion 20A and the second vibration portion 20B. Therefore, the second cover member 25 can protect the second surface and the second electrode layer 21c of each of the first vibration portion 20A and the second vibration portion 20B.

[0151] The first cover member 23 and the second cover member 25 according to embodiments of the present disclosure may each comprise one or more materials selected from plastic, fiber, cloth, paper, leather, carbon, and wood, but embodiments of the present disclosure are not limited thereto. For example, each of the first cover member 23 and the second cover member 25 may comprise the same material or different materials. For example, each of the first cover member 23 and the second cover member 25 may be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but embodiments of the present disclosure are not limited thereto.

[0152] One or more of the first cover member 23 and the second cover member 25 according to embodiments of the present disclosure may include an adhesive member. For example, one or more of the first cover member 23 and the second cover member 25 may include an adhesive member that is attached to or attached to the first vibrating portion 20A and the second vibrating portion 20B, and a protective member (or peeling member) that covers or protects the adhesive member. For example, the adhesive member may include an electrically insulating material having adhesive properties and capable of compression and decompression. For example, the first cover member 23 may include an adhesive member that is attached to or attached to the first vibrating portion 20A and the second vibrating portion 20B, and a protective member (or peeling member) that covers or protects the adhesive member.

[0153] The first cover member 23 can be connected or attached to the first surface or the first electrode layer 21b of the first vibrating part 20A and the second vibrating part 20B via the first adhesive layer 22. For example, the first cover member 23 can be connected or attached to the first surface or the first electrode layer 21b of the first vibrating part 20A and the second vibrating part 20B via a film lamination process using the first adhesive layer 22.

[0154] The second cover member 25 can be connected or attached to the second surface or the second electrode layer 21c of the first vibrating part 20A and the second vibrating part 20B via the second adhesive layer 24. For example, the second cover member 25 can be connected or attached to the second surface or the second electrode layer 21c of the first vibrating part 20A and the second vibrating part 20B via a film lamination process using the second adhesive layer 24.

[0155] Each of the first adhesive layer 22 and the second adhesive layer 24 according to embodiments of the present disclosure may include an electrically insulating material that is adhesive and capable of compression and decompression. For example, each of the first adhesive layer 22 and the second adhesive layer 24 may include epoxy resin, acrylic resin, silicone resin, polyurethane resin or other organic adhesive materials, but embodiments of the present disclosure are not limited thereto.

[0156] The active vibration member 20 according to the embodiments of the present disclosure may further include a first power line PL1 disposed at the first cover member 23, a second power line PL2 disposed at the second cover member 25, and a pad portion 26 electrically connected to the first power line PL1 and the second power line PL2.

[0157] According to embodiments of the present disclosure, the first power line PL1 may include a first upper power line PL11 and a second upper power line PL12 disposed along a second direction Y. For example, the first upper power line PL11 may be connected to or electrically and directly connected to the first electrode layer 21b of the first vibration portion 20A. The second upper power line PL12 may be connected to or electrically and directly connected to the first electrode layer 21b of the second vibration portion 20B.

[0158] According to embodiments of the present disclosure, the second power line PL2 may include a first lower power line PL21 and a second lower power line PL22 disposed along a second direction Y. For example, the first lower power line PL21 may be connected to or electrically and directly connected to the second electrode layer 21c of the first vibration portion 20A. The second lower power line PL22 may be connected to or electrically and directly connected to the second electrode layer 21c of the second vibration portion 20B.

[0159] The pad portion 26 may be configured on the periphery of either the first cover member 23 or the second cover member 25 to be electrically connected to a portion (or one end) of each of the first power line PL1 and the second power line PL2.

[0160] According to embodiments of the present disclosure, the pad portion 26 may include a first pad electrode electrically connected to one end of a first power line PL1, and a second pad electrode electrically connected to one end of a second power line PL2.

[0161] According to another embodiment of this disclosure, the pad portion 26 can be electrically connected to the signal cable 27. The signal cable 27 can be electrically connected to the pad portion 26 disposed on the active vibration member 20, and can provide a vibration drive signal (or sound signal or voice signal) provided from the vibration drive circuit to the first vibration member 20A and the second vibration member 20B. According to an embodiment of this disclosure, the signal cable 27 may include a first terminal electrically connected to a first pad electrode of the pad portion 26 and a second terminal electrically connected to a second pad electrode of the pad portion 26. For example, the signal cable 27 may be configured as a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, but the embodiments of this disclosure are not limited thereto.

[0162] Figure 4 This is a perspective view illustrating a vibration layer according to a first embodiment of the present disclosure. Figure 4 Examples Figure 3 Examples of the first and second vibration components shown.

[0163] Reference Figure 4 According to another embodiment of the present disclosure, the vibration layer 21a may include a plurality of first portions 21a1 and a plurality of second portions 21a2. For example, the plurality of first portions 21a1 and the plurality of second portions 21a2 may be arranged alternately and repeatedly along a first direction X (or a second direction Y). For example, the first direction X may be the width direction of the vibration layer 21a, and the second direction Y may be the length direction of the vibration layer 21a, but the embodiments of the present disclosure are not limited thereto; the first direction X may be the length direction of the vibration layer 21a, and the second direction Y may be the width direction of the vibration layer 21a.

[0164] Each of the plurality of first portions 21a1 can be configured as an inorganic material portion or a piezoelectric material portion. The inorganic material portion may include a piezoelectric material, a composite piezoelectric material, or an electroactive material having a piezoelectric effect.

[0165] Each of the plurality of first parts 21a1 can be configured as a ceramic-based material for generating relatively high vibrations, or can be configured as a piezoelectric ceramic having a perovskite-based crystal structure.

[0166] The first part 21a1 of the embodiments of this disclosure may include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni) and niobium (Nb), but the embodiments of this disclosure are not limited thereto.

[0167] According to another embodiment of this disclosure, the first part 21a1 may include a lead zirconate titanate (PZT) based material containing lead (Pb), zirconium (Zr), and titanium (Ti), or may include a nickel zirconate niobate lead zirconate niobate (PZNN) based material containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but the embodiments of this disclosure are not limited thereto. Alternatively, the first part 21a1 may include at least one or more of calcium titanate (CaTiO3), barium titanate (BaTiO3), and strontium titanate (SrTiO3), each of which does not contain lead (Pb), but the embodiments of this disclosure are not limited thereto.

[0168] Each of the plurality of first portions 21a1 according to embodiments of the present disclosure may be disposed between a plurality of second portions 21a2 and may have a first width W1 parallel to a first direction X (or a second direction Y) and a length parallel to a second direction Y (or a first direction X). Each of the plurality of second portions 21a2 may have a second width W2 parallel to the first direction X (or a second direction Y) and may have a length parallel to the second direction Y (or a first direction X). The first width W1 may be the same as or different from the second width W2. For example, the first width W1 may be greater than the second width W2. For example, the first portions 21a1 and the second portions 21a2 may include line shapes or stripe shapes having the same size or different sizes. Therefore, the vibrating layer 21a may include a 2-2 composite structure with piezoelectric properties having 2-2 vibration modes, and thus may have a resonant frequency below 20 kHz, but embodiments of the present disclosure are not limited thereto. For example, the resonant frequency of the vibrating layer 21a may vary based on at least one or more of the shape, length, and thickness.

[0169] In the vibrating layer 21a, each of the plurality of first portions 21a1 and the plurality of second portions 21a2 may be arranged (or arranged) parallel to each other in the same plane (or the same layer). Each of the plurality of second portions 21a2 may be configured to fill the gap between two adjacent first portions of the plurality of first portions 21a1, and may be connected to or attached to the adjacent second portion 21a2. Thus, the vibrating layer 21a may extend to the desired size or length based on the side connection (or connection) between the first portions 21a1 and the second portions 21a2.

[0170] In the vibrating layer 21a, each of the plurality of first portions 21a1 may have a different size (or width). For example, the size (or width) of each of the plurality of first portions 21a1 may gradually decrease or increase in the direction from the central portion of the vibrating layer 21a to the two peripheries (or the two ends or both portions). For example, in the vibrating layer 21a, based on the various inherent vibration frequencies of the vibrations of each of the plurality of first portions 21a1 with different sizes, the sound pressure level characteristics of the sound can be enhanced, and the sound reproduction band can be increased.

[0171] Multiple second portions 21a2 can be disposed between multiple first portions 21a1. Therefore, in the vibrational layer 21a, the vibrational energy linked by the unit lattice of each first portion 21a1 can be increased by the corresponding second portion 21a2, thereby increasing the vibrational characteristics while ensuring piezoelectric properties and flexibility. For example, the second portion 21a2 may comprise one or more of epoxy-based polymers, acrylic polymers, and silicone polymers, but embodiments of this disclosure are not limited thereto.

[0172] According to embodiments of the present disclosure, multiple second portions 21a2 can be configured as organic material portions. For example, the organic material portions can be disposed between the inorganic material portions, thereby absorbing impacts applied to the inorganic material portions (or the first portion), releasing stress concentrated on the inorganic material portions to enhance the overall durability of the vibrating layer 21a, and providing flexibility to the vibrating layer 21a or the active vibrating member 20.

[0173] The organic material portion disposed in the second part 21a2 may include one or more of organic materials, organic polymers, organic piezoelectric materials, or organic non-piezoelectric materials that have flexible characteristics compared to the inorganic material portion of the first part 21a1. For example, the second part 21a2 may be referred to as a flexible adhesive portion, elastic portion, bending portion, damping portion, or flexible portion, etc., but the embodiments of this disclosure are not limited thereto.

[0174] Multiple first portions 21a1 and second portions 21a2 can be disposed (or connected) on the same plane, thus the vibrating layer 21a according to embodiments of the present disclosure can have a single thin film type. For example, the vibrating layer 21a can have a structure in which multiple first portions 21a1 are connected to one side. For example, multiple first portions 21a1 can have a structure connected to the entire vibrating layer 21a. For example, the vibrating layer 21a can vibrate in the vertical direction by the first portions 21a1 having vibrational characteristics, and can be bent into an arc shape by the second portions 21a2 having elasticity.

[0175] Figure 5 This is an example Figure 4A perspective view of another embodiment of the vibration layer shown.

[0176] Reference Figure 5 According to another embodiment of the present disclosure, the vibration layer 21a may include a plurality of first portions 21a1 spaced apart from each other along a first direction X and a second direction Y, and a second portion 21a2 disposed between the plurality of first portions 21a1.

[0177] Each of the plurality of first portions 21a1 can be configured to be spaced apart from each other along the first direction X and the second direction Y. For example, each of the plurality of first portions 21a1 can have a hexahedral shape (or a six-faced object shape) of the same size and can be configured in a grid shape. Each of the plurality of first portions 21a1 can include the same as described above. Figure 4 The first part 21a1 describes essentially the same piezoelectric material; therefore, similar reference numerals refer to similar elements, and their repeated descriptions may be omitted or provided briefly.

[0178] The second portion 21a2 may be disposed between the plurality of first portions 21a1 along each of the first direction X and the second direction Y. The second portion 21a2 may be configured to fill the gap or space between two adjacent first portions 21a1, or to surround each of the plurality of first portions 21a1; therefore, the second portion 21a2 may be connected to or attached to adjacent first portions 21a1. According to embodiments of the present disclosure, the width W4 of the second portion 21a2 disposed between two adjacent first portions 21a1 along the first direction X may be the same as or different from the width W3 of the first portion 21a1, and the width W4 of the second portion 21a2 disposed between two adjacent first portions 21a1 along the second direction Y may be the same as or different from the width W3 of the first portion 21a1. The second portion 21a2 may include, as referenced above... Figure 4 The second part 21a2 describes essentially the same organic material; therefore, similar reference numerals refer to similar elements, and their repeated descriptions may be omitted or provided briefly.

[0179] According to another embodiment of this disclosure, the vibrating layer 21a may include a 1-3 composite structure with piezoelectric properties having 1-3 vibration modes, and therefore may have a resonant frequency of less than 30 MHz, but the embodiments of this disclosure are not limited thereto. For example, the resonant frequency of the vibrating layer 21a may vary based on at least one or more of the shape, length, and thickness.

[0180] Figure 6 This is an example Figure 4 A perspective view of another embodiment of the vibrating part illustrated in the figure.

[0181] Reference Figure 6 According to another embodiment of the present disclosure, the vibration layer 21a may include a plurality of first portions 21a1 spaced apart from each other along a first direction X and a second direction Y, and a second portion 21a2 disposed between the plurality of first portions 21a1.

[0182] Each of the plurality of first portions 21a1 may have a flat structure with a circular shape. For example, each of the plurality of first portions 21a1 may have a circular plate shape, but embodiments of this disclosure are not limited thereto. For example, each of the plurality of first portions 21a1 may have a dot shape including an elliptical shape, a polygonal shape, a triangular shape, or a donut shape. Each of the plurality of first portions 21a1 may include the shapes described above. Figure 4 The first part 21a1 describes essentially the same piezoelectric material; therefore, similar reference numerals refer to similar elements, and their repeated descriptions may be omitted or provided briefly.

[0183] The second portion 21a2 may be disposed between the plurality of first portions 21a1 along each of the first direction X and the second direction Y. The second portion 21a2 may be configured to surround each of the plurality of first portions 21a1, and thus may be connected to or attached to the side surface of each of the plurality of first portions 21a1. Each of the plurality of first portions 21a1 and the second portion 21a2 may be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 21a2 may include elements referenced above. Figure 4 The second part 21a2 describes essentially the same organic material; therefore, similar reference numerals refer to similar elements, and their repeated descriptions may be omitted or provided briefly.

[0184] Figure 7 This is an example Figure 4 A perspective view of another embodiment of the vibrating portion shown.

[0185] Reference Figure 7 According to another embodiment of the present disclosure, the vibration layer 21a may include a plurality of first portions 21a1 spaced apart from each other along a first direction X and a second direction Y, and a second portion 21a2 disposed between the plurality of first portions 21a1.

[0186] Each of the plurality of first portions 21a1 may have a flat structure in the shape of a triangle. For example, each of the plurality of first portions 21a1 may have a triangular shape, but embodiments of this disclosure are not limited thereto. Each of the plurality of first portions 21a1 may include the structure described above. Figure 4 The first part 21a1 describes essentially the same piezoelectric material; therefore, similar reference numerals refer to similar elements, and their repeated descriptions may be omitted or provided briefly.

[0187] According to embodiments of this disclosure, four adjacent first portions 21a1 of a plurality of first portions 21a1 may be adjacent to each other to form a quadrilateral (or a square shape or a rectangular shape). The vertices of the four adjacent first portions 21a1 forming the quadrilateral may be adjacent to each other at the central portion (or central part) of the quadrilateral shape.

[0188] The second portion 21a2 may be disposed between the plurality of first portions 21a1 along each of the first direction X and the second direction Y. The second portion 21a2 may be configured to surround each of the plurality of first portions 21a1, and therefore may be connected to or attached to the side surface of each of the plurality of first portions 21a1. Each of the plurality of first portions 21a1 and the second portion 21a2 may be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 21a2 may include elements referenced above. Figure 4 The second part 21a2 describes essentially the same organic material; therefore, similar reference numerals refer to similar elements, and their repeated descriptions may be omitted or provided briefly.

[0189] According to another embodiment of this disclosure, 2N (where N is a natural number greater than or equal to 2) adjacent first portions 21a1 of a plurality of first portions 21a1 having a triangular shape can be arranged adjacent to each other to form a 2N-angle shape. For example, six adjacent first portions 21a1 of the plurality of first portions 21a1 can be adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). The vertices of the six adjacent first portions 21a1 forming the hexagonal shape can be adjacent to each other at the central portion (or central part) of the hexagonal shape. A second portion 21a2 can be configured to surround each of the plurality of first portions 21a1, and thus can be connected to or attached to the side surface of each of the plurality of first portions 21a1. Each of the plurality of first portions 21a1 and second portions 21a2 can be arranged (or arranged) in parallel on the same plane (or the same layer).

[0190] Figure 8 This is a cross-sectional view illustrating a device according to a second embodiment of the present disclosure.

[0191] Reference Figure 8 According to the second embodiment of the present disclosure, the device 2 may include a passive vibration member 10, a first active vibration member 20, and a second active vibration member 40.

[0192] The passive vibration component 10 can be compared with the above reference. Figure 1 The passive vibrating component 10 is the same as described, therefore its repeated description can be omitted or provided briefly.

[0193] The first active vibrating member 20 can be connected to the first surface 10a (e.g., the rear surface) of the passive vibrating member 10 via the first connecting member 15.

[0194] The second active vibrating member 40 may overlap or stack with the first active vibrating member 20, and may be connected to the second surface 10b of the passive vibrating member 10 via the second connecting member 35. For example, the second active vibrating member 40 may be connected to the front surface 10b of the passive vibrating member 10 to overlap or stack with at least a portion of the first active vibrating member 20, with the passive vibrating member 10 positioned between them. For example, the second active vibrating member 40 may face the first active vibrating member 20, with the passive vibrating member 10 positioned between them, or it may be arranged in a vertically symmetrical structure relative to the passive vibrating member 10.

[0195] Each of the first active vibrating member 20 and the second active vibrating member 40 can be configured to, as referenced above, [do something]. Figures 2 to 7 The active vibration member 20 described according to the embodiments of this disclosure is substantially the same, therefore, its repeated description may be omitted or provided briefly.

[0196] The first vibration portion 20A and the second vibration portion 20B of the first active vibrating member 20 can overlap or be layered with the first vibration portion 20A and the second vibration portion 20B of the second active vibrating member 40 in a one-to-one relationship. For example, the first vibration portion 20A can be the third vibration portion, and the second vibration portion 20B can be the fourth vibration portion.

[0197] The first active vibrating member 20 and the second active vibrating member 40 may have mutually inverted structures and may be configured to displace (or vibrate) relative to each other in the same direction. For example, the driving signal applied to the first active vibrating member 20 may have a phase opposite to that of the driving signal applied to the second active vibrating member 40, but embodiments of this disclosure are not limited thereto. For example, the phase of the driving signal applied to the first active vibrating member 20 may have an opposite phase (or anti-phase) relative to the phase of the driving signal applied to the second active vibrating member 40.

[0198] The device 2 according to the second embodiment of the present disclosure may include a vertically stacked structure of a first active vibrating member 20 and a second active vibrating member 40. Therefore, the displacement width (or vibration width) of the passive vibrating member 10 based on the vibration of each of the first active vibrating member 20 and the second active vibrating member 40 can be increased, thereby enhancing the sound pressure level characteristics and / or sound characteristics of the low-pitched vocal cords generated based on the vibration of the passive vibrating member 10.

[0199] Figure 9 This is a cross-sectional view illustrating a device according to a third embodiment of the present disclosure.

[0200] Reference Figure 9 According to the second embodiment of the present disclosure, the device 2 may include a passive vibration member 10, a first active vibration member 20, and a second active vibration member 40.

[0201] The first active vibrating member 20 and the second active vibrating member 40 can be arranged alternately, therefore, the device 3 according to the third embodiment of the present disclosure can be different from the device 2 according to the second embodiment of the present disclosure. Therefore, in the following, the device 3 according to the third embodiment of the present disclosure will be described with reference to the differences from the device 2 according to the second embodiment of the present disclosure.

[0202] In the device 3 according to the third embodiment of the present disclosure, the first active vibrating member 20 and the second active vibrating member 40 may be configured to overlap each other by half. For example, the first vibrating portion 20A of the first active vibrating member 20 may be configured to overlap with the second vibrating portion 20B of the second active vibrating member 40.

[0203] The device 3 according to the third embodiment of the present disclosure may include an interleaved stacked structure of a first active vibrating member 20 and a second active vibrating member 40, thereby resulting in an increase in the displacement width (or vibration width) of the passive vibrating member 10 based on the vibration of each of the first active vibrating member 20 and the second active vibrating member 40, thereby enhancing the sound pressure level characteristics and / or sound characteristics of the low-pitched vocal cords generated based on the vibration of the passive vibrating member 10.

[0204] Figure 10 This is a block diagram illustrating a drive device according to a first embodiment of the present disclosure. Figure 10 The above references are illustrated. Figures 1 to 7 The driving device of the device according to the first embodiment of the present disclosure is described.

[0205] Reference Figure 10 The driving device 100 according to the first embodiment of the present disclosure may include a signal separation circuit 110, a filter circuit 130, a correction circuit 140, a mixing circuit 150, and a driving signal generator 160.

[0206] The signal separation circuit 110 can be configured, based on the control of the host controller, to separate the input signal IS into a low-pitched vocal band signal and a high-pitched vocal band signal. For example, the signal separation circuit 110 can separate the input signal into a first-pitched vocal band and a second-pitched vocal band different from the first-pitched vocal band, and can output signals for the first-pitched vocal band and the second-pitched vocal band. For example, the signal separation circuit 110 can be configured to separate the input signal into a low-pitched vocal band signal and a high-pitched vocal band signal for 500Hz. For example, the signal separation circuit 110 can be configured to separate the input signal into a first-pitched vocal band and a second-pitched vocal band for 500Hz. For example, the signal separation circuit 110 may include one or more crossover circuits.

[0207] The filter circuit 130 can output a first high-pitched vocal cord signal and a second high-pitched vocal cord signal based on the high-pitched vocal cord signal provided by the signal separation circuit 110. For example, the filter circuit 130 can filter the high-pitched vocal cord signal provided by the signal separation circuit 110 to output the first high-pitched vocal cord signal and the second high-pitched vocal cord signal. The filter circuit 130 can also output a first low-pitched vocal cord signal and a second low-pitched vocal cord signal based on the low-pitched vocal cord signal provided by the signal separation circuit 110. For example, the filter circuit 130 can filter the low-pitched vocal cord signal provided by the signal separation circuit 110 to output the first low-pitched vocal cord signal and the second low-pitched vocal cord signal.

[0208] The filter circuit 130 can time-delay the high-pitched vocal signal provided by the signal separation circuit 110 to output a first high-pitched vocal signal and a second high-pitched vocal signal. The filter circuit 130 can also time-delay the low-pitched vocal signal provided by the signal separation circuit 110 to output a first low-pitched vocal signal and a second low-pitched vocal signal.

[0209] The filter circuit 130 according to embodiments of the present disclosure may include a first high-frequency filter 131, a second high-frequency filter 132, a first low-frequency filter 135, and a second low-frequency filter 136.

[0210] The first high-pitched filter 131 can delay (or delay by) a first high-pitched delay time the high-pitched vocal signal provided from the signal separation circuit 110 to output a first high-pitched vocal signal. The second high-pitched filter 132 can delay (or delay by) a second high-pitched delay time the high-pitched vocal signal provided from the signal separation circuit 110 to output a second high-pitched vocal signal.

[0211] According to embodiments of this disclosure, for the input signal IS, the second treble delay time may be equal to or different from the first treble delay time. For example, when a time delay is applied to the treble, the treble may be uneven due to complex amplification attenuation or constructive and destructive interference, and the sound quality may deteriorate for this reason. Therefore, each of the first and second treble delay times can be adjusted within a range that does not degrade the sound quality of the treble. For example, for the input signal IS, each of the first and second treble delay times can be adjusted to be equal to or different within a range of 0 ms to 10 ms.

[0212] The first bass filter 135 can delay (or delay by) a first bass delay time the bass-tone signal provided from the signal separation circuit 110, and can output the first bass-tone signal. The second bass filter 136 can delay (or delay by) a second bass delay time the bass-tone signal provided from the signal separation circuit 110, and can output the second bass-tone signal.

[0213] According to embodiments of this disclosure, for the input signal IS, the second bass delay time may differ from the first bass delay time. For example, in bass frequencies with long periods, when the bass frequencies are time-delayed, the sound quality may not be significantly reduced or degraded compared to the treble frequencies due to amplification attenuation or constructive and destructive interference. Therefore, the first bass delay time can be distinguished from the second bass delay time, and the bass tone band can be extended based on the first and second bass delay times of the bass tone band signal.

[0214] According to an embodiment of this disclosure, for an input signal IS, each of the first bass delay time and the second bass delay time can be adjusted to be different from each other within 30ms.

[0215] According to another embodiment of this disclosure, each of the first bass delay time and the second bass delay time can be adjusted to have a time difference in the range of 0.1ms to 30ms, or 1ms to 20ms, or adjusted to 3ms to 10ms.

[0216] The correction circuit 140 can be configured to correct the sound quality of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal, as well as the first low-pitched vocal cord signal and the second low-pitched vocal cord signal, provided from the filter circuit 130. For example, the correction circuit 140 can correct each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal, as well as the first low-pitched vocal cord signal and the second low-pitched vocal cord signal, to output each of the first high-pitched vocal cord correction signal, the second high-pitched vocal cord correction signal, the first low-pitched vocal cord correction signal, and the second low-pitched vocal cord correction signal.

[0217] According to embodiments of this disclosure, relative to a reference level, the correction circuit 140 can reduce or amplify the frequency range of each of the first high-pitched vocal band signal, the second high-pitched vocal band signal, the first low-pitched vocal band signal, and the second low-pitched vocal band signal. Therefore, it can enhance the sound quality of each of the first high-pitched vocal band signal, the second high-pitched vocal band signal, the first low-pitched vocal band signal, and the second low-pitched vocal band signal, or improve their flatness, and can output a quality-enhanced signal or a flattened signal. For example, with respect to a frequency-based reference sound pressure level, the correction circuit 140 can amplify or attenuate each of the first high-pitched vocal band signal, the second high-pitched vocal band signal, the first low-pitched vocal band signal, and the second low-pitched vocal band signal. For example, the correction circuit 140 can be configured to amplify each of the first high-pitched vocal band signal and the second high-pitched vocal band signal by up to 3 dB (+3 dB).

[0218] The correction circuit 140 according to embodiments of the present disclosure may include a first treble correction circuit 141, a second treble correction circuit 142, a first bass correction circuit 145, and a second bass correction circuit 146.

[0219] Regarding the frequency-based reference level, the first treble correction circuit 141 can amplify or attenuate the first treble-tone vocal signal to output a first treble-tone vocal correction signal. Regarding the frequency-based reference level, the second treble correction circuit 142 can amplify or attenuate the second treble-tone vocal signal to output a second treble-tone vocal correction signal. For example, each of the first treble correction circuit 141 and the second treble correction circuit 142 can be configured to amplify the corresponding treble-tone vocal signal up to 3 dB (+3 dB). For example, each of the first treble correction circuit 141 and the second treble correction circuit 142 can be a parametric equalizer, but embodiments of this disclosure are not limited thereto.

[0220] Regarding the frequency-based reference level, the first bass correction circuit 145 can amplify or attenuate the first bass tone signal to output a first bass tone correction signal. Regarding the frequency-based reference level, the second bass correction circuit 146 can amplify or attenuate the second bass tone signal to output a second bass tone correction signal. For example, each of the first bass correction circuit 145 and the second bass correction circuit 146 can be a parametric equalizer, but embodiments of this disclosure are not limited thereto.

[0221] The driving device 100 according to the first embodiment of the present disclosure may further include a level adjustment circuit 120 for reducing, preventing or minimizing overshoot of the signal amplification of the correction circuit 140.

[0222] The level adjustment circuit 120 can attenuate the level of each of the high-pitched and low-pitched vocal signals provided from the signal separation circuit 110 based on a gain value, and can output the attenuated signal to each of the first high-frequency filter 131 and the second high-frequency filter 132 of the filter circuit 130. Furthermore, the level adjustment circuit 120 can adjust one or more of the phase and amplitude of each of the high-pitched and low-pitched vocal signals provided from the signal separation circuit 110 based on a gain value, and can output the adjusted signal to each of the first high-frequency filter 131 and the second high-frequency filter 132 of the filter circuit 130.

[0223] The level adjustment circuit 120 according to embodiments of the present disclosure may include a high-frequency level adjustment circuit 121 and a low-frequency level adjustment circuit 125.

[0224] The high-frequency level adjustment circuit 121 can attenuate the level of the high-frequency vocal signal provided by the signal separation circuit 110 based on the gain value, and can output the attenuated signal to each of the first high-frequency filter 131 and the second high-frequency filter 132 of the filter circuit 130.

[0225] The bass level adjustment circuit 125 can adjust one or more of the phase and amplitude of the bass tone signal provided from the signal separation circuit 110 based on the gain value, and can output the adjusted signal to each of the first bass filter 135 and the second bass filter 136 of the filter circuit 130.

[0226] The mixing circuit 150 can mix and output a first high-pitched vocal cord correction signal provided by the first high-pitched correction circuit 141 and a first low-pitched vocal cord correction signal provided by the first low-pitched correction circuit 145. Additionally, the mixing circuit 150 can mix and output a second high-pitched vocal cord correction signal provided by the second high-pitched correction circuit 142 and a second low-pitched vocal cord correction signal provided by the second low-pitched correction circuit 146.

[0227] The hybrid circuit 150 according to embodiments of the present disclosure may include a first hybrid circuit 151 and a second hybrid circuit 155.

[0228] The first mixing circuit 151 can mix the first high-pitched vocal cord correction signal provided by the first high-pitched correction circuit 141 of the correction circuit 140 and the first low-pitched vocal cord correction signal provided by the first low-pitched correction circuit 145 to generate a first mixed signal, and can provide the generated first mixed signal to the drive signal generator 160.

[0229] The second mixing circuit 155 can mix the second high-pitched vocal cord correction signal provided by the second high-pitched correction circuit 142 of the correction circuit 140 and the second low-pitched vocal cord correction signal provided by the second low-pitched correction circuit 146 to generate a second mixed signal, and can provide the generated second mixed signal to the drive signal generator 160.

[0230] The drive signal generator 160 can output a first drive signal based on a first mixed signal provided from the mixing circuit 150, and can output a second drive signal based on a second mixed signal provided from the mixing circuit 150.

[0231] The drive signal generator 160 according to embodiments of the present disclosure may include a digital-to-analog converter 161 and an amplifier 165.

[0232] The digital-to-analog converter 161 can convert the first mixed signal and the second mixed signal provided from the mixing circuit 150 into a first analog signal and a second analog signal, respectively, and can output the first analog signal and the second analog signal.

[0233] Amplifier 165 can amplify the first analog signal and the second analog signal provided from digital-to-analog converter 161 into a first drive signal and a second drive signal. The first drive signal and the second drive signal can be provided to the first vibration part 20A and the second vibration part 20B respectively via the pad portion at the active vibration member 20 through signal cable 27.

[0234] According to the first embodiment of this disclosure, the driving device 100 can provide a delayed bass-tone vocal cord driving signal to each of the first vibrating portion 20A and the second vibrating portion 20B laid on the active vibrating member 20, and therefore, the active vibrating member 20 can vibrate in a modal shape, or the modal shape of the active vibrating member 20 can be corrected to enhance the sound pressure level characteristics of the active vibrating member 20, thereby enhancing the sound pressure level characteristics and / or sound characteristics of the bass-tone vocal cords and expanding the bass-tone vocal cords.

[0235] Figure 11 This is a block diagram illustrating a drive device according to a second embodiment of the present disclosure. Figure 11 The above references are illustrated. Figure 8 or Figure 9 The driving device described in the second or third embodiment of the present disclosure.

[0236] Reference Figure 11 According to the second embodiment of the present disclosure, the driving device 100 may include a signal separation circuit 110, a filter circuit 130, a correction circuit 140, a mixing circuit 150, and a driving signal generator 160.

[0237] The signal separation circuit 110 can be configured, based on the control of the host controller, to separate the input signal IS into a low-pitched vocal band signal and a high-pitched vocal band signal. For example, the signal separation circuit 110 can separate the input signal into a first-pitched vocal band and a second-pitched vocal band different from the first-pitched vocal band, and can output signals of the first-pitched vocal band and the second-pitched vocal band. For example, the signal separation circuit 110 can be configured to separate the input signal into a low-pitched vocal band signal and a high-pitched vocal band signal for 500Hz. For example, the signal separation circuit 110 can be configured to separate the input signal into a first-pitched vocal band and a second-pitched vocal band for 500Hz. For example, the signal separation circuit 110 may include one or more frequency divider circuits.

[0238] The filter circuit 130 can output a first high-pitched vocal band signal to a fourth high-pitched vocal band signal based on the high-pitched vocal band signal provided by the signal separation circuit 110. For example, the filter circuit 130 can process the high-pitched vocal band signal provided by the signal separation circuit 110 to output a first high-pitched vocal band signal to a fourth high-pitched vocal band signal. The filter circuit 130 can also output a first low-pitched vocal band signal to a fourth low-pitched vocal band signal based on the low-pitched vocal band signal provided by the signal separation circuit 110. For example, the filter circuit 130 can filter the low-pitched vocal band signal provided by the signal separation circuit 110 to output a first low-pitched vocal band signal to a fourth low-pitched vocal band signal.

[0239] The filter circuit 130 can time-delay the high-pitched vocal signal provided by the signal separation circuit 110 to output the first high-pitched vocal signal to the fourth high-pitched vocal signal. The filter circuit 130 can time-delay the low-pitched vocal signal provided by the signal separation circuit 110 to output the first low-pitched vocal signal to the fourth low-pitched vocal signal.

[0240] The filter circuit 130 according to embodiments of the present disclosure may include a first treble filter to a fourth treble filter 131, 132, 133 and 134, and a first bass filter to a fourth bass filter 135, 136, 137 and 138.

[0241] The first high-pitched filter 131 can delay (or delay by) a first high-pitched delay time the high-pitched vocal signal provided from the signal separation circuit 110 to output a first high-pitched vocal signal. The second high-pitched filter 132 can delay (or delay by) a second high-pitched delay time the high-pitched vocal signal provided from the signal separation circuit 110 to output a second high-pitched vocal signal. The third high-pitched filter 133 can delay (or delay by) a third high-pitched delay time the high-pitched vocal signal provided from the signal separation circuit 110 to output a third high-pitched vocal signal. The fourth high-pitched filter 134 can delay (or delay by) a fourth high-pitched delay time the high-pitched vocal signal provided from the signal separation circuit 110 to output a fourth high-pitched vocal signal.

[0242] References above Figure 10 The description is similar, and for the input signal IS, each of the first to fourth high-frequency delay times can be adjusted to be equal or different within 0ms to 10ms, but the embodiments of this disclosure are not limited thereto.

[0243] The first bass filter 135 can delay (or delay by a first bass delay time) the bass-tone signal provided from the signal separation circuit 110, and can output the first bass-tone signal. The second bass filter 136 can delay (or delay by a second bass delay time) the bass-tone signal provided from the signal separation circuit 110, and can output the second bass-tone signal. The third bass filter 137 can delay (or delay by a third bass delay time) the bass-tone signal provided from the signal separation circuit 110, and can output the third bass-tone signal. The fourth bass filter 138 can delay (or delay by a fourth bass delay time) the bass-tone signal provided from the signal separation circuit 110, and can output the fourth bass-tone signal.

[0244] References above Figure 10 The description is similar; for the input signal IS, each of the first to fourth bass delay times can be adjusted to be different from each other within 30 ms. According to an embodiment of this disclosure, the first and third bass delay times can be adjusted to be equal or different. The second and fourth bass delay times can be adjusted to be equal or different. According to another embodiment of this disclosure, [the description continues with further details]. Figure 10 The description is similar, and each of the first to fourth bass delay times can be adjusted to have a time difference in the range of 0.1ms to 30ms.

[0245] The correction circuit 140 can be configured to correct the sound quality of each of the first high-pitched vocal band signals to the fourth high-pitched vocal band signals and the first low-pitched vocal band signals to the fourth low-pitched vocal band signals provided from the filter circuit 130. For example, the correction circuit 140 can correct each of the first high-pitched vocal band signals to the fourth high-pitched vocal band signals and the first low-pitched vocal band signals to the fourth low-pitched vocal band signals to output the first high-pitched vocal band correction signal to the fourth high-pitched vocal band correction signal and the first low-pitched vocal band correction signal to the fourth low-pitched vocal band correction signal.

[0246] According to embodiments of this disclosure, relative to a reference level, the correction circuit 140 can reduce or amplify the frequency range of each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal and the first low-pitched vocal band signal to the fourth low-pitched vocal band signal. Therefore, the sound quality of each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal and the first low-pitched vocal band signal to the fourth low-pitched vocal band signal can be enhanced, or its flatness can be improved, and a quality-enhanced signal or a flattened signal can be output. For example, relative to a frequency-based reference sound pressure level, the correction circuit 140 can amplify or attenuate each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal and the first low-pitched vocal band signal to the fourth low-pitched vocal band signal. For example, the correction circuit 140 can be configured to amplify each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal up to a maximum of 3 dB (+3 dB).

[0247] The correction circuit 140 according to embodiments of the present disclosure may include a first treble correction circuit to a fourth treble correction circuit 141, 142, 143 and 144, and a first bass correction circuit to a fourth bass correction circuit 145, 146, 147 and 148.

[0248] A first treble correction circuit 141 can amplify or attenuate a first treble-tone vocal cord signal relative to a frequency-based reference level to output a first treble-tone vocal cord correction signal. A second treble correction circuit 142 can amplify or attenuate a second treble-tone vocal cord signal relative to a frequency-based reference level to output a second treble-tone vocal cord correction signal. A third treble correction circuit 143 can amplify or attenuate a third treble-tone vocal cord signal relative to a frequency-based reference level to output a third treble-tone vocal cord correction signal. A fourth treble correction circuit 144 can amplify or attenuate a fourth treble-tone vocal cord signal relative to a frequency-based reference level to output a fourth treble-tone vocal cord correction signal.

[0249] According to embodiments of the present disclosure, each of the first to fourth treble correction circuits 141, 142, 143, and 144 can be configured to amplify the corresponding treble tone signal up to 3 dB (+3 dB). For example, each of the first to fourth treble correction circuits 141, 142, 143, and 144 can be a parametric equalizer, but embodiments of the present disclosure are not limited thereto.

[0250] According to another embodiment of this disclosure, when Figure 10 The drive device 200 illustrated in the example can direct to Figure 8 The second active vibrating member 40 illustrated in the diagram provides a drive signal, and when high sound pressure level characteristics of the low-pitched vocal cords and high-pitched characteristics are required, the third treble correction circuit 143 can completely attenuate the third treble vocal cord signal relative to a minimum level below a frequency-based reference level, and may not output a third treble vocal cord correction signal. Similarly, the fourth treble correction circuit 144 can completely attenuate the fourth treble vocal cord signal relative to a minimum level below a frequency-based reference level, and may not output a fourth treble vocal cord correction signal, but embodiments of this disclosure are not limited thereto.

[0251] According to another embodiment of this disclosure, when Figure 10 The drive device 200 illustrated in the example can direct to Figure 9 The second active vibrating member 40 illustrated in the diagram provides a drive signal, and when high sound pressure level characteristics of the low-pitched vocal cords and high-pitched characteristics are required, the third treble correction circuit 143 can completely attenuate the third treble vocal cord signal for a minimum level below the frequency-based reference level, and may not output a third treble vocal cord correction signal. Similarly, for a minimum level below the frequency-based reference level, the fourth treble correction circuit 144 can completely attenuate the fourth treble vocal cord signal, and may not output a fourth treble vocal cord correction signal, but embodiments of this disclosure are not limited thereto.

[0252] A first bass correction circuit 145 can amplify or attenuate a first bass tone signal relative to a frequency-based reference level to output a first bass tone correction signal. A second bass correction circuit 146 can amplify or attenuate a second bass tone signal relative to a frequency-based reference level to output a second bass tone correction signal. A third bass correction circuit 147 can amplify or attenuate a third bass tone signal relative to a frequency-based reference level to output a third bass tone correction signal. A fourth bass correction circuit 148 can amplify or attenuate a fourth bass tone signal relative to a frequency-based reference level to output a fourth bass tone correction signal. For example, each of the first to fourth bass correction circuits 145, 146, 147, and 148 can be a parametric equalizer, but embodiments of this disclosure are not limited thereto.

[0253] The drive device 200 according to the second embodiment of this disclosure may further include a level adjustment circuit 120 for reducing, preventing or minimizing the overshoot of the signal amplification of the correction circuit 140, or for performing anti-phase drive between the first active vibrating member and the second active vibrating member.

[0254] The level adjustment circuit 120 can attenuate the level of each of the high-pitched vocal signals and low-pitched vocal signals provided by the signal separation circuit 110 based on the gain value, and can output the attenuated signal to the filter circuit 130. Additionally, the level adjustment circuit 120 can adjust one or more of the phase and amplitude of each of the high-pitched vocal signals and low-pitched vocal signals provided by the signal separation circuit 110 based on the gain value, and can output the adjusted signal to the filter circuit 130.

[0255] The level adjustment circuit 120 may include a first high-frequency level adjustment circuit 121 and a second high-frequency level adjustment circuit 122, as well as a first low-frequency level adjustment circuit 125 and a second low-frequency level adjustment circuit 126.

[0256] The first treble level adjustment circuit 121 can attenuate the level of the treble vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the attenuated signal to each of the first treble filter 131 and the second treble filter 132 of the filter circuit 130. The first treble level adjustment circuit 121 can adjust one or more of the phase and amplitude of the treble vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the adjusted signal to each of the first treble filter 131 and the second treble filter 132 of the filter circuit 130.

[0257] The second treble level adjustment circuit 122 can attenuate the level of the treble vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the attenuated signal to each of the third treble filter 133 and the fourth treble filter 134 of the filter circuit 130. The second treble level adjustment circuit 122 can adjust one or more of the phase and amplitude of the treble vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the adjusted signal to each of the third treble filter 133 and the fourth treble filter 134 of the filter circuit 130.

[0258] The first bass level adjustment circuit 125 can attenuate the level of the bass-tone vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the attenuated signal to each of the first bass filter 135 and the second bass filter 136 of the filter circuit 130. The first bass level adjustment circuit 125 can adjust one or more of the phase and amplitude of the bass-tone vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the adjusted signal to each of the first bass filter 135 and the second bass filter 136 of the filter circuit 130.

[0259] The second bass level adjustment circuit 126 can attenuate the level of the bass-tone vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the attenuated signal to each of the third bass filter 137 and the fourth bass filter 138 of the filter circuit 130. The second bass level adjustment circuit 126 can adjust one or more of the phase and amplitude of the bass-tone vocal signal provided from the signal separation circuit 110 based on a gain value, and can output the adjusted signal to each of the third bass filter 137 and the fourth bass filter 138 of the filter circuit 130.

[0260] According to embodiments of this disclosure, when Figure 10 The drive device 200 shown can direct to Figure 8 The second active vibrating member 40 shown provides a driving signal, and when high sound pressure level and high-pitched sound characteristics of the low-pitched vocal cords are required, the second high-pitched level adjustment circuit 122 can invert the high-pitched vocal cord signal provided by the signal separation circuit 110 based on a gain value of -2, and can output the inverted high-pitched vocal cord signal to each of the third high-pitched filter 133 and the fourth high-pitched filter 134. Therefore, the second active vibrating member 40 can be displaced (or vibrated or driven) in the same direction as the first active vibrating member 20, thereby increasing the high sound pressure level and / or sound characteristics of the low-pitched vocal cords.

[0261] According to another embodiment of this disclosure, when Figure 10 The drive device 200 shown can direct to Figure 9The second active vibrating member 40 shown provides a driving signal, and when high sound pressure level characteristics and high-frequency characteristics of the bass vocal cords are required, the second high-frequency level adjustment circuit 122 can invert the high-frequency vocal cord signal provided by the signal separation circuit 110 based on a gain value of -2, and can output the inverted high-frequency vocal cord signal to each of the third high-frequency filter 133 and the fourth high-frequency filter 134. Therefore, the first vibrating part 20A of the second active vibrating member 40 can be displaced (or vibrated or driven) in the same direction as the first active vibrating member 20, thereby increasing the high sound pressure level characteristics and / or sound characteristics of the bass vocal cords. Additionally, the first high-pitched level adjustment circuit 121 can invert the high-pitched vocal band signal provided from the signal separation circuit 110 based on a gain value of -2, and can output the inverted high-pitched vocal band signal to each of the first high-pitched filter 131 and the second high-pitched filter 132. Therefore, the second vibrating portion 20B of the second active vibrating member 40 can be displaced (or vibrated or driven) in the same direction as the first active vibrating member 20, thereby increasing the high sound pressure level characteristics and / or sound characteristics of the low-pitched vocal band.

[0262] The mixing circuit 150 can mix and output a first high-pitched vocal cord correction signal provided by the first high-pitched correction circuit 141 and a first low-pitched vocal cord correction signal provided by the first low-pitched correction circuit 145. The mixing circuit 150 can also mix and output a second high-pitched vocal cord correction signal provided by the second high-pitched correction circuit 142 and a second low-pitched vocal cord correction signal provided by the second low-pitched correction circuit 146. Additionally, the mixing circuit 150 can mix and output a third high-pitched vocal cord correction signal provided by the third high-pitched correction circuit 143 and a third low-pitched vocal cord correction signal provided by the third low-pitched correction circuit 147. The mixing circuit 150 can also mix and output a fourth high-pitched vocal cord correction signal provided by the fourth high-pitched correction circuit 144 and a fourth low-pitched vocal cord correction signal provided by the fourth low-pitched correction circuit 148.

[0263] The hybrid circuit 150 according to embodiments of the present disclosure may include a first hybrid circuit to a fourth hybrid circuit 151, 152, 155 and 156.

[0264] The first mixing circuit 151 can mix the first high-pitched vocal cord correction signal provided by the first high-pitched correction circuit 141 of the correction circuit 140 and the first low-pitched vocal cord correction signal provided by the first low-pitched correction circuit 145 to generate a first mixed signal, and can provide the generated first mixed signal to the drive signal generator 160.

[0265] The second mixing circuit 152 can mix the second high-pitched vocal cord correction signal provided by the second high-pitched correction circuit 142 of the correction circuit 140 and the second low-pitched vocal cord correction signal provided by the second low-pitched correction circuit 146 to generate a second mixed signal, and can provide the generated second mixed signal to the drive signal generator 160.

[0266] The third mixing circuit 155 can mix the third high-pitched vocal correction signal provided by the third high-pitched vocal correction circuit 143 of the correction circuit 140 and the third low-pitched vocal correction signal provided by the third low-pitched vocal correction circuit 147 to generate a third mixed signal, and can provide the generated third mixed signal to the drive signal generator 160.

[0267] The fourth mixing circuit 156 can mix the fourth high-pitched vocal correction signal provided by the fourth high-pitched vocal correction circuit 144 of the correction circuit 140 and the fourth low-pitched vocal correction signal provided by the fourth low-pitched vocal correction circuit 148 to generate a fourth mixed signal, and can provide the generated fourth mixed signal to the drive signal generator 160.

[0268] The drive signal generator 160 can output a first drive signal based on a first mixed signal provided by the mixing circuit 150, and can output a second drive signal based on a second mixed signal provided by the mixing circuit 150. The drive signal generator 160 can output a third drive signal based on a third mixed signal provided by the mixing circuit 150, and can output a fourth drive signal based on a fourth mixed signal provided by the mixing circuit 150.

[0269] The drive signal generator 160 according to embodiments of the present disclosure may include a first digital-to-analog converter 161 and a second digital-to-analog converter 162, as well as a first amplifier 165 and a second amplifier 166.

[0270] The first digital-to-analog converter 161 can convert the first mixed signal and the second mixed signal provided from the mixing circuit 150 into a first analog signal and a second analog signal, respectively, and can output the first analog signal and the second analog signal.

[0271] The second digital-to-analog converter 162 can convert the third mixed signal and the fourth mixed signal provided from the mixing circuit 150 into a third analog signal and a fourth analog signal, respectively, and can output the third analog signal and the fourth analog signal.

[0272] The first amplifier 165 can amplify the first analog signal and the second analog signal provided from the first digital-to-analog converter 161 into a first drive signal and a second drive signal, respectively. The first drive signal and the second drive signal can be provided to the first vibration part 20A and the second vibration part 20B, respectively, via the signal cable 27 through the pad portion at the first active vibration member 20.

[0273] The second amplifier 166 can amplify the third analog signal and the fourth analog signal provided from the second digital-to-analog converter 162 into a third drive signal and a fourth drive signal, respectively. The third drive signal and the fourth drive signal can be provided to the first vibration part 20A and the second vibration part 20B, respectively, via the signal cable 27 through the pad portion at the second active vibration member 40.

[0274] According to the second embodiment of the present disclosure, the driving device 100 can provide a time-delayed bass-tone vocal cord driving signal to each of the first vibrating portion 20A and the second vibrating portion 20B laid on each of the first active vibrating member 20 and the second active vibrating member 40, thereby causing each of the first active vibrating member 20 and the second active vibrating member 40 to vibrate in a pattern shape, or to correct the pattern shape of each of the first active vibrating member 20 and the second active vibrating member 40 to enhance the sound pressure level characteristics of each of the first active vibrating member 20 and the second active vibrating member 40, thereby enhancing the sound pressure level characteristics and / or sound characteristics of the bass-tone vocal cord and expanding the bass-tone vocal cord, but the embodiments of the present disclosure are not limited thereto.

[0275] Figure 12 The sound output characteristics of a device according to an embodiment of the present disclosure and the sound output characteristics of a device according to an experimental example are illustrated. Figure 12 In the diagram, the horizontal axis represents frequency (Hz), and the vertical axis represents sound pressure level (SPL) (dB). Figure 12 In the diagram, the thick solid line represents configuring the sound output characteristics of the device by delaying the drive signal applied to each of the first and second vibrating parts of the active vibrating member, while the solid line represents configuring the sound output characteristics of the device without delaying the drive signal applied to each of the first and second vibrating parts of the active vibrating member.

[0276] like Figure 12 As can be seen from the thick solid line, compared to the solid line, the sound pressure level increases in the low-pitched vocal band below 250Hz, and the flatness of the entire frequency range is improved, and therefore, the peak value is reduced.

[0277] Therefore, the device according to the embodiments of the present disclosure can delay the driving signal applied to each of the first and second vibrating portions of the active vibrating member, thereby enhancing the sound pressure level characteristics and / or sound characteristics of the low-pitched vocal cords, and enhancing flatness.

[0278] The apparatus according to embodiments of the present disclosure will now be described.

[0279] The device according to embodiments of the present disclosure may include: a passive vibrating member; an active vibrating member including a first vibrating portion and a second vibrating portion connected to and arranged in parallel with the passive vibrating member; and a driving device that applies a first driving signal to the first vibrating portion and a second driving signal to the second vibrating portion based on an input signal; the driving device may include: a signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal; a filter circuit that outputs a first high-pitched vocal cord signal and a second high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal and a second low-pitched vocal cord signal based on the low-pitched vocal cord signal; and a correction circuit. It corrects the sound quality of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal, as well as the first low-pitched vocal cord signal and the second low-pitched vocal cord signal, to output a first high-pitched vocal cord correction signal, a second high-pitched vocal cord correction signal, a first low-pitched vocal cord correction signal, and a second low-pitched vocal cord correction signal; a mixing circuit that mixes the first high-pitched vocal cord correction signal with the first low-pitched vocal cord correction signal to generate a first mixed signal, and mixes the second high-pitched vocal cord correction signal with the second low-pitched vocal cord correction signal to generate a second mixed signal; and a drive signal generator that outputs a first drive signal based on the first mixed signal and outputs a second drive signal based on the second mixed signal.

[0280] According to some embodiments of this disclosure, the filter circuit can delay the bass tone signal to output a first bass tone signal, and can also delay the bass tone signal to output a second bass tone signal.

[0281] According to some embodiments of this disclosure, the filter circuit can delay the bass tone signal by a first bass delay time to output a first bass tone signal, and can delay the bass tone signal by a second bass delay time different from the first bass delay time to output a second bass tone signal.

[0282] According to some embodiments of this disclosure, each of the first bass delay time and the second bass delay time can be less than 30ms relative to the input signal.

[0283] According to some embodiments of this disclosure, the filter circuit can delay the high-pitched vocal cord signal to output a first high-pitched vocal cord signal, and can delay the high-pitched vocal cord signal to output a second high-pitched vocal cord signal, and the delay time of the first high-pitched vocal cord signal relative to the input signal can be equal to or different from the delay time of the second high-pitched vocal cord signal.

[0284] According to some embodiments of this disclosure, the delay time of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal relative to the input signal can be in the range of 0 ms to 10 ms.

[0285] According to some embodiments of this disclosure, the correction signal can be configured to amplify each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal up to a maximum of 3 dB (+3 dB).

[0286] According to some embodiments of this disclosure, the driving device may further include a level adjustment circuit that attenuates the levels of the high-pitched vocal signal and the low-pitched vocal signal based on a gain value, and provides the attenuated signal to a filter circuit.

[0287] An apparatus according to one embodiment of the present disclosure may include: a passive vibrating member; a first active vibrating member including a first vibrating portion and a second vibrating portion connected to a first surface of the passive vibrating member and arranged in parallel; a second active vibrating member including a third vibrating portion and a fourth vibrating portion, the third vibrating portion and the fourth vibrating portion being connected to the second surface of the passive vibrating member and arranged in parallel to overlap with at least a portion of the first active vibrating member; and a driving device that applies a first driving signal to a fourth driving signal to the first vibrating portion to the fourth vibrating portion respectively based on an input signal; the driving device may include: a signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal; a filter circuit that outputs a first high-pitched vocal cord signal to a fourth high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal to a fourth low-pitched vocal cord signal based on the low-pitched vocal cord signal; and a correction circuit that corrects the first high-pitched vocal cord signal. The signal quality of each of the first to fourth high-pitched vocal band signals and the first low-pitched vocal band signals is evaluated to output the first high-pitched vocal band correction signal to the fourth high-pitched vocal band correction signal and the first low-pitched vocal band correction signal to the fourth low-pitched vocal band correction signal; a mixing circuit that mixes the first high-pitched vocal band correction signal with the first low-pitched vocal band correction signal to generate a first mixed signal, mixes the second high-pitched vocal band correction signal with the second low-pitched vocal band correction signal to generate a second mixed signal, mixes the third high-pitched vocal band correction signal with the third low-pitched vocal band correction signal to generate a third mixed signal, and mixes the fourth high-pitched vocal band correction signal with the fourth low-pitched vocal band correction signal to generate a fourth mixed signal; and a drive signal generator that outputs a first drive signal based on the first mixed signal, outputs a second drive signal based on the second mixed signal, outputs a third drive signal based on the third mixed signal, and outputs a fourth drive signal based on the fourth mixed signal.

[0288] According to some embodiments of this disclosure, the filter circuit can delay the bass tone signal to output a first bass tone signal, delay the bass tone signal to output a second bass tone signal, delay the bass tone signal to output a third bass tone signal, and delay the bass tone signal to output a fourth bass tone signal.

[0289] According to some embodiments of this disclosure, the filter circuit can delay the bass tone signal by a first bass delay time to output a first bass tone signal; it can delay the bass tone signal by a second bass delay time different from the first bass delay time to output a second bass tone signal; it can delay the bass tone signal by a third bass delay time to output a third bass tone signal; and it can delay the bass tone signal by a fourth bass delay time different from the third bass delay time to output a fourth bass tone signal.

[0290] According to some embodiments of this disclosure, each of the first bass delay time and the second bass delay time may be less than 30 ms relative to the input signal, or each of the third bass delay time and the fourth bass delay time may be less than 30 ms relative to the input signal.

[0291] According to some embodiments of this disclosure, the first bass delay time may be equal to or different from the third bass delay time, and the second bass delay time may be equal to or different from the fourth bass delay time.

[0292] According to some embodiments of this disclosure, the correction circuit can completely attenuate each of the third high-pitched vocal cord signal and the fourth high-pitched vocal cord signal.

[0293] According to some embodiments of this disclosure, the filter circuit may include: a first treble filter that outputs a first treble vocal cord signal based on a treble vocal cord signal; a second treble filter that outputs a second treble vocal cord signal based on a treble vocal cord signal; a third treble filter that outputs a third treble vocal cord signal based on a treble vocal cord signal; a fourth treble filter that outputs a fourth treble vocal cord signal based on a treble vocal cord signal; a first bass filter that outputs a first bass vocal cord signal based on a bass vocal cord signal; a second bass filter that outputs a second bass vocal cord signal based on a bass vocal cord signal; a third bass filter that outputs a third bass vocal cord signal based on a bass vocal cord signal; and a fourth bass filter that outputs a fourth bass vocal cord signal based on a bass vocal cord signal.

[0294] According to some embodiments of this disclosure, the driving device may further include a level adjustment circuit, which may include: a first treble level adjustment circuit that attenuates the level of a treble vocal signal based on a gain value to provide the level-adjusted treble vocal signal to a first treble filter and a second treble filter; a second treble level adjustment circuit that attenuates the level of a treble vocal signal based on a gain value to provide the level-adjusted treble vocal signal to a third treble filter and a fourth treble filter; a first bass level adjustment circuit that attenuates the level of a bass vocal signal based on a gain value to provide the level-adjusted bass vocal signal to a first bass filter and a second bass filter; and a second bass level adjustment circuit that attenuates the level of a bass vocal signal based on a gain value to provide the level-adjusted bass vocal signal to a third bass filter and a fourth bass filter.

[0295] According to some embodiments of this disclosure, the second high-frequency level adjustment circuit can invert the high-frequency vocal signal based on the gain value and provide the inverted high-frequency vocal signal to the third and fourth high-frequency filters.

[0296] According to some embodiments of the present disclosure, each of the first vibration portion and the second vibration portion may include: a vibration layer comprising a plurality of inorganic material portions and a plurality of organic material portions located between the plurality of inorganic material portions; a first electrode layer located on a first surface of the vibration layer; and a second electrode layer located on a second surface of the vibration layer that is different from the first surface.

[0297] According to some embodiments of this disclosure, the passive vibrating component may include one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, carbon, and mirror.

[0298] According to some embodiments of this disclosure, the passive vibration component includes one or more of the following: a display panel including pixels configured to display images, a screen panel on which images are projected from a display device, a light-emitting diode illumination panel, an organic light-emitting illumination panel, an inorganic light-emitting illumination panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors.

[0299] The vibration device according to embodiments of this disclosure can be applied to vibration devices installed in devices. Devices according to embodiments of this disclosure can be applied to mobile devices, video phones, smartwatches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved surface devices, sliding devices, variable devices, electronic notebooks, e-books, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop personal computers (PCs), laptop PCs, netbooks, workstations, navigation devices, vehicle navigation devices, vehicle display devices, vehicle equipment, cinema equipment, cinema display devices, TVs, wallpaper display devices, signage devices, gaming devices, laptop computers, monitors, cameras, camcorders, home appliances, etc. Additionally, devices (or vibration devices) according to some embodiments of this disclosure can be applied to organic light-emitting lighting devices or inorganic light-emitting lighting devices. When the device (or vibration device) is applied to a lighting device, the device (or the vibration device) can function as both a illuminator and a speaker. Furthermore, when the device (or vibration device) of some embodiments of this disclosure is applied to mobile devices, etc., the device (or vibration device) can act as one or more of a speaker, receiver, and tactile sensor, but the embodiments of this disclosure are not limited thereto.

[0300] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from the technical concept or scope thereof. Therefore, embodiments of this disclosure are intended to cover such modifications and variations, provided they fall within the scope of the appended claims and their equivalents.

[0301] Cross-references to related applications

[0302] This application claims the benefit and priority of Korean Patent Application No. 10-2021-0194788, filed on December 31, 2021, the entire contents of which are hereby expressly incorporated by reference as if fully set forth herein.

Claims

1. A vibration device, the vibration device comprising: Passive vibrating components; An active vibration component includes a first vibration part and a second vibration part, the first vibration part and the second vibration part being connected to the passive vibration component and arranged in parallel. as well as A driving device that applies a first driving signal to the first vibrating part and a second driving signal to the second vibrating part based on an input signal; The driving device includes: A signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal; A filter circuit that outputs a first high-pitched vocal cord signal and a second high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal and a second low-pitched vocal cord signal based on the low-pitched vocal cord signal. A correction circuit that corrects the sound quality of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal, as well as the first low-pitched vocal cord signal and the second low-pitched vocal cord signal, to output a first high-pitched vocal cord correction signal, a second high-pitched vocal cord correction signal, a first low-pitched vocal cord correction signal, and a second low-pitched vocal cord correction signal; A mixing circuit that mixes the first high-pitched vocal band correction signal with the first low-pitched vocal band correction signal to generate a first mixed signal, and mixes the second high-pitched vocal band correction signal with the second low-pitched vocal band correction signal to generate a second mixed signal; and A drive signal generator that outputs a first drive signal based on the first mixed signal and a second drive signal based on the second mixed signal.

2. The vibration device according to claim 1, wherein, The filter circuit delays the bass tone signal to output the first bass tone signal, and delays the bass tone signal to output the second bass tone signal.

3. The vibration device according to claim 1, wherein, The filter circuit delays the bass tone signal by a first bass delay time to output the first bass tone signal, and delays the bass tone signal by a second bass delay time different from the first bass delay time to output the second bass tone signal.

4. The vibration device according to claim 3, wherein, Each of the first bass delay time and the second bass delay time is less than 30ms relative to the input signal.

5. The vibration device according to claim 4, wherein, Relative to the input signal, each of the first bass delay time and the second bass delay time is adjusted to be different from each other within 30ms.

6. The vibration device according to claim 3, wherein, Each of the first bass delay time and the second bass delay time is adjusted to have a time difference in the range of 0.1ms to 30ms.

7. The vibration device according to claim 1, wherein, The filter circuit delays the high-pitched vocal cord signal to output the first high-pitched vocal cord signal, and delays the high-pitched vocal cord signal to output the second high-pitched vocal cord signal. The delay time of the first high-pitched vocal cord signal relative to the input signal is equal to or different from the delay time of the second high-pitched vocal cord signal.

8. The vibration device according to claim 7, wherein, The delay time of each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal relative to the input signal is 0 ms to 10 ms.

9. The vibration device according to claim 1, wherein, The correction signal is configured to amplify each of the first high-pitched vocal cord signal and the second high-pitched vocal cord signal by up to a maximum of 3 dB.

10. The vibration device according to claim 1, wherein, The driving device further includes a level adjustment circuit that attenuates the levels of the high-pitched vocal signal and the low-pitched vocal signal based on a gain value, and provides the attenuated signal to the filter circuit.

11. The vibration device according to claim 1, wherein, Each of the first vibration portion and the second vibration portion includes a first electrode layer and a second electrode layer, and The active vibration component further includes a first cover component and a second cover component. The first cover component is configured to be disposed on a first surface of each of the first vibration portion and the second vibration portion and together cover a first electrode layer of each of the first vibration portion and the second vibration portion. The second cover component is configured to be disposed on a second surface of each of the first vibration portion and the second vibration portion and together cover a second electrode layer of each of the first vibration portion and the second vibration portion.

12. The vibration device according to claim 11, wherein, The active vibration component further includes a first power line disposed at the first cover component, a second power line disposed at the second cover component, and a pad portion electrically connected to the first power line and the second power line.

13. The vibration device according to any one of claims 1 to 12, wherein, Each of the first vibration portion and the second vibration portion includes: A vibrating layer comprising multiple inorganic material portions and multiple organic material portions located between the multiple inorganic material portions; A first electrode layer, the first electrode layer being located at a first surface of the vibration layer; and A second electrode layer is located on a second surface of the vibration layer that is different from the first surface.

14. The vibration device according to any one of claims 1 to 12, wherein, The passive vibrating component includes one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, carbon, and mirror.

15. The vibration device according to any one of claims 1 to 12, wherein, The passive vibrating component includes one or more of the following: a display panel including pixels configured to display images, a screen panel that projects images from a display device onto it, a light-emitting diode lighting panel, an organic light-emitting lighting panel, an inorganic light-emitting lighting panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors.

16. A vibration device, the vibration device comprising: Passive vibrating components; A first active vibration component includes a first vibration portion and a second vibration portion, wherein the first vibration portion and the second vibration portion are connected to a first surface of the passive vibration component and arranged in parallel. The second active vibration member includes a third vibration portion and a fourth vibration portion, the third vibration portion and the fourth vibration portion being connected to the second surface of the passive vibration member and arranged in parallel to overlap with at least a portion of the first active vibration member. as well as A driving device that applies a first driving signal, a second driving signal, a third driving signal, and a fourth driving signal to the first to the fourth vibration parts respectively based on an input signal. The driving device includes: A signal separation circuit that separates the input signal into a low-pitched vocal cord signal and a high-pitched vocal cord signal; A filter circuit that outputs a first high-pitched vocal cord signal, a second high-pitched vocal cord signal, a third high-pitched vocal cord signal, and a fourth high-pitched vocal cord signal based on the high-pitched vocal cord signal, and outputs a first low-pitched vocal cord signal, a second low-pitched vocal cord signal, a third low-pitched vocal cord signal, and a fourth low-pitched vocal cord signal based on the low-pitched vocal cord signal. A correction circuit that corrects the sound quality of each of the first high-pitched vocal band signal to the fourth high-pitched vocal band signal and the first low-pitched vocal band signal to the fourth low-pitched vocal band signal, so as to output the first high-pitched vocal band correction signal to the fourth high-pitched vocal band correction signal and the first low-pitched vocal band correction signal to the fourth low-pitched vocal band correction signal. A mixing circuit that mixes the first high-pitched vocal band correction signal with the first low-pitched vocal band correction signal to generate a first mixed signal, mixes the second high-pitched vocal band correction signal with the second low-pitched vocal band correction signal to generate a second mixed signal, mixes the third high-pitched vocal band correction signal with the third low-pitched vocal band correction signal to generate a third mixed signal, and mixes the fourth high-pitched vocal band correction signal with the fourth low-pitched vocal band correction signal to generate a fourth mixed signal; and A drive signal generator that outputs a first drive signal based on a first mixed signal, outputs a second drive signal based on a second mixed signal, outputs a third drive signal based on a third mixed signal, and outputs a fourth drive signal based on a fourth mixed signal.

17. The vibration device according to claim 16, wherein, The filter circuit: The low-pitched vocal signal is delayed to output the first low-pitched vocal signal. The low-pitched vocal signal is delayed to output the second low-pitched vocal signal. The bass-tone signal is delayed to output the third bass-tone signal, and The low-pitched vocal cord signal is delayed to output the fourth low-pitched vocal cord signal.

18. The vibration device according to claim 16, wherein, The filter circuit: The bass tone signal is delayed by a first bass delay time to output the first bass tone signal. The bass tone signal is delayed by a second bass delay time, different from the first bass delay time, to output the second bass tone signal. The bass tone signal is delayed by a third bass delay time to output the third bass tone signal, and The bass tone signal is delayed by a fourth bass delay time, which is different from the third bass delay time, to output the fourth bass tone signal.

19. The vibration device according to claim 18, wherein, Relative to the input signal, each of the first bass delay time and the second bass delay time is less than 30ms, or Each of the third bass delay time and the fourth bass delay time is less than 30ms relative to the input signal.

20. The vibration device according to claim 18, wherein, The first bass delay time is equal to or different from the third bass delay time, and The second bass delay time may be equal to or different from the fourth bass delay time.

21. The vibration device according to claim 16, wherein, The correction circuit completely attenuates each of the third high-pitched vocal cord signal and the fourth high-pitched vocal cord signal.

22. The vibration device according to claim 16, wherein, The filter circuit includes: A first high-pitched filter, which outputs the first high-pitched vocal cord signal based on the high-pitched vocal cord signal; A second high-pitched filter outputs a second high-pitched vocal cord signal based on the high-pitched vocal cord signal; A third high-pitched filter, which outputs the third high-pitched vocal cord signal based on the high-pitched vocal cord signal; A fourth high-pitched filter outputs a fourth high-pitched vocal cord signal based on the high-pitched vocal cord signal; A first bass filter, which outputs a first bass tone signal based on the bass tone vocal cord signal; A second bass filter, which outputs a second bass tone signal based on the bass tone vocal cord signal; A third bass filter, which outputs a third bass tone signal based on the bass tone vocal band signal; and A fourth bass filter that outputs the fourth bass tone signal based on the bass tone vocal band signal.

23. The vibration device according to claim 22, wherein, The driving device also includes a level adjustment circuit, and The level adjustment circuit includes: A first high-frequency level adjustment circuit attenuates the level of the high-frequency vocal signal based on a gain value, so as to provide the level-adjusted high-frequency vocal signal to the first high-frequency filter and the second high-frequency filter. A second treble level adjustment circuit attenuates the level of the treble vocal signal based on a gain value, so as to provide the level-adjusted treble vocal signal to the third and fourth treble filters. A first bass level adjustment circuit attenuates the bass tone signal based on a gain value, providing the level-adjusted bass tone signal to the first bass filter and the second bass filter; and A second bass level adjustment circuit attenuates the level of the bass tone signal based on a gain value, so as to provide the level-adjusted bass tone signal to the third bass filter and the fourth bass filter.

24. The vibration device according to claim 23, wherein, The second high-frequency level adjustment circuit inverts the high-frequency vocal signal based on the gain value and provides the inverted high-frequency vocal signal to the third and fourth high-frequency filters.

25. The vibration device according to any one of claims 16 to 24, wherein, Each of the first vibration portion and the second vibration portion includes: A vibrating layer comprising multiple inorganic material portions and multiple organic material portions located between the multiple inorganic material portions; A first electrode layer, the first electrode layer being located at a first surface of the vibration layer; and A second electrode layer is located on a second surface of the vibration layer that is different from the first surface.

26. The vibration device according to any one of claims 16 to 24, wherein, The passive vibrating component includes one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, carbon, and mirror.

27. The vibration device according to any one of claims 16 to 24, wherein, The passive vibrating component includes one or more of the following: a display panel including pixels configured to display images, a screen panel that projects images from a display device onto it, a light-emitting diode lighting panel, an organic light-emitting lighting panel, an inorganic light-emitting lighting panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors.

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