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公开(公告)号：US11231816B2
公开(公告)日：2022-01-25
申请号：US17219758
申请日：2021-03-31
申请人： Apple Inc.
发明人： Ehsan Khajeh , Brian Michael King
摘要： An ultrasonic touch sensing system that uses both compressional and shear waves for touch and water detection is disclosed. When no touch or water is present, less shear and compressional wave energy is absorbed, so both shear and compressional wave reflections do not have significant amplitude decreases. When a finger is in contact with the sensing plate, both shear and compressional wave energy is absorbed, so both shear and compressional wave reflections have significant amplitude decreases. When water is in contact with the sensing plate, compressional energy is absorbed but little or no shear wave energy is absorbed, so while compressional wave reflections have significant amplitude decreases, shear wave reflections do not. From these amplitudes, a determination can be made as to whether no touch is present on the sensing plate, whether a touch is present on the sensing plate, or whether water is present on the sensing plate.
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公开(公告)号：US20210271843A1
公开(公告)日：2021-09-02
申请号：US17326202
申请日：2021-05-20
申请人： Apple Inc.
发明人： Mohammad Yeke Yazdandoost , Giovanni Gozzini , Brian Michael King , Marcus Yip , Marduke Yousefpor , Ehsan Khajeh , Aaron Tucker , Henry H. Yang
IPC分类号： G06K9/00 , A61B5/1172 , A61B8/00
摘要： An acoustic imaging system includes multiple transducers disposed to circumscribe a portion of substrate. An acoustic imaging system also includes a controller and an image resolver. The transducers convert electrical signals into mechanical energy and/or mechanical energy into electrical signals. The controller is adapted to apply an electrical signal to the transducers which, in response, induce a mechanical wave, such as a surface wave, into the circumscribed portion. The controller is also adapted to receive electrical signals from the transducers. The image resolver uses the electrical signals received by the controller in order to construct an image of an object in physical contact with the substrate.
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公开(公告)号：US10198610B1
公开(公告)日：2019-02-05
申请号：US15275010
申请日：2016-09-23
申请人： Apple Inc.
发明人： Marduke Yousefpor , Mohammad Yeke Yazdandoost , Brian Michael King , Marcus Yip , Ehsan Khajeh , Aaron Tucker
摘要： An acoustic imaging system includes multiple acoustic transducers disposed to circumscribe a portion of imaging surface. An acoustic imaging system also includes a controller and an image resolver. The acoustic transducers convert electrical signals into mechanical energy and/or mechanical energy into electrical signals. The controller is adapted to apply an electrical signal to the acoustic transducers which, in response, induce a mechanical wave, such as a surface wave, into the circumscribed portion. The controller is also adapted to receive electrical signals from the acoustic transducers. The image resolver uses the electrical signals received by the controller in order to construct an image of an object in physical contact with the imaging surface.
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公开(公告)号：US11861115B2
公开(公告)日：2024-01-02
申请号：US17664398
申请日：2022-05-20
申请人： Apple Inc.
发明人： Mohammad Yeke Yazdandoost , Giovanni Gozzini , Brian Michael King , Marcus Yip , Ehsan Khajeh , Aaron Scott Tucker
IPC分类号： G06F3/044 , G06F3/043 , G06F1/16 , G06F3/0354
CPC分类号： G06F3/044 , G06F1/1605 , G06F1/1656 , G06F3/03545 , G06F3/0436 , G06F2203/04105
摘要： Acoustic touch and/or force sensing system architectures and methods for acoustic touch and/or force sensing can be used to detect a position of an object touching a surface and an amount of force applied to the surface by the object. The position and/or an applied force can be determined using time-of-flight (TOF) techniques, for example. Acoustic touch sensing can utilize transducers (e.g., piezoelectric) to simultaneously transmit ultrasonic waves along a surface and through a thickness of a deformable material. The location of the object and the applied force can be determined based on the amount of time elapsing between the transmission of the waves and receipt of the reflected waves. In some examples, an acoustic touch sensing system can be insensitive to water contact on the device surface, and thus acoustic touch sensing can be used for touch sensing in devices that may become wet or fully submerged in water.
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公开(公告)号：US20220317271A1
公开(公告)日：2022-10-06
申请号：US17709270
申请日：2022-03-30
申请人： Apple Inc.
发明人： Gordon S. Franza , Gregory T. Minteer , Mohammad Yeke Yazdandoost , Dale Setlak , Marcus C. Yip , Ehsan Khajeh , Aaron S. Tucker , Andrew W. Joyce , Brian M. King , Giovanni Gozzini , Jason S. Griesbach
摘要： An acoustic imaging system coupled to an acoustic imaging medium to define an imaging surface. The acoustic imaging system includes an array of piezoelectric acoustic transducers formed at least in part from a thin-film piezoelectric material, such as PVDF. The array is coupled to the acoustic imaging medium opposite the imaging surface and formed using a thin-film manufacturing process over an application-specific integrated circuit that, in turn, is configured to leverage the array of piezoelectric actuators to generate an image of an object at least partially wetting to the imaging surface.
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公开(公告)号：US11422113B2
公开(公告)日：2022-08-23
申请号：US16917779
申请日：2020-06-30
申请人： Apple Inc.
摘要： An ultrasonic touch sensing system that uses both compressional and shear waves for touch and water detection is disclosed. When no touch or water is present, less shear and compressional wave energy is absorbed, so both shear and compressional wave reflections do not have significant amplitude decreases. When a finger is in contact with the sensing plate, both shear and compressional wave energy is absorbed, so both shear and compressional wave reflections have significant amplitude decreases. When water is in contact with the sensing plate, compressional energy is absorbed but little or no shear wave energy is absorbed, so while compressional wave reflections have significant amplitude decreases, shear wave reflections do not. From these amplitudes, a determination can be made as to whether no touch is present on the sensing plate, whether a touch is present on the sensing plate, or whether water is present on the sensing plate.
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公开(公告)号：US11366552B2
公开(公告)日：2022-06-21
申请号：US16268886
申请日：2019-02-06
申请人： Apple Inc.
摘要： A polarizer disposed between a transducer and a surface in which acoustic waves propagate can be used to filter out certain types of acoustic energy. For example, the polarizer can be used with a shear-polarized transducer to pass shear waves and filter out compressional waves that may interact with water, thereby improving water rejection. In some examples, the polarizer can include one or more layers of piezoelectric material with a poling direction different than (e.g., orthogonal to) the poling direction of the transducer. Energy of compressional waves may be extracted by one or more external electric circuits. In some examples, the polarizer can be a magneto-elastic polarizer. In some examples, the polarizer can be a mechanical polarizer.
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公开(公告)号：US11334196B2
公开(公告)日：2022-05-17
申请号：US16523958
申请日：2019-07-26
申请人： Apple Inc.
摘要： Acoustic touch and/or force sensing system architectures and methods for acoustic touch and/or force sensing can be used to detect a position of an object touching a surface and an amount of force applied to the surface by the object. The position and/or an applied force can be determined using time-of-flight (TOF) techniques, for example. Acoustic touch sensing can utilize transducers (e.g., piezoelectric) to simultaneously transmit ultrasonic waves along a surface and through a thickness of a deformable material. The location of the object and the applied force can be determined based on the amount of time elapsing between the transmission of the waves and receipt of the reflected waves. In some examples, an acoustic touch sensing system can be insensitive to water contact on the device surface, and thus acoustic touch sensing can be used for touch sensing in devices that may become wet or fully submerged in water.
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公开(公告)号：US10325136B1
公开(公告)日：2019-06-18
申请号：US15274891
申请日：2016-09-23
申请人： Apple Inc.
发明人： Mohammad Yeke Yazdandoost , Marduke Yousefpor , Brian Michael King , Ehsan Khajeh , Marcus Yip , Giovanni Gozzini , Aaron Tucker
摘要： An acoustic imaging system includes multiple acoustic transducers disposed to circumscribe a portion of imaging surface. An acoustic imaging system also includes a controller and an image resolver. The acoustic transducers convert electrical signals into mechanical energy and/or mechanical energy into electrical signals. The controller is adapted to apply an electrical signal to the acoustic transducers which, in response, induce a mechanical wave, such as a surface wave, into the circumscribed portion. The controller is also adapted to receive electrical signals from the acoustic transducers. The image resolver uses the electrical signals received by the controller in order to construct an image of an object in physical contact with the imaging surface.
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公开(公告)号：US12067196B2
公开(公告)日：2024-08-20
申请号：US18106226
申请日：2023-02-06
申请人： Apple Inc.
发明人： Marcus C. Yip , Brian M. King , Jason S. Griesbach , Ehsan Khajeh , Aaron S. Tucker , Andrew W. Joyce , Giovanni Gozzini , Mohammad Yeke Yazdandoost , Gordon S. Franza
CPC分类号： G06F3/0436 , G06F3/04166
摘要： An acoustic imaging system coupled to an acoustic medium to define an imaging surface. The acoustic imaging system includes an array of piezoelectric acoustic transducers formed at least in part from a thin-film piezoelectric material, such as PVDF. The array is coupled to the acoustic medium opposite the imaging surface and formed using a thin-film manufacturing process over an application-specific integrated circuit that, in turn, is configured to leverage on or more beamforming scan operations to drive the array of piezoelectric actuators to generate an image of an object at least partially wetting to the imaging surface.
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