Vibration device and electronic device including the same

Abstract

The present application relates to a vibration device and an electronic device including the same. A device includes a display panel displaying an image and a vibration device arranged at a rear surface of the display panel to vibrate the display panel. The vibration device may include a plurality of vibration generators overlapping each other. Therefore, sound may be generated based on the vibration of the display panel, and sound with enhanced sound pressure level characteristics may be output in a forward direction of the display panel.

Description

Technical Field

[0001] The present disclosure relates to a vibration device and a device including the same. Background Art

[0002] In a display device, a display panel displays an image, and a separate speaker should be installed for providing sound. When the speaker is in the display device, the speaker occupies space; due to this, the design and spatial arrangement of the display device are limited.

[0003] However, since the sound output from the speaker may travel to the rear or downward direction of the display device, the sound quality may be degraded due to interference between the sound reflected from the wall and the ground. For this reason, it may be difficult to transmit accurate sound and reduce the immersive experience of the viewer. Summary of the invention

[0004] The inventors have recognized the above problems and have conducted various experiments for realizing a vibration device for enhancing the quality and sound pressure characteristics of sound. Therefore, through various experiments, the inventors have invented a device with a new structure, which includes a vibration device for enhancing the quality and sound pressure characteristics of sound. Therefore, embodiments of the present disclosure are directed to a device that substantially eliminates one or more problems caused by limitations and disadvantages of the related art.

[0005] An aspect of the present disclosure is to provide a vibration device that vibrates a display panel to generate sound and includes enhanced sound pressure level characteristics, and a device including the same.

[0006] Another aspect of the present disclosure is to provide a vibration device and a device including the same, the vibration device improves the sound characteristics of the low-pitched sound band generated according to the displacement of the display panel by increasing the amplitude displacement of the display panel.

[0007] Additional features and aspects will be explained in part in the following description, and in part will become apparent from the description or can be learned through the practice of the inventive concept provided herein. Other features and aspects of the inventive concept can be realized and obtained through the structures specifically pointed out in the written description (or the structures derivable therefrom), the claims and the accompanying drawings.

[0008] To achieve these and other aspects of the inventive concept, as embodied and broadly described herein, a device includes: a display panel configured to display an image; and a vibration device at a rear surface of the display panel to vibrate the display panel, the vibration device including a plurality of vibration generators overlapping each other.

[0009] In another aspect of the present disclosure, a device includes: a display panel configured to display an image; a vibration device at a rear surface of the display panel; and a plate disposed between the display panel and the vibration device, the vibration device including: a plurality of vibration generators stacked to be displaced in the same direction; and an adhesive member between the plurality of vibration generators.

[0010] In another aspect of the present disclosure, a vibration device includes: a plurality of vibration generators stacked to be displaced in the same direction; and a bonding member between the plurality of vibration generators.

[0011] In another aspect of the present disclosure, an apparatus includes: a vibrating object; and a vibrating apparatus, wherein in the vibrating object, the vibrating apparatus includes: a plurality of vibration generators stacked to be displaced in the same direction; and a bonding member between the plurality of vibration generators.

[0012] The device according to an embodiment of the present disclosure may vibrate the display panel to generate sound and may output the sound having enhanced sound pressure level characteristics in a front direction of the display panel.

[0013] In the device according to an embodiment of the present disclosure, as the amplitude displacement of the display panel increases, the middle-pitched vocal band, the low-pitched vocal band and / or the middle-low-pitched vocal band characteristics of the sound generated based on the displacement of the display panel may be enhanced.

[0014] In the vibration device according to the embodiment of the present disclosure, the middle-pitched vocal range, the low-pitched vocal range, and / or the middle-low pitch vocal range characteristics of the sound generated based on the displacement of the vibration plate may be enhanced.

[0015] Other systems, methods, features, and aspects will be or will become apparent to one skilled in the art upon review of the following figures and detailed description. It is intended that all such additional systems, methods, features, and aspects be included in this specification, be within the scope of the present disclosure, and be protected by the appended claims. Nothing in this section shall be construed as limiting these claims. Additional aspects and features are discussed below in conjunction with embodiments of the present disclosure.

[0016] It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed.

[0017] Note:

[0018] Note 1. An electronic device, comprising:

[0019] A display panel configured to display an image; and

[0020] a vibration device at a rear surface of the display panel to vibrate the display panel,

[0021] Wherein, the vibration device includes a plurality of vibration generators overlapping each other.

[0022] Supplement 2. The electronic device according to Supplement 1, wherein each of the plurality of vibration generators is displaced in the same direction.

[0023] Supplement 3. The electronic device according to Supplement 1, wherein each of the plurality of vibration generators has the same size.

[0024] Supplementary note 4. The electronic device according to Supplementary note 1, wherein an end portion of each of the plurality of vibration generators is aligned on a virtual extension line extending in a thickness direction of the display panel.

[0025] Note 5. An electronic device, comprising:

[0026] a display panel, the display panel being configured to display an image;

[0027] a vibration device at a rear surface of the display panel; and

[0028] a plate disposed between the display panel and the vibration device,

[0029] Wherein, the vibration device comprises:

[0030] a plurality of vibration generators stacked to be displaced in the same direction; and

[0031] A bonding member is provided between the plurality of vibration generators.

[0032] Supplementary note 6. The electronic device according to Supplementary note 5, wherein the plurality of vibration generators are symmetrical to each other with respect to the bonding member.

[0033] Note 7. The electronic device according to Note 5,

[0034] The display panel includes a first area and a second area.

[0035] The vibration device includes a first vibration device disposed at the first area and a second vibration device disposed at the second area, and

[0036] Wherein, each of the first vibration device and the second vibration device includes the plurality of vibration generators and the bonding member.

[0037] Note 8. The electronic device according to Note 7, further comprising:

[0038] a supporting member disposed at the rear surface of the display panel; and

[0039] A spacer is disposed between the rear surface of the display panel and the support member, the spacer being between the first area and the second area.

[0040] Note 9. The electronic device according to Note 7,

[0041] Wherein, the vibration device also includes:

[0042] a third vibration device, the third vibration device being disposed in the first area; and

[0043] a fourth vibration device, the fourth vibration device being arranged in the second area, and

[0044] Wherein, each of the third vibration device and the fourth vibration device includes the plurality of vibration generators and the bonding member.

[0045] Note 10. The electronic device according to Note 9,

[0046] wherein the first vibration device and the third vibration device are arranged in parallel or staggered in the first area, and

[0047] Wherein, the second vibration device and the fourth vibration device are arranged in parallel or staggered in the second area.

[0048] Supplement 11. The electronic device according to any one of Supplements 1 to 10, wherein each of the plurality of vibration generators comprises:

[0049] Vibrating structures;

[0050] a first protection member disposed at a first surface of the vibration structure; and

[0051] A second protective member is provided at a second surface of the vibration structure different from the first surface.

[0052] Note 12. The electronic device according to Note 11, wherein the vibration structure comprises:

[0053] Vibration part;

[0054] a first electrode portion provided between the vibration portion and the first protection member; and

[0055] A second electrode portion is provided between the vibration portion and the second protection member.

[0056] Supplement 13. The electronic device according to any one of Supplements 1 to 10, wherein each of the plurality of vibration generators comprises:

[0057] a vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion having an organic material between the plurality of inorganic material portions;

[0058] a first electrode portion provided at a first surface of the vibration portion; and

[0059] A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

[0060] Note 14. The electronic device according to Note 13,

[0061] wherein the inorganic material portion of the vibration generator disposed at the upper layer among the plurality of vibration generators overlaps with the inorganic material portion of the vibration generator disposed at the lower layer among the plurality of vibration generators, and / or

[0062] The organic material portion of the vibration generator disposed on the upper layer overlaps the organic material portion of the vibration generator disposed on the lower layer.

[0063] Supplement 15. The electronic device according to any one of Supplements 1 to 10, wherein the adhesive member comprises a first adhesive layer and a second adhesive layer, and wherein each of the plurality of vibration generators comprises:

[0064] a plurality of vibration generating parts, the plurality of vibration generating parts being arranged along a first direction and a second direction crossing the first direction;

[0065] a first protective member provided at a first surface of each of the plurality of vibration generating parts through the first adhesive layer; and

[0066] A second protective member is provided at a second surface of each of the plurality of vibration generating parts through the second adhesive layer.

[0067] Supplementary note 16. The electronic device according to Supplementary note 15, wherein the plurality of vibration generating parts are electrically separated from each other and spaced a distance from each other.

[0068] Supplementary note 17. The electronic device according to Supplementary note 16, wherein the distance is in the range from 0.1 mm to 3 cm.

[0069] Supplementary note 18. The electronic device according to Supplementary note 15, wherein the first adhesive layer and the second adhesive layer are coupled to each other to surround the plurality of vibration generating portions.

[0070] Supplement 19. The electronic device according to Supplement 15, wherein each of the plurality of vibration generating parts comprises:

[0071] Vibration part;

[0072] a first electrode portion provided at a first surface of the vibration portion; and

[0073] A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

[0074] Supplement 20. The electronic device according to Supplement 19, wherein the vibration part comprises:

[0075] a plurality of inorganic material portions; and

[0076] an organic material portion between the plurality of inorganic material portions.

[0077] Note 21. The electronic device according to Note 20,

[0078] wherein the inorganic material portion of the vibration generator disposed at the upper layer among the plurality of vibration generators overlaps with the inorganic material portion of the vibration generator disposed at the lower layer among the plurality of vibration generators, and / or

[0079] The organic material portion of the vibration generator disposed on the upper layer overlaps the organic material portion of the vibration generator disposed on the lower layer.

[0080] Note 22. The electronic device according to any one of Notes 1 to 10,

[0081] Wherein, each of the plurality of vibration generators comprises:

[0082] Vibration part;

[0083] a first electrode portion provided at a first surface of the vibration portion; and

[0084] a second electrode portion provided at a second surface of the vibration portion different from the first surface, and

[0085] The first electrode portion of each of the plurality of vibration generators is disposed closer to the display panel than the second electrode portion.

[0086] Supplement 23. The electronic device according to Supplement 22 further comprises a vibration driving circuit, wherein the vibration driving circuit comprises a plurality of amplifiers respectively connected to the plurality of vibration generators,

[0087] wherein the plurality of vibration generators include a first group and a second group,

[0088] The plurality of amplifiers include a first amplifier group and a second amplifier group,

[0089] wherein the amplifier of the first amplifier group includes a first output terminal connected to a first electrode portion of the vibration generator of the first group, and a second output terminal connected to a second electrode portion of the vibration generator of the first group, and

[0090] The amplifier of the second amplifier group includes a first output terminal connected to the second electrode portion of the vibration generator of the second group, and a second output terminal connected to the first electrode portion of the vibration generator of the second group.

[0091] Note 24. The electronic device according to any one of Notes 1 to 10, wherein each of the plurality of vibration generators comprises:

[0092] Vibration part;

[0093] a first electrode portion provided at a first surface of the vibration portion; and

[0094] a second electrode portion provided at a second surface of the vibration portion different from the first surface,

[0095] wherein the plurality of vibration generators include a first group and a second group,

[0096] wherein, in the vibration generator of the first group, the first electrode portion is disposed closer to the display panel than the second electrode portion, and

[0097] Among them, in the vibration generator of the second group, the second electrode portion is arranged closer to the display panel than the first electrode portion.

[0098] Note 25. The electronic device according to Note 24, further comprising a vibration driving circuit, wherein the vibration driving circuit comprises a plurality of amplifiers respectively connected to the plurality of vibration generators,

[0099] Wherein, each of the plurality of amplifiers comprises:

[0100] a first output terminal connected to a first electrode portion of a corresponding vibration generator among the plurality of vibration generators; and

[0101] A second output terminal connected to a second electrode portion of a corresponding vibration generator among the plurality of vibration generators.

[0102] Note 26. A vibration device, comprising:

[0103] a plurality of vibration generators stacked to be displaced in the same direction; and

[0104] A bonding member is provided between the plurality of vibration generators.

[0105] Supplementary note 27. The vibration device according to Supplementary note 26, wherein the plurality of vibration generators are symmetrical to each other with respect to the bonding member.

[0106] Supplementary note 28. The vibration device according to Supplementary note 26, wherein each of the plurality of vibration generators has the same size.

[0107] Supplementary note 29. The vibration device according to Supplementary note 26, wherein an end portion of each of the plurality of vibration generators is aligned on a virtual extension line extending in a thickness direction of the vibration device.

[0108] Supplementary note 30. The vibration device according to Supplementary note 26, further comprising a plate provided at an uppermost vibration generator among the plurality of vibration generators.

[0109] Supplementary note 31. The vibration device according to Supplementary note 30, wherein the plate and each of the plurality of vibration generators have the same size.

[0110] Note 32. The vibration device according to Note 30, wherein the plate comprises a metal material, or comprises one or more single non-metallic materials or composite non-metallic materials selected from the group consisting of wood, plastic, glass, cloth and leather.

[0111] Supplement 33. The vibration device according to any one of Supplements 26 to 32, wherein the adhesive member includes a first adhesive layer and a second adhesive layer, and wherein each of the plurality of vibration generators includes:

[0112] a plurality of vibration generating parts, the plurality of vibration generating parts being arranged along a first direction and a second direction crossing the first direction;

[0113] a first protective member provided at a first surface of each of the plurality of vibration generating parts through the first adhesive layer; and

[0114] A second protective member is provided at a second surface of each of the plurality of vibration generating parts through the second adhesive layer.

[0115] Supplementary note 34. The vibration device according to Supplementary note 33, wherein the plurality of vibration generating parts are electrically separated from each other and spaced a distance from each other.

[0116] Supplementary note 35. The vibration device according to Supplementary note 34, wherein the distance is in the range from 0.1 mm to 3 cm.

[0117] Supplementary note 36. The vibration device according to Supplementary note 33, wherein the first adhesive layer and the second adhesive layer are coupled to each other to surround the plurality of vibration generating portions.

[0118] Supplement 37. The vibration device according to Supplement 33, wherein each of the plurality of vibration generating parts comprises:

[0119] Vibration part;

[0120] a first electrode portion provided at a first surface of the vibration portion; and

[0121] A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

[0122] Supplement 38. The vibration device according to Supplement 37, wherein the vibration part comprises:

[0123] a plurality of inorganic material portions; and

[0124] an organic material portion between the plurality of inorganic material portions.

[0125] Note 39. The vibration device according to Note 38,

[0126] wherein the inorganic material portion of the vibration generator disposed at the upper layer among the plurality of vibration generators overlaps with the inorganic material portion of the vibration generator disposed at the lower layer among the plurality of vibration generators, and / or

[0127] The organic material portion of the vibration generator disposed on the upper layer overlaps the organic material portion of the vibration generator disposed on the lower layer.

[0128] Supplement 40. The vibration device according to any one of Supplements 26 to 32, wherein each of the plurality of vibration generators comprises:

[0129] a vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion having an organic material between the plurality of inorganic material portions;

[0130] a first electrode portion provided at a first surface of the vibration portion; and

[0131] A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

[0132] Supplement 41. The vibration device according to Supplement 40, further comprising a vibration driving circuit, wherein the vibration driving circuit comprises a plurality of amplifiers respectively connected to the plurality of vibration generators,

[0133] wherein the plurality of vibration generators include a first group and a second group,

[0134] The plurality of amplifiers include a first amplifier group and a second amplifier group,

[0135] wherein the amplifier of the first amplifier group includes a first output terminal connected to a first electrode portion of the vibration generator of the first group, and a second output terminal connected to a second electrode portion of the vibration generator of the first group, and

[0136] The amplifier of the second amplifier group includes a first output terminal connected to the second electrode portion of the vibration generator of the second group, and a second output terminal connected to the first electrode portion of the vibration generator of the second group.

[0137] Note 42. An electronic device, comprising:

[0138] vibrating objects; and

[0139] a vibration device, wherein the vibration device is located at the vibration object,

[0140] Wherein, the vibration device comprises:

[0141] a plurality of vibration generators stacked to be displaced in the same direction; and

[0142] A bonding member is provided between the plurality of vibration generators.

[0143] Supplementary note 43. The electronic device according to Supplementary note 42, wherein the plurality of vibration generators are symmetrical to each other with respect to the bonding member.

[0144] Supplement 44. The electronic device according to Supplement 42, wherein each of the plurality of vibration generators has the same size.

[0145] Supplementary note 45. The electronic device according to Supplementary note 42, wherein an end portion of each of the plurality of vibration generators is aligned on a virtual extension line extending in a thickness direction of the vibration device.

[0146] Note 46. The electronic device according to Note 42, wherein:

[0147] The vibrating object comprises a plate, and

[0148] The board includes a metal material, or includes one or more single non-metal materials or composite non-metal materials selected from wood, plastic, glass, cloth and leather.

[0149] Supplementary note 47. The electronic device according to Supplementary note 46, wherein the plate and each of the plurality of vibration generators have the same size.

[0150] Note 48. An electronic device according to Note 42, wherein the vibrating object includes a display panel, the display panel includes a plurality of pixels configured to display an image, or the vibrating object includes a non-display panel of any one of a light emitting diode lighting panel, an organic light emitting lighting panel and an inorganic light emitting lighting panel.

[0151] Note 49. An electronic device according to Note 42, wherein the vibrating object includes a display panel, the display panel includes a plurality of pixels configured to display an image, or the vibrating object includes one or more of vehicle interior materials, vehicle glass windows, building ceilings, building glass windows, building interior materials, aircraft interior materials and aircraft glass windows.

[0152] Note 50. The electronic device according to any one of Notes 42 to 49, wherein each of the plurality of vibration generators comprises:

[0153] a vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion having an organic material between the plurality of inorganic material portions;

[0154] a first electrode portion provided at a first surface of the vibration portion; and

[0155] A second electrode portion is provided at a second surface of the vibration portion different from the first surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0156] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

[0157] Figure 1 A device according to an embodiment of the present disclosure is illustrated.

[0158] Figure 2 It is along Figure 1 A cross-sectional view taken along line II' shown in FIG.

[0159] Figure 3 A vibration device according to an embodiment of the present disclosure is illustrated.

[0160] Figure 4 It is along Figure 3 A cross-sectional view taken along line II-II' shown in FIG.

[0161] Figure 5 A vibration driving circuit according to an embodiment of the present disclosure is illustrated.

[0162] Fig. 6A The displacement of the vibration generator according to the embodiment of the present disclosure is illustrated.

[0163] Figure 6B The displacement of the vibration device according to the embodiment of the present disclosure is illustrated.

[0164] Figure 7 A vibration device according to another embodiment of the present disclosure is illustrated.

[0165] Figure 8 It is along Figure 7 A cross-sectional view taken along line III-III' shown in FIG.

[0166] Fig. 9 A vibration driving circuit according to another embodiment of the present disclosure is illustrated.

[0167] Fig.10 A vibration device according to another embodiment of the present disclosure is illustrated.

[0168] Fig.11 Illustrated Fig.10 The vibration part illustrated in FIG.

[0169] Fig.12 It is along Fig.10 A cross-sectional view taken along line IV-IV' shown in FIG.

[0170] Fig.13 A vibration device according to another embodiment of the present disclosure is illustrated.

[0171] Fig.14A vibration device according to another embodiment of the present disclosure is illustrated.

[0172] Fig.15 A vibration device according to another embodiment of the present disclosure is illustrated.

[0173] Fig.16 It is along Fig.15 A cross-sectional view taken along line V-V' shown in FIG.

[0174] Fig.17 A device according to another embodiment of the present disclosure is illustrated.

[0175] Fig.18 Illustrated based on Fig.17 The thickness of the panels shown in the figure shows the amplitude of the panel displacement.

[0176] Fig.19 A vibration device according to another embodiment of the present disclosure is illustrated.

[0177] Fig. 20 It is along Fig.19 A cross-sectional view taken along line VI-VI' shown in FIG.

[0178] Fig.21 It is along Fig.19 Another cross-sectional view taken along line VI-VI' shown in FIG.

[0179] Fig. 22 A device according to another embodiment of the present disclosure is illustrated.

[0180] Fig.23 A device according to another embodiment of the present disclosure is illustrated.

[0181] Fig.24 A device according to another embodiment of the present disclosure is illustrated.

[0182] Fig.25 The sound output characteristics of each of the device according to the embodiment of the present disclosure and the device according to the experimental example are illustrated.

[0183] Throughout the drawings and detailed description, unless otherwise described, the same drawing reference numerals should be understood to refer to the same elements, features, and structures. The relative sizes and descriptions of these elements may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0184] Reference will now be made in detail to embodiments of the present disclosure, examples of which may be illustrated in the accompanying drawings. In the following description, when it is determined that a detailed description of a known function or configuration associated with this document unnecessarily obscures the main points of the inventive concept, its detailed description will be omitted. The described progress of processing steps and / or operations is an example; however, the order of steps and / or operations is not limited to the order set forth herein, and may be changed as known in the art, except that the steps and / or operations must occur in a specific order. Similar reference numerals always represent similar elements. The names of the corresponding elements used in the following description are selected only for ease of writing the specification, and therefore may be different from those used in the actual product.

[0185] The advantages and features of the present disclosure and methods for implementing the same will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be implemented in different forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0186] The shapes, sizes, proportions, angles and quantities disclosed in the drawings used to describe the embodiments of the present disclosure are merely examples, and therefore, the present disclosure is not limited to the illustrated details. Similar reference numerals refer to similar elements throughout. In the following description, when it is determined that the detailed description of the relevant known functions or configurations unnecessarily obscures the main points of the present disclosure, the detailed description will be omitted. When "including", "having" and "comprising" described in this specification are used, another component may be added unless "only" is used. Unless mentioned to the contrary, terms in the singular may include plural forms.

[0187] When explaining an element, the element is interpreted as including an error or tolerance range although there is no explicit description of such error or tolerance range.

[0188] When describing a positional relationship, for example, when the positional relationship between two components is described as, for example, "on," "above," "below," and "next to," one or more other components may be disposed between the two components, unless more restrictive terms such as "only" or "directly" are used.

[0189] When describing temporal relationships, for example, when a temporal order is described as, for example, "after," "following," "next," and "before," discontinuities may be included unless more restrictive terms such as "only," "immediately," or "directly" are used.

[0190] It will 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 only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0191] When describing the elements of the present disclosure, the terms "first", "second", "A", "B", "(a)", "(b)", etc. may be used. These terms are intended to identify the corresponding elements from other elements, and the basis, order or quantity of the corresponding elements should not be limited by these terms. Unless otherwise specified, the statement that an element is "connected", "coupled" or "adhered" to another element or layer means that the element or layer can be not only directly connected or adhered to another element or layer, but also indirectly connected or adhered to another element or layer, with one or more intermediate elements or layers "disposed" or "interposed" between the elements or layers.

[0192] The term "at least one" should be understood to include any and all combinations of one or more of the relevant listed items. For example, the meaning of "at least one of the first, second, and third items" means the combination of all items proposed from two or more of the first, second, and third items as well as the first, second, or third item.

[0193] In the present disclosure, examples of display devices may include narrow sense display devices including a display panel and a driver for driving the display panel, such as an organic light emitting display (OLED) module or a liquid crystal module (LCM). In addition, examples of display devices may include complete devices (or complete devices) or complete electronic devices such as notebook computers, TVs, computer monitors, equipment devices including automotive devices or another type of device for vehicles, or mobile electronic devices (such as smart phones or electronic tablets) as complete products (or final products) including LCM or OLED modules.

[0194] Therefore, in the present disclosure, examples of the display device may include a narrow-sense display device itself, such as an LCM or OLED module, and a complete device as a final consumer device or application product including the LCM or OLED module.

[0195] In some embodiments, an LCM or OLED module including a display panel and a driver may be referred to as a narrow display device, and an electronic device as a final product including the LCM or OLED module may be referred to as a complete set of equipment. For example, a narrow display device may include a display panel such as an LCD or an OLED, and a source printed circuit board (PCB) as a controller for driving the display panel. The complete set of equipment may also include a complete set of PCBs, which is a complete set of controllers electrically connected to the source PCB to control the complete set of equipment as a whole.

[0196] The display panel applied to the present embodiment may use all types of display panels such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, and an electroluminescent display panel, but the term is not limited to a specific display panel that is vibrated by the sound generating device according to the present embodiment to output sound. In addition, the shape or size of the display panel applied to the display device according to the present embodiment is not limited.

[0197] For example, when the display panel is a liquid crystal display panel, the display panel may include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively arranged in a plurality of pixel areas defined by the intersection of the gate lines and the data lines. In addition, the display panel may include: an array substrate including a thin film transistor (TFT) as a switching element for adjusting the transmittance of each of the plurality of pixels; an upper substrate including a color filter and / or a black matrix; and a liquid crystal layer between the array substrate and the upper substrate.

[0198] In addition, when the display panel is an organic light-emitting display panel, the display panel may include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively arranged in a plurality of pixel areas defined by the intersection of the gate lines and the data lines. In addition, the display panel may include: an array substrate including a TFT as an element for selectively applying a voltage to each pixel; an organic light-emitting device layer on the array substrate; and an encapsulation substrate arranged on the array substrate to cover the organic light-emitting device layer. The encapsulation substrate may protect the TFT and the organic light-emitting device layer from external impacts, and may prevent water or oxygen from penetrating into the organic light-emitting device layer. In addition, the layer arranged on the array substrate may include an inorganic light-emitting layer (e.g., a nano-sized material layer, quantum dots, etc.). As another embodiment of the present disclosure, the layer arranged on the array substrate may include a micro light-emitting diode.

[0199] The display panel may further include a backing attached to the display panel, such as a metal plate. However, the present embodiment is not limited to the metal plate, and the display panel may include another structure.

[0200] In some embodiments of the present disclosure, a device including a vibration device can be applied to a vehicle, such as a central control panel of a car, as a user interface module. For example, the device can be arranged between occupants sitting on two front seats so as to transmit the vibration of the display panel to the interior of the vehicle. Thus, the audio experience in the vehicle is improved compared to the case where the speaker is arranged on the inner side of the vehicle.

[0201] The features of the various embodiments of the present disclosure may be partially or generally connected or combined with each other, and may interoperate with each other in various ways and be technically driven, as can be fully understood by those skilled in the art. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0202] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. For ease of description, the scale of each element shown in the drawings is different from the actual scale, and is therefore not limited to the scale shown in the drawings.

[0203] Figure 1 illustrates a device according to an embodiment of the present disclosure, Figure 2 It is along Figure 1 A cross-sectional view taken along line II' illustrated in FIG.

[0204] Reference Figure 1 and Figure 2 , a device according to an embodiment of the present disclosure may include a display panel 100 for displaying an image and a vibration device 200 on a rear surface (or backside surface) of the display panel 100 to vibrate the display panel 100. The device according to the present disclosure may be a display device or an electronic device including the vibration device, but the embodiments of the present disclosure are not limited thereto.

[0205] The display panel 100 may display an electronic image or a digital image. For example, the display panel 100 may output light to display an image. The display panel 100 may be a curved display panel, or may be any type of display panel, such as a liquid crystal display panel, an organic light-emitting display panel, a quantum dot light-emitting display panel, a micro-light-emitting diode display panel, and an electrophoretic display panel. The display panel 100 may be a flexible display panel. For example, the display panel 100 may 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 the present disclosure are not limited thereto.

[0206] The display panel 100 according to an embodiment of the present disclosure may include a display area AA (or active area) for displaying an image according to driving of a plurality of pixels. The display panel 100 may also include a non-display area IA (or inactive area) completely or at least partially surrounding the display area AA, but the term is not limited thereto.

[0207] The display panel 100 according to an embodiment of the present disclosure may include an anode electrode, a cathode electrode, and a light-emitting device, and may be configured to display an image in a type such as a top emission type, a bottom emission type, or a double-sided emission type according to a structure of a pixel array layer including a plurality of pixels. In the top emission type, an image may be displayed by outputting visible light generated from the pixel array layer to a front region of a base substrate. In the bottom emission type, an image may be displayed by outputting visible light generated from the pixel array layer to a rear region of a base substrate.

[0208] The display panel 100 according to an embodiment of the present disclosure 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 a signal provided by a signal line. The signal line may include a gate line, a data line, a pixel driving power line, etc., but the embodiment of the present disclosure is not limited thereto.

[0209] Each of the multiple pixels may include a pixel circuit layer, which includes a driving thin film transistor (TFT) arranged at a pixel area formed by multiple gate lines and / or multiple data lines, an anode electrode electrically connected to the driving TFT, a light-emitting layer formed above the anode electrode, and a cathode electrode electrically connected to the light-emitting layer.

[0210] The driving TFT may be configured at a transistor region of each pixel region provided on the substrate. The driving TFT may include a gate electrode, a gate insulating layer, a semiconductor layer, a source electrode, and a drain electrode. The semiconductor layer of the driving TFT may include silicon such as amorphous silicon (a-Si), polycrystalline silicon (poly-Si), or low temperature polycrystalline silicon, or may include an oxide such as indium gallium zinc oxide (IGZO), but the embodiments of the present disclosure are not limited thereto.

[0211] The anode electrode may be disposed at an opening region provided at each pixel region and may be electrically connected to the driving TFT.

[0212] A light-emitting device according to an embodiment of the present disclosure may include an organic light-emitting device layer formed above an anode electrode. The organic light-emitting device layer may be implemented to emit light having the same color (e.g., white light) for each pixel, or may be implemented to emit light having different colors (e.g., red light, green light, or blue light) for each pixel. The cathode electrode (or common electrode) may be connected to the organic light-emitting device layer disposed in each pixel region in common. For example, the organic light-emitting device layer may have a stacked structure including a single structure or two or more structures containing the same color for each pixel. As another embodiment of the present disclosure, the organic light-emitting device layer may have a stacked structure including two or more structures containing one or more different colors for each pixel. The two or more structures including one or more different colors may be configured with one or more of blue, red, yellow-green, and green, or a combination thereof, but the embodiments of the present disclosure are not limited thereto. Examples of combinations may include blue and red, red and yellow-green, red and green, red / yellow-green / green, etc., but the embodiments of the present disclosure are not limited thereto. In addition, the present disclosure may be applied regardless of the stacking order thereof. The stacked structure including two or more structures having the same color or one or more different colors may further include a charge generation layer between the two or more structures. The charge generation layer may have a PN junction structure and may include an N-type charge generation layer and a P-type charge generation layer.

[0213] According to another embodiment of the present disclosure, the light emitting device may include a micro light emitting diode device electrically connected to each of the anode electrode and the cathode electrode. The micro light emitting diode device may be a light emitting diode implemented as an integrated circuit (IC) or a chip type. The micro light emitting diode device may include a first terminal electrically connected to the anode electrode and a second terminal electrically connected to the cathode electrode. The cathode electrode may be commonly connected to a second terminal of the micro light emitting diode device disposed in each pixel region.

[0214] The encapsulation portion may be formed on the substrate to surround the pixel array portion, thereby preventing oxygen or water from penetrating into the light-emitting device layer of the pixel array portion. The encapsulation portion according to the embodiment of the present disclosure may be formed as a multilayer structure in which organic material layers and inorganic material layers are alternately stacked, but the embodiment of the present disclosure is not limited thereto. The inorganic material layer may prevent oxygen or water from penetrating into the layer of the light-emitting device in the pixel array portion. The organic material layer may be formed to have a relatively thicker thickness than the inorganic material layer, thereby covering particles that appear in the manufacturing process. For example, the encapsulation portion may include a first inorganic layer, an organic layer on the first inorganic layer, and a second inorganic layer on the organic layer. The organic layer may be a particle covering layer, but the term is not limited thereto. The touch panel may be disposed on the encapsulation portion, or may be disposed on the rear surface of the pixel array portion or in the pixel array portion.

[0215] The display panel 100 according to an embodiment of the present 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 (or a display portion or a display area), which includes a plurality of pixels, which are respectively arranged in a plurality of pixel areas formed by the intersection 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 line and / or the data line, a pixel electrode connected to the TFT, and a common electrode disposed adjacent to the pixel electrode and provided with a common voltage.

[0216] The first substrate may further include a pad portion disposed at a first periphery (or a first non-display portion) and a gate driving circuit disposed at a second periphery (or a second non-display portion).

[0217] The pad portion may provide a signal provided from the outside to the pixel array portion and / or the gate drive circuit. For example, the pad portion may include a plurality of data pads connected to a plurality of data lines through a plurality of data link lines and / or a plurality of gate input pads connected to the gate drive circuit through a gate control signal line. For example, the size of the first substrate may be larger than the second substrate, but the embodiments of the present disclosure are not limited thereto.

[0218] The gate drive circuit according to an embodiment of the present disclosure may be embedded (or integrated) into the second peripheral portion of the first substrate to be connected to a plurality of gate lines. For example, the gate drive circuit may be implemented with a shift register including a transistor, which is formed by the same process as the TFT provided at the pixel region. The gate drive circuit according to another embodiment of the present disclosure may be implemented as an integrated circuit (IC) and may be provided at the panel drive circuit without being embedded in the first substrate.

[0219] The second substrate may be a lower substrate or a color filter array substrate. For example, the second substrate may include: a pixel pattern (or a pixel defining pattern) including an opening area overlapping a pixel area formed in the first substrate; and a color filter layer formed at the opening area. The size of the second substrate may be smaller than the first substrate, but the embodiments of the present disclosure are not limited thereto. For example, the second substrate may overlap with the remainder of the upper substrate except the first periphery. The second substrate may be attached to the remainder of the first substrate except the first periphery using a sealant, with a liquid crystal layer therebetween.

[0220] The liquid crystal layer may be disposed between the first substrate and the second substrate. The liquid crystal layer may include liquid crystals including liquid crystal molecules, wherein alignment directions of the liquid crystal molecules change based on an electric field generated by a common voltage and a data voltage applied to a pixel electrode of each pixel.

[0221] The second polarization member may be attached to the lower surface of the second substrate and may polarize light incident from the backlight and traveling to the liquid crystal layer. The first polarization member may be attached to the upper surface of the first substrate and may polarize light passing through the first substrate and output to the outside.

[0222] The display panel 100 according to an embodiment of the present disclosure may drive a liquid crystal layer based on an electric field generated in each pixel by a data voltage and a common voltage applied to each pixel, and thus may display an image based on light passing through the liquid crystal layer.

[0223] In the display panel 100 according to another embodiment of the present disclosure, the first substrate may be implemented as a color filter array substrate, and the second substrate may be implemented as a TFT array substrate. For example, the display panel 100 according to another embodiment of the present disclosure may have a type in which the upper and lower parts of the display panel 100 according to an embodiment of the present disclosure are reversed therebetween. For example, the pad portion of the display panel 100 according to another embodiment of the present disclosure may be covered by a separate mechanism or structure.

[0224] The display panel 100 according to an embodiment of the present disclosure may include a curved portion, and the curved portion may be bent or curved to have a curved shape or a specific radius of curvature.

[0225] The curved portion of the display panel 100 may be in at least one or more of one peripheral portion and another peripheral portion of the display panel 100 that are parallel to each other. One peripheral portion and / or another peripheral portion of the display panel 100 in which the curved portion is implemented may include only the non-display area IA, or may include the peripheral portion of the display area AA and the non-display area IA. The display panel 100 including the curved portion implemented by bending the non-display area IA may have a one-side frame bending structure or a two-side frame bending structure. In addition, the display panel 100 including the curved portion implemented by bending the peripheral portion of the display area AA and the non-display area IA may have a one-side active bending structure or a two-side active bending structure.

[0226] The vibration device 200 may vibrate the display panel 100 at the rear surface of the display panel 100, thereby providing sound and / or tactile feedback to the user (or viewer) based on the vibration of the display panel 100. The vibration device 200 may be implemented at the rear surface of the display panel 100 to directly vibrate the display panel 100.

[0227] As an embodiment of the present disclosure, the vibration device 200 may vibrate according to a voice signal synchronized with an image displayed by the display panel 100 to vibrate the display panel 100. As another embodiment of the present disclosure, the vibration device 200 may be disposed on the display panel 100, and may vibrate according to a tactile feedback signal (or haptic feedback signal) synchronized with a user's touch applied to a touch panel (or touch sensor layer) embedded in the display panel 100 to vibrate the display panel 100. Therefore, the display panel 100 may vibrate based on the vibration of the vibration device 200 to provide at least one of sound and tactile feedback to the user (or viewer).

[0228] The vibration device 200 according to the embodiment of the present disclosure can be implemented to have a size corresponding to the display area AA of the display panel 100. The size of the vibration device 200 can be 0.9 to 1.1 times the size of the display area AA, but the embodiment of the present disclosure is not limited thereto. For example, the size of the vibration device 200 can be equal to or less than the size of the display area AA. For example, the size of the vibration device 200 can be the same or substantially the same as the display area AA of the display panel 100, so the vibration device 200 can cover most of the area of ​​the display panel 100 and the vibration generated by the vibration device 200 can make the entire part of the display panel 100 vibrate, so the positioning of the sound can be higher, and the user's satisfaction can be improved. In addition, the contact area (or panel coverage) between the display panel 100 and the vibration device 200 can be increased, so the vibration area of ​​the display panel 100 can be increased, thereby improving the sound of the low-pitched vocal cords generated based on the vibration of the display panel 100. In addition, the vibration device 200 applied to the large-size display device can vibrate the entire display panel 100 with a large size (or a large area), so the positioning of the sound based on the vibration of the display panel 100 can be further enhanced, thereby achieving an improved sound effect. Therefore, the vibration device 200 according to the embodiment of the present disclosure can be arranged at the rear surface of the display panel 100 to fully vibrate the display panel 100 in the vertical (or front-to-back) direction, thereby outputting the desired sound to the front area in front of the display device. For example, the vibration device 200 is arranged at the rear surface of the display panel 100 to fully vibrate the display panel 100 in the vertical (or front-to-back) direction relative to the first direction (X) of the display panel, thereby outputting the desired sound to the front area in front of the display device.

[0229] The vibration device 200 according to an embodiment of the present disclosure may be implemented as a film type. Since the vibration device 200 may be implemented as a film type, it may have a thickness thinner than the display panel 100, and thus the thickness of the display device is not increased due to the arrangement of the vibration device 200. For example, the vibration device 200 may be referred to as a sound generating module, a sound generating device, a film actuator, a film type piezoelectric composite actuator, a film speaker, a film type piezoelectric speaker, or a film type piezoelectric composite speaker using the display panel 100 as a vibration plate, but the embodiments of the present disclosure are not limited thereto.

[0230] As another embodiment of the present disclosure, the vibration device 200 may not be arranged at the rear surface of the display panel 100 and may be applied to a vibrating object (or a vibrating member) instead of a display panel. For example, the vibrating object may be one or more of a non-display panel, wood, plastic, glass, cloth, vehicle interior material, vehicle glass window, building indoor ceiling, building glass window, aircraft interior material, aircraft glass window, etc., but the embodiments of the present disclosure are not limited thereto. For example, the non-display panel may be a light emitting diode lighting panel (or device), an organic light emitting lighting panel (or device), or an inorganic light emitting lighting panel (or device), but the embodiments of the present disclosure are not limited thereto. In this case, the vibrating object may be applied as a vibration plate, and the vibration device 200 may vibrate the vibrating object to output sound.

[0231] A vibration device including one vibration generator may have a problem that it cannot output enough sound. For example, when a vibration device including one vibration generator is applied to a display device such as a television (TV), there may be a problem that it is difficult to ensure enough sound. Therefore, when a vibration device implemented with two vibration generators arranged in parallel is applied to a display device, the attachment area of ​​the display panel 100 and the vibration device may be expanded, but because the attachment area is expanded, it may be difficult to attach the vibration device to the rear surface of the display panel 100 without bubbles. For example, when the display panel 100 may be a light-emitting display panel, there may be a problem that it is difficult to attach the vibration device to the packaging substrate without bubbles. In addition, in a vibration device implemented with two vibration generators arranged in parallel, because the vibrations of adjacent vibration generators are different, there may be a problem of differentiated vibrations that appear different vibrations. Due to this, there may be a problem that it is difficult to output a sound with enhanced sound flatness. There may be a problem that differentiated vibrations increase with the increase of the attachment area of ​​the vibration device. The vibration device 200 according to an embodiment of the present disclosure may include a plurality of vibration generators 210 and 230 overlapping each other. The vibration device 200 may include a plurality of vibration generators 210 and 230 overlapped or stacked to be displaced in the same direction. For example, the vibration device 200 may include a plurality of vibration generators 210 and 230 overlapped or stacked to have the same driving direction.

[0232] A plurality of vibration generators 210 and 230 may overlap or stack to displace (or drive or vibrate) in the same direction. For example, in a state where a plurality of vibration generators 210 and 230 overlap or stack, a plurality of vibration generators 210 and 230 may shrink or expand in the same driving direction (or displacement direction) based on a vibration drive signal, and therefore, the displacement (or bending force or flexure) or amplitude displacement of the display panel 100 may increase or may be maximized. Therefore, a plurality of vibration generators 210 and 230 may increase (or maximize) the displacement (or bending force or flexure) or amplitude displacement of the display panel 100, thereby enhancing the sound characteristics of the mid-bass tone vocal cords and the sound pressure level characteristics of the sound generated based on the vibration of the display panel 100. For example, the plurality of vibration generators 210 and 230 may be implemented so that the plurality of vibration generators 210 and 230 overlap or overlap to have the same driving direction, so that the driving force of each of the plurality of vibration generators 210 and 230 may be increased or may be maximized, thereby enhancing the sound characteristics of the low-mid pitch vocal cords and the sound pressure level characteristics of the sound generated by the display panel 100 based on the vibrations of the plurality of vibration generators 210 and 230. For example, the low-mid pitch vocal cord m may be 200Hz to 1kHz, but embodiments of the present disclosure are not limited thereto. For example, the high-pitched vocal cord may be 1kHz or higher or 3kHz or higher, but embodiments of the present disclosure are not limited thereto.

[0233] Each of the plurality of vibration generators 210 and 230 may include a piezoelectric structure (vibration part or piezoelectric vibration part) including a piezoelectric ceramic having piezoelectric properties, but the embodiments of the present disclosure are not limited thereto. For example, each of the plurality of vibration generators 210 and 230 may include a piezoelectric ceramic having a perovskite crystal structure, and thus may vibrate (or mechanically displace) in response to an electrical signal applied from the outside. For example, when a vibration drive signal (or voice signal) is applied, each of the plurality of vibration generators 210 and 230 may contract and expand alternately and repeatedly based on the inverse piezoelectric effect of the piezoelectric structure (vibration part or piezoelectric vibration part), and thus may be displaced (or vibrated or driven) in the same direction based on a bending phenomenon in which the bending direction alternately changes, thereby increasing or maximizing the amplitude displacement or displacement amount (or bending force or flexural force) of the vibration device 200 or / and the display panel 100.

[0234] The first vibration generator 210 disposed at the display panel 100 among the plurality of vibration generators 210 and 230 may be one main vibration generator. For example, the remaining second vibration generators 230 among the plurality of vibration generators 210 and 230 may be at least one auxiliary vibration generator stacked on the first vibration generator 210. The structure of the second vibration generator 230 may be the same as that of the first vibration generator 210, but the embodiments of the present disclosure are not limited thereto.

[0235] The vibration device 200 according to the embodiment of the present disclosure may further include an adhesive member 250 (or a first connection member) disposed between the plurality of vibration generators 210 and 230. The adhesive member 250 according to the embodiment of the present disclosure may be disposed between the plurality of vibration generators 210 and 230.

[0236] According to an embodiment of the present disclosure, the adhesive member 250 may include a material including an adhesive layer, which has good adhesive force or attachment force relative to each of the multiple vibration generators 210 and 230. For example, the adhesive member 250 may include a foam pad, a double-sided tape, an adhesive, etc., but the embodiment of the present disclosure is not limited thereto. For example, the adhesive layer of the adhesive member 250 may include epoxy resin, acrylic acid, silicone resin or polyurethane, but the embodiment of the present disclosure is not limited thereto. For example, the adhesive layer of the adhesive member 250 may include a polyurethane-based material, which has relatively ductile properties compared to acrylic acid among acrylic acid and polyurethane. Therefore, the vibration loss of the vibration device 200 caused by the displacement interference between the multiple vibration generators 210 and 230 can be minimized, or each of the multiple vibration generators 210 and 230 can be freely displaced.

[0237] According to another embodiment of the present disclosure, the bonding member 250 may include one or more of a heat-curing adhesive, a light-curing adhesive, and a thermal bonding adhesive. For example, the bonding member 250 may include a thermal bonding adhesive. The thermal bonding adhesive may be a heat-activated type or a thermally cured type. For example, the bonding member 250 including the thermal bonding adhesive may attach or couple two adjacent vibration generators 210 and 230 by heat and pressure.

[0238] The plurality of vibration generators 210 and 230 according to the embodiment of the present disclosure may be integrated into one structure (or element or component) through a lamination process using the bonding member 250. For example, the plurality of vibration generators 210 and 230 may be integrated into one structure through a lamination process using a roll.

[0239] A method of manufacturing the vibration device 200 according to an embodiment of the present disclosure will be described below.

[0240] First, the first vibration generator 210 of the plurality of vibration generators 210 and 230 may be disposed at a predetermined position of the stage, and the bonding member 250 may be aligned and placed on the first vibration generator 210 (a first loading / alignment process). For example, the first portion 210a of each vibration structure 211 of the first vibration generator 210 may be aligned or placed on a virtual extension line VL.

[0241] Subsequently, the second vibration generator 230 of the plurality of vibration generators 210 and 230 may be loaded onto the stage and may be aligned and placed on the first vibration generator 210 (second loading / alignment process). For example, the second vibration generator 230 may be aligned and placed on the first vibration generator 210 by aligning and placing the second portion (end, end, outer surface, or each peripheral portion) 230a of each vibration structure 211 of the second vibration generator 230 on the virtual extension line VL or the first portion 210a of each vibration structure 211 of the first vibration generator 210.

[0242] Subsequently, the first vibration generator 210 may be preliminarily bonded or coupled to the second vibration generator 230 (preliminary bonding process) by the adhesive member 250. For example, the preliminary bonding process may press at least one of the first vibration generator 210 and the second vibration generator 230 with a predetermined pressure. For example, the preliminary bonding process may be omitted.

[0243] Subsequently, the first vibration generator 210 and the second vibration generator 230 , which are preliminarily coupled or connected to each other, may be completely coupled or connected to each other (a main coupling process).

[0244] As an embodiment of the present disclosure, when the adhesive member 250 includes a photocurable adhesive, the primary bonding process may irradiate light onto the adhesive member 250 disposed between the first vibration generator 210 and the second vibration generator 230, and then, the first vibration generator 210 may be primarily bonded or coupled to the second vibration generator 230 through a photocuring process of curing the adhesive member 250. For example, the photocuring process may irradiate light onto the first vibration generator 210 and the second vibration generator 230 in a state where at least one of the first vibration generator 210 and the second vibration generator 230 is pressed with a certain pressure, but the embodiments of the present disclosure are not limited thereto.

[0245] As another embodiment of the present disclosure, when the bonding member 250 includes a thermal curing adhesive, the main bonding process may bond or couple the first vibration generator 210 to the second vibration generator 230 by applying heat to the bonding member 250 disposed between the first vibration generator 210 and the second vibration generator 230 to cure the thermal curing process of the bonding member 250. For example, the thermal curing process may apply heat to the first vibration generator 210 and the second vibration generator 230 in a state where at least one of the first vibration generator 210 and the second vibration generator 230 is pressed with a certain pressure, but the embodiments of the present disclosure are not limited thereto.

[0246] As another embodiment of the present disclosure, when the bonding member 250 includes a thermal bonding adhesive, the main bonding process can bond or connect the first vibration generator 210 to the second vibration generator 230 by applying predetermined heat and predetermined pressure to the bonding member 250 disposed between the first vibration generator 210 and the second vibration generator 230 to cure the bonding member 250 through a thermal curing process.

[0247] Subsequently, the plurality of vibration generators 210 and 230 integrated into one structure (or element) may be unloaded from the stage by the bonding member 250 .

[0248] The device according to an embodiment of the present disclosure may further include a connection member 150 (or a second connection member) disposed between the display panel 100 and the vibration device 200 .

[0249] The connection member 150 may be disposed between the display panel 100 and the vibration device 200, and thus the vibration device 200 may be connected or coupled to the rear surface of the display panel 100. For example, the vibration device 200 may be connected or coupled to the rear surface of the display panel 100 through the connection member 150, and thus may be supported by or disposed at the rear surface of the display panel 100.

[0250] The connection member 150 according to an embodiment of the present disclosure may include a material including an adhesive layer having good adhesion or attachment relative to each of the rear surface of the display panel 100 and the vibration device 200. For example, the connection member 150 may include a foam pad, a double-sided tape or an adhesive, but the embodiment of the present disclosure is not limited thereto. For example, the adhesive layer of the connection member 150 may include epoxy, acrylic, silicone or polyurethane, but the embodiment of the present disclosure is not limited thereto. For example, the adhesive layer of the connection member 150 may be different from the adhesive layer of the adhesive member 250. For example, the adhesive layer of the connection member 150 may include an acrylic-based material that is relatively better in terms of adhesion and hardness among acrylic and polyurethane. Therefore, the vibration of the vibration device 200 can be well transmitted to the display panel 100.

[0251] The adhesive layer of the connection member 150 may further include additives such as a tackifier or an adhesion enhancer, a wax component, an antioxidant, etc. The additives may prevent or reduce the connection member 150 from being detached (peeled off) from the display panel 100 due to the vibration of the vibration device 200. For example, the tackifier may be a rosin derivative, etc., and the wax component may be paraffin, etc. For example, the antioxidant may be a phenol-based antioxidant such as a thioester, but embodiments of the present disclosure are not limited thereto.

[0252] The connection member 150 according to another embodiment of the present disclosure may further include a hollow portion between the display panel 100 and the vibration device 200. The hollow portion of the connection member 150 may provide an air gap between the display panel 100 and the vibration device 200. Due to the air gap, sound waves (or sound pressure) based on the vibration of the vibration device 200 may not be dispersed by the connection member 150 and may be concentrated on the display panel 100. Therefore, the loss of vibration caused by the connection member 150 may be minimized, thereby increasing the sound pressure characteristics of the sound generated based on the vibration of the display panel 100.

[0253] The device according to an embodiment of the present disclosure may further include a support member 300 disposed at the rear surface of the display panel 100 .

[0254] The support member 300 may cover the rear surface of the display panel 100. For example, the support member 300 may cover the entire rear surface of the display panel 100 with a gap space GS therebetween. For example, the support member 300 may include at least one or more of a glass material, a metal material, and a plastic material. For example, the support member 300 may be a rear surface structure or a complete set of structures. For example, the support member 300 may be referred to as other terms such as a cover bottom, a plate bottom, a back cover, a base frame, a metal frame, a metal chassis, a chassis base, or an m-chassis. Therefore, the support member 300 may be implemented as any type of frame or plate-like structure disposed at the rear surface of the display panel 100.

[0255] The support member 300 according to an embodiment of the present disclosure may include a first support member 310 and a second support member 330 .

[0256] The first support member 310 may cover the rear surface of the display panel 100. For example, the first support member 310 may be a plate-shaped member covering the entire rear surface of the display panel 100. For example, the first support member 310 may be an inner plate including at least one or more of a glass material, a metal material, and a plastic material.

[0257] The first support member 310 may be spaced apart from the rearmost surface of the display panel 100 with a gap space GS therebetween. For example, the gap space GS may be referred to as an air gap, a vibration space, a sound resonance box, etc., but embodiments of the present disclosure are not limited thereto.

[0258] The second support member 330 may be disposed at the rear surface of the first support member 310. The second support member 330 may be a plate-shaped member covering the entire rear surface of the first support member 310. For example, the second support member 330 may include at least one or more of a glass material, a metal material, and a plastic material. For example, the second support member 330 may be referred to as an outer plate, a rear plate, a back plate, a back cover, or a back cover, but embodiments of the present disclosure are not limited thereto.

[0259] The supporting member 300 according to the embodiment of the present disclosure may further include a connecting member (or a third connecting member) 350 .

[0260] The connecting member 350 may be disposed between the first supporting member 310 and the second supporting member 330. For example, the first supporting member 310 and the second supporting member 330 may be coupled or connected to each other by the connecting member 350. For example, the connecting member 350 may be an adhesive resin, a double-sided tape, or a double-sided adhesive foam pad, but the embodiments of the present disclosure are not limited thereto. For example, the connecting member 350 may have elasticity for absorbing impact, but the embodiments of the present disclosure are not limited thereto. As an embodiment of the present disclosure, the connecting member 350 may be disposed in the entire area between the first supporting member 310 and the second supporting member 330. As another embodiment of the present disclosure, the connecting member 350 may be disposed between the first supporting member 310 and the second supporting member 330 in a grid structure including an air gap.

[0261] The apparatus according to an embodiment of the present disclosure may further include a middle frame 400 .

[0262] The middle frame 400 may be disposed between the rear peripheral portion of the display panel 100 and the front peripheral portion of the support member 300. The middle frame 400 may support at least one or more of the rear peripheral portion of the display panel 100 and the front peripheral portion of the support member 300, and may surround one or more side surfaces of each of the display panel 100 and the support member 300. The middle frame 400 may provide a gap space GS between the display panel 100 and the support member 300. The middle frame 400 may be referred to as a middle chassis, a middle cover, a middle frame, etc., but embodiments of the present disclosure are not limited thereto.

[0263] The middle frame 400 according to an embodiment of the present disclosure may include a first supporting portion 410 and a second supporting portion 430 .

[0264] The first supporting portion 410 may be disposed between the rear peripheral portion of the display panel 100 and the front peripheral portion of the supporting member 300, and thus a gap space GS may be provided between the display panel 100 and the supporting member 300. The front surface of the first supporting portion 410 may be coupled or connected to the rear peripheral portion of the display panel 100 through the first frame connecting member 401. The rear surface of the first supporting portion 410 may be coupled or connected to the front peripheral portion of the supporting member 300 through the second frame connecting member 403. For example, the first supporting portion 410 may have a single picture frame structure having a square shape or a frame structure having a plurality of separated strip shapes.

[0265] The second supporting portion 430 may be vertically coupled to the outer surface of the first supporting portion 410 in parallel with the thickness direction Z of the device. The second supporting portion 430 may surround one or more of the outer surface of the display panel 100 and the outer surface of the supporting member 300, thereby protecting the outer surface of each of the display panel 100 and the supporting member 300. The first supporting portion 410 may protrude from the inner surface of the second supporting portion 430 toward the gap space GS between the display panel 100 and the supporting member 300.

[0266] The apparatus according to the embodiment of the present disclosure may include a panel connection member instead of the middle frame 400 .

[0267] The panel connection member may be disposed between the rear peripheral portion of the display panel 100 and the front peripheral portion of the support member 300, and a gap space GS may be provided between the display panel 100 and the support member 300. The panel connection member may be disposed between the rear peripheral portion of the display panel 100 and the front peripheral portion of the support member 300 to adhere the display panel 100 and the support member 300. For example, the panel connection member may be a double-sided tape, a single-sided tape, or a double-sided adhesive foam pad, but embodiments of the present disclosure are not limited thereto. For example, the panel connection member may include epoxy resin, acrylic acid, silicone resin, or polyurethane, but embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the panel connection member may include a polyurethane-based material that is relatively ductile compared to acrylic acid among acrylic acid and polyurethane. Therefore, the vibration of the display panel 100 transmitted to the support member 300 may be minimized.

[0268] In the device according to the embodiment of the present disclosure, when the device includes a panel connection member instead of the middle frame 400, the support member 300 may include a curved side wall that is bent from the end (or end) of the second support member 330 and surrounds the outer surface (or outer side wall) of each of the first support member 310, the panel connection member, and the display panel 100. The curved side wall according to the embodiment of the present disclosure may have a single side wall structure or a curling structure. The curling structure may be a structure in which the end of any member is bent into a curved shape and overlaps each other or is spaced apart in parallel with each other. For example, in order to enhance the aesthetics of the design, the curved side wall may include a first curved side wall bent from one side of the second support member 330 and a second curved side wall bent from the first curved side wall to an area between the first curved side wall and the outer surface of the display panel 100. The second curved side wall may be spaced apart from the inner surface of the first curved side wall. Therefore, the second curved side wall may prevent the outer surface of the display panel 100 from contacting the inner surface of the first curved side wall or may prevent a lateral external impact from being transmitted to the outer surface of the display panel 100.

[0269] Figure 3 A vibration device according to an embodiment of the present disclosure is illustrated. Figure 4 It is along Figure 3 A cross-sectional view taken along line II-II' is shown.

[0270] Reference Figures 2 to 4 , the vibration device 200 according to the embodiment of the present disclosure may include a plurality of vibration generators 210 and 230 and an adhesive member 250 .

[0271] A plurality of vibration generators 210 and 230 may overlap or be stacked to displace (or drive or vibrate) in the same direction. For example, a plurality of vibration generators 210 and 230 may have substantially the same size, but embodiments of the present disclosure are not limited thereto. For example, a plurality of vibration generators 210 and 230 may have substantially the same size within the error range of the manufacturing process, but embodiments of the present disclosure are not limited thereto. Therefore, a plurality of vibration generators 210 and 230 may maximize the amplitude displacement of the vibration device 200 and / or the amplitude displacement of the display panel 100. One side (or end, or end, or outer surface, or each corner) 210a and 230a of each of the plurality of vibration generators 210 and 230 may be aligned on a virtual extension line VL extending in the thickness direction Z of the display panel 100, or may be arranged at a virtual extension line VL. For example, one side (or end, or tip, or outer surface, or each corner) 210 a and 230 a of each of the plurality of vibration generators 210 and 230 may be aligned in a direction perpendicular to the front surface of the display panel 100 .

[0272] For example, in at least one of the plurality of vibration generators 210 and 230, the displacement directions and amplitude displacements of the plurality of vibration generators 210 and 230 may not match, and thus the amplitude displacement of the vibration device 200 may not be maximized. For example, when at least one of the plurality of vibration generators 210 and 230 has different sizes that are out of the error range of the manufacturing process, the displacement directions and amplitude displacements of the plurality of vibration generators 210 and 230 may not match, and thus the amplitude displacement of the vibration device 200 may not be maximized. In addition, when at least one of the plurality of vibration generators 210 and 230 is displaced in different directions, the displacement directions of the plurality of vibration generators 210 and 230 may not match, and thus the amplitude displacement of the vibration device 200 may not be maximized.

[0273] The vibration device 200 according to the embodiment of the present disclosure may include two or more vibration generators 210 and 230 stacked to be displaced in the same direction. In the following description, an example in which the vibration device 200 includes the vibration generators 210 and 230 will be described.

[0274] According to an embodiment of the present disclosure, the first vibration generator 210 may be connected to or disposed on the rear surface of the display panel 100 through the connection member 150 (or the second connection member). The second vibration generator 230 may be disposed or attached to the first vibration generator 210 through the adhesive member 250 (or the first connection member).

[0275] The first vibration generator 210 and the second vibration generator 230 according to an embodiment of the present disclosure may each include a vibration structure 211 , a first protective member 213 , and a second protective member 215 .

[0276] The vibration structure 211 may include a piezoelectric material (or a piezoelectric element) having piezoelectric properties (or a piezoelectric effect). For example, a piezoelectric material may have the following properties: when pressure or distortion is applied to a crystal structure by an external force, a potential difference is generated due to dielectric polarization caused by a change in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated by an electric field based on a voltage applied thereto.

[0277] The vibration structure 211 according to an embodiment of the present disclosure may include a vibration portion 211a including a piezoelectric material, a first electrode portion 211b disposed at a first surface of the vibration portion 211a, and a second electrode portion 211c disposed at a second surface of the vibration portion 211a opposite to the first surface.

[0278] The vibration part 211a may include a piezoelectric material. The vibration part 211a may be referred to as a vibration layer, a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric vibration part, a piezoelectric material part, an electroactive part, an inorganic material layer or an inorganic material part, but the embodiments of the present disclosure are not limited thereto.

[0279] The vibration portion 211 a may be formed of a transparent, translucent, or opaque piezoelectric material, and the vibration portion 211 a may be transparent, translucent, or opaque.

[0280] The vibration part 211a may be configured as a ceramic-based material for generating relatively high vibrations, or may be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure may have a piezoelectric effect and an inverse piezoelectric effect, and may be a plate-like structure with orientation. The perovskite crystal structure may be represented by the chemical formula "ABO3". In the chemical formula, "A" may include a divalent metal element, and "B" may include a tetravalent metal element. As one embodiment of the present disclosure, in the chemical formula "ABO3", "A" and "B" may be cations, and "O" may be anions. For example, the chemical formula "ABO3" may include at least one or more of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTO3, but embodiments of the present disclosure are not limited thereto.

[0281] The vibration part 211 a according to an embodiment of the present disclosure may include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but the embodiment of the present disclosure is not limited thereto.

[0282] The vibration part 211a according to another embodiment of the present disclosure may include a lead zirconate titanate (PZT)-based material including lead (Pb), zirconium (Zr) and titanium (Ti), or may include a lead zirconate nickel niobate (PZNN)-based material including lead (Pb), zirconium (Zr), nickel (Ni) and niobium (Nb), but the embodiments of the present disclosure are not limited thereto. In addition, the vibration part 211a may include at least one or more of CaTiO3, BaTiO3 and SrTiO3 that do not contain Pb, but the embodiments of the present disclosure are not limited thereto.

[0283] According to another embodiment of the present disclosure, the vibration portion 211a may have a piezoelectric deformation coefficient "d 33 Therefore, the vibration device 200 may be applied to a display panel having a large size and may need to have a high voltage electric deformation coefficient "d 33 ” for having sufficient vibration characteristics or piezoelectric characteristics. For example, the vibration portion 211a may include a PZT-based material (PbZrTiO3) as a main component and may include a softener dopant material doped to the “A” position (Pb) and a relaxor ferroelectric material doped to the “B” position (ZrTi).

[0284] The softener dopant material may enhance the piezoelectric and dielectric properties of the vibration portion 211a, and, for example, may increase the piezoelectric deformation coefficient "d 33 ”. When the softener dopant material includes a monovalent element “+1”, the inventors have confirmed that the piezoelectric characteristics and the dielectric characteristics are reduced. For example, when the softener dopant material includes potassium (K) and rubidium (Rb), the piezoelectric characteristics and the dielectric characteristics may be reduced. Therefore, by conducting various experiments, the inventors have recognized that the softener dopant material should include a divalent element “+2” to a trivalent element “+3” to enhance the piezoelectric characteristics and the dielectric characteristics. The softener dopant material according to an embodiment of the present disclosure may include a divalent element “ +2" to trivalent elements "+3". A morphotropic phase boundary (MPB) can be achieved by adding a softener dopant material to the PZT-based material (PbZrTiO3), thereby enhancing the piezoelectric and dielectric properties. For example, the softener dopant material may include strontium (Sr), barium (Ba), lanthanum (La), neodymium (Nd), calcium (Ca), yttrium (Y), erbium (Er), or ytterbium (Yb). For example, the ions (Sr) of the softener dopant material doped into the PZT-based material (PbZrTiO3) 2+ , Ba 2+ ,La 2+ 、Nd 3+ , Ca 2+ , Y 3+ , Er 3+ , Yb3+ ) can replace a portion of lead (Pb) in the PZT-based material (PbZrTiO3), and its substitution rate can be 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 thus the electromechanical coupling coefficient "kP" and the piezoelectric deformation coefficient "d 33 " may be reduced. When the softener dopant material is replaced, an MPB can be formed, and the piezoelectric properties and dielectric properties in the MPB can be higher, thereby realizing a vibration device with high piezoelectric properties and high dielectric properties.

[0285] According to an embodiment of the present disclosure, the relaxor ferroelectric material doped into the PZT-based material (PbZrTiO3) can enhance the electric deformation characteristics of the vibration part 211a. The relaxor ferroelectric material according to the embodiment of the present disclosure may include a lead magnesium niobate (PMN)-based material or a lead nickel niobate (PNN)-based material, but the embodiment of the present disclosure is not limited thereto. The PMN-based material may include Pb, Mg and Nb, and may include Pb(Ni,Nb)O3, for example. For example, the relaxor ferroelectric material doped into the PZT-based material (PbZrTiO3) may replace a portion of each of zirconium (Zr) and titanium (Ti) in the PZT-based material (PbZrTiO3), and the replacement rate may be 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 destroyed, and thus the electromechanical coupling coefficient "kP" and the piezoelectric deformation coefficient "d33" may be reduced.

[0286] According to an embodiment of the present disclosure, the vibration portion 211a may further include a donor material doped into the "B" position (ZrTi) of the PZT-based material (PbZrTiO3) to further improve the piezoelectric coefficient. For example, the donor material doped into the "B" position (ZrTi) may include a tetravalent element "+4" or a hexavalent element "+6". For example, the donor material doped into the "B" position (ZrTi) may include tellurium (Te), germanium (Ge), uranium (U), bismuth (Bi), niobium (Nb), tantalum (Ta), antimony (Sb) or tungsten (W).

[0287] The vibration part 211 a according to the embodiment of the present disclosure may be expressed as the following Formula 1.

[0288] [Formula 1]

[0289] (Pb A-B C B )((Mg 1 / 3 Nb 2 / 3 ) a (Ni 1 / 3 Nb 2 / 3 ) bZr c Ti d )O3

[0290] Here, C may be one of Ca, Sr, and Ba. In addition, a+b+c+d=1, 0.02≤B≤0.20, 0.80≤AB≤0.98, 0.05≤a≤0.25, 0.05≤b≤0.25, 0.10≤c≤0.50, and 0.10≤d≤0.50.

[0291] The vibration portion 211a according to the embodiment of the present disclosure may have a piezoelectric deformation coefficient "d 33 ”, thereby realizing a vibration device with enhanced vibration characteristics. For example, a vibration device with enhanced vibration characteristics can be realized in a large area device.

[0292] The vibration part 211 a according to an embodiment of the present disclosure may be configured in a circular shape, an elliptical shape, or a polygonal shape, but the embodiment of the present disclosure is not limited thereto.

[0293] The first electrode portion 211b may be disposed at the first surface (or upper surface) of the vibration portion 211a. For example, the first electrode portion 211b may be electrically coupled or connected to the first surface of the vibration portion 211a. For example, the first electrode portion 211b may have a single electrode type disposed at the entire first surface of the vibration portion 211a. For example, the first electrode portion 211b may have the same shape as the vibration portion 211a, but the embodiments of the present disclosure are not limited thereto. The first electrode portion 211b according to the embodiments of the present disclosure may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or the semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the embodiments of the present disclosure are not limited thereto. The opaque conductive material may include aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), Mg, etc., or alloys thereof, but the embodiments of the present disclosure are not limited thereto.

[0294] The second electrode portion 211c may be disposed at a second surface (or rear surface) of the vibration portion 211a that is opposite to or different from the first surface. For example, the second electrode portion 211c may be electrically coupled or connected to the second surface of the vibration portion 211a. For example, the second electrode portion 211c may have a monomer electrode type disposed at the entire second surface of the vibration portion 211a. For example, the second electrode portion 211c may have the same shape as the vibration portion 211a, but the embodiments of the present disclosure are not limited thereto. The second electrode portion 211c according to the embodiments of the present disclosure may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the second electrode portion 211c may be formed of the same material as the first electrode portion 211b, but the embodiments of the present disclosure are not limited thereto. As another embodiment of the present disclosure, the second electrode portion 211c may be formed of a material different from the first electrode portion 211b.

[0295] In each of the first vibration generator 210 and the second vibration generator 230, the first electrode portion 211b may be disposed closer to the display panel 100 than the second electrode portion 211c, but the embodiments of the present disclosure are not limited thereto. For example, in the vibration device 200 including the plurality of vibration generators 210 and 230 according to the embodiments of the present disclosure, the first electrode portion 211b of each of the plurality of vibration generators 210 and 230 may be disposed closer to the display panel 100 than the second electrode portion 211c.

[0296] The vibration part 211a can be polarized by a specific voltage applied to the first electrode part 211b and the second electrode part 211c in a specific temperature atmosphere or a temperature atmosphere changed from high temperature to room temperature, but the embodiments of the present disclosure are not limited thereto. For example, the vibration part 211a can be alternately and repeatedly contracted and expanded based on the inverse piezoelectric effect according to a vibration driving signal (or sound signal or voice signal) applied from the outside to the first electrode part 211b and the second electrode part 211c, and thus can be displaced or vibrated.

[0297] The vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may have the same size as the vibration structure 211 (or vibration part 211a) of the second vibration generator 230. In order to maximize or increase the displacement amount or amplitude displacement of the vibration device 200, the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may substantially overlap or stack the vibration structure 211 (or vibration part 211a) of the second vibration generator 230 without interleaving. For example, the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may substantially overlap or stack the vibration structure 211 (or vibration part 211a) of the second vibration generator 230 without interleaving within the error range of the manufacturing process. For example, the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 and the vibration structure 211 (or vibration part 211a) of the second vibration generator 230 can be implemented as a stacked structure having the same size and not stacked in an interlaced manner, so the displacement amount or amplitude displacement of the vibration device 200 can be maximized or increased. For example, the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 and the vibration structure 211 (or vibration part 211a) of the second vibration generator 230 can be implemented as a stacked structure having the same size and not stacked in an interlaced manner, so the displacement amount or amplitude displacement of the vibration device 200 can be maximized or increased.

[0298] According to an embodiment of the present disclosure, the first part (or end, end, outer surface or each corner) 210a of each vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may be aligned on the virtual extension line VL, or may be arranged on the virtual extension line VL. For example, the first part (or end, end, outer surface or each corner) 210a of each vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may be accurately aligned on the virtual extension line VL, or may be accurately arranged on the virtual extension line VL. The second part (or end, end, outer surface or each corner) 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230 may be aligned on the virtual extension line VL, or may be arranged on the virtual extension line VL. For example, the second part (or end, end, outer surface or each corner) 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230 may be accurately aligned on the virtual extension line VL, or may be accurately arranged on the virtual extension line VL. The first part 210a of each vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may be aligned with or overlapped with the second part 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230. For example, the first part 210a of the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may be accurately aligned with or overlapped with the second part 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230. For example, the first part 210a of the vibration structure 211 (or the vibration part 211a) of the first vibration generator 210 may correspond to the second part 230a of each vibration structure 211 (or the vibration part 211a) of the second vibration generator 230. Therefore, in the vibration device 200 according to the embodiment of the present disclosure, the vibration structure 211 (or the first vibration structure) of the first vibration generator 210 and the vibration structure 211 (or the second vibration structure) of the second vibration generator 230 may be displaced in the same direction, and thus, the displacement amount or amplitude displacement of the vibration device 200 may be maximized or increased. Therefore, the displacement amount (or bending force or flexure force) or amplitude displacement of the display panel 100 may be increased (or maximized).

[0299] In the first vibration generator 210, the first protective member 213 may be disposed at the first electrode portion 211b. The first protective member 213 may protect the first electrode portion 211b. The second protective member 215 may be disposed at the second electrode portion 211c. The second protective member 215 may protect the second electrode portion 211c. For example, the first protective member 213 and the second protective member 215 of the first vibration generator 210 may be formed of a plastic material, a fiber material, or a wood material, but the embodiments of the present disclosure are not limited thereto. For example, in the first vibration generator 210, the first protective member 213 may be formed of the same or different material as the second protective member 215. Any one of the first protective member 213 and the second protective member 215 of the first vibration generator 210 may be connected or coupled to the display panel 100 by a connecting member (or a second connecting member) 150. For example, the first protective member 213 of the first vibration generator 210 may be connected or coupled to the display panel 100 by a connecting member (or a second connecting member) 150.

[0300] In the second vibration generator 230, the first protective member 213 may be disposed at the first electrode portion 211b. The first protective member 213 may protect the first electrode portion 211b. The second protective member 215 may be disposed at the second electrode portion 211c. The second protective member 215 may protect the second electrode portion 211c. For example, the first protective member 213 and the second protective member 215 of the second vibration generator 230 may be formed of a plastic material, a fiber material, or a wood material, but the embodiments of the present disclosure are not limited thereto. For example, in the second vibration generator 230, the first protective member 213 may be formed of the same or different material as the second protective member 215. One of the first protective member 213 and the second protective member 215 of the second vibration generator 230 may be connected or coupled to the first vibration generator 210 by an adhesive member (or a first connecting member) 250. For example, the first protective member 213 of the second vibration generator 230 may be connected or coupled to the second protective member 215 of the first vibration generator 210 by an adhesive member 250. In addition, the first vibration generator 210 and the second vibration generator 230 are symmetrical to each other with respect to the adhesive member 250, as shown in FIG. Figure 4 shown.

[0301] In each of the first vibration generator 210 and the second vibration generator 230 , each of the first protection member 213 and the second protection member 215 may be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but embodiments of the present disclosure are not limited thereto.

[0302] One or more of the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the present disclosure may further include a first adhesive layer 212 and a second adhesive layer 214 .

[0303] In the first vibration generator 210, the first adhesive layer 212 may be provided between the vibration structure 211 and the first protective member 213. For example, the first adhesive layer 212 may be provided between the first electrode portion 211b of the vibration structure 211 and the first protective member 213. The first protective member 213 may be provided at the first surface (or the first electrode portion 211b) of the vibration structure 211 through the first adhesive layer 212. For example, the first protective member 213 may be coupled or connected to the first surface (or the first electrode portion 211b) of the vibration structure 211 through a film lamination process using the first adhesive layer 212.

[0304] In the first vibration generator 210, the second adhesive layer 214 may be disposed between the vibration structure 211 and the second protective member 215. For example, the second adhesive layer 214 may be disposed between the second electrode portion 211c of the vibration structure 211 and the second protective member 215. The second protective member 215 may be disposed at the second surface (or the second electrode portion 211c) of the vibration structure 211 through the second adhesive layer 214. For example, the second protective member 215 may be coupled or connected to the second surface (or the second electrode portion 211c) of the vibration structure 211 through a film lamination process using the second adhesive layer 214.

[0305] In the first vibration generator 210, the first adhesive layer 212 and the second adhesive layer 214 may be connected or coupled to each other between the first protective member 213 and the second protective member 215. For example, in the first vibration generator 210, the first adhesive layer 212 and the second adhesive layer 214 may be connected or coupled to each other at the peripheral portion between the first protective member 213 and the second protective member 215. Therefore, in the first vibration generator 210, the vibration structure 211 may be surrounded by the first adhesive layer 212 and the second adhesive layer 214. For example, the first adhesive layer 212 and the second adhesive layer 214 may completely surround the entire vibration structure 211. For example, the first adhesive layer 212 and the second adhesive layer 214 may be referred to as a covering member, but the embodiments of the present disclosure are not limited thereto. When the first adhesive layer 212 and the second adhesive layer 214 are covering members, the first protective member 213 may be disposed at a first surface of the covering member, and the second protective member 215 may be disposed at a second surface of the covering member.

[0306] In the second vibration generator 230, the first adhesive layer 212 may be disposed between the vibration structure 211 and the first protective member 213. For example, the first adhesive layer 212 may be disposed between the first electrode portion 211b of the vibration structure 211 and the first protective member 213. The first protective member 213 may be disposed at the first surface (or the first electrode portion 211b) of the vibration structure 211 through the first adhesive layer 212. For example, the first protective member 213 may be coupled or connected to the first surface (or the first electrode portion 211b) of the vibration structure 211 through a film lamination process using the first adhesive layer 212.

[0307] In the second vibration generator 230, the second adhesive layer 214 may be disposed between the vibration structure 211 and the second protective member 215. For example, the second adhesive layer 214 may be disposed between the second electrode portion 211c of the vibration structure 211 and the second protective member 215. The second protective member 215 may be disposed at the second surface (or the second electrode portion 211c) of the vibration structure 211 through the second adhesive layer 214. For example, the second protective member 215 may be coupled or connected to the second surface (or the second electrode portion 211c) of the vibration structure 211 through a film lamination process using the second adhesive layer 214.

[0308] In the second vibration generator 230, the first adhesive layer 212 and the second adhesive layer 214 may be connected or coupled to each other between the first protective member 213 and the second protective member 215. For example, in the second vibration generator 230, the first adhesive layer 212 and the second adhesive layer 214 may be connected or coupled to each other at the peripheral portion between the first protective member 213 and the second protective member 215. Therefore, in the second vibration generator 230, the vibration structure 211 may be surrounded by the first adhesive layer 212 and the second adhesive layer 214. For example, the first adhesive layer 212 and the second adhesive layer 214 may completely surround the entire vibration structure 211. For example, the first adhesive layer 212 and the second adhesive layer 214 may be referred to as a covering member, but the embodiments of the present disclosure are not limited thereto. When the first adhesive layer 212 and the second adhesive layer 214 are covering members, the first protective member 213 may be disposed at a first surface of the covering member, and the second protective member 215 may be disposed at a second surface of the covering member.

[0309] In each of the first vibration generator 210 and the second vibration generator 230, each of the first adhesive layer 212 and the second adhesive layer 214 may include an electrically insulating material. For example, the electrically insulating material may have viscosity and may include a material that can be compressed and decompressed. For example, one or more of the first adhesive layer 212 and the second adhesive layer 214 may include epoxy resin, acrylic resin, silicone resin, or polyurethane resin, but embodiments of the present disclosure are not limited thereto.

[0310] One or more of the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the present disclosure may further include a first power line PL1 , a second power line PL2 , and a pad portion 217 .

[0311] The first power line PL1 of one or more of the first vibration generator 210 and the second vibration generator 230 may extend long in the second direction Y. The first power line PL1 may be disposed at the first protective member 213 and may be electrically connected to the first electrode portion 211b. For example, the first power line PL1 may be disposed at the rear surface of the first protective member 213 facing the first electrode portion 211b and may be electrically connected to the first electrode portion 211b. For example, the first power line PL1 may be disposed at the rear surface of the first protective member 213 directly facing the first electrode portion 211b and may be directly electrically connected to the first electrode portion 211b. For example, the first power line PL1 may be electrically connected to the first electrode portion 211b through an anisotropic conductive film. As another embodiment of the present disclosure, the first power line PL1 may be electrically connected to the first electrode portion 211b through a conductive material (or particles) included in the first adhesive layer 212.

[0312] For example, the first power lines PL1 of one or more of the first vibration generator 210 and the second vibration generator 230 may include at least one or more first power lines protruding along the first direction X intersecting the second direction Y. The at least one or more first power lines may extend long along the first direction X from at least one or more of one surface and the other surface of the first power line PL1 and may be electrically connected to the first electrode portion 211b. Therefore, the at least one or more first power lines may enhance the uniformity of the vibration driving signal applied to the first electrode portion 211b.

[0313] The second power line PL2 of one or more of the first vibration generator 210 and the second vibration generator 230 may be disposed at the second protective member 215 and may be electrically connected to the second electrode portion 211c. For example, the second power line PL2 may be disposed at the rear surface of the second protective member 215 facing the second electrode portion 211c and may be electrically connected to the second electrode portion 211c. For example, the second power line PL2 may be disposed at the rear surface of the second protective member 215 directly facing the second electrode portion 211c and may be directly electrically connected to the second electrode portion 211c. For example, the second power line PL2 may be electrically connected to the second electrode portion 211c through an anisotropic conductive film. As another embodiment of the present disclosure, the second power line PL2 may be electrically connected to the second electrode portion 211c through a conductive material (or particles) included in the second adhesive layer 214.

[0314] For example, the second power lines PL2 of one or more of the first vibration generator 210 and the second vibration generator 230 may include at least one or more second power lines protruding along the first direction X. The at least one or more second power lines may extend long along the first direction X from at least one or more of one surface and the other surface of the second power line PL2 and may be electrically connected to the second electrode portion 211c. The at least one or more second power lines may overlap or stack with the at least one or more first power lines. Therefore, the at least one or more second power lines may enhance the uniformity of the vibration drive signal applied to the second electrode portion 211c.

[0315] The pad portion 217 may be electrically connected to a portion (or one end or one side) of one or more of the first power line PL1 and the second power line PL2. For example, the pad portion 217 may be disposed at a first peripheral portion of one or more of the first protective member 213 and the second protective member 215. The pad portion 217 may be electrically connected to a portion (or one end or one side) of one or more of the first power line PL1 and the second power line PL2 at a first peripheral portion of one or more of the first protective member 213 and the second protective member 215.

[0316] The pad portion 217 according to an embodiment of the present disclosure may include a first pad electrode electrically connected to a portion (or one end or one side) of the first power line PL1 and a second pad electrode electrically connected to a portion (or one end or one side) of the second power line PL2. For example, one or more of the first pad electrode and the second pad electrode may be exposed at a first peripheral portion of one or more of the first protective member 213 and the second protective member 215.

[0317] One or more of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the present disclosure may further include a flexible cable 219 .

[0318] The flexible cable 219 may be electrically connected to the pad portion 217 of one or more of the first vibration generator 210 and the second vibration generator 230. Therefore, the flexible cable 219 may provide a vibration drive signal (or a sound signal) provided by the vibration drive circuit to the corresponding vibration structure 211. The flexible cable 219 according to an embodiment of the present disclosure may include a first terminal electrically connected to a first pad electrode of the pad portion 217 and a second terminal electrically connected to a second pad electrode of the pad portion 217. For example, the flexible cable 219 may be a flexible printed circuit cable or a flexible flat cable, but embodiments of the present disclosure are not limited thereto.

[0319] The vibration drive circuit (or sound processing circuit) may generate an alternating current (AC) vibration drive signal including a first vibration drive signal and a second vibration drive signal based on a sound source. The first vibration drive signal may be one of a positive (+) vibration drive signal and a negative (-) vibration drive signal, and the second vibration drive signal may be one of a positive (+) vibration drive signal and a negative (-) vibration drive signal. According to another embodiment of the present disclosure, the first vibration drive signal may be provided to the first electrode portion 211b of the vibration structure 211 through the first terminal of the flexible cable 219, the first pad electrode of the pad portion 217, and the first power line PL1. The second vibration drive signal may be provided to the second electrode portion 211c of the vibration structure 211 through the second terminal of the flexible cable 219, the second pad electrode of the pad portion 217, and the second power line PL2. As another embodiment of the present disclosure, the first vibration drive signal may be provided to the second electrode portion 211c of the vibration structure 211 through the first terminal of the flexible cable 219, the second pad electrode of the pad portion 217, and the second power line PL2. The second vibration driving signal may be provided to the first electrode portion 211 b of the vibration structure 211 through the second terminal of the flexible cable 219 , the first pad electrode of the pad part 217 , and the first power line PL1 .

[0320] The adhesive member 250 according to an embodiment of the present disclosure may be disposed between the first vibration generator 210 and the second vibration generator 230. For example, the adhesive member 250 may be disposed between the first protective member 213 of the first vibration generator 210 and the second protective member 215 of the second vibration generator 230. For example, the adhesive member 250 may include a material including an adhesive layer having good adhesive force or attachment force relative to the first vibration generator 210 and the second vibration generator 230. For example, the adhesive member 250 may include a foam pad, a double-sided tape, or an adhesive, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the adhesive member 250 may include epoxy resin, acrylic, silicone resin, or polyurethane, but the embodiments of the present disclosure are not limited thereto.

[0321] exist Figure 3 and Figure 4In the description thereof, the vibration device 200 according to the embodiment of the present disclosure has been described as including the first vibration generator 210 and the second vibration generator 230 and the bonding member 250 disposed between the first vibration generator 210 and the second vibration generator 230, but the embodiment of the present disclosure is not limited thereto. For example, based on the sound pressure level characteristics and output characteristics of the sound generated by the displacement of the display panel 100 based on the size and weight of the display panel 100, the vibration device 200 according to the embodiment of the present disclosure may include a plurality of (e.g., three or more) vibration generators 210 and 230 and the bonding member 250 disposed between the plurality of vibration generators 210 and 230. In this case, in order to maximize or increase the displacement amount or amplitude displacement of the vibration device 200, the plurality of vibration generators 210 and 230 may have the same size and may overlap or stack. For example, the first part 210a and the second part 230a (or the end, the end, the outer surface or each corner) of each vibration structure 211 (or the vibration part 221a) of one or more of the plurality of vibration generators 210 and 230 can be substantially overlapped or stacked without being staggered. For example, the first part 210a and the second part 230a (or the end, the end, the outer surface or each corner) of each vibration structure 211 (or the vibration part 221a) of one or more of the plurality of vibration generators 210 and 230 can be substantially overlapped or stacked without being staggered within the error range of the manufacturing process. For example, the first part 210a and the second part 230a (or the end, the end, the outer surface or each corner) of each vibration structure 211 (or the vibration part 221a) of each of the plurality of vibration generators 210 and 230 can be aligned on the virtual extension line VL, or can be arranged on the virtual extension line VL. For example, the first part 210a and the second part 230a (or the end, the end, the outer surface or each corner) of each vibration structure 211 (or the vibration part 221a) of each of the multiple vibration generators 210 and 230 can be accurately aligned on the virtual extension line VL, or can be accurately set on the virtual extension line VL.

[0322] Figure 5 A vibration driving circuit according to an embodiment of the present disclosure is illustrated. Figure 5 Example of connecting to Figure 3 The vibration driving circuit of the vibration device shown.

[0323] Reference Figures 3 to 5 The vibration driving circuit 500 according to an embodiment of the present disclosure may be electrically connected to the vibration device 200 and may generate a vibration driving signal based on a sound source to provide the vibration driving signal to the vibration device 200, thereby vibrating or displacing the vibration device 200.

[0324] The vibration driving circuit 500 according to an embodiment of the present disclosure may include a plurality of amplifiers 501 and 502 respectively connected to the plurality of vibration generators 210 and 230 constituting the vibration device 200. For example, the vibration driving circuit 500 may include a first amplifier 501 and a second amplifier 502 respectively connected to the first vibration generator 210 and the second vibration generator 230 constituting the vibration device 200.

[0325] The first amplifier 501 may generate an alternating current (AC) vibration driving signal including a first vibration driving signal and a second vibration driving signal based on a sound source.

[0326] The first amplifier 501 according to an embodiment of the present disclosure may include a first output terminal T11 outputting a first vibration driving signal and a second output terminal T12 outputting a second vibration driving signal.

[0327] In the first amplifier 501, the first output terminal T11 may be electrically connected to one of the first electrode portion 211b and the second electrode portion 211c of the first vibration generator 210. The second output terminal T12 may be electrically connected to the other of the first electrode portion 211b and the second electrode portion 211c of the first vibration generator 210. For example, the first output terminal T11 of the first amplifier 501 may be electrically connected to the first electrode portion 211b of the first vibration generator 210, and the second output terminal T12 of the first amplifier 501 may be electrically connected to the second electrode portion 211c of the first vibration generator 210. For example, the first vibration drive signal output from the first output terminal T11 of the first amplifier 501 may be provided to the first electrode portion 211b through the flexible cable 219, the pad portion 217, and the first power line PL1 of the first vibration generator 210. The second vibration drive signal output from the second output terminal T12 of the first amplifier 501 may be provided to the second electrode portion 211c through the flexible cable 219, the pad portion 217, and the second power line PL2 of the first vibration generator 210.

[0328] The second amplifier 502 according to an embodiment of the present disclosure may include a first output terminal T21 that outputs a first vibration driving signal and a second output terminal T22 that outputs a second vibration driving signal.

[0329] The first output terminal T21 and the second output terminal T22 of the second amplifier 502 may be connected to the first electrode portion 211b and the second electrode portion 211c of the second vibration generator 230, respectively, so that the second vibration generator 230 is displaced in the same direction as the displacement direction of the first vibration generator 210. In the second amplifier 502, the first output terminal T21 may be electrically connected to one of the first electrode portion 211b and the second electrode portion 211c of the second vibration generator 230, and the second output terminal T22 may be electrically connected to the other of the first electrode portion 211b and the second electrode portion 211c of the second vibration generator 230. For example, the first output terminal T21 of the second amplifier 502 may be electrically connected to the second electrode portion 211c of the second vibration generator 230, and the second output terminal T22 of the second amplifier 502 may be electrically connected to the first electrode portion 211b of the second vibration generator 230. For example, the first vibration drive signal output from the first output terminal T21 of the second amplifier 502 may be provided to the second electrode portion 211 c via the flexible cable 219, the pad portion 217, and the second power line PL2 of the second vibration generator 230. The second vibration drive signal output from the second output terminal T22 of the second amplifier 502 may be provided to the first electrode portion 211 b via the flexible cable 219, the pad portion 217, and the first power line PL1 of the second vibration generator 230.

[0330] exist Figure 5 In the description related thereto, the vibration drive circuit 500 according to the embodiment of the present disclosure has been described as including a first amplifier 501 and a second amplifier 502, but the embodiment of the present disclosure is not limited thereto. For example, the vibration drive circuit 500 according to the embodiment of the present disclosure may include a plurality of (e.g., three or more) amplifiers 501 and 502 corresponding to the number of vibration generators 210 and 230 included in the vibration device 200. Each of the three or more amplifiers 501 and 502 may provide a vibration drive signal for causing each of the three or more vibration generators 210 and 230 to shift in the same direction. According to an embodiment of the present disclosure, in order to cause each of the three or more vibration generators 210 and 230 to shift in the same direction, the three or more vibration generators 210 and 230 may include a first group and a second group, and the plurality of amplifiers 501 and 502 may include a first amplifier group and a second amplifier group.

[0331] The vibration generator 210 of the first group (e.g., the odd-numbered vibration generator) can be displaced by the vibration drive signal applied from the amplifier 501 of the first amplifier group (e.g., the odd-numbered amplifier), and the vibration generator 230 of the second group (e.g., the even-numbered vibration generator) can be displaced by the vibration drive signal applied from the amplifier 502 of the second amplifier group (e.g., the even-numbered amplifier), whereby three or more vibration generators 210 and 230 can be displaced in the same direction. For example, in the amplifier 501 of the first amplifier group, the first output terminal T11 can be electrically connected to the first electrode portion 211b of the vibration generator 210 of the first group, and the second output terminal T12 can be electrically connected to the second electrode portion 211c of the vibration generator 210 of the first group. In addition, in the amplifier 502 of the second amplifier group, the first output terminal T21 can be electrically connected to the second electrode portion 211c of the vibration generator 230 of the second group, and the second output terminal T22 can be electrically connected to the first electrode portion 211b of the vibration generator 230 of the second group.

[0332] Fig. 6A The displacement of the vibration generator according to the embodiment of the present disclosure is illustrated. Figure 6B The displacement of the vibration device according to the embodiment of the present disclosure is illustrated.

[0333] Reference Fig. 6A , the plurality of vibration generators 210 and 230 according to the embodiment of the present disclosure may be displaced (or vibrated) relative to the thickness direction Z of the display panel 100 based on the first amplitude DW1 according to the vibration driving signal. For example, the vibration portion 211a of each of the vibration generators 210 and 230 may include a first region (or a first polarization region) adjacent to the first electrode portion 211b and a second region (or a second polarization region) adjacent to the second electrode portion 211c. The vibration portion 211a may be displaced based on the first amplitude DW1 based on the expansion of the first region based on the positive (+) vibration driving signal and the contraction of the second region based on the negative (-) vibration driving signal. Therefore, the display panel 100 may be displaced (or vibrated) based on the second amplitude DW2 corresponding to the first amplitude DW1 based on the displacement of the vibration generators 210 and 230 having the first amplitude DW1.

[0334] Reference Figure 6B, the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the present disclosure may be displaced (or vibrated) relative to the thickness direction Z of the display panel 100 based on the third amplitude DW3 according to the vibration driving signal. The first vibration generator 210 and the second vibration generator 230 may be displaced (or vibrated) in the same direction based on the stacked structure in which the first vibration generator 210 and the second vibration generator 230 overlap each other, so the vibration device including the first vibration generator 210 and the second vibration generator 230 having the stacked structure may be displaced (or vibrated) based on a relatively larger amplitude than the vibration device including the vibration generator having a single structure. For example, the vibration portion 211a of each of the vibration generators 210 and 230 may include a first region (or a first polarization region) adjacent to the first electrode portion 211b and a second region (or a second polarization region) adjacent to the second electrode portion 211c. The vibration part 211a of the first vibration generator 210 can be displaced based on the third amplitude DW3 based on the expansion of the first region based on the positive (+) vibration drive signal and the contraction of the second region based on the negative (-) vibration drive signal, and at the same time, the vibration part 211a of the second vibration generator 230 can be displaced based on the fourth amplitude DW4 based on the contraction of the first region based on the negative (-) vibration drive signal and the expansion of the second region based on the positive (+) vibration drive signal. Therefore, the display panel 100 can be displaced (or vibrated) based on the fifth amplitude DW5 corresponding to the third amplitude DW3 of the first vibration generator 210 and the fourth amplitude DW4 of the second vibration generator 230, and thus can be vibrated based on a relatively larger amplitude than the vibration of the vibration device including the vibration generator having a single structure. For example, the driving direction of the vibration device 200 according to the embodiment of the present disclosure can match the driving direction of the vibration device including the vibration generator having a single structure, so the driving force of the vibration device 200 can be maximized or enhanced. Therefore, the displacement amount (or bending force or flexural force) or amplitude displacement of the display panel 100 can be increased (or maximized) by the displacement of the vibration device 200, thereby improving the sound characteristics of the mid-low pitch vocal cords and the sound pressure level characteristics of the sound generated based on the vibration of the display panel 100.

[0335] Figure 7 A vibration device according to another embodiment of the present disclosure is illustrated. Figure 8 For along Figure 7 A cross-sectional view taken along line III-III' is shown. Figure 8 Illustrated by Figure 3 Therefore, in the following description, repeated description of elements other than the second vibration generator and elements related thereto may be omitted or will be briefly given.

[0336] Reference Figure 7 and Figure 8 In the vibration device 200 according to another embodiment of the present disclosure, the second vibration generator 230 may include a vibration structure 211, a first protective member 213, and a second protective member 215. The second vibration generator 230 may be attached to the first vibration generator 210 in a vertically inverted type.

[0337] The second vibration generator 230 may be disposed at the rear surface of the first vibration generator 210 in a vertically inverted state by an adhesive member 250 (or a first connecting member) to have a stacked structure opposite to that of the first vibration generator 210 with respect to the rear surface of the display panel 100 .

[0338] According to an embodiment of the present disclosure, the first protective member 213 of the first vibration generator 210 may be connected or coupled to the rear surface of the display panel 100 by the connecting member 150 (or the second connecting member). In this case, the second protective member 215 of the second vibration generator 230 may be connected or coupled to the second protective member 215 of the first vibration generator 210 by the adhesive member 250. For example, in order for the first vibration generator 210 and the second vibration generator 230 to displace in the same direction at the same time, the first electrode portion 211b of the first vibration generator 210 may be disposed closer to the display panel 100 than the second electrode portion 211c, and the second electrode portion 211c of the second vibration generator 230 may be disposed closer to the display panel 100 than the first electrode portion 211b.

[0339] According to another embodiment of the present disclosure, the second protective member 215 of the first vibration generator 210 may be connected or coupled to the rear surface of the display panel 100 by the connecting member 150. In this case, the first protective member 213 of the second vibration generator 230 may be connected or coupled to the first protective member 213 of the first vibration generator 210 by the adhesive member 250. For example, in order to displace the first vibration generator 210 and the second vibration generator 230 in the same direction at the same time, the second electrode portion 211c of the first vibration generator 210 may be disposed closer to the display panel 100 than the first electrode portion 211b, and the first electrode portion 211b of the second vibration generator 230 may be disposed closer to the display panel 100 than the second electrode portion 211c.

[0340] Therefore, in the vibration device 200 according to another embodiment of the present disclosure, the second vibration generator 230 can be set at the first vibration generator 210 in a vertically inverted state, so when performing electrical connection with the vibration driving circuit, each of the first vibration generator 210 and the second vibration generator 230 can be electrically connected to the vibration driving circuit based on the same electrical connection type, even without changing the electrical connection structure between the second vibration generator 230 and the vibration driving circuit.

[0341] Fig. 9 A vibration driving circuit according to another embodiment of the present disclosure is illustrated. Fig. 9 Example of connecting to Figure 7 The vibration driving circuit of the vibration device shown.

[0342] Reference Figures 7 to 9 The vibration driving circuit 500 according to another embodiment of the present disclosure may be electrically connected to the vibration device 200 and may generate a vibration driving signal based on a sound source to provide the vibration driving signal to the vibration device 200, thereby vibrating or displacing the vibration device 200.

[0343] The vibration driving circuit 500 according to an embodiment of the present disclosure may include a plurality of amplifiers 501 and 502 respectively connected to the plurality of vibration generators 210 and 230 constituting the vibration device 200. For example, the vibration driving circuit 500 may include a first amplifier 501 and a second amplifier 502 respectively connected to the first vibration generator 210 and the second vibration generator 230 constituting the vibration device 200.

[0344] The first amplifier 501 may generate an AC vibration drive signal including a first vibration drive signal and a second vibration drive signal based on a sound source. The first amplifier 501 according to an embodiment of the present disclosure may include a first output terminal T11 outputting the first vibration drive signal and a second output terminal T12 outputting the second vibration drive signal. The first amplifier 501 may be similar to the above-mentioned Figure 5 The described first amplifier 501 is substantially the same, and thus repeated description thereof may be omitted.

[0345] The second amplifier 502 according to an embodiment of the present disclosure may include a first output terminal T21 that outputs a first vibration driving signal and a second output terminal T22 that outputs a second vibration driving signal.

[0346] The first output terminal T21 and the second output terminal T22 of the second amplifier 502 may be connected to the first electrode portion 211b and the second electrode portion 211c of the second vibration generator 230, respectively, so that the second vibration generator 230 is displaced in the same direction as the displacement direction of the first vibration generator 210. For example, the first output terminal T21 of the second amplifier 502 may be electrically connected to the first electrode portion 211b of the second vibration generator 230, and the second output terminal T22 of the second amplifier 502 may be electrically connected to the second electrode portion 211c of the second vibration generator 230. For example, the first vibration drive signal output from the first output terminal T21 of the second amplifier 502 may be provided to the first electrode portion 211b through the flexible cable 219, the pad portion 217, and the first power line PL1 of the second vibration generator 230. The second vibration drive signal output from the second output terminal T22 of the second amplifier 502 may be provided to the second electrode portion 211c through the flexible cable 219, the pad portion 217, and the second power line PL2 of the second vibration generator 230.

[0347] In the vibration driving circuit 500 according to another embodiment of the present disclosure, the second vibration generator 230 may be disposed or attached to the first vibration generator 210 in a vertically inverted type, and thus the second amplifier 502 may be electrically connected to the second vibration generator 230 without changing the positions of the first output terminal T21 and the second output terminal T22 of the second amplifier 502. For example, Figures 2 to 5 The second vibration generator 230 shown in FIG. 2 may be disposed or attached to the first vibration generator 210 without being vertically inverted, so in order to displace the three or more vibration generators 210 and 230 in the same direction, the second amplifier 502 may be electrically connected to the second vibration generator 230 in a state where the positions of the first output terminal T21 and the second output terminal T22 of the second amplifier 502 have been changed. For example, Figures 7 to 9The second vibration generator 230 shown can be arranged on or attached to the first vibration generator 210 in a vertically inverted state, so in order to displace three or more vibration generators 210 and 230 in the same direction, the positions of the first output terminal T21 and the second output terminal T22 of the second amplifier 502 may not need to be changed therebetween. Therefore, the type of electrical connection between the first output terminal T21 and the second output terminal T22 of the second amplifier 502 and the second vibration generator 230 can be the same as the type of electrical connection between the first output terminal T11 and the second output terminal T12 of the first amplifier 501 and the first vibration generator 210, so the ease of assembly between each of the first vibration generator 210 and the second vibration generator 230 and the first amplifier 501 and the second amplifier 502 can be increased or enhanced. For example, the first output terminal T11 of the first amplifier 501 can be electrically connected to the first electrode portion 211b of the first vibration generator 210, and the second output terminal T12 of the first amplifier 501 can be electrically connected to the second electrode portion 211c of the first vibration generator 210. Likewise, the first output terminal T21 of the second amplifier 502 may be electrically connected to the first electrode portion 211 b of the second vibration generator 230 , and the second output terminal T22 of the second amplifier 502 may be electrically connected to the second electrode portion 211 c of the second vibration generator 230 .

[0348] exist Figures 7 to 9 In the description thereof, the vibration device 200 according to another embodiment of the present disclosure has been described as including a first vibration generator 210 and a second vibration generator 230, but the embodiments of the present disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the present disclosure may include a plurality of (e.g., three or more) vibration generators 210 and 230. In order to displace each of the three or more vibration generators 210 and 230 in the same direction, the three or more vibration generators 210 and 230 may include a first group and a second group.

[0349] As an embodiment of the present disclosure, the vibration generators 210 of the first group (e.g., the odd-numbered vibration generators) may be displaced in a non-vertically inverted state, and the vibration generators 230 of the second group (e.g., the even-numbered vibration generators) may be displaced in a vertically inverted state. For example, the first electrode portion 211b of the vibration generator 210 of the first group may be disposed closer to the display panel 100 than the second electrode portion 211c, and the second electrode portion 211c of the vibration generator 230 of the second group may be disposed closer to the display panel 100 than the first electrode portion 211b.

[0350] As another embodiment of the present disclosure, the vibration generators 210 of the first group (e.g., the odd-numbered vibration generators) may be displaced in a vertically inverted state, and the vibration generators 230 of the second group (e.g., the even-numbered vibration generators) may be displaced in a non-vertically inverted state. For example, the second electrode portion 211c of the vibration generator 210 of the first group may be disposed closer to the display panel 100 than the first electrode portion 211b, and the first electrode portion 211b of the vibration generator 230 of the second group may be disposed closer to the display panel 100 than the second electrode portion 211c.

[0351] According to another embodiment of the present disclosure, the vibration drive circuit 500 may include a plurality of (e.g., three or more) amplifiers 501 and 502 corresponding to the number of the vibration generators 210 and 230 included in the vibration device 200. Each of the three or more amplifiers 501 and 502 may provide a vibration drive signal for causing each of the three or more vibration generators 210 and 230 to displace in the same direction. For example, the first electrode portion 211b of each of the three or more vibration generators 210 and 230 may be provided with a first vibration drive signal from the first output terminals T11 and T21 of the corresponding amplifiers 501 and 502 of the three or more amplifiers 501 and 502. The second electrode portion 211c of each of the three or more vibration generators 210 and 230 may be provided with a second vibration drive signal from the second output terminals T12 and T22 of the corresponding amplifiers 501 and 502 of the three or more amplifiers 501 and 502.

[0352] Fig.10 A vibration device according to another embodiment of the present disclosure is illustrated. Fig.11 Illustrated Fig.10 The vibration part illustrated in FIG. Fig.12 It is along Fig.10 The cross-sectional view taken along line IV-IV' is shown and illustrates the modified Figures 2 to 5 Vibration equipment as shown or Figures 7 to 9 Therefore, in the following description, repeated description of elements other than the vibration structure and elements related thereto may be omitted or will be briefly given.

[0353] Reference Figures 10 to 13 , in the vibration device 200 according to the embodiment of the present disclosure, the vibration structure 211 of each of the vibration generators 210 and 230 may include a vibration portion 211 a , a first electrode portion 211 b , and a second electrode portion 211 c .

[0354] The vibration part 211a may include a piezoelectric material, a composite piezoelectric material, or an electroactive material, and the piezoelectric material, the composite piezoelectric material, and the electroactive material may have a piezoelectric effect. The vibration part 211a may include an inorganic material and an organic material. For example, the vibration part 211a may include a plurality of inorganic material parts configured as a piezoelectric material and at least one organic material part configured as a flexible material. For example, the vibration part 211a may be referred to as a piezoelectric vibration part, a piezoelectric composite layer, a piezoelectric composite, or a piezoelectric ceramic composite, but the embodiments of the present disclosure are not limited thereto. The vibration part 211a may be formed of a transparent, translucent, or opaque piezoelectric material, and the vibration part 211a may be transparent, translucent, or opaque. Each of the vibration structure 211 including the vibration part 211a or the vibration generators 210 and 230 can be called a flexible vibration generator, a flexible actuator, a flexible speaker, a flexible piezoelectric speaker, a membrane actuator, a membrane-type piezoelectric composite actuator, a membrane speaker, a membrane-type piezoelectric speaker, a membrane-type piezoelectric composite speaker, etc., but the embodiments of the present disclosure are not limited thereto.

[0355] The vibration part 211a according to an embodiment of the present disclosure may include a plurality of first parts 211a1 and a plurality of second parts 211a2. For example, the plurality of first parts 211a1 and the plurality of second parts 211a2 may be arranged alternately and repeatedly in the first direction X (or the second direction Y). For example, the first direction X may be the width direction of the vibration part 211a, and the second direction Y may be the length direction of the vibration part 211a, but the embodiment of the present disclosure is not limited thereto. For example, the first direction X may be the length direction of the vibration part 211a, and the second direction Y may be the width direction of the vibration part 211a.

[0356] Each of the plurality of first portions 211a1 may be configured as an inorganic material portion. The inorganic material portion may include the above-mentioned piezoelectric material. For example, each of the plurality of first portions 211a1 may include the same Figure 3 and Figure 4 The vibration portion 211a is described as being substantially the same piezoelectric material, and thus their repeated description may be omitted.

[0357] Each of the plurality of first portions 211a1 according to an embodiment of the present disclosure may be disposed between the plurality of second portions 211a2. Each of the plurality of second portions 211a2 may be disposed (or arranged) in parallel with each other and the first portion 211a1 may be located therebetween. For example, the plurality of first portions 211a1 may have a first width W1 parallel to the first direction X (or the second direction Y) and a length parallel to the second direction Y (or the first direction X). Each of the plurality of second portions 211a2 may have a second width W2 parallel to the first direction X (or the second direction Y) and may have a length parallel to the second direction Y (or the first direction X). The first width W1 may be the same as or different from the second width W2. Each of the plurality of second portions 211a2 may have the same size, such as the same width, area or volume. For example, each of the plurality of second portions 211a2 may have the same size (e.g., the same width, area or volume) within a process error range (or allowable error) occurring in the manufacturing process. For example, the first width W1 may be greater than the second width W2. For example, the first portion 211a1 and the second portion 211a2 may include a line or a bar having the same size or different sizes. Therefore, the vibration portion 211a may include a 2-2 composite structure and may therefore have a resonant frequency of 20 kHz or less, but the embodiments of the present disclosure are not limited thereto. For example, the resonant frequency of the vibration portion 211a may vary based on at least one or more of a shape, a length, and a thickness.

[0358] In the vibration part 211a, a plurality of first parts 211a1 and a plurality of second parts 211a2 may be arranged (or arranged) in parallel on the same plane (or the same layer). Each of the plurality of second parts 211a2 may fill the gap between two adjacent first parts in the plurality of first parts 211a1. Each of the plurality of second parts 211a2 may be connected to or attached to a first part 211a1 adjacent thereto. For example, each of the plurality of second parts 211a2 may be configured to fill the gap between two adjacent first parts 211a1 and may be connected to or attached to an adjacent second part 211a2. Therefore, the vibration part 211a may extend a desired size or length based on the side connection (or connection) of the first part 211a1 and the second part 211a2.

[0359] In the vibration portion 211 a , a width (or size) W2 of each of the plurality of second portions 211 a 2 may gradually decrease in a direction from a central portion to two peripheral portions (or both ends) of the vibration portion 211 a .

[0360] According to an embodiment of the present disclosure, the second part 211a2 having the largest width W2 among the plurality of second parts 211a2 may be located at a portion where the highest stress may be concentrated when the vibration part 211a vibrates in the vertical (or up-and-down) direction Z (or thickness direction). The second part 211a2 having the smallest width W2 among the plurality of second parts 211a2 may be disposed at a portion where relatively low stress may occur when the vibration part 211a vibrates in the vertical direction Z. For example, the second part 211a2 having the largest width W2 among the plurality of second parts 211a2 may be disposed at a central portion of the vibration part 211a, and the second part 211a2 having the smallest width W2 among the plurality of second parts 211a2 may be disposed at one or more of the two peripheral portions of the vibration part 211a. Therefore, when the vibration part 211a vibrates in the vertical direction Z, interference of sound waves or overlap of resonance frequencies occurring in the portion where the highest stress is concentrated may be reduced or minimized. Therefore, the dip phenomenon of the sound pressure level occurring in the low-pitched vocal band can be reduced, thereby improving the flatness of the sound characteristics in the low-pitched vocal band. For example, the flatness of the sound characteristics can be the degree of deviation between the highest sound pressure level and the lowest sound pressure level.

[0361] In the vibration part 211a, each of the plurality of first parts 211a1 may have a different size (or width). For example, the size (or width) of each of the plurality of first parts 211a1 may be gradually reduced or increased in a direction from the central part of the vibration part 211a to the two peripheral parts (or both ends). In the vibration part 211a, based on various natural vibration frequencies according to the vibration of each of the plurality of first parts 211a1 having different sizes, the sound pressure level characteristics of the sound may be enhanced and the sound reproduction frequency band may be increased.

[0362] Each of the plurality of second parts 211a2 may be disposed between the plurality of first parts 211a1. Therefore, in the vibration part 211a, the vibration energy of the link in the unit cell of the first part 211a1 may be increased by the corresponding second part 211a2. Therefore, the vibration characteristics may be increased, and the piezoelectric characteristics and flexibility may be ensured. For example, the second part 211a2 may include one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but the embodiments of the present disclosure are not limited thereto.

[0363] The plurality of second parts 211a2 according to the embodiment of the present disclosure may be configured as organic material parts. For example, the organic material part may be disposed between the inorganic material parts and may absorb the impact applied to the inorganic material part (or the first part), may release the stress concentrated on the inorganic material part to enhance the overall durability of the vibration part 211a, and may provide flexibility to the vibration part 211a.

[0364] The plurality of second portions 211a2 according to an embodiment of the present disclosure may have a modulus and viscoelasticity lower than those of the first portion 211a1, and thus the second portions 211a2 may enhance the reliability of the first portion 211a1, which is easily affected by impact due to its fragile characteristics.

[0365] For example, when the vibration device 200 for vibrating the display panel 100 has impact resistance and high rigidity, the vibration device 200 may have high or maximum vibration characteristics. In order to make the vibration device 200 have impact resistance and high rigidity, each of the plurality of second parts 211a2 may include a material having a relatively high degree of damping factor (tan δ) and a relatively high rigidity. For example, each of the plurality of second parts 211a2 may include a material having a damping factor (tan δ) of about 0.1 [GPa] to about 1 [GPa] and a relatively high rigidity of about 0 [GPa] to about 10 [GPa]. In addition, the damping factor (tan δ) and the rigidity characteristics may be described based on the correlation between the loss factor and the modulus. For example, the second part 211a2 may include a material having a loss factor of about 0.01 to about 1.0 and a modulus of about 0.1 [GPa] to about 10 [GPa].

[0366] The organic material portion included in the second portion 211a2 may include one or more of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material having flexible characteristics compared to the inorganic material portion of the first portion 211a1. For example, the second portion 211a2 may be referred to as an adhesive portion, an elastic portion, a bending portion, a damping portion, or a flexible portion having flexibility, but the embodiments of the present disclosure are not limited thereto.

[0367] The organic material portion including the organic piezoelectric material can absorb the impact applied to the inorganic material portion (or the first portion 211a1). Therefore, the organic material portion can improve the overall durability of the vibration device 200, and can provide piezoelectric properties corresponding to a specific level or a higher level. The organic piezoelectric material according to an embodiment of the present disclosure may be an organic material. The organic piezoelectric material according to an embodiment of the present disclosure may be an organic material having electroactive properties. For example, the organic piezoelectric material may include at least one of polyvinylidene fluoride (PVDF), β-polyvinylidene fluoride (β-PVDF) and polytrivinylidene fluoride (PVDF-TrFE), but the embodiments of the present disclosure are not limited thereto.

[0368] The organic material portion including the organic non-piezoelectric material may include a curable resin compound and an adhesive including the curable resin compound. Therefore, the organic material portion can absorb the impact applied to the inorganic material portion (or the first portion), thereby enhancing the overall durability of the vibration device 200. The organic non-piezoelectric material according to an embodiment of the present disclosure may include at least one of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but the embodiments of the present disclosure are not limited thereto.

[0369] According to an embodiment of the present disclosure, the organic material portion including the organic non-piezoelectric material may include an adhesion promoter or adhesion enhancer for adhesion between the epoxy resin and the inorganic material portion for high stiffness characteristics of the vibration device 200. For example, the adhesion promoter may be a phosphate or the like, but the embodiments of the present disclosure are not limited thereto. The organic material portion may be cured by at least one of a thermal curing process and a photocuring process. In the process of curing the organic material portion, a solvent-free epoxy resin may be used to avoid or prevent the thickness uniformity of the vibration device 200 from being reduced due to shrinkage of the organic material portion caused by volatilization of the solvent.

[0370] The organic material portion including the organic non-piezoelectric material may further include a reinforcing agent, for example, for damping properties in addition to the high stiffness of the vibration device 200. For example, the reinforcing agent may be methyl methacrylate-butadiene-styrene (MBS) having a core-shell type, and its content may be about 5wt% to about 40wt%. The reinforcing agent may be an elastomer having a core-shell type, and may have a high coupling force with an epoxy resin such as an acrylic-based polymer. Therefore, the reinforcing agent may enhance the impact resistance or damping properties of the vibration device 200.

[0371] A plurality of first parts 211a1 and a second part 211a2 may be arranged on (or connected to) the same plane, and therefore, the vibration part 211a according to the embodiment of the present disclosure may have a single film type. For example, the vibration part 211a may have a structure in which a plurality of first parts 211a1 are connected to one side of the vibration part 211a. For example, a plurality of first parts 211a1 may have a structure connected to the entire vibration part 211a. For example, the vibration part 211a may vibrate in a vertical (or up and down) direction (or thickness direction) by the first part 211a1 having vibration characteristics, and may be bent into a curved surface shape by the second part 211a2 having flexibility. In addition, in the vibration part 211a according to the embodiment of the present disclosure, the size of the first part 211a1 and the size of the second part 211a2 may be adjusted based on the piezoelectric characteristics and flexibility required for the vibration part 211a. For example, when the vibration part 211a requires piezoelectric characteristics instead of flexibility, the size of the first part 211a1 may be adjusted to be larger than the size of the second part 211a2. As another embodiment of the present disclosure, when the vibration part 211a requires flexibility rather than piezoelectric characteristics, the size of the second part 211a2 can be adjusted to be larger than the first part 211a1. Therefore, the size of the vibration part 211a can be adjusted based on its required characteristics, and thus, the vibration part 211a can be easily designed.

[0372] In order to maximize or increase the displacement amount or amplitude displacement of the vibration device 200, the vibration structure 211 of the first vibration generator 210 and the vibration structure 211 of the second vibration generator 230 may have the same size and may overlap each other. For example, the first part (or end, end, outer surface or each corner) 210a of the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 may be substantially aligned or overlapped with the second part (or end, end, outer surface or each corner) 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230 without being staggered. For example, the first part (or end, end, outer surface or each corner) 210a of the vibration structure 211 (or vibration part 211a) of the first vibration generator 210 can be substantially aligned or overlapped with the second part (or end, end, outer surface or each corner) 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230 within the error range of the manufacturing process without being staggered. For example, the first part (or end, end, outer surface or each corner) 210a of each vibration structure 211 (or vibration part 211a) of the first vibration generator 210 can be aligned on the first virtual extension line VL1, or can be arranged on the first virtual extension line VL1. The second part (or end, end, outer surface or each corner) 230a of each vibration structure 211 (or vibration part 211a) of the second vibration generator 230 can be accurately aligned on the first virtual extension line VL1, or can be accurately arranged on the first virtual extension line VL1. The second portion (or end, terminal, outer surface or each corner) 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230 may be aligned on the first virtual extension line VL1, or may be disposed on the first virtual extension line VL1. The second portion (or end, terminal, outer surface or each corner) 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230 may be accurately aligned on the first virtual extension line VL1, or may be accurately disposed on the first virtual extension line VL1.

[0373] According to another embodiment of the present disclosure, the plurality of first parts 211a1 of the first vibration generator 210 and the plurality of first parts 211a1 of the second vibration generator 230 may have the same size as each other, and may be substantially overlapped or stacked without being staggered. For example, the plurality of first parts 211a1 of the first vibration generator 210 and the plurality of first parts 211a1 of the second vibration generator 230 may have the same size as each other, and may be substantially overlapped or stacked without being staggered within the error range of the manufacturing process. According to another embodiment of the present disclosure, the first part of the plurality of first parts 211a1 included in the first vibration generator 210 may be substantially overlapped or stacked with the first part of the plurality of first parts 211a1 included in the second vibration generator 230 without being staggered. For example, the first part of the plurality of first parts 211a1 included in the first vibration generator 210 may be substantially overlapped or stacked with the first part of the plurality of first parts 211a1 included in the second vibration generator 230 without being staggered within the error range of the manufacturing process. For example, a first portion of the plurality of first portions 211a1 included in the first vibration generator 210 and a first portion of the plurality of first portions 211a1 included in the second vibration generator 230 may be aligned or disposed on the second virtual extension line VL2 without interlacing. For example, a first portion of the plurality of first portions 211a1 included in the first vibration generator 210 and a first portion of the plurality of first portions 211a1 included in the second vibration generator 230 may be accurately aligned or accurately disposed on the second virtual extension line VL2 without interlacing within an error range of a manufacturing process.

[0374] According to another embodiment of the present disclosure, the plurality of second parts 211a2 of the first vibration generator 210 and the plurality of second parts 211a2 of the second vibration generator 230 may have the same size as each other, and may be substantially overlapped or stacked without interlacing. For example, the plurality of second parts 211a2 of the first vibration generator 210 and the plurality of second parts 211a2 of the second vibration generator 230 may have the same size as each other, and may be substantially overlapped or stacked without interlacing within the error range of the manufacturing process. According to another embodiment of the present disclosure, each of the plurality of second parts 211a2 of the first vibration generator 210 may be substantially overlapped or stacked with each of the plurality of second parts 211a2 of the second vibration generator 230 without interlacing. For example, each of the plurality of second parts 211a2 of the first vibration generator 210 and each of the plurality of second parts 211a2 of the second vibration generator 230 may be aligned or arranged on the second virtual extension line VL2 without interlacing. For example, the end (or end or part) of each of the plurality of second parts 211a2 included in the first vibration generator 210 and the end (or end or part) of each of the plurality of second parts 211a2 included in the second vibration generator 230 can be accurately aligned or accurately arranged on the second virtual extension line VL2 within the error range of the manufacturing process without being staggered. Therefore, in the vibration device 200 according to the embodiment of the present disclosure, the vibration part 211a of the first vibration generator 210 and the vibration part 211a of the second vibration generator 230 can be displaced in the same direction, and therefore, the displacement amount or amplitude displacement of the vibration device 200 can be maximized or increased. Therefore, the displacement amount (or bending force or flexure force) or amplitude displacement of the display panel 100 can be increased (or maximized).

[0375] The first electrode portion 211b may be disposed at the first surface (or upper surface) of the vibration portion 211a. For example, the first electrode portion 211b may be disposed together or coupled to the first surface of each of the plurality of first portions 211a1 and the first surface of each of the plurality of second portions 211a2. The first electrode portion 211b may be electrically connected to the first surface of each of the plurality of first portions 211a1. For example, the first electrode portion 211b may be disposed at the entire first surface of the vibration portion 211a. The first electrode portion 211b may have a single electrode type. For example, the first electrode portion 211b may have a shape substantially the same as the vibration portion 211a, but embodiments of the present disclosure are not limited thereto. The first electrode portion 211b according to an embodiment of the present disclosure may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material, but embodiments of the present disclosure are not limited thereto.

[0376] The second electrode portion 211c may be disposed at a second surface (or rear surface) of the vibration portion 211a that is opposite to or different from the first surface. The second electrode portion 211c may be disposed together or coupled to the second surface of each of the plurality of first portions 211a1 and the second surface of each of the plurality of second portions 211a2. The second electrode portion 211c may be electrically connected to the second surface of each of the plurality of first portions 211a1. For example, the second electrode portion 211c may be disposed at the entire second surface of the vibration portion 211a. The second electrode portion 211c may have a single electrode type. For example, the second electrode portion 211c may have a shape substantially the same as the vibration portion 211a, but embodiments of the present disclosure are not limited thereto. The second electrode portion 211c according to an embodiment of the present disclosure may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material, but embodiments of the present disclosure are not limited thereto.

[0377] The first electrode portion 211b may be covered by the above-mentioned first protective member 213. The second electrode portion 211c may be covered by the above-mentioned second protective member 215.

[0378] The vibration part 211a of each of the first vibration generator 210 and the second vibration generator 230 can be polarized (or polarized) by a specific voltage applied to the first electrode part 211b and the second electrode part 211c in a specific temperature atmosphere or in a temperature atmosphere changed from high temperature to room temperature, but the embodiments of the present disclosure are not limited thereto. For example, the vibration part 211a of each of the first vibration generator 210 and the second vibration generator 230 can be alternately and repeatedly contracted and expanded based on the inverse piezoelectric effect according to the vibration drive signal applied from the outside to the first electrode part 211b and the second electrode part 211c, and thus can vibrate. For example, the vibration part 211a of each of the first vibration generator 210 and the second vibration generator 230 can vibrate based on the vertical direction (or thickness direction Z) vibration d33 and the horizontal direction (or plane direction) vibration d31 according to the vibration drive signal applied to the first electrode part 211b and the second electrode part 211c. The vibration portion 211 a may increase the displacement of the vibration device 200 by contraction and expansion in the horizontal direction, thereby further improving the vibration of the vibration device 200 or the display panel.

[0379] exist Figures 10 to 12In the description thereof, the vibration device 200 according to another embodiment of the present disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but the embodiment of the present disclosure is not limited thereto. For example, the vibration device 200 according to another embodiment of the present disclosure may include a plurality of (e.g., three or more) vibration generators 210 and 230. In this case, in order to maximize or increase the displacement or amplitude displacement of the vibration device 200, the plurality of vibration generators 210 and 230 may have the same size and may overlap or stack. According to an embodiment of the present disclosure, the first part 211a1 of the vibration generator 210 disposed on the upper layer (or top layer) among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 disposed on the lower layer (or bottom layer) among the three or more vibration generators 230 may be substantially overlapped or stacked without interlacing. For example, the first part 211a1 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be substantially overlapped or stacked without being staggered within the error range of the manufacturing process. For example, the first part 211a1 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be aligned or disposed on the vertical extension line VL. For example, the first part 211a1 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be accurately aligned or accurately disposed on the vertical extension line VL. In addition, the second part 211a2 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be substantially overlapped or stacked without interlacing. For example, the second part 211a2 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be substantially overlapped or stacked without interlacing within the error range of the manufacturing process. For example, the second part 211a2 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be aligned on or disposed on the vertical extension line VL.For example, the second portion 211a2 of the vibration generator 210 disposed on an upper layer among three or more vibration generators 210 and 230 and the second portion 211a2 of the vibration generator 230 disposed on a lower layer among three or more vibration generators 230 may be accurately aligned or accurately disposed on the vertical extension line VL.

[0380] Fig.13 The vibration device according to another embodiment of the present disclosure is illustrated and the above reference is illustrated by modifying Figures 10 to 12 Therefore, in the following description, repeated description of elements other than the vibration part may be omitted or will be briefly given.

[0381] Reference Fig.13 In a vibration device 200 according to another embodiment of the present disclosure, a vibration part 211a of a vibration structure 211 included in each of the vibration generators 210 and 230 may include a plurality of first parts 211a1 and a second part 211a2 disposed between the plurality of first parts 211a1. The plurality of first parts 211a1 may be disposed to be spaced apart from each other along the first direction X and the second direction Y.

[0382] Each of the plurality of first portions 211a1 may be disposed to be spaced apart from each other along each of the first direction X and the second direction Y. For example, each of the plurality of first portions 211a1 may have a hexahedral shape (or a hexagonal object shape) of the same size and may be disposed in a lattice shape. Each of the plurality of first portions 211a1 may include the same Figure 3 and Figure 4 The vibration portion 211a described above and the Figures 10 to 12 The first portion 211 a 1 is described as having substantially the same piezoelectric material, and thus, like reference numerals refer to like elements and their repeated description may be omitted.

[0383] The second portion 211a2 may be disposed between the plurality of first portions 211a1 along each of the first direction X and the second direction Y. The second portion 211a2 may be configured to fill a gap or space between two adjacent first portions 211a1 or to surround each of the plurality of first portions 211a1, and thus may be connected or attached to the adjacent first portions 211a1. According to an embodiment of the present disclosure, the width of the second portion 211a2 disposed between two first portions 211a1 adjacent to each other along the first direction X may be the same as or different from that of the first portion 211a1, and the width of the second portion 211a2 disposed between two first portions 211a1 adjacent to each other along the second direction Y may be the same as or different from that of the first portion 211a1. For example, the second portion 211a2 may include the same as described above with reference to Figures 10 to 12 The second portion 211 a 2 is described as being made of substantially the same organic material, and thus like reference numerals refer to like elements and their repeated description may be omitted.

[0384] exist Fig.13In the description related thereto, the vibration device 200 according to another embodiment of the present disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but the embodiments of the present disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the present disclosure may include a plurality of (e.g., three or more) vibration generators 210 and 230. In this case, in order to maximize or increase the displacement or amplitude displacement of the vibration device 200, the plurality of vibration generators 210 and 230 may have the same size and may overlap or stack. According to an embodiment of the present disclosure, the first part 211a1 of the vibration generator 210 on the upper layer (or top layer) among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 on the lower layer (or bottom layer) among the three or more vibration generators 230 may be substantially overlapped or stacked without interlacing. For example, the first part 211a1 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be substantially overlapped or stacked without interlacing within the error range of the manufacturing process. In addition, the second part 211a2 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be substantially overlapped or stacked without interlacing. For example, the second part 211a2 of the vibration generator 210 disposed on the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed on the lower layer among the three or more vibration generators 230 can be substantially overlapped or stacked without interlacing within the error range of the manufacturing process.

[0385] Therefore, the vibration part 211a of each of the first vibration generator 210 and the second vibration generator 230 may include a 1-3 composite structure and thus may have a resonant frequency of 30MHz or less, but the embodiments of the present disclosure are not limited thereto. For example, the resonant frequency of the vibration part 211a may vary based on one or more of a shape, a length, and a thickness.

[0386] Fig.14 A vibration device according to another embodiment of the present disclosure is illustrated and a vibration device in which the Figures 10 to 12 Therefore, hereinafter, repeated description of elements other than the vibration part may be omitted or will be briefly given.

[0387] Reference Fig.14In a vibration device 200 according to another embodiment of the present disclosure, a vibration part 211a of a vibration structure 211 included in each of the vibration generators 210 and 230 may include a plurality of first parts 211a1 spaced apart from each other along a first direction X and a second direction Y and a second part 211a2 disposed between the plurality of first parts 211a1.

[0388] Each of the plurality of first portions 211a1 according to an embodiment of the present disclosure may have a circular flat structure. For example, each of the plurality of first portions 211a1 may have a circular plate shape, but the embodiment of the present disclosure is not limited thereto. For example, each of the plurality of first portions 211a1 may have a dot shape including an ellipse, a polygon, or a donut shape. Each of the plurality of first portions 211a1 may include the same Figures 10 to 12 The first portion 211 a 1 is described as being made of substantially the same piezoelectric material, and thus like reference numerals refer to like elements and their repeated description may be omitted.

[0389] The second portion 211a2 may be disposed between the plurality of first portions 211a1 along each of the first direction X and the second direction Y. The second portion 211a2 may be configured to surround each of the plurality of first portions 211a1 and thus may be connected to or attached to a side surface of each of the plurality of first portions 211a1. Each of the plurality of first portions 211a1 and the second portion 211a2 may be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 211a2 may include the same Figures 10 to 12 The second portion 211 a 2 is described as being made of substantially the same organic material, and thus like reference numerals refer to like elements and their repeated description may be omitted.

[0390] In the vibration part 211a of each of the vibration generators 210 and 230 according to another embodiment of the present disclosure, each of the plurality of first parts 211a1 may have a triangular flat structure instead of a circular flat structure. For example, each of the plurality of first parts 211a1 may have a triangular plate shape.

[0391] According to an embodiment of the present disclosure, four adjacent first portions 211a1 among the plurality of first portions 211a1 may be adjacent to each other to form a quadrangular or quadrilateral shape (or square). The vertices of the four adjacent first portions 211a1 forming the quadrangular shape may be adjacent to each other in the central portion (or central portion) of the quadrangular shape.

[0392] According to another embodiment of the present disclosure, six adjacent first portions 211a1 among the plurality of first portions 211a1 may be adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). The vertices of the six adjacent first portions 211a1 forming the hexagonal shape may be adjacent to each other in the central portion (or central portion) of the hexagonal shape.

[0393] exist Fig.14 In the description related thereto, the vibration device 200 according to another embodiment of the present disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but the embodiments of the present disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the present disclosure may include a plurality of (e.g., three or more) vibration generators 210 and 230. In this case, in order to maximize or increase the displacement or amplitude displacement of the vibration device 200, the plurality of vibration generators 210 and 230 may have the same size and may overlap or stack. According to an embodiment of the present disclosure, the first part 211a1 of the vibration generator 210 of the upper layer arranged in the middle of the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 of the lower layer arranged in the middle of the three or more vibration generators 210 and 230 may be substantially overlapped or stacked without interlacing. For example, the first part 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first part 211a1 of the vibration generator 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be substantially overlapped or stacked without interlacing within the error range of the manufacturing process. In addition, the second part 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be substantially overlapped or stacked without interlacing. For example, the second part 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second part 211a2 of the vibration generator 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be substantially overlapped or stacked without interlacing within the error range of the manufacturing process.

[0394] Therefore, the vibration part 211a of each of the first vibration generator 210 and the second vibration generator 230 may include a 1-3 compound and may be implemented as a circular vibration source (or vibrator), and thus may be enhanced in terms of vibration characteristics or sound output characteristics, and may have a resonance frequency of 30MHz or less, but the embodiments of the present disclosure are not limited thereto. For example, the resonance frequency of the vibration part 211a may vary based on one or more of a shape, a length, and a thickness.

[0395] Fig.15 A vibration device according to another embodiment of the present disclosure is illustrated. Fig.16 It is along Fig.15 The cross-sectional view taken along the line V-V' shown in FIG. Figures 10 to 12 An embodiment of the present disclosure of a vibration generator is shown.

[0396] Reference Fig.15 and Fig.16 In a vibration device according to another embodiment of the present disclosure, each of the first vibration generator 210 and the second vibration generator 230 may include at least one or more vibration generating parts 200A to 200D or a plurality of vibration generating parts 200A to 200D. Fig.15 and Fig.16 An example including four vibration generating parts is illustrated, but each of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the present disclosure may be configured to include two or more vibration generating parts, and the embodiment of the present disclosure is not limited thereto.

[0397] The plurality of vibration generating parts 200A to 200D may be electrically separated and disposed while being spaced apart from each other in each of the first direction X and the second direction Y.

[0398] Each of the plurality of vibration generating parts 200A to 200D can contract and expand alternately and / or repeatedly to vibrate based on the piezoelectric effect. Each of the plurality of vibration generating parts 200A to 200D can be arranged or tiled at specific intervals. Therefore, each of the first vibration generator 210 and the second vibration generator 230 in which the plurality of vibration generating parts 200A to 200D are tiled can be referred to as a vibration array, a vibration array portion, a vibration generating array portion, a vibration array structure, a tiled vibration array, a tiled vibration array module or a tiled vibration membrane, but the embodiments of the present disclosure are not limited thereto.

[0399] Each of the plurality of vibration generating parts 200A to 200D according to an embodiment of the present disclosure may have a quadrangular shape. For example, each of the plurality of vibration generating parts 200A to 200D may have a quadrangular shape having a width of about 5 cm or more. For example, each of the plurality of vibration generating parts 200A to 200D may have a square shape having a size of 5 cm×5 cm or more.

[0400] A plurality of vibration generating parts 200A to 200D may be arranged or tiled at a specific interval (or distance), and therefore, may be implemented as a vibration device (or a single vibration device or a vibration device) that is driven as a complete single body without independent driving. According to an embodiment of the present disclosure, with respect to the first direction X, the first separation distance D1 between the plurality of vibration generating parts 200A to 200D may be 0.1 mm or more and less than 3 cm, but the embodiment of the present disclosure is not limited thereto. In addition, with respect to the second direction Y, the second separation distance D2 between the plurality of vibration generating parts 200A to 200D may be 0.1 mm or more and less than 3 cm, but the embodiment of the present disclosure is not limited thereto. For example, the first separation distance D1 may be the same as the second separation distance D2. For example, the first separation distance D1 may be the same as the second separation distance D2 within the process error range.

[0401] According to an embodiment of the present disclosure, a plurality of vibration generating parts 200A to 200D may be arranged or tiled to have a separation distance (or interval) D1 and D2 of 0.1 mm or more and less than 3 cm, and thus may be driven as a vibration device, thereby increasing the reproduction frequency band and sound pressure level characteristics of the sound generated based on a single vibration of the plurality of vibration generating parts 200A to 200D. For example, a plurality of vibration generating parts 200A to 200D may be arranged at intervals of 0.1 mm or more and less than 5 mm, so as to increase the reproduction frequency band of the sound generated based on a single vibration of the plurality of vibration generating parts 200A to 200D and increase the sound of the low-pitched vocal band (e.g., a sound pressure level characteristic of 500 Hz or less).

[0402] According to an embodiment of the present disclosure, in a case where a plurality of vibration generating parts 200A to 200D are arranged with intervals (or distances) D1 and D2 less than 0.1 mm or without intervals (or distances) D1 and D2, the reliability of each of the vibration generating parts 200A to 200D or the first vibration generator 210 and the second vibration generator 230 may be reduced due to damage or breakage caused by physical contact therebetween, which occurs when each of the vibration generating parts 200A to 200D vibrates.

[0403] According to an embodiment of the present disclosure, when a plurality of vibration generating parts 200A to 200D are arranged at intervals (or distances) D1 and D2 of 3 cm or more, a plurality of vibration generating parts 200A to 200D may not be driven as a vibration device due to the independent vibration of each of the plurality of vibration generating parts 200A to 200D. Therefore, the reproduction frequency band and the sound pressure level characteristics of the sound generated based on the vibration of the plurality of vibration generating parts 200A to 200D can be reduced. For example, when a plurality of vibration generating parts 200A to 200D are arranged at intervals (or distances) D1 and D2 of 3 cm or more, the sound characteristics and the sound pressure level characteristics of the low-pitched vocal band (for example, 500 Hz or less) can be reduced separately.

[0404] According to an embodiment of the present disclosure, in a case where a plurality of vibration generating parts 200A to 200D are arranged at intervals of 5 mm, each of the plurality of vibration generating parts 200A to 200D may not be perfectly driven as a vibration device, and therefore, the sound characteristics and sound pressure level characteristics of a low-pitched vocal band (for example, 200 Hz or less) may each be reduced.

[0405] According to another embodiment of the present disclosure, in the case where a plurality of vibration generating parts 200A to 200D are arranged at intervals of 1 mm, each of the plurality of vibration generating parts 200A to 200D can be driven as a vibration device, and therefore, the reproduction frequency band of the sound may increase and the sound of the low-pitched vocal band (e.g., 500 Hz or less sound pressure level characteristics) may increase. For example, in the case where a plurality of vibration generating parts 200A to 200D are arranged at intervals of 1 mm, each of the first vibration generator 210 and the second vibration generator 230 can be implemented as an amplified large-area vibrator. Based on the optimization of the separation distance between the plurality of vibration generating parts 200A to 200D. Therefore, each of the first vibration generator 210 and the second vibration generator 230 can be driven as a large-area vibrator based on a single vibration of the plurality of vibration generating parts 200A to 200D, and therefore, the sound characteristics and the sound pressure level characteristics can each be increased in the reproduction frequency band and the low-pitched vocal band of the sound generated based on the large-area vibration of each of the first vibration generator 210 and the second vibration generator 230.

[0406] Therefore, in order to realize a single vibration (or a vibration device) of a plurality of vibration generating parts 200A to 200D, the separation distance between the plurality of vibration generating parts 200A to 200D can be adjusted to 0.1 mm or more and less than 3 cm. In addition, in order to realize a single vibration (or a vibration device) of a plurality of vibration generating parts 200A to 200D and increase the sound pressure level characteristics of the sound of the low-pitched vocal band, the separation distance between the plurality of vibration generating parts 200A to 200D can be adjusted to 0.1 mm or more and less than 5 mm.

[0407] Each of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the present disclosure may include first to fourth vibration generating parts 200A to 200D that are electrically disconnected from each other and disposed spaced apart from each other in each of the first direction X and the second direction Y. For example, the first to fourth vibration generating parts 200A to 200D may be arranged or tiled in a 2×2 form.

[0408] According to an embodiment of the present disclosure, the first vibration generating part 200A and the second vibration generating part 200B may be spaced apart from each other in the first direction X. The third vibration generating part 200C and the fourth vibration generating part 200D may be spaced apart from each other in the first direction X and may be spaced apart from each of the first vibration generating part 200A and the second vibration generating part 200B in the second direction Y. The first vibration generating part 200A and the third vibration generating part 200C may be spaced apart from each other in the second direction Y to face each other. The second vibration generating part 200B and the fourth vibration generating part 200D may be spaced apart from each other in the second direction Y to face each other.

[0409] Each of the first to fourth vibration generating parts 200A to 200D according to the embodiment of the present disclosure may include a vibration part 211 a , a first electrode part 211 b , and a second electrode part 211 c .

[0410] The vibration part 211a may include a ceramic-based material capable of achieving relatively high vibration. For example, the vibration part 211a may include a 1-3 composite structure having a piezoelectric characteristic of a 1-3 vibration mode or a 2-2 composite structure having a piezoelectric characteristic of a 2-2 vibration mode. For example, the vibration part 211a may include a ceramic-based material similar to that described above with reference to Figure 3 The piezoelectric ceramic of the vibration portion 211a described above may be similar to that of the piezoelectric ceramic of the vibration portion 211a described above. Figures 10 to 14 The vibration portion 211 a described in any one of the embodiments includes a first portion 211 a 1 and a second portion 211 a 2 , and thus like reference numerals refer to like elements and their repeated descriptions may be omitted.

[0411] According to an embodiment of the present disclosure, the vibration part 211 a may be formed of a transparent, translucent, or opaque piezoelectric body, and the vibration part 211 a may be transparent, translucent, or opaque.

[0412] The first electrode portion 211b may be disposed at the first surface of the vibration portion 211a and may be electrically connected to the first surface of the vibration portion 211a. For example, the first electrode portion 211b may be connected to the first surface of the vibration portion 211a. Figures 2 to 14 The first electrode portion 211 b described in any one of the embodiments is substantially the same, and thus like reference numerals refer to like elements, and their repeated description may be omitted.

[0413] The second electrode portion 211c may be disposed at the second surface of the vibration portion 211a and may be electrically connected to the second surface of the vibration portion 211a. For example, the second electrode portion 211c may be connected to the second surface of the vibration portion 211a. Figures 2 to 14 The second electrode portion 211 c described in any one of the embodiments is substantially the same, and thus like reference numerals refer to like elements, and their repeated description may be omitted.

[0414] Each of the first vibration generator 210 and the second vibration generator 230 according to another embodiment of the present disclosure may further include a first protective member 1213 and a second protective member 1215 .

[0415] The first protective member 1213 may be disposed on the first surface of each of the first vibration generator 210 and the second vibration generator 230. For example, the first protective member 1213 may cover the first electrode portion 211b disposed on the first surface of each of the plurality of vibration generating parts 200A to 200D. Therefore, the first protective member 1213 may be commonly connected to the first surface of each of the plurality of vibration generating parts 200A to 200D or may commonly support the first surface of each of the plurality of vibration generating parts 200A to 200D. Therefore, the first protective member 1213 may protect the first surface or the first electrode portion 211b of each of the plurality of vibration generating parts 200A to 200D.

[0416] The first protective member 1213 according to an embodiment of the present disclosure may be disposed at the first surface of each of the plurality of vibration generating parts 200A to 200D through the first adhesive layer 1212. For example, the first protective member 1213 may be disposed at the first surface of each of the plurality of vibration generating parts 200A to 200D through a film lamination process using the first adhesive layer 1212. For example, the first protective member 1213 may be disposed directly at the first surface of each of the plurality of vibration generating parts 200A to 200D through a film lamination process using the first adhesive layer 1212. Therefore, the plurality of vibration generating parts 200A to 200D may be integrated (or disposed) with the first protective member 1213 or tiled to have certain intervals D1 and D2.

[0417] The second protective member 1215 may be disposed on the second surface of each of the first vibration generator 210 and the second vibration generator 230. For example, the second protective member 1215 may cover the second electrode portion 211c disposed on the second surface of each of the plurality of vibration generating parts 200A to 200D, and thus may be commonly connected to the second surface of each of the plurality of vibration generating parts 200A to 200D, or may commonly support the second surface of each of the plurality of vibration generating parts 200A to 200D. Therefore, the second protective member 1215 may protect the second surface or the second electrode portion 211c of each of the plurality of vibration generating parts 200A to 200D.

[0418] The second protective member 1215 according to the embodiment of the present disclosure may be disposed at the second surface of each of the plurality of vibration generating parts 200A to 200D through the second adhesive layer 1214. For example, the second protective member 1215 may be disposed at the second surface of each of the plurality of vibration generating parts 200A to 200D through a film lamination process using the second adhesive layer 1214. For example, the second protective member 1215 may be disposed directly at the second surface of each of the plurality of vibration generating parts 200A to 200D through a film lamination process using the second adhesive layer 1214. Therefore, the plurality of vibration generating parts 200A to 200D may be integrated (or disposed) with the second protective member 1215 or tiled to have certain intervals D1 and D2.

[0419] Each of the first protective member 1213 and the second protective member 1215 according to an embodiment of the present disclosure may be formed of a plastic material, a fiber material, or a wood material, but the embodiment of the present disclosure is not limited thereto. Any one of the first protective member 1213 and the second protective member 1215 may be attached to or coupled to the display panel 100 by a connecting member (or a second connecting member).

[0420] The first adhesive layer 1212 may be disposed between the first surfaces of each of the plurality of vibration generating parts 200A to 200D and between the plurality of vibration generating parts 200A to 200D. For example, the first adhesive layer 1212 may be formed at a rear surface (or inner surface) of the first protective member 1213 facing the first surface of each of the first vibration generator 210 and the second vibration generator 230. For example, the first adhesive layer 1212 may be disposed at the first surface of each of the plurality of vibration generating parts 200A to 200D and filled between the plurality of vibration generating parts 200A to 200D.

[0421] The second adhesive layer 1214 may be disposed between the second surfaces of each of the plurality of vibration generating parts 200A to 200D and between the plurality of vibration generating parts 200A to 200D. For example, the second adhesive layer 1214 may be formed at the front surface (or inner surface) of the second protective member 1215 facing the second surface of each of the first vibration generator 210 and the second vibration generator 230. For example, the second adhesive layer 1214 may be disposed at the second surface of each of the plurality of vibration generating parts 200A to 200D and filled between the plurality of vibration generating parts 200A to 200D.

[0422] The first adhesive layer 1212 and the second adhesive layer 1214 may be connected to each other between the plurality of vibration generating parts 200A to 200D. Therefore, each of the plurality of vibration generating parts 200A to 200D may be surrounded by the first adhesive layer 1212 and the second adhesive layer 1214. For example, the first adhesive layer 1212 and the second adhesive layer 1214 may completely surround all of the plurality of vibration generating parts 200A to 200D. For example, the first adhesive layer 1212 and the second adhesive layer 1214 may be referred to as a covering member, but embodiments of the present disclosure are not limited thereto. When each of the first adhesive layer 1212 and the second adhesive layer 1214 is a covering member, the first protective member 1213 may be disposed at the first surface of the covering member and the second protective member 1215 may be disposed at the second surface of the covering member.

[0423] Each of the first adhesive layer 1212 and the second adhesive layer 1214 according to an embodiment of the present disclosure may include an electrically insulating material having adhesiveness and may include a material capable of compression and decompression. For example, each of the first adhesive layer 1212 and the second adhesive layer 1214 may include epoxy resin, acrylic resin, silicone resin or polyurethane resin, but the embodiment of the present disclosure is not limited thereto. For example, each of the first adhesive layer 1212 and the second adhesive layer 1214 may be configured to be transparent, translucent or opaque.

[0424] Each of the first and second vibration generators 210 and 230 according to another embodiment of the present disclosure may further include a first power line PL1 disposed at the first protective member 1213 , a second power line PL2 disposed at the second protective member 1215 , and a pad portion 1217 electrically connected to the first and second power lines PL1 and PL2 .

[0425] The first power line PL1 may be disposed at a rear surface of the first surface of the first protective member 1213 facing each of the first vibration generator 210 and the second vibration generator 230. The first power line PL1 may be electrically connected to the first electrode portion 211b of each of the plurality of vibration generating parts 200A to 200D. For example, the first power line PL1 may be directly electrically connected to the first electrode portion 211b of each of the plurality of vibration generating parts 200A to 200D. For example, the first power line PL1 may be electrically connected to the first electrode portion 211b of each of the plurality of vibration generating parts 200A to 200D through an anisotropic conductive film. As another embodiment of the present disclosure, the first power line PL1 may be electrically connected to the first electrode portion 211b of each of the plurality of vibration generating parts 200A to 200D through a conductive material (or particles) contained in the first adhesive layer 1212.

[0426] The first power line PL1 according to an embodiment of the present disclosure may include a 1-1 power line PL11 and a 1-2 power line PL12 arranged along the second direction Y. For example, the 1-1 power line PL11 may be electrically connected to the first electrode portion 211b of each of the first vibration generating part 200A and the third vibration generating part 200C (or the first group or the first array group) among the plurality of vibration generating parts 200A to 200D. For example, the first vibration generating part 200A and the third vibration generating part 200C may be arranged at the first column parallel to the second direction Y among the plurality of vibration generating parts 200A to 200D. The 1-2 power line PL12 may be electrically connected to the first electrode portion 211b of each of the second vibration generating part 200B and the fourth vibration generating part 200D (or the second group or the second array group) among the plurality of vibration generating parts 200A to 200D. For example, the second vibration generating portion 200B and the fourth vibration generating portion 200D may be arranged at a second column parallel to the second direction Y among the plurality of vibration generating portions 200A to 200D.

[0427] The second power line PL2 may be disposed at a front surface of the second surface of the second protective member 1215 facing each of the first vibration generator 210 and the second vibration generator 230. The second power line PL2 may be electrically connected to the second electrode portion 211c of each of the plurality of vibration generating parts 200A to 200D. For example, the second power line PL2 may be directly electrically connected to the second electrode portion 211c of each of the plurality of vibration generating parts 200A to 200D. For example, the second power line PL2 may be electrically connected to the second electrode portion 211c of each of the plurality of vibration generating parts 200A to 200D through an anisotropic conductive film. As another embodiment of the present disclosure, the second power line PL2 may be electrically connected to the second electrode portion 211c of each of the plurality of vibration generating parts 200A to 200D through a conductive material (or particles) contained in the second adhesive layer 1214.

[0428] The second power line PL2 according to an embodiment of the present disclosure may include a 2-1st power line PL21 and a 2-2nd power line PL22 arranged along the second direction Y. For example, the 2-1st power line PL21 may be electrically connected to the second electrode portion 211c of each of the first vibration generating part 200A and the third vibration generating part 200C (or the first group or the first array group) among the plurality of vibration generating parts 200A to 200D. For example, the first vibration generating part 200A and the third vibration generating part 200C may be arranged at the first column parallel to the second direction Y among the plurality of vibration generating parts 200A to 200D. The 2-2nd power line PL22 may be electrically connected to the second electrode portion 211c of each of the second vibration generating part 200B and the fourth vibration generating part 200D (or the second group or the second array group) among the plurality of vibration generating parts 200A to 200D. For example, the second vibration generating portion 200B and the fourth vibration generating portion 200D may be arranged at a second column parallel to the second direction Y among the plurality of vibration generating portions 200A to 200D.

[0429] The pad portion 1217 may be provided at each of the first vibration generator 210 and the second vibration generator 230 to be electrically connected to a portion (or one end) of at least one or more of the first power line PL1 and the second power line PL2. The pad portion 1217 according to an embodiment of the present disclosure may include a first pad electrode electrically connected to a portion of the first power line PL1 and a second pad electrode electrically connected to a portion of the second power line PL2.

[0430] The first pad electrode may be commonly connected to a portion (or one end) of each of the 1-1 power line PL11 and the 1-2 power line PL12 of the first power line PL1. For example, a portion (or one end) of each of the 1-1 power line PL11 and the 1-2 power line PL12 may branch from the first pad electrode.

[0431] The second pad electrode may be commonly connected to a portion (or one end) of each of the 2-1st power line PL21 and the 2-2nd power line PL22 of the second power line PL2. For example, a portion (or one end) of each of the 2-1st power line PL21 and the 2-2nd power line PL22 may branch from the second pad electrode.

[0432] According to an embodiment of the present disclosure, each of the first power line PL1, the second power line PL2, and the pad portion 1217 may be configured as a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material so as to be transparent, semi-transparent, or opaque.

[0433] Each of the first vibration generator 210 and the second vibration generator 230 according to another embodiment of the present disclosure may further include a flexible cable 1219 .

[0434] The flexible cable 1219 may be electrically connected to the pad portion 1217 provided at each of the first vibration generator 210 and the second vibration generator 230, and may provide one or more vibration drive signals (or sound signals) provided from the vibration drive circuit to each of the first vibration generator 210 and the second vibration generator 230. The flexible cable 1219 according to an embodiment of the present disclosure may include a first terminal electrically connected to a first pad electrode of the pad portion 1217 and a second terminal electrically connected to a second pad electrode of the pad portion 1217. For example, the flexible cable 1219 may be a flexible printed circuit cable or a flexible flat cable, but embodiments of the present disclosure are not limited thereto.

[0435] Therefore, the vibration device 200 according to another embodiment of the present disclosure may include a plurality of vibration generating parts 200A to 200D, which are implemented as a single vibrator and are not independently driven, and therefore, can be driven as a large-area vibrator based on the monomer vibration of the plurality of vibration generating parts 200A to 200D. For example, the plurality of vibration generating parts 200A to 200D can be a single vibrator arranged (or tiled) at specific intervals D1 and D2. Therefore, the vibration device 200 can vibrate a large area of ​​the display panel or a large area of ​​itself, thereby increasing or enhancing the sound characteristics and sound pressure level characteristics in the reproduction frequency band of the sound output from the display panel and the low-pitched vocal band.

[0436] Fig.17An apparatus according to another embodiment of the present disclosure is illustrated and is along the Figure 1 A cross-sectional view taken along line II' is shown. Fig.17 An embodiment of the present disclosure is illustrated, wherein the plate is further configured in Figures 2 to 16 in the device shown.

[0437] Reference Fig.17 , the device according to another embodiment of the present disclosure may include a display panel 100 to display an image, and a vibration device 200 to vibrate the display panel 100 on a rear surface (or backside surface). The device according to another embodiment of the present disclosure may further include a plate 170 disposed between the display panel 100 and the vibration device 200.

[0438] Each of the display panel 100 and the vibration device 200 may be the same as that described above with reference to Figures 2 to 16 Each of the described display panel 100 and the vibration device 200 is substantially the same, and thus, repeated descriptions thereof may be omitted or will be briefly given.

[0439] The board 170 may have the same shape and size as the rear surface of the display panel 100, or may have the same shape and size as the vibration device 200. As another embodiment of the present disclosure, the board 170 may have a size different from that of the display panel 100. For example, the board 170 may be smaller than the size of the display panel 100. As another embodiment of the present disclosure, the board 170 may have a size different from that of the vibration device 200. For example, the board 170 may be larger than or smaller than the size of the vibration device 200. The vibration device 200 may be equal to or smaller than the size of the display panel 100.

[0440] The plate 170 according to an embodiment of the present disclosure may include a metal material. For example, the plate 170 may include one or more materials of stainless steel, aluminum (Al), magnesium (Mg), magnesium (Mg) alloy, magnesium-lithium (Mg-Li) alloy, and Al alloy, but the embodiment of the present disclosure is not limited thereto.

[0441] The plate 170 may include a plurality of opening portions. The plurality of opening portions may be configured to have a predetermined size and a predetermined interval (or distance). For example, the plurality of opening portions may be arranged along the first direction X and the second direction Y to have a predetermined size and a predetermined interval. Due to the plurality of opening portions, the sound waves (or sound pressure) based on the vibration of the vibration device 200 may not be dispersed by the plate 170 and may be concentrated on the display panel 100. Therefore, the vibration loss caused by the plate 170 may be minimized, thereby increasing the sound pressure characteristics of the sound generated based on the vibration of the display panel 100. For example, the plate 170 including a plurality of openings may have a grid shape. For example, the plate 170 including a plurality of openings may be a grid plate.

[0442] According to an embodiment of the present disclosure, the plate 170 can strengthen the mass of the vibration device 200, which is arranged at the rear surface of the display panel 100 or suspended at the rear surface of the display panel 100. Therefore, the plate 170 can reduce the resonant frequency of the display panel 100 based on the increase in the mass of the vibration device 200. Therefore, the plate 170 can increase the sound characteristics and sound pressure level characteristics of the low-pitched vocal band generated based on the vibration of the vibration device 200 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 sound pressure level and the lowest sound pressure level. For example, the plate 170 can be referred to as a weight member, a mass member, a sound flattening member, etc., but embodiments of the present disclosure are not limited thereto.

[0443] According to an embodiment of the present disclosure, the displacement amount (or bending force or flexure force) or amplitude displacement (or vibration width) of the display panel 100 in which the plate 170 is provided can be reduced as the thickness of the plate 170 increases based on the rigidity of the plate 170. Therefore, the sound characteristics and sound pressure level characteristics of the low-pitched vocal range of the sound generated based on the displacement (or vibration) of the display panel 100 can be reduced.

[0444] According to an embodiment of the present disclosure, the displacement amount of the display panel 100 may be affected by the contact area between the vibration device 200 and the plate 170 in addition to the thickness of the plate 170. For example, Fig.18 As shown in FIG. 1 , when the same force is applied based on the thickness of the plate 170, the displacement amount of the display panel 100 may increase as the contact area between the vibration device 200 and the plate 170 or the attachment area of ​​the vibration device 200 gradually decreases. For example, when the thickness of the plate 170 is 0.25 mm, the displacement amount of the vibration device 200 having the first size ( Fig.18 The amplitude displacement (or displacement amount) of the display panel 100 based on the vibration device 200 ( Fig.18The amount of displacement of the display panel 100 of the displacement of the display panel 100 is determined by the displacement of the display panel 100 of the first embodiment (dashed line). Therefore, the vibration device 200 according to the embodiment of the present disclosure may include a plurality of vibration generators 210 and 230 having a first size and overlapping each other, thereby minimizing the reduction of the amount of displacement of the display panel 100 caused by the thickness of the plate 170. In addition, the vibration device 200 according to the embodiment of the present disclosure may include a plurality of vibration generators 210 and 230 having a first size and overlapping each other, so that the amount of displacement of the display panel 100 can be increased or maximized, thereby increasing or enhancing the sound characteristics and sound pressure level characteristics of the low-pitched vocal band of the sound generated based on the displacement of the display panel 100. Therefore, in the device according to another embodiment of the present disclosure, the vibration device 200 can increase or maximize the amount of displacement of the display panel 100 in which the plate 170 is disposed based on the stacked structure of the overlapping vibration generators 210 and 230. The plate 170 may have a thickness that enables the heat of the display panel 100 to be smoothly dissipated. For example, the plate 170 may have a thickness of 0.1 mm to 0.75 mm, but the embodiments of the present disclosure are not limited thereto.

[0445] The board 170 according to an embodiment of the present disclosure may be coupled or connected to the rear surface of the display panel 100 by a board connection member (or a fourth connection member) 190 .

[0446] The board connection member 190 may include a material including an adhesive layer having good adhesive force or attachment force relative to the rear surface of the vibration device 200 and the display panel 100, respectively. For example, the board connection member 190 may include a foam pad, a double-sided tape, or an adhesive, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the board connection member 190 may include epoxy, acrylic, silicone, or polyurethane, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the board connection member 190 may be the same as the adhesive layer of the connection member 150, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the board connection member 190 may include an acrylic-based material that is relatively better than polyurethane in terms of adhesive force and hardness, so that the vibration of the vibration device 200 can be well sent to the display panel 100. For example, the adhesive layer of the board connection member 190 may be different from the adhesive layer of the connection member 150.

[0447] The vibration device 200 may be connected or coupled to the rear surface of the plate 170 through the above-mentioned connection member 150 , and thus may be supported by or suspended at the rear surface of the plate 170 .

[0448] The plate 170 according to an embodiment of the present disclosure may be connected or coupled to the front surface of the vibration device 200 through the above-mentioned connection member 150. For example, the plate 170 may be connected or coupled to the uppermost vibration generator among the plurality of vibration generators 210 and 230 of the vibration device 200 through the connection member 150. For example, when the vibration device 200 includes the first vibration generator 210 and the second vibration generator 230, the plate 170 may be connected or coupled to the first surface of the second vibration generator 230 or the second surface of the first vibration generator 210 through the connection member 150. The plate 170 according to an embodiment of the present disclosure may be integrated into the vibration device 200, or may be provided as an element of the vibration device 200. For example, the plate 170 and the vibration device 200 may be configured as one structure or one component (or module), which is provided as one body. Therefore, when the board 170 is disposed between the rear surface of the display panel 100 and the vibration device 200 , an assembly process between the display panel 100 and the vibration device 200 may be easily performed based on component integration (or modularization) between the board 170 and the vibration device 200 .

[0449] In the case where the plate 170 and the vibration device 200 are configured as a structure or a component (or module) (which is set as a whole), the vibrating object can be used as a vibration plate, so that sound and / or tactile feedback can be achieved based on the vibration of the vibrating object. For example, the vibrating object can be one or more of a non-display panel, wood, plastic, glass, cloth, automobile interior material, automobile glass window, building indoor ceiling, building glass window, building interior material, aircraft interior material, aircraft glass window, etc., but the embodiments of the present disclosure are not limited thereto. For example, the non-display panel can be a light-emitting diode lighting panel (or device), an organic light-emitting lighting panel (or device), an inorganic light-emitting lighting panel (or device), etc., but the embodiments of the present disclosure are not limited thereto.

[0450] According to an embodiment of the present disclosure, the board 170 and the vibration device 200 may be disposed at the non-display panel. The board 170 may be coupled or connected to a module (or structure) of the vibration device 200 through a connection member 150. Therefore, the board 170 and the module (or structure) of the vibration device 200 may vibrate the non-display panel to achieve sound and / or tactile feedback.

[0451] According to another embodiment, in the case where the plate 170 and the vibration device 200 are configured as a structure or a component (or module) (which is provided as a whole), the plate 170 can be used as a vibrating object (or a vibration plate), and thus sound and / or tactile feedback can be achieved based on the vibration of the plate 170. For example, in the structure (or structure body) of the plate 170 and the vibration device 200, the plate 170 may include one or more metal materials among stainless steel, aluminum (Al), magnesium (Mg), magnesium (Mg) alloy, magnesium-lithium (Mg-Li) alloy, and aluminum (Al) alloy, but the embodiments of the present disclosure are not limited thereto. For example, in the module (or structure) of the plate 170 and the vibration device 200, the plate 170 may include one or more single non-metallic materials or composite non-metallic materials among wood, plastic, glass, cloth, and leather.

[0452] Therefore, in a device according to another embodiment of the present disclosure, as described above with reference to Figures 2 to 16 As described above, the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords of the sound generated based on the displacement of the display panel 100 can be increased or enhanced based on the stacked structure of the vibration generators 210 and 230. In addition, in a device according to another embodiment of the present disclosure, the resonant frequency of the vibration device 200 can be reduced by the plate 170, and the heat of the display panel 100 can be dissipated by the plate 170.

[0453] Fig.19 A device according to another embodiment of the present disclosure is illustrated. Fig. 20 It is along Fig.19 A cross-sectional view taken along line VI-VI' is shown. Fig.19 and Fig. 20 Illustrated by modifying Figures 2 to 16 Therefore, in the following description, repeated description of elements other than the vibration device and elements related thereto may be omitted or will be briefly given.

[0454] Reference Fig.19 and Fig. 20 In a device according to another embodiment of the present disclosure, the rear surface (or back surface) of the display panel 100 may include a first area (or first rear area) A1 and a second area (or second rear area) A2. For example, in the rear surface of the display panel 100, the first area A1 may be a left rear area, and the second area A2 may be a right rear area. The first area A1 and the second area A2 may be left-right symmetrical about the center line CL of the display panel 100 in the first direction X, but the embodiments of the present disclosure are not limited thereto. For example, each of the first area A1 and the second area A2 may overlap with the display area of ​​the display panel 100.

[0455] The vibration apparatus 200 according to an embodiment of the present disclosure may include a first vibration device 200 - 1 and a second vibration device 200 - 2 provided in the rear surface of the display panel 100 .

[0456] The first vibration device 200-1 may be disposed at the first area A1 of the display panel 100. For example, the first vibration device 200-1 may be disposed close to the center or periphery of the first area A1 of the display panel 100 relative to the first direction X. The first vibration device 200-1 according to an embodiment of the present disclosure may vibrate the first area A1 of the display panel 100, and thus may generate a first vibration sound PVS1 or a first tactile feedback in the first area A1 of the display panel 100. For example, the first vibration device 200-1 according to an embodiment of the present disclosure may directly vibrate the first area A1 of the display panel 100, and thus may generate a first vibration sound PVS1 or a first tactile feedback in the first area A1 of the display panel 100. For example, the first vibration sound PVS1 may be a left sound. Based on the characteristics of the first vibration sound PVS1 or the sound characteristics required by the device, the size of the first vibration device 200-1 according to an embodiment of the present disclosure may have a size corresponding to half or less of the first area A1 or half or more of the first area A1. As another embodiment of the present disclosure, the size of the first vibration device 200-1 may have a size corresponding to the first area A1 of the display panel 100. For example, the size of the first vibration device 200-1 may have the same size as the first area A1 of the display panel 100 or may have a size smaller than the first area A1 of the display panel 100.

[0457] The second vibration device 200-2 may be disposed at the second area A2 of the display panel 100. For example, the second vibration device 200-2 may be disposed close to the center or periphery of the second area A2 of the display panel 100 relative to the first direction X. The second vibration device 200-2 according to an embodiment of the present disclosure may vibrate the second area A2 of the display panel 100, and thus may generate a second vibration sound PVS2 or a second tactile feedback in the second area A2 of the display panel 100. For example, the second vibration device 200-2 according to an embodiment of the present disclosure may directly vibrate the second area A2 of the display panel 100, and thus may generate a second vibration sound PVS2 or a second tactile feedback in the second area A2 of the display panel 100. For example, the second vibration sound PVS2 may be a right sound. Based on the characteristics of the second vibration sound PVS2 or the sound characteristics required by the device, the size of the second vibration device 200-2 according to an embodiment of the present disclosure may have a size corresponding to half or less of the second area A2 or half or more of the second area A2. As another embodiment of the present disclosure, the size of the second vibration device 200-2 may have a size corresponding to the second area A2 of the display panel 100. For example, the size of the second vibration device 200-2 may have the same size as the second area A2 of the display panel 100 or may have a size smaller than the second area A2 of the display panel 100. Therefore, based on the sound characteristics of left and right sounds and / or the sound characteristics of the device, the first vibration device 200-1 and the second vibration device 200-2 may have the same size or different sizes from each other. In addition, the first vibration device 200-1 and the second vibration device 200-2 may be arranged in a left-right symmetrical structure or a left-right asymmetrical structure with respect to the center line CL of the display panel 100.

[0458] Each of the first vibration device 200-1 and the second vibration device 200-2 may include the above reference Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figures 10 to 14 One or more of the vibration devices 200 are described, and thus their detailed description may be omitted.

[0459] The connection member 150 according to an embodiment of the present disclosure may be disposed between each of the first vibration device 200-1 and the second vibration device 200-2 and the rear surface of the display panel 100. For example, each of the first vibration device 200-1 and the second vibration device 200-2 may be disposed at the rear surface of the display panel 100 through the connection member 150. The connection member 150 may be connected to the first vibration device 200-1 and the second vibration device 200-2 as described above. Figure 2 The described connection members 150 are substantially the same, and thus repeated descriptions thereof are omitted.

[0460] Therefore, the apparatus according to another embodiment of the present disclosure may output the left sound PVS1 and the right sound PVS2 to the front region FD in front of the display panel 100 through the first vibration device 200 - 1 and the second vibration device 200 - 2 to provide sound to the user.

[0461] Fig.21 It is along Fig.19 Another cross-sectional view taken along line VI-VI' is shown and illustrates the Fig. 20 The embodiment of the board is further configured in the illustrated device. Therefore, hereinafter, repeated description of elements other than the board and elements related thereto may be omitted or will be briefly given.

[0462] Reference Fig.21 , a device according to another embodiment of the present disclosure may include a display panel 100 and a vibration device 200 , and may further include a plate 170 disposed between the display panel 100 and the vibration device 200 .

[0463] Each of the display panel 100 and the vibration device 200 may be the same as that described above with reference to Figures 2 to 16 Each of the described display panel 100 and the vibration device 200 is substantially the same, and thus, repeated descriptions thereof may be omitted or will be briefly given.

[0464] The plate 170 may be disposed between each of the first vibration device 200 - 1 and the second vibration device 200 - 2 of the vibration apparatus 200 and the rear surface of the display panel 100 .

[0465] The plate 170 may dissipate heat generated from the display panel 100, or may enhance the mass of the vibration device 200, which is disposed at or suspended from the rear surface of the display panel 100. The plate 170 may have the same shape and size as the rear surface of the display panel 100, or may have the same shape and size as the vibration device 200. As another embodiment of the present disclosure, the plate 170 may have a size different from that of the display panel 100. For example, the plate 170 may be smaller than the size of the display panel 100. As another embodiment of the present disclosure, the plate 170 may have a size different from that of the vibration device 200. For example, the plate 170 may be larger or smaller than the size of the vibration device 200. The vibration device 200 may be the same size as the display panel 100 or smaller than the size of the display panel 100. For example, the plate 170 may be the same size as that of the display panel 100. Fig.17 and 18 The described plates 170 are substantially the same, and thus their repeated descriptions may be omitted.

[0466] The board 170 may be coupled or connected to the rear surface of the display panel 100 by the above-mentioned board connection member (or fourth connection member) 190 .

[0467] Each of the first vibration device 200 - 1 and the second vibration device 200 - 2 of the vibration apparatus 200 may be connected or coupled to the rear surface of the plate 170 through the above-mentioned connection member 150 , and thus may be supported by or suspended therefrom.

[0468] Therefore, the apparatus according to another embodiment of the present disclosure can output the left sound PVS1 and the right sound PVS2 to the front area FD in front of the display panel 100 through the first vibration device 200-1 and the second vibration device 200-2 to provide sound to the user. In addition, in the apparatus according to another embodiment of the present disclosure, the resonance frequency of the vibration device 200 can be reduced by the board 170, and the heat generated by the display panel 100 can be dissipated by the board 170.

[0469] Fig. 22 The present invention illustrates a device according to another embodiment of the present invention and illustrates a Fig.19 , Fig. 20 or Fig.21 The device shown is further provided with an embodiment of a separator. In the following, repeated description of elements other than the separator and elements related thereto may be omitted or will be briefly given.

[0470] Reference Fig.19 , Fig. 20 and Fig. 22 , a device according to another embodiment of the present disclosure may include a display panel 100 and a vibration device 200, and may further include a partition 600 for partitioning a first area A1 and a second area A2 of the display panel 100. The partition 600 may spatially partition the first area A1 and the second area A2 of the display panel 100.

[0471] Each of the display panel 100 and the vibration device 200 may be the same as that described above with reference to Figures 2 to 16 Each of the described display panel 100 and the vibration device 200 is substantially the same, and thus, repeated descriptions thereof may be omitted or will be briefly given.

[0472] The partition 600 may be an air gap or space in which the sounds PVS1 and PVS2 are generated when the display panel 100 is vibrated by the first vibration device 200-1 and the second vibration device 200-2. For example, the partition 600 may separate the sounds PVS1 and PVS2 or the sound channels, and may prevent or reduce the degradation of the sound characteristics caused by the interference of the sounds PVS1 and PVS2. The partition 600 may be referred to as a soundproof member, a sound dividing member, a space dividing member, a housing, a baffle, etc., but embodiments of the present disclosure are not limited thereto.

[0473] The partition 600 according to an embodiment of the present disclosure may include a first partition member 610 and a second partition member 620 disposed between the first vibration device 200 - 1 and the second vibration device 200 - 2 .

[0474] The first and second separation members 610 and 620 may be disposed between the display panel 100 and the support member 300 corresponding to the central region of the display panel 100 .

[0475] The first partition member 610 may be disposed between the display panel 100 and the support member 300 corresponding to the first area A1 of the display panel 100. The first partition member 610 may surround the first vibration device 200-1 individually (or independently). The first partition member 610 according to an embodiment of the present disclosure may have a rectangular shape surrounding the first vibration device 200-1, but the embodiment of the present disclosure is not limited thereto. For example, the first partition member 610 may have a shape that is the same as or different from the overall shape of the first vibration device 200-1. For example, when the first vibration device 200-1 has a square shape, the first partition member 610 may have a square, circular, or elliptical shape that is relatively larger in size than the first vibration device 200-1.

[0476] The second partition member 620 may be disposed between the display panel 100 and the support member 300 corresponding to the second area A2 of the display panel 100. The second partition member 620 may surround the second vibration device 200-2 individually (or independently). The second partition member 620 according to an embodiment of the present disclosure may have a rectangular shape surrounding the second vibration device 200-2, but the embodiment of the present disclosure is not limited thereto. For example, the second partition member 620 may have a shape that is the same as or different from the overall shape of the second vibration device 200-2. For example, when the second vibration device 200-2 has a square shape, the second partition member 620 may have a square, circular or elliptical shape that is relatively larger in size than the second vibration device 200-2.

[0477] According to an embodiment of the present disclosure, the first partition member 610 and the second partition member 620 may have the same or different shapes. For example, the first partition member 610 and the second partition member 620 may have a rectangular shape. For example, the first partition member 610 may have a rectangular ring shape, and the second partition member 620 may have a circular ring shape or an elliptical ring shape.

[0478] The first partition member 610 and the second partition member 620 can separate the first vibration sound PVS1 generated by the first vibration device 200-1 and the second vibration sound PVS2 generated by the second vibration device 200-2. For example, the first partition member 610 and the second partition member 620 can block the vibration generated by the first vibration device 200-1 in the first area A1 of the display panel 100 from being transmitted to the second area A2 of the display panel 100, or can block the vibration generated by the second vibration device 200-2 in the second area A2 of the display panel 100 from being transmitted to the first area A1 of the display panel 100. Therefore, the first partition member 610 and the second partition member 620 can weaken or absorb the vibration of the display panel 100 at the center of the display panel 100, so the first partition member 610 and the second partition member 620 can block the sound of the first area A1 from being transmitted to the second area A2, or can block the sound of the second area A2 from being transmitted to the first area A1. Therefore, the first partition member 610 and the second partition member 620 can separate the left sound and the right sound to further enhance the sound output characteristics of the device. Therefore, the apparatus according to an embodiment of the present disclosure may separate left and right sounds through the first partition member 610 and the second partition member 620 to output two-channel or more-channel sounds to the front region FD in front of the display panel 100 .

[0479] According to an embodiment of the present disclosure, the separator 600 may include a material having elasticity capable of achieving a certain degree of compression. For example, the separator 600 may include polyurethane, polyolefin, etc., but the embodiment of the present disclosure is not limited thereto. As another embodiment of the present disclosure, the separator 600 may include a single-sided tape, a single-sided foam pad, a double-sided tape, a double-sided foam tape, etc., but the embodiment of the present disclosure is not limited thereto.

[0480] As another embodiment of the present disclosure, any one of the first partition member 610 and the second partition member 620 may be omitted. For example, even when one of the first partition member 610 and the second partition member 620 is located between the first vibration device 200-1 and the second vibration device 200-2, the left sound and the right sound may be separated from each other. For example, when the second partition member 620 of the first partition member 610 and the second partition member 620 is omitted, the first partition member 610 may be disposed between the display panel 100 and the support member 300 to correspond to the rear center line CL of the display panel 100.

[0481] Therefore, the first partition member 610 and the second partition member 620 can separate the left sound and the right sound to further enhance the sound output characteristics of the device. The device including the first partition member 610 or the second partition member 620 can separate the left and right sounds through the first partition member 610 or the second partition member 620 to output the sound of two or more channels to the front area in front of the display panel 100.

[0482] The spacer 600 according to an embodiment of the present disclosure may further include a third spacer member 630 between the display panel 100 and the support member 300 .

[0483] The third partition member 630 may be disposed between the rear peripheral portion of the display panel 100 and the front peripheral portion of the support member 300. The third partition member 630 may be disposed to surround all of the first vibration device 200-1 and the second vibration device 200-2. The third partition member 630 may be referred to as an edge partition, a soundproof member, an edge housing, an edge baffle, etc., but the embodiments of the present disclosure are not limited thereto. For example, the third partition member 630 may be adjacent to or in contact with the above-mentioned middle frame 400, and may be surrounded by the middle frame 400. As another embodiment of the present disclosure, the third partition member 630 may be integrated with the middle frame 400.

[0484] The third partition member 630 may provide first to third air gaps AG1 to AG3 between the display panel 100 and the support member 300 together with the first to second partition members 610 and 620. For example, each of the first to third air gaps AG1 to AG3 may be referred to as a vibration space, a sound pressure space, a sound box, a sound component, a resonance box, or a resonance component, but embodiments of the present disclosure are not limited thereto.

[0485] The first air gap AG1 may be disposed in the first area A1 of the display panel 100 , and may be surrounded by the first and third separation members 610 and 630 disposed in the first area A1 of the display panel 100 .

[0486] The second air gap AG2 may be disposed in the second area A2 of the display panel 100 , and may be surrounded by the second and third separation members 620 and 630 disposed in the second area A2 of the display panel 100 .

[0487] The third air gap AG3 may be disposed in a rear central area of ​​the display panel 100 surrounded by the first and second partition members 610, 620, and the third partition member 630. For example, the third air gap AG3 may be disposed between the second air gap AG2 and the first air gap AG1. For example, the third air gap AG3 may be disposed between the second air gap AG2 and the first air gap AG1, including the rear center line CL of the display panel 100. The third air gap AG3 may be referred to as a sound separation space, a soundproof space, a sound interference prevention space, etc., but the embodiments of the present disclosure are not limited thereto. The third air gap AG3 may separate the first air gap AG1 from the second air gap AG2, so the third air gap AG3 may reduce or prevent an interference phenomenon or a resonance phenomenon in a specific frequency band generated in each of the first air gap AG1 and the second air gap AG2. For example, the third air gap AG3 may spatially separate the first air gap AG1 from the second air gap AG2, so the third air gap AG3 may reduce or prevent an interference phenomenon or a resonance phenomenon in a specific frequency band generated in each of the first air gap AG1 and the second air gap AG2.

[0488] The first vibration device 200-1 may be surrounded by the first and third separation members 610 and 630 providing the first air gap AG1. The second vibration device 200-2 may be surrounded by the second and third separation members 620 and 630 providing the second air gap AG2.

[0489] When one of the first and second partition members 610 and 620 is omitted, the third air gap AG3 may be omitted.

[0490] Therefore, the third partition member 630 can surround the area between the display panel 100 and the support member 300, and can surround each of the first vibration device 200-1 and the second vibration device 200-2 separately together with the first partition member 610 and the second partition member 620 to ensure the vibration space of each of the first vibration device 200-1 and the second vibration device 200-2. Therefore, the third partition member 630 can enhance the sound pressure level characteristics of the left and right sounds. In addition, the third partition member 630 can prevent the sound or the sound pressure level from leaking to the outside through the side surface between the display panel 100 and the support member 300, thereby further enhancing the sound output characteristics of the device or display device.

[0491] The partition 600 according to the embodiment of the present disclosure may further include a fourth partition member 640 and a fifth partition member 650 .

[0492] The fourth partition member 640 and the fifth partition member 650 may be disposed between the display panel 100 and the support member 300. For example, the fourth partition member 640 and the fifth partition member 650 may be located between the display panel 100 and the support member 300 corresponding to the central area of ​​the display panel 100. For example, the fourth partition member 640 and the fifth partition member 650 may be disposed in parallel with each other in the central area of ​​the display panel 100. The fourth partition member 640 and the fifth partition member 650 may be disposed at the rear center line CL of the display panel 100 and may separate the first area A1 and the second area A2 of the display panel 100. For example, the fourth partition member 640 and the fifth partition member 650 may spatially divide the first area A1 and the second area A2 of the display panel 100. For example, the fourth partition member 640 and the fifth partition member 650 may separate the first vibration sound PVS1 and the second vibration sound PVS2 generated by the first vibration device 200-1 and the second vibration device 200-2, respectively. For example, the fourth partition member 640 and the fifth partition member 650 can block the vibration generated by the first vibration device 200-1 in the first area A1 of the display panel 100 from being transmitted to the second area A2 of the display panel 100, or can block the vibration generated by the second vibration device 200-2 in the second area A2 of the display panel 100 from being transmitted to the first area A1 of the display panel 100. Therefore, the fourth partition member 640 and the fifth partition member 650 can weaken or absorb the vibration of the display panel 100 at the center of the display panel 100, so the fourth partition member 640 and the fifth partition member 650 can block the sound of the first area A1 from being transmitted to the second area A2, or can block the sound of the second area A2 from being transmitted to the first area A1. Therefore, the fourth partition member 640 and the fifth partition member 650 can separate the left sound and the right sound to further enhance the sound output characteristics of the device. Therefore, the device according to the embodiment of the present disclosure can separate the left and right sounds by the fourth partition member 640 and the fifth partition member 650 to output the sound of two or more channels to the front area FD in front of the display panel 100.

[0493] According to an embodiment of the present disclosure, the fourth partition member 640 and the fifth partition member 650 may include a material having elasticity capable of achieving a certain degree of compression. For example, the fourth partition member 640 and the fifth partition member 650 may include polyurethane, polyolefin, etc., but the embodiment of the present disclosure is not limited thereto. As another embodiment of the present disclosure, the fourth partition member 640 and the fifth partition member 650 may include a single-sided tape, a single-sided foam pad, a double-sided tape, a double-sided foam tape, etc., but the embodiment of the present disclosure is not limited thereto.

[0494] As another embodiment of the present disclosure of the present disclosure, any one of the fourth partition member 640 and the fifth partition member 650 may be omitted. For example, when the fifth partition member 650 of the fourth partition member 640 and the fifth partition member 650 is omitted, the fourth partition member 640 may be disposed between the display panel 100 and the support member 300 to correspond to the rear center line CL of the display panel 100. Even when any one of the fourth partition member 640 and the fifth partition member 650 is disposed between the first vibration device 200-1 and the second vibration device 200-2, left and right sounds may be separated.

[0495] Therefore, the device according to another embodiment of the present disclosure includes the partition 600, so the sound pressure level characteristics and the sound reproduction band of each of the left sound and the right sound can be improved or optimized. For example, the device according to another embodiment of the present disclosure may include at least one or more of the first partition member 610 and the second partition member 620. As another embodiment of the present disclosure, the device according to another embodiment of the present disclosure may include the third partition member 630 without the first partition member 610 and the second partition member 620. As another embodiment of the present disclosure, the device according to another embodiment of the present disclosure may include the third partition member 630 and at least one or more of the first partition member 610 and the second partition member 620. As another embodiment of the present disclosure, the device according to another embodiment of the present disclosure may include the third partition member 630, the fourth partition member 640 and the fifth partition member 650. As another embodiment of the present disclosure, the device according to another embodiment of the present disclosure may include all of the first partition member 610 to the fifth partition member 650.

[0496] exist Fig. 22 In the description related thereto, the spacer 600 has been described as being disposed between the display panel 100 and the support member 300, but the embodiments of the present disclosure are not limited thereto. Fig. 22 The device according to another embodiment of the present disclosure may further include a plate 170 disposed at the rear surface of the display panel 100. In this case, the partition 600 may be disposed between the rear surface of the plate 170 and the support member 300. For example, the first to fifth partition members 610 to 650 of the partition 600 may be disposed between the rear surface of the plate 170 and the support member 300.

[0497] Therefore, the device according to another embodiment of the present disclosure can output the left sound PVS1 and the right sound PVS2 to the front area FD in front of the display panel 100 through the first vibration device 200-1 and the second vibration device 200-2 to provide sound to the user. The device according to another embodiment of the present disclosure can output two or more channels of sound to the front area FD in front of the display panel 100 by separating the left sound PVS1 and the right sound PVS2 according to the partition 600. In addition, in the device according to another embodiment of the present disclosure, the resonance frequency of the vibration device 200 can be lowered by the board 170, and the heat generated from the display panel 100 can be dissipated by the board 170.

[0498] Fig.23 The present invention illustrates a device according to another embodiment of the present disclosure and illustrates a device according to another embodiment of the present invention by modifying Figure 20 to Figure 22 Therefore, in the following description, repeated description of elements other than the vibration device and elements related thereto may be omitted or will be briefly given.

[0499] Reference Fig.23 In a device according to another embodiment of the present disclosure, the vibration device 200 may include first to fourth vibration devices 200 - 1 to 200 - 4 disposed at the rear surface of the display panel 100 .

[0500] The first vibration device 200-1 and the third vibration device 200-3 may be disposed parallel to each other in the first area A1 of the display panel 100 along the first direction (or width direction) X. For example, the first vibration device 200-1 and the third vibration device 200-3 may be disposed in a row in the first area A1 of the display panel 100 along the second direction (or length direction) Y. The first vibration device 200-1 and the third vibration device 200-3 may be surrounded by a partition 600. For example, the first vibration device 200-1 and the third vibration device 200-3 may be surrounded by a first partition (or first housing) 610.

[0501] Each of the first vibration device 200-1 and the third vibration device 200-3 may vibrate the first area A1 of the display panel 100 to generate a first vibration sound (or left sound) PVS1 or a first tactile feedback in the first area A1 of the display panel 100. For example, the vibration area of ​​the first area A1 of the display panel 100 may be increased based on the parallel arrangement structure of the first vibration device 200-1 and the third vibration device 200-3, so that the sound characteristics of the left sound including the low-pitched vocal characteristics may be enhanced. For example, because the third vibration device 200-3 is provided in addition to the first vibration device 200-1, the first vibration sound PVS1 or the first tactile feedback according to another embodiment of the present disclosure may be greater than that in the above reference. Fig. 22 The described first vibration sound PVS1 or first tactile feedback is more enhanced.

[0502] According to another embodiment of the present disclosure, the first vibration device 200-1 may be disposed on the upper side of the center line of the first area A1 of the display panel 100 parallel to the first direction X, and the third vibration device 200-3 may be disposed on the lower side of the center line of the first area A1. The first vibration device 200-1 and the third vibration device 200-3 may be symmetrical (or vertically symmetrical) with respect to the center line of the first area A1. Even in this case, based on the parallel arrangement structure of the first vibration device 200-1 and the third vibration device 200-3, the vibration area of ​​the first area A1 of the display panel 100 may be increased, and therefore, the sound characteristics of the left sound having the low-pitched vocal cord characteristics may be enhanced.

[0503] According to an embodiment of the present disclosure, the interval (or separation distance) between the first vibration device 200-1 and the third vibration device 200-3 may be 0.1 mm or more and less than 3 cm with respect to the second direction Y, but the embodiment of the present disclosure is not limited thereto. Therefore, damage or breakage caused by physical contact between the first vibration device 200-1 and the third vibration device 200-3 may be prevented.

[0504] The second vibration device 200-2 and the fourth vibration device 200-4 may be arranged parallel to each other in the second area A2 of the display panel 100 along the first direction (or width direction) X. For example, the second vibration device 200-2 and the fourth vibration device 200-4 may be arranged in a row in the second area A2 of the display panel 100 along the second direction (or length direction) Y. For example, the second vibration device 200-2 and the fourth vibration device 200-4 may be surrounded by the partition 600. For example, the second vibration device 200-2 and the fourth vibration device 200-4 may be surrounded by the second partition (or second housing) 620.

[0505] Each of the second vibration device 200-2 and the fourth vibration device 200-4 can vibrate the second area A2 of the display panel 100 to generate a second vibration sound (or right sound) PVS2 or a second tactile feedback in the second area A2 of the display panel 100. For example, the vibration area of ​​the second area A2 of the display panel 100 can be increased based on the parallel arrangement structure of the second vibration device 200-2 and the fourth vibration device 200-4, so that the sound characteristics of the right sound including the low-pitched vocal characteristics can be enhanced. For example, because the fourth vibration device 200-4 is provided in addition to the second vibration device 200-2, the second vibration sound PVS2 or the second tactile feedback according to another embodiment of the present disclosure can be more than the above reference Fig. 22The second tactile feedback describing the second vibration sound PVS2 or is more enhanced.

[0506] According to another embodiment of the present disclosure, relative to the center line of the second area A2 of the display panel 100 parallel to the first direction X, the second vibration device 200-2 may be arranged on the upper side of the center line of the second area A2, and the fourth vibration device 200-4 may be arranged on the lower side of the center line of the second area A2. The second vibration device 200-2 and the fourth vibration device 200-4 may be symmetrical (or vertically symmetrical) relative to the center line of the second area A2. Even in this case, based on the parallel arrangement structure of the second vibration device 200-2 and the fourth vibration device 200-4, the vibration area of ​​the second area A2 of the display panel 100 can be increased, and thus the sound characteristics of the right sound with the low-pitched vocal characteristics can be enhanced.

[0507] According to an embodiment of the present disclosure, the interval (or separation distance) between the second vibration device 200-2 and the fourth vibration device 200-4 may be 0.1 mm or more and less than 3 cm with respect to the second direction Y, but the embodiment of the present disclosure is not limited thereto. Therefore, damage or breakage caused by physical contact between the second vibration device 200-2 and the fourth vibration device 200-4 may be prevented.

[0508] The vibration part of each of the plurality of vibration generating parts included in each of the first vibration device 200-1 to the fourth vibration device 200-4 may be the same or different. For example, based on the sound characteristics required by the device, the vibration part 211a of each of the plurality of vibration generating parts included in each of the first vibration device 200-1 to the fourth vibration device 200-4 may include the same as the vibration part 211a of the first vibration device 200-1 to the fourth vibration device 200-4. Figure 3 , Fig.11 , Fig.13 and Fig.14 The vibration parts 211a described above may include one or more of the same vibration parts, or may include different vibration parts 211a. When the vibration part of each of the plurality of vibration generating parts included in each of the first vibration device 200-1 to the fourth vibration device 200-4 may include the above reference Figure 3 , Fig.11 , Fig.13 and Fig.14 When different vibration parts of the vibration part 211 a are described, the vibration device 200 can have various resonance frequencies, and thus the reproduction frequency band and sound pressure level characteristics of the sound generated based on the vibration of the vibration device 200 can be significantly increased.

[0509] According to an embodiment of the present disclosure, Fig.23In the description related thereto, the vibration device 200 according to the embodiment of the present disclosure has been described as the first vibration device 200-1 and the third vibration device 200-3 can be parallel to each other along the first direction (or width direction) X, or can be arranged in a row, but the embodiment of the present disclosure is not limited thereto. For example, the first vibration device 200-1 and the third vibration device 200-3 can be configured to have a parallel arrangement structure, which are arranged parallel to each other along the second direction (or length direction) Y or arranged in a row along the first direction (or width direction) X. Even in this case, the same as Fig.23 Similarly, the second vibration device 200-2 and the fourth vibration device 200-4 may be configured to have a parallel arrangement structure, which are arranged parallel to each other along the second direction (or length direction) Y or arranged in a row along the first direction (or width direction) X. Even in this case, the same effect as Fig.23 Same effect.

[0510] Fig.24 The present invention illustrates a device according to another embodiment of the present disclosure and illustrates a device according to another embodiment of the present invention by modifying Figure 20 to Figure 22 Therefore, in the following description, repeated description of elements other than the vibration device and elements related thereto may be omitted or will be briefly given.

[0511] Reference Fig.24 In a device according to another embodiment of the present disclosure, the vibration device 200 may include first to fourth vibration devices 200 - 1 to 200 - 4 disposed at the rear surface of the display panel 100 .

[0512] The first vibration device 200-1 and the third vibration device 200-3 may be staggered or arranged in a diagonal direction within the first area A1 of the display panel 100, so that the first vibration device 200-1 and the third vibration device 200-3 may increase the vibration area of ​​the first area A1 of the display panel 100. For example, the diagonal direction may be a direction between the first direction X and the second direction Y. The first vibration device 200-1 and the third vibration device 200-3 may be surrounded by a partition 600. For example, the first vibration device 200-1 and the third vibration device 200-3 may be surrounded by a fourth partition member (or a first housing) 640.

[0513] Each of the first vibration device 200-1 and the third vibration device 200-3 may vibrate the first area A1 of the display panel 100 to generate a first vibration sound (or left sound) PVS1 or a first tactile feedback in the first area A1 of the display panel 100. For example, the vibration area of ​​the first area A1 of the display panel 100 may be increased based on the diagonal arrangement structure of the first vibration device 200-1 and the third vibration device 200-3, so that the low-pitched vocal characteristics of the left sound may be enhanced. For example, because the third vibration device 200-3 is provided in addition to the first vibration device 200-1, the first vibration sound PVS1 or the first tactile feedback according to another embodiment of the present disclosure may be greater than that in the above reference. Fig. 22 The described first vibration sound PVS1 or first tactile feedback is more enhanced.

[0514] According to an embodiment of the present disclosure, the first vibration device 200-1 may be disposed near the peripheral portion of the first area A1 of the display panel 100. For example, the first vibration device 200-1 may be disposed in the upper left area adjacent to the peripheral portion of the display panel 100 within the first area A1 of the display panel 100. The third vibration device 200-3 may be disposed near the center line CL of the display panel 100 located within the first area A1 of the display panel 100. For example, the third vibration device 200-3 may be disposed in the lower right area adjacent to the center line CL of the display panel 100 within the first area A1 of the display panel 100. The third vibration device 200-3 may be staggered relative to the first vibration device 200-1 within the first area A1 of the display panel 100, and therefore, may not overlap with the first vibration device 200-1 in the first direction X and the second direction Y.

[0515] The diagonal arrangement structure of the first and third vibration devices 200-1 and 200-3 may have an effect in which two vibration devices may be disposed in a 2×2 structure in the first area A1 of the display panel 100. Therefore, the number of vibration devices for vibrating the first area A1 of the display panel 100 may be reduced by half.

[0516] The second vibration device 200-2 and the fourth vibration device 200-4 may be staggered or arranged in a diagonal direction within the second area A2 of the display panel 100, and thus, the second vibration device 200-2 and the fourth vibration device 200-4 may increase the vibration area of ​​the second area A2 of the display panel 100. The second vibration device 200-2 and the fourth vibration device 200-4 may be surrounded by the partition 600. For example, the second vibration device 200-2 and the fourth vibration device 200-4 may be surrounded by the fifth partition member (or second housing) 650.

[0517] Each of the second vibration device 200-2 and the fourth vibration device 200-4 can vibrate the second area A2 of the display panel 100 to generate a second vibration sound (or right sound) PVS2 or a second tactile feedback in the second area A2 of the display panel 100. For example, the vibration area of ​​the second area A2 of the display panel 100 can be increased based on the diagonal arrangement structure of the second vibration device 200-2 and the fourth vibration device 200-4, and thus, the low-pitched vocal characteristics of the right sound can be enhanced. For example, because the fourth vibration device 200-4 is provided in addition to the second vibration device 200-2, the second vibration sound PVS2 or the second tactile feedback according to another embodiment of the present disclosure can be more Fig. 22 The described second vibration sound PVS2 or second tactile feedback is more enhanced.

[0518] According to an embodiment of the present disclosure, the second vibration device 200-2 may be disposed near the peripheral portion of the second area A2 of the display panel 100. For example, the second vibration device 200-2 may be disposed in the upper right area adjacent to the peripheral portion of the display panel 100 in the second area A2 of the display panel 100. In addition, the first vibration device 200-1 and the second vibration device 200-2 may be bilaterally symmetrical with respect to the center line CL of the display panel 100 in the first direction X, but the embodiment of the present disclosure is not limited thereto. The fourth vibration device 200-4 may be disposed in the second area A2 of the display panel 100 near the center line CL of the display panel 100. For example, the fourth vibration device 200-4 may be disposed in the lower left area adjacent to the center line CL of the display panel 100 in the second area A2 of the display panel 100. The fourth vibration device 200-4 may be staggered relative to the second vibration device 200-2 in the second area A2 of the display panel 100, and thus may not overlap with the second vibration device 200-2 in the first direction X and the second direction Y. In addition, the second vibration device 200-2 may be symmetrical with the first vibration device 200-1 with respect to the center line CL of the display panel 100, and the fourth vibration device 200-4 may be symmetrical with the third vibration device 200-3 with respect to the center line CL of the display panel 100.

[0519] The diagonal arrangement structure of the second vibration device 200-2 and the fourth vibration device 200-4 may have an effect in which two vibration devices may be disposed in a 2×2 structure in the second area A2 of the display panel 100. Therefore, the number of vibration devices for vibrating the second area A2 of the display panel 100 may be reduced by half.

[0520] The vibration part 211a of each of the plurality of vibration generating parts included in each of the first vibration device 200-1 to the fourth vibration device 200-4 may be the same or different. For example, based on the sound characteristics required by the device, the vibration part 211a of each of the plurality of vibration generating parts included in each of the first vibration device 200-1 to the fourth vibration device 200-4 may include the same as described above with reference to Figure 3 , Fig.11 , Fig.13 and Fig.14 The vibration parts 211a described above may include one or more of the same vibration parts, or may include different vibration parts 211a. When the vibration part of each of the plurality of vibration generating parts included in each of the first vibration device 200-1 to the fourth vibration device 200-4 may include the above reference Figure 3 , Fig.11 , Fig.13 and Fig.14 When different vibration parts of the vibration part 211 a are described, the vibration device 200 can have various resonance frequencies, and thus the reproduction frequency band and sound pressure level characteristics of the sound generated based on the vibration of the vibration device 200 can be significantly increased.

[0521] The arrangement structure of the first vibration device 200-1 to the fourth vibration device 200-4 is not limited to Fig.24 For example, in each of the first area A1 and the second area A2 of the display panel 100, when the direction between the upper left and the lower right is referred to as the first diagonal direction and the direction between the upper right and the lower left is referred to as the second diagonal direction, the first vibration device 200-1 and the third vibration device 200-3 may be arranged along the first diagonal direction or the second diagonal direction, and the second vibration device 200-2 and the fourth vibration device 200-4 may be arranged along a diagonal direction that is the same as or different from the diagonal arrangement direction of the first vibration device 200-1 and the third vibration device 200-3 among the first diagonal direction and the second diagonal direction. For example, the first vibration device 200-1 and the second vibration device 200-2 may be arranged in a left-right symmetrical structure or a left-right asymmetrical structure with respect to the center line CL of the display panel 100. The third vibration device 200-3 and the fourth vibration device 200-4 may be arranged in a left-right symmetrical structure or a left-right asymmetrical structure with respect to the center line CL of the display panel 100.

[0522] Therefore, the device according to another embodiment of the present disclosure can be used as described above. Fig. 22The device described above provides sound to the user in the same manner, and can output two or more channels of sound to the front area FD in front of the display panel 100. In addition, in a device according to another embodiment of the present disclosure, the resonance frequency of the vibration device 200 can be reduced, and the heat generated from the display panel 100 can be dissipated. In addition, in a device according to another embodiment of the present specification, the vibration area of ​​each of the first area A1 and the second area A2 of the display panel 100 can be increased based on the diagonal arrangement direction of the first vibration device 200-1 and the third vibration device 200-3 and the diagonal arrangement direction of the second vibration device 200-2 and the fourth vibration device 200-4, so the low-pitched vocal characteristics of the sound can be further enhanced.

[0523] Fig.25 The sound output characteristics of each of the device according to the embodiment of the present disclosure and the device according to the comparative example are illustrated.

[0524] The sound output characteristics can be measured by a sound analysis device. The sound analysis device may include a sound card that sends sound to or receives sound from a control personal computer (PC), an amplifier that amplifies a signal generated from the sound card and transmits the amplified signal to a vibration device, and a microphone that collects sound generated based on the driving of the vibration device in the display panel. The sound collected by the microphone can be input to the control PC through the sound card, and the control program can check the input sound to analyze the sound output characteristics of the vibration device.

[0525] Fig.25 The thin solid line represents the result obtained by measuring the sound output characteristics of the display device according to the comparative example. Fig.25 The thick solid line of represents the result obtained by measuring the sound output characteristics of the display device according to the embodiment of the present disclosure, and the display device according to the embodiment of the present disclosure includes a vibration device having a plurality of vibration generators or a stacked structure of vibration generators. Fig.25 , the horizontal axis represents frequency (Hz) and the vertical axis represents sound pressure level (SPL) (dB).

[0526] Reference Fig.25 , it can be seen that the display device according to the embodiment of the present disclosure has a higher sound pressure level in the middle and low-pitched sound band (e.g., about 50 Hz to about 1000 Hz) compared with the display device according to the comparative example. Therefore, compared with the display device according to the comparative example, the display device according to the embodiment of the present disclosure has a higher sound pressure level in the middle and low-pitched sound band (e.g., about 50 Hz to about 1000 Hz) due to the stacked structure of the plurality of vibration generators.

[0527] A device according to an embodiment of the present disclosure will be described below.

[0528] A device according to an embodiment of the present disclosure may include a display panel configured to display an image, and a vibration device that vibrates the display panel at a rear surface of the display panel, and the vibration device may include a plurality of vibration generators overlapping each other.

[0529] According to some embodiments of the present disclosure, each of the plurality of vibration generators may be displaced in the same direction.

[0530] According to some embodiments of the present disclosure, each of the plurality of vibration generators may have the same size.

[0531] According to some embodiments of the present disclosure, an end portion of each of the plurality of vibration generators may be aligned on a virtual extension line extending in a thickness direction of the display panel.

[0532] A device according to an embodiment of the present disclosure may include a display panel configured to display an image, a vibration device at a rear surface of the display panel, and a plate disposed between the display panel and the vibration device, the vibration device may include a plurality of vibration generators stacked to be displaced in the same direction, and an adhesive member between the plurality of vibration generators.

[0533] According to some embodiments of the present disclosure, the plurality of vibration generators may be symmetrical to each other with respect to the bonding member.

[0534] According to some embodiments of the present disclosure, the display panel may include a first area and a second area, the vibration device may include a first vibration device disposed at the first area and a second vibration device disposed at the second area, and each of the first vibration device and the second vibration device may include a plurality of vibration generators and an adhesive member.

[0535] According to some embodiments of the present disclosure, the device may further include a supporting member disposed at a rear surface of the display panel, and a spacer disposed between the rear surface of the display panel and the supporting member, the spacer being between the first area and the second area.

[0536] According to some embodiments of the present disclosure, the vibration apparatus may further include a third vibration device disposed in the first area, and a fourth vibration device disposed in the second area, and each of the third vibration device and the fourth vibration device may include a plurality of vibration generators and an adhesive member.

[0537] According to some embodiments of the present disclosure, the first vibration device and the third vibration device may be disposed in parallel or staggered in the first region, and the second vibration device and the fourth vibration device may be disposed in parallel or staggered in the second region.

[0538] According to some embodiments of the present disclosure, each of the plurality of vibration generators may include a vibration structure, a first protection member disposed at a first surface of the vibration structure, and a second protection member disposed at a second surface of the vibration structure different from the first surface.

[0539] According to some embodiments of the present disclosure, the vibration structure may include a vibration portion, a first electrode portion disposed between the vibration portion and the first protective member, and a second electrode portion disposed between the vibration portion and the second protective member.

[0540] According to some embodiments of the present disclosure, each of a plurality of vibration generators may include: a vibration portion including a plurality of inorganic material portions having piezoelectric properties and an organic material portion having an organic material between the plurality of inorganic materials; a first electrode portion disposed at a first surface of the vibration portion; and a second electrode portion disposed at a second surface of the vibration portion that is different from the first surface.

[0541] According to some embodiments of the present disclosure, the inorganic material portion of a vibration generator disposed at an upper layer among a plurality of vibration generators may overlap with the inorganic material portion of a vibration generator disposed at a lower layer among a plurality of vibration generators, and / or the organic material portion of a vibration generator disposed at an upper layer may overlap with the organic material portion of a vibration generator disposed at a lower layer.

[0542] According to some embodiments of the present disclosure, the bonding member may include a first bonding layer and a second bonding layer, each of the plurality of vibration generators may include a plurality of vibration generating parts arranged along a first direction and a second direction intersecting the first direction; a first protective member disposed at a first surface of each of the plurality of vibration generating parts through the first bonding layer; and a second protective member disposed at a second surface of each of the plurality of vibration generating parts through the second bonding layer.

[0543] According to some embodiments of the present disclosure, a plurality of vibration generating portions may be electrically separated from each other and spaced a distance apart from each other.

[0544] According to some embodiments of the present disclosure, the distance may be in the range from 0.1 mm to 3 cm.

[0545] According to some embodiments of the present disclosure, the first adhesive layer and the second adhesive layer may be coupled to each other to surround the plurality of vibration generating parts.

[0546] According to some embodiments of the present disclosure, each of the plurality of vibration generating parts may include a vibration part, a first electrode part disposed at a first surface of the vibration part, and a second electrode part disposed at a second surface of the vibration part different from the first surface.

[0547] According to some embodiments of the present disclosure, the vibration portion may include a plurality of inorganic material portions, and an organic material portion having an organic material between the plurality of inorganic material portions.

[0548] According to some embodiments of the present disclosure, the inorganic material portion of a vibration generator disposed at an upper layer among a plurality of vibration generators may overlap with the inorganic material portion of a vibration generator disposed at a lower layer among a plurality of vibration generators, and / or the organic material portion of a vibration generator disposed at an upper layer may overlap with the organic material portion of a vibration generator disposed at a lower layer.

[0549] According to some embodiments of the present disclosure, each of a plurality of vibration generators may include a vibration portion, a first electrode portion disposed on a first surface of the vibration portion, and a second electrode portion disposed at a second surface of the vibration portion that is different from the first surface, and the first electrode portion of each of the plurality of vibration generators may be disposed closer to the display panel than the second electrode portion.

[0550] According to some embodiments of the present disclosure, the device may also include a vibration drive circuit, which includes multiple amplifiers respectively connected to multiple vibration generators, the multiple vibration generators may include a first group and a second group, the multiple amplifiers may include a first amplifier group and a second amplifier group, the amplifiers of the first amplifier group may include a first output terminal connected to the first electrode part of the vibration generator of the first group, and a second output terminal connected to the second electrode part of the vibration generator of the first group, and the amplifiers of the second amplifier group may include a first output terminal connected to the second electrode part of the vibration generator of the second group, and a second output terminal connected to the first electrode part of the vibration generator of the second group.

[0551] According to some embodiments of the present disclosure, each of a plurality of vibration generators may include a vibration part, a first electrode part arranged at a first surface of the vibration part, and a second electrode part arranged at a second surface of the vibration part different from the first surface, and the plurality of vibration generators may be a first group and a second group, and in the vibration generators of the first group, the first electrode part may be arranged closer to the display panel than the second electrode part, and in the vibration generators of the second group, the second electrode part may be arranged closer to the display panel than the first electrode part.

[0552] According to some embodiments of the present disclosure, the device may also include a vibration drive circuit, which includes multiple amplifiers respectively connected to the multiple vibration generators, each of the multiple amplifiers may include a first output terminal connected to the first electrode part of the corresponding vibration generator among the multiple vibration generators; and a second output terminal connected to the second electrode part of the corresponding vibration generator among the multiple vibration generators.

[0553] A vibration device according to an embodiment of the present disclosure may include a plurality of vibration generators stacked to be displaced in the same direction, and an adhesive member between the plurality of vibration generators.

[0554] According to some embodiments of the present disclosure, the plurality of vibration generators may be symmetrical to each other with respect to the bonding member.

[0555] According to some embodiments of the present disclosure, each of the plurality of vibration generators may have the same size.

[0556] According to some embodiments of the present disclosure, an end portion of each of the plurality of vibration generators may be aligned on a virtual extension line extending in a thickness direction of the vibration device.

[0557] According to some embodiments of the present disclosure, the vibration device may further include a plate disposed at an uppermost vibration generator among the plurality of vibration generators.

[0558] According to some embodiments of the present disclosure, the plate and each of the plurality of vibration generators may have the same size.

[0559] According to some embodiments of the present disclosure, the board may include a metal material, or one or more single non-metal materials or composite non-metal materials including wood, plastic, glass, cloth and leather.

[0560] According to some embodiments of the present disclosure, the bonding member may include a first bonding layer and a second bonding layer, each of the plurality of vibration generators may include a plurality of vibration generating parts arranged along a first direction and a second direction intersecting the first direction; a first protective member disposed at a first surface of each of the plurality of vibration generating parts through the first bonding layer; and a second protective member disposed at a second surface of each of the plurality of vibration generating parts through the second bonding layer.

[0561] According to some embodiments of the present disclosure, a plurality of vibration generating portions may be electrically separated from each other and spaced a distance apart from each other.

[0562] According to some embodiments of the present disclosure, the distance may be in the range from 0.1 mm to 3 cm.

[0563] According to some embodiments of the present disclosure, the first adhesive layer and the second adhesive layer may be coupled to each other to surround the plurality of vibration generating parts.

[0564] According to some embodiments of the present disclosure, each of the plurality of vibration generating parts may include a vibration part, a first electrode part disposed at a first surface of the vibration part, and a second electrode part disposed at a second surface of the vibration part different from the first surface.

[0565] According to some embodiments of the present disclosure, the vibration portion may include a plurality of inorganic material portions, and an organic material portion having an organic material between the plurality of inorganic material portions.

[0566] According to some embodiments of the present disclosure, the inorganic material portion of a vibration generator disposed at an upper layer among a plurality of vibration generators may overlap with the inorganic material portion of a vibration generator disposed at a lower layer among a plurality of vibration generators, and / or the organic material portion of a vibration generator disposed at an upper layer may overlap with the organic material portion of a vibration generator disposed at a lower layer.

[0567] According to some embodiments of the present disclosure, each of a plurality of vibration generators may include a vibration part, which includes a plurality of inorganic material parts having piezoelectric properties and an organic material part between the plurality of inorganic material parts, a first electrode part being disposed at a first surface of the vibration part, and a second electrode part being disposed at a second surface of the vibration part that is different from the first surface.

[0568] According to some embodiments of the present disclosure, the vibration device may further include a vibration drive circuit, the vibration drive circuit including multiple amplifiers respectively connected to multiple vibration generators, the multiple vibration generators may include a first group and a second group, the multiple amplifiers may include a first amplifier group and a second amplifier group, the amplifiers of the first amplifier group may include a first output terminal connected to a first electrode portion of the vibration generator of the first group and a second output terminal connected to a second electrode portion of the vibration generator of the first group, the amplifiers of the second amplifier group may include a first output terminal connected to the second electrode portion of the vibration generator of the second group, and a second output terminal connected to the first electrode portion of the vibration generator of the second group.

[0569] A device according to an embodiment of the present disclosure may include a vibrating object, and a vibrating device in the vibrating object, and the vibrating device may include a plurality of vibration generators stacked to be displaced in the same direction, and a bonding member between the plurality of vibration generators.

[0570] According to some embodiments of the present disclosure, the plurality of vibration generators may be symmetrical to each other with respect to the bonding member.

[0571] According to some embodiments of the present disclosure, each of the plurality of vibration generators may have the same size.

[0572] According to some embodiments of the present disclosure, an end portion of each of the plurality of vibration generators may be aligned on a virtual extension line extending in a thickness direction of the vibration device.

[0573] According to some embodiments of the present disclosure, the vibrating object may include a plate, which may include a metal material, or include one or more single non-metallic materials or composite non-metallic materials among wood, plastic, glass, cloth and leather.

[0574] According to some embodiments of the present disclosure, the plate and each of the plurality of vibration generators may have the same size.

[0575] According to some embodiments of the present disclosure, the vibrating object may include a display panel including a plurality of pixels configured to display an image, or a non-display panel including any one of a light emitting diode lighting panel, an organic light emitting lighting panel, and an inorganic light emitting lighting panel.

[0576] According to some embodiments of the present disclosure, the vibrating object may include a display panel including a plurality of pixels configured to display an image, or include one or more of vehicle interior materials, vehicle glass windows, building ceilings, building glass windows, building interior materials, aircraft interior materials, and aircraft glass windows.

[0577] According to some embodiments of the present disclosure, each of the plurality of vibration generators may include a vibration part, the vibration part including a plurality of inorganic material parts having piezoelectric properties and an organic material part having an organic material between the plurality of inorganic materials, a first electrode part being disposed at a first surface of the vibration part, and a second electrode part being disposed at a second surface of the vibration part that is different from the first surface.

[0578] It will be apparent to those skilled in the art that various modifications and changes may be made to the present disclosure without departing from the technical concept or scope of the present disclosure. Therefore, the embodiments of the present disclosure may be intended to cover modifications and changes of the present disclosure as long as they fall within the scope of the appended claims and their equivalents.

[0579] CROSS-REFERENCE TO RELATED APPLICATIONS

[0580] This application claims the benefit of and priority to Korean Patent Application No. 10-2020-0110489, filed on August 31, 2020, which is hereby incorporated by reference in its entirety.

Claims

1. An electronic device, comprising: a display panel, the display panel being configured to display an image; as well as a vibration device at a rear surface of the display panel to vibrate the display panel, Wherein, the vibration device comprises a plurality of vibration generators overlapping each other, Wherein, each of the plurality of vibration generators comprises: a first protective member; a second protective member; a vibration structure, the vibration structure being between the first protection member and the second protection member; a first adhesive layer disposed between one side of the vibration structure and the first protective member; and a second adhesive layer disposed between the other side of the vibration structure and the second protective member, and Wherein, the first adhesive layer and the second adhesive layer are coupled to each other to completely surround the vibration structure.

2. The electronic device according to claim 1, wherein: Each of the plurality of vibration generators is displaced in the same direction.

3. The electronic device according to claim 1, wherein: Each of the plurality of vibration generators has the same size.

4. The electronic device according to claim 1, wherein: An end portion of each of the plurality of vibration generators is aligned on a virtual extension line extending in a thickness direction of the display panel.

5. An electronic device, comprising: a display panel, the display panel being configured to display an image; a vibration device at a rear surface of the display panel; as well as a plate disposed between the display panel and the vibration device, Wherein, the vibration device comprises: a plurality of vibration generators stacked to be displaced in the same direction; and a bonding member between the plurality of vibration generators, Wherein, each of the plurality of vibration generators comprises: a first protective member; a second protective member; a vibration structure between the first protection member and the second protection member; a first adhesive layer disposed between one side of the vibration structure and the first protective member; and a second adhesive layer disposed between the other side of the vibration structure and the second protective member, and Wherein, the first adhesive layer and the second adhesive layer are coupled to each other to completely surround the vibration structure.

6. The electronic device according to claim 5, wherein: The plurality of vibration generators are symmetrical to each other with respect to the bonding member.

7. The electronic device according to claim 5, in, The display panel includes a first area and a second area. The vibration device includes a first vibration device disposed at the first area and a second vibration device disposed at the second area, and Wherein, each of the first vibration device and the second vibration device includes the plurality of vibration generators and the bonding member.

8. The electronic device according to claim 7, further comprising: a supporting member disposed at the rear surface of the display panel; as well as A spacer is disposed between the rear surface of the display panel and the support member, the spacer being between the first area and the second area.

9. The electronic device according to claim 7, in, The vibration device also includes: a third vibration device, the third vibration device being disposed in the first area; and a fourth vibration device, the fourth vibration device being arranged in the second area, and Wherein, each of the third vibration device and the fourth vibration device includes the plurality of vibration generators and the bonding member.

10. The electronic device according to claim 9, in, The first vibration device and the third vibration device are arranged in parallel or staggered in the first area, and Wherein, the second vibration device and the fourth vibration device are arranged in parallel or staggered in the second area.

11. The electronic device according to any one of claims 1 to 10, wherein: The vibration structure comprises: Vibration part; a first electrode portion provided between the vibration portion and the first protection member; and A second electrode portion is provided between the vibration portion and the second protection member.

12. The electronic device according to any one of claims 1 to 10, wherein: The vibration structure comprises: a vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion having an organic material between the plurality of inorganic material portions; a first electrode portion provided at a first surface of the vibration portion; and A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

13. The electronic device according to claim 12, in, An inorganic material portion of a vibration generator disposed at an upper layer among the plurality of vibration generators overlaps an inorganic material portion of a vibration generator disposed at a lower layer among the plurality of vibration generators, and / or The organic material portion of the vibration generator disposed on the upper layer overlaps the organic material portion of the vibration generator disposed on the lower layer.

14. The electronic device according to any one of claims 1 to 10, wherein: The vibration structure comprises: a plurality of vibration generating parts, the plurality of vibration generating parts being arranged along a first direction and a second direction crossing the first direction, The first protective member is provided at a first surface of each of the plurality of vibration generating parts through the first adhesive layer, and The second protective member is disposed at a second surface of each of the plurality of vibration generating portions through the second adhesive layer.

15. The electronic device according to claim 14, wherein: The plurality of vibration generating portions are electrically separated from one another and spaced a distance apart from one another.

16. The electronic device according to claim 15, wherein: The distance is in the range from 0.1 mm to 3 cm.

17. The electronic device according to claim 14, wherein: The first adhesive layer and the second adhesive layer are coupled to each other to surround the plurality of vibration generating portions.

18. The electronic device according to claim 14, wherein: The vibration structure comprises: Vibration part; a first electrode portion provided at a first surface of the vibration portion; and A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

19. The electronic device according to claim 18, wherein: The vibration part comprises: a plurality of inorganic material portions; and an organic material portion between the plurality of inorganic material portions.

20. The electronic device according to claim 19, in, An inorganic material portion of a vibration generator disposed at an upper layer among the plurality of vibration generators overlaps an inorganic material portion of a vibration generator disposed at a lower layer among the plurality of vibration generators, and / or The organic material portion of the vibration generator disposed on the upper layer overlaps the organic material portion of the vibration generator disposed on the lower layer.

21. The electronic device according to any one of claims 1 to 10, in, The vibration structure comprises: Vibration part; a first electrode portion provided at a first surface of the vibration portion; and a second electrode portion provided at a second surface of the vibration portion different from the first surface, and The first electrode portion of each of the plurality of vibration generators is disposed closer to the display panel than the second electrode portion.

22. The electronic device according to claim 21, further comprising a vibration driving circuit, wherein the vibration driving circuit comprises a plurality of amplifiers respectively connected to the plurality of vibration generators, in, The plurality of vibration generators include a first group and a second group, The plurality of amplifiers include a first amplifier group and a second amplifier group, wherein the amplifier of the first amplifier group includes a first output terminal connected to a first electrode portion of the vibration generator of the first group, and a second output terminal connected to a second electrode portion of the vibration generator of the first group, and The amplifier of the second amplifier group includes a first output terminal connected to the second electrode portion of the vibration generator of the second group, and a second output terminal connected to the first electrode portion of the vibration generator of the second group.

23. The electronic device according to any one of claims 1 to 10, wherein: The vibration structure comprises: Vibration part; a first electrode portion provided at a first surface of the vibration portion; and a second electrode portion provided at a second surface of the vibration portion different from the first surface, wherein the plurality of vibration generators include a first group and a second group, wherein, in the vibration generator of the first group, the first electrode portion is disposed closer to the display panel than the second electrode portion, and Among them, in the vibration generator of the second group, the second electrode portion is arranged closer to the display panel than the first electrode portion.

24. The electronic device according to claim 23, further comprising a vibration driving circuit, wherein the vibration driving circuit comprises a plurality of amplifiers respectively connected to the plurality of vibration generators, in, Each of the plurality of amplifiers comprises: a first output terminal connected to a first electrode portion of a corresponding vibration generator among the plurality of vibration generators; and A second output terminal connected to a second electrode portion of a corresponding vibration generator among the plurality of vibration generators.

25. A vibration device, comprising: a plurality of vibration generators, the plurality of vibration generators being stacked so as to be displaced in the same direction; as well as a bonding member between the plurality of vibration generators, Wherein, each of the plurality of vibration generators comprises: a first protective member; a second protective member; a vibration structure between the first protection member and the second protection member; a first adhesive layer disposed between one side of the vibration structure and the first protective member; and a second adhesive layer disposed between the other side of the vibration structure and the second protective member, and Wherein, the first adhesive layer and the second adhesive layer are coupled to each other to completely surround the vibration structure.

26. The vibration device according to claim 25, wherein The plurality of vibration generators are symmetrical to each other with respect to the bonding member.

27. The vibration device according to claim 25, wherein Each of the plurality of vibration generators has the same size.

28. The vibration device of claim 25, wherein: An end portion of each of the plurality of vibration generators is aligned on a virtual extension line extending in a thickness direction of the vibration device. 29 . The vibration device of claim 25 , further comprising a plate provided at an uppermost vibration generator among the plurality of vibration generators.

30. The vibration device of claim 29, wherein: The plate and each of the plurality of vibration generators have the same size.

31. The vibration device of claim 29, wherein: The board includes a metal material, or includes one or more single non-metal materials or composite non-metal materials selected from wood, plastic, glass, cloth and leather.

32. A vibration device according to any one of claims 25 to 31, wherein The vibration structure comprises: a plurality of vibration generating parts, the plurality of vibration generating parts being arranged along a first direction and a second direction crossing the first direction, The first protective member is provided at a first surface of each of the plurality of vibration generating parts through the first adhesive layer, and The second protective member is disposed at a second surface of each of the plurality of vibration generating portions through the second adhesive layer.

33. The vibration device of claim 32, wherein: The plurality of vibration generating portions are electrically separated from one another and spaced a distance apart from one another.

34. The vibration device of claim 33, wherein: The distance is in the range from 0.1 mm to 3 cm.

35. The vibration device of claim 32, wherein: The first adhesive layer and the second adhesive layer are coupled to each other to surround the plurality of vibration generating portions.

36. The vibration device of claim 32, wherein: Each of the plurality of vibration generating sections comprises: Vibration part; a first electrode portion provided at a first surface of the vibration portion; and A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

37. A vibration device according to claim 36, wherein The vibration part comprises: a plurality of inorganic material portions; and an organic material portion between the plurality of inorganic material portions.

38. A vibration device according to claim 37, in, An inorganic material portion of a vibration generator disposed at an upper layer among the plurality of vibration generators overlaps an inorganic material portion of a vibration generator disposed at a lower layer among the plurality of vibration generators, and / or The organic material portion of the vibration generator disposed on the upper layer overlaps the organic material portion of the vibration generator disposed on the lower layer.

39. A vibration device according to any one of claims 25 to 31, wherein The vibration structure comprises: a vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion having an organic material between the plurality of inorganic material portions; a first electrode portion provided at a first surface of the vibration portion; and A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

40. The vibration device according to claim 39, further comprising a vibration driving circuit, the vibration driving circuit comprising a plurality of amplifiers respectively connected to the plurality of vibration generators, in, The plurality of vibration generators include a first group and a second group, The plurality of amplifiers include a first amplifier group and a second amplifier group, wherein the amplifier of the first amplifier group includes a first output terminal connected to a first electrode portion of the vibration generator of the first group, and a second output terminal connected to a second electrode portion of the vibration generator of the first group, and The amplifier of the second amplifier group includes a first output terminal connected to the second electrode portion of the vibration generator of the second group, and a second output terminal connected to the first electrode portion of the vibration generator of the second group.

41. An electronic device, comprising: vibrating objects; as well as a vibration device, wherein the vibration device is located at the vibration object, Wherein, the vibration device comprises: a plurality of vibration generators stacked to be displaced in the same direction; and a bonding member between the plurality of vibration generators, Wherein, each of the plurality of vibration generators comprises: a first protective member; a second protective member; a vibration structure between the first protection member and the second protection member; a first adhesive layer disposed between one side of the vibration structure and the first protective member; and a second adhesive layer disposed between the other side of the vibration structure and the second protective member, and Wherein, the first adhesive layer and the second adhesive layer are coupled to each other to completely surround the vibration structure.

42. The electronic device according to claim 41, wherein: The plurality of vibration generators are symmetrical to each other compared to the bonding member.

43. The electronic device according to claim 41, wherein: Each of the plurality of vibration generators has the same size.

44. The electronic device according to claim 41, wherein: An end portion of each of the plurality of vibration generators is aligned on a virtual extension line extending in a thickness direction of the vibration device.

45. The electronic device according to claim 41, wherein: The vibrating object comprises a plate, and The board includes a metal material, or includes one or more single non-metal materials or composite non-metal materials selected from wood, plastic, glass, cloth and leather.

46. ​​The electronic device according to claim 45, wherein: The plate and each of the plurality of vibration generators have the same size.

47. The electronic device according to claim 41, wherein: The vibrating object includes a display panel including a plurality of pixels configured to display an image, or the vibrating object includes a non-display panel of any one of a light emitting diode lighting panel, an organic light emitting lighting panel, and an inorganic light emitting lighting panel.

48. The electronic device according to claim 41, wherein: The vibrating object includes a display panel including a plurality of pixels configured to display an image, or the vibrating object includes one or more of a vehicle interior material, a vehicle glass window, a building ceiling, a building glass window, a building interior material, an aircraft interior material, and an aircraft glass window.

49. An electronic device according to any one of claims 41 to 48, wherein: The vibration structure comprises: a vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion having an organic material between the plurality of inorganic material portions; a first electrode portion provided at a first surface of the vibration portion; and A second electrode portion is provided at a second surface of the vibration portion different from the first surface.

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