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公开(公告)号：US10949030B2
公开(公告)日：2021-03-16
申请号：US16123757
申请日：2018-09-06
申请人： Apple Inc.
IPC分类号： G06F3/043 , G06F3/041 , G06F1/3234
摘要： Acoustic transducers can be formed form piezoelectric materials including one or more curved (non-linear) segments. The piezoelectric material can be shear poled such that a poling direction of the piezoelectric material can follow the curvature of the piezoelectric material. The piezoelectric material can also have a unidirectional poling direction. In some examples, the piezoelectric material can be a closed ring with a circular or partially circular shape. A shear poling process for a piezoelectric material with curves can include shear poling segments of the piezoelectric material with one or more sets of poling electrodes. The poling electrodes of a respective one of the one or more sets of poling electrodes can be coupled to the same side of the piezoelectric material.
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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：US11144158B2
公开(公告)日：2021-10-12
申请号：US15988991
申请日：2018-05-24
申请人： Apple Inc.
发明人： Marduke Yousefpor , Mohammad Yeke Yazdandoost , Aaron Scott Tucker , Marcus Yip , Ehsan Khajeh , Brian Michael King , Giovanni Gozzini
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：US10606418B2
公开(公告)日：2020-03-31
申请号：US15923967
申请日：2018-03-16
申请人： Apple Inc.
发明人： Marduke Yousefpor , Aaron Scott Tucker , Brian Michael King , Ehsan Khajeh , Marcus Yip , Mohammad Yeke Yazdandoost , Wesley W. Zuber
IPC分类号： G06F3/043 , G06F3/0354 , G06F3/044
摘要： An input device outfitted with one or more ultrasonic transducers can determine the location of one or more objects in contact with the input device. For example, the input device can include one or more transducers disposed in a ring around the circumference of the input device or in an array of rings along the length of the input device. The ultrasonic transducers can be used to detect the position of the one or more touching objects in at least one dimension, for example. In some examples, the one or more ultrasonic transducers can produce directional ultrasonic waves.
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公开(公告)号：US20180284946A1
公开(公告)日：2018-10-04
申请号：US15923967
申请日：2018-03-16
申请人： Apple Inc.
发明人： Marduke Yousefpor , Aaron Scott Tucker , Brian Michael King , Ehsan Khajeh , Marcus Yip , Mohammad Yeke Yazdandoost , Wesley W. Zuber
IPC分类号： G06F3/043 , G06F3/0354
摘要： An input device outfitted with one or more ultrasonic transducers can determine the location of one or more objects in contact with the input device. For example, the input device can include one or more transducers disposed in a ring around the circumference of the input device or in an array of rings along the length of the input device. The ultrasonic transducers can be used to detect the position of the one or more touching objects in at least one dimension, for example. In some examples, the one or more ultrasonic transducers can produce directional ultrasonic waves.
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公开(公告)号：US11347355B2
公开(公告)日：2022-05-31
申请号：US15989063
申请日：2018-05-24
申请人： Apple Inc.
发明人： Ehsan Khajeh , Brian Michael King , Mohammad Yeke Yazdandoost , Marcus Yip , Aaron Scott Tucker , Marduke Yousefpor , Peter Jon Kardassakis , Giovanni Gozzini
IPC分类号： G06F3/044 , G06F3/043 , G06F1/16 , G06F3/0354
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：US11157115B2
公开(公告)日：2021-10-26
申请号：US15476244
申请日：2017-03-31
申请人： Apple Inc.
发明人： Ehsan Khajeh , Brian Michael King , Marcus Yip , Aaron Scott Tucker , Mohammad Yeke Yazdandoost , Marduke Yousefpor , Giovanni Gozzini
摘要： The present disclosure relates to one or more intermediate layers located on a surface of a cover material of an acoustic touch screen. In some examples, the one or more layers can include one or more intermediate layers. The one or more intermediate layers can include a first layer including a plurality of features and a second layer located between the first layer and the cover material. In a touch condition, the touch object can apply a force to the top surface of the acoustic touch sensor. The applied force can create one or more local bends causing the plurality of features to move closer to the cover material and causing one or more surface discontinuities in the cover material. The acoustic waves can undergo reflections (e.g., causing the signal to be attenuated) due to the discontinuities located in the path of the wave propagation.
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公开(公告)号：US10802651B2
公开(公告)日：2020-10-13
申请号：US16256942
申请日：2019-01-24
申请人： Apple Inc.
发明人： Ehsan Khajeh , Aaron Scott Tucker , Brian Michael King , George Ho Yin Mak , Marcus Yip , Mohammad Yeke Yazdandoost
摘要： This relates to system architectures, apparatus and methods for acoustic touch detection (touch sensing) and exemplary applications of the system architectures, apparatus and methods. In some examples, the acoustic touch sensing techniques described herein can be used on a glass surface of a display or touch screen. In some examples, an acoustic touch sensing system can be configured to be insensitive to contact on the device surface by water, and thus acoustic touch sensing can be used for touch sensing in devices that are likely to become wet or fully submerged in water.
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