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    PRESSING SENSOR AND ELECTRONIC DEVICE
    1.
    发明申请
    PRESSING SENSOR AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20180045586A1

    公开(公告)日：2018-02-15

    申请号：US15794165

    申请日：2017-10-26

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： HIDEKI KAWAMURA

    IPC: G01L1/16 ,  H01L41/113 ,  H03M1/12 ,  H01L41/053

    CPC classification number: G01L1/16 ,  G06F3/0414 ,  H01L41/042 ,  H01L41/053 ,  H01L41/1132 ,  H01L41/193 ,  H03M1/12

    Abstract: A pressing sensor that includes a pressing portion deformed by pressing, a piezoelectric sensor that generates a detection voltage based on the deformation amount, and a first current-voltage conversion circuit that converts a charge/discharge current for a capacitance of the piezoelectric sensor into a voltage signal and outputs the voltage signal. Moreover, a deformation amount detector obtains an integrated value of an output voltage and detects the integrated value as the deformation amount of the pressing portion. A minute vibration sensor detects presence or absence of minute vibration of the pressing portion according to presence or absence of a minute fluctuation state of the output voltage and an integration reset processor resets the integrated value in response to absence of the minute vibration.

    PIEZOELECTRIC SENSOR
    4.
    发明申请
    PIEZOELECTRIC SENSOR 审中-公开
    压电传感器

    公开(公告)号：US20160305832A1

    公开(公告)日：2016-10-20

    申请号：US15196723

    申请日：2016-06-29

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： HIDEKI KAWAMURA ,  Hiroyuki Nakaji ,  Yoshihiro Yamaguchi ,  Jun Endo ,  Masato Saito

    IPC: G01L1/16 ,  H01L41/313 ,  H01L41/193 ,  H01L41/053 ,  H01L41/113

    CPC classification number: G01L1/16 ,  H01L41/053 ,  H01L41/1132 ,  H01L41/1138 ,  H01L41/193 ,  H01L41/313

    Abstract: A piezoelectric sensor that includes a piezoelectric film, first and second adhesive layers, first and second plate electrodes and a glass plate. The piezoelectric film includes first and second principal surfaces. The first adhesive layer attaches the first plate electrode to the first principal surface. The second adhesive layer attaches the second plate electrode to the second principal surface. The second plate electrode is attached to the glass plate such that the second adhesive layer and the second plate electrode are interposed between the piezoelectric film and the glass plate. The glass plate is distorted by being pushed. The second adhesive layer is thicker than the first adhesive layer.

    Abstract translation: 一种压电传感器，包括压电膜，第一和第二粘合剂层，第一和第二板电极和玻璃板。 压电膜包括第一和第二主表面。 第一粘合剂层将第一板电极附接到第一主表面。 第二粘合剂层将第二板电极附接到第二主表面。 第二平板电极附接到玻璃板，使得第二粘合层和第二板电极介于压电膜和玻璃板之间。 玻璃板被推压变形。 第二粘合剂层比第一粘合剂层厚。

    DISPLACEMENT SENSOR, PUSH-IN AMOUNT DETECTION SENSOR, AND TOUCH TYPE DEVICE
    5.
    发明申请
    DISPLACEMENT SENSOR, PUSH-IN AMOUNT DETECTION SENSOR, AND TOUCH TYPE DEVICE 审中-公开
    位移传感器，推入式检测传感器和触摸式设备

    公开(公告)号：US20150292963A1

    公开(公告)日：2015-10-15

    申请号：US14751676

    申请日：2015-06-26

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： HIDEKI KAWAMURA ,  Masamichi Ando

    IPC: G01L1/16 ,  G06F3/044 ,  G09G3/36 ,  G06F3/041

    CPC classification number: G01L1/16 ,  G06F3/0412 ,  G06F3/0414 ,  G06F3/044 ,  G06F2203/04101 ,  G06F2203/04103 ,  G06F2203/04105 ,  G06F2203/04111 ,  G09G3/36 ,  H01L41/1132 ,  H01L41/193

    Abstract: A push-in amount detection sensor includes a piezoelectric film, an electrode-formed protective film, and an adhesive layer. The electrode-formed protective film adheres to the piezoelectric film with the adhesive layer interposed therebetween such that an electrode is located on the side of the piezoelectric film. Relative permittivity ∈a of the adhesive layer is higher than relative permittivity ∈p of the piezoelectric film. Preferably an electrostatic capacitance per unit area of the adhesive layer is higher than an electrostatic capacitance per unit area of the piezoelectric film, more preferably the electrostatic capacitance per unit area of the adhesive layer is substantially double the electrostatic capacitance per unit area of the piezoelectric film. The thickness of the adhesive layer is set within a predetermined thickness range.

    Abstract translation: 推入量检测传感器包括压电膜，电极形成的保护膜和粘合剂层。 电极形成的保护膜粘附到压电膜上，其中粘合剂层介于其间，使得电极位于压电膜的侧面。 粘合剂层的相对介电常数εa高于压电薄膜的相对介电常数εp。 优选地，粘合剂层的每单位面积的静电电容高于压电膜的每单位面积的静电电容，更优选地，粘合剂层的每单位面积的静电电容基本上是压电膜的每单位面积的静电电容的两倍 。 粘合剂层的厚度设定在预定的厚度范围内。

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