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US-12622176-B2 - Vibration apparatus and apparatus including the same

US12622176B2US 12622176 B2US12622176 B2US 12622176B2US-12622176-B2

Abstract

The vibration apparatus may include a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion, a first cover member at a first surface of the vibration generating portion, a second cover member at a second surface different from the first surface of the vibration generating portion, and a signal cable including first, second and third signal lines connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member. An apparatus for vibration may include a passive vibration member and the vibration apparatus.

Inventors

  • Sungwook KO
  • SeungRyull PARK
  • Mingyu Kang

Assignees

  • LG DISPLAY CO., LTD.

Dates

Publication Date
20260505
Application Date
20221007
Priority Date
20211231

Claims (20)

  1. 1 . A vibration apparatus, comprising: a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion; a first cover member at a first surface of the vibration generating portion; a second cover member at a second surface different from the first surface of the vibration generating portion; and a signal cable including first, second and third signal lines connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member, wherein the vibration generating portion further comprises: a first adhesive layer between the first cover member and the first surface of the vibration generating portion; and a second adhesive layer between the second cover member and the second surface of the vibration generating portion, wherein an end portion of the signal cable is accommodated at a portion between one periphery portion of the first cover member and one periphery portion of the second cover member, wherein the signal cable is integrated with the vibration generating portion, wherein each of the first to third signal lines of the signal cable protrudes from the end portion of the signal cable, and wherein in the portion between the one periphery portion of the first cover member and the one periphery portion of the second cover member, the first adhesive layer is between the first cover member and the end portion of the signal cable, and the second adhesive layer is between the second cover member and the end portion of the signal cable.
  2. 2 . The vibration apparatus of claim 1 , wherein the second vibration portion comprises a cut portion exposing a portion of the first vibration portion, and wherein the first vibration portion comprises an exposure region facing the second cover member through the cut portion.
  3. 3 . The vibration apparatus of claim 2 , wherein one of the first, second and third signal lines is connected to the exposure region of the first vibration portion.
  4. 4 . The vibration apparatus of claim 1 , wherein each of the first vibration portion and the second vibration portion comprises: a vibration layer including a piezoelectric material; a first electrode layer at a first surface of the vibration layer; and a second electrode layer at a second surface different from the first surface of the vibration layer.
  5. 5 . The vibration apparatus of claim 4 , wherein the first electrode layer of the second vibration portion contacts the second electrode layer of the first vibration portion.
  6. 6 . The vibration apparatus of claim 5 , wherein: the second vibration portion comprises a cut portion exposing a portion of the second electrode layer of the first vibration portion; and one of the first, second and third signal lines is connected to a portion of the second electrode layer of the first vibration portion exposed by the cut portion of the second vibration portion.
  7. 7 . The vibration apparatus of claim 5 , wherein: the second vibration portion comprises a cut portion exposing a portion of the second electrode layer of the first vibration portion; the vibration generating portion further comprises a line connection member connecting one of the first, second and third signal lines to the second electrode layer of the first vibration portion exposed by the cut portion of the second vibration portion; and one of the first, second and third signal lines is connected to the second electrode layer of the first vibration portion, exposed by the cut portion of the second vibration portion, through the line connection member.
  8. 8 . The vibration apparatus of claim 5 , wherein: the second vibration portion comprises a cut portion exposing a portion of the second electrode layer of the first vibration portion; the first signal line is connected to the first electrode layer of the first vibration portion, the second signal line is connected to the second electrode layer of the second vibration portion; and the third signal line is connected to a portion of the second electrode layer of the first vibration portion exposed by the cut portion of the second vibration portion.
  9. 9 . The vibration apparatus of claim 1 , wherein the vibration generating portion further comprises an adhesive member between a periphery portion of the first vibration portion and a periphery portion of the second vibration portion.
  10. 10 . The vibration apparatus of claim 4 , wherein one or more of the second electrode layer of the first vibration portion and the first electrode layer of the second vibration portion comprise one or more slits.
  11. 11 . The vibration apparatus of claim 10 , wherein: the vibration generating portion further comprises an adhesive member between a periphery portion of the first vibration portion and a periphery portion of the second vibration portion; and the adhesive member comprises one or more separation portions communicating with the one or more slits.
  12. 12 . The vibration apparatus of claim 4 , wherein the vibration generating portion further comprises an adhesive layer between the second electrode layer of the first vibration portion and the first electrode layer of the second vibration portion.
  13. 13 . The vibration apparatus of claim 1 , wherein the vibration generating portion further comprises a contact member between the first vibration portion and the second vibration portion.
  14. 14 . The vibration apparatus of claim 13 , wherein the contact member is a conductive double-sided adhesive member.
  15. 15 . The vibration apparatus of claim 13 , wherein: the contact member comprises a protrusion portion protruding from the vibration generating portion; and one of the first, second and third signal lines is connected to a portion of the protrusion portion.
  16. 16 . The vibration apparatus of claim 1 , wherein: the vibration generating portion further comprises a third vibration portion overlapping the first vibration portion; and the signal cable further comprises a fourth signal line connected to the third vibration portion.
  17. 17 . The vibration apparatus of claim 16 , wherein each of the first, second and third vibration portions comprises: a vibration layer including a piezoelectric material; a first electrode layer at a first surface of the vibration layer; and a second electrode layer at a second surface different from the first surface of the vibration layer.
  18. 18 . The vibration apparatus of claim 17 , wherein: the first electrode layer of the second vibration portion contacts the second electrode layer of the first vibration portion; and the first electrode layer of the first vibration portion contacts the second electrode layer of the third vibration portion.
  19. 19 . The vibration apparatus of claim 17 , wherein: the second vibration portion comprises a first cut portion exposing a first region of the second electrode layer of the first vibration portion; and the third vibration portion comprises a second cut portion exposing a second region of the first electrode layer of the first vibration portion.
  20. 20 . The vibration apparatus of claim 19 , wherein: the first signal line is connected to a portion of the first electrode layer of the first vibration portion exposed by the second cut portion of the third vibration portion; the second signal line is connected to the second electrode layer of the second vibration portion; the third signal line is connected to a portion of the second electrode layer of the first vibration portion exposed by the first cut portion of the second vibration portion; and the fourth signal line is connected to the first electrode layer of the third vibration portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of and priority to Korean Patent Application No. 10-2021-0194787 filed on Dec. 31, 2021, the entirety of which is hereby incorporated by reference for all purposes. BACKGROUND 1. Technical Field The present disclosure relates to apparatuses and particularly to, for example, without limitation, a vibration apparatus and an apparatus including the same. 2. Discussion of the Related Art Recently, the need for slimming and thinning electronic devices is increasing. In addition, as speakers applied to electronic devices and the like need to be slim and thin, instead of voice coils, piezoelectric elements capable of realizing a thin thickness are attracting much attention. Speakers or vibration apparatuses with a piezoelectric element applied thereto may be driven or vibrated by a driving power or a driving signal supplied through a signal cable. General vibration apparatuses (or film actuators) include a film which includes a pad electrode and a line for applying a driving power to a piezoelectric element. The general vibration apparatuses need a process of patterning the line and the pad electrode on the film and a soldering process of electrically connecting the pad electrode to a signal cable. The description provided in the discussion of the related art section should not be assumed to be prior art merely because it is mentioned in or associated with that section. The discussion of the related art section may include information that describes one or more aspects of the subject technology, and the description in this section does not limit the invention. SUMMARY The inventors have recognized the problems described above as well as the problems and disadvantages of the related art and have performed extensive research and experiments for implementing a vibration apparatus in which a manufacturing process and a structure of the vibration apparatus may be simplified. Through the extensive research and experiments, the inventors have invented a vibration apparatus having a new structure and an apparatus including the same, in which a manufacturing process and a structure of the vibration apparatus may be simplified. One or more aspects of the present disclosure are directed to providing a vibration apparatus and an apparatus including the same, in which a manufacturing process and a structure may be simplified. One or more aspects of the present disclosure are directed to providing a vibration apparatus and an apparatus including the same, in which a sound characteristic may be enhanced. Accordingly, one or more example embodiments of the present disclosure are directed to an apparatus that substantially obviates one or more of the problems due to limitations and disadvantages of the related art. Additional features, advantages, and aspects of the present disclosure are set forth in part in the description that follows and in part will become apparent from the present disclosure or may be learned by practice of the inventive concepts provided herein. Other features, advantages, and aspects of the present disclosure may be realized and attained by the descriptions provided in the present disclosure, or derivable therefrom, and the claims hereof as well as the appended drawings. To achieve these and other advantages and aspects of the present disclosure, as embodied and broadly described herein, in one or more aspects, a vibration apparatus may comprise a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion, a first cover member at a first surface of the vibration generating portion, a second cover member at a second surface different from the first surface, and a signal cable including first to third signal lines connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member. In one or more aspects, an apparatus may comprise a passive vibration member, and a vibration generating apparatus connected to the passive vibration member and configured to include a vibration apparatus to vibrate the passive vibration member. The vibration apparatus may comprise a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion, a first cover member at a first surface of the vibration generating portion, a second cover member at a second surface different from the first surface, and a signal cable including first to third signal lines connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member. According to one or more example embodiments of the present disclosure, a vibration apparatus and an apparatus including the same, where a manufacturing process and a structure of the vibration apparatus may be simplified, may be provided.