Vibration generating device

Abstract

The vibration generating apparatus includes a display panel configured to display an image, a vibration device disposed at a rear surface of the display panel and configured to vibrate the display panel, a support member at the rear surface of the display panel, and a spacer member between the vibration device and the support member.

Description

[0001] This application is a divisional application of the original application with the application number 202111012290.8 (application date: August 31, 2021, and the invention name: Vibration generating device and vibration device) for an invention patent. TECHNICAL FIELD

[0002] The present disclosure relates to a vibration device and a vibration generating device including the same. BACKGROUND

[0003] In a display device, a display panel displays an image, and a separate speaker should be installed to provide sound. When the speaker is located in the display device or device, the speaker occupies space, and as a result, the design and spatial arrangement of the display device or device are limited.

[0004] However, because sound output from the speaker can propagate to the backward or downward direction of the display device, sound quality can be degraded due to interference between sound reflected from the wall and the floor. Therefore, it can be difficult to deliver accurate sound, and the immersion experience of the viewer is reduced. SUMMARY

[0005] The inventor has recognized the above problems and has conducted various experiments to implement a vibration device for improving sound quality and sound pressure characteristics. Therefore, through various experiments, the inventor invented a device having a new structure including a vibration device for improving sound quality and / or sound pressure characteristics and sound pressure level characteristics.

[0006] Therefore, embodiments of the present disclosure are directed to a vibration device and a device including the same, which substantially obviate one or more problems due to limitations and disadvantages of the related art.

[0007] An aspect of the present disclosure is to provide a vibration device and a device including the same, which vibrates a display panel to generate sound and has enhanced sound characteristics and / or sound pressure level characteristics.

[0008] Additional features and aspects will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description, or can be learned by practice of the invention concepts presented herein. The features and aspects of the invention concepts can be realized and attained by means of the instrumentalities particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0009] To achieve these and other aspects of the present inventive concepts, as embodied and broadly described herein, a device includes a display panel configured to display an image, a vibration device disposed at a rear surface of the display panel and configured to vibrate the display panel, a support member at the rear surface of the display panel, and a spacer member between the vibration device and the support member.

[0010] In another aspect, a device includes a display panel configured to display an image, a vibration device at a rear surface of the display panel, a plate between the display panel and the vibration device, a support member disposed at the rear surface of the display panel, and a spacer member between the vibration device and the support member.

[0011] In another aspect, a vibration device includes a plurality of vibration generators stacked to be displaced in the same direction, an adhesive member between the plurality of vibration generators, and a spacer member in the plurality of vibration generators.

[0012] In another aspect, a device includes a vibration member, a vibration device at the vibration member, and a spacer member at the vibration device.

[0013] In another aspect, a device includes a vibration object and a vibration device in the vibration object, the vibration device including a plurality of vibration generators stacked to be displaced in the same direction, an adhesive member between the plurality of vibration generators, and a spacer member at the plurality of vibration generators.

[0014] Note that directional indications are given with respect to a user viewing an image in front of the device, e.g., a rear surface or a front surface. That is, a front surface of a display panel (or vibration member or vibration object) can be a surface having a display area, i.e., a surface on which an image can be displayed. Similarly, a rear surface of a display panel (or vibration member or vibration object) can be a surface opposite the front surface, i.e., a surface facing away from the user. Further, a thickness direction can refer to a direction perpendicular to the front surface and / or the rear surface, and additionally, "spaced apart on a plane parallel to the front surface and / or the rear surface of the display panel" can mean a distance disposed between two elements parallel to the front surface and / or the rear surface of the display panel (or vibration member or vibration object).

[0015] A device according to embodiments of the present disclosure can vibrate a display panel to produce sound, and can output sound having enhanced sound characteristics and / or enhanced sound pressure level characteristics in a forward direction of the display panel.

[0016] According to embodiments of the present disclosure, a spacer member can be provided, thereby implementing a device having enhanced sound output characteristics.

[0017] In the device according to the embodiment of the disclosure, as the amplitude displacement of the vibration plate increases, the midrange, bass, and / or mid-bass band characteristics of the sound generated based on the displacement of the vibration plate can be enhanced.

[0018] In the vibration device according to the embodiment of the disclosure, the midrange, bass, and / or mid-bass band characteristics of the sound generated based on the displacement of the vibration plate can be enhanced.

[0019] Other systems, methods, features, and advantages will be, or will become, apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features, and advantages be included within this description, be within the scope of the disclosure, and be protected by the following claims. Nothing in this section should be taken as a limitation on the claims. Additional aspects and advantages are discussed below in conjunction with the embodiments of the disclosure.

[0020] It is to be understood that both the foregoing general description and the following detailed description of the disclosure are exemplary and explanatory and are intended to provide further explanation of the subject application concept.

[0021] APPENDIX 1. A vibration generating device comprising:

[0022] a display panel configured to display an image;

[0023] a vibration device disposed at a rear surface of the display panel and configured to vibrate the display panel;

[0024] a support member located at the rear surface of the display panel; and

[0025] a spacer member located between the vibration device and the support member.

[0026] APPENDIX 2. The vibration generating device according to APPENDIX 1, further comprising:

[0027] a connection member disposed between the display panel and the vibration device.

[0028] APPENDIX 3. The vibration generating device according to APPENDIX 1, wherein,

[0029] the vibration device comprises a plurality of vibration generators, and

[0030] each of the plurality of vibration generators is configured to vibrate in the same direction.

[0031] APPENDIX 4. The vibration generating device according to APPENDIX 2, further comprising:

[0032] an adhesive member located between the plurality of vibration generators.

[0033] Note 5. The vibration generation apparatus according to Note 2, wherein each of the plurality of vibration generators has the same size.

[0034] Note 6. The vibration generation apparatus according to Note 2, wherein end portions of each of the plurality of vibration generators are aligned in a direction perpendicular to the front surface of the display panel.

[0035] Note 7. The vibration generation apparatus according to Note 2, wherein each of the plurality of vibration generators further includes a plurality of vibration structures arranged along a first direction and a second direction intersecting the first direction.

[0036] Note 8. The vibration generation apparatus according to Note 2, wherein

[0037] each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0038] the spacer member is provided between the plurality of vibration structures.

[0039] Note 9. The vibration generation apparatus according to Note 2, wherein

[0040] each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0041] the spacer member is provided at each of the plurality of vibration structures.

[0042] Note 10. The vibration generation apparatus according to Note 2, wherein

[0043] each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0044] the spacer member is provided on each of the plurality of vibration structures and between adjacent spacer members provided at each of the plurality of vibration structures.

[0045] Note 11. The vibration generation apparatus according to Note 1, wherein

[0046] the vibration apparatus includes at least two or more vibration structures, and

[0047] the spacer member is provided between the at least two or more vibration structures.

[0048] Note 12. The vibration generation apparatus according to Note 1, wherein

[0049] The vibration device includes at least two or more vibration structures, and

[0050] The cushion member is disposed at each of the plurality of vibration structures and between adjacent cushion members disposed at each of the plurality of vibration structures.

[0051] Note 13. The vibration generating apparatus according to Note 1, wherein a size of the cushion member is equal to or smaller than a size of the vibration device.

[0052] Note 14. The vibration generating apparatus according to Note 3, wherein,

[0053] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0054] The cushion member overlaps at least one of the plurality of vibration structures.

[0055] Note 15. The vibration generating apparatus according to Note 3, wherein,

[0056] Each of the plurality of vibration generators further includes a plurality of vibration structures,

[0057] The cushion member is provided in plurality,

[0058] One of the cushion members overlaps at least two or more of the vibration structures.

[0059] Note 16. The vibration generating apparatus according to Note 3, wherein,

[0060] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0061] The cushion member is provided adjacent to the plurality of vibration structures.

[0062] Note 17. The vibration generating apparatus according to Note 3, wherein,

[0063] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0064] The cushion member overlaps two adjacent vibration structures.

[0065] Note 18. The vibration generating apparatus according to Note 1, wherein,

[0066] The vibration device includes at least two or more vibration structures, and

[0067] The cushion member is disposed at each of the at least two or more vibration structures.

[0068] Clause 19. The vibration generation apparatus of clause 1, wherein

[0069] The vibration device includes at least two or more vibration structures, and

[0070] The cushion member is disposed at each of the at least two or more vibration structures, and between adjacent cushion members disposed at each of the at least two or more vibration structures.

[0071] Clause 20. The vibration generation apparatus of clause 1, further comprising:

[0072] a plate between the display panel and the vibration device.

[0073] Clause 21. The vibration generation apparatus of clause 17, further comprising:

[0074] a plate connecting member configured to connect the plate to a rear surface of the display panel.

[0075] Clause 22. The vibration generation apparatus of any one of clauses 1 to 21, wherein the vibration device includes:

[0076] a vibration structure;

[0077] a first protection member disposed at a first surface of the vibration structure; and

[0078] a second protection member disposed at a second surface of the vibration structure different from the first surface.

[0079] Clause 23. The vibration generation apparatus of clause 22, wherein the vibration device further includes:

[0080] a first adhesive layer disposed between the vibration structure and the first protection member; and

[0081] a second adhesive layer disposed between the vibration structure and the second protection member.

[0082] Clause 24. The vibration generation apparatus of clause 22, wherein the vibration structure includes:

[0083] a vibration portion;

[0084] a first electrode portion disposed between the vibration portion and the first protection member; and

[0085] a second electrode portion provided between the vibration portion and the second protection member.

[0086] Paragraph 25. The vibration generating apparatus according to Paragraph 24, wherein the vibration portion includes a plurality of first portions and a second portion provided between the plurality of first portions.

[0087] Paragraph 26. A vibration generating apparatus comprising:

[0088] a display panel configured to display an image;

[0089] a vibration device at a rear surface of the display panel;

[0090] a plate between the display panel and the vibration device;

[0091] a support member provided at a rear surface of the display panel; and

[0092] a spacer member between the vibration device and the support member.

[0093] Paragraph 27. The vibration generating apparatus according to Paragraph 26, further comprising:

[0094] a connection member provided between the display panel and the vibration device.

[0095] Paragraph 28. The vibration generating apparatus according to Paragraph 26, wherein,

[0096] the display panel includes a first region and a second region, and

[0097] the vibration device includes a first vibration means provided at the first region and a second vibration means provided at the second region.

[0098] Paragraph 29. The vibration generating apparatus according to Paragraph 28, further comprising:

[0099] a partition provided between a rear surface of the display panel and the support member and between the first region and the second region.

[0100] Paragraph 30. The vibration generating apparatus according to Paragraph 28, wherein the spacer member is provided at each of the first vibration means and the second vibration means.

[0101] Paragraph 31. The vibration generating apparatus according to Paragraph 28, wherein the vibration device further includes:

[0102] a third vibration device disposed at the first region; and

[0103] a fourth vibration device disposed at the second region.

[0104] Paragraph 32. The vibration generating apparatus according to Paragraph 31, wherein

[0105] the first vibration device and the third vibration device are disposed in parallel or staggered with each other in the first region, and

[0106] the second vibration device and the fourth vibration device are disposed in parallel or staggered with each other in the second region.

[0107] Paragraph 33. The vibration generating apparatus according to Paragraph 31, wherein the pad member is disposed at each of the third vibration device and the fourth vibration device.

[0108] Paragraph 34. The vibration generating apparatus according to any one of Paragraphs 26 to 33, wherein the vibration device comprises:

[0109] a vibration structure;

[0110] a first protection member disposed at a first surface of the vibration structure; and

[0111] a second protection member disposed at a second surface of the vibration structure different from the first surface.

[0112] Paragraph 35. The vibration generating apparatus according to Paragraph 34, wherein the vibration device further comprises:

[0113] a first adhesive layer disposed between the vibration structure and the first protection member; and

[0114] a second adhesive layer disposed between the vibration structure and the second protection member.

[0115] Paragraph 36. The vibration generating apparatus according to Paragraph 34, further comprising:

[0116] a first vibration drive line configured to deliver a first vibration drive signal to the vibration structure; and

[0117] a second vibration drive line configured to deliver a second vibration drive signal to the vibration structure.

[0118] Note 37. The vibration generation device according to Note 34, wherein the vibration structure includes:

[0119] a vibration portion;

[0120] a first electrode portion provided between the vibration portion and the first protective member; and

[0121] a second electrode portion provided between the vibration portion and the second protective member.

[0122] Note 38. The vibration generation device according to Note 37, wherein the vibration portion includes a plurality of first portions and a second portion provided between the plurality of first portions.

[0123] Note 39. The vibration generation device according to Note 37, further comprising:

[0124] a first power supply line connected to one of the first electrode portion and the second electrode portion; and

[0125] a second power supply line connected to the other of the first electrode portion and the second electrode portion, and spaced apart from the first power supply line in a plane parallel to front and rear surfaces of the display panel.

[0126] Note 40. The vibration generation device according to Note 28, wherein each of the first vibration means and the second vibration means includes:

[0127] a plurality of vibration generators; and

[0128] an adhesive member between the plurality of vibration generators.

[0129] Note 41. The vibration generation device according to Note 28, wherein the vibration device further includes:

[0130] a third vibration means provided at the first region; and

[0131] a fourth vibration means provided at the second region, and

[0132] wherein each of the third vibration means and the fourth vibration means includes:

[0133] a plurality of vibration generators; and

[0134] an adhesive member between the plurality of vibration generators.

[0135] Paragraph 42. The vibration generation device according to Paragraph 40 or 41, wherein each of the plurality of vibration generators includes:

[0136] a vibration portion including a plurality of inorganic material portions having piezoelectric properties and an organic material portion positioned between the plurality of inorganic material portions;

[0137] a first electrode portion provided at a first surface of the vibration portion; and

[0138] a second electrode portion provided at a second surface of the vibration portion different from the first surface.

[0139] Paragraph 43. The vibration generation device according to Paragraph 42, further comprising:

[0140] a first power supply line connected to the first electrode portion; and

[0141] a second power supply line connected to the second electrode portion,

[0142] wherein the second power supply line is spaced apart from the first power supply line in a plane parallel to a front surface and a rear surface of the display panel.

[0143] Paragraph 44. The vibration generation device according to Paragraph 42, wherein,

[0144] some of the plurality of vibration generators overlap in a direction perpendicular to a front surface of the display panel,

[0145] an inorganic material portion of a vibration generator provided closer to the front surface of the display panel overlaps an inorganic material portion of another vibration generator provided less close to the front surface of the display panel, and / or

[0146] an organic material portion of the vibration generator provided closer to the front surface of the display panel overlaps an organic material portion of the another vibration generator provided less close to the front surface of the display panel.

[0147] Paragraph 45. The vibration generation device according to Paragraph 42, further comprising:

[0148] a first power supply line and a second power supply line,

[0149] wherein some of the plurality of vibration generators overlap in a direction perpendicular to a front surface of the display panel,

[0150] wherein the first electrode portion disposed closer to the front surface of the display panel and the first electrode portion disposed less close to the front surface of the display panel are connected to the first power line, and

[0151] wherein the second electrode portion disposed closer to the front surface of the display panel and the second electrode portion disposed less close to the front surface of the display panel are connected to the second power line.

[0152] Paragraph 46. The vibration generating apparatus according to Paragraph 40 or 41, wherein the adhesive member includes a first adhesive layer and a second adhesive layer, and each of the plurality of vibration generators includes:

[0153] a plurality of vibration structures arranged along a first direction and a second direction intersecting the first direction;

[0154] a first protective member disposed at a first surface of each of the plurality of vibration structures by the first adhesive layer; and

[0155] a second protective member disposed at a second surface of each of the plurality of vibration structures by the second adhesive layer.

[0156] Paragraph 47. The vibration generating apparatus according to Paragraph 46, wherein the plurality of vibration structures are arranged at an interval of 0.1 mm or more and less than 5 mm.

[0157] Paragraph 48. The vibration generating apparatus according to Paragraph 46, further comprising:

[0158] a first vibration drive line configured to transmit a first vibration drive signal to the plurality of vibration structures; and

[0159] a second vibration drive line configured to transmit a second vibration drive signal to the plurality of vibration structures.

[0160] Paragraph 49. The vibration generating apparatus according to Paragraph 46, wherein the spacer member is disposed between the plurality of vibration structures included in each of the plurality of vibration generators.

[0161] Paragraph 50. The vibration generating apparatus according to Paragraph 46, wherein the spacer member is disposed at the plurality of vibration structures included in each of the plurality of vibration generators.

[0162] Paragraph 51. The vibration generation device according to Paragraph 46, wherein the spacer member is provided at each of the plurality of vibration structures included in each of the plurality of vibration generators and between adjacent spacer members provided on each of the plurality of vibration structures.

[0163] Paragraph 52. The vibration generation device according to Paragraph 26, wherein,

[0164] the vibration device further includes a plurality of vibration structures, and

[0165] the spacer member is provided adjacent to the plurality of vibration structures.

[0166] Paragraph 53. The vibration generation device according to Paragraph 26, wherein,

[0167] the vibration device further includes a plurality of vibration structures, and

[0168] the spacer member overlaps two adjacent vibration structures.

[0169] Paragraph 54. The vibration generation device according to Paragraph 26, wherein,

[0170] the vibration device further includes a plurality of vibration structures, and

[0171] the spacer member overlaps at least one of the plurality of vibration structures.

[0172] Paragraph 55. The vibration generation device according to Paragraph 26, wherein,

[0173] the vibration device further includes a plurality of vibration structures, and

[0174] the spacer member is provided in plurality, and

[0175] one of the spacer members overlaps at least two or more of the vibration structures.

[0176] Paragraph 56. The vibration generation device according to Paragraph 46, wherein each of the plurality of vibration structures includes:

[0177] a vibration portion;

[0178] a first electrode portion provided between the vibration portion and the first protective member; and

[0179] a second electrode portion provided between the vibration portion and the second protective member.

[0180] Paragraph 57. The vibration generation device according to Paragraph 56, wherein the vibration portion includes:

[0181] a plurality of inorganic material portions; and

[0182] an organic material portion, the organic material portion being located between the plurality of inorganic material portions.

[0183] Note 58. The vibration generation device according to Note 46, wherein each of the plurality of vibration generators includes:

[0184] a vibration portion;

[0185] a first electrode portion provided at a first surface of the vibration portion; and

[0186] a second electrode portion provided at a second surface of the vibration portion different from the first surface, and

[0187] wherein the first electrode portion of each of the plurality of vibration generators is provided closer to the display panel than the second electrode portion.

[0188] Note 59. The vibration generation device according to Note 58, further comprising:

[0189] a vibration drive circuit including a plurality of amplifiers connected to the plurality of vibration generators, respectively,

[0190] wherein the plurality of vibration generators include a first group and a second group,

[0191] wherein the plurality of amplifiers include a first amplifier group and a second amplifier group,

[0192] wherein an amplifier of the first amplifier group includes a first output terminal connected to the first electrode portion of the vibration generator of the first group and a second output terminal connected to the second electrode portion of the vibration generator of the first group, and

[0193] wherein an 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.

[0194] Note 60. The vibration generation device according to Note 46, wherein each of the plurality of vibration generators includes:

[0195] a vibration portion;

[0196] a first electrode portion provided at a first surface of the vibration portion; and

[0197] a second electrode portion disposed at a second surface of the vibration portion different from the first surface,

[0198] wherein the plurality of vibration generators includes a first group and a second group,

[0199] wherein, in the vibration generators of the first group, the first electrode portion is disposed closer to the display panel than the second electrode portion, and

[0200] wherein, in the vibration generators of the second group, the second electrode portion is disposed closer to the display panel than the first electrode portion.

[0201] Note 61. The vibration generation apparatus according to Note 60, further comprising:

[0202] a vibration drive circuit including a plurality of amplifiers connected to the plurality of vibration generators, respectively,

[0203] wherein each of the plurality of amplifiers includes:

[0204] a first output terminal connected to the first electrode portion of a corresponding vibration generator of the plurality of vibration generators; and

[0205] a second output terminal connected to the second electrode portion of the corresponding vibration generator of the plurality of vibration generators.

[0206] Note 62. A vibration apparatus comprising:

[0207] a plurality of vibration generators stacked with each other and configured to vibrate in the same direction;

[0208] an adhesive member between the plurality of vibration generators; and

[0209] a spacer member at the plurality of vibration generators.

[0210] Note 63. The vibration apparatus according to Note 62, wherein each of the plurality of vibration generators has the same size.

[0211] Note 64. The vibration apparatus according to Note 62, wherein end portions of each of the plurality of vibration generators are aligned in a direction perpendicular to a front surface of the vibration generator.

[0212] Note 65. The vibration apparatus according to Note 62, further comprising:

[0213] a plate disposed at an uppermost vibration generator of the plurality of vibration generators,

[0214] wherein the cushion member is disposed at a lowermost vibration generator of the plurality of vibration generators.

[0215] Note 66. The vibration device according to Note 65, wherein the plate and each of the plurality of vibration generators have the same size.

[0216] Note 67. The vibration device according to Note 62, further comprising:

[0217] another cushion member disposed between adjacent cushion members at the plurality of vibration generators.

[0218] Note 68. A vibration generating device comprising:

[0219] a vibration member;

[0220] a vibration device at the vibration member; and

[0221] a cushion member at the vibration device.

[0222] Note 69. The vibration generating device according to Note 68, wherein,

[0223] the vibration member includes a plate, and

[0224] the plate includes a metal material, or a single non-metal material or a composite non-metal material including one or more of wood, plastic, glass, cloth, paper, and leather.

[0225] Note 70. The vibration generating device according to Note 69, wherein each of the vibration member and the plate has the same size.

[0226] Note 71. The vibration generating device according to Note 68, wherein the vibration device includes a plurality of vibration generators stacked with each other and configured to vibrate in the same direction.

[0227] Note 72. The vibration generating device according to Note 71, wherein,

[0228] each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0229] the cushion member is disposed at each of the plurality of vibration structures.

[0230] Note 73. The vibration generating device according to Note 71, wherein,

[0231] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0232] The spacer member is disposed between the plurality of vibration structures.

[0233] Note 74. The vibration generation apparatus according to Note 71, in which

[0234] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0235] The spacer member is disposed at each of the plurality of vibration structures and between adjacent spacer members disposed at each of the plurality of vibration structures.

[0236] Note 75. The vibration generation apparatus according to Note 71, in which

[0237] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0238] The spacer member is at each of the plurality of vibration structures included in the lowermost vibration generator among the plurality of vibration generators.

[0239] Note 76. The vibration generation apparatus according to Note 71, in which

[0240] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0241] The spacer member is between the plurality of vibration structures included in the lowermost vibration generator among the plurality of vibration generators.

[0242] Note 77. The vibration generation apparatus according to Note 71, in which

[0243] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0244] The spacer member is at each of the plurality of vibration structures included in the lowermost vibration generator among the plurality of vibration generators and is disposed at each of the plurality of vibration structures.

[0245] Note 78. The vibration generation apparatus according to Note 71, in which

[0246] Each of the plurality of vibration generators further includes a plurality of vibration structures, and

[0247] The spacer member is disposed adjacent to the plurality of vibration structures.

[0248] Paragraph 79. The vibration generating apparatus according to Paragraph 68, wherein

[0249] the vibration apparatus includes at least two or more vibration structures, and

[0250] the cushion member overlaps with the at least two or more vibration structures.

[0251] Paragraph 80. The vibration generating apparatus according to Paragraph 68, wherein

[0252] the vibration apparatus includes at least two or more vibration structures, and

[0253] the cushion member is provided at each of the at least two or more vibration structures and between adjacent cushion members provided at each of the at least two or more vibration structures.

[0254] Paragraph 81. The vibration generating apparatus according to Paragraph 68, wherein

[0255] the vibration apparatus includes at least two or more vibration structures, and

[0256] the cushion member overlaps with at least two or more of the plurality of vibration structures and is provided between adjacent cushion members provided at each of the plurality of vibration structures.

[0257] Paragraph 82. The vibration generating apparatus according to Paragraph 68, wherein

[0258] the vibration apparatus includes at least two or more vibration structures, and

[0259] the cushion member overlaps with at least one of the plurality of vibration structures.

[0260] Paragraph 83. The vibration generating apparatus according to Paragraph 68, wherein

[0261] the vibration apparatus includes at least two or more vibration structures,

[0262] the cushion members are provided in plurality, and

[0263] one of the cushion members overlaps with at least two or more of the vibration structures.

[0264] Paragraph 84. The vibration generating apparatus according to Paragraph 68, wherein the vibration member includes a display panel including a plurality of pixels configured to display an image, or the vibration member includes one or more non-display panels among a light emitting diode lighting panel, an organic light emitting lighting panel, and an inorganic light emitting lighting panel.

[0265] Paragraph 85. The vibration generating apparatus according to Paragraph 68, wherein the vibration member includes a display panel including pixels configured to display an image, or the vibration member includes one or more of a screen panel on which an image is projected from a display apparatus, an illumination panel, a signage panel, a vehicle interior material, a vehicle glazing, a vehicle exterior material, a building roof material, a building interior material, a building glazing, an aircraft interior material, an aircraft glazing, and a mirror.

[0266] Paragraph 86. The vibration generating apparatus according to any one of Paragraphs 71 to 78, wherein each of the plurality of vibration generators includes:

[0267] a vibration portion including a plurality of inorganic material portions having piezoelectric properties and an organic material portion located between the plurality of inorganic material portions;

[0268] a first electrode portion provided at a first surface of the vibration portion; and

[0269] a second electrode portion provided at a second surface of the vibration portion different from the first surface.

[0270] Paragraph 87. The vibration generating apparatus according to Paragraph 86, further comprising:

[0271] a first power supply line and a second power supply line,

[0272] wherein some of the plurality of vibration generators overlap in a direction perpendicular to a front surface of the vibration member,

[0273] wherein the first electrode portions of the vibration generators provided closer to the front surface of the vibration member and the first electrode portions of the vibration generators provided less close to the front surface of the vibration member are connected to the first power supply line, and

[0274] wherein the second electrode portions of the vibration generators provided closer to the front surface of the vibration member and the second electrode portions of the vibration generators provided less close to the front surface of the vibration member are connected to the second power supply line.

[0275] Paragraph 88. The vibration generating apparatus according to Paragraph 87, wherein the first power supply line connected to the first electrode portions of the vibration generators provided closer to the front surface of the vibration member does not overlap the second power supply line connected to the second electrode portions of the vibration generators provided closer to the front surface of the vibration member.

[0276] Note 89. The vibration generation device according to Note 87, wherein the first power supply line connected to the first electrode portion of the vibration generator disposed less proximally to the front surface of the vibration member does not overlap with the second power supply line connected to the second electrode portion of the vibration generator disposed less proximally to the front surface of the vibration member.

[0277] Note 90. The vibration generation device according to any one of Notes 68 to 85, wherein the vibration device comprises:

[0278] a vibration portion including a plurality of inorganic material portions having piezoelectric properties and an organic material portion positioned between the plurality of inorganic material portions;

[0279] a first electrode portion disposed at a first surface of the vibration portion; and

[0280] a second electrode portion disposed at a second surface of the vibration portion different from the first surface.

[0281] Note 91. The vibration generation device according to Note 90, further comprising:

[0282] a first power supply line connected to the first electrode portion; and

[0283] a second power supply line connected to the second electrode portion,

[0284] wherein the second power supply line is spaced apart from the first power supply line in a plane parallel to the front surface and the back surface of the vibration member.

[0285] Note 92. The vibration generation device according to any one of Notes 68 to 85, wherein the vibration device comprises:

[0286] at least two or more vibration structures;

[0287] a first electrode portion on a first surface of one of the at least two or more vibration structures and a second electrode portion on a surface different from the first surface;

[0288] a third electrode portion on a first surface of another of the at least two or more vibration structures and a fourth electrode portion on a surface different from the first surface; and

[0289] a first power supply line connected to the first electrode portion and the third electrode portion and a second power supply line connected to the second electrode portion and the fourth electrode portion. BRIEF DESCRIPTION OF DRAWINGS

[0290] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0291] FIG. 1 An apparatus according to an embodiment of the present disclosure is shown.

[0292] FIG. 2 It is along FIG. 1 The cross-sectional view shown is taken by line I-I'.

[0293] FIG. 3 This is a cross-sectional view of a vibration device according to an embodiment of the present disclosure.

[0294] FIG. 4 It is along FIG. 3 The cross-sectional view taken by line II-II' shown.

[0295] FIG. 5 A vibration drive circuit according to an embodiment of the present disclosure is shown.

[0296] FIG. 6A The displacement of a vibration generator according to an embodiment of the present disclosure is shown.

[0297] FIG. 6B The displacement of a vibration device according to an embodiment of the present disclosure is shown.

[0298] FIG. 7 A vibration device according to another embodiment of the present disclosure is shown.

[0299] FIG. 8 It is along FIG. 7 The cross-sectional view taken by line III-III' shown.

[0300] FIG. 9 A vibration drive circuit according to another embodiment of the present disclosure is shown.

[0301] FIG. 10 A vibration device according to another embodiment of the present disclosure is shown.

[0302] FIG. 11 It shows FIG. 10 The vibrating part is shown.

[0303] FIG. 12A to FIG. 12C It is along FIG. 10 The cross-sectional view shown is taken from line IV-IV'.

[0304] FIG. 13 A vibration device according to another embodiment of the present disclosure is shown.

[0305] FIG. 14 A vibration device according to another embodiment of the present disclosure is shown.

[0306] FIG. 15 A vibration device according to another embodiment of the present disclosure is shown.

[0307] FIG. 16A to FIG. 16E It is along FIG. 15 The cross-sectional view shown is taken from line V-V'.

[0308] FIG. 17 An apparatus according to another embodiment of the present disclosure is shown.

[0309] FIG. 18 The display panel is shown according to FIG. 17 The amplitude displacement of the plate thickness is shown.

[0310] FIG. 19 A vibration device according to another embodiment of the present disclosure is shown.

[0311] FIG. 20 A vibration device according to another embodiment of the present disclosure is shown.

[0312] FIG. 21 It is along FIG. 20 The cross-sectional view shown is taken from line VI-VI'.

[0313] FIG. 22 A vibration device according to another embodiment of the present disclosure is shown.

[0314] FIG. 23 It is along FIG. 22 The cross-sectional view taken by line VII-VII' shown.

[0315] FIG. 24 A vibration device according to another embodiment of the present disclosure is shown.

[0316] FIG. 25 It is along FIG. 24 The cross-sectional view taken by line VIII-VIII' shown.

[0317] FIG. 26 A vibration device according to another embodiment of the present disclosure is shown.

[0318] FIG. 27 It is along FIG. 26 The cross-sectional view shown is taken by line IX-IX'.

[0319] FIG. 28 An apparatus according to another embodiment of the present disclosure is shown.

[0320] FIG. 29 It is along FIG. 28a cross-sectional view taken along the line X-X' shown in FIG. 1.

[0321] FIG. 30 An apparatus according to another embodiment of the disclosure is illustrated.

[0322] FIG. 31 An apparatus according to another embodiment of the disclosure is illustrated.

[0323] FIG. 32 is along FIG. 1 Another cross-sectional view taken along the line I-I' shown in FIG. 1.

[0324] FIG. 33 An apparatus according to another embodiment of the disclosure is illustrated.

[0325] FIG. 34 is along FIG. 33 A cross-sectional view taken along the line XI-XI' shown in FIG. 1.

[0326] FIG. 35 is along FIG. 33 Another cross-sectional view taken along the line XI-XI' shown in FIG. 1.

[0327] FIG. 36 An apparatus according to another embodiment of the disclosure is illustrated.

[0328] FIG. 37 An apparatus according to another embodiment of the disclosure is illustrated.

[0329] FIG. 38 An apparatus according to another embodiment of the disclosure is illustrated.

[0330] FIG. 39 Sound output characteristics of each of a display apparatus according to an embodiment of the disclosure and a display apparatus according to an experimental example are illustrated.

[0331] FIG. 40 Sound output characteristics of a display apparatus according to an embodiment of the disclosure are illustrated.

[0332] FIG. 41 Sound output characteristics of a display apparatus according to an embodiment of the disclosure are illustrated.

[0333] FIG. 42 Sound output characteristics of a display apparatus according to an embodiment of the disclosure are illustrated. DETAILED DESCRIPTION

[0334] The shapes, sizes, ratios, angles, and numbers disclosed in the drawings for describing embodiments of the disclosure are merely examples and thus the disclosure is not limited to the illustrated details. Like reference numerals refer to like elements throughout the specification. In the following description, detailed descriptions of functionally known or configured related functions will be omitted when it is determined that such detailed descriptions will unnecessarily obscure the focus of the disclosure. When "include", "have", and "comprise" are used in the specification, another part can be added unless "only" is used. Unless otherwise indicated, a singular form of a term can include a plural form.

[0335] In interpreting elements, the elements are interpreted to include an error or tolerance range, although there is no explicit description of the error or tolerance range.

[0336] In describing positional relationships, for example, when a positional relationship between two components is described as, for example, "on", "above", "below", and "near", unless more restrictive terms such as "only" or "directly" are used, one or more other components can be disposed between the two components.

[0337] In describing temporal relationships, for example, when a temporal sequence is described as, for example, "after", "subsequently", "next", and "before", unless more restrictive terms such as "only", "immediately", or "directly" are used, discontinuous cases can be included.

[0338] It should be understood that although the terms "first", "second", and the like can be used herein to describe various elements, such elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0339] In describing elements of the disclosure, the terms "first", "second", "A", "B", "(a)", "(b)", and the like can be used. These terms are intended to distinguish corresponding elements from other elements and the basis, order, or number of the corresponding elements should not be limited by these terms. Unless otherwise stated, the expression that one element is "connected", "coupled", or "attached" to another element or layer means that the element or layer can be directly connected or attached to another element or layer and can be indirectly connected or attached to another element or layer and "provided with" one or more intermediate elements or layers between the elements or layers.

[0340] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, a meaning of "at least one of a first item, a second item, and a third item" indicates all of the combinations, including only a first item, only a second item, only a third item, as well as any combination of a first item, a second item, and a third item.

[0341] In the disclosure, examples of the display apparatus can include a narrow display apparatus such as an organic light emitting display (OLED) module or a liquid crystal module (LCM) including a display panel and a driver for driving the display panel. In addition, examples of the display apparatus can include a kit (or a kit apparatus) or a kit electronic apparatus as a complete product (or a final product) including the LCM or the OLED module, for example, a notebook computer, a TV, a computer monitor, a machine including an automotive apparatus or other type of apparatus for a vehicle, or a mobile electronic apparatus such as a smart phone or an electronic tablet.

[0342] Accordingly, in the disclosure, examples of the display apparatus can include a narrow display apparatus itself such as the LCM or the OLED module, and a kit apparatus as a final consumer apparatus or an application product including the LCM or the OLED module.

[0343] In some embodiments, the LCM or the OLED module including the display panel and the driver can be referred to as a narrow display apparatus, and the electronic apparatus as a final product including the LCM or the OLED module can be referred to as a kit apparatus. For example, the narrow display apparatus can 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 kit apparatus can further include a kit PCB which is a kit controller electrically connected to the source PCB to overall control the kit apparatus.

[0344] The display panel applied to the present embodiment can 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 embodiments of the disclosure are not limited to a specific display panel that vibrates by a sound generating apparatus according to the present embodiment to output sound. In addition, a shape or size of the display panel applied to the display apparatus according to the present embodiment is not limited.

[0345] For example, when the display panel is a liquid crystal display panel, the display panel can include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively disposed in a plurality of pixel regions defined by the intersection points of the gate lines and the data lines. Further, the display panel can include an array substrate including a thin film transistor (TFT) which is a switching element for adjusting light 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.

[0346] Further, when the display panel is an organic light emitting display panel, the display panel can include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively disposed in a plurality of pixel regions defined by the intersection points of the gate lines and the data lines. Further, the display panel can include an array substrate including a TFT which is an element for selectively applying a voltage to each of the pixels, an organic light emitting device layer on the array substrate, and an encapsulation substrate disposed at the array substrate to cover the organic light emitting device layer. The encapsulation substrate can protect the TFT and the organic light emitting device layer from external impact, and can prevent moisture or oxygen from penetrating into the organic light emitting device layer. Further, a layer disposed on the array substrate can include an inorganic light emitting layer (e.g., a nanomaterial layer, a quantum dot, etc.). As another embodiment of the disclosure, a layer disposed on the array substrate can include a micro light emitting diode.

[0347] The display panel can further include a backing such as a metal plate attached to the display panel. However, the present embodiment is not limited to a metal plate, and the display panel can include another structure.

[0348] Features of various embodiments of the disclosure can be partially or wholly coupled or combined with each other, and can interoperate and be technically driven in various ways as can be sufficiently understood by those skilled in the art. Embodiments of the disclosure can be executed independently of each other, or can be executed together in a dependent relationship.

[0349] Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings. For the sake of convenience in description, the ratio of each element shown in the drawings is different from the actual ratio, and thus is not limited to the ratio shown in the drawings.

[0350] In a case in which a speaker is provided in a display device to implement sound in the display device, the speaker can be implemented as a film type, and thus, the thickness of the display device can be thin. The film type vibration device can be manufactured to have a large area, and can be applied to a display device having a large area. However, because the piezoelectric characteristics of the film type vibration device are low, it can be difficult to apply the film type vibration device to a large area due to low vibration. When ceramic is used to enhance the piezoelectric characteristics, the durability of the film type vibration device can be weak, and the size of the ceramic can be limited. When a vibration device including a piezoelectric composite including a piezoelectric ceramic is applied to a display device, because the piezoelectric composite vibrates in a horizontal direction with respect to a left-right direction (for example, a horizontal direction with respect to a left-right direction of the display device), it can not sufficiently vibrate the display device in a vertical (or front-back) direction. Thus, it can be difficult to apply the vibration device to the display device, and it can not be possible to output desired sound to a frontward area in front of the display device. In a case in which a film type piezoelectric element is applied to a display device, there can be a problem in that the sound pressure characteristics are lower than, for example, a speaker of a sonicator. In a case in which a stacked type piezoelectric element in which a plurality of film type piezoelectric elements are stacked as multiple layers is applied to a display, power consumption can increase, and the thickness of the display device can become thick. Further, when one vibration device is provided at a rear surface of a display panel (for example, a rear surface of a mobile device), mono sound can be output, but the inventors have recognized a problem in that it is difficult to output sound including stereo sound. Thus, the vibration device can be further provided at a periphery of the display panel to implement sound including stereo sound, but the inventors have recognized such a problem that it is difficult to place a sonicator in a flexible device in which a bending portion is provided in the display panel, and when a speaker including a piezoelectric ceramic is provided, the piezoelectric ceramic is fragile.

[0351] Thus, the inventors have conducted various experiments for implementing a vibration device that can implement sound including stereo sound, can be applied to a flexible display device or the like, and can vibrate in a vertical direction with respect to a width direction of a display panel. Through the various experiments, the inventors have invented a device including a vibration device having a new structure that can implement sound including stereo sound and can be applied to a flexible device or the like. This will be described in detail below.

[0352] FIG. 1 A device according to an embodiment of the disclosure is illustrated, and FIG. 2 is a cross-sectional view taken along FIG. 1 line I-I' shown in FIG. 1A.

[0353] Referring to FIG. 1 and FIG. 2According to an embodiment of the disclosure, a device can include a vibration member and a vibration device 200 disposed at a rear surface (or back surface) of the vibration member. For example, the vibration member can be a vibration object, a display panel, a vibration plate, or a front member, but embodiments of the disclosure are not limited thereto. Hereinafter, an example in which the vibration member is a display panel will be described.

[0354] The display panel 100 can display an electronic image or a digital image. For example, the display panel 100 can output light to display an image. The display panel 100 can be a curved display panel, or can 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 can be a flexible display panel. For example, the display panel 100 can be a flexible light emitting display panel, a flexible electrophoretic display panel, a flexible electro wetting display panel, a flexible micro light emitting diode display panel, or a flexible quantum dot light emitting display panel, but embodiments of the disclosure are not limited thereto.

[0355] The display panel 100 according to an embodiment of the disclosure can include a display area AA (or an active display area) for displaying an image according to driving of a plurality of pixels. The display panel 100 can further include a non-display area IA (or a non-active display area) surrounding the display area AA, but the terms are not limited thereto.

[0356] The display panel 100 according to an embodiment of the disclosure can include an anode electrode, a cathode electrode, and a light emitting device, and can be configured to display an image in a type such as a top emission type, a bottom emission type, or a dual emission type according to a structure of a pixel array layer including a plurality of pixels. In the top emission type, an image can be displayed by outputting visible light generated from the pixel array layer to a frontward area of a base substrate. In the bottom emission type, an image can be displayed by outputting visible light generated from the pixel array layer to a rearward area of the base substrate.

[0357] The display panel 100 according to an embodiment of the disclosure can include a pixel array part disposed at a substrate. The pixel array part can include a plurality of pixels displaying an image based on a signal provided through a signal line. The signal line can include a gate line, a data line, and a pixel driving power line, etc., but embodiments of the disclosure are not limited thereto.

[0358] Each of the plurality of pixels can include a pixel circuit layer including a driving thin film transistor (TFT) disposed at a pixel area constituted by a plurality of gate lines and / or a plurality of data lines, an anode electrode electrically connected to the driving TFT, a light emitting layer formed on the anode electrode, and a cathode electrode electrically connected to the light emitting layer.

[0359] The driving TFT can be disposed at a transistor region of each pixel region disposed at the substrate. The driving TFT can 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 can include silicon such as amorphous silicon (a-Si), poly silicon (poly-Si), or low temperature poly-Si, or can include an oxide such as indium-gallium-zinc-oxide (IGZO), but embodiments of the present disclosure are not limited thereto.

[0360] The anode electrode can be disposed at the opening region disposed at each pixel region, and can be electrically connected to the driving TFT.

[0361] The light emitting device according to an embodiment of the present disclosure can include an organic light emitting device layer formed above the anode electrode. The organic light emitting device layer can be implemented to emit light having the same color (e.g., white light) for each pixel, or can 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) can be commonly connected to the organic light emitting device layer disposed in each pixel region. For example, the organic light emitting device layer can have a stacked structure including a single structure or two or more structures including the same color for each pixel. As another embodiment of the present disclosure, the organic light emitting device layer can have a stacked structure including two or more structures including one or more different colors for each pixel. The two or more structures including one or more different colors can be configured with one or more of blue, red, yellow-green, and green or a combination thereof, but embodiments of the present disclosure are not limited thereto. Examples of the combination can include blue and red, red and yellow-green, red and green, red / yellow-green / green, etc., but embodiments of the present disclosure are not limited thereto. Furthermore, the present disclosure can 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 can further include a charge generation layer between the two or more structures. The charge generation layer can have a PN junction structure, and can include an N-type charge generation layer and a P-type charge generation layer.

[0362] According to another embodiment of the present disclosure, the light emitting device can 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 can be a light emitting diode implemented in an integrated circuit (IC) or chip type. The micro light emitting diode device can include a first terminal electrically connected to the anode electrode and a second terminal electrically connected to the cathode electrode. The cathode electrode can be commonly connected to the second terminal of the micro light emitting diode device disposed in each pixel region.

[0363] The encapsulation portion can be formed on the substrate to surround the pixel array portion, thereby preventing oxygen or moisture from permeating into the light emitting device layer of the pixel array portion. The encapsulation portion according to the embodiment of the disclosure can be formed as a multi-layer structure in which an organic material layer and an inorganic material layer are alternately stacked, but the term is not limited thereto. The inorganic material layer can prevent oxygen or moisture from permeating into the light emitting device layer of the pixel array portion. The organic material layer can be formed to have a relatively thicker thickness than that of the inorganic material layer to cover particles occurring in a manufacturing process. For example, the encapsulation portion can 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 can be a particle covering layer. The touch panel can be disposed on the encapsulation portion, or can be disposed at a rear surface of the pixel array portion.

[0364] The display panel 100 according to the embodiment of the disclosure can include a first substrate, a second substrate, and a liquid crystal layer. The first substrate can be an upper substrate or a thin film transistor (TFT) array substrate. For example, the first substrate can include a pixel array (or a display portion or a display area) including a plurality of pixels respectively disposed in a plurality of pixel regions defined by intersections between a plurality of gate lines and / or a plurality of data lines. Each of the plurality of pixels can include a TFT connected with the gate line and / or the data line, a pixel electrode connected with the TFT, and a common electrode disposed adjacent to the pixel electrode and provided with a common voltage.

[0365] The first substrate can 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).

[0366] The pad portion can supply a signal provided from the outside to the pixel array and / or the gate driving circuit. For example, the pad portion can include a plurality of data pads connected with the plurality of data lines through a plurality of data link lines and / or a plurality of gate input pads connected with the gate driving circuit through a gate control signal line. For example, the size of the first substrate can be greater than that of the second substrate, but the embodiment of the disclosure is not limited thereto.

[0367] The gate driving circuit according to the embodiment of the disclosure can be embedded (or integrated) into the second periphery of the first substrate to be connected to the plurality of gate lines. For example, the gate driving circuit can be implemented with a shift register including transistors formed through the same process as the TFTs disposed in the pixel regions. According to another embodiment of the disclosure, the gate driving circuit can be implemented as an integrated circuit (IC) and can be disposed in a panel driving circuit without being embedded into the first substrate.

[0368] The second substrate can be a lower substrate or a color filter array substrate. For example, the second substrate can include a pixel pattern (or a pixel definition pattern) including an opening region overlapping the pixel region formed in the first substrate and a color filter layer formed at the opening region. The second substrate can have a size smaller than the first substrate, but embodiments of the present disclosure are not limited thereto. For example, the second substrate can overlap a remaining portion of the upper substrate except for the first periphery. The second substrate can be attached to the remaining portion of the first substrate except for the first periphery using a sealant, with the liquid crystal layer positioned between the second substrate and the first substrate.

[0369] The liquid crystal layer can be disposed between the first substrate and the second substrate. The liquid crystal layer can include liquid crystals including liquid crystal molecules, in which an arrangement direction of the liquid crystal molecules changes based on an electric field generated by a common voltage and a data voltage applied to a pixel electrode of each pixel.

[0370] The second polarization member can be attached on a bottom surface of the second substrate and can polarize light incident from the backlight unit and advancing to the liquid crystal layer. The first polarization member can be attached on a top surface of the first substrate and can polarize light passing through the first substrate and output to the outside.

[0371] The display panel 100 according to an embodiment of the present disclosure can drive the 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, can display an image based on light passing through the liquid crystal layer.

[0372] In the display panel 100 according to another embodiment of the present disclosure, the first substrate can be implemented as a color filter array substrate, and the second substrate can be implemented as a TFT array substrate. For example, the display panel 100 according to another embodiment of the present disclosure can have a type in which the upper portion and the lower portion 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 can be covered by a separate mechanism or structure.

[0373] The display panel 100 according to an embodiment of the present disclosure can include a bending portion that can be bent or curved to have a curved shape or a specific radius of curvature.

[0374] The curved portion of the display panel 100 can be located on at least one or more of one periphery and another periphery of the display panel 100, which are parallel to each other. The periphery and / or the other periphery of the display panel 100, which is implemented with the curved portion, can include only the non-display area IA, or can include the periphery of the display area AA and the non-display area IA. The display panel 100 including the curved portion implemented by curving the non-display area IA can have a single-sided bezel bending structure or a double-sided bezel bending structure. In addition, the display panel 100 including the curved portion implemented by curving the periphery of the display area AA and the non-display area IA can have a single-sided active bending structure or a double-sided active bending structure.

[0375] The vibration device 200 can vibrate the display panel 100 at the rear surface of the display panel 100, thereby providing the user (or viewer) with sound and / or haptic feedback based on the vibration of the display panel 100. The vibration device 200 can be implemented at the rear surface of the display panel 100 to directly vibrate the display panel 100. For example, the vibration device 200 can be a vibration generation device, a displacement device, a sound device, or a sound generation device, but embodiments of the present disclosure are not limited thereto.

[0376] As an embodiment of the present disclosure, the vibration device 200 can 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 can be disposed at the display panel 100, and can vibrate according to a haptic feedback signal (or tactile feedback signal) synchronized with a user touch applied to a touch panel (or touch sensor layer) embedded in the display panel 100, to vibrate the display panel 100. Accordingly, the display panel 100 can vibrate based on the vibration of the vibration device 200, to provide the user (or viewer) with at least one of sound and haptic feedback.

[0377] The vibration device 200 according to the embodiment of the 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 embodiments of the disclosure are not limited thereto. For example, the size of the vibration device 200 can be the same as or smaller than the size of the display area AA. For example, the size of the vibration device 200 can be the same as or approximately the same as the display area AA of the display panel 100, and thus 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 vibrate the entire portion of the display panel 100, and thus the localization of sound can be high, and the satisfaction of the user can be improved. In addition, the contact area (or panel coverage) between the display panel 100 and the vibration device 200 can be increased, and thus the vibration area of the display panel 100 can be increased, thereby improving the sound of the mid-low pitch sound band generated based on the vibration of the display panel 100. In addition, the vibration device 200 applied to a large-sized display device can vibrate the entire display panel 100 having a large size (or a large area), and thus the localization of sound based on the vibration of the display panel 100 can be further enhanced, thereby implementing improved sound effects. Thus, the vibration device 200 according to the embodiment of the disclosure can be disposed at the rear surface of the display panel 100 to sufficiently vibrate the display panel 100 in the vertical (or front-back) direction, thereby outputting desired sound to a frontward area in front of the display device. For example, the vibration device 200 according to the embodiment of the disclosure can be disposed at the rear surface of the display panel 100 to sufficiently vibrate the display panel 100 in the vertical (or front-back) direction with respect to the first direction (X) of the display panel 100, thereby outputting desired sound to a frontward area in front of the display device.

[0378] The vibration device 200 according to the embodiment of the disclosure can be implemented in a film type. Since the vibration device 200 can be implemented in a film type, the vibration device 200 can have a thickness thinner than the display panel 100, and thus the thickness of the display device can not be increased due to the arrangement of the vibration device 200. For example, the vibration device 200 can be referred to as a sound generating module, a vibration generating device, a displacement device, a sound 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, which uses the display panel 100 as a vibration plate, but embodiments of the disclosure are not limited thereto.

[0379] As another embodiment of the disclosure, the vibration device 200 can not be disposed at the rear surface of the display panel 100, but can be applied to a non-display panel instead of a display panel. For example, the non-display panel can be one or more of wood, plastic, glass, cloth, paper, leather, a vehicle interior material, a building indoor ceiling, an aircraft interior material, etc., but embodiments of the disclosure are not limited thereto. In this case, the non-display panel can be applied as a vibration plate, and the vibration device 200 can vibrate the non-display panel to output sound.

[0380] For example, a device according to an embodiment of the disclosure can include a vibration member (or a vibration object) and a vibration device 200 disposed at the vibration member. For example, the vibration member can include a display panel including pixels configured to display an image, or can include a non-display panel. For example, the vibration member can include a display panel including pixels configured to display an image, or can include one or more of wood, plastic, glass, cloth, paper, leather, a vehicle interior material, a vehicle glass window, a building indoor ceiling, a building glass window, a building interior material, an aircraft interior material, an aircraft glass window, but embodiments of the disclosure are not limited thereto. For example, the vibration member can include one or more of a display panel including pixels configured to display an image, a screen panel onto which an image is projected from a display device, an illumination panel, a sign panel, a vehicle interior material, a vehicle glass window, a vehicle exterior material, a building ceiling material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window, and a mirror, but embodiments of the disclosure are not limited thereto. For example, the non-display panel can be a light emitting diode illumination panel (or device), an organic light emitting illumination panel (or device), an inorganic light emitting illumination panel (or device), etc., but embodiments of the disclosure are not limited thereto. For example, the vibration member can include a display panel including pixels configured to display an image, or can include one or more of a light emitting diode illumination panel (or device), an organic light emitting illumination panel (or device), an inorganic light emitting illumination panel (or device), but embodiments of the disclosure are not limited thereto.

[0381] According to another embodiment of the disclosure, the vibration member can include a plate, and the plate can include a metal material, or can include one or more single non-metal materials or composite non-metal materials of wood, plastic, glass, cloth, paper, and leather. However, the disclosure is not limited thereto. According to another embodiment of the disclosure, the vibration member can include one or more of wood, plastic, glass, cloth, paper, and leather, but embodiments of the disclosure are not limited thereto. For example, the paper can be a cone (or a paper cone) for a speaker. For example, the cone can be paper pulp or foamed plastic, but embodiments of the disclosure are not limited thereto. For example, the vibration member can be a vibration object, a vibration plate, or a front member, but embodiments of the disclosure are not limited thereto.

[0382] A vibration device including one vibration generator can have a problem of being unable to output sufficient sound. For example, when a vibration device including one vibration generator is applied to a display device such as a television (TV), there can be a problem of being difficult to secure sufficient sound. Accordingly, when a vibration device implemented with two vibration generators arranged in parallel is applied to a device or a display device, an attachment area of the display panel 100 and the vibration device can be increased, but because the attachment area is increased, it can be difficult to attach the vibration device to the rear surface of the display panel 100 without air bubbles. For example, when the display panel 100 can be a light emitting display panel, there can be a problem of being difficult to attach the vibration device to the encapsulation substrate without air bubbles. In addition, in a vibration device implemented with two vibration generators arranged in parallel, because vibrations of adjacent vibration generators are different, there can be a problem of zonal vibration occurring in which different vibrations occur. Accordingly, there can be a problem of being difficult to output sound having enhanced sound flatness. There can be a problem of zonal vibration increasing as the attachment area of the vibration device increases.

[0383] The vibration device 200 according to an embodiment of the disclosure can include a plurality of vibration generators 210 and 230 that overlap each other. The vibration device 200 can include a plurality of vibration generators 210 and 230 that overlap or are stacked to be displaced in the same direction. For example, the vibration device 200 can include a plurality of vibration generators 210 and 230 that overlap or are stacked to have the same driving direction. For example, the vibration device 200 can include a plurality of vibration generators 210 and 230 that are stacked with each other and are configured to vibrate in the same direction. For example, some of the plurality of vibration generators 210 and 230 can overlap in a direction perpendicular to the front surface of the display panel 100. For example, each of the vibration generators 210 and 230 can be a vibrating membrane, a displacement membrane, or a sound generator, but embodiments of the disclosure are not limited thereto.

[0384] The plurality of vibration generators 210 and 230 can be overlapped or stacked to be displaced (or driven or vibrated) in the same direction. For example, in a state in which the plurality of vibration generators 210 and 230 are overlapped or stacked, the plurality of vibration generators 210 and 230 can contract or expand in the same driving direction (or displacement direction) based on the vibration driving signal, and thus, a displacement amount (or bending force or flexing force) or amplitude displacement of the display panel 100 can increase or can be maximized. Accordingly, the plurality of vibration generators 210 and 230 can increase (or maximize) the displacement amount (or bending force or flexing force) or amplitude displacement of the display panel 100, thereby enhancing a sound pressure level characteristic of a sound and / or a sound characteristic of a mid-low pitch sound band based on the vibration of the display panel 100. For example, the plurality of vibration generators 210 and 230 can be implemented such that the plurality of vibration generators 210 and 230 are overlapped or stacked to have the same driving direction, and thus, a driving force of each of the plurality of vibration generators 210 and 230 can increase or can be maximized. For example, the plurality of vibration generators 210 and 230 can be implemented such that the plurality of vibration generators 210 and 230 are stacked to have the same driving direction, and thus, vibration of each of the plurality of vibration generators 210 and 230 can increase or can be maximized. Accordingly, a sound pressure level characteristic of a sound and / or a sound characteristic of a mid-low pitch sound band generated by the display panel 100 based on the vibration of the plurality of vibration generators 210 and 230 can be enhanced. For example, the mid-low pitch sound band can be 200 Hz to 1 kHz, but embodiments of the present disclosure are not limited thereto. For example, the high pitch sound band can be 1 kHz or more or 3 kHz or more, but embodiments of the present disclosure are not limited thereto.

[0385] Each of the plurality of vibration generators 210 and 230 can include a vibration structure (or a piezoelectric structure, or a vibration portion, or a piezoelectric vibration portion) including a piezoelectric ceramic having a piezoelectric characteristic, but embodiments of the present disclosure are not limited thereto. For example, each of the plurality of vibration generators 210 and 230 according to an embodiment of the present disclosure can include a piezoelectric ceramic having a perovskite crystal structure, and thus, can vibrate (or mechanically displace) in response to an electric signal applied from the outside. For example, when a vibration driving signal (or a voice signal) is applied, each of the plurality of vibration generators 210 and 230 can alternately and repeatedly contract and expand based on a converse piezoelectric effect of the vibration structure (or the piezoelectric structure, or the vibration portion, or the piezoelectric vibration portion), and thus, can be displaced (or vibrated) in the same direction based on a bending phenomenon alternately changed in a bending direction, thereby increasing or maximizing a displacement amount (or bending force or flexing force) or amplitude displacement of the vibration apparatus 200 or / and the display panel 100.

[0386] The first vibration generator 210 disposed at the display panel 100 among the plurality of vibration generators 210 and 230 can be a main vibration generator. For example, the remaining second vibration generator 230 among the plurality of vibration generators 210 and 230 can be at least one auxiliary vibration generator stacked on the first vibration generator 210. The second vibration generator 230 can have the same structure as the first vibration generator 210, but embodiments of the present disclosure are not limited thereto.

[0387] The vibration device 200 according to an embodiment of the present disclosure can further include an adhesive member 250 (or a first connection member) disposed between the plurality of vibration generators 210 and 230.

[0388] The adhesive member 250 according to an embodiment of the present disclosure can be disposed between the plurality of vibration generators 210 and 230. For example, the plurality of vibration generators 210 and 230 are symmetrical to each other with respect to the adhesive member 250. According to an embodiment of the present disclosure, the adhesive member 250 can include a material including an adhesive layer having good adhesion or attachment force with respect to each of the plurality of vibration generators 210 and 230. For example, the adhesive member 250 can include a foam pad, a double-sided foam pad, a double-sided foam tape, a double-sided tape, an adhesive, or the like, but embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the adhesive member 250 can include an epoxy-based, an acrylic-based, a silicone-based, or a polyurethane-based, but embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the adhesive member 250 can include a polyurethane-based material having relatively toughness characteristics in acrylic resin and polyurethane compared to the acrylic resin. Accordingly, vibration loss of the vibration device 200 caused by displacement interference between the plurality of vibration generators 210 and 230 can be minimized, or each of the plurality of vibration generators 210 and 230 can be freely displaced.

[0389] According to another embodiment of the present disclosure, the adhesive member 250 can include one or more of a heat-curing adhesive, a light-curing adhesive, and a thermal adhesive. For example, the adhesive member 250 can include a thermal adhesive. The thermal adhesive can be a heat-activated type or a heat-curing type. For example, the adhesive member 250 including the thermal adhesive can attach or couple two adjacent vibration generators 210 and 230 by heat and pressure.

[0390] The plurality of vibration generators 210 and 230 according to an embodiment of the present disclosure can be integrated into one structure (or element or component) through a lamination process using the adhesive member 250. For example, the plurality of vibration generators 210 and 230 can be integrated into one structure through a lamination process using a roll.

[0391] A method of manufacturing the vibration device 200 according to an embodiment of the present disclosure will be described below.

[0392] First, a first vibration generator 210 of the plurality of vibration generators 210 and 230 can be disposed at a predetermined position of the table, and an adhesive member 250 can be aligned and placed on the first vibration generator 210 (a first loading / aligning process). For example, a first portion 210a of each vibration structure 211 of the first vibration generator 210 can be aligned or placed on a virtual extension line VL.

[0393] Subsequently, a second vibration generator 230 of the plurality of vibration generators 210 and 230 can be loaded onto the table, and can be aligned and placed on the first vibration generator 210 (a second loading / aligning process). For example, the second vibration generator 230 can be aligned and placed on the first vibration generator 210 through an aligning process of aligning and placing a second portion (or an end portion, or an end, or an outer surface, or each peripheral portion) 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.

[0394] Subsequently, the first vibration generator 210 can be primarily bonded or coupled to the second vibration generator 230 through the adhesive member 250 (a primary bonding process). For example, the primary bonding process can press at least one of the first vibration generator 210 and the second vibration generator 230 with a predetermined pressure. For example, the primary bonding process can be omitted.

[0395] Subsequently, the first vibration generator 210 and the second vibration generator 230, which are primarily bonded or coupled to each other, can be completely bonded or coupled to each other (a main bonding process).

[0396] For example, when the adhesive member 250 includes a light-cured adhesive, the main bonding process can irradiate light to the adhesive member 250 disposed between the first vibration generator 210 and the second vibration generator 230, and then the first vibration generator 210 can be mainly bonded or coupled to the second vibration generator 230 through a light-curing process of curing the adhesive member 250. For example, the light-curing process can irradiate light to the first vibration generator 210 and the second vibration generator 230 in a state in which at least one of the first vibration generator 210 and the second vibration generator 230 is pressed with a certain pressure, but embodiments of the disclosure are not limited thereto.

[0397] As another embodiment of the present disclosure, when the adhesive member 250 includes a heat-curable adhesive, the main bonding procedure can bond or couple the first vibration generator 210 to the second vibration generator 230 through a heat-curing procedure that cures the adhesive member 250 by applying heat to the adhesive member 250 disposed between the first vibration generator 210 and the second vibration generator 230. For example, the heat-curing procedure can apply heat to the first vibration generator 210 and the second vibration generator 230 in a state in which at least one of the first vibration generator 210 and the second vibration generator 230 is pressed with a certain pressure, but embodiments of the present disclosure are not limited thereto.

[0398] As another embodiment of the present disclosure, when the adhesive member 250 includes a heat-curable adhesive, the main bonding procedure can bond or couple the first vibration generator 210 to the second vibration generator 230 through a heat-curing procedure that cures the adhesive member 250 by applying heat to the adhesive member 250 disposed between the first vibration generator 210 and the second vibration generator 230. For example, the heat-curing procedure can apply heat to the first vibration generator 210 and the second vibration generator 230 in a state in which at least one of the first vibration generator 210 and the second vibration generator 230 is pressed with a certain pressure, but embodiments of the present disclosure are not limited thereto.

[0399] Subsequently, the plurality of vibration generators 210 and 230 integrated as one structure (or element) can be unloaded from the stage through the adhesive member 250.

[0400] The apparatus according to an embodiment of the present disclosure can further include a connection member 150 (or a second connection member) disposed between the display panel 100 and the vibration apparatus 200.

[0401] The connection member 150 can be disposed between the display panel 100 and the vibration apparatus 200, so that the vibration apparatus 200 can be connected or coupled to the rear surface of the display panel 100. For example, the vibration apparatus 200 can be connected or coupled to the rear surface of the display panel 100 through the connection member 150, and thus the vibration apparatus 200 can be supported by or disposed at the rear surface of the display panel 100.

[0402] The connecting member 150 according to an embodiment of the disclosure can include a material including an adhesive layer having good adhesion or attachment force with respect to each of the display panel 100 and the rear surface of the vibration device 200. For example, the connecting member 150 can include a foam pad, a double-sided foam pad, a double-sided foam tape, a double-sided tape, an adhesive, or the like, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the connecting member 150 can include an epoxy-based, an acrylic-based, a silicone-based, or a polyurethane-based, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the connecting member 150 can be different from the adhesive layer of the adhesive member 250. For example, the adhesive layer of the connecting member 150 can include an acrylic material that is relatively better in terms of adhesion and hardness in acrylic and polyurethane. Accordingly, the vibration of the vibration device 200 can be well transmitted to the display panel 100.

[0403] The adhesive layer of the connecting member 150 can further include an additive, such as a tackifier or adhesion enhancer, a wax component, an antioxidant, or the like. The additive can prevent or reduce separation (peeling) of the connecting member 150 from the display panel 100 due to the vibration of the vibration device 200. For example, the tackifier can be a rosin derivative or the like, and the wax component can be a paraffin wax or the like. For example, the antioxidant can be a phenol-based antioxidant, such as a thioester, but embodiments of the disclosure are not limited thereto.

[0404] The connecting member 150 according to another embodiment of the disclosure can further include a hollow portion between the display panel 100 and the vibration device 200. The hollow portion of the connecting member 150 can provide an air gap between the display panel 100 and the vibration device 200. Due to the air gap, a sound wave (or sound pressure) based on the vibration of the vibration device 200 can not be dispersed by the connecting member 150 and can be concentrated on the display panel 100. Accordingly, it is possible to minimize the loss of vibration caused by the connecting member 150, thereby increasing a sound characteristic and / or a sound pressure characteristic of a sound generated based on the vibration of the display panel 100.

[0405] The device according to an embodiment of the disclosure can further include a support member 300 disposed at the rear surface of the display panel 100.

[0406] The support member 300 can cover the rear surface of the display panel 100. For example, the support member 300 can cover the entire rear surface of the display panel 100 with a gap space GS therebetween. For example, the support member 300 can include at least one or more of a glass material, a metal material, and a plastic material. For example, the support member 300 can be a rear surface structure, a support structure, a support cover, a rear member, a housing, a case, or a group structure, but embodiments of the disclosure are not limited thereto. For example, the support member 300 can be referred to as other terms such as a bottom cover, a bottom plate, a rear cover, a base frame, a metal frame, a metal chassis, a chassis base, or an m-chassis. For example, the support member 300 can be implemented as an arbitrary type of frame or a plate-shaped structure disposed at the rear surface of the display panel 100.

[0407] The support member 300 according to an embodiment of the disclosure can include a first support member 310 and a second support member 330.

[0408] The first support member 310 can cover the rear surface of the display panel 100. For example, the first support member 310 can cover the entire rear surface of the first support member 310. For example, the first support member 310 can be a member that covers the entire rear surface of the first support member 310. For example, the first support member 310 can include one or more of a glass material, a metal material, and a plastic material. For example, the first support member 310 can be a first rear structure, a first support structure, a first support cover, a first rear cover, a first rear member, an inner plate, or an internal plate, but embodiments of the disclosure are not limited thereto.

[0409] The first support member 310 can be spaced apart from the rear surface of the display panel 100 with a gap space GS therebetween. For example, the gap space GS can be referred to as an air gap, a vibration space, a sound resonance box, or the like, but embodiments of the disclosure are not limited thereto.

[0410] The second support member 330 can be disposed at the rear surface of the first support member 310. The second support member 330 can be a member that covers the entire rear surface of the first support member 310. For example, the second support member 330 can include at least one or more of a glass material, a metal material, and a plastic material. For example, the second support member 330 can be a second rear structure, a second support structure, a second support cover, a second rear cover, a second rear member, an external plate, an outer plate, a rear plate, a back plate, or a rear cover, but embodiments of the disclosure are not limited thereto.

[0411] The support member 300 according to an embodiment of the disclosure can further include a connection member (or a third connection member) 350.

[0412] The connection member 350 can be disposed between the first support member 310 and the second support member 330. For example, the first support member 310 and the second support member 330 can be coupled or connected to each other by the connection member 350. For example, the connection member 350 can be an adhesive resin, a double-sided tape, a double-sided foam tape, a double-sided foam pad, or a double-sided adhesive foam pad, but embodiments of the present disclosure are not limited thereto. For example, the connection member 350 can have elasticity to absorb an impact, but embodiments of the present disclosure are not limited thereto. As an embodiment of the present disclosure, the connection member 350 can be disposed at the entire area between the first support member 310 and the second support member 330. As an embodiment of the present disclosure, the connection member 350 can be disposed in a mesh structure including air gaps between the first support member 310 and the second support member 330.

[0413] The device according to an embodiment of the present disclosure can further include an intermediate frame 400.

[0414] The intermediate frame 400 can be disposed between the rear periphery of the display panel 100 and the front periphery of the support member 300. The intermediate frame 400 can support at least one or more of the rear periphery of the display panel 100 and the front periphery of the support member 300, and can surround one or more side surfaces in each of the display panel 100 and the support member 300. The intermediate frame 400 can provide a gap space GS between the display panel 100 and the support member 300. The intermediate frame 400 can be referred to as a connection member, a frame, a frame member, an intermediate member, a side cover member, an intermediate case, an intermediate cover, an intermediate cabinet, etc., but embodiments of the present disclosure are not limited thereto.

[0415] The intermediate frame 400 according to an embodiment of the present disclosure can include a first support portion 410 and a second support portion 430. For example, the first support portion 410 can be a support portion, but embodiments of the present disclosure are not limited thereto. For example, the second support portion 430 can be a side wall portion, but embodiments of the present disclosure are not limited thereto.

[0416] The first support portion 410 can be disposed between the rear periphery of the display panel 100 and the front periphery of the support member 300, and thus can provide a gap space GS between the display panel 100 and the support member 300. A front surface of the first support portion 410 can be coupled or connected to the rear periphery of the display panel 100 by a first frame connection member 401. A rear surface of the first support portion 410 can be coupled or connected to the front periphery of the support member 300 by a second frame connection member 403. For example, the first support portion 410 can have a single picture frame structure including a square shape or a frame structure including a plurality of divided bar shapes, but embodiments of the present disclosure are not limited thereto.

[0417] The second support portion 430 can be disposed in parallel with the thickness direction Z of the display apparatus or device. For example, the second support portion 430 can be coupled to the outer surface of the first support portion 410 vertically in parallel with the thickness direction Z of the display apparatus or device. The second support portion 430 can surround one or more of the outer surface of the display panel 100 and the outer surface of the support member 300, thereby protecting the outer surface of each of the display panel 100 and the support member 300. The first support portion 410 can protrude from the inner surface of the second support portion 430 toward the gap space GS between the display panel 100 and the support member 300.

[0418] The device according to an embodiment of the disclosure can include a panel connection member instead of the middle frame 400.

[0419] The panel connection member can be disposed between the rear periphery of the display panel 100 and the front periphery of the support member 300, and can provide the gap space GS between the display panel 100 and the support member 300. The panel connection member can be disposed between the rear periphery of the display panel 100 and the front periphery of the support member 300 to bond the display panel 100 and the support member 300. For example, the panel connection member can be a double-sided tape, a single-sided tape, a double-sided foam tape, a single-sided foam tape, a double-sided foam pad, a single-sided foam pad, or a double-sided adhesive foam pad, but embodiments of the disclosure are not limited thereto. For example, the panel connection member can include an epoxy-based, an acrylic-based, a silicone-based, or a polyurethane-based, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the panel connection member can include a polyurethane-based material that is relatively flexible compared to an acrylic resin among the acrylic resin and the polyurethane. Accordingly, it is possible to minimize the vibration of the display panel 100 transmitted to the support member 300.

[0420] In the device according to the embodiment of the disclosure, when the device includes the panel connecting member instead of the middle frame 400, the support member 300 can include a curved side wall that is curved from an end (or an end portion) of the second support member 330 and surrounds an outer surface (or an outer side wall) of each of the first support member 310, the panel connecting member, and the display panel 100. The curved side wall according to the embodiment of the disclosure can have a single side wall structure or a hemming structure. The hemming structure can be a structure in which end portions of arbitrary members are curved in a curved shape and are overlapped with each other or are separated apart from each other in parallel. For example, in order to enhance design aesthetics, the curved side wall can include a first curved side wall curved from one side of the second support member 330 and a second curved side wall curved from the first curved side wall to a region between the first curved side wall and an outer surface of the display panel 100. The second curved side wall can be separated apart from an inner surface of the first curved side wall. Accordingly, the second curved side wall can prevent the outer surface of the display panel 100 from contacting the inner surface of the first curved side wall, or can prevent an external impact in a lateral direction from being transmitted to the outer surface of the display panel 100. According to another embodiment of the disclosure, in the device according to the embodiment of the disclosure, the middle frame 400 can be omitted. The device can include a panel connecting member or an adhesive member instead of the middle frame 400. According to another embodiment of the disclosure, the device can include a partition instead of the middle frame 400.

[0421] FIG. 3 A vibration device according to an embodiment of the disclosure is illustrated. FIG. 4 is a cross-sectional view taken along FIG. 3 line II-II' shown in FIG. 1.

[0422] Referring to FIG. 2 to FIG. 4 , the vibration device 200 according to the embodiment of the disclosure can include a plurality of vibration generators 210 and 230 and an adhesive member 250.

[0423] The plurality of vibration generators 210 and 230 can be overlapped or stacked to be displaced (or driven or vibrated) in the same direction, so as to maximize the amplitude displacement of the vibration device 200 and / or the amplitude displacement of the display panel 100. For example, the plurality of vibration generators 210 and 230 can have substantially the same size, but embodiments of the present disclosure are not limited thereto. For example, the plurality of vibration generators 210 and 230 can have substantially the same size within an error range of a manufacturing process, but embodiments of the present disclosure are not limited thereto. Accordingly, the plurality of vibration generators 210 and 230 can 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 can be aligned on a virtual extension line VL extending in the thickness direction Z of the display panel 100, or can be disposed at the virtual extension line VL. For example, 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 can be aligned in a direction perpendicular to the front surface of the display panel 100.

[0424] For example, in at least one of the plurality of vibration generators 210 and 230, the displacement direction and the amplitude displacement of the plurality of vibration generators 210 and 230 can not match, and thus the amplitude displacement of the vibration device 200 can not be maximized. For example, when at least one of the plurality of vibration generators 210 and 230 has a different size deviating from an error range of a manufacturing process, the displacement direction and the amplitude displacement of the plurality of vibration generators 210 and 230 can not match, and thus the amplitude displacement of the vibration device 200 can not be maximized. In addition, when at least one of the plurality of vibration generators 210 and 230 is displaced in a different direction, the displacement direction of the plurality of vibration generators 210 and 230 can not match, and thus the amplitude displacement of the vibration device 200 can not be maximized.

[0425] The vibration device 200 according to an embodiment of the present disclosure can 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.

[0426] According to an embodiment of the present disclosure, the first vibration generator 210 can be connected to or disposed at the rear surface of the display panel 100 by the connection member 150 (or the second connection member). The second vibration generator 230 can be disposed or attached on the first vibration generator 210 by the adhesive member 250 (or the first connection member).

[0427] The first vibration generator 210 and the second vibration generator 230 according to the embodiment of the disclosure can each include a vibration structure 211, a first protective member 213, and a second protective member 215.

[0428] The vibration structure 211 can include a piezoelectric material (or a piezoelectric element) having a piezoelectric property (or a piezoelectric effect). For example, the piezoelectric material can have a property in which, in the case where a pressure or a twist is applied to a crystal structure by an external force, a potential difference occurs 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. For example, the vibration structure 211 can be a vibration generation structure, a sound generation structure, a vibration generation portion, a vibration portion, a sound generation portion, a piezoelectric structure, or a displacement structure, but embodiments of the disclosure are not limited thereto.

[0429] The vibration structure 211 according to the embodiment of the disclosure can 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 or different from the first surface.

[0430] The vibration portion 211a can include a piezoelectric material. The vibration portion 211a can be referred to as a vibration layer, a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric vibration portion, a piezoelectric vibration layer, a piezoelectric composite material, a displacement portion, a piezoelectric displacement portion, a piezoelectric displacement layer, a sound wave generation portion, a piezoelectric material portion, an electroactive portion, an organic / inorganic material layer, an inorganic material layer, an organic / inorganic material portion, or an inorganic material portion, but embodiments of the disclosure are not limited thereto.

[0431] The vibration portion 211a can be formed of a transparent, semi-transparent, or non-transparent piezoelectric material, and the vibration portion 211a can be transparent, semi-transparent, or non-transparent.

[0432] The vibration portion 211a can be configured as a ceramic-based material for generating a relatively high vibration, or can be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure can have a piezoelectric effect and a converse piezoelectric effect, and can be a plate-like structure having a direction. The perovskite crystal structure can be represented by a chemical formula "ABO3". In the chemical formula, "A" can include a divalent metal element, and "B" can include a tetravalent metal element. As one embodiment of the disclosure, in the chemical formula "ABO3", "A" and "B" can be cations, and "O" can be an anion. For example, the chemical formula "ABO3" can include at least one or more of PbTiO3, PbZrO3, BaTiO3, and SrTiO3, but embodiments of the disclosure are not limited thereto.

[0433] When the perovskite crystal structure includes a central ion (e.g., lead (II) titanate), the position of titanium (Ti) ions can be changed by an external stress or a magnetic field, and thus, the polarization can be changed, thereby generating a piezoelectric effect. For example, in the peroviskite crystal structure, a cubic shape corresponding to a symmetrical structure can be changed to a tetragonal (e.g., a quadrilateral), a square, or a rhombohedral structure corresponding to an asymmetrical structure, and thus, a piezoelectric effect can be generated. In the tetragonal (e.g., a quadrilateral), the square, or the rhombohedral structure corresponding to the asymmetrical structure, the degree of polarization at the morphotropic phase boundary can be high, and the polarization can be easily rearranged, and thus, the peroviskite crystal structure can have a high piezoelectric property.

[0434] The vibration portion 211a according to an embodiment of the disclosure can include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but embodiments of the disclosure are not limited thereto.

[0435] As another embodiment of the disclosure, the vibration portion 211a can include a lead zirconate titanate (PZT)-based material including lead (Pb), zirconium (Zr), and titanium (Ti), or can include a lead zirconate nickelate (PZNN)-based material including lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but embodiments of the disclosure are not limited thereto. In addition, the vibration portion 211a can include at least one or more of CaTiO3, BaTiO3, and SrTiO3 not containing Pb, but embodiments of the disclosure are not limited thereto.

[0436] According to another embodiment of the disclosure, the vibration portion 211a can have a piezoelectric strain coefficient "d33" of 1,000 pC / N or more in the thickness direction Z. Accordingly, the vibration device 200 can be applied to a display panel having a large size, and can need to have a high piezoelectric strain coefficient "d33" to have sufficient vibration characteristics or piezoelectric characteristics. For example, the vibration portion 211a can include a PZT-based material (PbZrTiO3) as a main component, and can include a softener dopant material doped into an "A" site (Pb) and a relaxor ferroelectric material doped into a "B" site (ZrTi).

[0437] The softener dopant material can enhance the piezoelectric and dielectric properties of the vibration portion 211a, and for example, can increase the piezoelectric strain coefficient "d33" of the vibration portion 211a. When the softener dopant material includes a monovalent element "+1", the inventors have confirmed that the piezoelectric and dielectric properties are reduced. For example, when the softener dopant material includes potassium (K) and rubidium (Rb), the piezoelectric and dielectric properties can be reduced. Accordingly, through various experiments, the inventors have recognized that, in order to enhance the piezoelectric and dielectric properties, the softener dopant material should include a divalent element "+2" to a trivalent element "+3". The softener dopant material according to the embodiment of the disclosure can include a divalent element "+2" to a trivalent element "+3". The morphotropic phase boundary (MPB) can be achieved by adding the softener dopant material to the PZT-based material (PbZrTiO3), and thus, the piezoelectric and dielectric properties can be enhanced. For example, the softener dopant material can include strontium (Sr), barium (Ba), lanthanum (La), neodymium (Nd), calcium (Ca), yttrium (Y), erbium (Er), or ytterbium (Yb). For example, the ions (Sr2+, Ba2+, La2+, Nd3+, Ca2+, Y3+, Er3+, Yb3+) of the softener dopant material doped into the PZT-based material (PbZrTiO3) can replace a portion of lead (Pb) in the PZT-based material (PbZrTiO3), and the replacement rate thereof can be about 2 mol% to about 20 mol%. For example, when the replacement rate is less than 2 mol% or more than 20 mol%, the perovskite crystal structure can be broken, and thus, the electromechanical coupling coefficient "kP" and the piezoelectric strain coefficient "d33" can be reduced. When the softener dopant material is replaced, the MPB can be formed, and the MPB of the piezoelectric and dielectric properties can be high, thereby achieving a vibration device having high piezoelectric properties and high dielectric properties.

[0438] According to the embodiment of the disclosure, the relaxor ferroelectric material doped into the PZT-based material (PbZrTiO3) can enhance the electrostriction properties of the vibration portion 211a. The relaxor ferroelectric material according to the embodiment of the disclosure can include a lead magnesium niobate (PMN)-based material or a lead nickel niobate (PNN)-based material, but the embodiment of the disclosure is not limited thereto. The PMN-based material can include Pb, Mg, and Nb, and for example, can include Pb(Ni,Nb)O3. For example, the relaxor ferroelectric material doped into the PZT-based material (PbZrTiO3) can replace a portion of each of zirconium (Zr) and titanium (Ti) in the PZT-based material (PbZrTiO3), and the replacement rate thereof can be about 5 mol% to about 25 mol%. For example, when the replacement rate is less than 5 mol% or more than 25 mol%, the perovskite crystal structure can be broken, and thus, the electromechanical coupling coefficient "kP" and the piezoelectric strain coefficient "d33" can be reduced.

[0439] According to embodiments of the present disclosure, the vibration portion 211a can further include a dopant material doped into the "B" site (ZrTi) of the PZT-based material (PbZrTiO3) in order to further enhance the piezoelectric coefficient. For example, the dopant material doped into the "B" site (ZrTi) can include a tetravalent element "+4" or a hexavalent element "+6". For example, the dopant material doped into the "B" site (ZrTi) can include tellurium (Te), germanium (Ge), uranium (U), bismuth (Bi), niobium (Nb), tantalum (Ta), antimony (Sb), or tungsten (W).

[0440] The vibration portion 211a according to embodiments of the present disclosure can be expressed as Equation 1 below.

[0441] [Equation 1]

[0442] (PbA-BCB)((Mg1 / 3Nb2 / 3)a(Ni1 / 3Nb2 / 3)bZrcTid)O3

[0443] Here, C can be one of Ca, Sr, and Ba. Also, a + b + c + d = 1, 0.02 ≤ B ≤ 0.20, 0.80 ≤ A - B ≤ 0.98, 0.05 ≤ a ≤ 0.25, 0.05 ≤ b ≤ 0.25, 0.10 ≤ c ≤ 0.50, and 0.10 ≤ d ≤ 0.50.

[0444] The vibration portion 211a according to embodiments of the present disclosure can have a piezoelectric strain coefficient "d33" of 1000 pC / N or more in the thickness direction Z, thereby implementing a vibration device having enhanced vibration characteristics. For example, the vibration device having enhanced vibration characteristics can be implemented in a large-area device or a large-area display device.

[0445] The vibration portion 211a according to embodiments of the present disclosure can be configured in a circular shape, an elliptical shape, or a polygonal shape, but embodiments of the present disclosure are not limited thereto.

[0446] The first electrode portion 211b can be disposed at a first surface (or a top surface) of the vibration portion 211a. For example, the first electrode portion 211b can be electrically coupled or connected to the first surface of the vibration portion 211a. For example, the first electrode portion 211b can have a single electrode type disposed at the entire first surface of the vibration portion 211a. For example, the first electrode portion 211b can have the same shape 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 can 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 can include indium tin oxide (ITO) or indium zinc oxide (IZO), but embodiments of the present disclosure are not limited thereto. The opaque conductive material can include aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), Mg, or the like, but embodiments of the present disclosure are not limited thereto.

[0447] The second electrode portion 211c can be disposed at a second surface (or a back surface) of the vibration portion 211a opposite or different from the first surface. For example, the second electrode portion 211c can be electrically coupled or connected to the second surface of the vibration portion 211a. For example, the second electrode portion 211c can have a single electrode type disposed at the entire second surface of the vibration portion 211a. The second electrode portion 211c can have the same shape 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 can be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the second electrode portion 211c can be formed of the same material as the first electrode portion 211b, but embodiments of the present disclosure are not limited thereto. As another embodiment of the present disclosure, the second electrode portion 211c can be formed of a different material from the first electrode portion 211b.

[0448] In each of the first vibration generator 210 and the second vibration generator 230, the first electrode portion 211b can be disposed closer to the display panel 100 than the second electrode portion 211c, but embodiments of the present disclosure are not limited thereto. For example, in the vibration device 200 including a plurality of vibration generators 210 and 230 according to an embodiment of the present disclosure, the first electrode portion 211b of each of the plurality of vibration generators 210 and 230 can be disposed closer to the display panel 100 than the second electrode portion 211c. For example, one of the first electrode portion 211b of the first vibration generator 210 and the first electrode portion 211b of the second vibration generator 230 can be referred to as a third electrode portion, but embodiments of the present disclosure are not limited thereto. One of the second electrode portion 211c of the first vibration generator 210 and the second electrode portion 211c of the second vibration generator 230 can be referred to as a fourth electrode portion, but embodiments of the present disclosure are not limited thereto.

[0449] The vibration portion 211a can be polarized by a specific voltage applied to the first electrode portion 211b and the second electrode portion 211c in a specific temperature atmosphere or a temperature atmosphere changing from a high temperature to a room temperature, but embodiments of the present disclosure are not limited thereto. For example, the vibration portion 211a can alternately and repeatedly contract and expand based on a reverse piezoelectric effect according to a vibration driving signal (or a sound signal or a voice signal) applied from the outside to the first electrode portion 211b and the second electrode portion 211c, and thus can be displaced or vibrated.

[0450] The vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 can have the same size as the vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230. To maximize or increase the displacement amount or amplitude displacement of the vibration device 200, the vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 can be substantially overlapped or stacked with the vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 without being staggered. For example, the vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 can be substantially overlapped or stacked with the vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 without being staggered within the error range of the manufacturing process. For example, the vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 and the vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 can be implemented in a stacked structure having the same size and being overlapped without being staggered, and thus the displacement amount or amplitude displacement of the vibration device 200 can be maximized or increased. For example, the vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 and the vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 can be implemented in a stacked structure having the same size and being precisely overlapped without being staggered, and thus the displacement amount or amplitude displacement of the vibration device 200 can be maximized or increased.

[0451] According to embodiments of the present disclosure, the first portion (or end, or end, or outer surface, or each corner) 210a of each vibration structure 211 (or vibration portion 211a) of the first vibration generator 210 can be aligned on, or can be disposed at, the virtual extension line VL. For example, the first portion (or end, or end, or outer surface, or each corner) 210a of each vibration structure 211 (or vibration portion 211a) of the first vibration generator 210 can be precisely aligned on, or can be precisely disposed at, the virtual extension line VL. The second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230 can be aligned on, or can be disposed at, the virtual extension line VL. For example, the second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230 can be precisely aligned on, or can be precisely disposed at, the virtual extension line VL. The first portion 210a of each vibration structure 211 (or vibration portion 211a) of the first vibration generator 210 can be aligned with, or overlap, the second portion 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230. For example, the first portion 210a of the vibration structure 211 (or vibration portion 211a) of the first vibration generator 210 can be precisely aligned with, or overlap, the second portion 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230. For example, the first portion 210a of the vibration structure 211 (or vibration portion 211a) of the first vibration generator 210 can correspond to the second portion 230a of each vibration structure 211 (or vibration portion 211a) of the second vibration generator 230. Accordingly, in the vibration device 200 according to embodiments of the present disclosure, the vibration structure 211 (or first vibration structure) of the first vibration generator 210 and the vibration structure 211 (or second vibration structure) of the second vibration generator 230 can be displaced in the same direction, and thus, the displacement amount or amplitude displacement of the vibration device 200 can be maximized or increased. Accordingly, the displacement amount (or bending force or flexural force) or amplitude displacement of the display panel 100 can be increased (or maximized).

[0452] In the first vibration generator 210, the first protection member 213 can be disposed at the first electrode portion 211b. The first protection member 213 can protect the first electrode portion 211b. The second protection member 215 can be disposed at the second electrode portion 211c. The second protection member 215 can protect the second electrode portion 211c. For example, the first protection member 213 and the second protection member 215 of the first vibration generator 210 can be formed of a plastic material, a fiber material, or a wood material, but embodiments of the present disclosure are not limited thereto. For example, in the first vibration generator 210, the first protection member 213 can be formed of the same or different material as the second protection member 215. Any one of the first protection member 213 and the second protection member 215 of the first vibration generator 210 can be connected or coupled to the display panel 100 through the connection member (or the second connection member) 150. For example, the first protection member 213 of the first vibration generator 210 can be connected or coupled to the display panel 100 through the connection member (or the second connection member) 150.

[0453] In the second vibration generator 230, the first protection member 213 can be disposed at the first electrode portion 211b. The first protection member 213 can protect the first electrode portion 211b. The second protection member 215 can be disposed at the second electrode portion 211c. The second protection member 215 can protect the second electrode portion 211c. For example, the first protection member 213 and the second protection member 215 of the second vibration generator 230 can be formed of a plastic material, a fiber material, or a wood material, but embodiments of the present disclosure are not limited thereto. For example, in the second vibration generator 230, the first protection member 213 can be formed of the same or different material as the second protection member 215. Any one of the first protection member 213 and the second protection member 215 of the second vibration generator 230 can be connected or coupled to the first vibration generator 210 through the adhesive member (or the first connection member) 250. For example, the first protection member 213 of the second vibration generator 230 can be connected or coupled to the second protection member 215 of the first vibration generator 210 through the adhesive member 250.

[0454] 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 can be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but embodiments of the present disclosure are not limited thereto.

[0455] One or more of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the present disclosure can further include a first adhesive layer 212 and a second adhesive layer 214.

[0456] In the first vibration generator 210, the first adhesive layer 212 can be disposed between the vibration structure 211 and the first protective member 213. For example, the first adhesive layer 212 can be disposed between the first electrode portion 211b of the vibration structure 211 and the first protective member 213. The first protective member 213 can be disposed at the first surface (or the first electrode portion 211b) of the vibration structure 211 by the first adhesive layer 212. For example, the first protective member 213 can be coupled or connected to the first surface (or the first electrode portion 211b) of the vibration structure 211 by a film lamination process using the first adhesive layer 212.

[0457] In the first vibration generator 210, the second adhesive layer 214 can be disposed between the vibration structure 211 and the second protective member 215. For example, the second adhesive layer 214 can be disposed between the second electrode portion 211c of the vibration structure 211 and the second protective member 215. The second protective member 215 can be disposed at the second surface (or the second electrode portion 211c) of the vibration structure 211 by the second adhesive layer 214. For example, the second protective member 215 can be coupled or connected to the second surface (or the second electrode portion 211c) of the vibration structure 211 by a film lamination process using the second adhesive layer 214.

[0458] In the first vibration generator 210, the first adhesive layer 212 and the second adhesive layer 214 can 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 can be connected or coupled to each other at a peripheral portion between the first protective member 213 and the second protective member 215. Accordingly, in the first vibration generator 210, the vibration structure 211 can be surrounded by the first adhesive layer 212 and the second adhesive layer 214. For example, the first adhesive layer 212 and the second adhesive layer 214 can completely surround the entire vibration structure 211. For example, the first adhesive layer 212 and the second adhesive layer 214 can be referred to as a cover member, but embodiments of the present disclosure are not limited thereto. When the first adhesive layer 212 and the second adhesive layer 214 are a cover member, the first protective member 213 can be disposed at a first surface of the cover member, and the second protective member 215 can be disposed at a second surface of the cover member.

[0459] In the second vibration generator 230, the first adhesive layer 212 can be disposed between the vibration structure 211 and the first protective member 213. For example, the first adhesive layer 212 can be disposed between the first electrode portion 211b of the vibration structure 211 and the first protective member 213. The first protective member 213 can be disposed at the first surface (or the first electrode portion 211b) of the vibration structure 211 by the first adhesive layer 212. For example, the first protective member 213 can be coupled or connected to the first surface (or the first electrode portion 211b) of the vibration structure 211 by a film lamination process using the first adhesive layer 212.

[0460] In the second vibration generator 230, the second adhesive layer 214 can be disposed between the vibration structure 211 and the second protective member 215. For example, the second adhesive layer 214 can be disposed between the second electrode portion 211c of the vibration structure 211 and the second protective member 215. The second protective member 215 can be disposed at the second surface (or the second electrode portion 211c) of the vibration structure 211 by the second adhesive layer 214. For example, the second protective member 215 can be coupled or connected to the second surface (or the second electrode portion 211c) of the vibration structure 211 by a film lamination process using the second adhesive layer 214.

[0461] In the second vibration generator 230, the first adhesive layer 212 and the second adhesive layer 214 can 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 can be connected or coupled to each other at a peripheral portion between the first protective member 213 and the second protective member 215. Accordingly, in the second vibration generator 230, the vibration structure 211 can be surrounded by the first adhesive layer 212 and the second adhesive layer 214. For example, the first adhesive layer 212 and the second adhesive layer 214 can completely surround the entire vibration structure 211. For example, the first adhesive layer 212 and the second adhesive layer 214 can be referred to as a cover member, but embodiments of the present disclosure are not limited thereto. When the first adhesive layer 212 and the second adhesive layer 214 are a cover member, the first protective member 213 can be disposed at a first surface of the cover member, and the second protective member 215 can be disposed at a second surface of the cover member.

[0462] 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 can include an electrically insulating material. For example, the electrically insulating material can have adhesiveness and can include a material capable of compression and decompression. For example, one or more of the first adhesive layer 212 and the second adhesive layer 214 can include an epoxy resin, an acrylic resin, a silicone resin, or a polyurethane resin, but embodiments of the present disclosure are not limited thereto.

[0463] One or more of the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the disclosure can further include a first power line PL1, a second power line PL2, and a pad portion 217.

[0464] The first power line PL1 of one or more of the first vibration generator 210 and the second vibration generator 230 can extend longer in the second direction Y. The first power line PL1 can be disposed at the first protective member 213 and can be electrically connected to the first electrode portion 211b. For example, the first power line PL1 can be disposed at a rear surface of the first protective member 213 facing the first electrode portion 211b and can be electrically connected to the first electrode portion 211b. For example, the first power line PL1 can be disposed at a rear surface of the first protective member 213 directly facing the first electrode portion 211b and can be directly electrically connected to the first electrode portion 211b. As an embodiment of the disclosure, the first power line PL1 can be electrically connected to the first electrode portion 211b through an anisotropic conductive film. As another embodiment of the disclosure, the first power line PL1 can be electrically connected to the first electrode portion 211b through a conductive material (or particles) included in the first adhesive layer 212. For example, the first power line PL1 can be electrically connected to each of the first electrode portion 211b of the first vibration generator 210 and the first electrode portion 211b (or the third electrode portion) of the second vibration generator 230.

[0465] For example, the first power line PL1 of one or more of the first vibration generator 210 and the second vibration generator 230 can include at least one or more first power lines protruding in a first direction X crossing the second direction Y. The at least one or more first power lines can extend longer in the first direction X from at least one or more of one surface and another surface of the first power line PL1 and can be electrically connected to the first electrode portion 211b. Accordingly, the at least one or more first power lines can enhance uniformity of a vibration driving signal applied to the first electrode portion 211b.

[0466] The second power line PL2 of one or more of the first vibration generator 210 and the second vibration generator 230 can be disposed at the second protective member 215 and can be electrically connected to the second electrode portion 211c. For example, the second power line PL2 can be disposed at a rear surface of the second protective member 215 facing the second electrode portion 211c and can be electrically connected to the second electrode portion 211c. For example, the second power line PL2 can be disposed at a rear surface of the second protective member 215 directly facing the second electrode portion 211c and can be directly electrically connected to the second electrode portion 211c. As an embodiment of the present disclosure, the second power line PL2 can 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 can be electrically connected to the second electrode portion 211c through a conductive material (or particles) included in the second adhesive layer 214. For example, the second power line PL2 can be electrically connected to each of the second electrode portion 211c of the first vibration generator 210 and the second electrode portion 211c (or the fourth electrode portion) of the second vibration generator 230.

[0467] For example, the second power line PL2 of one or more of the first vibration generator 210 and the second vibration generator 230 can include at least one or more second power lines protruding in the first direction X. The at least one or more second power lines can extend longer than the first direction X from at least one or more of one surface and the other surface of the second power line PL2 and can be electrically connected to the second electrode portion 211c. The at least one or more second power lines can be overlapped or stacked with the at least one or more first power lines. Accordingly, the at least one or more second power lines can enhance uniformity of a vibration driving signal applied to the second electrode portion 211c.

[0468] The pad portion 217 can 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 can 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 can be electrically connected to a first portion (or one side or one end) of one or more of the first power line PL1 and the second power line PL2 at the first peripheral portion of one or more of the first protective member 213 and the second protective member 215.

[0469] The pad portion 217 according to the embodiment of the disclosure can include a first pad electrode electrically connected with a portion (or one end or one side) of the first power line PL1 and a second pad electrode electrically connected with 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 can be exposed at a first peripheral portion of one or more of the first protective member 213 and the second protective member 215.

[0470] One or more of the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the disclosure can further include a flexible cable 219.

[0471] The flexible cable 219 can be electrically connected to the pad portion 217 of one or more of the first vibration generator 210 and the second vibration generator 230. Accordingly, the flexible cable 219 can provide a vibration driving signal (or a sound signal) provided from a vibration driving circuit to the corresponding vibration structure 211. The flexible cable 219 according to the embodiment of the disclosure can include a first terminal electrically connected with the first pad electrode of the pad portion 217 and a second terminal electrically connected with the second pad electrode of the pad portion 217. For example, the flexible cable 219 can be a flexible printed circuit cable or a flexible flat cable, but the embodiment of the disclosure is not limited thereto.

[0472] The vibration driving circuit (or a sound processing circuit) can generate an alternating current (AC) vibration driving signal including the first vibration driving signal and the second vibration driving signal based on a sound source. The first vibration driving signal can be one of a positive (+) vibration driving signal and a negative (-) vibration driving signal, and the second vibration driving signal can be one of the positive (+) vibration driving signal and the negative (-) vibration driving signal. As an embodiment of the disclosure, the first vibration driving signal can 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 driving signal can 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 disclosure, the first vibration driving signal can 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 can be provided to the first electrode portion 211b of the vibration structure 211 through the second terminal of the flexible cable 219, the first pad electrode of the pad portion 217, and the first power line PL1.

[0473] The adhesive member 250 according to the embodiment of the disclosure can be disposed between the first vibration generator 210 and the second vibration generator 230. For example, the adhesive member 250 can 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 can include a material including an adhesive layer having good adhesion or attachment force with respect to the first vibration generator 210 and the second vibration generator 230. For example, the adhesive member 250 can include a foam pad, a double-sided tape, a double-sided foam pad, a double-sided foam tape, or an adhesive, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the adhesive member 250 can include an epoxy-based, an acrylic-based, a silicone-based, or a polyurethane-based, but embodiments of the disclosure are not limited thereto.

[0474] In FIG. 3 and FIG. 4And in the description related thereto, the vibration device 200 according to the embodiment of the disclosure has been described as including the first vibration generator 210 and the second vibration generator 230 and the adhesive member 250 disposed between the first vibration generator 210 and the second vibration generator 230, but the embodiment of the disclosure is not limited thereto. For example, the vibration device 200 according to the embodiment of the disclosure can include a plurality (e.g., three or more) of vibration generators 210 and 230 and the adhesive member 250 disposed between the plurality of vibration generators 210 and 230 on the basis of the sound pressure level characteristic and the output characteristic of the sound generated based on the displacement of the display panel 100 of the size and weight of the display panel 100. 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 can have the same size and can be overlapped or stacked. For example, the first and second portions (or the end portions, or the ends, or the outer surfaces, or each corner portion) 210a and 230a of each vibration structure 211 (or the vibration portion 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 and second portions (or the end portions, or the ends, or the outer surfaces, or each corner portion) 210a and 230a of each vibration structure 211 (or the vibration portion 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 and second portions (or the end portions, or the ends, or the outer surfaces, or each corner portion) 210a and 230a of each vibration structure 211 (or the vibration portion 221a) of each of the plurality of vibration generators 210 and 230 can be aligned on a virtual extension line VL, or can be disposed at the virtual extension line VL. For example, the first and second portions (or the end portions, or the ends, or the outer surfaces, or each corner portion) 210a and 230a of each vibration structure 211 (or the vibration portion 221a) of each of the plurality of vibration generators 210 and 230 can be precisely aligned on a virtual extension line VL, or can be precisely disposed at the virtual extension line VL.

[0475] FIG. 5 A vibration driving circuit 500 according to an embodiment of the disclosure is illustrated. FIG. 5 A vibration driving circuit connected to FIG. 3 a vibration device is illustrated.

[0476] Referring to FIG. 3 to FIG. 5 , the vibration driving circuit 500 according to the embodiment of the disclosure can be electrically connected to the vibration device 200 and can 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.

[0477] The vibration driving circuit 500 according to the embodiment of the disclosure can include a plurality of amplifiers 501 and 502 connected to a plurality of vibration generators 210 and 230 constituting the vibration device 200, respectively. For example, the vibration driving circuit 500 can include a first amplifier 501 and a second amplifier 502 connected to a first vibration generator 210 and a second vibration generator 230 constituting the vibration device 200, respectively.

[0478] The first amplifier 501 can 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.

[0479] The first amplifier 501 according to the embodiment of the disclosure can include a first output terminal T11 outputting the first vibration driving signal and a second output terminal T12 outputting the second vibration driving signal.

[0480] In the first amplifier 501, the first output terminal T11 can 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 can 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 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. For example, the first vibration driving signal output from the first output terminal T11 of the first amplifier 501 can be supplied 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 driving signal output from the second output terminal T12 of the first amplifier 501 can be supplied 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.

[0481] The second amplifier 502 according to the embodiment of the disclosure can include a first output terminal T21 outputting the first vibration driving signal and a second output terminal T22 outputting the second vibration driving signal.

[0482] The first output terminal T21 and the second output terminal T22 of the second amplifier 502 can be connected to the first electrode portion 211b and the second electrode portion 211c of the second vibration generator 230, respectively, such 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 can 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 can 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 can 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 can 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 can be supplied to the second electrode portion 211c through the flexible cable 219, the pad portion 217, and the second power supply 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 can be supplied to the first electrode portion 211b through the flexible cable 219, the pad portion 217, and the first power supply line PL1 of the second vibration generator 230.

[0483] In FIG. 5 In the description and the description related thereto, the vibration drive circuit 500 according to the embodiment of the disclosure has been described as including the first amplifier 501 and the second amplifier 502, but the embodiment of the disclosure is not limited thereto. For example, the vibration drive circuit 500 according to the embodiment of the disclosure can include a plurality (for example, three or more) of 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 can supply a vibration drive signal for displacing each of the three or more vibration generators 210 and 230 in the same direction. According to the embodiment of the disclosure, 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 can include a first group and a second group, and the plurality of amplifiers 501 and 502 can include a first amplifier group and a second amplifier group.

[0484] The vibration generators 210 of the first group (e.g., odd-numbered vibration generators) can be displaced by the vibration driving signal applied from the amplifiers 501 (e.g., odd-numbered amplifiers) of the first amplifier group, and the vibration generators 230 of the second group (e.g., even-numbered vibration generators) can be displaced by the vibration driving signal applied from the amplifiers 502 (e.g., even-numbered amplifiers) of the second amplifier group, whereby the three or more vibration generators 210 and 230 can be displaced in the same direction. For example, in the amplifiers 501 of the first amplifier group, the first output terminal T11 can be electrically connected to the first electrode portion 211b of the vibration generators 210 of the first group, and the second output terminal T12 can be electrically connected to the second electrode portion 211c of the vibration generators 210 of the first group. Also, in the amplifiers 502 of the second amplifier group, the first output terminal T21 can be electrically connected to the second electrode portion 211c of the vibration generators 230 of the second group, and the second output terminal T22 can be electrically connected to the first electrode portion 211b of the vibration generators 210 of the second group.

[0485] FIG. 6A Displacement of a vibration generator according to an embodiment of the disclosure is illustrated. FIG. 6B Displacement of a vibration device according to an embodiment of the disclosure is illustrated.

[0486] Referring to FIG. 6A The plurality of vibration generators 210 and 230 according to the embodiment of the disclosure can be displaced (or vibrated) based on the first amplitude DW1 according to the vibration driving signal with respect to the thickness direction Z of the display panel 100. For example, the vibration portion 211a of each of the vibration generators 210 and 230 can 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 can be displaced based on the first amplitude DW1 on the basis of expansion of the first region based on the positive (+) vibration driving signal and contraction of the second region based on the negative (-) vibration driving signal. Accordingly, the display panel 100 can be displaced (or vibrated) based on the second amplitude DW2 corresponding to the first amplitude DW1 on the basis of displacement of the vibration generators 210 and 230 having the first amplitude DW1.

[0487] Referring to FIG. 6B, the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the disclosure can be displaced (or vibrated) based on the third amplitude DW3 according to the vibration driving signal with respect to the thickness direction Z of the display panel 100. The first vibration generator 210 and the second vibration generator 230 can be displaced (or vibrated) in the same direction based on the stack structure in which the first vibration generator 210 and the second vibration generator 230 overlap each other, and thus, the vibration device including the first vibration generator 210 and the second vibration generator 230 having the stack structure can be displaced (or vibrated) based on a relatively greater 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 can include a first area (or a first polarization area) adjacent to the first electrode portion 211b and a second area (or a second polarization area) adjacent to the second electrode portion 211c. The vibration portion 211a of the first vibration generator 210 can be displaced based on the third amplitude DW3 on the basis of expansion of the first area based on the positive (+) vibration driving signal and contraction of the second area based on the negative (-) vibration driving signal, and at the same time, the vibration portion 211a of the second vibration generator 230 can be displaced based on the fourth amplitude DW4 on the basis of contraction of the first area based on the negative (-) vibration driving signal and expansion of the second area based on the positive (+) vibration driving signal. Thus, the display panel 100 can be displaced (or vibrated) based on a 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 greater amplitude than the vibration of the vibration device including the vibration generator having a single structure. For example, the vibration device 200 according to the embodiment of the disclosure can have a driving direction matching the driving direction of the vibration device including the vibration generator having a single structure, and thus, the driving force of the vibration device 200 can be maximized or enhanced. Thus, the displacement amount (or the bending force or the flexing force) or the amplitude displacement of the display panel 100 can be increased (or maximized) by the displacement of the vibration device 200, and thus, the sound pressure level characteristic of the sound generated based on the vibration of the display panel 100 and / or the sound characteristic of the mid-low tone sound band.

[0488] FIG. 7 A vibration device according to another embodiment of the disclosure is illustrated. FIG. 8 is a cross-sectional view taken along FIG. 7 line III-III' shown in FIG. 3. FIG. 8 An embodiment implemented by modifying a second vibration generator of the vibration device shown in FIG. 3 Thus, in the following description, the description of elements other than the second vibration generator and elements related thereto will be omitted or will be briefly given.

[0489] Referring to FIG. 7 and FIG. 8 In the vibration device 200 according to another embodiment of the disclosure, the second vibration generator 230 can include the vibration structure 211, the first protection member 213, and the second protection member 215. The second vibration generator 230 can be attached to the first vibration generator 210 as a vertically inverted type.

[0490] The second vibration generator 230 can be disposed on the rear surface of the first vibration generator 210 in a state of being vertically inverted with respect to the rear surface of the display panel 100 to have a stacked structure opposite to that of the first vibration generator 210, by the adhesive member 250 (or the first connection member).

[0491] According to an embodiment of the disclosure, the first protection member 213 of the first vibration generator 210 can be connected or coupled to the rear surface of the display panel 100 by the connection member 150 (or the second connection member). In this case, the second protection member 215 of the second vibration generator 230 can be connected or coupled to the second protection member 215 of the first vibration generator 210 by the adhesive member 250. For example, in order to simultaneously displace the first vibration generator 210 and the second vibration generator 230 in the same direction, the first electrode portion 211b of the first vibration generator 210 can 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 can be disposed closer to the display panel 100 than the first electrode portion 211b.

[0492] According to another embodiment of the disclosure, the second protection member 215 of the first vibration generator 210 can be connected or coupled to the rear surface of the display panel 100 by the connection member 150. In this case, the first protection member 213 of the second vibration generator 230 can be connected or coupled to the first protection member 213 of the first vibration generator 210 by the adhesive member 250. For example, in order to simultaneously displace the first vibration generator 210 and the second vibration generator 230 in the same direction, the second electrode portion 211c of the first vibration generator 210 can 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 can be disposed closer to the display panel 100 than the second electrode portion 211c.

[0493] Accordingly, in the vibration device 200 according to another embodiment of the disclosure, the second vibration generator 230 can be disposed at the first vibration generator 210 in a state of being vertically inverted, and thus, when performing electrical connection to 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 if the electrical connection structure between the second vibration generator 230 and the vibration driving circuit is not changed.

[0494] FIG. 9 A vibration driving circuit 500 according to another embodiment of the disclosure is illustrated. FIG. 9 A vibration driving circuit connected to FIG. 7 a vibration device is illustrated.

[0495] Referring to FIG. 7 to FIG. 9 , the vibration driving circuit 500 according to another embodiment of the disclosure can be electrically connected to the vibration device 200, and can 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.

[0496] The vibration driving circuit 500 according to an embodiment of the disclosure can include a plurality of amplifiers 501 and 502 connected to a plurality of vibration generators 210 and 230 constituting the vibration device 200, respectively. For example, the vibration driving circuit 500 can include a first amplifier 501 and a second amplifier 502 connected to a first vibration generator 210 and a second vibration generator 230 constituting the vibration device 200, respectively.

[0497] The first amplifier 501 can generate an AC vibration driving signal including a first vibration driving signal and a second vibration driving signal based on a sound source. The first amplifier 501 according to an embodiment of the disclosure can include a first output terminal T11 outputting the first vibration driving signal and a second output terminal T12 outputting the second vibration driving signal. The first amplifier 501 can be substantially the same as the first amplifier 501 described above with reference to FIG. 5 , and thus, a repetitive description thereof is omitted.

[0498] The second amplifier 502 according to an embodiment of the disclosure can include a first output terminal T21 outputting the first vibration driving signal and a second output terminal T22 outputting the second vibration driving signal.

[0499] The first output terminal T21 and the second output terminal T22 of the second amplifier 502 can be connected to the first electrode portion 211b and the second electrode portion 211c of the second vibration generator 230, respectively, such 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 can 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 can 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 can be supplied to the first electrode portion 211b through the flexible cable 219, the land 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 can be supplied to the second electrode portion 211c through the flexible cable 219, the land portion 217, and the second power line PL2 of the second vibration generator 230.

[0500] In the vibration driving circuit 500 according to another embodiment of the disclosure, the second vibration generator 230 can be provided at or attached to the first vibration generator 210 as a vertical inversion type, and thus the second amplifier 502 can 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, FIG. 2 to FIG. 5 The illustrated second vibration generator 230 can be provided at or attached to the first vibration generator 210 without vertical inversion, and thus, in order to displace the three or more vibration generators 210 and 230 in the same direction, the second amplifier 502 can be electrically connected to the second vibration generator 230 in a state in which the positions of the first output terminal T21 and the second output terminal T22 of the second amplifier 502 have been changed. For example, FIG. 7 to FIG. 9The second vibration generator 230 shown can be disposed at or attached to the first vibration generator 210 in a state of vertical inversion, and thus, in order to displace the 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 can not need to be changed between them. Thus, 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, and thus, 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. Similarly, the first output terminal T21 of the second amplifier 502 can 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 can be electrically connected to the second electrode portion 211c of the second vibration generator 230.

[0501] In FIG. 7 to FIG. 9 In the description and the description related thereto, the vibration device 200 according to another embodiment of the disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but embodiments of the disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the disclosure can include a plurality (e.g., three or more) of 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 can include a first group and a second group.

[0502] As an embodiment of the disclosure, the vibration generators 210 of the first group (e.g., the vibration generators of odd numbers) can be displaced in a state of non-vertical inversion, and the vibration generators 230 of the second group (e.g., the vibration generators of even numbers) can be displaced in a state of vertical inversion. For example, the first electrode portion 211b of the vibration generator 210 of the first group can 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 can be disposed closer to the display panel 100 than the first electrode portion 211b.

[0503] As another embodiment of the present disclosure, the vibration generators 210 of the first group (e.g., the odd-numbered vibration generators) can be shifted in a state of vertical inversion, and the vibration generators 230 of the second group (e.g., the even-numbered vibration generators) can be shifted in a state of non-vertical inversion. For example, the second electrode portion 211c of the vibration generators 210 of the first group can be disposed closer to the display panel 100 than the first electrode portion 211b, and the first electrode portion 211b of the vibration generators 230 of the second group can be disposed closer to the display panel 100 than the second electrode portion 211c.

[0504] According to another embodiment of the present disclosure, the vibration driving circuit 500 can 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 can provide a vibration driving signal for shifting each of the three or more vibration generators 210 and 230 in the same direction. For example, the first vibration driving signal from the first output terminals T11 and T21 of the respective amplifiers 501 and 502 of the three or more amplifiers 501 and 502 can be provided to the first electrode portion 211b of each of the three or more vibration generators 210 and 230. The second vibration driving signal from the second output terminals T12 and T22 of the respective amplifiers 501 and 502 of the three or more amplifiers 501 and 502 can be provided to the second electrode portion 211c of each of the three or more vibration generators 210 and 230.

[0505] FIG. 10 A vibration device according to another embodiment of the present disclosure is illustrated. FIG. 11 A vibration device according to another embodiment of the present disclosure is illustrated. FIG. 10 The illustrated vibration portion. FIG. 12A to FIG. 12C is taken along a line IV-IV’ in FIG. FIG. 10 is a cross-sectional view taken along a line IV-IV’ in FIG. FIG. 2 to FIG. 5 is a cross-sectional view taken along a line IV-IV’ in FIG. FIG. 7 to FIG. 9 is a cross-sectional view taken along a line IV-IV’ in FIG.

[0506] Referring to FIG. 10 to FIG. 12C 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 can include a vibration portion 211a, a first electrode portion 211b, and a second electrode portion 211c.

[0507] The vibrating portion 211a may include a piezoelectric material, a composite piezoelectric material, or an electroactive material, and the piezoelectric material, composite piezoelectric material, and electroactive material may have a piezoelectric effect. The vibrating portion 211a may include inorganic and organic materials. For example, the vibrating portion 211a may include multiple inorganic material portions configured as piezoelectric materials and at least one organic material portion configured as a flexible material. For example, the vibrating portion 211a may be referred to as a piezoelectric vibrating portion, a piezoelectric vibrating layer, a piezoelectric displacement portion, a piezoelectric displacement layer, a sound wave generating portion, a sound wave generating layer, a piezoelectric composite material layer, a piezoelectric composite material, or a piezoelectric ceramic composite material, but embodiments of this disclosure are not limited thereto. The vibrating portion 211a may be formed of a transparent, translucent, or opaque piezoelectric material, and the vibrating portion 211a may be transparent, translucent, or opaque. The vibration structure 211, including each of the vibration part 211a or vibration generators 210 and 230, may be referred to as a diaphragm, displacement generator, sound generator, flexible vibration generator, flexible actuator, flexible loudspeaker, flexible piezoelectric loudspeaker, thin film actuator, thin film piezoelectric composite actuator, thin film loudspeaker, thin film piezoelectric loudspeaker, thin film piezoelectric composite loudspeaker, etc., but the embodiments of this disclosure are not limited thereto.

[0508] The vibration portion 211a according to embodiments of the present disclosure may include a plurality of first portions 211a1 and a plurality of second portions 211a2. For example, the plurality of first portions 211a1 and the plurality of second portions 211a2 may be arranged alternately and repeatedly along a first direction X (or a second direction Y). For example, the first direction X may be the width direction of the vibration portion 211a, and the second direction Y may be the length direction of the vibration portion 211a, but embodiments of the present disclosure are not limited thereto. For example, the first direction X may be the length direction of the vibration portion 211a, and the second direction Y may be the width direction of the vibration portion 211a.

[0509] Each of the plurality of first portions 211a1 can be configured as an inorganic material portion. The inorganic material portion may include the piezoelectric material described above. For example, each of the plurality of first portions 211a1 may include a piezoelectric material, as described above. FIG. 3 and FIG. 4 The vibration part 211a described is basically the same, so its repeated description can be omitted.

[0510] Each of the plurality of first portions 211a1 according to the embodiment of the disclosure can be disposed between the plurality of second portions 211a2. Each of the plurality of second portions 211a2 can be disposed (or arranged) in parallel to each other, with the first portions 211a1 therebetween. For example, the plurality of first portions 211a1 can 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 can have a second width W2 parallel to the first direction X (or the second direction Y) and can have a length parallel to the second direction Y (or the first direction X). The first width W1 can be the same as or different from the second width W2. For example, the first width W1 can be greater than the second width W2. Each of the plurality of first portions 211a1 can have the same size, for example, the same width, area, or volume. For example, each of the plurality of first portions 211a1 can have the same size (for example, the same width, area, or volume) within a process error range (or tolerance) that occurs in a manufacturing process. For example, the first portions 211a1 and the second portions 211a2 can include linear or bar shapes having the same size or different sizes. Accordingly, the vibration portion 211a can include a 2-2 composite structure and thus can have a resonance frequency of 20 kHz or less, but embodiments of the disclosure are not limited thereto. For example, the resonance frequency of the vibration portion 211a can vary based on at least one or more of a shape, a length, and a thickness. For example, the first portions 211a1 can be referred to as piezoelectric portions, piezoelectric elements, piezoelectric layers, vibration layers, displacement elements, displacement layers, inorganic portions, or inorganic material portions, but embodiments of the disclosure are not limited thereto.

[0511] In the vibration portion 211a, the plurality of first portions 211a1 and the plurality of second portions 211a2 can be disposed (or arranged) in parallel on the same plane (or the same layer). The plurality of first portions 211a1 and the plurality of second portions 211a2 can be disposed (or arranged) in parallel on the same plane (or the same layer) and can be connected or coupled to each other. Each of the plurality of second portions 211a2 can fill a gap between two adjacent first portions 211a1 of the plurality of first portions 211a1. Each of the plurality of second portions 211a2 can be connected to or attached to the first portions 211a1 adjacent thereto. For example, each of the plurality of second portions 211a2 can be configured to fill a gap between two adjacent first portions 211a1 and can be connected or attached to the adjacent second portions 211a2. Accordingly, the vibration portion 211a can extend a desired size or length based on the side coupling (or connection) of the first portions 211a1 and the second portions 211a2.

[0512] In the vibration portion 211a, the width (or size) W2 of each of the plurality of second portions 211a2 can gradually decrease in a direction from a central portion of the vibration portion 211a to two peripheral portions (or both ends).

[0513] According to embodiments of the present disclosure, the second portion 211a2 of the plurality of second portions 211a2 having the largest width W2 can be located at a portion where the maximum stress can be concentrated when the vibration portion 211a is vibrated in the vertical (or up-down) direction Z (or thickness direction). The second portion 211a2 of the plurality of second portions 211a2 having the smallest width W2 can be disposed at a portion where a relatively small stress can occur when the vibration portion 211a is vibrated in the vertical direction Z. For example, the second portion 211a2 of the plurality of second portions 211a2 having the largest width W2 can be disposed at a central portion of the vibration portion 211a, and the second portion 211a2 of the plurality of second portions 211a2 having the smallest width W2 can be disposed at one or more of the two peripheral portions of the vibration portion 211a. Accordingly, when the vibration portion 211a is vibrated in the vertical direction Z, interference of sound waves occurring in a portion where the maximum stress is concentrated or overlapping of resonance frequencies can be reduced or minimized. Accordingly, a dip phenomenon of a sound pressure level occurring in a low-pitch sound band can be reduced, thereby improving flatness of sound characteristics in the low-pitch sound band. For example, the flatness of sound characteristics can be a level of deviation between a highest sound pressure level and a lowest sound pressure level.

[0514] In the vibration portion 211a, each of the plurality of first portions 211a1 can have a different size (or width). For example, the size (or width) of each of the plurality of first portions 211a1 can gradually decrease or increase in a direction from a central portion of the vibration portion 211a to two peripheral portions (or both ends). In the vibration portion 211a, based on various natural vibration frequencies according to vibration of each of the plurality of first portions 211a1 having different sizes, a sound pressure level characteristic of sound can be enhanced and a sound reproduction band can be increased.

[0515] Each of the plurality of second portions 211a2 can be disposed between the plurality of first portions 211a1. Accordingly, in the vibration portion 211a, vibration energy of a link in a unit lattice of the first portion 211a1 can increase the corresponding second portion 211a2. Accordingly, vibration characteristics can be increased, and piezoelectric characteristics and flexibility can be ensured. For example, the second portion 211a2 can include one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but embodiments of the present disclosure are not limited thereto.

[0516] The plurality of second portions 211a2 according to the embodiments of the disclosure can be configured as organic material portions. For example, the organic material portions can be disposed between the inorganic material portions and can absorb an impact applied to the inorganic material portions (or first portions), can release stress concentrated on the inorganic material portions to improve the overall durability of the vibration portion 211a, and can provide flexibility to the vibration portion 211a.

[0517] The plurality of second portions 211a2 according to the embodiments of the disclosure can have a modulus and viscoelasticity lower than those of the first portion 211a1, and thus the second portions 211a2 can enhance the reliability of the first portion 211a1 vulnerable to impact due to the fragile characteristic.

[0518] For example, when the vibration device 200 for vibrating the display panel 100 has impact resistance and high stiffness, the vibration device 200 can have high vibration characteristics or maximum vibration characteristics. To make the vibration device 200 have impact resistance and high stiffness, each of the plurality of second portions 211a2 can include a material having a relatively high damping factor (tan δ) and a relatively high stiffness. For example, each of the plurality of second portions 211a2 can include a material having a damping factor (tan δ) of about 0.1 [GPa] to about 1 [GPa] and a relatively high stiffness of about 0 [GPa] to about 10 [GPa]. In addition, the damping factor (tan δ) and the stiffness characteristic can be described based on the correlation between the loss coefficient and the modulus. For example, the second portion 211a2 can include a material having a loss coefficient of about 0.01 to about 1.0 and a modulus of about 0.1 [GPa] to about 10 [GPa].

[0519] The organic material portions included in the second portions 211a2 can include one or more of an organic material, an organic polymer, an organic piezoelectric material, and an organic non-piezoelectric material having a flexible characteristic compared to the inorganic material portions of the first portion 211a1. For example, the second portion 211a2 can be referred to as an elastic portion, an elastic force portion, a connection portion, an organic portion, an organic material portion, an adhesive portion, a stretch portion, a bending portion, a damping portion, or a flexible portion, but embodiments of the disclosure are not limited thereto.

[0520] The organic material portion including the organic piezoelectric material can absorb an impact applied to the inorganic material portion (or the first portion 211a1). Accordingly, the organic material portion can enhance the overall durability of the vibration device 200 and can provide piezoelectric properties corresponding to a certain level or higher. For example, the organic piezoelectric material according to an embodiment of the disclosure can be an organic material. The organic piezoelectric material according to an embodiment of the disclosure can be an organic material having an electroactive property. For example, the organic piezoelectric material can include at least one of polyvinylidene fluoride (PVDF), β-polyvinylidene fluoride (β-PVDF), and polyvinylidene fluoride (PVDF-TrFE), but embodiments of the disclosure are not limited thereto.

[0521] The organic material portion including the organic non-piezoelectric material can include a curable resin composition and an adhesive including the curable resin composition. Accordingly, the organic material portion can absorb an impact applied to the inorganic material portion (or the first portion), thereby improving the overall durability of the vibration device 200. The organic non-piezoelectric material according to an embodiment of the disclosure can include at least one of an epoxy-based polymer, an acryl-based polymer, and a silicon-based polymer, but embodiments of the disclosure are not limited thereto.

[0522] For example, in order to the high stiffness properties of the vibration device 200, the organic material portion including the organic non-piezoelectric material can include an adhesion enhancer or an adhesion reinforcing agent for adhesion between the epoxy resin and the inorganic material portion. For example, the adhesion enhancer can be a phosphate or the like, but embodiments of the disclosure are not limited thereto. The organic material portion can be cured by at least one of a thermal curing process and a photo-curing process. In a process of curing the organic material portion, a solvent-free type epoxy resin can be used to avoid or prevent a decrease in thickness uniformity of the vibration device 200 due to shrinkage of the organic material portion caused by volatilization of a solvent.

[0523] The organic material portion including the organic non-piezoelectric material can further include a reinforcing agent, for example, a reinforcing agent for the damping properties and the high stiffness of the vibration device 200. For example, the reinforcing agent can be a methyl methacrylate-butadiene-styrene (MBS) having a core-shell type, and the content thereof can be about 5 wt% to about 40 wt%. The reinforcing agent can be an elastomer having a core cell type, and can have a high coupling force with an epoxy resin (for example, an acrylic polymer). Accordingly, the reinforcing agent can enhance the impact resistance or the damping properties of the vibration device 200.

[0524] The plurality of first portions 211a1 and the second portion 211a2 can be disposed (or connected to) the same plane, and thus the vibration portion 211a according to the embodiment of the disclosure can have a single thin film type. For example, the vibration portion 211a can have a structure in which the plurality of first portions 211a1 is connected to one side of the vibration portion 211a. For example, the plurality of first portions 211a1 can have a structure connected to the entire vibration portion 211a. For example, the vibration portion 211a can vibrate in a vertical (or up-down) direction (or a thickness direction) by the first portion 211a1 having a vibration characteristic with respect to a width direction of the display panel 100, and can be bent into a curved shape by the second portion 211a2 having flexibility. Also, in the vibration portion 211a according to the embodiment of the disclosure, the size of the first portion 211a1 and the size of the second portion 211a2 can be adjusted based on a piezoelectric characteristic and flexibility required for the vibration portion 211a. As an embodiment of the disclosure, when the vibration portion 211a requires a piezoelectric characteristic rather than flexibility, the size of the first portion 211a1 can be adjusted to be greater than the second portion 211a2. As another embodiment of the disclosure, when the vibration portion 211a requires flexibility rather than a piezoelectric characteristic, the size of the second portion 211a2 can be adjusted to be greater than the first portion 211a1. Thus, the size of the vibration portion 211a can be adjusted based on a characteristic required for the vibration portion 211a, and thus the vibration portion 211a can be easily designed.

[0525] To maximize or increase the displacement amount or amplitude displacement of the vibration device 200, the vibration structures 211 of the first vibration generator 210 and the vibration structures 211 of the second vibration generator 230 can have the same size and can overlap each other. For example, the first portion (or end, or end, or outer surface, or each corner) 210a of the vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 can be substantially aligned or overlapped with the second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 without staggering. For example, the first portion (or end, or end, or outer surface, or each corner) 210a of the vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 can be substantially aligned or overlapped with the second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 without staggering within the error range of the manufacturing process. For example, the first portion (or end, or end, or outer surface, or each corner) 210a of each vibration structure 211 (or the vibration portion 211a) of the first vibration generator 210 can be aligned on the first virtual extension line VL1, or can be disposed at the first virtual extension line VL1. The second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 can be precisely aligned on the first virtual extension line VL1, or can be precisely disposed at the first virtual extension line VL1. The second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 can be aligned on the first virtual extension line VL1, or can be disposed at the first virtual extension line VL1. The second portion (or end, or end, or outer surface, or each corner) 230a of each vibration structure 211 (or the vibration portion 211a) of the second vibration generator 230 can be precisely aligned on the first virtual extension line VL1, or can be precisely disposed at the first virtual extension line VL1.

[0526] According to an embodiment of the disclosure, the plurality of second portions 211a2 of the first vibration generator 210 and the plurality of second portions 211a2 of the second vibration generator 230 can have the same size as each other, and can be substantially overlapped or stacked without being staggered. For example, the plurality of second portions 211a2 of the first vibration generator 210 and the plurality of second portions 211a2 of the second vibration generator 230 can have the same size as each other, and can be substantially overlapped or stacked within an error range of a manufacturing process without being staggered. According to an embodiment of the disclosure, each of the plurality of second portions 211a2 of the first vibration generator 210 can be substantially overlapped or stacked with each of the plurality of second portions 211a2 of the second vibration generator 230. For example, each of the plurality of second portions 211a2 of the first vibration generator 210 and each of the plurality of second portions 211a2 of the second vibration generator 230 can be aligned on or disposed at the second virtual extension line VL2. For example, each of the plurality of second portions 211a2 of the first vibration generator 210 and each of the plurality of second portions 211a2 of the second vibration generator 230 can be aligned on or disposed at the second virtual extension line VL2 without being staggered. For example, each of the plurality of second portions 211a2 of the first vibration generator 210 and each of the plurality of second portions 211a2 of the second vibration generator 230 can be precisely aligned on or precisely disposed at the second virtual extension line VL2 within an error range of a manufacturing process. Accordingly, in the vibration device 200 according to an embodiment of the disclosure, the vibration portions 211a of the first vibration generator 210 and the vibration portions 211a of the second vibration generator 230 can be displaced in the same direction, and thus, a displacement amount or an amplitude displacement of the vibration device 200 can be maximized or increased, and thus, a displacement amount (or a bending force or a flexing force) or an amplitude displacement of the display panel 100 can be increased (or maximized).

[0527] The first electrode portion 211b can be disposed at a first surface (or a top surface) of the vibration portion 211a. For example, the first electrode portion 211b can be collectively disposed at 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 can be electrically connected to the first surface of each of the plurality of first portions 211a1. For example, the first electrode portion 211b can be disposed at the entire first surface of the vibration portion 211a. The first electrode portion 211b can have a single electrode type. For example, the first electrode portion 211b can have substantially the same shape 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 can 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.

[0528] The second electrode portion 211c can be disposed at a second surface (or a back surface) opposite or different from the first surface of the vibration portion 211a. The second electrode portion 211c can be collectively disposed at 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 can be electrically connected to the second surface of each of the plurality of first portions 211a1. For example, the second electrode portion 211c can be disposed at the entire second surface of the vibration portion 211a. The second electrode portion 211c can have a single electrode type. For example, the second electrode portion 211c can have substantially the same shape 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 can 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.

[0529] The first electrode portion 211b can be covered by the first protective member 213 described above. The second electrode portion 211c can be covered by the second protective member 215 described above.

[0530] The vibration portion 211a of each of the first vibration generator 210 and the second vibration generator 230 can be polarized (or polarize) in a certain temperature atmosphere or a temperature atmosphere changing from a high temperature to a room temperature by a certain voltage applied to the first electrode portion 211b and the second electrode portion 211c, but embodiments of the present disclosure are not limited thereto. For example, the vibration portion 211a of each of the first vibration generator 210 and the second vibration generator 230 can alternately and repeatedly contract and expand based on a converse piezoelectric effect according to a vibration driving signal applied from the outside to the first electrode portion 211b and the second electrode portion 211c, and thus can vibrate. For example, the vibration portion 211a of each of the first vibration generator 210 and the second vibration generator 230 can vibrate based on a vertical direction (or thickness direction Z) vibration d33 and a horizontal direction (or planar direction) vibration d31 according to a vibration driving signal applied to the first electrode portion 211b and the second electrode portion 211c. The vibration portion 211a can increase the displacement of the vibration device 200 by contracting and expanding in the horizontal direction, and thus further improve the vibration of the vibration device 200 or the display panel.

[0531] In FIG. 10 to FIG. 12CIn the description and the accompanying drawings related thereto, the vibration device 200 according to another embodiment of the disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but embodiments of the disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the disclosure can include a plurality (e.g., three or more) 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 can have the same size and can be overlapped or stacked. According to an embodiment of the disclosure, the first portion 211a1 of the vibration generator 210 disposed in the upper layer (or top layer) among the three or more vibration generators 210 and 230 and the first portion 211a1 of the vibration generator 230 disposed in the lower layer (or bottom layer) among the three or more vibration generators 210 and 230 can be substantially overlapped or stacked without being staggered. For example, the first portion 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first portion 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 being staggered within the error range of the manufacturing process. For example, the first portion 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first portion 211a1 of the vibration generator 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be aligned on or disposed at a virtual extension line VL. For example, the first portion 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first portion 211a1 of the vibration generator 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be precisely aligned on or precisely disposed at the virtual extension line VL. For example, the first portion 211a1 of the vibration generator 210 disposed closer to the first surface of the display panel 100 overlaps the first portion 211a1 of another vibration generator 230 disposed less close to the front surface of the display panel 100. Also, the second portion 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portion 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 being staggered. For example, the second portion 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portion 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 being staggered within the error range of the manufacturing process.For example, the second portions 211a2 of the vibration generators 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portions 211a2 of the vibration generators 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be aligned on or disposed at the virtual extension line VL. For example, the second portions 211a2 of the vibration generators 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portions 211a2 of the vibration generators 230 disposed in the lower layer among the three or more vibration generators 210 and 230 can be precisely aligned on or precisely disposed at the virtual extension line VL. For example, the second portion 211a2 of the vibration generator 210 disposed closer to the front surface of the display panel 100 overlaps the second portion 211a2 of another vibration generator 230 disposed less close to the front surface of the display panel 100.

[0532] Referring to FIG. 12A to FIG. 12C One or more of the first vibration generator 210 and the second vibration generator 230 can include a first power line PL1 and a second power line PL2.

[0533] Referring to FIG. 12A and FIG. 12B The first power line PL1 of the first vibration generator 210 and the second vibration generator 230 can be disposed at the first protective member 213 and can be electrically connected to the first electrode portion 211b. For example, the first power line PL1 can be disposed at the rear surface of the first protective member 213 facing the first electrode portion 211b and can be electrically connected to the first electrode portion 211b. For example, the first power line PL1 can be disposed at the rear surface of the first protective member 213 directly facing the first electrode portion 211b and can be electrically connected to the first electrode portion 211b. For example, the first power line PL1 can be disposed at the rear surface of the first protective member 213 directly facing the first electrode portion 211b and can be directly electrically connected to the first electrode portion 211b. The second power line PL2 of the first vibration generator 210 and the second vibration generator 230 can be disposed at the second protective member 215 and can be electrically connected to the second electrode portion 211c. For example, the second power line PL2 can be disposed at the rear surface of the second protective member 215 facing the second electrode portion 211c and can be electrically connected to the second electrode portion 211c. For example, the second power line PL2 can be disposed at the rear surface of the second protective member 215 directly facing the second electrode portion 211c and can be electrically connected to the second electrode portion 211c. For example, the second power line PL2 can be disposed at the rear surface of the second protective member 215 directly facing the second electrode portion 211c and can be directly electrically connected to the second electrode portion 211c.

[0534] Referring to FIG. 12B , the first power line PL1 of the first vibration generator 210 and the second vibration generator 230 can be disposed to the right and can be disposed with respect to the first direction X. The second power line PL2 of the first vibration generator 210 and the second vibration generator 230 can be disposed to the left and can be disposed with respect to the first direction X. FIG. 12A

[0535] Referring to FIG. 12C , the first power line PL1 of the first vibration generator 210 and the second vibration generator 230 can be disposed at the second protective member 215 and can be electrically connected to the second electrode portion 211c. For example, the first power line PL1 can be disposed at the rear surface of the second protective member 215 facing the second electrode portion 211c and can be electrically connected to the second electrode portion 211c. For example, the first power line PL1 can be disposed at the rear surface of the second protective member 215 directly facing the second electrode portion 211c and can be directly electrically connected to the second electrode portion 211c.

[0536] The second power line PL2 of the first vibration generator 210 and the second vibration generator 230 can be disposed at the first protective member 213 and can be electrically connected to the first electrode portion 211b. For example, the second power line PL2 can be disposed at the rear surface of the first protective member 213 facing the first electrode portion 211b and can be electrically connected to the first electrode portion 211b. For example, the second power line PL2 can be disposed at the rear surface of the first protective member 213 directly facing the first electrode portion 211b and can be directly electrically connected to the first electrode portion 211b. For example, the first power line PL1 can be connected to the first electrode portion 211b or the second electrode portion 211c, and the second power line PL2 can be connected to the first electrode portion 211b or the second electrode portion 211c. For example, the first power line PL1 can be connected to one of the first electrode portion 211b and the second electrode portion 211c, and the second power line PL2 can be connected to the other of the first electrode portion 211b or the second electrode portion 211c.

[0537] ​According to another embodiment of the disclosure, the first power line PL1 of the first vibration generator 210 can not overlap the first power line PL1 of the second vibration generator 230. The second power line PL2 of the first vibration generator 210 can not overlap the second power line PL2 of the second vibration generator 230. For example, the second power line PL2 can be spaced apart from the first power line PL1 in a plane parallel to the front surface and the rear surface of the display panel 100 (or the vibration member). Accordingly, disconnection due to overlapping of the power lines can be addressed, and a problem in which the thickness of the vibration device is thickened due to an increase in thickness caused by overlapping of the power lines can be addressed. Such a description can be equally applied to FIG. 4 and FIG. 8 .

[0538] FIG. 13 A vibration device according to another embodiment of the disclosure is illustrated, and an embodiment implemented by modifying the vibration part described above with reference to FIG. 10 to FIG. 12C is illustrated. Accordingly, in the following description, repeated description of elements other than the vibration part will be omitted or will be briefly given.

[0539] Referring to FIG. 13 , in the vibration device 200 according to another embodiment of the disclosure, the vibration part 211a including the vibration structure 211 in each of the vibration generators 210 and 230 can 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 can be disposed to be spaced apart from each other along each of the first direction X and the second direction Y.

[0540] Each of the plurality of first parts 211a1 can 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 parts 211a1 can have a hexahedral shape (or a hexagonal object shape) having the same size, and can be disposed in a lattice shape. Each of the plurality of first parts 211a1 can include substantially the same material as the vibration part 211a described above with reference to FIG. 3 and FIG. 4 , and the first part 211a1 described above with reference to FIG. 10 to FIG. 12C , and thus the same reference numerals denote the same elements, and repeated description thereof can be omitted.

[0541] The second portion 211a2 can be disposed between a plurality of the first portions 211a1 along each of the first direction X and the second direction Y. The second portion 211a2 can be configured to fill a gap or a space between two adjacent first portions 211a1 or to surround each of the plurality of first portions 211a1, and thus can be connected or attached to the adjacent first portions 211a1. According to an embodiment of the disclosure, a width of the second portion 211a2 disposed between two first portions 211a1 adjacent to each other along the first direction X can be the same as or different from a width of the first portion 211a1, and a width of the second portion 211a2 disposed between two first portions 211a1 adjacent to each other along the second direction Y can be the same as or different from a width of the first portion 211a1. The second portion 211a2 can include substantially the same material as the first portion 211a1 described above with reference to FIGS. 1A and 1B, and thus the same reference numerals denote the same elements, and a repeated description thereof can be omitted. FIG. 10 to FIG. 12C The second portion 211a2 described above is substantially the same material, and thus the same reference numerals denote the same elements, and a repeated description thereof can be omitted.

[0542] In FIG. 13In the description and the accompanying drawings related thereto, the vibration device 200 according to another embodiment of the disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but embodiments of the disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the disclosure can include a plurality (e.g., three or more) 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 can have the same size and can be overlapped or stacked. According to an embodiment of the disclosure, the first portion 211a1 of the vibration generator 210 disposed in the upper layer (or top layer) among the three or more vibration generators 210 and 230 and the first portion 211a1 of the vibration generator 230 disposed in the lower layer (or bottom layer) among the three or more vibration generators 210 and 230 can be substantially overlapped or stacked without being staggered. For example, the first portion 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first portion 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 being staggered within the error range of the manufacturing process. For example, the first portion 211a1 of the vibration generator 210 disposed closer to the front surface of the display panel 100 (or the vibration member) can be overlapped, and the first portion 211a1 of the vibration generator 230 disposed less close to the front surface of the display panel 100 (or the vibration member) can be overlapped. Also, the second portion 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portion 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 being staggered. For example, the second portion 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portion 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 being staggered within the error range of the manufacturing process. For example, the second portion 211a2 of the vibration generator 210 disposed closer to the front surface of the display panel 100 (or the vibration member) can be overlapped, and the second portion 211a2 of the vibration generator 230 disposed less close to the front surface of the display panel 100 (or the vibration member) can be overlapped.

[0543] Accordingly, the vibration portion 211a of each of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the disclosure can include a 1-3 composite structure, and thus can have a resonance frequency of 30 MHz or less, but embodiments of the disclosure are not limited thereto. For example, the resonance frequency of the vibration portion 211a can vary based on one or more of a shape, a length, and a thickness.

[0544] FIG. 14 A vibration device according to another embodiment of the disclosure is illustrated, and an embodiment of a vibration portion illustrated in FIG. 1 is modified. FIG. 10 to FIG. 12C Accordingly, in the following, repeated descriptions of elements other than the vibration portion can be omitted or briefly given.

[0545] Referring to FIG. 14 In the vibration device 200 according to another embodiment of the disclosure, the vibration portion 211a of the vibration structure 211 included in each of the vibration generators 210 and 230 can include a plurality of first portions 211a1 and a second portion 211a2 disposed between the plurality of first portions 211a1. The plurality of first portions 211a1 can be spaced apart from each other along the first direction X and the second direction Y.

[0546] Each of the plurality of first portions 211a1 according to an embodiment of the disclosure can have a flat structure of a circular shape. For example, each of the plurality of first portions 211a1 can have a circular plate shape, but embodiments of the disclosure are not limited thereto. For example, each of the plurality of first portions 211a1 can have a point shape including an elliptical shape, a polygonal shape, or a ring shape. Each of the plurality of first portions 211a1 can include substantially the same material as the vibration portion 211a described above with reference to FIG. 3 and FIG. 4 described above with reference to FIG. 10 to FIG. 12C described above with reference to

[0547] The second portion 211a2 can 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 can be configured to surround each of the plurality of first portions 211a1, and thus can be connected to or attached on 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 can be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 211a2 can include substantially the same material as the vibration portion 211a described above with reference to FIG. 10 to FIG. 12CThe second part 211a2 is substantially the same material as described, and thus the same reference numerals denote the same elements, and their repeated description can be omitted.

[0548] In the vibration part 211a of each of the vibration generators 210 and 230 according to another embodiment of the disclosure, each of the plurality of first parts 211a1 can have a flat structure of a triangular shape, instead of a flat structure of a circular shape. For example, each of the plurality of first parts 211a1 can have a triangular plate shape.

[0549] According to an embodiment of the disclosure, four adjacent first parts 211a1 of the plurality of first parts 211a1 can be adjacent to each other to form a quadrangular shape or a quadrilateral shape (or a square shape). The vertices of the four adjacent first parts 211a1 forming the quadrangular shape can be adjacent to each other in a central part (or a center part) of the quadrilateral shape.

[0550] According to another embodiment of the disclosure, six adjacent first parts 211a1 of the plurality of first parts 211a1 can be adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). The vertices of the six adjacent first parts 211a1 forming the hexagonal shape can be adjacent to each other in a central part (or a center part) of the hexagonal shape.

[0551] In FIG. 14In the description and the related description thereof, the vibration device 200 according to another embodiment of the disclosure has been described as including the first vibration generator 210 and the second vibration generator 230, but embodiments of the disclosure are not limited thereto. For example, the vibration device 200 according to another embodiment of the disclosure can include a plurality (e.g., three or more) 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 can have the same size and can be overlapped or stacked. According to an embodiment of the disclosure, the first portion 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first portion 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 being staggered. For example, the first portion 211a1 of the vibration generator 210 disposed closer to the front surface of the display panel 100 (or the vibration member) can be overlapped, and the first portion 211a1 of the vibration generator 230 disposed less closer to the front surface of the display panel 100 (or the vibration member) can be overlapped. For example, the first portion 211a1 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the first portion 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 being staggered within the error range of the manufacturing process. Also, the second portion 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portion 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 being staggered. For example, the second portion 211a2 of the vibration generator 210 disposed in the upper layer among the three or more vibration generators 210 and 230 and the second portion 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 being staggered within the error range of the manufacturing process. For example, the second portion 211a2 of the vibration generator 210 disposed closer to the front surface of the display panel 100 (or the vibration member) can be overlapped, and the second portion 211a2 of the vibration generator 230 disposed less closer to the front surface of the display panel 100 (or the vibration member) can be overlapped.

[0552] Accordingly, the vibration portion 211a of each of the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the disclosure can include a 1-3 composite structure, and can be implemented as a circular vibration source (or vibrator). Accordingly, a vibration characteristic or a sound output characteristic can be enhanced, and the vibration portion 211a can have a resonance frequency of 30 MHz or less, but the embodiment of the disclosure is not limited thereto. For example, the resonance frequency of the vibration portion 211a can vary based on one or more of a shape, a length, and a thickness.

[0553] FIG. 15 A vibration device according to another embodiment of the disclosure is illustrated. FIG. 16A to FIG. 16E is a cross-sectional view taken along FIG. 15 the line V-V' shown in FIG. FIG. 10 to FIG. 12C The vibration generator shown in FIG.

[0554] Referring to FIG. 15 to FIG. 16E In the vibration device according to another embodiment of the disclosure, each of the first vibration generator 210 and the second vibration generator 230 can include at least one or more vibration structures 200A to 200D or a plurality of vibration structures 200A to 200D. FIG. 15 to FIG. 16E An example including four vibration structures is illustrated, and each of the first vibration generator 210 and the second vibration generator 230 according to the embodiment of the disclosure can be configured to include one or two or more vibration structures.

[0555] The plurality of vibration structures 200A to 200D can be spaced apart from each other in each of the first direction X and the second direction Y. For example, the plurality of vibration structures 200A to 200D can be electrically separated and disposed while being spaced apart from each other in each of the first direction X and the second direction Y. For example, each of the plurality of vibration structures 200A to 200D can be a vibration array, a vibration generation array, a partitioned vibration array, a partial vibration array, a partitioned vibration structure, a partial vibration structure, a separate vibration structure, a vibration module, a vibration module array portion, a vibration array structure, a vibration membrane, a shift generator, a vibration membrane, a shift structure, a sound generation structure, a sound generator, a tiled vibration array, a tiled vibration array module, or a tiled vibration membrane, but the embodiment of the disclosure is not limited thereto.

[0556] Each of the plurality of vibration structures 200A to 200D can alternately and / or repeatedly contract and expand based on a piezoelectric effect, thereby vibrating. Each of the plurality of vibration structures 200A to 200D can be arranged or tiled at a certain interval. Accordingly, each of the plurality of vibration structures 200A to 200D tiled with the first vibration generator 210 and the second vibration generator 230 can be referred to as a vibration membrane, a displacement generator, a displacement membrane, a displacement structure, a sound generating structure, a sound generator, a tiled vibration array, a tiled vibration array module, or a tiled vibration membrane, but embodiments of the present disclosure are not limited thereto.

[0557] Each of the plurality of vibration structures 200A to 200D according to embodiments of the present disclosure can have a quadrangular shape. For example, each of the plurality of vibration structures 200A to 200D can have a quadrangular shape with a width of about 5 cm or more. For example, each of the plurality of vibration structures 200A to 200D can have a square shape with a size of 5 cm x 5 cm or more.

[0558] The plurality of vibration structures 200A to 200D can be arranged or tiled at a certain interval (or distance), and thus can be implemented as one vibration device (or a single vibration device or one vibration device) that is driven as one complete monolith without being driven independently. For example, the plurality of vibration structures 200A to 200D can be electrically separated and spaced apart from each other by a distance. According to embodiments of the present disclosure, a first separation distance D1 between the plurality of vibration structures 200A to 200D with respect to the first direction X can be 0.1 mm or more and less than 3 cm, but embodiments of the present disclosure are not limited thereto. Also, a second separation distance D2 between the plurality of vibration structures 200A to 200D with respect to the second direction Y can be 0.1 mm or more and less than 3 cm, but embodiments of the present disclosure are not limited thereto. For example, the first separation distance D1 can be the same as the second separation distance D2. For example, the first separation distance D1 can be the same as the second separation distance D2 within a process error range.

[0559] According to embodiments of the present disclosure, the plurality of vibration structures 200A to 200D can be arranged or tiled to have separation distances (or intervals) D1 and D2 of 0.1 mm or more and less than 3 cm, and thus can be driven as one vibration device, thereby increasing a reproduction frequency band and a sound pressure level characteristic of sound generated based on a single vibration of the plurality of vibration structures 200A to 200D. For example, the plurality of vibration structures 200A to 200D can be arranged at an interval of 0.1 mm or more and less than 5 mm to increase a reproduction frequency band of sound generated based on a single vibration of the plurality of vibration structures 200A to 200D and to increase sound of a bass sound band (e.g., a sound pressure level characteristic in 500 Hz or less).

[0560] According to embodiments of the present disclosure, in a case in which the plurality of vibration structures 200A to 200D are arranged with an interval (or distance) D1 and D2 of less than 0.1 mm or are arranged without the interval (or distance) D1 and D2, the reliability of each of the vibration structures 200A to 200D or the first vibration generator 210 and the second vibration generator 230 can be reduced due to damage or cracks caused by physical contact between them when each of the vibration structures 200A to 200D vibrates.

[0561] According to embodiments of the present disclosure, in a case in which the plurality of vibration structures 200A to 200D are arranged with an interval (or distance) D1 and D2 of 3 cm or more, the plurality of vibration structures 200A to 200D can not be driven as one vibration device due to independent vibrations of each of the plurality of vibration structures 200A to 200D. Accordingly, the reproduction band and the sound pressure level characteristics of sound generated based on the vibrations of the plurality of vibration structures 200A to 200D can be reduced. For example, in a case in which the plurality of vibration structures 200A to 200D are arranged with an interval (or distance) D1 and D2 of 3 cm or more, the sound characteristics and the sound pressure level characteristics of low-pitch sound bands (e.g., 500 Hz or less) can be reduced, respectively.

[0562] According to embodiments of the present disclosure, in a case in which the plurality of vibration structures 200A to 200D are arranged with an interval (or distance) of 5 mm, each of the plurality of vibration structures 200A to 200D can not be perfectly driven as one vibration device, and thus each of the sound characteristics and the sound pressure level characteristics of low-pitch sound bands (e.g., 200 Hz or less) can be reduced.

[0563] According to another embodiment of this disclosure, when multiple vibrating structures 200A to 200D are arranged at intervals (or distances) of 1 mm, each of the multiple vibrating structures 200A to 200D can be driven as a vibration device. Therefore, the sound reproduction frequency band can be increased, and the sound of the low-pitched sound band (e.g., a sound pressure level characteristic of 500 Hz or below) can be amplified. For example, when multiple vibrating structures 200A to 200D are arranged at intervals (or distances) of 1 mm, each of the first vibration generator 210 and the second vibration generator 230 can be implemented as a large-area vibrator amplified based on the optimized separation distance between the multiple vibrating structures 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 the individual vibration of the multiple vibrating structures 200A to 200D. Therefore, both sound characteristics and sound pressure level characteristics can be enhanced in the low-pitched vocal cords and reproducing vocal cords of the sound generated by the large-area vibration of each of the first vibration generator 210 and the second vibration generator 230.

[0564] Therefore, in order to achieve individual vibration (or a single vibration device) of multiple vibrating structures 200A to 200D, the separation distance between the multiple vibrating structures 200A to 200D can be adjusted to 0.1mm or greater and less than 3cm. Furthermore, in order to achieve individual vibration (or a single vibration device) of multiple vibrating structures 200A to 200D and to increase the sound pressure level characteristics of the bass vocal cords, the separation distance between the multiple vibrating structures 200A to 200D can be adjusted to 0.1mm or greater and less than 5mm.

[0565] Each of the first vibration generator 210 and the second vibration generator 230 according to embodiments of the present disclosure may include a first vibration structure 200A to a fourth vibration structure 200D, the first vibration structure 200A to the fourth vibration structure 200D being electrically disconnected from each other and arranged at intervals from each other along a first direction X and a second direction Y. For example, the first to fourth vibration structures 200A to 200D may be arranged in a 2×2 configuration or laid flat.

[0566] According to embodiments of this disclosure, the first vibration structure 200A and the second vibration structure 200B may be spaced apart from each other along a first direction X. The third vibration structure 200C and the fourth vibration structure 200D may be spaced apart from each other in the first direction X, and may be spaced apart from each of the first vibration structure 200A and the second vibration structure 200B in a second direction Y. The first vibration structure 200A and the third vibration structure 200C may be spaced apart from each other in the second direction Y so as to face each other. The second vibration structure 200B and the fourth vibration structure 200D may be spaced apart from each other in the second direction Y so as to face each other.

[0567] Each of the first to fourth vibration structures 200A to 200D according to the embodiment of the disclosure can include a vibration portion 211a, a first electrode portion 211b, and a second electrode portion 211c.

[0568] The vibration portion 211a can include a ceramic-based material capable of achieving a relatively high vibration. For example, the vibration portion 211a can include a 1-3 composite structure having a piezoelectric property of a 1-3 vibration mode or a 2-2 composite structure having a piezoelectric property of a 2-2 vibration mode. For example, the vibration portion 211a can include a first portion 211a1 and a second portion 211a2, similar to the vibration portion 211a described above with reference to any one of FIGS. 1A to 1C. FIG. 3 The vibration portion 211a described above, or similar to the vibration portion 211a described above with reference to any one of FIGS. 1A to 1C, thus, identical reference numerals denote identical elements, and repetitive description thereof can be omitted. FIG. 10 to FIG. 14

[0569] According to an embodiment of the disclosure, the vibration portion 211a can be formed of a transparent, semi-transparent, or opaque piezoelectric material, and the vibration portion 211a can be transparent, semi-transparent, or opaque.

[0570] The first electrode portion 211b can be disposed at a first surface of the vibration portion 211a and can be electrically connected to the first surface of the vibration portion 211a. For example, the first electrode portion 211b can be substantially the same as the first electrode portion 211b described above with reference to any one of FIGS. 1A to 1C, thus, identical reference numerals denote identical elements, and repetitive description thereof can be omitted. FIG. 2 to FIG. 14

[0571] The second electrode portion 211c can be disposed at a second surface of the vibration portion 211a and can be electrically connected to the second surface of the vibration portion 211a. For example, the second electrode portion 211c can be substantially the same as the second electrode portion 211c described above with reference to any one of FIGS. 1A to 1C, thus, identical reference numerals denote identical elements, and repetitive description thereof can be omitted. FIG. 2 to FIG. 14

[0572] Each of the first vibration generator 210 and the second vibration generator 230 according to another embodiment of the disclosure can further include a first protection member 1213 and a second protection member 1215.

[0573] ​​​The first protection member 1213 can be disposed at the first surface of each of the first vibration generator 210 and the second vibration generator 230. For example, the first protection member 1213 can cover the first electrode portion 211b disposed at the first surface of each of the plurality of vibration structures 200A to 200D. Accordingly, the first protection member 1213 can be commonly connected to the first surface of each of the plurality of vibration structures 200A to 200D, or can commonly support the first surface of each of the plurality of vibration structures 200A to 200D. Accordingly, the first protection member 1213 can protect the first surface or the first electrode portion 211b of each of the plurality of vibration structures 200A to 200D.

[0574] The first protection member 1213 according to the embodiment of the disclosure can be disposed at the first surface of each of the plurality of vibration structures 200A to 200D through the first adhesive layer 1212. For example, the first protection member 1213 can be disposed at the first surface of each of the plurality of vibration structures 200A to 200D through a film lamination process using the first adhesive layer 1212. For example, the first protection member 1213 can be directly disposed at the first surface of each of the plurality of vibration structures 200A to 200D through a film lamination process using the first adhesive layer 1212. Accordingly, the plurality of vibration structures 200A to 200D can be integrated (or disposed) or tiled with the first protection member 1213 to have specific intervals D1 and D2. Accordingly, the plurality of vibration structures 200A to 200D can be implemented as a single film or a single structure.

[0575] The second protection member 1215 can be disposed at the second surface of each of the first vibration generator 210 and the second vibration generator 230. For example, the second protection member 1215 can cover the second electrode portion 211c disposed at the second surface of each of the plurality of vibration structures 200A to 200D. Accordingly, the second protection member 1215 can be commonly connected to the second surface of each of the plurality of vibration structures 200A to 200D, or can commonly support the second surface of each of the plurality of vibration structures 200A to 200D. Accordingly, the second protection member 1215 can protect the second surface or the second electrode portion 211c of each of the plurality of vibration structures 200A to 200D.

[0576] The second protective member 1215 according to the embodiment of the disclosure can be disposed at the second surface of each of the plurality of vibration structures 200A to 200D by the second adhesive layer 1214. For example, the second protective member 1215 can be disposed at the second surface of each of the plurality of vibration structures 200A to 200D by a film lamination process using the second adhesive layer 1214. For example, the second protective member 1215 can be disposed at the second surface of each of the plurality of vibration structures 200A to 200D by a film lamination process using the second adhesive layer 1214 directly. For example, the first adhesive layer 1212 and the second adhesive layer 1214 are coupled to each other to surround the plurality of vibration structures 200A to 200D. Accordingly, the plurality of vibration structures 200A to 200D can be integrated (or disposed) or tiled with the second protective member 1215 to have specific intervals D1 and D2. Accordingly, the plurality of vibration structures 200A to 200D can be implemented as a single film or a single structure.

[0577] Each of the first protective member 1213 and the second protective member 1215 according to the embodiment of the disclosure can be formed of a plastic material, a fiber material, or a wood material, but the embodiment of the disclosure is not limited thereto. One or more of the first protective member 1213 and the second protective member 1215 can be attached or coupled to the display panel 100 by a connection member (or a second connection member).

[0578] The first adhesive layer 1212 can be disposed between the first surfaces of each of the plurality of vibration structures 200A to 200D and between the plurality of vibration structures 200A to 200D. For example, the first adhesive layer 1212 can be formed on a rear surface (or an inner surface) of a first surface of the first protective member 1213 facing each of the first vibration generator 210 and the second vibration generator 230. For example, the first adhesive layer 1212 can be disposed at the first surface of each of the plurality of vibration structures 200A to 200D and filled between the plurality of vibration structures 200A to 200D.

[0579] The second adhesive layer 1214 can be disposed between the second surfaces of each of the plurality of vibration structures 200A to 200D and between the plurality of vibration structures 200A to 200D. For example, the second adhesive layer 1214 can be formed on a front surface (or an outer surface) of a second surface of the second protective member 1215 facing each of the first vibration generator 210 and the second vibration generator 230. For example, the second adhesive layer 1214 can be disposed at the second surface of each of the plurality of vibration structures 200A to 200D and filled between the plurality of vibration structures 200A to 200D.

[0580] The first adhesive layer 1212 and the second adhesive layer 1214 can be connected to each other between the plurality of vibration structures 200A to 200D. Accordingly, each of the plurality of vibration structures 200A to 200D can 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 can completely surround all of the plurality of vibration structures 200A to 200D. For example, the first adhesive layer 1212 and the second adhesive layer 1214 can be referred to as a cover member, but embodiments of the present disclosure are not limited thereto. When the first adhesive layer 1212 and the second adhesive layer 1214 are both cover members, the first protective member 1213 can be disposed at a first surface of the cover member, and the second protective member 1215 can be disposed at a second surface of the cover member.

[0581] Each of the first adhesive layer 1212 and the second adhesive layer 1214 according to an embodiment of the present disclosure can include an electrically insulating material having adhesiveness, and can include a material capable of compression and decompression. For example, each of the first adhesive layer 1212 and the second adhesive layer 1214 can include an epoxy resin, an acrylic resin, a silicone resin, or a polyurethane resin, but embodiments of the present disclosure are not limited thereto. For example, each of the first adhesive layer 1212 and the second adhesive layer 1214 can be configured to be transparent, translucent, or opaque.

[0582] Each of the first vibration generator 210 and the second vibration generator 230 according to another embodiment of the present disclosure can further include a first power supply line PL1 disposed at the first protective member 1213, a second power supply line PL2 disposed at the second protective member 1215, and a pad portion 1217 electrically connected to the first power supply line PL1 and the second power supply line PL2.

[0583] The first power supply line PL1 can be disposed at a first surface of the first protective member 1213 facing a first surface of each of the first vibration generator 210 and the second vibration generator 230. For example, in the first protective member 1213, the first surface can be a front surface or an opposite surface of an electrode. The first power supply line PL1 can be electrically connected to the first electrode portion 211b of each of the plurality of vibration structures 200A to 200D. For example, the first power supply line PL1 can be directly electrically connected to the first electrode portion 211b of each of the plurality of vibration structures 200A to 200D. As an embodiment of the present disclosure, the first power supply line PL1 can be electrically connected to the first electrode portion 211b of each of the plurality of vibration structures 200A to 200D through an anisotropic conductive film. As another embodiment of the present disclosure, the first power supply line PL1 can be electrically connected to the first electrode portion 211b of each of the plurality of vibration structures 200A to 200D through a conductive material (or particles) included in the first adhesive layer 1212.

[0584] The first power line PL1 according to the embodiment of the present disclosure can include a first (1-1) power line PL11 and a first (1-2) power line PL12 disposed along the second direction Y. For example, the first (1-1) power line PL11 can be electrically connected to the first electrode portion 211b of each of the first vibration structure 200A and the third vibration structure 200C (or a first group or a first array group) among the plurality of vibration structures 200A to 200D. For example, the first vibration structure 200A and the third vibration structure 200C can be arranged at a first column parallel to the second direction Y among the plurality of vibration structures 200A to 200D. The first (1-2) power line PL12 can be electrically connected to the first electrode portion 211b of each of the second vibration structure 200B and the fourth vibration structure 200D (or a second group or a second array group) arranged at a second column parallel to the second direction Y among the plurality of vibration structures 200A to 200D. For example, the second vibration structure 200B and the fourth vibration structure 200D can be arranged at the second column parallel to the second direction Y among the plurality of vibration structures 200A to 200D.

[0585] The second power line PL2 can be disposed at a first surface of the second protective member 1215 facing a second surface of each of the first vibration generator 210 and the second vibration generator 230. For example, in the second protective member 1215, the first surface can be a bottom surface or an opposite surface of the electrode. The second power line PL2 can be electrically connected to the second electrode portion 211c of each of the plurality of vibration structures 200A to 200D. For example, the second power line PL2 can be directly electrically connected to the second electrode portion 211c of each of the plurality of vibration structures 200A to 200D. As an embodiment of the present disclosure, the second power line PL2 can be electrically connected to the second electrode portion 211c of each of the plurality of vibration structures 200A to 200D through an anisotropic conductive film. As another embodiment of the present disclosure, the second power line PL2 can be electrically connected to the second electrode portion 211c of each of the plurality of vibration structures 200A to 200D through a conductive material (or particles) included in the second adhesive layer 1214.

[0586] The second power line PL2 according to the embodiment of the disclosure can include a first (2-1) power line PL21 and a second (2-2) power line PL22 disposed along the second direction Y. For example, the first (2-1) power line PL21 can be electrically connected to the second electrode portion 211c of each of the first vibration structure 200A and the third vibration structure 200C (or a first group or a first array group) among the plurality of vibration structures 200A to 200D. For example, the first vibration structure 200A and the third vibration structure 200C can be arranged at a first column parallel to the second direction Y among the plurality of vibration structures 200A to 200D. The second (2-2) power line PL22 can be electrically connected to the second electrode portion 211c of each of the second vibration structure 200B and the fourth vibration structure 200D (or a second group or a second array group) arranged at a second column parallel to the second direction Y among the plurality of vibration structures 200A to 200D. For example, the second vibration structure 200B and the fourth vibration structure 200D can be arranged at the second column parallel to the second direction Y among the plurality of vibration structures 200A to 200D.

[0587] The pad portion 1217 can be provided at each of the first vibration generator 210 and the second vibration generator 230 to be electrically connected to one 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 the embodiment of the disclosure can 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.

[0588] The first pad electrode can be commonly connected to a portion (or one end) of each of the first (1-1) power line PL11 and the second (1-2) power line PL12 of the first power line PL1. For example, a portion (or one end) of each of the first (1-1) power line PL11 and the second (1-2) power line PL12 can be branched from the first pad electrode.

[0589] The second pad electrode can be commonly connected to a portion (or one end) of each of the first (2-1) power line PL21 and the second (2-2) power line PL22 of the second power line PL2. For example, a portion (or one end) of each of the first (2-1) power line PL21 and the second (2-2) power line PL22 can be branched from the second pad electrode.

[0590] According to the embodiment of the disclosure, each of the first power line PL1, the second power line PL2, and the pad portion 1217 can be configured as a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material, thereby being transparent, semi-transparent, or opaque.

[0591] Each of the first vibration generator 210 and the second vibration generator 230 according to another embodiment of the disclosure can further include a flexible cable 1219.

[0592] The flexible cable 1219 can be electrically connected to the pad portion 1217 provided at each of the first vibration generator 210 and the second vibration generator 230, and can supply one or more vibration driving signals (or sound signals) provided from a vibration driving 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 disclosure can include a first terminal electrically connected with a first pad electrode of the pad portion 1217 and a second terminal electrically connected with a second pad electrode of the pad portion 1217. For example, the flexible cable 1219 can be a flexible printed circuit cable or a flexible flat cable, but embodiments of the disclosure are not limited thereto.

[0593] Accordingly, the vibration device 200 according to another embodiment of the disclosure can include a plurality of vibration structures 200A to 200D which are implemented as a single vibrator without being independently driven, and thus can be driven as a large-area vibrator based on the single vibration of the plurality of vibration structures 200A to 200D. For example, the plurality of vibration structures 200A to 200D can be a single vibrator arranged (or tiled) at specific intervals D1 and D2. Accordingly, the vibration device 200 can cause large-area vibration of a display panel or a vibration object (or a vibration member), or can cause itself to vibrate in a large area, thereby increasing or enhancing the sound characteristics and the sound pressure level characteristics in the bass sound band and the reproduced sound band of the sound output from the display panel or the vibration object (or the vibration member).

[0594] Referring to FIG. 16A to FIG. 16DThe first power line PL1 of the first vibration generator 210 and the second vibration generator 230 can be connected to the first electrode portion 211b. The second power line PL2 of the first vibration generator 210 and the second vibration generator 230 can be connected to the second electrode portion 211c. For example, the first electrode portion 211b of the first vibration generator 210 disposed in the upper layer among the plurality of vibration generators and the first electrode portion 211b of the second vibration generator 230 disposed in the lower layer among the plurality of vibration generators can be connected to the first power line PL1. The second electrode portion 211c of the first vibration generator 210 disposed in the upper layer among the plurality of vibration generators and the second electrode portion 211c of the second vibration generator 230 disposed in the lower layer among the plurality of vibration generators can be connected to the second power line PL2. For example, the first electrode portion 211b of the vibration generator 210 disposed closer to the front surface of the display panel 100 (or the vibration member) can be connected to the first power line PL1. The second electrode portion 211c of the other vibration generator 230 disposed less closer to the front surface of the display panel 100 (or the vibration member) can be connected to the second power line PL2. For example, the first electrode portion 211b disposed at the first vibration generator 210 among the plurality of vibration generators and the first electrode portion 211b disposed at the second vibration generator 230 among the plurality of vibration generators can be connected to the first power line PL1. The second electrode portion 211c disposed at the first vibration generator 210 among the plurality of vibration generators and the second electrode portion 211c disposed at the second vibration generator 230 among the plurality of vibration generators can be connected to the second power line PL2.

[0595] Referring to FIG. 16A The first power line PL1 of the first vibration generator 210 can overlap the first power line PL1 of the second vibration generator 230. The second power line PL2 of the first vibration generator 210 can overlap the second power line PL2 of the second vibration generator 230. The first power line PL1 of the first vibration generator 210 can overlap the second power line PL2 of the second vibration generator 230. The first power line PL1 of the second vibration generator 230 can overlap the second power line PL2 of the first vibration generator 210.

[0596] Referring to FIG. 16B to FIG. 16DFor example, the first power line PL1 connected to the first electrode portion 211b of the first vibration generator 210 disposed at the upper layer among the plurality of vibration generators can not overlap the second power line PL2 connected to the second electrode portion 211c of the first vibration generator 210 disposed at the upper layer among the plurality of vibration generators. For example, the first power line PL1 connected to the first electrode portion 211b at the first vibration generator 210 disposed among the plurality of vibration generators can not overlap the second power line PL2 connected to the second electrode portion 211c at the first vibration generator 210 disposed among the plurality of vibration generators. The first power line PL1 connected to the first electrode portion 211b of the second vibration generator 230 disposed at the lower layer among the plurality of vibration generators can not overlap the second power line PL2 connected to the second electrode portion 211c of the second vibration generator 230 disposed at the lower layer among the plurality of vibration generators. For example, the first power line PL1 connected to the first electrode portion 211b at the second vibration generator 230 disposed among the plurality of vibration generators can not overlap the second power line PL2 connected to the second electrode portion 211c at the second vibration generator 230 disposed among the plurality of vibration generators. For example, the first electrode portion 211b of the vibration generator 210 disposed closer to the front surface of the display panel 100 (or the vibration member) can be connected to the first power line PL1. The second electrode portion 211c of another vibration generator 230 disposed less close to the front surface of the display panel 100 (or the vibration member) can be connected to the second power line PL2. For example, the second power line PL2 connected to the second electrode portion 211c can be spaced apart from the first power line PL1 connected to the first electrode portion 211b in a plane parallel to the front surface and the rear surface of the display panel 100 (or the vibration member). For example, the second power line PL2 can be spaced apart from the first power line PL1 in a plane parallel to the front surface and the rear surface of the display panel 100 (or the vibration member).

[0597] Referring to FIG. 16B The first power line PL1 of the first vibration generator 210 can overlap the second power line PL2 of the second vibration generator 230. The second power line PL2 of the first vibration generator 210 can overlap the first power line PL1 of the second vibration generator 230. The first power line PL1 of the first vibration generator 210 can not overlap the first power line PL1 of the second vibration generator 230. The second power line PL2 of the first vibration generator 210 can overlap the second power line PL2 of the second vibration generator 230. Accordingly, disconnection caused by overlapping of power lines can be addressed, and a problem in which the thickness of the vibration device is thickened due to an increase in thickness caused by overlapping of power lines can be addressed.

[0598] Referring to FIG. 16C, the first power line PL1 of the first vibration generator 210 can overlap the first power line PL1 of the second vibration generator 230. The second power line PL2 of the first vibration generator 210 can overlap the second power line PL2 of the second vibration generator 230. With FIG. 16A In comparison, the first power line PL1 of the first vibration generator 210 and the first power line PL1 of the second vibration generator 230 can be moved leftward and rightward with respect to the first direction X and can be disposed. Accordingly, all of the first power lines PL1 and the second power lines PL2 of each of the first vibration generator 210 and the second vibration generator 230 can not overlap. Accordingly, disconnection caused by overlapping of the power lines can be addressed, and a problem in which the thickness of the vibration device is thickened due to an increase in thickness caused by overlapping of the power lines can be addressed.

[0599] Referring to FIG. 16D , the first power line PL1 of the first vibration generator 210 can overlap the first power line PL1 of the second vibration generator 230. The second power line PL2 of the first vibration generator 210 can overlap the second power line PL2 of the second vibration generator 230. With FIG. 16A In comparison, the first power line PL1 of the first vibration generator 210 and the first power line PL1 of the second vibration generator 230 can be moved leftward and rightward with respect to the first direction X and can be disposed. Accordingly, all of the first power lines PL1 and the second power lines PL2 of each of the first vibration generator 210 and the second vibration generator 230 can not overlap. Accordingly, disconnection caused by overlapping of the power lines can be addressed, and a problem in which the thickness of the vibration device is thickened due to an increase in thickness caused by overlapping of the power lines can be addressed.

[0600] Referring to FIG. 16EIn the first vibration generator 210, the first electrode portion 211b of the first vibration structure 200A and the first electrode portion 211b of the second vibration structure 200B can be disposed on different surfaces with respect to the vibration portion 211a. For example, in the first vibration generator 210, the first electrode portion 211b of the first vibration structure 200A and the first electrode portion 211b of the second vibration structure 200B can be disposed on different layers with respect to the vibration portion 211a. For example, in the first vibration generator 210, the first electrode portion 211b of the first vibration structure 200A and the first electrode portion 211b of the second vibration structure 200B can be arranged in a zigzag shape. For example, the first electrode portion 211b of the first vibration structure 200A of the first vibration generator 210 can be disposed at a surface facing the first protection member 1213. For example, the first electrode portion 211b of the second vibration structure 200B can be disposed at a surface facing the second protection member 1215. For example, the first electrode portion 211b of the first vibration structure 200A of the first vibration generator 210 can be connected to the first power supply line PL1, and the first electrode portion 211b of the second vibration structure 200B of the first vibration generator 210 can be connected to the second power supply line PL2.

[0601] Referring to FIG. 16E In the second vibration generator 230, the first electrode portion 211b of the first vibration structure 200A and the first electrode portion 211b of the second vibration structure 200B can be disposed on different surfaces with respect to the vibration portion 211a. For example, in the second vibration generator 230, the first electrode portion 211b of the first vibration structure 200A and the first electrode portion 211b of the second vibration structure 200B can be disposed on different layers with respect to the vibration portion 211a. For example, in the second vibration generator 230, the first electrode portion 211b of the first vibration structure 200A and the first electrode portion 211b of the second vibration structure 200B can be arranged in a zigzag shape. For example, the first electrode portion 211b of the first vibration structure 200A of the second vibration generator 230 can be disposed at a surface facing the first protection member 1213. For example, the first electrode portion 211b of the second vibration structure 200B of the second vibration generator 230 can be disposed at a surface facing the second protection member 1215. For example, the first electrode portion 211b of the first vibration structure 200A of the second vibration generator 230 can be connected to the first power supply line PL1, and the first electrode portion 211b of the second vibration structure 200B of the second vibration generator 230 can be connected to the second power supply line PL2.

[0602] According to another embodiment of the disclosure, the first electrode portion 211b of the first vibration structure 200A of the first vibration generator 210 can be connected to the second power line PL2, and the first electrode portion 211b of the second vibration structure 200B of the first vibration generator 210 can be connected to the first power line PL1. The first electrode portion 211b of the first vibration structure 200A of the second vibration generator 230 can be connected to the second power line PL2, and the first electrode portion 211b of the second vibration structure 200B of the second vibration generator 230 can be connected to the first power line PL1.

[0603] According to another embodiment of the disclosure, FIG. 16B to FIG. 16D the description of the first power line PL1 and / or the second power line PL2 in FIG. 16E may equally apply to .

[0604] FIG. 16A to FIG. 16E the description of the first power line PL1 and / or the second power line PL2 in FIG. 21 may equally apply to FIG. 23 , FIG. 25 , FIG. 27 and FIG. 29 .

[0605] FIG. 17 a cross-sectional view taken along the line I-I’ shown in FIG. 1 is shown. FIG. 17 an embodiment of the disclosure is shown, in which a plate is further configured in the device shown in FIG. 2 to FIG. 16E .

[0606] Referring to FIG. 17 , a device according to another embodiment of the disclosure can include a display panel 100 for displaying an image and a vibration device 200 for vibrating the display panel 100 and on a rear surface (or backside surface) of the display panel 100. The device according to another embodiment of the disclosure can further include a plate 170 disposed between the display panel 100 and the vibration device 200.

[0607] Each of the display panel 100 and the vibration device 200 can be substantially the same as each of the display panel 100 and the vibration device 200 described above with reference to FIG. 2 to FIG. 16E , and thus, a repeated description thereof can be omitted or given briefly.

[0608] The plate 170 can have the same shape and size as the rear surface of the display panel 100, or can have the same shape and size as the vibration device 200. As another embodiment of the disclosure, the plate 170 can have a different size from the display panel 100. For example, the plate 170 can be smaller than the size of the display panel 100. As another embodiment of the disclosure, the plate 170 can have a different size from the vibration device 200. For example, the plate 170 can be larger or smaller than the size of the vibration device 200. The vibration device 200 can be the same size as or smaller than the size of the display panel 100.

[0609] The plate 170 according to an embodiment of the disclosure can include a metal material. For example, the plate 170 can include one or more materials of stainless steel, aluminum (Al), magnesium (Mg), a magnesium alloy, a magnesium-lithium (Mg-Li) alloy, and an aluminum alloy, but embodiments of the disclosure are not limited thereto.

[0610] The plate 170 according to an embodiment of the disclosure can include a plurality of open portions. The plurality of open portions can be configured to have a predetermined size and a predetermined interval (or distance). For example, the plurality of open portions can be disposed along the first direction X and the second direction Y to have a predetermined size and a predetermined interval. Due to the plurality of open portions, sound waves (or sound pressure) based on the vibration of the vibration device 200 can not be dispersed by the plate 170 and can be concentrated on the display panel 100. Accordingly, it is possible to minimize the loss of vibration caused by the plate 170, thereby increasing the sound pressure characteristic of the sound generated based on the vibration of the display panel 100. For example, the plate 170 including a plurality of openings can have a mesh shape. For example, the plate 170 including a plurality of openings can be a mesh plate.

[0611] According to an embodiment of the disclosure, the plate 170 can be connected or coupled to the rear surface of the display panel 100. For example, when the display panel 100 is a light emitting display panel, the plate 170 can be disposed at the rear surface of the encapsulation portion of the light emitting display panel. The plate 170 can be configured as a structure disposed at the rear surface of the encapsulation portion or bonded to the rear surface of the encapsulation portion. The plate 170 can dissipate heat occurring in the display panel 100. For example, the plate 170 can be referred to as a heat dissipation member, a heat dissipation plate, or a heat sink, but embodiments of the disclosure are not limited thereto. For example, when the plate 170 is configured as a structure disposed at the rear surface of the encapsulation portion or bonded to the rear surface of the encapsulation portion, the first support member 310 can be omitted.

[0612] According to embodiments of this disclosure, plate 170 can enhance the mass of vibrating device 200, which is disposed on or suspended from the rear surface of display panel 100. Therefore, plate 170 can reduce the resonant frequency of vibrating device 200 based on the increased mass of vibrating device 200. Thus, plate 170 can increase the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords generated by the vibration of vibrating 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 and lowest sound pressure levels. For example, plate 170 can be referred to as a counterweight member, a mass member, a sound flattening member, etc., but embodiments of this disclosure are not limited thereto.

[0613] According to embodiments of this disclosure, based on the stiffness of the plate 170, the displacement (or bending force or flexural force) or amplitude displacement (or vibration width) of the display panel 100 on which the plate 170 is disposed can decrease as the thickness of the plate 170 increases. Therefore, the sound pressure level characteristics and sound characteristics of the low-pitched vocal cords of the sound generated based on the displacement (or vibration) of the display panel 100 may be reduced.

[0614] According to embodiments of this disclosure, in addition to the thickness of the plate 170, the displacement of the display panel 100 can also be affected by the contact area between the vibration device 200 and the plate 170. For example, as FIG. 18 As shown, when the same force is applied based on the thickness of plate 170, the displacement of display panel 100 can increase as the contact area between vibration device 200 and plate 170 or the attachment area of ​​vibration device 200 gradually decreases. For example, when the thickness of plate 170 is 0.25 mm, the displacement based on vibration device 200 having a first size ( FIG. 18 The amplitude shift (or amount of shift) of the display panel 100 (thick solid line in the image) can be greater than the shift of the vibration device 200 based on a second size that is greater than the first size. FIG. 18The vibration device 200 according to the embodiment of the disclosure can include a plurality of vibration generators 210 and 230 having a first size and overlapping each other, thereby minimizing the reduction in 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 disclosure can include a plurality of vibration generators 210 and 230 having a first size and overlapping each other, and thus the amount of displacement of the display panel 100 can be increased or maximized, thereby increasing or enhancing the sound pressure level characteristics of the sound generated based on the displacement of the display panel 100 and the sound characteristics of the low-pitched sound band. Accordingly, in the device according to another embodiment of the 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 can have a thickness that enables the heat of the display panel 100 to be smoothly dissipated. For example, the plate 170 can have a thickness of 0.1 mm to 0.75 mm, but embodiments of the disclosure are not limited thereto.

[0615] The plate 170 according to the embodiment of the disclosure can be coupled or connected to the rear surface of the display panel 100 through a plate connecting member (or a fourth connecting member) 190.

[0616] The plate connecting member 190 according to the embodiment of the disclosure can include a material including an adhesive layer having good adhesion or attachment force with respect to the rear surfaces of the display panel 100 and the vibration device 200, respectively. For example, the plate connecting member 190 can include a foam pad, a double-sided tape, a double-sided foam pad, a double-sided foam tape, or an adhesive, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the plate connecting member 190 can include an epoxy-based, an acrylic-based, a silicone-based, or a polyurethane-based, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the plate connecting member 190 can be the same as the adhesive layer of the connecting member 150, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the plate connecting member 190 can 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 transmitted to the display panel 100 or the vibration object. As another embodiment of the disclosure, the adhesive layer of the plate connecting member 190 can be different from the adhesive layer of the connecting member 150.

[0617] The vibration device 200 can be connected or coupled to the rear surface of the plate 170 through the connecting member 150 described above, and thus can be supported by or hung at the rear surface of the plate 170.

[0618] The plate 170 according to the embodiment of the disclosure can be connected or coupled to the front surface of the vibration device 200 through the connection member 150 described above. For example, the plate 170 can be disposed at the uppermost vibration generator among the plurality of vibration generators 210 and 230. For example, the plate 170 can 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 can 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 the embodiment of the disclosure can be integrated into the vibration device 200, or can be provided as an element of the vibration device 200. For example, the plate 170 and the vibration device 200 can be configured as one structure or one assembly (or module) which is provided as one body. Accordingly, when the plate 170 is disposed between the rear surface of the display panel 100 and the vibration device 200, based on assembly integration (or modularization) between the plate 170 and the vibration device 200, an assembly process between the display panel 100 and the vibration device 200 can be easily performed.

[0619] In a case in which the plate 170 and the vibration device 200 according to the embodiment of the disclosure are configured as one structure or are provided as one assembly (or module) in one body, the vibration object can be configured as a vibration plate. The plate 170 and the vibration device 200 can be provided at a non-display panel. The plate 170 and the vibration device 200 can be connected or coupled to each other by the connection member 150. For example, the vibration object can include a display panel including pixels configured to display an image, or can include a non-display panel. For example, the vibration object can include a display panel including pixels configured to display an image, or can be one or more of wood, plastic, glass, cloth, paper, leather, a vehicle interior material, a vehicle glazing, a building interior ceiling, a building glazing, a building interior material, an aircraft interior material, an aircraft glazing, etc., but embodiments of the disclosure are not limited thereto. For example, the vibration object can include one or more of a display panel including pixels configured to display an image, a screen panel onto which an image is projected from a display device, an illumination panel, a signage panel, a vehicle interior material, a vehicle glazing, a vehicle exterior material, a building ceiling material, a building interior material, a building glazing, an aircraft interior material, an aircraft glazing, and a mirror, but embodiments of the disclosure are not limited thereto. For example, the non-display panel can be a light emitting diode illumination panel (or device), an organic light emitting illumination panel (or device), an inorganic light emitting illumination panel (or device), etc., but embodiments of the disclosure are not limited thereto. For example, the vibration object can include a display panel including pixels configured to display an image, or can be a light emitting diode illumination panel (or device), an organic light emitting illumination panel (or device), an inorganic light emitting illumination panel (or device), but embodiments of the disclosure are not limited thereto.

[0620] According to embodiments of the disclosure, the plate 170 and the vibration device 200 can be provided at a non-display panel. The plate 170 can be coupled or connected to a module (or structure) of the vibration device 200 by the connection member 150. Accordingly, the plate 170 and the module (or structure) of the vibration device 200 can vibrate the non-display panel to implement sound and / or haptic feedback.

[0621] According to another embodiment of the present disclosure, in a case where the plate 170 and the vibration device 200 are configured as one structure or are disposed as one component (or module) in one body, the plate 170 can be implemented as a vibration object (or a vibrating plate). Accordingly, sound and / or haptic feedback can be implemented based on vibration of the plate 170. For example, in a structure (or structure body) of the plate 170 and the vibration device 200, the plate 170 can include one or more materials of stainless steel, aluminum (Al), magnesium (Mg), a Mg alloy, a Mg-Li alloy, and an Al alloy, but embodiments of the present disclosure are not limited thereto. For example, in a module (or structure) of the plate 170 and the vibration device 200, the plate 170 can include a single non-metal material or a composite non-metal material of one or more of wood, plastic, glass, cloth, paper, and leather.

[0622] Accordingly, in the device according to another embodiment of the present disclosure, as described above with reference to FIG. 2 to FIG. 16E the stacked structure of the vibration generators 210 and 230, a sound pressure level characteristic of sound generated based on displacement of the display panel 100 and a sound characteristic of a low-pitched sound band can be increased or enhanced. Further, in the device according to another embodiment of the present disclosure, a resonance frequency of the vibration device 200 can be lowered by the plate 170, and heat of the display panel 100 can be dissipated by the plate 170.

[0623] FIG. 19 A device according to another embodiment of the present disclosure is illustrated, and is another cross-sectional view taken along line I-I' illustrated in FIG. 1B. FIG. 1

[0624] Referring to FIG. 19 , a device according to another embodiment of the present disclosure can include a display panel 100 and a vibration device 200. The device according to another embodiment of the present disclosure can further include a spacer member 700 between the display panel 100 and the vibration device 200.

[0625] The spacer member 700 can be configured to reduce a tilting phenomenon of the vibration device 200. For example, when the spacer member 700 is disposed, the tilting phenomenon can be reduced in a frequency of 3 kHz to 4 kHz. Sound of the frequency of 3 kHz to 4 kHz can affect pronunciation of sound, and when the tilting phenomenon occurs in the frequency, sound output characteristics can be lowered due to unclear sound. The tilting phenomenon can be a phenomenon in which a sound pressure level bounces in a specific frequency band. The spacer member 700 can be referred to as a resonance control element, a resonance controller, and a resonance spacer, but embodiments of the present disclosure are not limited thereto.

[0626] ​The vibration device 200 can be fixed to the support member 300 through the spacer member 700. For example, the center of the vibration device 200 can be fixed to the support member 300 through the spacer member 700. Accordingly, tilting phenomena in a frequency of 3 kHz to 4 kHz can be more reduced.

[0627] For example, the second support member 330 can include a first metal layer, a core layer, and a second metal layer. The first metal layer and the second metal layer can include a material having high thermal conductivity or high heat conductivity. For example, the first metal layer and the second metal layer can include aluminum (Al), but embodiments of the present disclosure are not limited thereto. The core layer can be disposed between the first metal layer and the second metal layer. The core layer can include a plastic material. For example, the core layer can include polyethylene and polypropylene, etc., but embodiments of the present disclosure are not limited thereto. As another example, the core layer can include a mixed material of magnesium hydroxide (Mg(OH)2), ethylene vinyl acetate, and polyethylene, etc. An adhesive layer is disposed between the first metal layer and the core layer and between the second metal layer and the core layer, respectively. The adhesive layer can include an adhesive, a hot melt adhesive, or a double-sided tape, but embodiments of the present disclosure are not limited thereto. When the second support member 330 includes the first metal layer, the core layer, and the second metal layer, the first support member 310 can be omitted, and thus the thickness of the device or the display device can be further reduced.

[0628] The thickness of the spacer member 700 can be configured such that the spacer member 700 can contact the thickness of the support member 300.

[0629] The spacer member 700 can be configured to have a size smaller than or equal to the vibration device 200. For example, the spacer member 700 can overlap the vibration device 200. Accordingly, the spacer member 700 can be fixed between the vibration device 200 and the support member 300, and thus tilting phenomena caused by vibration of the vibration device 200 can be reduced. For example, the spacer member 700 can overlap the vibration device 200. For example, the spacer member 700 can be configured to correspond to the center of the vibration device 200. For example, the spacer member 700 can have a size of 20 mm x 20 mm, but embodiments of the present disclosure are not limited thereto. For example, the spacer member 700 can have a quadrangular shape (or a square shape) or a rectangular shape, but embodiments of the present disclosure are not limited thereto.

[0630] The spacer member 700 can include a material for absorbing or adjusting vibration. For example, the spacer member 700 can include one or more materials of a silicon-based polymer, a polyolefin, a paraffin, and an acrylic polymer, but embodiments of the present disclosure are not limited thereto.

[0631] For example, an adhesive can be further disposed between the cushion member 700 and the vibration device 200. For example, an adhesive can be further disposed between the cushion member 700 and the support member 300. The cushion member 700 can be disposed between the vibration device 200 and the support member 300 by the adhesive. For example, the adhesive can include a single-sided tape, a single-sided foam tape, a double-sided tape, a double-sided foam pad, a double-sided foam tape, or the like, but embodiments of the present disclosure are not limited thereto. As another embodiment of the present disclosure, the cushion member 700 can include an adhesive. For example, when the cushion member 700 includes an adhesive, the adhesive can not be disposed. When the cushion member 700 includes a silicon-based material, the adhesive can not be disposed therein.

[0632] For example, the cushion member 700 can be formed of the same material as the vibration device 200. When the cushion member 700 is composed of the same material as the vibration device 200, the level of a signal applied to the cushion member 700 can be adjusted, and thus the resonance of the vibration device 200 can be easily adjusted.

[0633] For example, a plurality of second portions can be disposed at the periphery of the vibration device 200. The cushion member 700 disposed at a position corresponding to the vibration device 200 can be disposed at a position corresponding to the plurality of first portions. For example, the cushion member 700 can be disposed to correspond to the plurality of first portions rather than the plurality of second portions. For example, an end portion of the cushion member 700 can be disposed to correspond to the plurality of first portions.

[0634] FIG. 20 A vibration device according to another embodiment of the present disclosure is illustrated. FIG. 21 is a cross-sectional view taken along FIG. 20 line VI-VI' shown in FIG. 6. FIG. 20 and FIG. 21 An embodiment of the present disclosure implemented by adding a cushion member to FIG. 2 to FIG. 4 is illustrated. Accordingly, hereinafter, the description of elements other than the cushion member will be omitted or will be briefly given below. Also, the description of the cushion member can be the same as or similar to the description given above with reference to FIG. 19 , and thus is omitted or will be briefly given below.

[0635] Referring to FIG. 20 and FIG. 21According to another embodiment of the present disclosure, the vibration device 200 can include a plurality of vibration generators (e.g., a first vibration generator and a second vibration generator) 210 and 230 and an adhesive member 250. The first vibration generator 210 can be connected to or disposed at a rear surface of the display panel 100 through a connection member 150 (or a second connection member). The second vibration generator 230 can be connected to or disposed at the first vibration generator 210 through the adhesive member 250 (or a first connection member).

[0636] Each of the first vibration generator 210 and the second vibration generator 230 can include a vibration structure 211, a first protection member 213, and a second protection member 215. For example, the vibration structure 211 can include a vibration portion 211a, 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 or different from the first surface. For example, the vibration portion 211a can include a piezoelectric material.

[0637] In the first vibration generator 210, a first adhesive layer 212 can be disposed between the vibration structure 211 and the first protection member 213. For example, the first adhesive layer 212 can be disposed between the first electrode portion 211b of the vibration structure 211 and the first protection member 213. In the first vibration generator 210, a second adhesive layer 214 can be disposed between the vibration structure 211 and the second protection member 215. For example, the second adhesive layer 214 can be disposed between the second electrode portion 211c of the vibration structure 211 and the second protection member 215.

[0638] In the second vibration generator 230, a first adhesive layer 212 can be disposed between the vibration structure 211 and the first protection member 213. For example, the first adhesive layer 212 can be disposed between the first electrode portion 211b of the vibration structure 211 and the first protection member 213. In the second vibration generator 230, a second adhesive layer 214 can be disposed between the vibration structure 211 and the second protection member 215. For example, the second adhesive layer 214 can be disposed between the second electrode portion 211c of the vibration structure 211 and the second protection member 215.

[0639] The cushion member 700 can be further disposed under the plurality of vibration generators (e.g., the first vibration generator and the second vibration generator) 210 and 230. For example, the cushion member 700 can be further disposed under the second vibration generator 230 of the plurality of vibration generators 210 and 230. For example, the cushion member 700 can be disposed between the plurality of vibration generators 210 and 230 and the support member 300. For example, the cushion member 700 can overlap the plurality of vibration generators 210 and 230. For example, the cushion member 700 can overlap the vibration structure 211.

[0640] The size of the cushion member 700 can be configured to be less than or equal to the vibration device 200. For example, the size of the cushion member 700 can be configured to be less than or equal to each of the plurality of vibration generators 210 and 230.

[0641] The device according to another embodiment of the disclosure can further include a plate. For example, as described above with reference to FIG. 17 the device according to another embodiment of the disclosure can further include a plate between the display panel and the vibration device. For example, the device according to another embodiment of the disclosure can further include a plate between the display panel and the first vibration generator 210.

[0642] In the device according to another embodiment of the disclosure, the cushion member can be further disposed in the vibration device, thereby providing a device having enhanced sound pressure level characteristics.

[0643] FIG. 22 A vibration device according to another embodiment of the disclosure is illustrated. FIG. 23 is a cross-sectional view taken along FIG. 22 line VII-VII' shown in FIG. 7. FIG. 22 and FIG. 23 Embodiments of the disclosure implemented by adding a cushion member to the vibration device described above with reference to FIG. 10 to FIG. 12C Thus, hereinafter, the description of elements other than the cushion member is omitted or will be briefly given below. Also, the description of the cushion member can be the same as or similar to that given above with reference to FIG. 19 and thus is omitted or will be briefly given below.

[0644] Referring to FIG. 22 to FIG. 23 In the vibration device 200 according to another embodiment of the disclosure, the vibration structure 211 of each of the first vibration generator 210 and the second vibration generator 230 can include a vibration portion 211a, a first electrode portion 211b, and a second electrode portion 211c. For example, the vibration portion 211a can include a piezoelectric material. The vibration portion 211a can include a plurality of first portions 211a1 and a plurality of second portions 211a2.

[0645] The cushion member 700 can be disposed at the lowermost vibration generator among the plurality of vibration generators. For example, the cushion member 700 can be disposed at the second vibration generator 230. The cushion member 700 can be further disposed at the center of the vibration device 200. For example, the cushion member 700 can be disposed at the center of the first vibration generator 210 and the center of the second vibration generator 230. For example, the cushion member 700 can overlap the plurality of vibration generators 210 and 230. For example, the cushion member 700 can overlap the vibration structure 211. For example, the cushion member 700 can be disposed over the entire plurality of first portions 211a1 but not over the plurality of second portions 211a2. For example, the cushion member 700 can be disposed over the entire plurality of first portions 211a1. For example, the end of the cushion member 700 can correspond to the plurality of first portions 211a1. Since the cushion member 700 is disposed at the plurality of first portions 211a1 but not at the plurality of second portions 211a2, the fixing force of the vibration device 200 can be more enhanced. Accordingly, the tilting phenomenon can be more enhanced based on the vibration of the vibration device 200.

[0646] FIG. 24 A vibration device according to another embodiment of the disclosure is illustrated. FIG. 25 is a cross-sectional view taken along FIG. 24 line VIII-VIII' shown in FIG. 8. FIG. 24 and FIG. 25 An embodiment of the disclosure is illustrated by adding a cushion member to the vibration device described above with reference to FIG. 15 to FIG. 16E Therefore, hereinafter, the description of elements other than the cushion member will be omitted or briefly given below. Also, the description of the cushion member can be the same as or similar to that given above with reference to FIG. 19 and thus is omitted or will be briefly given below.

[0647] With reference to FIG. 24 and FIG. 25 In the vibration device 200 according to another embodiment of the disclosure, each of the first vibration generator 210 and the second vibration generator 230 can include at least one or more vibration structures 200A to 200D or a plurality of vibration structures 200A to 200D. In FIG. 24 and FIG. 25 In the above, an example in which four vibration structures are disposed is illustrated, and each of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the disclosure can be configured with one or two or more vibration structures.

[0648] Each of the first vibration generator 210 and the second vibration generator 230 according to another embodiment of the disclosure can include the first vibration structure 200A to the fourth vibration structure 200D. For example, the first vibration structure 200A to the fourth vibration structure 200D can be electrically disconnected from each other and can be separated from each other in the first direction X and the second direction Y. The first vibration structure 210A and the second vibration structure 210B can be separated from each other in the first direction X. The third vibration structure 210C and the fourth vibration structure 210D can be separated from each other in the first direction X. For example, each of the first vibration structure 200A to the fourth vibration structure 200D can include a vibration portion 211a, a first electrode portion 211b, and a second electrode portion 211c. For example, the vibration portion 211a can include a piezoelectric material. Each of the first vibration generator 210 and the second vibration generator 230 can further include a first protection member 213 and a second protection member 215.

[0649] For example, the vibration portion 211a included in each of the first vibration generator 210 and the second vibration generator 230 can include a plurality of first portions 211a1 and a second portion 211a2 disposed between the plurality of first portions 211a1.

[0650] The vibration device according to another embodiment of the disclosure can further include a spacer member. The spacer member can be disposed at the lowermost vibration generator among the plurality of vibration generators 210 and 230. For example, the spacer member can be disposed at the second vibration generator 230. For example, the spacer member can be disposed at each of the plurality of vibration structures included in the plurality of vibration generators 210 and 230. For example, the spacer member can be disposed on each of the plurality of vibration structures included in the plurality of vibration generators 210 and 230. For example, the spacer member 700 can overlap the plurality of vibration generators 210 and 230. For example, the spacer member 700 can overlap the vibration structure 211.

[0651] The first spacer member 701 can be disposed at the first vibration structure 200A. For example, the first spacer member 701 can be disposed at the first vibration structure 200A of each of the first vibration generator 210 and the second vibration generator 230. The first spacer member 701 can be disposed at the center of the first vibration structure 200A. For example, the first spacer member 701 can be disposed at the plurality of first portions 211a1 of the vibration structure 211 of the first vibration structure 200A. For example, the first spacer member 701 can be disposed over the entire plurality of first portions 211a1. For example, the first spacer member 701 can be disposed over the entire plurality of first portions 211a1, instead of being disposed on the plurality of second portions 211a2. For example, the end of the first spacer member 701 can correspond to the plurality of first portions 211a1.

[0652] For example, the second spacer member 702 can be disposed at the second vibration structure 200B. For example, the second spacer member 702 can be disposed at the second vibration structure 200B of each of the first vibration generator 210 and the second vibration generator 230. The second spacer member 702 can be disposed at the center of the second vibration structure 200B. For example, the second spacer member 702 can be disposed at the plurality of first portions 211a1 of the vibration structure 211 of the second vibration structure 200B. For example, the second spacer member 702 can be disposed over the entire plurality of first portions 211a1. For example, the second spacer member 702 can be disposed over the entire plurality of first portions 211a1 instead of over the plurality of second portions 211a2. For example, the end of the second spacer member 702 can correspond to the plurality of first portions 211a1.

[0653] For example, the third spacer member 703 can be disposed at the third vibration structure 200C. For example, the third spacer member 703 can be disposed at the third vibration structure 200C of each of the first vibration generator 210 and the second vibration generator 230. The third spacer member 703 can be disposed at the center of the third vibration structure 200C. For example, the third spacer member 703 can be disposed at the plurality of first portions 211a1 of the vibration structure 211 of the third vibration structure 200C. For example, the fourth spacer member 704 can be disposed at the fourth vibration structure 200D of each of the first vibration generator 210 and the second vibration generator 230. The fourth spacer member 704 can be disposed at the center of the fourth vibration structure 200D. For example, the fourth spacer member 704 can be disposed at the plurality of first portions 211a1 of the vibration structure 211 of the fourth vibration structure 200D. For example, the third spacer member 703 and the fourth spacer member 704 can be disposed over the entire plurality of first portions 211a1. For example, the third spacer member 703 and the fourth spacer member 704 can be disposed over the entire plurality of first portions 211a1 instead of over the plurality of second portions 211a2. For example, the end of the third spacer member 703 and the end of the fourth spacer member 704 can correspond to the plurality of first portions 211a1. According to an embodiment of the disclosure, a spacer member can be disposed at each of the first vibration structure 200A to the fourth vibration structure 200D, and thus, each of the first vibration structure 200A to the fourth vibration structure 200D can have an effect of being fixed to the support member 300, thereby reducing a tilting phenomenon that occurs when each of the first vibration structure 200A to the fourth vibration structure 200D moves to a free end. Thus, because the spacer member is configured in each of the first vibration structure 200A to the fourth vibration structure 200D, a device having enhanced sound characteristics and / or enhanced sound pressure level characteristics can be provided, thereby providing clearer sound.

[0654] FIG. 26 A vibration device according to another embodiment of the disclosure is illustrated. FIG. 27 is a cross-sectional view taken along FIG. 26 line IX-IX' shown in FIG. 1. FIG. 26 and FIG. 27 Embodiments of the disclosure implemented by modifying the spacer member shown in FIG. 25 and FIG. 26 FIGS. 1 and 2 differently are illustrated. Accordingly, hereinafter, the description of elements other than the spacer member is omitted or will be briefly given below. Also, the description of the spacer member can be the same as or similar to that given above with reference to FIG. 19 FIGS. 1 and 2, and thus is omitted or will be briefly given below.

[0655] With reference to FIG. 26 and FIG. 27 , in a vibration device 200 according to another embodiment of the disclosure, each of the first vibration generator 210 and the second vibration generator 230 can include at least one or more vibration structures 200A to 200D or a plurality of vibration structures 200A to 200D. In FIG. 26 and FIG. 27 , an example in which four vibration structures are provided is illustrated, and each of the first vibration generator 210 and the second vibration generator 230 according to an embodiment of the disclosure can be configured with one or two or more vibration structures.

[0656] The spacer member 705 can be provided at the lowermost vibration generator among the plurality of vibration generators 210 and 230. For example, the spacer member 705 can be provided at the second vibration generator 230. For example, the spacer member 705 can be provided between a plurality of vibration structures included in the plurality of vibration generators 210 and 230.

[0657] The spacer member 705 can be provided between the first vibration structure 200A and the fourth vibration structure 200D. For example, the spacer member 705 can be provided at a boundary between the first vibration structure 200A and the fourth vibration structure 200D.

[0658] The size of the spacer member 705 can be greater than or equal to a boundary region between the first vibration structure 200A and the fourth vibration structure 200D. For example, the size of the spacer member 705 can be greater than or equal to the interval D1 between the first vibration structure 200A and the second vibration structure 200B.

[0659] For example, the size of the spacer member 705 can vary in a direction of arrangement in which the plurality of first portions 211a1 a...

Claims

1. A vibration generating device, the vibration generating device comprising: Display panel, the display panel being configured to display images; A vibration device disposed on the rear surface of the display panel and configured to cause the display panel to vibrate; A support member located on the rear surface of the display panel; as well as A pad component, located between the vibrating device and the supporting component. The vibration device includes: Multiple vibration generators; and Adhesive components between the plurality of vibration generators The second vibration generator among the plurality of vibration generators is stacked on top of the first vibration generator among the plurality of vibration generators, and Each of the plurality of vibration generators includes a plurality of vibration structures, which are electrically disconnected from each other and spaced apart from each other.

2. The vibration generating device according to claim 1, wherein the vibration generating device further comprises a connecting member disposed between the display panel and the vibration device.

3. The vibration generation apparatus according to claim 1, wherein Each of the plurality of vibration generators is configured to vibrate in the same direction and / or stacked on top of each other.

4. The vibration generation apparatus according to claim 1, wherein Each of the plurality of vibration generators is configured to have the same size.

5. The vibration generation apparatus according to claim 1, wherein The end of each of the plurality of vibration generators is aligned in a direction perpendicular to the front surface of the display panel.

6. The vibration generation apparatus according to claim 1, wherein The plurality of vibrating structures are arranged along a first direction and a second direction intersecting the first direction.

7. The vibration generating device according to claim 1, wherein, The pad component is disposed between the plurality of vibrating structures.

8. The vibration generating device according to claim 1, wherein, The pad component is disposed at each of the plurality of vibrating structures.

9. The vibration generating device according to claim 1, wherein, The pad members are disposed on each of the plurality of vibration structures and between adjacent pad members disposed at each of the plurality of vibration structures.

10. The vibration generating device according to claim 1, wherein, The pad component is disposed between at least two or more vibrating structures.

11. The vibration generating device according to claim 1, wherein, The pad component overlaps with at least one of the plurality of vibrating structures.

12. The vibration generating device according to claim 1, wherein, The pad block components are configured in multiple ways; and One of the pad components overlaps with at least two or more of the plurality of vibrating structures.

13. The vibration generating device according to claim 1, wherein, The pad component is positioned adjacent to the plurality of vibration structures.

14. The vibration generating device according to claim 1, wherein, The pad component overlaps with two adjacent vibration structures among the plurality of vibration structures.

15. The vibration generating device according to claim 1, wherein, The pad block component is disposed at each of at least two or more vibrating structures.

16. The vibration generating device according to claim 1, wherein, The pad members are disposed at each of at least two or more vibrating structures, and are disposed between adjacent pad members disposed at each of the at least two or more vibrating structures.

17. The vibration producing apparatus of any one of claims 1 to 5, wherein, Each of the plurality of vibration generators includes: A first protective member is disposed on a first surface of the vibrating structure; and The second protective member is disposed on a second surface of the vibrating structure that is different from the first surface.

18. The vibration generation device of claim 17, wherein, Each of the plurality of vibration generators also includes: A first adhesive layer is disposed between the vibrating structure and the first protective member; and A second adhesive layer is disposed between the vibrating structure and the second protective member.

19. The vibration generation device of claim 17, wherein, The vibrating structure includes: Vibrating part; A first electrode portion, wherein the first electrode portion is disposed between the vibrating portion and the first protective member; and The second electrode portion is disposed between the vibrating portion and the second protective member.

20. The vibration generation device of claim 19, wherein, The vibrating part includes a plurality of first parts and a second part disposed between the plurality of first parts.

21. A vibration generating device, the vibration generating device comprising: Display panel, the display panel being configured to display images; A vibration device, the vibration device being located on the rear surface of the display panel; A plate, located between the display panel and the vibration device; A support member is disposed on the rear surface of the display panel; as well as A pad component, located between the vibrating device and the supporting component. The vibration device includes: Multiple vibration generators; and Adhesive components between the plurality of vibration generators The second vibration generator among the plurality of vibration generators is stacked on top of the first vibration generator among the plurality of vibration generators, and Each of the plurality of vibration generators includes a plurality of vibration structures, which are electrically disconnected from each other and spaced apart from each other.

22. The vibration generating device according to claim 21, wherein the vibration generating device further comprises a connecting member disposed between the display panel and the vibration device.

23. The vibration generating device of claim 21, further comprising a plate connecting member configured to connect the plate to the rear surface of the display panel.

24. The vibration generating device according to claim 21, wherein, The display panel includes a first area and a second area; and The vibration device includes a first vibration device disposed in the first region and a second vibration device disposed in the second region.

25. The vibration generating device according to claim 24, further comprising a separator disposed between the rear surface of the display panel and the support member, and between the first region and the second region.

26. The vibration generation device of claim 24, wherein, The pad component is disposed at each of the first vibrating device and the second vibrating device.

27. The vibration generation device of claim 24, wherein, The vibration device also includes: A third vibration device, wherein the third vibration device is disposed in the first region; and A fourth vibration device is disposed in the second region.

28. The vibration generating device according to claim 27, wherein, The first vibrating device and the third vibrating device are arranged parallel to or staggered with each other in the first region; and The second and fourth vibrating devices are arranged parallel to or staggered to each other in the second region.

29. The vibration generation device of claim 27, wherein, The pad component is disposed at each of the third and fourth vibrating devices.

30. The vibration producing apparatus of any one of claims 21 to 29, wherein, Each of the plurality of vibration generators also includes: A first protective member is disposed on a first surface of the vibrating structure; and The second protective member is disposed on a second surface of the vibrating structure that is different from the first surface.

31. The vibration generation device of claim 30, wherein, Each of the plurality of vibration generators also includes: A first adhesive layer is disposed between the vibrating structure and the first protective member; and A second adhesive layer is disposed between the vibrating structure and the second protective member.

32. The vibration generating device according to claim 30, further comprising: A first vibration drive line, configured to transmit a first vibration drive signal to the vibration structure; as well as A second vibration drive line is configured to transmit a second vibration drive signal to the vibration structure.

33. The vibration generation device of claim 30, wherein, The vibrating structure includes: Vibrating part; A first electrode portion, wherein the first electrode portion is disposed between the vibrating portion and the first protective member; and The second electrode portion is disposed between the vibrating portion and the second protective member.

34. The vibration generation device of claim 33, wherein, The vibrating part includes a plurality of first parts and a second part disposed between the plurality of first parts.

35. The vibration generating device according to claim 33, further comprising: A first power line is connected to one of the first electrode portion and the second electrode portion; as well as A second power line is connected to the other of the first electrode portion and the second electrode portion, and is spaced apart from the first power line in a plane parallel to the front and rear surfaces of the display panel.

36. The vibration generation device of claim 24, wherein, Each of the first vibrating device and the second vibrating device includes: The plurality of vibration generators; and The adhesive member located between the plurality of vibration generators, and In each of the first vibration device and the second vibration device, the second vibration generator of the plurality of vibration generators is stacked on the first vibration generator of the plurality of vibration generators.

37. The vibration generating device according to claim 24, wherein, The vibration device also includes: A third vibration device, wherein the third vibration device is disposed in the first region; and A fourth vibration device is disposed in the second region, and Each of the third vibration device and the fourth vibration device includes: The plurality of vibration generators; and The adhesive member located between the plurality of vibration generators, and In each of the first vibration device and the second vibration device, the second vibration generator of the plurality of vibration generators is stacked on the first vibration generator of the plurality of vibration generators.

38. The vibration generation device of claim 36 or 37, wherein, Each of the plurality of vibration generators includes: The vibrating part comprises a plurality of inorganic material parts having piezoelectric properties and an organic material part located between the plurality of inorganic material parts; A first electrode portion, wherein the first electrode portion is disposed on a first surface of the vibrating portion; and The second electrode portion is disposed on a second surface of the vibrating portion that is different from the first surface.

39. The vibration generating device according to claim 38, further comprising a first power line and a second power line, the first power line being connected to the first electrode portion and the second power line being connected to the second electrode portion. wherein, The second power line is spaced apart from the first power line in a plane parallel to the front and rear surfaces of the display panel.

40. The vibration generating device according to claim 38, wherein, Some of the plurality of vibration generators overlap in a direction perpendicular to the front surface of the display panel; The inorganic material portion of the vibration generator positioned closer to the front surface of the display panel overlaps with the inorganic material portion of another vibration generator positioned less close to the front surface of the display panel; and / or The organic material portion of the vibration generator positioned closer to the front surface of the display panel overlaps with the organic material portion of the other vibration generator positioned less close to the front surface of the display panel.

41. The vibration generating device according to claim 38, further comprising a first power line and a second power line. wherein Some of the plurality of vibration generators overlap in a direction perpendicular to the front surface of the display panel. Specifically, a first electrode portion positioned closer to the front surface of the display panel and a first electrode portion positioned less close to the front surface of the display panel are connected to the first power line, and The second electrode portion, which is positioned closer to the front surface of the display panel, and the second electrode portion, which is positioned less close to the front surface of the display panel, are connected to the second power line.

42. The vibration generation device of claim 36 or 37, wherein, The adhesive component includes a first adhesive layer and a second adhesive layer, and The plurality of vibration structures are arranged along a first direction and a second direction intersecting the first direction. Each of the plurality of vibration generators further includes: A first protective member, wherein the first protective member is disposed on a first surface of each of the plurality of vibrating structures via the first adhesive layer; and The second protective member is disposed on the second surface of each of the plurality of vibrating structures via the second adhesive layer.

43. The vibration generation device of claim 42, wherein, The plurality of vibrating structures are arranged at intervals of 0.1 mm or greater but less than 5 mm.

44. The vibration generating device according to claim 42, further comprising: A first vibration drive line, configured to transmit a first vibration drive signal to the plurality of vibration structures; as well as A second vibration drive line is configured to transmit a second vibration drive signal to the plurality of vibration structures.

45. The vibration generation device of claim 42, wherein, The pad component is disposed between the plurality of vibration structures included in each of the plurality of vibration generators.

46. The vibration producing apparatus of claim 42 wherein, The pad component is disposed at the plurality of vibration structures included in each of the plurality of vibration generators.

47. The vibration producing apparatus of claim 42 wherein, The pad members are disposed at each of the plurality of vibration structures included in each of the plurality of vibration generators and between adjacent pad members disposed on each of the plurality of vibration structures.

48. The vibration generating device according to claim 21, wherein, The pad component is configured to be adjacent to multiple vibration structures.

49. The vibration generating device according to claim 21, wherein, The pad component overlaps with two adjacent vibration structures.

50. The vibration generating device according to claim 21, wherein, The pad component overlaps with at least one of the plurality of vibrating structures.

51. The vibration generating device according to claim 21, wherein, The pad block components are configured in multiple ways; and One of the pad components overlaps with at least two or more of the vibrating structure.

52. The vibration producing apparatus of claim 42 wherein, Each of the plurality of vibrating structures includes: Vibrating part; A first electrode portion, wherein the first electrode portion is disposed between the vibrating portion and the first protective member; and The second electrode portion is disposed between the vibrating portion and the second protective member.

53. The vibration generating device according to claim 52, wherein, The vibrating component includes: Multiple inorganic material components; and An organic material portion is located between the plurality of inorganic material portions.

54. The vibration generating device according to claim 42, wherein, Each of the plurality of vibrating structures includes: Vibrating part; A first electrode portion, wherein the first electrode portion is disposed on a first surface of the vibrating portion; and The second electrode portion is disposed on a second surface of the vibrating portion that is different from the first surface, and In each of the plurality of vibration structures, the first electrode portion is positioned closer to the display panel than the second electrode portion.

55. The vibration generating device according to claim 54, further comprising a vibration driving circuit, the vibration driving circuit including a plurality of amplifiers respectively connected to the plurality of vibration generators. in, The plurality of vibration generators includes a first group and a second group. The plurality of amplifiers includes a first amplifier group and a second amplifier group. The amplifier in 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. The amplifier in 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.

56. The vibration generating device according to claim 42, in, Each of the plurality of vibrating structures includes: Vibrating part; A first electrode portion, wherein the first electrode portion is disposed on a first surface of the vibrating portion; and The second electrode portion is disposed on a second surface of the vibrating portion that is different from the first surface. The plurality of vibration generators include a first group and a second group. In the vibration generator of the first group, the first electrode portion is positioned closer to the display panel than the second electrode portion, and In the vibration generator of the second group, the second electrode portion is positioned closer to the display panel than the first electrode portion.

57. The vibration generating device according to claim 56, further comprising a vibration driving circuit, the vibration driving circuit including a plurality of amplifiers respectively connected to the plurality of vibration generators. in, Each of the plurality of amplifiers includes: A first output terminal, the first output terminal being connected to the first electrode portion of a respective vibration generator among the plurality of vibration generators; and The second output terminal is connected to the second electrode portion of the respective vibration generator among the plurality of vibration generators.

58. A vibration generating device, the vibration generating device comprising: Vibrating components; A vibration device, wherein the vibration device is located at the vibration component; as well as A pad component, located at the vibrating device. The vibration device includes: Multiple vibration generators; and Adhesive components between the plurality of vibration generators The second vibration generator among the plurality of vibration generators is stacked on top of the first vibration generator among the plurality of vibration generators, and Each of the plurality of vibration generators includes a plurality of vibration structures, which are electrically disconnected from each other and spaced apart from each other.

59. The vibration generating device according to claim 58, wherein, The vibrating component includes a plate, and The board may be a metallic material, or a single non-metallic material or a composite non-metallic material selected from wood, plastic, glass, cloth, paper and leather.

60. The vibration generating device according to claim 59, wherein, Each of the vibrating components and the plates has the same dimensions.

61. The vibration generating device according to claim 58, wherein, Each of the plurality of vibration generators is configured to vibrate in the same direction and / or is configured to have the same size.

62. The vibration generating device according to claim 58, wherein, The pad component is disposed at each of the plurality of vibrating structures.

63. The vibration generating device according to claim 58, wherein, The pad component is disposed between the plurality of vibrating structures.

64. The vibration generating device according to claim 58, wherein, The pad members are disposed at each of the plurality of vibration structures and between adjacent pad members disposed at each of the plurality of vibration structures.

65. The vibration generating device according to claim 58, wherein, The pad component is located at each of the plurality of vibration structures included in the lowest vibration generator among the plurality of vibration generators.

66. The vibration generating device according to claim 58, wherein, The pad component is located between multiple vibration structures included in the lowest vibration generator among the plurality of vibration generators.

67. The vibration generating device according to claim 58, wherein, The pad component is located at each of the plurality of vibration structures included in the lowest vibration generator among the plurality of vibration generators, and is disposed at each of the plurality of vibration structures.

68. The vibration generating device according to claim 58, wherein, The pad component is positioned adjacent to the plurality of vibration structures.

69. The vibration generating device according to claim 58, wherein, The pad component overlaps with at least two or more vibrating structures.

70. The vibration generating device according to claim 58, wherein, The pad members are disposed at each of at least two or more vibrating structures and between adjacent pad members disposed at each of the at least two or more vibrating structures.

71. The vibration generating device according to claim 58, wherein, The pad member overlaps with at least two or more vibration structures and is disposed between adjacent pad members disposed at the at least two or more vibration structures.

72. The vibration generating device according to claim 58, wherein, The pad component overlaps with at least one of at least two or more vibrating structures.

73. The vibration generating device according to claim 58, wherein, The pad block components are configured in multiple ways; and One of the pad components overlaps with at least two or more vibrating structures.

74. The vibration generating device according to claim 58, wherein, The vibrating component includes a display panel comprising a plurality of pixels configured to display an image, or the vibrating component includes one or more non-display panels among a light-emitting diode illumination panel, an organic light-emitting illumination panel, and an inorganic light-emitting illumination panel.

75. The vibration generating device according to claim 58, wherein, The vibrating component includes one or more of the following: a screen panel, a lighting panel, a sign panel, vehicle interior materials, vehicle windows, vehicle exterior materials, building roof materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and a reflector, on which an image is projected from a display device.

76. The vibration generating device according to any one of claims 58 to 61, 74 and 75, wherein, Each of the plurality of vibration generators includes: The vibrating part comprises a plurality of inorganic material parts having piezoelectric properties and an organic material part located between the plurality of inorganic material parts; A first electrode portion, wherein the first electrode portion is disposed on a first surface of the vibrating portion; and The second electrode portion is disposed on a second surface of the vibrating portion that is different from the first surface.

77. The vibration generating device according to claim 76, further comprising a first power line and a second power line. in, Some of the plurality of vibration generators overlap in a direction perpendicular to the front surface of the vibration member. The first electrode portion positioned near the front surface of the vibrating member and the first electrode portion of the vibration generator positioned less close to the front surface of the vibrating member are connected to the first power line, and The second electrode portion of the vibration generator, positioned close to the front surface of the vibrating member, and the second electrode portion of the vibration generator, positioned less close to the front surface of the vibrating member, are connected to the second power line.

78. The vibration generating device according to claim 77, wherein, The first power line connected to the first electrode portion of the vibration generator, which is positioned close to the front surface of the vibration member, does not overlap with the second power line connected to the second electrode portion of the vibration generator, which is positioned close to the front surface of the vibration member.

79. The vibration generating device according to claim 77, wherein, The first power line connected to the first electrode portion of the vibration generator, which is positioned not too close to the front surface of the vibrating member, does not overlap with the second power line connected to the second electrode portion of the vibration generator, which is positioned not too close to the front surface of the vibrating member.

80. The vibration generating device according to claim 76, further comprising a first power line and a second power line, the first power line being connected to the first electrode portion and the second power line being connected to the second electrode portion. in, The second power line is spaced apart from the first power line in a plane parallel to the front and rear surfaces of the vibrating member.

81. The vibration generating device according to any one of claims 58 to 61, 74 and 75, wherein, Each of the plurality of vibration generators also includes: A first electrode portion located on a first surface of one of at least two or more vibration structures and a second electrode portion located on a surface different from the first surface; A third electrode portion located on the first surface of another vibration structure among the at least two or more vibration structures, and a fourth electrode portion located on a surface different from the first surface; and A first power line connected to the first electrode portion and the second electrode portion, and a second power line connected to the second electrode portion and the fourth electrode portion.

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