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

IPC: G06F3/043 ,  H01Q1/00 ,  H01Q1/52 ,  H01Q7/00

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.