公开(公告)号：US09778765B2

公开(公告)日：2017-10-03

申请号：US14339875

申请日：2014-07-24

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Toru Ishii ,  Yasushi Yamamoto ,  Tsutomu Yonemitsu

IPC: G01L1/10 ,  G06F3/038 ,  G01L1/16 ,  H01L41/04 ,  G01B7/00 ,  G06F3/0338 ,  H01L41/113

CPC classification number: G06F3/038 ,  G01B7/003 ,  G01L1/16 ,  G06F3/0338 ,  H01L41/042 ,  H01L41/1134

Abstract: There is provided a displacement sensor which can precisely detect the amount of displacement given by an operator. A touch sensor which is a type of the displacement sensor has a piezoelectric element, a voltage converting unit and a detecting unit. The piezoelectric element instantaneously generates a voltage proportional to a pressing force (the amount of pressing). The voltage converting unit converts the voltage generated by the piezoelectric element, into a voltage proportional to a transition determined based on a predetermined time constant determined by an impedance of a resistor of the voltage converting unit and capacitances of a capacitor and the piezoelectric element, and a pressing force. The detecting unit integrates output voltages of the voltage converting unit, and calculates the pressing force (the amount of pressing) based on an integration value.

公开(公告)号：US20150199061A1

公开(公告)日：2015-07-16

申请号：US14671441

申请日：2015-03-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroaki Kitada ,  Toru Ishii

IPC: G06F3/041

CPC classification number: G06F3/0414 ,  G06F3/0418 ,  G06F3/044 ,  G06F2203/04105

Abstract: A touch input device includes a touch panel, a push amount calculating unit and a touch detection signal generating unit. The touch panel includes piezoelectric and electrostatic sensors. The piezoelectric sensor outputs to the push amount calculating unit a push signal corresponding to a displacement amount obtained by pushing an operation surface. The electrostatic sensor outputs touch signals, corresponding to a touch and a non-touch, to a touch detection signal generating unit. The touch detection signal generating unit outputs to the push amount calculating unit the touch detection signals binarized according to the touch and non-touch state. The push amount calculating unit integrates differences between push signals and a reference potential during a touch state, generates a push amount detection signal and outputs the push amount detection signal. This unit resets a reference potential during a period in which a touch detection signal indicating a non-touch state is inputted.

Abstract translation: 触摸输入装置包括触摸面板，按压量计算单元和触摸检测信号生成单元。 触摸面板包括压电和静电传感器。 压电传感器向按压量计算单元输出与通过按压操作面而获得的位移量相对应的推压信号。 静电传感器将对应于触摸和非触摸的触摸信号输出到触摸检测信号生成单元。 触摸检测信号生成单元向按压量计算单元输出根据触摸和非触摸状态二值化的触摸检测信号。 推动量计算单元在触摸状态期间将推动信号和参考电位之间的差异相加，产生推出量检测信号并输出​​推出量检测信号。 该单元在输入表示非触摸状态的触摸检测信号的期间内复位基准电位。

公开(公告)号：US10120477B2

公开(公告)日：2018-11-06

申请号：US14671441

申请日：2015-03-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroaki Kitada ,  Toru Ishii

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch input device includes a touch panel, a push amount calculating unit and a touch detection signal generating unit. The touch panel includes piezoelectric and electrostatic sensors. The piezoelectric sensor outputs to the push amount calculating unit a push signal corresponding to a displacement amount obtained by pushing an operation surface. The electrostatic sensor outputs touch signals, corresponding to a touch and a non-touch, to a touch detection signal generating unit. The touch detection signal generating unit outputs to the push amount calculating unit the touch detection signals binarized according to the touch and non-touch state. The push amount calculating unit integrates differences between push signals and a reference potential during a touch state, generates a push amount detection signal and outputs the push amount detection signal. This unit resets a reference potential during a period in which a touch detection signal indicating a non-touch state is inputted.