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公开(公告)号：US20230012785A1
公开(公告)日：2023-01-19
申请号：US17860861
申请日：2022-07-08
Applicant: Alps Alpine Co., LTD
Inventor： Yuji Saito , Hiroki Toita , Hiroyuki Taguchi , Ryosuke Tachi , Tatsuya Mashiko
IPC: H04R3/00
Abstract: In a speaker distortion correction device, an input signal passes through a nonlinear-portion correction filter and is input into a linear inverse filter. An output signal from the linear inverse filter is output into a speaker through an amplifier. For the nonlinear-portion correction filter, transfer characteristics (filter coefficients) are set that eliminate distortion due to nonlinear characteristics of the speaker. With a difference, as an error, between vibration of the speaker without distortion relative to an input signal and vibration of a vibration system of the speaker measured by a vibration measurement unit, an adaptive-algorithm execution unit performs an adaptive operation that adaptively updates filter coefficients of the linear inverse filter. When the amplitude of vibration of the vibration system of the speaker measured by the vibration measurement unit deviates from a range that normal relative to an input voltage input into the speaker, a control unit stops the adaptive operation of the adaptive-algorithm execution unit.
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公开(公告)号：US20230269540A1
公开(公告)日：2023-08-24
申请号：US18107756
申请日：2023-02-09
Applicant: ALPS ALPINE CO., LTD.
Inventor： Hiroki Toita , Yusuke Yoshida
Abstract: A speaker includes a diaphragm having a perfectly circular hole in which a bobbin is attached and an oval or elliptical outer peripheral end. The diaphragm includes a perfectly circular cross-sectional area in the range of a predetermined height above a base having the perfectly circular hole. The diaphragm further includes an intermediate area whose outer surface has a small curvature radius above the perfectly circular cross-sectional area and an expanded area that is oval in cross section above the intermediate area.
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公开(公告)号：US20230057212A1
公开(公告)日：2023-02-23
申请号：US17886827
申请日：2022-08-12
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita
Abstract: A detection unit has a fixed magnet, which is part of a magnetic circuit unit, and also has a movable magnet and a magnetic sensor, which are disposed below a cap. A fixed magnetic field component oriented toward a vibration direction acts on the magnetic sensor due to a leakage flux from the magnetic circuit unit. A movable magnetic field component acts from the movable magnet on the magnetic sensor in a direction crossing the fixed magnetic field component. A change in the angle of a detection magnetic field component, which is a combined vector formed from the magnetic field components in two directions, is detected by the magnetic sensor. According to the output in this detection, the operational position of the movable magnet is measured.
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公开(公告)号：US11979728B2
公开(公告)日：2024-05-07
申请号：US17734281
申请日：2022-05-02
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita
CPC classification number: H04R9/027 , H04R3/002 , H04R9/025 , H04R9/043 , H04R9/046 , H04R9/06 , H04R2209/022 , H04R2400/11
Abstract: A vibrating unit includes a diaphragm and a bobbin, and a voice coil is secured to the bobbin. A detecting unit includes a moving magnet and a magnetic sensor. The magnetic sensor is disposed in a space surrounded by the bobbin, whereas the moving magnet is secured to an outer surface of the bobbin. Therefore, even when the moving magnet and a damper member move backward significantly, the magnetic sensor is prevented from being hit by the moving magnet and the damper member.
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公开(公告)号：US20230164491A1
公开(公告)日：2023-05-25
申请号：US17734319
申请日：2022-05-02
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita , Ryosuke Tachi , Ryo Ito
CPC classification number: H04R9/027 , H04R1/2803 , H04R9/046 , G01R33/072 , H04R2400/11
Abstract: A vibrating unit includes a diaphragm and a bobbin, and a voice coil is secured to the bobbin. A detecting unit includes a moving magnet and a magnetic sensor. An annular magnet support is secured to a front edge of the bobbin, and the moving magnet is positioned and secured to the magnet support. The magnetic sensor is secured to a drive supporting unit. The moving magnet is secured to the bobbin, with the magnet support therebetween. This facilitates mounting and positioning of the moving magnet.
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Patent Agency Ranking
公开(公告)号：US20240187793A1
公开(公告)日：2024-06-06
申请号：US18519506
申请日：2023-11-27
Applicant: Alps Alpine Co., Ltd.
Inventor： Ryo Ito , Yuji Saito , Katsuhiko Egami , Hiroki Toita
Abstract: A magnetic circuit section having a main magnetic gap and sub-magnetic gaps is used. A vibrator is vibrated by an electromagnetic force generated by a voice current, which flows through a voice coil and a magnetic flux crossing the main magnetic gap. When the voice coil approaches or enters a sub-magnetic gap, the voice current which flows through the voice coil is reversed, temporarily cut-off or attenuated.
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公开(公告)号：US20220312123A1
公开(公告)日：2022-09-29
申请号：US17734281
申请日：2022-05-02
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita
Abstract: A vibrating unit includes a diaphragm and a bobbin, and a voice coil is secured to the bobbin. A detecting unit includes a moving magnet and a magnetic sensor. The magnetic sensor is disposed in a space surrounded by the bobbin, whereas the moving magnet is secured to an outer surface of the bobbin. Therefore, even when the moving magnet and a damper member move backward significantly, the magnetic sensor is prevented from being hit by the moving magnet and the damper member.
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公开(公告)号：US12089025B2
公开(公告)日：2024-09-10
申请号：US17886827
申请日：2022-08-12
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita
CPC classification number: H04R9/06 , H04R9/025 , H04R2400/11
Abstract: A detection unit has a fixed magnet, which is part of a magnetic circuit unit, and also has a movable magnet and a magnetic sensor, which are disposed below a cap. A fixed magnetic field component oriented toward a vibration direction acts on the magnetic sensor due to a leakage flux from the magnetic circuit unit. A movable magnetic field component acts from the movable magnet on the magnetic sensor in a direction crossing the fixed magnetic field component. A change in the angle of a detection magnetic field component, which is a combined vector formed from the magnetic field components in two directions, is detected by the magnetic sensor. According to the output in this detection, the operational position of the movable magnet is measured.
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公开(公告)号：US12035115B2
公开(公告)日：2024-07-09
申请号：US17860861
申请日：2022-07-08
Applicant: Alps Alpine Co., LTD
Inventor： Yuji Saito , Hiroki Toita , Hiroyuki Taguchi , Ryosuke Tachi , Tatsuya Mashiko
IPC: H04R3/00
CPC classification number: H04R3/007
Abstract: In a speaker distortion correction device, an input signal passes through a nonlinear-portion correction filter and is input into a linear inverse filter. An output signal from the linear inverse filter is output into a speaker through an amplifier. For the nonlinear-portion correction filter, transfer characteristics (filter coefficients) are set that eliminate distortion due to nonlinear characteristics of the speaker. With a difference, as an error, between vibration of the speaker without distortion relative to an input signal and vibration of a vibration system of the speaker measured by a vibration measurement unit, an adaptive-algorithm execution unit performs an adaptive operation that adaptively updates filter coefficients of the linear inverse filter. When the amplitude of vibration of the vibration system of the speaker measured by the vibration measurement unit deviates from a range that normal relative to an input voltage input into the speaker, a control unit stops the adaptive operation of the adaptive-algorithm execution unit.
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公开(公告)号：US11805367B2
公开(公告)日：2023-10-31
申请号：US17734319
申请日：2022-05-02
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita , Ryosuke Tachi , Ryo Ito
CPC classification number: H04R9/027 , G01R33/072 , H04R1/2803 , H04R3/002 , H04R9/025 , H04R9/046 , H04R9/06 , H04R29/001 , H04R2400/11
Abstract: A vibrating unit includes a diaphragm and a bobbin, and a voice coil is secured to the bobbin. A detecting unit includes a moving magnet and a magnetic sensor. An annular magnet support is secured to a front edge of the bobbin, and the moving magnet is positioned and secured to the magnet support. The magnetic sensor is secured to a drive supporting unit. The moving magnet is secured to the bobbin, with the magnet support therebetween. This facilitates mounting and positioning of the moving magnet.
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