公开(公告)号：USD847768S1

公开(公告)日：2019-05-07

申请号：US29613596

申请日：2017-08-11

Applicant: TDK CORPORATION

Designer： Kaoru Kijima ,  Tatsuya Taki

公开(公告)号：US12245514B2

公开(公告)日：2025-03-04

申请号：US17604463

申请日：2020-05-12

Applicant: TDK CORPORATION

Inventor： Kazuki Saito ,  Kaoru Kijima

IPC: H10N30/87 ,  B06B1/06 ,  G06F3/01

Abstract: A vibration device includes a vibration plate, a piezoelectric element, and a wiring member. The vibration plate has conductivity. The piezoelectric element is disposed on the vibration plate. The wiring member is disposed to oppose the vibration plate via the piezoelectric element. The piezoelectric element includes a piezoelectric element body, a first external electrode, and a second external electrode. The piezoelectric element body has a first main surface and a second main surface facing away from each other in an opposing direction of the vibration plate and the wiring member. The first external electrode is disposed on the first main surface and electrically connected to the vibration plate. The second external electrode is disposed on the second main surface and electrically connected to the wiring member. The vibration plate includes a first projection projecting toward the wiring member and electrically connected to the wiring member.

公开(公告)号：US12120483B2

公开(公告)日：2024-10-15

申请号：US17424257

申请日：2020-01-20

Applicant: TDK CORPORATION

Inventor： Yoshiki Ohta ,  Takuto Horii ,  Yoshikazu Shimura ,  Atsushi Ezawa ,  Miho Bamba ,  Kaoru Kijima ,  Akihiro Takeda

IPC: H01L41/047 ,  H04R1/24 ,  H04R7/04 ,  H04R17/00 ,  H10N30/20 ,  H10N30/50 ,  H10N30/87

CPC classification number: H04R1/24 ,  H04R7/04 ,  H04R17/00 ,  H10N30/2047 ,  H10N30/50 ,  H10N30/874 ,  H10N30/875

Abstract: An audio device includes a vibration member, and a first piezoelectric vibrator and a second piezoelectric vibrator that are provided on the vibration member. A natural frequency of the first piezoelectric vibrator is larger than a natural frequency of the second piezoelectric vibrator.

公开(公告)号：US20240298118A1

公开(公告)日：2024-09-05

申请号：US18422509

申请日：2024-01-25

Applicant: TDK Corporation

Inventor： Kaoru NARITA ,  Akira Satoh ,  Kaoru Kijima

IPC: H04R17/00 ,  H04R1/02 ,  H10N30/20 ,  H10N30/87 ,  H10N30/88

CPC classification number: H04R17/00 ,  H04R1/025 ,  H10N30/20 ,  H10N30/875 ,  H10N30/88 ,  H04R2400/11

Abstract: An acoustic device includes a piezoelectric element and a housing holding the piezoelectric element. The housing includes a vibrator having a main surface to which the piezoelectric element is bonded, and a frame body bonded to the main surface to surround the piezoelectric element. The frame body is disposed inward of an outer edge of the main surface when viewed in a direction perpendicular to the main surface.

公开(公告)号：US11968496B2

公开(公告)日：2024-04-23

申请号：US17908058

申请日：2021-03-05

Applicant: TDK CORPORATION

Inventor： Akira Satoh ,  Kaoru Kijima

IPC: H04R17/00

CPC classification number: H04R17/00

Abstract: An acoustic device 3 includes a piezoelectric element and a housing 30. The housing 30 includes a main body portion 31 and a rib portion 35. The main body portion 31 includes a vibrating portion 32 and a plurality of support portions 33. The rib portion 35 is connected to the main body portion 31. The rib portion 35 extends in a third direction between a pair of the support portions 34a and 341) facing each other and separated from each other in the third direction intersecting a second direction, when viewed from the second direction along a vibrating surface. A hollow region V is defined by the vibrating portion 32 and the plurality of support portions 33, The above opening S1 is defined by the rib portion 35 and the main body portion 31 and communicates with the hollow region V. The rib portion 35 covers the middle of the hollow region V when viewed from the second direction.

公开(公告)号：US11607707B2

公开(公告)日：2023-03-21

申请号：US16232431

申请日：2018-12-26

Applicant: TDK CORPORATION

Inventor： Kaoru Kijima ,  Kazuki Saito

IPC: B06B1/06 ,  H01L41/047 ,  B06B1/02 ,  H01L41/09 ,  H01L41/083 ,  H01L41/04 ,  G10K9/125

Abstract: A vibration device includes a piezoelectric element, a vibration member to which the piezoelectric element is bonded, and a wiring member connected with the piezoelectric element. A method for vibrating the vibration device includes inputting a signal including a fundamental frequency component to the piezoelectric element through the wiring member, and vibrating the vibration device in a vibration mode that includes the fundamental frequency component and does not approximately include a high order frequency component that is n times (n represents an integer of 2 or more) the fundamental frequency component. The fundamental frequency component is lower than the resonance frequency component of the vibration device.

公开(公告)号：US10511389B2

公开(公告)日：2019-12-17

申请号：US15230981

申请日：2016-08-08

Applicant: TDK CORPORATION

Inventor： Kaoru Kijima ,  Akira Satoh

IPC: H04B11/00 ,  H04R17/00 ,  G10K11/00 ,  B06B1/06

Abstract: Provided is a piezoelectric module capable of attempting further miniaturization. In the piezoelectric module, a resonance point is excluded from a frequency band of a transmitted signal to avoid shortening of a signal transmission distance, thereby attempting improvement in stability of communication. In addition, since a resonance space is not provided, further miniaturization may be easily attempted.

公开(公告)号：US10311853B2

公开(公告)日：2019-06-04

申请号：US15234825

申请日：2016-08-11

Applicant: TDK Corporation

Inventor： Akira Satoh ,  Kaoru Kijima

IPC: H01L41/053 ,  G10K9/122 ,  G10K9/22

Abstract: A piezoelectric sounding body includes: a piezoelectric vibrating plate; a case housing the piezoelectric vibrating plate; a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate. The case includes: a lower case where the first conductive terminal and the second conductive terminal are fixed; and an upper case configured to be fixed in a caulking manner to the lower case and to sandwich the piezoelectric vibrating plate between the upper case and the lower case.

公开(公告)号：USD838302S1

公开(公告)日：2019-01-15

申请号：US29613685

申请日：2017-08-11

Applicant: TDK CORPORATION

Designer： Kaoru Kijima ,  Tatsuya Taki

公开(公告)号：US11581479B2

公开(公告)日：2023-02-14

申请号：US16957191

申请日：2018-12-12

Applicant: TDK CORPORATION

Inventor： Yoshikazu Shimura ,  Kaoru Kijima ,  Hideya Sakamoto ,  Kazushi Tachimoto ,  Ryuhei Sasaki ,  Yoshiki Ohta ,  Akihiro Takeda

IPC: H01L41/083 ,  H01L41/047

Abstract: In a piezoelectric element, shift of a resonance point to a low-pitched sound side is achieved. A resonance point of a piezoelectric element moves to a low-pitched sound side when an active region is configured to be surrounded by an inactive region as in the configuration of the piezoelectric element. According to the piezoelectric element whose resonance point is moved to a low-pitched sound side, the piezoelectric element can realize a sound pressure that is sufficiently high for practical use when it is applied to an acoustic device.