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公开(公告)号：US20210064177A1
公开(公告)日：2021-03-04
申请号：US16997899
申请日：2020-08-19
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , George Ho Yin MAK , Marcus YIP , Brian Michael KING , Aaron Scott TUCKER , Jason S. GRIESBACH , Paul X. WANG , Alex Joseph LEHMANN
Abstract: Ultrasonic force detection systems and methods can be based on propagation of ultrasonic waves in a user's body (e.g., in a user's digit). An amount of force can be determined using time-of-flight (TOF) techniques of one or more ultrasonic waves propagating in the user's body. In some examples, an electronic device including a transducer can be coupled to a digit, and can transmit ultrasonic waves into the digit. As the wave propagates through the thickness of the digit, a reflection of at least a portion of the transmitted wave can occur due to the bone and/or due to reaching the opposite side of the digit (e.g., finger pad). One or more reflections can be measured to determine the amount of force.
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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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公开(公告)号：US20210404991A1
公开(公告)日：2021-12-30
申请号：US16917779
申请日：2020-06-30
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Brian Michael KING , George Ho Yin MAK , Marcus YIP , Giovanni GOZZINI
Abstract: 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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Patent Agency Ranking
5.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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6.发明公开公开(公告)号：US20230351797A1
公开(公告)日：2023-11-02
申请号：US18331867
申请日：2023-06-08
Applicant: Apple Inc.
Inventor： Daniel J. HIEMSTRA , George Ho Yin MAK , Ehsan KHAJEH , Hoishun LI
CPC classification number: G06V40/1306 , G06F3/0412 , G06F3/0436 , G10K11/02
Abstract: Improving the accuracy of ultrasonic touch sensing and fingerprint imaging using acoustic impedance matching is disclosed. Acoustic impedance mismatches between an ultrasonic transducer array and a sensing plate can be reduced to maximize energy transfer and minimize parasitic reflections. A reduction in acoustic impedance mismatches can be accomplished using (i) a composite epoxy having a higher acoustic impedance than epoxy alone, (ii) one or more matching layers having an acoustic impedance that is approximately the geometric mean of the acoustic impedance of the sensing plate and the acoustic impedance of the transducer array, (iii) pores or perforations in the sensing plate, or (iv) geometric structures formed in the sensing plate. In addition, parasitic reflections can be suppressed using an absorbent layer.
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公开(公告)号：US20220366719A1
公开(公告)日：2022-11-17
申请号：US17660308
申请日：2022-04-22
Applicant: Apple Inc.
Inventor： Daniel J. HIEMSTRA , George Ho Yin MAK , Ehsan KHAJEH , Camille L. EVERHART
Abstract: Improving the accuracy of ultrasonic touch sensing and fingerprint imaging using acoustic impedance matching is disclosed. Acoustic impedance mismatches between an ultrasonic transducer array and a sensing plate can be reduced to maximize energy transfer and minimize parasitic reflections. A reduction in acoustic impedance mismatches can be accomplished using (i) a composite epoxy having a higher acoustic impedance than epoxy alone, (ii) one or more matching layers having an acoustic impedance that is approximately the geometric mean of the acoustic impedance of the sensing plate and the acoustic impedance of the transducer array, (iii) pores or perforations in the sensing plate, or (iv) geometric structures formed in the sensing plate. In addition, parasitic reflections can be suppressed using an absorbent layer.
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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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公开(公告)号：US20200103981A1
公开(公告)日：2020-04-02
申请号：US16147384
申请日：2018-09-28
Applicant: Apple Inc.
Inventor： Yung-Yu HSU , Mingjing HA , Zhiyuan SUN , Paul S. DRZAIC , Anuranjini PRAGADA , George Ho Yin MAK , Antonio Y. LAYON HALUN , Wesley W. ZUBER
IPC: G06F3/02 , H03K17/96 , H01H13/704 , H01H13/7065
Abstract: Touch sensitive mechanical keyboards and processes for detecting touch events and key depressions on the touch sensitive mechanical keyboard are provided. The touch sensitive mechanical keyboard can include a set of individually depressible mechanical keys having a touch sensitive surface. A touch sensor layer can be disposed on top of a key mechanism and flexible interconnections provided between key segments of the touch sensor layer can allow for depression of the key mechanism of individual keys. In some examples, the flexible interconnections can be formed by patterning a spring-like structure into the touch sensor layer. In some examples, the touch sensor layer can be transparent or include openings to allow a backlight to shine through. In some examples, addressable LED backlighting with buckling interconnects can also be provided to illuminate keycaps of the mechanical keyboard.
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