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11.发明申请公开(公告)号：US20200333914A1
公开(公告)日：2020-10-22
申请号：US16390911
申请日：2019-04-22
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Ala'a AL-OKAILY , Brian Michael KING , George Ho Yin MAK , Supratik DATTA
IPC: G06F3/043
Abstract: Acoustic touch sensing system architectures and methods for acoustic touch sensing can be used to detect a position of an object touching a surface. Acoustic touch sensing can utilize transducers (e.g., piezoelectric) to simultaneously transmit ultrasonic waves along a surface and through a thickness of a material. The location of the object 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. In some examples, techniques such as isolation and absorption of acoustic energy can be used to mitigate acoustic energy reflected by portions of the electronic device and interfere with the acoustic touch sensing operation.
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公开(公告)号：US20190095045A1
公开(公告)日：2019-03-28
申请号：US16123757
申请日：2018-09-06
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Aaron Scott TUCKER , Brian Michael KING , Marcus YIP
IPC: G06F3/043
Abstract: 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：US20180341347A1
公开(公告)日：2018-11-29
申请号：US15988991
申请日：2018-05-24
Applicant: Apple Inc.
Inventor： Marduke YOUSEFPOR , Mohammad YEKE YAZDANDOOST , Aaron Scott TUCKER , Marcus YIP , Ehsan KHAJEH , Brian Michael KING , Giovanni GOZZINI
Abstract: 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：US20220276733A1
公开(公告)日：2022-09-01
申请号：US17664398
申请日：2022-05-20
Applicant: Apple Inc.
Inventor： Mohammad YEKE YAZDANDOOST , Giovanni GOZZINI , Brian Michael KING , Marcus YIP , Ehsan KHAJEH , Aaron Scott TUCKER
IPC: G06F3/044 , G06F3/043 , G06F1/16 , G06F3/0354
Abstract: 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：US20220206630A1
公开(公告)日：2022-06-30
申请号：US17139598
申请日：2020-12-31
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , George Ho Yin MAK , Brian Michael KING , Karan JAIN
Abstract: Improving the accuracy of ultrasonic touch sensing via the reduction, elimination and/or rejection of parasitic ultrasonic reflections caused by unintended touches is disclosed. The adverse effects of these parasitic reflections can be mitigated by disrupting the symmetry of the true reflections (from the intended touch) and the parasitic reflections (from unintended touches) so that the true touch can be disambiguated from unintended touches. Identification of the true touch can then enable accurate touch localization.
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Patent Agency Ranking
公开(公告)号：US20190243047A1
公开(公告)日：2019-08-08
申请号：US16268886
申请日：2019-02-06
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Aaron Scott TUCKER , Brian Michael KING , Marcus YIP
CPC classification number: G02B5/3041 , G06F3/0436
Abstract: 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：US20160209982A1
公开(公告)日：2016-07-21
申请号：US15083102
申请日：2016-03-28
Applicant: Apple Inc.
Inventor： Jeffrey Traer BERNSTEIN , David AMM , Omar S. LEUNG , Christopher Tenzin MULLENS , Brian Michael KING , Brian R. LAND , Reese T. CUTLER
IPC: G06F3/041 , G06F3/0486 , G06F3/044
CPC classification number: G06F3/0416 , G06F3/044 , G06F3/04817 , G06F3/04845 , G06F3/0486 , G06F2203/04101
Abstract: Improved capacitive touch and hover sensing with a sensor array is provided. An AC ground shield positioned behind the sensor array and stimulated with signals of the same waveform as the signals driving the sensor array may concentrate the electric field extending from the sensor array and enhance hover sensing capability. The hover position and/or height of an object that is nearby, but not directly above, a touch surface of the sensor array, e.g., in the border area at the end of a touch screen, may be determined using capacitive measurements of sensors near the end of the sensor array by fitting the measurements to a model. Other improvements relate to the joint operation of touch and hover sensing, such as determining when and how to perform touch sensing, hover sensing, both touch and hover sensing, or neither.
Abstract translation: 提供了改进的电容式触摸和悬停感测与传感器阵列。 定位在传感器阵列后面并用与驱动传感器阵列的信号相同波形的信号刺激的AC接地屏蔽可以集中从传感器阵列延伸的电场并增强悬停感测能力。 传感器阵列的触摸表面（例如在触摸屏末端的边界区域）附近但不是直接在上方的物体的悬停位置和/或高度可以使用接近的传感器的电容测量来确定 传感器阵列的末端通过将测量值拟合到模型中。 其他改进涉及触摸和悬停感测的联合操作，例如确定何时以及如何执行触摸感测，悬停感测，触摸和悬停检测，或两者皆不一致。
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公开(公告)号：US20150169114A1
公开(公告)日：2015-06-18
申请号：US14631564
申请日：2015-02-25
Applicant: Apple Inc.
Inventor： Brian Michael KING , Omar S. LEUNG , Paul G. PUSKARICH , Jeffrey Traer BERNSTEIN , Andrea MUCIGNAT , Avi E. CIEPLINSKI , Muhammad Umar CHOUDRY , Praveen R. SUBRAMANI , Marc J. PICHE , David AMM , Duncan Robert KERR
CPC classification number: G06F3/0416 , G06F3/0418 , G06F3/044 , G06F2203/04101 , G06F2203/04106 , G06F2203/04108 , G06F2203/04111
Abstract: Compensation for sensors in a touch and hover sensing device is disclosed. Compensation can be for sensor resistance and/or sensor sensitivity variation that can adversely affect touch and hover measurements at the sensors. To compensate for sensor resistance, the device can gang adjacent sensors together so as to reduce the overall resistance of the sensors. In addition or alternatively, the device can drive the sensors with voltages from multiple directions so as to reduce the effects of the sensors' resistance. To compensate for sensor sensitivity variation (generally at issue for hover measurements), the device can apply a gain factor to the measurements, where the gain factor is a function of the sensor location, so as to reduce the sensitivity variation at different sensor locations on the device.
Abstract translation: 公开了触摸和悬停感测装置中传感器的补偿。 补偿可用于传感器电阻和/或传感器灵敏度变化，可能会对传感器的触摸和悬停测量产生不利影响。 为了补偿传感器电阻，器件可以将相邻的传感器组合在一起，以减少传感器的整体电阻。 另外或替代地，该装置可以用来自多个方向的电压来驱动传感器，以便减少传感器电阻的影响。 为了补偿传感器灵敏度变化（通常对于悬停测量通常是一个问题），器件可以对测量应用增益因子，其中增益因子是传感器位置的函数，以便减少不同传感器位置处的灵敏度变化 装置。
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公开(公告)号：US20200042130A1
公开(公告)日：2020-02-06
申请号：US16056403
申请日：2018-08-06
Applicant: Apple Inc.
Inventor： Anuranjini PRAGADA , George Ho Yin MAK , Ehsan KHAJEH , Brian Michael KING , Maegan K. SPENCER
Abstract: Acoustic touch sensing systems can include a mechanically integrated structure including multiple acoustic transducers. For example, an annular structure including one or more piezoelectric segments can be fabricated and then coupled to a front crystal/cover glass. A single structure can simplify the structural integration of the device, can provide a mechanically reliable and stable structure for improved structural integrity of the system, and can provide for improved water sealing for a waterproof or water resistant device. The piezoelectric material in the annular structure can be shear poled such that a poling direction of the piezoelectric material can follow the curvature of the annular piezoelectric structure.
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公开(公告)号：US20190235656A1
公开(公告)日：2019-08-01
申请号：US16256942
申请日：2019-01-24
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Aaron Scott TUCKER , Brian Michael KING , George Ho Yin MAK , Marcus YIP , Mohammad YEKE YAZDANDOOST
Abstract: 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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