Ultrasound sensing of proximity and touch

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United States of America Patent

PATENT NO 9811212
SERIAL NO

14630836

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Abstract

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Ultrasound is used to detect the proximity of an object and whether the object touches a body of an electronic device. A transducer may produce ultrasonic waves to air and to the device body simultaneously. The transducer is connected to the body, allowing a vibration of the ultrasonic waves to travel in the body. The vibration characteristics, for example the decay, change in the body when the body is touched. The decay may be analyzed to detect the touch. The transducer produces the ultrasonic waves to the airspace in proximity to the electronic device. Waves returning from the airspace, for example, after reflecting back from a proximate object, are analyzed and proximity or a gesture of the object may be detected.

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Patent Owner(s)

  • MICROSOFT TECHNOLOGY LICENSING, LLC

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jarske, Petri Tampere, FI 19 240

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