- 专利标题: System and method for acoustic touch and force sensing
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申请号: US15989063申请日: 2018-05-24
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公开(公告)号: US11347355B2公开(公告)日: 2022-05-31
- 发明人: Ehsan Khajeh , Brian Michael King , Mohammad Yeke Yazdandoost , Marcus Yip , Aaron Scott Tucker , Marduke Yousefpor , Peter Jon Kardassakis , Giovanni Gozzini
- 申请人: Apple Inc.
- 申请人地址: US CA Cupertino
- 专利权人: Apple Inc.
- 当前专利权人: Apple Inc.
- 当前专利权人地址: US CA Cupertino
- 代理机构: Kubota & Basol LLP
- 主分类号: G06F3/044
- 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.
公开/授权文献
- US20180341359A1 SYSTEM AND METHOD FOR ACOUSTIC TOUCH AND FORCE SENSING 公开/授权日:2018-11-29