公开(公告)号：US20220413648A1

公开(公告)日：2022-12-29

申请号：US17929838

申请日：2022-09-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki TACHIBANA ,  Hiroaki KITADA

IPC: G06F3/041

Abstract: An operation detection sensor is provided and an electronic apparatus is provided that detect an operation on an operation target regardless of a waveform state of an output voltage of a sensor. The operation detection sensor includes a piezoelectric element, a voltage detection circuit that detects a voltage generated in the piezoelectric element, and a calculation unit that obtains a reference voltage by averaging detection voltages of the voltage detection circuit, and detects an operation on an operation target when a state in which a voltage difference between the reference voltage and the detection voltage is a predetermined value or more continues for a predetermined time or more.

公开(公告)号：US20220365630A1

公开(公告)日：2022-11-17

申请号：US17816551

申请日：2022-08-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masamichi ANDO ,  Takashi KIHARA ,  Hidekazu KANO ,  Yuuki TACHIBANA

IPC: G06F3/044 ,  G06F3/041 ,  G01L1/16

Abstract: A pressing sensor is provided that generates an output voltage of a first polarity by deforming with an operation plate when a part of a user's body touches the operation plate, and generates the output voltage of a second polarity by deforming with the operation plate when the part of the user's body is moved away from the operation plate. Moreover, a calculation unit calculates an electrical parameter integral value by time-integrating an electrical parameter that changes with the output voltage generated by the pressing sensor. The electrical parameter has a third polarity when the output voltage has the first polarity and has a fourth polarity when the output voltage has the second polarity. The calculation unit calculates a subtraction electrical parameter integral value obtained by subtracting a predetermined value having the third polarity per unit time from the electrical parameter integral value.

公开(公告)号：US20220244114A1

公开(公告)日：2022-08-04

申请号：US17660106

申请日：2022-04-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki TACHIBANA ,  Shiori NAGAMORI

IPC: G01L1/16 ,  G01L25/00 ,  G09F9/30

Abstract: A bending sensor is provided that includes a piezoelectric element disposed on a bendable substrate; a voltage detection circuit that detects a voltage generated in the piezoelectric element; and an arithmetic unit that calculates an integrated value by integrating the voltage detected by the voltage detection circuit and associates the integrated value with a bent state of the substrate. Moreover, the arithmetic unit calculates in advance a corrected integrated value obtained by correcting a maximum value of the integrated value with a decrease value resulting from a stress relieving effect, associates the corrected integrated value with a first bent state of the substrate, and normalizes a calculated integrated value based on the corrected integrated value.