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公开(公告)号：US20230022492A1
公开(公告)日：2023-01-26
申请号：US17816717
申请日：2022-08-01
Applicant: Apple Inc.
Inventor： Mohammad YEKE YAZDANDOOST , Brian M. KING , Ehsan KHAJEH , Giovanni GOZZINI , Marcus C. YIP , Mansour KERAMAT , Vahid MAJIDZADEH BAFAR , Aaron S. TUCKER
IPC: G06F3/043 , G06F1/3231 , G06F1/16 , G06F1/3234 , G06F3/041 , H01Q1/00 , H01Q1/52 , H01Q7/00
Abstract: Acoustic touch detection (touch sensing) system architectures and methods can be used to detect an object touching a surface. Position of an object touching a surface can be determined using time-of-flight (TOF) bounding box techniques, or acoustic image reconstruction techniques. Acoustic touch sensing can utilize transducers, such as piezoelectric transducers, to transmit ultrasonic waves along a surface and/or through the thickness of an electronic device. Location of the object can be determined, for example, based on the amount of time elapsing between the transmission of the wave and the detection of the reflected wave. An object in contact with the surface can interact with the transmitted wave causing attenuation, redirection and/or reflection of at least a portion of the transmitted wave. Portions of the transmitted wave energy after interaction with the object can be measured to determine the touch location of the object on the surface of the device.
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公开(公告)号：US20180341359A1
公开(公告)日：2018-11-29
申请号：US15989063
申请日：2018-05-24
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Brian Michael KING , Mohammad YEKE YAZDANDOOST , Marcus YIP , Aaron Scott TUCKER , Marduke YOUSEFPOR , Peter Jon KARDASSAKIS , Giovanni GOZZINI , Supratik DATTA , Asif HUSSAIN
IPC: G06F3/041 , G06F1/16 , G06F3/044 , 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：US20180284947A1
公开(公告)日：2018-10-04
申请号：US15476244
申请日：2017-03-31
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Brian Michael KING , Marcus YIP , Aaron Scott TUCKER , Mohammad YEKE YAZDANDOOST , Marduke YOUSEFPOR , Giovanni GOZZINI
Abstract: 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：US20230195265A1
公开(公告)日：2023-06-22
申请号：US17954248
申请日：2022-09-27
Applicant: Apple Inc.
Inventor： Qiliang XU , Ming YU , Xiaonan WEN , Ehsan KHAJEH , Jason S. GRIESBACH , Brian M. KING
IPC: G06F3/043
CPC classification number: G06F3/043
Abstract: Input devices can employ ultrasonic touch sensing capabilities that allow user inputs to be detected through conductive materials, such as metal enclosures. The ultrasonic touch sensing can include generation of ultrasound signals with a piezoelectric layer. The ultrasound signals can be reflected when a user or other object is in contact with a housing, and the reflected signal can be detected by the same piezoelectric layer that produced the ultrasound signal. Such a piezoelectric layer can include a piezoelectric polymer, such as polyvinylidene fluoride (PVDF). An array of electrodes distributed on opposing sides of the use of electric layer can be operated to generate ultrasound signals and detect reflected signals. Such an input device can be operated in conjunction with a conductive (e.g., metallic) housing, conform to a variety of shapes, and be compact and lightweight
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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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Patent Agency Ranking
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：US20180032211A1
公开(公告)日：2018-02-01
申请号：US15663588
申请日：2017-07-28
Applicant: Apple Inc.
Inventor： Brian Michael KING , Mohammad YEKE YAZDANDOOST , Ehsan KHAJEH , Aaron Scott TUCKER , Giovanni GOZZINI , Marcus YIP , Marduke YOUSEFPOR , Digvijay JADHAV , Indranil SEN , Mohit NARANG , Yi JIANG , Vahid MAJIDZADEH BAFAR , Mansour KERAMAT , Hao XU
CPC classification number: G06F3/0436 , G06F1/1694 , G06F1/1698 , G06F1/3231 , G06F1/325 , G06F1/3262 , G06F3/0418 , G06F3/0433 , G06F2200/1637 , G06F2203/04104 , G06F2203/04106 , H01Q1/002 , H01Q1/52 , H01Q7/005 , Y02D10/173
Abstract: Acoustic touch detection (touch sensing) system architectures and methods can be used to detect an object touching a surface. Position of an object touching a surface can be determined using time-of-flight (TOF) bounding box techniques, or acoustic image reconstruction techniques, for example. Acoustic touch sensing can utilize transducers, such as piezoelectric transducers, to transmit ultrasonic waves along a surface and/or through the thickness of an electronic device. Location of the object can be determined, for example, based on the amount of time elapsing between the transmission of the wave and the detection of the reflected wave. An object in contact with the surface can interact with the transmitted wave causing attenuation, redirection and/or reflection of at least a portion of the transmitted wave. Portions of the transmitted wave energy after interaction with the object can be measured to determine the touch location of the object on the surface of the device.
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公开(公告)号：US20240126394A1
公开(公告)日：2024-04-18
申请号：US18458977
申请日：2023-08-30
Applicant: Apple Inc.
Inventor： Supratik DATTA , John K. FRANKOVICH , Ehsan KHAJEH , Omid MAHDAVIPOUR
Abstract: Examples of the disclosure are directed to the use of one or more piezoelectric (PE) transducers for detecting one or more touches on a surface. In some embodiments, the one or more PE transducers can complement a capacitive touch sensor array and provide a confirmation that a touch has in fact occurred, and can provide a secondary determination of touch location. In some examples, the one or more PE transducers can be formed on, or as part of, a flex circuit that is adhered to a housing or other structure to which the touch surface is affixed. The flex circuit can be formed as a strip upon which the one or more PE transducers are attached, and can be shaped and sized (optionally with a fold to create a tail for electrical connections) to adhere to an inner or outer surface of the housing.
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公开(公告)号：US20220397483A1
公开(公告)日：2022-12-15
申请号：US17664832
申请日：2022-05-24
Applicant: Apple Inc.
Inventor： Michael K. MCCORD , Ehsan KHAJEH , Brian M. KING , Tong CHEN , Yaser SHANJANI
IPC: G01M11/02
Abstract: Acoustic optical integrity detection system architectures and methods can be used to detect optical integrity of an optical component by detecting a discontinuity on and/or in the optical component (e.g., on the optical surface and/or within the bulk of the optical component). In some examples, integrity detection can be used to ensure safety compliance of an optical system, optionally including a laser. Acoustic integrity detection can utilize transducers (e.g., piezoelectric transducers) to transmit ultrasonic waves along an optical surface and/or through the thickness of an optical component. A discontinuity of the optical surface can interact with the transmitted wave causing attenuation, redirection and/or reflection of at least a portion of the transmitted wave. Portions of the transmitted wave energy after interaction with the discontinuity can be measured to determine discontinuity location, type, and/or severity.
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公开(公告)号：US20210405809A1
公开(公告)日：2021-12-30
申请号：US17219758
申请日：2021-03-31
Applicant: Apple Inc.
Inventor： Ehsan KHAJEH , Brian Michael KING
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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