公开(公告)号：US20240393906A1

公开(公告)日：2024-11-28

申请号：US18790099

申请日：2024-07-31

Applicant: Infineon Technologies AG

Inventor： Costin BATRINU ,  Emanuel STOICESCU ,  Gheorghe-Iulian CHIVU ,  Victor-Valentin MOCANU

IPC: G06F3/043 ,  G06F3/041

Abstract: An ultrasonic touch sensor includes a touch structure including a touch surface configured to receive a touch, a signal generator configured to generate an excitation, a capacitive ultrasonic transmitter configured to transmit an ultrasonic transmit wave toward the touch structure based on the excitation signal while the touch surface is submerged under the water, a capacitive ultrasonic receiver configured to receive an ultrasonic reflected wave produced by a reflection of the ultrasonic transmit wave at the touch structure while the touch surface is submerged under the water and generate a measurement signal representative of the ultrasonic reflected wave, and a measurement circuit configured to perform a comparison based on the measurement signal and a threshold, and determine whether a no-touch event or a touch event has occurred at the touch surface while the touch surface is submerged under the water based on whether the measurement signal satisfies the threshold.

公开(公告)号：US20240184406A1

公开(公告)日：2024-06-06

申请号：US18469019

申请日：2023-09-18

Applicant: Infineon Technologies AG

Inventor： Costin BATRINU ,  Emanuel STOICESCU ,  Gheorghe-Iulian CHIVU ,  Victor-Valentin MOCANU

IPC: G06F3/043 ,  G06F3/041

CPC classification number: G06F3/043 ,  G06F3/0416

Abstract: An ultrasonic touch sensor includes a touch structure including a touch surface configured to receive a touch, a signal generator configured to generate an excitation, a capacitive ultrasonic transmitter configured to transmit an ultrasonic transmit wave toward the touch structure based on the excitation signal while the touch surface is submerged under the water, a capacitive ultrasonic receiver configured to receive an ultrasonic reflected wave produced by a reflection of the ultrasonic transmit wave at the touch structure while the touch surface is submerged under the water and generate a measurement signal representative of the ultrasonic reflected wave, and a measurement circuit configured to perform a comparison based on the measurement signal and a threshold, and determine whether a no-touch event or a touch event has occurred at the touch surface while the touch surface is submerged under the water based on whether the measurement signal satisfies the threshold.