Vibrating device and sound device comprising the vibrating device

Abstract

The present disclosure relates to a vibration device and a sound device including the same. A vibration device includes a vibration means. The vibration means includes a vibration portion including a piezoelectric material, a first electrode portion located at a first surface of the vibration portion and configured as a plurality of circular patterns, and a second electrode portion located at a second surface of the vibration portion different from the first surface and configured as a single electrode, and the vibration means generates an ultrasonic wave.

Description

Technical Field

[0001] This disclosure relates to a vibration device and a sound device including the vibration device. Background Technology

[0002] The equipment includes a separate speaker or sound device that provides sound. When a speaker is installed in the equipment, it occupies space, thus limiting the design and spatial arrangement of the equipment.

[0003] A loudspeaker used in a device can be, for example, an actuator that includes a magnet and a coil. However, when an actuator is used in a device, its thickness increases. Therefore, piezoelectric elements for achieving thinness have attracted much attention.

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

[0005] In addition, ultrasonic piezoelectric devices with a quadrilateral shape have the disadvantage of being difficult to control the resonant frequency when using vibration mode, and also have the disadvantage of relatively weak vibration because ultrasonic vibration is transmitted through a vibrating plate. Summary of the Invention

[0006] Therefore, the inventors have recognized the aforementioned problems and have conducted various experiments to realize a vibration device that can enhance sound quality and sound pressure level characteristics. Through these experiments, the inventors have invented a new vibration device and a device incorporating this vibration device, which can enhance sound quality and resonance control characteristics.

[0007] One aspect of this disclosure aims to provide a vibration device and an apparatus including the vibration device, wherein the manufacturing method is simplified and resonance control is possible.

[0008] Therefore, embodiments of this disclosure relate to an apparatus that substantially eliminates one or more of the problems caused by the limitations and disadvantages of related technologies.

[0009] Additional features and aspects will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the inventive concept provided herein. Other features and aspects of the inventive concept may be realized and obtained by structures particularly pointed out in the written description or from which they may be derived, as well as by the claims and drawings.

[0010] To achieve these and other aspects of the inventive concept, as embodied and broadly described herein, a vibration device includes a vibration apparatus comprising: a vibration portion comprising a piezoelectric material; a first electrode portion located at a first surface of the vibration portion and configured as a plurality of circular patterns; and a second electrode portion located at a second surface of the vibration portion, different from the first surface and configured as a single electrode, and the vibration apparatus generates ultrasonic waves.

[0011] On the other hand, a vibration device includes a vibration apparatus comprising: a vibrating part comprising a piezoelectric material; an ultrasonic electrode part located on a first surface of the vibrating part and configured in a plurality of circular patterns; a sound electrode part configured to surround the ultrasonic electrode part; and a second electrode part located on a second surface of the vibrating part different from the first surface and configured as a single electrode, the vibration apparatus generating a first sound and a second sound, wherein the first sound is ultrasonic and the second sound has an audible frequency.

[0012] On the other hand, a vibration device includes a vibration apparatus comprising: a vibration part comprising a piezoelectric material; a finger-shaped first electrode part located at a first surface of the vibration part; and a finger-shaped acoustic electrode part located at a second surface of the vibration part different from the first surface, the first electrode part comprising a first engraved pattern, the second electrode part comprising a second engraved pattern, the first engraved pattern and the second engraved pattern constituting a plurality of circular patterns, and the vibration apparatus generating ultrasonic waves.

[0013] On the other hand, an apparatus includes: a vibrating object; a vibration generating device located at the vibrating object; and a connecting member located between the vibrating object and the vibration generating device, the vibration generating device including the aforementioned vibrating device.

[0014] The vibration device according to one embodiment of the present disclosure can be manufactured into an array type through a simple process, providing an ultrasonic vibration device capable of large-area resonant point control, and the vibration device according to one embodiment of the present disclosure can be applied as a large-area display device, an ultrasonic generator, a sensor, etc.

[0015] Other systems, methods, features, and advantages will be apparent or will become apparent to those skilled in the art upon studying the following figures and detailed description. All such additional systems, methods, features, and advantages are included in this specification, fall within the scope of this disclosure, and are 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 aspects of this disclosure.

[0016] It should be understood that 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 disclosure.

[0017] Appendix 1. A vibration device, the vibration device comprising:

[0018] Vibration device

[0019] The vibration device includes:

[0020] The vibrating part includes a piezoelectric material;

[0021] A first electrode portion, located at a first surface of the vibrating portion and configured in a plurality of circular patterns; and

[0022] The second electrode portion is located on a second surface of the vibrating portion that is different from the first surface.

[0023] Appendix 2. The vibration equipment described in Appendix 1,

[0024] The vibration device generates ultrasonic waves.

[0025] Note 3. The vibration equipment according to Note 1,

[0026] The plurality of circular patterns are configured to have the same radius, and

[0027] The resonant frequency of the vibration device has a resonant point.

[0028] Appendix 4. The vibration device according to Appendix 1, wherein the vibration device further includes:

[0029] The circuit section, located at the first surface of the vibrating part; and

[0030] The pad portion is located on one side of the vibrating part, and

[0031] The circuit section connects the first electrode section to the pad section.

[0032] Note 5. According to the vibration device described in Note 1, the vibration device further includes:

[0033] A first cover member, the first cover member being located at a first surface of the vibration device; and

[0034] The second cover member is located on a second surface of the vibration device that is different from the first surface.

[0035] Note 6. The vibration device according to Note 1, wherein the vibration device includes at least two regions configured to be driven independently.

[0036] Note 7. The vibration equipment according to Note 6,

[0037] The vibration device includes:

[0038] A first pad portion located in a first region and a plurality of first electrode portions connected to the first pad portion;

[0039] A second pad portion located in the second region and a plurality of first electrode portions connected to the second pad portion;

[0040] A third pad portion located in the third region and a plurality of first electrode portions connected to the third pad portion; and

[0041] The fourth pad portion located in the fourth region and a plurality of first electrode portions connected to the fourth pad portion, and

[0042] The first electrode portions located in the first region to the fourth region are electrically disconnected from each other.

[0043] Note 8. The vibration equipment according to Note 7,

[0044] The vibration device further includes a wiring section located at the first surface of the vibrating part, and

[0045] The circuit section connects the first pad section to the fourth pad section to the first electrode section of the first region to the fourth region, respectively.

[0046] Note 9. According to Note 1, the vibration device further includes a vibration drive circuit.

[0047] The vibration drive circuit provides a first polarity signal to the first electrode and a second polarity signal to the second electrode.

[0048] Note 10. The vibration equipment according to Note 1,

[0049] The second electrode portion is configured as a single electrode.

[0050] Appendix 11. A vibration device, the vibration device comprising:

[0051] Vibration device

[0052] The vibration device includes:

[0053] The vibrating part includes a piezoelectric material;

[0054] An ultrasonic electrode portion, which is located on the first surface of the vibrating portion and is configured in a plurality of circular patterns;

[0055] Sound electrode portion, the sound electrode portion being configured to surround the ultrasonic electrode portion; and

[0056] The second electrode portion is located on a second surface of the vibrating portion that is different from the first surface and is configured as a single electrode.

[0057] The vibration device generates ultrasonic waves and a second sound with an audible frequency.

[0058] Note 12. The vibration equipment according to Note 11,

[0059] The plurality of circular patterns are configured to have the same radius, and

[0060] The resonant frequency of the vibration device has a resonant point.

[0061] Note 13. The vibration equipment according to Note 11,

[0062] The vibration device further includes:

[0063] The circuit section, located at the first surface of the vibrating part; and

[0064] An ultrasonic pad portion, wherein the ultrasonic pad portion is located on one side of the vibrating portion, and

[0065] The circuit section connects the ultrasonic electrode section to the ultrasonic pad section.

[0066] Note 14. The vibration device according to Note 11 further includes:

[0067] A first cover member, the first cover member being located at a first surface of the vibration device; and

[0068] The second cover member is located on a second surface of the vibration device that is different from the first surface.

[0069] Note 15. The vibration device according to Note 11, wherein the vibration part comprises:

[0070] A first vibration part, the first vibration part comprising a piezoelectric material and overlapping with the ultrasonic electrode part;

[0071] A second vibrating part, the second vibrating part being configured as an organic material part and surrounding the first vibrating part; and

[0072] The third vibration part includes a piezoelectric material and overlaps with the sound electrode part.

[0073] Appendix 16. A vibration device, the vibration device comprising:

[0074] Vibration device

[0075] The vibration device includes:

[0076] The vibrating part includes a piezoelectric material;

[0077] A finger-shaped first electrode portion, the first electrode portion being located at the first surface of the vibrating portion; and

[0078] A finger-shaped second electrode portion is located at the first surface of the vibrating portion.

[0079] The first electrode portion includes a first engraved pattern.

[0080] The second electrode portion includes a second engraved pattern.

[0081] The first engraved pattern and the second engraved pattern together form multiple circular patterns.

[0082] Note 17. The vibration equipment according to Note 16,

[0083] The vibration device generates ultrasonic waves.

[0084] Note 18. The vibration equipment according to Note 16,

[0085] The plurality of circular patterns are configured to have the same radius, and

[0086] The resonant frequency of the vibration device has a resonant point.

[0087] Note 19. The vibration device according to Note 16 further includes:

[0088] A first cover member, the first cover member being located at a first surface of the vibration device; and

[0089] The second cover member is located on a second surface of the vibration device that is different from the first surface.

[0090] Note 20. The vibration equipment according to Note 16,

[0091] The plurality of first electrode portions and the plurality of second electrode portions are joined together and spaced apart from each other along a first direction.

[0092] Note 21. The vibration equipment according to Note 20,

[0093] In this configuration, a first polarity signal is provided to the plurality of first electrode portions, and a second polarity signal is provided to the plurality of second electrode portions, such that vibration portions having a polarization direction parallel to the first direction and vibration portions having different polarization directions are arranged alternately and repeatedly along the first direction.

[0094] Appendix 22. A sound device, said sound device comprising:

[0095] Vibrating object;

[0096] A vibration generating device, the vibration generating device being located at the vibrating object; and

[0097] A connecting member, located between the vibrating object and the vibration generating device.

[0098] The vibration generating device includes the vibration device according to any one of Appendix 1 to 21.

[0099] Note 23. The sound device according to Note 22,

[0100] The vibrating object is a display panel comprising a plurality of pixels configured to display an image.

[0101] The display panel includes a first rear region and a second rear region, and

[0102] The vibration generating device includes:

[0103] A first vibration generating device is located in the first rear region of the display panel, and

[0104] The second vibration generating device is located in the second rear region of the display panel.

[0105] Note 24. The sound device according to Note 22 further includes a plate located between the vibrating object and the vibration generating device.

[0106] Note 25. The sound device according to Note 22, wherein the vibrating object includes one or more of the following: a display panel comprising a plurality of pixels configured to display an image, a screen panel on which an image is to be projected from a display device, a lighting panel, a sign panel, vehicle interior materials, vehicle windows, vehicle exterior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, wood, plastic, glass, metal, cloth, fiber, paper, rubber, leather, carbon, and mirrors. Attached Figure Description

[0107] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0108] Figure 1 This is a perspective view of a vibration device according to one embodiment of the present disclosure.

[0109] Figure 2 It is along Figure 1 The cross-sectional view taken from line I-I'.

[0110] Figure 3A This is a perspective view of a vibration device according to one embodiment of the present disclosure.

[0111] Figure 3B Show Figure 3A Region A.

[0112] Figure 4 This is a plan view of a vibration device according to one embodiment of the present disclosure.

[0113] Figure 5 A vibration drive circuit of a vibration device according to one embodiment of the present disclosure is shown.

[0114] Figure 6 This is a perspective view of a vibration device according to another embodiment of the present disclosure.

[0115] Figure 7 This is a plan view of a vibration device according to another embodiment of the present disclosure.

[0116] Figure 8 A vibration drive circuit for a vibration device according to another embodiment of the present disclosure is shown.

[0117] Figure 9A This is a perspective view of a vibration device according to another embodiment of the present disclosure.

[0118] Figure 9B Show Figure 9A Region B.

[0119] Figure 10 yes Figure 9A A three-dimensional view of the vibrating part.

[0120] Figure 11 This is a plan view of a vibration device according to another embodiment of the present disclosure.

[0121] Figure 12 This is a perspective view of a vibration device according to another embodiment of the present disclosure.

[0122] Figure 13 This is a plan view of a vibration device according to another embodiment of the present disclosure.

[0123] Figure 14A yes Figure 13 A three-dimensional view of the vibrating part.

[0124] Figure 14B It is along Figure 13 The cross-sectional view taken from line II-II'.

[0125] Figure 15 A vibration drive circuit for a vibration device according to another embodiment of the present disclosure is shown.

[0126] Figure 16 An apparatus according to one embodiment of the present disclosure is shown.

[0127] Figure 17 It is along Figure 16 The cross-sectional view taken from line III-III'.

[0128] Figure 18 It is along Figure 16 Another cross-sectional view taken from line III-III'.

[0129] Throughout the accompanying drawings and detailed embodiments, unless otherwise stated, the same reference numerals should be understood to denote the same elements, features, and structures. For clarity, illustration, and convenience, the relative dimensions and depictions of these elements may be exaggerated. Detailed Implementation

[0130] Descriptions of embodiments of the present disclosure will now be given in detail, examples of which are illustrated in the accompanying drawings. In the following description, detailed descriptions of well-known functions or configurations relevant to this document will be omitted where such obscuration unnecessarily obscures the essential points of the inventive concept. The described progression of processing steps and / or operations is illustrative; however, the order of steps and / or operations is not limited to the order set forth herein and can be varied as is known in the art, except for steps and / or operations that must occur in a specific order. The same reference numerals consistently denote the same elements. The names of the various elements used in the following description are chosen solely for convenience in writing the specification and may therefore differ from those used in actual products.

[0131] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make this disclosure thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0132] The shapes, dimensions, ratios, angles, and quantities disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore, this disclosure is not limited to the details shown. The same reference numerals always denote the same elements. In the following description, detailed descriptions that determine relevant known functions or configurations will be omitted where such descriptions unnecessarily obscure the essential points of this disclosure. When using the terms "comprising," "having," and "including" as described in this specification, another component may be added unless "only" is used. Unless otherwise specified, singular terms may include plural forms.

[0133] When interpreting a component, the component is interpreted as including a range of errors or tolerances, even if there is no explicit description of such a range of errors or tolerances.

[0134] When describing positional relationships, for example, when the positional relationship between two components is described as "above," "over," "below," and "beside," one or more other components may be placed between these two components, unless more restrictive terms such as "exactly" or "directly" are used. In the description of embodiments, when a structure is described as being "above" or "below" or "under" another structure, the description should be interpreted to include cases where these structures are in contact with each other and cases where a third structure is placed between them.

[0135] 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," or "directly" are used.

[0136] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only 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.

[0137] In describing the elements of this disclosure, the terms “first,” “second,” “A,” “B,” “(a),” “(b),” etc., may be used. These terms are intended to distinguish the corresponding element from other elements, and the basis, order, or number of the corresponding elements shall not be limited by these terms. With regard to the expression that an element or layer is “connected,” “joined,” or “attached” to another element or layer, unless otherwise stated, the element or layer may not only be directly connected, joined, or attached to another element or layer, but also indirectly connected, joined, or attached to another element or layer, with one or more intermediate elements or layers “set” or “inserted” therebetween.

[0138] The term "at least one" should be understood to include any and all combinations of one or more of the related listed items. For example, "at least one of the first, second, and third items" means a combination of all items drawn from two or more of the first, second, and third items, as well as the first, second, or third item.

[0139] The expressions "first element," "second element," and " / or" "third element" should be understood as one of the first element, the second element, and the third element, or any or all combinations of the first element, the second element, and the third element. For example, A, B, and / or C can refer to only A; only B; only C; any one or some combinations of A, B, and C; or all of A, B, and C.

[0140] As will be fully understood by those skilled in the art, the features of the various embodiments of this disclosure may be linked or combined with each other in part or in whole, and may interoperate with each other in various ways and be technically driven. The embodiments of this disclosure may be implemented independently of each other or may be implemented together in an interdependent relationship.

[0141] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, for ease of description, the scale, size, and thickness of each element shown in the drawings differ from the actual scale; therefore, embodiments of the present disclosure are not limited to the scales shown in the drawings.

[0142] Figure 1 This is a perspective view of a vibration device according to one embodiment of the present disclosure. Figure 2 It is along Figure 1 The cross-sectional view taken from line I-I'.

[0143] Reference Figure 1 and Figure 2 According to one embodiment of the present disclosure, the vibration device 10 may include a vibration device 110, a first cover member 120 disposed on a first surface of the vibration device 110, and a second cover member 130 disposed on a second surface of the vibration device 110 opposite to (or different from) the first surface.

[0144] The vibration device 110 may be a vibration structure, a vibration generator, a vibration module, an actuator, an exciter, a vibrating diaphragm, a diaphragm actuator, a diaphragm exciter, or a sound generator, but the embodiments disclosed herein are not limited thereto.

[0145] The vibration device 110 may include a piezoelectric material with piezoelectric properties. The vibration device 110 can be displaced or vibrated (or driven) as the piezoelectric material alternately contracts and expands in response to a first vibration drive signal (or a first sound signal) through the piezoelectric effect of the material. For example, the vibration device 110 may output or generate a first sound wave based on the displacement or vibration (or drive) of the piezoelectric material. For example, the vibration of the vibration device 110 may be used as tactile feedback for responding to touch (e.g., user touch).

[0146] According to one embodiment of the present disclosure, the vibration device 110 may include a vibration portion 110a containing a piezoelectric material, a first electrode portion 110b disposed on a first surface of the vibration portion 110a, and a second electrode portion 110c disposed on a second surface of the vibration portion 110a that is opposite to or different from the first surface.

[0147] The vibrating part (or first vibrating part) 110a may be referred to as a vibrating layer, piezoelectric layer, piezoelectric material layer, electroactive layer, piezoelectric vibrating part, piezoelectric material part, electroactive part, inorganic material layer or inorganic material part, etc., but the embodiments disclosed herein are not limited to these.

[0148] The vibrating part 110a can be configured as a ceramic matrix material for generating relatively high vibrations, or it can be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure can exhibit both piezoelectric and inverse piezoelectric effects, and can be an oriented plate-like structure. The perovskite crystal structure can be represented by the chemical formula "ABO3". In the chemical formula, "A" can include a divalent metal element, and "B" can include a tetravalent metal element. As one embodiment of this disclosure, in the chemical formula "ABO3", "A" and "B" can be cations, and "O" can be anion. For example, the perovskite crystal structure can include at least one or more of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTiO3, but the embodiments of this disclosure are not limited thereto.

[0149] According to one embodiment of the present disclosure, the vibrating part 110a may include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni) and niobium (Nb), but the embodiments of the present disclosure are not limited thereto.

[0150] According to another embodiment of this disclosure, the vibrating part 110a may include a lead zirconate titanate (PZT) based material containing lead (Pb), zirconium (Zr), and titanium (Ti), or it may include a 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 vibrating part 110a may include at least one or more of CaTiO3, BaTiO3, and SrTiO3 that do not contain Pb, but the embodiments of this disclosure are not limited thereto.

[0151] According to another embodiment of this disclosure, the vibrating part 110a may have a piezoelectric deformation coefficient "d" of 1000 pC / N or greater along the thickness direction Z. 33 "Because the vibrating part 110a has a high voltage deformation coefficient "d" 33 Therefore, the vibration part 110a can be applied to vibrating objects (or vibrating components) with large dimensions, or to vibrating devices that achieve sufficient vibration or piezoelectric characteristics. For example, the vibration part 110a may include a PZT-based material (PbZrTiO3) as the main component, and may include a softening agent dopant material doped to the "A" site (Pb) and a relaxor ferroelectric material doped to the "B" site (ZrTi).

[0152] The softener doping material can enhance the piezoelectric and dielectric properties of the vibrating part 110a, and can, for example, increase the piezoelectric deformation coefficient "d" of the vibrating part 110a. 33 When the softener dopant material includes a monovalent element "+1", the piezoelectric and dielectric properties may decrease. For example, when the softener dopant material is configured as potassium (K) and rubidium (Rb), the piezoelectric and dielectric properties may decrease. Therefore, through various experiments, the inventors of this disclosure have recognized that the softener dopant material should be configured with divalent elements "+2" to trivalent elements "+3" to enhance the piezoelectric and dielectric properties. The softener dopant material according to one embodiment of this disclosure may include divalent elements... +2 to trivalent elements +3. Quasi-isomorphic phase boundaries (MPBs) can be configured by adding softening agent dopants to PZT-based materials (PbZrTiO3), thereby enhancing piezoelectric and dielectric properties. For example, softening agent dopants can include strontium (Sr), barium (Ba), lanthanum (La), neodymium (Nd), calcium (Ca), yttrium (Y), erbium (Er), or ytterbium (Yb). For example, the softening agent dopant ions (Sr...) incorporated into PZT-based materials (PbZrTiO3)... 2+ Ba 2 + La 2+ 、Nd 3+ Ca 2+ Y 3+Er 3+ Yb 3+ This substance can replace a portion of the lead (Pb) in PZT-based materials (PbZrTiO3), and its substitution rate can be from about 2 mol% to about 20 mol%. For example, when the substitution rate is less than 2 mol% or greater than 20 mol%, the perovskite crystal structure may be destroyed, and therefore, the electromechanical coupling coefficient "kP" and the piezoelectric deformation coefficient "d" will be affected. 33 "It may decrease. When the softener doped material is replaced, MPB can be configured, and the piezoelectric and dielectric properties of the MPB can be high, thereby realizing a vibration device with high piezoelectric and high dielectric properties."

[0153] According to one embodiment of this disclosure, the relaxor ferroelectric material doped into a PZT-based material (PbZrTiO3) can enhance the electrical deformation characteristics of the vibrating part 110a. The relaxor ferroelectric material according to one embodiment of this disclosure may include lead magnesium niobate (PMN)-based materials or lead nickel niobate (PNN)-based materials, but the embodiments of this disclosure are not limited thereto. PMN-based materials may include Pb, Mg, and Nb, and may include, for example, Pb(Mg,Nb)O3. PNN-based materials may include Pb, Ni, and Nb, and may include, for example, Pb(Ni,Nb)O3. For example, the relaxor ferroelectric material doped into the PZT-based material (PbZrTiO3) can replace a portion of each of zirconium (Zr) and titanium (Ti) in the PZT-based material (PbZrTiO3), and its substitution rate may be from about 5 mol% to about 25 mol%. For example, when the substitution rate is less than 5 mol% or greater than 25 mol%, the perovskite crystal structure may be disrupted, thus affecting the electromechanical coupling coefficient "kP" and the piezoelectric deformation coefficient "d". 33 "It may decrease."

[0154] According to one embodiment of this disclosure, the vibrating part 110a may further include donor material doped into the "B" site (ZrTi) of the PZT-based material (PbZrTiO3) to further enhance the piezoelectric coefficient. For example, the donor material doped into the "B" site (ZrTi) may include a tetravalent element "+4" or a hexavalent element "+6". For example, the donor material doped into the "B" site (ZrTi) may include tellurium (Te), germanium (Ge), uranium (U), bismuth (Bi), niobium (Nb), tantalum (Ta), antimony (Sb), or tungsten (W).

[0155] The first electrode portion 110b may be disposed on the first surface (or upper surface) of the vibrating portion 110a. For example, the first electrode portion 110b may be electrically connected to the first surface of the vibrating portion 110a. For example, the first electrode portion 110b may be directly electrically connected to the first surface of the vibrating portion 110a. The first electrode portion 110b may be disposed between the vibrating portion 110a and the first cover member 120. According to another embodiment of the present disclosure, the first electrode portion 110b may include at least one pair or more finger-shaped electrodes parallel to each other on the first surface of the vibrating portion 110a. The finger-shaped first electrode portion 110b may be connected to a pad portion located at an outer periphery of the first surface of the vibrating portion 110a.

[0156] According to one embodiment of this disclosure, the first electrode portion 110b 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 this disclosure are not limited thereto. The opaque conductive material may include aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), Mg, or alloys thereof, but embodiments of this disclosure are not limited thereto.

[0157] The second electrode portion 110c may be disposed on the second surface (or rear surface) of the vibrating portion 110a and may overlap with the first electrode portion 110b. For example, the second electrode portion 110c may be electrically connected to the second surface of the vibrating portion 110a. For example, the second electrode portion 110c may be directly electrically connected to the second surface of the vibrating portion 110a. For example, the second electrode portion 110c may be disposed between the vibrating portion 110a and the second cover member 130. For example, the second electrode portion 110c may have an integral electrode type (or a single electrode type) disposed on the entire second surface of the vibrating portion 110a. For example, the second electrode portion 110c may have the same shape as the vibrating portion 110a, but the embodiments disclosed herein are not limited thereto.

[0158] According to one embodiment of the present disclosure, the second electrode portion 110c may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the second electrode portion 110c may be formed of the same material as the first electrode portion 110b, but the embodiments of the present disclosure are not limited thereto. As another embodiment of the present disclosure, the second electrode portion 110c may be formed of a different material than the first electrode portion 110b.

[0159] According to one embodiment of the present disclosure, the vibration device 10 may further include an adhesive layer 115 disposed between the first cover member 120 and the second cover member 130 and surrounding the vibration device 110.

[0160] The adhesive layer 115 can bond the first cover member 120 to the second cover member 130 and place the vibrating part 110a therebetween. The adhesive layer 115 can be disposed in areas other than the vibrating device 110 in the region between the first cover member 120 and the second cover member 130.

[0161] According to one embodiment of the present disclosure, the adhesive layer 115 may include a first adhesive layer 115a disposed on a second surface (or rear surface) of the first cover member 120 and a second adhesive layer 115b disposed on a first surface (or upper surface) of the second cover member 130. The first adhesive layer 115a and the second adhesive layer 115b may be joined or attached to each other between the first cover member 120 and the second cover member 130, and thus can be implemented as a single adhesive layer. Either the first adhesive layer 115a or the second adhesive layer 115b may be omitted.

[0162] Each of the first adhesive layer 115a and the second adhesive layer 115b may include an electrically insulating material. For example, the electrically insulating material may be viscous and may include a material capable of compression and decompression. For example, one or more of the first adhesive layer 115a and the second adhesive layer 115b may include epoxy resin, acrylic resin, silicone resin, or polyurethane resin, but embodiments of this disclosure are not limited thereto.

[0163] The first cover member 120 can be connected or attached to the first surface (or the first electrode portion 110b) of the vibration device 110 via a lamination process using the first adhesive layer 115a. The second cover member 130 can be connected or attached to the second surface (or the second electrode portion 110c) of the vibration device 110 via a lamination process using the second adhesive layer 115b.

[0164] The vibration device 10 according to one embodiment of the present disclosure may further include a flexible cable FC. The flexible cable FC may be electrically connected to the vibration device 110 and may be electrically connected to the pad portion of the vibration device 110. Therefore, the flexible cable FC may provide a vibration drive signal to the corresponding pad portion. The flexible cable FC according to one embodiment of the present disclosure may be a flexible printed circuit cable or a flexible flat cable, but the embodiments of the present disclosure are not limited thereto.

[0165] Figure 3A This is a perspective view of a vibration device according to one embodiment of the present disclosure. Figure 3B Show Figure 3A Region A. Figure 4 This is a plan view of a vibration device according to one embodiment of the present disclosure.

[0166] Reference Figure 3A , Figure 3B and Figure 4According to one embodiment of the present disclosure, the vibration device 110 of the vibration apparatus may include a vibration part 110a, a first electrode part 110b disposed on the upper surface or a first surface of the vibration part 110a, a line part 110d connected to the first electrode part 110b, a pad part 110p disposed on one side of the vibration part 110a and on the first surface, and a second electrode part 110c disposed on a second surface of the vibration part 110a that is opposite to (or different from) the first surface.

[0167] According to one embodiment of the present disclosure, the vibration device can generate a first sound wave SW1 at the first electrode portion 110b, and the first sound wave SW1 can have an audible frequency or an ultrasonic frequency band. For example, the first sound wave SW1 can have a frequency band of 200 Hz to 100 kHz or a frequency band of 20 kHz to 10 MHz. However, the frequency band of the first sound wave SW1 is not limited to these.

[0168] According to one embodiment of the present disclosure, a first electrode portion 110b of a vibration device may be disposed on the upper part or the first surface of a vibration portion 110a. According to one embodiment of the present disclosure, multiple first electrode portions 110b may be disposed on the upper part or the first surface of a vibration portion 110a. Each of the multiple first electrode portions 110b may be a circular patterned electrode and may be arranged in an array type. Furthermore, in a vibration device according to one embodiment of the present disclosure, each of the multiple first electrode portions 110b disposed on the upper part or the first surface of a vibration portion 110a may be a circular patterned electrode and may be arranged in an array type, and the vibration device 110 may include a vibration portion 110a, multiple first electrode portions 110b disposed on the upper part or the first surface of the vibration portion 110a, and a wiring portion 110d connecting the multiple first electrode portions 110b. Therefore, the vibration device 110 can be physically configured as a vibration device, but each of the plurality of first electrode portions 110b, which are circular patterned electrodes and arranged in an array type, can be implemented as a plurality of vibration devices or vibration generators, which have a resonant point by limiting (or defining) the active area or vibration area of ​​the vibration portion 110a to the circular patterned area of ​​each of the plurality of first electrode portions 110b.

[0169] The line section 110d can be connected between multiple first electrode sections 110b. For example, the line section 110d can be configured to connect between two adjacent first electrode sections 110b along the second direction Y. Therefore, multiple first electrode sections 110b arranged along the second direction Y can be connected to each other through the line section 110d.

[0170] The pad portion 110p can be disposed on one side of the vibration portion 110a and on the first surface, and can be commonly connected to a plurality of first electrode portions 110b via the line portion 110d. The line portion 110d can be connected between the plurality of first electrode portions 110b, and can be connected between some of the plurality of first electrode portions 110b and the pad portion 110p.

[0171] like Figure 3B As shown, each of the plurality of first electrode portions 110b can be configured with a circular pattern, wherein the radius R or the distance from the center or middle portion of the corresponding first electrode portion 110b to the edge of the corresponding first electrode portion 110b is constant, and therefore, the resonant frequency of the vibration device (or vibration apparatus) can be controlled to be constant. However, the embodiments are not limited to this. For example, the length or radius R of each of the plurality of first electrode portions 110b can be different. For example, the length or radius R of at least some of the plurality of first electrode portions 110b can be constant.

[0172] Furthermore, according to one embodiment of this disclosure, the resonant frequency "f" of the vibration device (or vibration apparatus) can be inversely proportional to the radius R of the first electrode portion 110b.

[0173] According to one embodiment of this disclosure, the resonant frequency “f” can be determined as shown in Equation 1 or Equation 2 below.

[0174] [Relation 1]

[0175]

[0176] [Relationship 2]

[0177]

[0178] In Equations 1 and 2, L can represent the length of the vibrating device, m can represent the unit mass of the vibrating device, F can represent the tension of the vibrating device, and k can represent the stiffness of the vibrating device.

[0179] According to one embodiment of this disclosure, a vibration device 110 comprising a plurality of first electrode portions 110b arranged in an array type and having circular electrode patterns can be implemented such that the length of one of the first electrode portions 110b that generates a resonant frequency is identified as the length of the vibration device in Equation 1. Therefore, similar to Equation 1 where the resonant frequency is inversely proportional to the length of the vibration device, the resonant frequency of the vibration device according to one embodiment of this disclosure can be inversely proportional to the radius of the first electrode portion 110b. Furthermore, as shown in Equation 1, the resonant frequency of the vibration device can be inversely proportional to a first length L1 along a first direction X or a second length L2 along a second direction Y of the vibration device 110. Based on the arrangement of the plurality of first electrode portions 110b including circular patterns, the vibration device according to one embodiment of this disclosure can achieve effects similar to or the same as an arrangement of multiple piezoelectric ceramics or piezoelectric devices.

[0180] Furthermore, the vibration device according to one embodiment of the present disclosure can output sound waves in the forward direction of the device through a plurality of first electrode portions 110b. It can be applied as a large-area ultrasonic generator or a large-area ultrasonic tactile display based on the beamforming effect of constructive interference caused by the array structure of the plurality of first electrode portions 110b arranged in rows and columns, and can be applied as a large-area display device, ultrasonic generator, sensor, etc.

[0181] Figure 5 A vibration drive circuit of a vibration device according to one embodiment of the present disclosure is shown.

[0182] Reference Figure 5 The vibration device according to one embodiment of the present disclosure may further include a vibration drive circuit 170.

[0183] The vibration drive circuit 170 can be electrically connected to the vibration unit 110a via a flexible cable FC. According to one embodiment of the present disclosure, the vibration drive circuit 170 can generate a first vibration drive signal for generating a first sound wave SW1 based on the vibration of the vibration device, and can provide the generated first vibration drive signal to the vibration device.

[0184] According to one embodiment of the present disclosure, the vibration drive circuit 170 may include a first amplifier 171 connected to the vibration device.

[0185] The first amplifier (or first signal generation circuit) 171 can generate a first vibration drive signal of type AC with a first polarity signal and a second polarity signal based on a sound source. According to one embodiment of the present disclosure, the first amplifier 171 may include a first output terminal T11 that outputs the first polarity signal of the first vibration drive signal and a second output terminal T12 that outputs the second polarity signal of the first vibration drive signal.

[0186] The vibration section 110a disposed in the vibration device may have a polarization direction P from the second electrode section 110c to the first electrode section 110b.

[0187] The first polarity signal of the first vibration drive signal output from the first output terminal T11 of the first amplifier 171 can be provided to the pad portion 110p disposed in the vibration device via the flexible cable FC, and thus to a plurality of first electrode portions 110b electrically connected to the pad portion 110p. The second polarity signal of the first vibration drive signal output from the second output terminal T22 of the first amplifier 171 can be provided to the second electrode portion 110c disposed in the vibration device via the flexible cable FC.

[0188] Configured in Figure 5 The vibration section 110a in the vibration device shown may have a polarization direction P from the second electrode section 110c to the first electrode section 110b. A first polarity signal of the first vibration drive signal may be provided to the first electrode section 110b of the vibration device, and a second polarity signal of the first vibration drive signal may be provided to the second electrode section 110c of the vibration device.

[0189] Figure 6 This is a perspective view of a vibration device according to another embodiment of the present disclosure. Figure 7 This is a plan view of a vibration device according to another embodiment of the present disclosure.

[0190] Reference Figure 6 and Figure 7 According to another embodiment of the present disclosure, the vibration device of the vibration apparatus may include a vibration section 110a, a plurality of first electrode sections 110b disposed on the upper surface or a first surface of the vibration section 110a, a wiring section 110d connecting the plurality of first electrode sections 110b, pad sections 110p1 to 110p4 disposed on the upper surface or the first surface of the vibration section 110a, and a second electrode section 110c disposed on a second surface of the vibration section 110a opposite to (or different from) the first surface. Furthermore, the first electrode sections 110b and pad sections 110p1 to 110p4 of the vibration apparatus according to another embodiment of the present disclosure may be disposed in each of the first, second, third, and fourth regions disposed on the first or upper surface of the vibration section 110a. For example, the first electrode sections 110b disposed in each of the first to fourth regions may be electrically disconnected from each other.

[0191] exist Figure 6 In the above, the first region can be the region including the top corner, the second region can be the region including the right corner, the third region can be the region including the left corner, and the fourth region can be the region including the bottom corner.

[0192] According to another embodiment of this disclosure, the first electrode portion 110b may include at least one pair or more finger-shaped electrodes parallel to each other on the first surface of the vibrating portion 110a, and the finger-shaped first electrode portion 110b may be configured as a plurality and may be arranged, for example, to correspond to each of the first region, second region, third region, and fourth region arranged on the first surface or upper surface of the vibrating portion 110a. The first electrode portion 110b may be configured to independently drive only the region selected by the electrical signals applied to the first pad portion 110p1, second pad portion 110p2, third pad portion 110p3, and fourth pad portion 110p4. For example, the electrical signals applied to the first pad portion 110p1, second pad portion 110p2, third pad portion 110p3, and fourth pad portion 110p4 may be applied synchronously with the electrical signals applied to the second electrode portion 110c, and these electrical signals may be controlled by the flexible cable FC and the first amplifier 171.

[0193] According to one embodiment of this disclosure, the first to fourth regions can operate simultaneously; the first to third regions can be turned on (or activated), and the fourth region can be turned off (or deactivated). When the first and second regions are turned on, the third and fourth regions can be turned off, and when the first region is turned on, the second to fourth regions can be turned off. The embodiment is not limited to this. For example, the vibrating part 110a may include at least two regions located at any position on the upper surface of the vibrating part 110a. Furthermore, the first electrode portions 110b disposed in each of the at least two regions can be electrically disconnected from each other and can be driven independently.

[0194] According to another embodiment of the present disclosure, the first electrode portion 110b of the vibration device may be disposed on the upper part or the first surface of the vibration portion 110a. According to one embodiment of the present disclosure, multiple first electrode portions 110b may be disposed on the upper part or the first surface of the vibration portion 110a. Each of the multiple first electrode portions 110b may be a circular patterned electrode and may be arranged in an array type. Furthermore, in the vibration device according to one embodiment of the present disclosure, each of the multiple first electrode portions 110b disposed on the upper part or the first surface of the vibration portion 110a may be a circular patterned electrode and may be arranged in an array type, and the vibration device 110 may include a vibration portion 110a, multiple first electrode portions 110b disposed on the upper part or the first surface of the vibration portion 110a, and a wiring portion 110d connecting the multiple first electrode portions 110b. Therefore, the vibration device 110 can be physically configured as a vibration device, but each of the plurality of first electrode portions 110b, which are circular patterned electrodes and arranged in an array type, can be implemented as a plurality of vibration devices or vibration generators, which have a resonant point by limiting (or defining) the active area or vibration area of ​​the vibration portion 110a to the circular patterned area of ​​each of the plurality of first electrode portions 110b.

[0195] Based on the arrangement of a plurality of first electrode portions 110b including a circular pattern, a vibration device according to one embodiment of the present disclosure can achieve similar or the same effect as an arrangement of a plurality of piezoelectric ceramics or piezoelectric devices.

[0196] Furthermore, the vibration device according to one embodiment of the present disclosure can output sound waves in the forward direction of the device through a plurality of first electrode portions 110b. It can be applied as a large-area ultrasonic generator or a large-area ultrasonic tactile display based on the beamforming effect of constructive interference caused by the array structure of the plurality of first electrode portions 110b arranged in rows and columns, and can be applied as a large-area display device, ultrasonic generator, sensor, etc.

[0197] According to one embodiment of this disclosure, a vibration device 110 including a plurality of first electrode portions 110b arranged in an array type with circular electrode patterns can be implemented such that the length of one of the first electrode portions 110b that generates a resonant frequency is identified as the length of the vibration device in Equation 1. Similar to Equation 1, where the resonant frequency is inversely proportional to the length of the vibration device, the resonant frequency of the vibration device according to one embodiment of this disclosure can be inversely proportional to the radius of the first electrode portion 110b. Furthermore, as shown in Equation 1, the resonant frequency of the vibration device can be inversely proportional to a first length L1 of the vibration device 110 along a first direction X or a second length L2 along a second direction Y.

[0198] For example, the first sound wave SW1 can be a sound wave in the ultrasonic frequency band or a tactile feedback signal.

[0199] The wiring section 110d can be connected between multiple first electrode sections 110b in each of the first to fourth regions. For example, the wiring section 110d can be configured to connect between two adjacent first electrode sections 110b along the second direction Y in each of the first to fourth regions. Therefore, multiple first electrode sections 110b arranged along the second direction Y in each of the first to fourth regions can be connected to each other through the wiring section 110d.

[0200] The first pad portion 110p1 can be disposed in the first region of the vibration portion 110a, and can be commonly connected to a plurality of first electrode portions 110b in the first region of the vibration portion 110a via a line portion 110d. In the first region of the vibration portion 110a, the line portion 110d can be connected between the plurality of first electrode portions 110b, and can be connected between some of the plurality of first electrode portions 110b and the first pad portion 110p1.

[0201] The second pad portion 110p2 can be disposed in the second region of the vibration portion 110a, and can be commonly connected to a plurality of first electrode portions 110b in the second region of the vibration portion 110a via a line portion 110d. In the second region of the vibration portion 110a, the line portion 110d can be connected between the plurality of first electrode portions 110b, and can be connected between some of the plurality of first electrode portions 110b and the second pad portion 110p2.

[0202] The third pad portion 110p3 can be disposed in the third region of the vibration portion 110a, and can be commonly connected to a plurality of first electrode portions 110b in the third region of the vibration portion 110a via a line portion 110d. In the third region of the vibration portion 110a, the line portion 110d can be connected between the plurality of first electrode portions 110b, and can be connected between some of the plurality of first electrode portions 110b and the third pad portion 110p3.

[0203] The fourth pad portion 110p4 can be disposed in the fourth region of the vibration portion 110a, and can be commonly connected to a plurality of first electrode portions 110b in the fourth region of the vibration portion 110a via a line portion 110d. In the fourth region of the vibration portion 110a, the line portion 110d can be connected between the plurality of first electrode portions 110b, and can be connected between some of the plurality of first electrode portions 110b and the fourth pad portion 110p4.

[0204] The vibrating part 110a and the second electrode part 110c can be respectively connected to the above reference. Figure 3AThe vibration part 110a and the second electrode part 110c described are the same, so the same reference numerals indicate the same elements and their repeated descriptions can be omitted.

[0205] Figure 8 A vibration drive circuit for a vibration device according to another embodiment of the present disclosure is shown.

[0206] Reference Figure 8 According to another embodiment of the present disclosure, the vibration device may further include a vibration drive circuit 170.

[0207] The vibration drive circuit 170 can be electrically connected to the vibration unit 110a via a flexible cable FC. According to one embodiment of this disclosure, the vibration drive circuit 170 can generate a first vibration drive signal for generating a first sound wave SW1 based on the vibration of the vibration device, and can provide the generated first vibration drive signal to the vibration device. For example, the first sound wave SW1 can be a sound wave in the ultrasonic band or a tactile feedback signal.

[0208] According to one embodiment of the present disclosure, the vibration drive circuit 170 may include a first amplifier 171 connected to the vibration device.

[0209] The first amplifier (or first signal generation circuit) 171 can generate a first vibration drive signal of type AC, having a first polarity signal and a second polarity signal, based on a sound source. According to one embodiment of this disclosure, the first amplifier 171 may include a first output terminal that outputs the first polarity signal of the first vibration drive signal and a second output terminal T22 that outputs the second polarity signal of the first vibration drive signal. For example, the first output terminal may include a first-1 output terminal T11, a first-2 output terminal T12, a first-3 output terminal T13, and a first-4 output terminal T14.

[0210] The vibration section 110a disposed in the vibration device may have a polarization direction P from the second electrode section 110c to the first electrode section 110b.

[0211] The first polarity signal of the first vibration drive signal output from the first amplifier 171's first-1 output terminal T11 can be provided to the first pad portion 110p1 configured in the vibration device via a flexible cable FC, and then to a plurality of first electrode portions 110b electrically connected to the first pad portion 110p1. The first polarity signal of the first vibration drive signal output from the first amplifier 171's first-2 output terminal T12 can be provided to the second pad portion 110p2 configured in the vibration device via a flexible cable FC, and then to a plurality of first electrode portions 110b electrically connected to the second pad portion 110p2. The first polarity signal of the first vibration drive signal output from the first-3 output terminal T13 can be provided to the third pad portion 110p3 configured in the vibration device via a flexible cable FC, and then to a plurality of first electrode portions 110b electrically connected to the third pad portion 110p3. The first polarity signal of the first vibration drive signal output from the first amplifier 171's first-to-fourth output terminals T14 can be provided to the fourth pad portion 110p4 configured in the vibration device via a flexible cable FC, and then to a plurality of first electrode portions 110b electrically connected to the fourth pad portion 110p4. The second polarity signal of the first vibration drive signal output from the second output terminal T22 of the first amplifier 171 can be provided to the second electrode portion 110c configured in the vibration device via a flexible cable FC. Figure 8 In the diagram, for ease of description, the first-third output terminals T13 are shown in the area adjacent to the first pad portion 110p1, but in the plan view, they can be configured to be connected to the third pad portion 110p3.

[0212] Configured in Figure 8 The vibration section 110a in the vibration device shown may have a polarization direction P from the second electrode section 110c to the first electrode section 110b. A first polarity signal of the first vibration drive signal may be provided to a plurality of first electrode sections 110b of the vibration device, and a second polarity signal of the first vibration drive signal may be provided to the second electrode section 110c of the vibration device.

[0213] Figure 9A This is a perspective view of a vibration device according to another embodiment of the present disclosure. Figure 9B Show Figure 9A Region B. Figure 10 yes Figure 9A A three-dimensional view of the vibrating part. Figure 11 This is a plan view of a vibration device according to another embodiment of the present disclosure.

[0214] Reference Figures 9A to 11Both the first electrode portion 110b and the second electrode portion 110c can be disposed on the first surface or the upper part of the vibration portion 110a, and therefore, the vibration device according to another embodiment of the present disclosure can be referred to as an in-plane vibration device.

[0215] According to another embodiment of this disclosure, the first electrode portion 110b may include at least one pair or more finger-shaped electrodes parallel to each other on the first surface of the vibrating portion 110a, and the second electrode portion 110c may include at least one pair or more finger-shaped electrodes parallel to each other on the first surface of the vibrating portion 110a. The finger-shaped first electrode portion 110b may be connected to a first pad portion 110p1 disposed at one edge of the first surface of the vibrating portion 110a, and the finger-shaped second electrode portion 110c may be connected to a second pad portion 110p2 disposed at another edge of the first surface of the vibrating portion 110a. The plurality of finger-shaped first electrode portions 110b may be configured to engage with the plurality of finger-shaped second electrode portions 110c. For example, the plurality of finger-shaped first electrode portions 110b and the plurality of finger-shaped second electrode portions 110c may be parallel to each other and spaced apart by a predetermined distance, and may engage with each other without contact.

[0216] Reference Figure 9B When a positive (+) signal is applied to the first electrode portion 110b and a negative (-) signal is applied to the second electrode portion 110c, an electric field is generated between the first electrode portion 110b and the second electrode portion 110c. For example... Figure 9B As shown, when an electric field E is generated, the vibrating part 110a, including the piezoelectric material, can deform through the piezoelectric effect, and the deformation rate (ΔL) can be calculated by multiplying the piezoelectric deformation coefficient by the electric field.

[0217] Reference Figure 10 In another embodiment of the vibration device according to this disclosure, the vibration section 110a having a polarization direction P parallel to the first direction X and the vibration section 110a having different polarization directions P can be arranged alternately and repeatedly along the first direction X. The first width W1 of the vibration section 110a having a polarization direction P parallel to the first direction X and the second width W2 of the vibration section 110a having different polarization directions P can be the same or can have different dimensions. Furthermore, as described below... Figure 11 As described above, the first width W1 and the second width W2 can be set such that the vibrating part 110a having a polarization direction P parallel to the first direction X and the vibrating part 110a having different polarization directions P are alternately arranged along the first direction X at a plurality of circular patterns defined by the first engraved pattern 110ba and the second engraved pattern 110ca.

[0218] Reference Figure 9B and Figure 10 , Figure 9B The direction of the electric field can be parallel to the first direction X, and Figure 10 The polarization direction P can be parallel to the first direction X, therefore, the piezoelectric deformation coefficient (or piezoelectric constant) in the first direction relative to X can be defined as d. 33 Therefore, the deformation rate (ΔL) of the vibrating part of the vibration device according to another embodiment of this disclosure can be calculated as E×d. 33 .

[0219] Combination Figure 9A Reference Figure 11 Based on the first electrode portion 110b and the second electrode portion 110c that are joined and intersected by each other, the vibration portion 110a having a polarization direction P parallel to the first direction X, and the vibration portion 110a having a different polarization direction P, the vibration device according to another embodiment of the present disclosure can be implemented as an array of electrodes arranged in a circular pattern. Furthermore, referring to... Figure 11 The first electrode portion 110b may include a first engraved pattern 110ba, and the second electrode portion 110c may include a second engraved pattern 110ca. The first electrode portion 110b and the second electrode portion 110c may be configured with multiple circular patterns. These multiple circular patterns can be arranged in an array type and can be implemented as multiple vibration devices or vibration generators that have a resonant point by limiting (or defining) the active area or vibration area of ​​the vibration portion 110a to a circular pattern area.

[0220] Furthermore, multiple circular patterns configured with the first engraved pattern 110ba and the second engraved pattern 110ca can have the characteristics described above. Figure 3B The specific radius described herein, and can be arranged in an array type on the first surface or upper part of the vibrating part 110a. The vibration device 110 may include a vibrating part 110a and a first electrode part 110b and a second electrode part 110c disposed on the first surface or upper part of the vibrating part 110a, and thus, the vibration device 110 can be physically configured as a vibration device. However, the first engraved pattern 110ba and the second engraved pattern 110ca disposed on the first surface or upper part of the vibrating part 110a in an array type having multiple circular patterns can be implemented as being identified as multiple vibration devices or vibration generators, which have a resonant point by limiting (or defining) the active area or vibration area of ​​the vibrating part 110a into a circular pattern area based on the first electrode part 110b and the second electrode part 110c.

[0221] According to one embodiment of this disclosure, a vibration device 110 including a first electrode portion 110b of an array type having a plurality of circular patterns arranged by a first engraved pattern 110ba and a second engraved pattern 110ca can be implemented such that the length of the circular pattern defined by the first engraved pattern 110ba and the second engraved pattern 110ca is identified as the length of the vibration device in relation 1. Therefore, similar to the inverse proportionality between the resonant frequency and the length of the vibration device in relation 1, the resonant frequency of the vibration device according to one embodiment of this disclosure can be inversely proportional to the radius of the circular pattern of the first engraved pattern 110ba and the second engraved pattern 110ca. Furthermore, as shown in relation 1, the resonant frequency of the vibration device can be inversely proportional to a first length L1 of the vibration device 110 along a first direction X or a second length L2 along a second direction y.

[0222] According to one embodiment of this disclosure, in an in-plane vibration device, the displacement direction can be related to the piezoelectric deformation coefficient d. 33 The direction matching allows for increased displacement of the vibrating device and enables ultrasonic resonance design in the 20kHz to 10MHz frequency band.

[0223] Figure 12 This is a perspective view of a vibration device according to another embodiment of the present disclosure. Figure 13 This is a plan view of a vibration device according to another embodiment of the present disclosure. Figure 14A yes Figure 13 A three-dimensional view of the vibrating part. Figure 14B It is along Figure 13 The cross-sectional view taken from line II-II'.

[0224] Reference Figure 12 , Figure 13 , Figure 14A and Figure 14BAccording to one embodiment of the present disclosure, the vibration device of the vibration apparatus may include a vibration section 110a, an ultrasonic electrode section 110b1 and a sound electrode section 110b2 disposed on a first surface or upper surface of the vibration section 110a, an ultrasonic pad section 110p1 of the ultrasonic electrode section 110b1, a sound pad section 110p2 of the sound electrode section 110b2, and a wiring section 110d connecting the ultrasonic electrode section 110b1 and the ultrasonic pad section 110p1 and connecting the sound electrode section 110b2 and the sound pad section 110p2. It may also include a second electrode section 110c disposed on a second surface of the vibration section 110a that is opposite to or different from the first surface. The ultrasonic electrode section 110b1 may be a first electrode section, but the embodiments of the present disclosure are not limited thereto. The sound electrode section 110b2 may be a second electrode section, but the embodiments of the present disclosure are not limited thereto. The ultrasonic pad section 110p1 may be a pad section or a first pad section, but the embodiments of the present disclosure are not limited thereto.

[0225] According to another embodiment of this disclosure, the ultrasonic electrode portion 110b1 may include at least one pair or more finger-shaped electrodes parallel to each other on the first surface of the vibrating portion 110a. The finger-shaped first electrode portion 110b may be connected to a first pad portion 110p1 disposed at an edge of the first surface of the vibrating portion 110a. The acoustic electrode portion 110b2 may be formed on the first surface of the vibrating portion 110a to surround the plurality of finger-shaped electrodes.

[0226] According to another embodiment of this disclosure, the vibration device can generate a first sound wave SW1 at the ultrasonic electrode portion 110b1 and a second sound wave SW2 at the acoustic electrode portion 110b2. For example, the first sound wave SW1 may include a frequency in the 200Hz to 100kHz band or a frequency in the 20kHz to 10MHz band, and the second sound wave SW2 may include an audible frequency in the 200Hz to 20kHz band. However, the frequency bands of the first sound wave SW1 and the second sound wave SW2 are not limited thereto.

[0227] According to another embodiment of the present disclosure, the first electrode portion 110b of the vibration device may be disposed on the upper part or the first surface of the vibration portion 110a. According to one embodiment of the present disclosure, multiple first electrode portions 110b may be disposed on the upper part or the first surface of the vibration portion 110a. Each of the multiple first electrode portions 110b may be a circular patterned electrode and may be arranged in an array type. Furthermore, in a vibration device according to one embodiment of the present disclosure, each of the multiple first electrode portions 110b disposed on the upper part or the first surface of the vibration portion 110a may be a circular patterned electrode and may be arranged in an array type, and the vibration device 110 may include a vibration portion 110a, multiple first electrode portions 110b disposed on the upper part or the first surface of the vibration portion 110a, and a wiring portion 110d connecting the multiple first electrode portions 110b. The vibration portion 110a includes a first vibration portion 110a1, a third vibration portion 110a3, and a second vibration portion 110a2 located between the first vibration portion 110a1 and the third vibration portion 110a3. Therefore, the vibration device 110 can be physically configured as a vibration device, but each of the plurality of first electrode portions 110b arranged as circular patterned electrodes in an array type can be implemented as a plurality of vibration devices or vibration generators, which have a resonant point by limiting (or defining) the active area or vibration area of ​​the vibration portion 110a to the circular patterned area of ​​each of the plurality of first electrode portions 110b.

[0228] According to one embodiment of this disclosure, a vibration device 110 comprising a plurality of first electrode portions 110b arranged in an array type and having a circular electrode pattern can be implemented such that the length of one of the first electrode portions 110b that generates a resonant frequency is identified as the length of the vibration device in Equation 1. Therefore, similar to Equation 1 where the resonant frequency is inversely proportional to the length of the vibration device, the resonant frequency of the vibration device according to one embodiment of this disclosure can be inversely proportional to the radius of the first electrode portion 110b. Furthermore, as shown in Equation 1, the resonant frequency of the vibration device can be inversely proportional to a first length L1 of the vibration device 110 along a first direction X or a second length L2 along a second direction Y. Based on the arrangement of the plurality of first electrode portions 110b including a circular pattern, the vibration device according to one embodiment of this disclosure can achieve effects similar to or the same as an arrangement of multiple piezoelectric ceramics or piezoelectric devices.

[0229] Furthermore, the vibration device according to one embodiment of the present disclosure can output sound waves in the forward direction of the device through a plurality of first electrode portions 110b. It can be applied as a large-area ultrasonic generator or a large-area ultrasonic tactile display based on the beamforming effect of constructive interference caused by the array structure of the plurality of first electrode portions 110b arranged in rows and columns, and can be applied as a large-area display device, ultrasonic generator, sensor, etc.

[0230] Reference Figure 14B According to one embodiment of the present disclosure, the vibration part 110a of the vibration device may include a first vibration part 110a1, a second vibration part 110a2 and a third vibration part 110a3.

[0231] According to one embodiment of this disclosure, the first vibration portion 110a1 and the third vibration portion 110a3 can be configured as inorganic material portions. The inorganic material portion may include piezoelectric materials, composite piezoelectric materials, or electroactive materials having a piezoelectric effect. For example, the first vibration portion 110a1 and the third vibration portion 110a3 may include materials similar to those described above. Figure 2 The vibrating part 110a described is made of a piezoelectric material that is essentially the same.

[0232] According to one embodiment of the present disclosure, the second vibration part 110a2 can be configured as an organic material part. For example, the organic material part can be disposed between the first vibration part 110a1 and the third vibration part 110a3, and thus the second vibration part 110a2 can absorb the impact applied to the first vibration part 110a1 and the third vibration part 110a3, can release the stress concentrated on the first vibration part 110a1 and the third vibration part 110a3, can enhance the durability of the first vibration part 110a1 and the third vibration part 110a3 or the vibration device 110, and can provide flexibility to the first vibration part 110a1 and the third vibration part 110a3 or the vibration device 110.

[0233] The organic material portion disposed in the second vibration portion 110a2 may be an organic material or organic polymer that has flexible properties compared to the first vibration portion 110a1 and the third vibration portion 110a3, but the embodiments of this disclosure are not limited thereto. For example, the second vibration portion 110a2 may be referred to as an adhesive portion, a stretching portion, a bending portion, a damping portion, or a flexible portion, etc., which have flexible names, but the embodiments of this disclosure are not limited thereto.

[0234] Multiple second vibration sections 110a2 can be configured. For example, multiple second vibration sections 110a2 can be configured to surround each of multiple first vibration sections 110a1. Each of the multiple second vibration sections 110a2 can be disposed between the first vibration section 110a1 and the third vibration section 110a3. Therefore, in the vibration section 110a or vibration device 110, the vibration energy of the link in a unit cell of the first vibration section 110a1 can be increased by the corresponding second vibration section 110a2. Therefore, vibration characteristics can be improved, and piezoelectric characteristics and flexibility can be ensured. For example, the second vibration section 110a2 may include one or more of epoxy-based polymers, acrylic polymers, and silicone polymers, but embodiments of this disclosure are not limited thereto.

[0235] like Figure 14A and Figure 14B As shown, in another embodiment of the vibration device 110 according to this disclosure, a first vibration section 110a1, configured as an inorganic material section, may be disposed inside it in a shape such as a cylinder; a second vibration section 110a2, configured as an organic material section, may be disposed in a shape surrounding the first vibration section 110a1; and a third vibration section 110a3, configured as an inorganic material section, may be disposed in other spaces (or remaining spaces). Subsequently, an ultrasonic electrode section 110b1 may be disposed at a first surface of the first vibration section 110a1 to correspond to the first vibration section 110a1, and a sound electrode section 110b2 may be disposed at a first surface of the third vibration section 110a3 to correspond to the third vibration section 110a3. Subsequently, a second electrode section 110c may be disposed at a second surface of the vibration section 110a that is opposite to or different from the first surface.

[0236] Figure 15 A vibration drive circuit for a vibration device according to another embodiment of the present disclosure is shown.

[0237] Reference Figure 15 The vibration device according to one embodiment of the present disclosure may further include a vibration drive circuit 170.

[0238] The vibration drive circuit 170 can be electrically connected to the vibration unit 110a via a flexible cable FC. According to one embodiment of the present disclosure, the vibration drive circuit 170 can generate a first vibration drive signal for generating a first sound wave SW1 based on the vibration of the vibration device, and can provide the generated first vibration drive signal to the vibration device.

[0239] According to one embodiment of the present disclosure, the vibration drive circuit 170 may include a first amplifier 171 connected to the vibration device.

[0240] The first amplifier (or first signal generation circuit) 171 can generate a first vibration drive signal of type AC with a first polarity signal and a second polarity signal based on a sound source. According to one embodiment of the present disclosure, the first amplifier 171 may include a first output terminal T11 that outputs the first polarity signal of the first vibration drive signal and a second output terminal T22 that outputs the second polarity signal of the first vibration drive signal.

[0241] The vibration section 110a disposed in the vibration device may have a polarization direction P from the second electrode section 110c to the first electrode section 110b.

[0242] The first polarity signal of the first vibration drive signal output from the first output terminal T11 of the first amplifier 171 can be provided to the pad portions 110p1 and 110p2 disposed in the vibration device via a flexible cable FC, and can then be provided to a plurality of first electrode portions 110b electrically connected to the pad portions 110p1 and 110p2. The second polarity signal of the first vibration drive signal output from the second output terminal T22 of the first amplifier 171 can be provided to the second electrode portion 110c disposed in the vibration device via a flexible cable FC.

[0243] Configured in Figure 15 The vibration section 110a in the vibration device shown may have a polarization direction P from the second electrode section 110c to the first electrode section 110b. A first polarity signal of the first vibration drive signal may be provided to the first electrode section 110b of the vibration device, and a second polarity signal of the first vibration drive signal may be provided to the second electrode section 110c of the vibration device.

[0244] Figure 16 An apparatus according to one embodiment of the present disclosure is shown. Figure 17 It is along Figure 16 The cross-sectional view taken from line III-III' is shown.

[0245] Reference Figure 16 and Figure 17 According to one embodiment of the present disclosure, an apparatus (or display device) may include a display panel (vibrating object or vibrating member) 1100 configured to display an image, and a vibration generating device 1200 that vibrates the display panel 1100 at the rear surface (or back surface) of the display panel 1100.

[0246] Display panel 1100 can display images (e.g., electronic images, digital images, still images, or video images). For example, display panel 1100 can display images by emitting light. Display panel 1100 can be a curved display panel, or it can be any type of display panel (e.g., liquid crystal display panel, organic light-emitting display panel, quantum dot light-emitting display panel, micro-light-emitting diode display panel, and electrophoretic display panel, etc.). Display panel 1100 can be a flexible display panel. For example, display panel 1100 can be a flexible light-emitting display panel, a flexible electrophoretic display panel, a flexible electrowetting display panel, a flexible micro-light-emitting diode display panel, or a flexible quantum dot light-emitting display panel, but the embodiments of this disclosure are not limited thereto.

[0247] According to one embodiment of this disclosure, the vibrating object may include one or more of the following: a display panel including a plurality of pixels configured to display an image, a screen panel on which an image is to be projected from a display device, a lighting panel, a sign panel, vehicle interior materials, vehicle windows, vehicle exterior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, wood, plastic, glass, metal, cloth, fiber, paper, rubber, leather, carbon, and mirrors.

[0248] A display panel 1100 according to one embodiment of the present disclosure may include an image display area AA (or effective area) for displaying an image according to the driving of a plurality of pixels. Furthermore, the display panel 1100 may also include a non-display area IA surrounding the display area AA, but embodiments of the present disclosure are not limited thereto.

[0249] According to one embodiment of the present disclosure, a display panel 1100 may include a pixel array portion disposed at a display area AA of a substrate. The pixel array portion may include a plurality of pixels that display an image based on signals provided via signal lines. The signal lines may include gating lines, data lines, and pixel drive power lines, etc., but embodiments of the present disclosure are not limited thereto.

[0250] Each of the plurality of pixels may include a pixel circuit layer comprising a driving thin film transistor (TFT) disposed in a pixel region consisting of a plurality of gate lines and / or a plurality of data lines, a first electrode (or pixel electrode) electrically connected to the driving TFT, a light-emitting device formed at an anode electrode, and a second electrode (or common electrode) electrically connected to the light-emitting device.

[0251] A light-emitting device according to one embodiment of the present disclosure may include an organic light-emitting device layer formed at a first electrode. The organic light-emitting device layer may be configured to emit light of the same color (e.g., white light) for each pixel, or may be configured to emit light of a different color (e.g., red, green, or blue light) for each pixel.

[0252] A light-emitting device according to another embodiment of this disclosure may include a miniature light-emitting diode device electrically connected to each of a first electrode and a second electrode. The miniature light-emitting diode device may be a light-emitting diode implemented as an integrated circuit (IC) or a chip-type light-emitting diode. The miniature light-emitting diode device may include a first terminal electrically connected to the first electrode and a second terminal electrically connected to the second electrode.

[0253] A display panel 1100 according to another embodiment of this disclosure may include a first substrate, a second substrate, and a liquid crystal layer. The first substrate may be an upper substrate or a thin-film transistor (TFT) array substrate. For example, the first substrate may include a pixel array portion comprising a plurality of pixels respectively disposed in a plurality of pixel regions defined by the intersections of a plurality of gate lines and / or a plurality of data lines. Each of the plurality of pixels may include a TFT connected to the gate lines and / or data lines, a pixel electrode connected to the TFT, and a common electrode disposed adjacent to the pixel electrode and provided with a common voltage. The second substrate may be a lower substrate or a color filter array substrate. For example, the second substrate may include a pixel defining pattern including an opening region overlapping the pixel region formed on the first substrate, and a color filter layer formed in the opening region. The liquid crystal layer may be disposed between the first substrate and the second substrate. The liquid crystal layer may include liquid crystal comprising liquid crystal molecules, wherein the orientation direction of the liquid crystal molecules changes based on an electric field generated by the data voltage and the common voltage applied to the pixel electrode of each pixel.

[0254] The vibration generating device 1200 can vibrate the display panel 1100 at its rear surface, thereby providing sound and / or tactile feedback to the user based on the vibration of the display panel 1100. The vibration generating device 1200 can be implemented to directly vibrate the display panel 1100 at its rear surface.

[0255] In one embodiment of this disclosure, the vibration generating device 1200 can vibrate according to a vibration drive signal synchronized with the image displayed on the display panel 1100, thereby vibrating the display panel 1100. In another embodiment of this disclosure, the vibration generating device 1200 can vibrate according to a tactile feedback signal (or haptic feedback signal) synchronized with a user touch applied to a touch panel (or touch sensor layer) disposed on or embedded in the display panel 1100, and can vibrate the display panel 1100. Therefore, the display panel 1100 can vibrate based on the vibration of the vibration generating device 1200 to provide at least one or more of auditory and tactile feedback to the user (or viewer).

[0256] According to one embodiment of the present disclosure, the vibration generating device 1200 can be implemented with a size corresponding to the display area AA of the display panel 1100. The size of the vibration generating device 1200 can be 0.9 to 1.1 times the size of the display area AA, but the embodiments of the present disclosure are not limited thereto. For example, the size of the vibration generating device 1200 can be equal to or smaller than the size of the display area AA. For example, the size of the vibration generating device 1200 can be the same as or approximately the same as the display area AA of the display panel 1100, and therefore the vibration generating device 1200 can cover most of the area of ​​the display panel 1100, and the vibration generated by the vibration generating device 1200 can vibrate the entire part of the display panel 1100, and therefore the sound localization can be higher, and user satisfaction can be improved. In addition, the contact area (or panel coverage area) between the display panel 1100 and the vibration generating device 1200 can be increased, and therefore the vibration area of ​​the display panel 1100 can be increased, thereby improving the sound of the mid-to-low tone bands generated by the vibration of the display panel 1100. Furthermore, the vibration generating device 1200 applied to a large-size display device can vibrate the entire display panel 1100 with a large size (or large area), thus enhancing the localization of sound based on the vibration of the display panel 1100, thereby achieving improved sound effects.

[0257] According to one embodiment of the present disclosure, a vibration generating device 1200 may include the above-mentioned references. Figures 1 to 15 One or more of the vibrating devices are described, so repeated descriptions of them can be omitted.

[0258] The device according to one embodiment of the present disclosure may further include a connecting member 1150 disposed between the display panel 1100 and the vibration generating device 1200.

[0259] The connecting member 1150 can be disposed between the display panel 1100 and the vibration generating device 1200, and thus the vibration generating device 1200 can be connected or coupled to the rear surface of the display panel 1100. For example, the vibration generating device 1200 can be directly connected or coupled to the rear surface of the display panel 1100 via the connecting member 1150, and thus can be supported by or disposed on the rear surface of the display panel 1100.

[0260] According to one embodiment of this disclosure, the connecting member 1150 can be configured to include a material with good adhesion or bonding strength relative to the rear surface of the display panel 1100 and each of the vibration generating devices 1200. For example, the connecting member 1150 may include a foam pad, double-sided tape, or adhesive, but embodiments of this disclosure are not limited thereto. For example, the adhesive layer of the connecting member 1150 may include epoxy resin, acrylic resin, silicone resin, or polyurethane, but embodiments of this disclosure are not limited thereto. For example, the adhesive layer of the connecting member 1150 may include an acrylic-based material, which is relatively better in terms of adhesion and hardness among acrylic and polyurethane materials. Therefore, vibrations from the vibration generating device 1200 can be well transmitted to the display panel 1100.

[0261] According to another embodiment of this disclosure, the connecting member 1150 may further include a hollow portion located between the display panel 1100 and the vibration generating device 1200. The hollow portion of the connecting member 1150 can provide an air gap between the display panel 1100 and the vibration generating device 1200. Due to the presence of the air gap, sound waves (or sound pressure) based on the vibration of the vibration generating device 1200 are not dispersed by the connecting member 1150, but are concentrated on the display panel 1100. Therefore, vibration loss caused by the connecting member 1150 can be minimized, thereby improving the sound pressure characteristics of the sound generated based on the vibration of the display panel 1100.

[0262] The device according to one embodiment of the present disclosure may further include a support member 1300 disposed on the rear surface of the display panel 1100.

[0263] The support member 1300 may cover the rear surface of the display panel 1100. For example, the support member 1300 may cover the entire rear surface of the display panel 1100, with a gap space GS therebetween. For example, the support member 1300 may include at least one or more of glass, metal, and plastic materials, but embodiments of this disclosure are not limited thereto. For example, the support member 1300 may be referred to as a rear surface structure, a setting structure, a bottom cover, or a back cover, but embodiments of this disclosure are not limited thereto.

[0264] According to one embodiment of the present disclosure, the support member 1300 may include a first support member 1310 and a second support member 1330.

[0265] The first support member 1310 may cover the rear surface of the display panel 1100. For example, the first support member 1310 may be a member that covers the entire rear surface of the display panel 1100. For example, the first support member 1310 may include at least one or more materials selected from glass, metal and plastic, but the embodiments of this disclosure are not limited thereto. For example, the first support member 1310 may be an inner panel, but the embodiments of this disclosure are not limited thereto.

[0266] The first support member 1310 may be spaced apart from the rearmost surface of the vibration generating device 1200 or the display panel 1100, with a gap space GS therebetween. For example, the gap space GS may be referred to as an air gap, vibration space, resonance chamber, etc., but the embodiments of this disclosure are not limited thereto.

[0267] The second support member 1330 may be disposed on the rear surface of the first support member 1310. The second support member 1330 may be a plate-shaped member covering the entire rear surface of the first support member 1310. For example, the second support member 1330 may include at least one or more materials selected from glass, metal, and plastic, but the embodiments of this disclosure are not limited thereto. For example, the second support member 1330 may be an outer plate, a rear plate, a back plate, a back cover, or a rear cover, but the embodiments of this disclosure are not limited thereto.

[0268] According to one embodiment of the present disclosure, the support member 1300 may further include a connecting member 1350. The connecting member 1350 may be disposed between the first support member 1310 and the second support member 1330. For example, the first support member 1310 and the second support member 1330 may be connected or linked to each other via the connecting member 1350. For example, the connecting member 1350 may be an adhesive resin, double-sided tape, double-sided foam tape, or double-sided adhesive foam pad, but the embodiments of the present disclosure are not limited thereto. For example, the connecting member 1350 may be elastic for absorbing impact, but the embodiments of the present disclosure are not limited thereto. As one embodiment of the present disclosure, the connecting member 1350 may be disposed over the entire area between the first support member 1310 and the second support member 1330. As another embodiment of the present disclosure, the connecting member 1350 may be configured as a mesh structure (or mesh shape) including an air gap between the first support member 1310 and the second support member 1330.

[0269] The device according to one embodiment of the present disclosure may further include an intermediate frame 1400.

[0270] An intermediate frame 1400 may be disposed between the rear outer periphery of the display panel 1100 and the front outer periphery of the support member 1300. The intermediate frame 1400 may support one or more of the rear outer periphery of the display panel 1100 and the front outer periphery of the support member 1300, and may surround one or more of the side surfaces (or lateral surfaces) of each of the display panel 1100 and the support member 1300. The intermediate frame 1400 may provide a clearance space GS between the display panel 1100 and the support member 1300.

[0271] According to one embodiment of this disclosure, the intermediate frame 1400 can be connected to or attached to the rear outer periphery of the display panel 1100 via a first connecting member 1401. The intermediate frame 1400 can be connected to or attached to the rear outer periphery of the support member 1300 via a second connecting member 1403.

[0272] An apparatus according to one embodiment of the present disclosure may include a panel connecting member (or adhesive member) in place of the intermediate frame 1400. The panel connecting member may be disposed between the rear outer periphery of the display panel 1100 and the front outer periphery of the support member 1300, and may provide a gap space GS between the display panel 1100 and the support member 1300. The panel connecting member may be disposed between the rear outer periphery of the display panel 1100 and the front outer periphery of the support member 1300 to attach the display panel 1100 and the support member 1300. For example, the adhesive layer of the panel connecting member (or adhesive member) may be different from the adhesive layer of the connecting member 1150.

[0273] As described above, an apparatus (or display device) according to one embodiment of the present disclosure can output sound generated by the vibration of the display panel 1100 based on the vibration of the vibration generating device 1200 disposed on the rear surface of the display panel 1100 to the forward area in front of the display panel 1100 or the device. The sound generated based on the vibration of the vibration generating device 1200 can be concentrated or focused in a specific direction, and thus a user privacy protection function can be realized, which makes the sound inaudible in the peripheral area (or inaudible area) outside the area (or audible area) in the specific direction.

[0274] exist Figure 16 and Figure 17 The vibration generating device 1200 has been described in the present disclosure for vibrating the display panel 1100 to generate or output sound, but the embodiments of the present disclosure are not limited thereto. For example, the vibration generating device 1200 can vibrate other vibrating objects (or vibrating components) besides the display panel 1100 described above to generate or output sound.

[0275] Figure 18 It is along Figure 16Another cross-sectional view taken from line III-III' shown. Figure 18 Showing how to modify Figure 17 The embodiment shown is implemented using the vibration generating device. Therefore, in the following description, repeated descriptions of components other than the vibration generating device and its related elements may be omitted or will be given only briefly.

[0276] Reference Figure 16 and Figure 18 In another embodiment of the device according to this disclosure, the display panel 1100 may include a first rear region RA1 and a second rear region RA2. For example, the first rear region RA1 may be a right rear region, and the second rear region RA2 may be a left rear region. The first rear region RA1 and the second rear region RA2 may be symmetrical about left and right with respect to the center line CL of the display panel 1100 in the first direction X, but the embodiments of this disclosure are not limited thereto. For example, each of the first rear region RA1 and the second rear region RA2 may overlap with the display area AA of the display panel 1100.

[0277] According to another embodiment of the present disclosure, the vibration generating device 1200 may include a first vibration generating device 1200-1 and a second vibration generating device 1200-2.

[0278] The first vibration generating device 1200-1 may be disposed in the first rear region RA1 of the display panel 1100. Based on the characteristics of the first sound or the sound characteristics required by the device, the first vibration generating device 1200-1 may have the same size as the first rear region RA1 of the display panel 1100, or it may have a smaller size than the first rear region RA1 of the display panel 1100. For example, the first vibration generating device 1200-1 may be disposed near the center or periphery of the first rear region RA1 of the display panel 1100 relative to the first direction X.

[0279] According to one embodiment of this disclosure, the first vibration generating device 1200-1 can vibrate the first rear region RA1 of the display panel 1100, and thus can generate a first sound, at least one of a first vibration sound, a first directional vibration sound, and a first tactile feedback. For example, the first vibration generating device 1200-1 can directly vibrate the first rear region RA1 of the display panel 1100, and thus can generate a first sound in the first rear region RA1 of the display panel 1100. For example, the first sound may be a right sound.

[0280] The second vibration generating device 1200-2 may be disposed in the second rear region RA2 of the display panel 1100. Based on the characteristics of the second sound or the sound characteristics required by the device, the second vibration generating device 1200-2 may have the same size as the second rear region RA2 of the display panel 1100, or it may have a smaller size than the second rear region RA2 of the display panel 1100. For example, the second vibration generating device 1200-2 may be positioned near the center or periphery of the second rear region RA2 of the display panel 1100 relative to the first direction X.

[0281] According to one embodiment of this disclosure, the second vibration generating device 1200-2 can vibrate the second rear region RA2 of the display panel 1100, and thus can generate a second sound, at least one of a second vibration sound, a second directional vibration sound, and a second tactile feedback. For example, the second vibration generating device 1200-2 can directly vibrate the second rear region RA2 of the display panel 1100, and thus can generate a second sound in the second rear region RA2 of the display panel 1100. For example, the second sound may be a left-facing sound.

[0282] Based on the sound characteristics of left and right sounds and / or the sound characteristics of the device, the first vibration generating device 1200-1 and the second vibration generating device 1200-2 may have the same or different dimensions. Furthermore, the first vibration generating device 1200-1 and the second vibration generating device 1200-2 may be configured as either symmetrical or asymmetrical with respect to the center line CL of the display panel 1100.

[0283] Each of the first vibration generating device 1200-1 and the second vibration generating device 1200-2 may include the above reference. Figures 1 to 15 One or more of the vibrating devices are described, so repeated descriptions of them can be omitted.

[0284] Each of the first vibration generating device 1200-1 and the second vibration generating device 1200-2 can be disposed on the rear surface of the display panel 1100 via a connecting member 1150. The connecting member 1150 can be connected to the aforementioned reference... Figure 17 The described connecting member 1150 is substantially the same, and therefore, its repeated description can be omitted.

[0285] According to another embodiment of the present disclosure, the device (or display device) can output left and right sounds to the forward area in front of the display panel 1100 through the first vibration generating device 1200-1 and the second vibration generating device 1200-2. The sound generated by the vibration of each of the first vibration generating device 1200-1 and the second vibration generating device 1200-2 can be concentrated or focused in a specific direction, and thus a user privacy protection function can be realized, which makes the sound inaudible in the peripheral area (or inaudible area) outside the area (or audible area) in the specific direction.

[0286] According to another embodiment of the present disclosure, the device may further include a plate 1170 disposed between the display panel 1100 and the vibration generating device 1200.

[0287] Plate 1170 may have the same shape and size as the rear surface of display panel 1100, or it may have the same shape and size as vibration generating device 1200. In another embodiment of this disclosure, plate 1170 may have a different size than display panel 1100. For example, plate 1170 may be smaller than the size of display panel 1100. In another embodiment of this disclosure, plate 1170 may have a different size than vibration generating device 1200. For example, plate 1170 may be larger or smaller than the size of vibration generating device 1200. Vibration generating device 1200 may have the same size as or smaller than the size of display panel 1100.

[0288] Plate 1170 can be connected or attached to the rear surface of display panel 1100 via plate connecting member (or connecting member or linking member) 1190. Therefore, vibration generating device 1200 can be connected or attached to the rear surface of plate 1170 via linking member 1150, and can therefore be supported or suspended at the rear surface of plate 1170.

[0289] According to one embodiment of the present disclosure, the plate 1170 may include a plurality of openings. The plurality of openings may be configured to have predetermined dimensions and predetermined intervals. For example, the plurality of openings may be formed along a first direction X and a second direction Y to have predetermined dimensions and predetermined intervals. Due to the plurality of openings, sound waves (or sound pressure levels) based on the vibration of the vibration generating device 1200 may not be dispersed by the plate 1170, but may be concentrated on the display panel 1100. Therefore, the loss of vibration caused by the plate 1170 can be minimized, thereby improving the sound pressure level characteristics of the sound generated based on the vibration of the display panel 1100 (or the vibrating object or vibrating member). For example, the plate 1170 including the plurality of openings may have a mesh shape. For example, the plate 1170 including the plurality of openings may be a mesh plate.

[0290] According to one embodiment of this disclosure, plate 1170 may include a metallic material. For example, plate 1170 may include any one or more materials such as stainless steel, aluminum (Al), magnesium (Mg), magnesium (Mg) alloy, magnesium-lithium (Mg-Li) alloy, and aluminum alloy, but embodiments of this disclosure are not limited thereto. Therefore, plate 1170 can serve as a heat dissipation plate for dissipating heat in display panel 1100.

[0291] According to one embodiment of this disclosure, a plate 1170 comprising a metallic material can increase the mass of a vibration generating device 1200 disposed on or suspended from the rear surface of a display panel 1100. Therefore, the plate 1170 can reduce the resonant frequency of the vibration generating device 1200 based on the increased mass of the vibration generating device 1200. Thus, the plate 1170 can improve the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords generated by the vibration of the vibration generating device 1200, and can enhance the flatness of the sound pressure level characteristics. For example, the flatness of the sound pressure level characteristics can be the magnitude of the deviation between the highest and lowest sound pressure levels. For example, the plate 1170 can be referred to as a weight member, a mass member, a sound flattening member, etc., but embodiments of this disclosure are not limited thereto.

[0292] The vibration device according to one embodiment of this disclosure can be applied to vibration devices installed in devices. The device according to one embodiment 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, car navigation devices, car display devices, automotive equipment, cinema equipment, cinema display devices, televisions, wallpaper display devices, signage devices, gaming devices, laptops, monitors, cameras, camcorders, home appliances, etc. Furthermore, the vibration device according to one embodiment of this disclosure can be applied to organic light-emitting lighting devices or inorganic light-emitting lighting devices. When the vibration device according to one embodiment of this disclosure is applied to a lighting device, the vibration device can function as both a lighting device and a speaker. Furthermore, when a vibration device according to one embodiment of the present disclosure is applied to a mobile device or the like, the vibration device may function as one or more of a speaker, a receiver, and a tactile device, but the embodiments of the present disclosure are not limited thereto.

[0293] The apparatus according to one embodiment of the present disclosure will now be described.

[0294] An apparatus according to one embodiment of the present disclosure may include a vibration device, which may include: a vibration portion comprising a piezoelectric material; a first electrode portion located at a first surface of the vibration portion and configured as a plurality of circular patterns; and a second electrode portion located at a second surface of the vibration portion different from the first surface and configured as a single electrode, and the vibration device may generate ultrasonic waves.

[0295] According to some embodiments of this disclosure, a plurality of first electrode portions may be provided, the plurality of first electrode portions may be configured to have the same radius, and the resonant frequency of the vibration device may have a resonant point.

[0296] According to some embodiments of this disclosure, the vibration device may further include: a circuit section located at a first surface of the vibration section; and a pad section located on one side of the vibration section, wherein the circuit section can connect the first electrode section to the pad section.

[0297] According to some embodiments of the present disclosure, the vibration device may further include: a first cover member located at a first surface of the vibration device; and a second cover member located at a second surface of the vibration device that is different from the first surface.

[0298] According to some embodiments of this disclosure, the vibration device may include a first region to a fourth region configured to be driven independently.

[0299] According to some embodiments of the present disclosure, the vibration device may include: a first pad portion located in a first region and a plurality of first electrode portions connected to the first pad portion; a second pad portion located in a second region and a plurality of first electrode portions connected to the second pad portion; a third pad portion located in a third region and a plurality of first electrode portions connected to the third pad portion; and a fourth pad portion located in a fourth region and a plurality of first electrode portions connected to the fourth pad portion, wherein each of the first electrode portions in the first to fourth regions may be electrically disconnected from each other.

[0300] According to some embodiments of the present disclosure, the vibration device may further include a wiring section located on the first surface of the vibration section, and the wiring section may connect the first pad section to the fourth pad section to the first electrode section of the first region to the fourth region, respectively.

[0301] A vibration device according to some embodiments of the present disclosure may include a vibration apparatus, which may include: a vibration portion comprising a piezoelectric material; an ultrasonic electrode portion located on a first surface of the vibration portion and configured in a plurality of circular patterns; a sound electrode portion configured to surround the ultrasonic electrode portion; and a second electrode portion located on a second surface of the vibration portion different from the first surface and configured as a single electrode. The vibration apparatus may generate a first sound and a second sound, wherein the first sound may be ultrasonic and the second sound may have an audible frequency.

[0302] According to some embodiments of this disclosure, multiple ultrasonic electrode portions can be provided, the multiple ultrasonic electrode portions can be configured to have the same radius, and the resonant frequency of the vibration device can have a resonant point.

[0303] According to some embodiments of the present disclosure, the vibration device may further include: a circuit section located at a first surface of the vibration section; and an ultrasonic pad section located on one side of the vibration section, wherein the circuit section can connect the ultrasonic electrode section to the ultrasonic pad section.

[0304] According to some embodiments of the present disclosure, the vibration device may further include: a first cover member located at a first surface of the vibration device; and a second cover member located at a second surface of the vibration device that is different from the first surface.

[0305] According to some embodiments of this disclosure, the vibration portion may include: a first vibration portion comprising a piezoelectric material and overlapping with an ultrasonic electrode portion; a second vibration portion configured as an organic material portion and surrounding the first vibration portion; and a third vibration portion comprising a piezoelectric material and overlapping with an acoustic electrode portion.

[0306] A vibration device according to some embodiments of the present disclosure may include a vibration apparatus, which may include: a vibration part comprising a piezoelectric material; a finger-shaped first electrode part located at a first surface of the vibration part; and a finger-shaped acoustic electrode part located at a second surface of the vibration part different from the first surface, the first electrode part comprising a first engraved pattern, the second electrode part comprising a second engraved pattern, the first engraved pattern and the second engraved pattern constituting a plurality of circular patterns, and the vibration apparatus generating ultrasonic waves.

[0307] According to some embodiments of this disclosure, multiple circular patterns are configured to have the same radius, and the resonant frequency of the vibrating device may have a single resonant point.

[0308] According to some embodiments of the present disclosure, the vibration device may further include: a first cover member located at a first surface of the vibration device; and a second cover member located at a second surface of the vibration device that is different from the first surface.

[0309] An apparatus according to some embodiments of the present disclosure may include: a vibrating object; a vibration generating device located at the vibrating object; and a connecting member located between the vibrating object and the vibration generating device, wherein the vibration generating device may include the aforementioned vibrating device.

[0310] According to some embodiments of this disclosure, the vibrating object may be a display panel including a plurality of pixels configured to display an image, the display panel may include a first rear region and a second rear region, and the vibration generating device may include: a first vibration generating device located at the first rear region of the display panel, and a second vibration generating device located at the second rear region of the display panel.

[0311] According to some embodiments of this disclosure, the device may also include a plate located between the vibrating object and the vibration generating device.

[0312] According to some embodiments of this disclosure, the vibrating object may include one or more of the following: a display panel including a plurality of pixels configured to display an image, a screen panel on which an image is to be projected from a display device, a lighting panel, a sign panel, vehicle interior materials, vehicle windows, vehicle exterior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, wood, plastic, glass, metal, cloth, fiber, paper, rubber, leather, carbon, and mirrors.

[0313] It will be apparent to those skilled in the art that various modifications and variations can be made to the vibration device and the sound device including the vibration device of this disclosure without departing from the technical spirit or scope of this disclosure. Therefore, this disclosure is intended to cover modifications and variations thereof, provided they fall within the scope of the appended claims and their equivalents.

[0314] Cross-reference to related applications

[0315] This application claims the benefit of Korean Patent Application No. 10-2021-0194784, filed on December 31, 2021, which is incorporated herein by reference as if fully set forth herein.

Claims

1. A vibration device, the vibration device comprising: Vibration device The vibration device includes: A single vibrating element, the vibrating element comprising a piezoelectric material; A first electrode portion, located at a first surface of the vibrating portion and configured in a plurality of circular patterns; and A single second electrode portion, the single second electrode portion being located at a second surface of the vibrating portion that is different from the first surface, and Wherein, at least some of the plurality of circular patterns are connected to each other, and The single vibrating part and the single second electrode part overlap with all of the plurality of circular patterns.

2. The vibration device according to claim 1, in, The vibration device generates ultrasonic waves.

3. The vibration device according to claim 1, in, The plurality of circular patterns are configured to have the same radius, and The resonant frequency of the vibration device has a resonant point.

4. The vibration device according to claim 1, wherein, The vibration device also includes: The circuit section, located at the first surface of the vibrating part; and The pad portion is located on one side of the vibrating part, and The circuit section connects the first electrode section to the pad section.

5. The vibration device according to claim 1, further comprising: A first cover component is located at a first surface of the vibration device; as well as The second cover member is located on a second surface of the vibration device that is different from the first surface.

6. The vibration device according to claim 1, wherein, The vibration device includes at least two regions configured to be driven independently.

7. The vibration device according to claim 6, in, The vibration device includes: A first pad portion located in a first region and a plurality of first electrode portions connected to the first pad portion; A second pad portion located in the second region and a plurality of first electrode portions connected to the second pad portion; A third pad portion located in the third region and a plurality of first electrode portions connected to the third pad portion; and The fourth pad portion located in the fourth region and a plurality of first electrode portions connected to the fourth pad portion, and The first electrode portions located in the first region to the fourth region are electrically disconnected from each other.

8. The vibration device according to claim 7, in, The vibration device further includes a wiring section located at the first surface of the vibrating part, and The circuit section connects the first pad section to the fourth pad section to the first electrode section of the first region to the fourth region, respectively.

9. The vibration device according to claim 1, further comprising a vibration drive circuit. in, The vibration drive circuit provides a first polarity signal to the first electrode portion and a second polarity signal to the second electrode portion.

10. The vibration device according to claim 1, in, The second electrode section is configured as a single electrode.

11. A vibration device, the vibration device comprising: Vibration device The vibration device includes: The vibrating part includes a piezoelectric material; An ultrasonic electrode portion, which is located on the first surface of the vibrating portion and is configured in a plurality of circular patterns; Sound electrode portion, the sound electrode portion being configured to surround the ultrasonic electrode portion; and The second electrode portion is located on a second surface of the vibrating portion that is different from the first surface and is configured as a single electrode. The vibration device generates ultrasonic waves and a second sound with an audible frequency. At least some of the plurality of circular patterns are connected to each other. The vibrating part includes: A first vibration part, the first vibration part comprising a piezoelectric material and overlapping with the ultrasonic electrode part; A second vibrating part, the second vibrating part being configured as an organic material part and surrounding the first vibrating part; and The third vibration part includes a piezoelectric material and overlaps with the sound electrode part.

12. The vibration device according to claim 11, in, The plurality of circular patterns are configured to have the same radius, and The resonant frequency of the vibration device has a resonant point.

13. The vibration device according to claim 11, in, The vibration device also includes: The circuit section, located at the first surface of the vibrating part; and An ultrasonic pad portion, wherein the ultrasonic pad portion is located on one side of the vibrating portion, and The circuit section connects the ultrasonic electrode section to the ultrasonic pad section.

14. The vibration device according to claim 11, further comprising: A first cover component is located at a first surface of the vibration device; as well as The second cover member is located on a second surface of the vibration device that is different from the first surface.

15. A vibration device, the vibration device comprising: Vibration device The vibration device includes: A single vibrating element, the vibrating element comprising a piezoelectric material; A finger-shaped first electrode portion, the first electrode portion being located at the first surface of the vibrating portion; and A finger-shaped second electrode portion is located at the first surface of the vibrating portion. The first electrode portion includes a first engraved pattern. The second electrode portion includes a second engraved pattern. The first and second engraved patterns constitute multiple circular patterns. No electrodes are formed within these circular patterns, and a horizontal polarization direction is established. At least some of the plurality of circular patterns are connected to each other.

16. The vibration device according to claim 15, in, The vibration device generates ultrasonic waves.

17. The vibration device according to claim 15, in, The plurality of circular patterns are configured to have the same radius, and The resonant frequency of the vibration device has a resonant point.

18. The vibration device according to claim 15, further comprising: A first cover component is located at a first surface of the vibration device; as well as The second cover member is located on a second surface of the vibration device that is different from the first surface.

19. The vibration device according to claim 15, in, Multiple first electrode portions and multiple second electrode portions are joined to each other and spaced apart from each other along a first direction.

20. The vibration device according to claim 19, in, A first polarity signal is provided to the plurality of first electrode portions, and a second polarity signal is provided to the plurality of second electrode portions, such that vibration portions having a polarization direction parallel to the first direction and vibration portions having different polarization directions are arranged alternately and repeatedly along the first direction.

21. A sound device, the sound device comprising: Vibrating object; A vibration generating device, wherein the vibration generating device is located at the vibrating object; as well as A connecting member, located between the vibrating object and the vibration generating device. The vibration generating device includes the vibration device according to any one of claims 1 to 20.

22. The sound device according to claim 21, in, The vibrating object is a display panel comprising a plurality of pixels configured to display an image. The display panel includes a first rear region and a second rear region, and The vibration generating device includes: A first vibration generating device is located in the first rear region of the display panel, and The second vibration generating device is located in the second rear region of the display panel.

23. The sound device according to claim 21, the sound device further comprising a plate located between the vibrating object and the vibration generating device.

24. The sound device according to claim 21, wherein, The vibrating object includes one or more of the following: a display panel comprising a plurality of pixels configured to display an image, a screen panel onto which an image is projected from a display device, a lighting panel, a sign panel, vehicle interior materials, vehicle windows, vehicle exterior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, wood, plastic, glass, metal, cloth, fiber, paper, rubber, leather, carbon, and mirrors.

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