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公开(公告)号：US11472742B2
公开(公告)日：2022-10-18
申请号：US17115100
申请日：2020-12-08
申请人： TDK CORPORATION
发明人： Toshihiro Iguchi
摘要： A dielectric composition includes a main phase and a Ca—Si—P—O segregation phase. The main phase includes a main component expressed by ABO3. “A” includes at least one selected from calcium and strontium. “B” includes at least one selected from zirconium, titanium, hafnium, and manganese. The Ca—Si—P—O segregation phase includes at least calcium, silicon, and phosphorus.
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公开(公告)号：US11176918B2
公开(公告)日：2021-11-16
申请号：US16463400
申请日：2017-11-29
发明人： Hiroshi Koike , Yutaro Sugamata , Seiichiro Iida , Kunio Hiyama , Suguru Sasaki , Hidekazu Kodama
IPC分类号： G10H3/14 , H01L41/047 , H01L41/193 , H01G7/02
摘要： Provision of a piezoelectric element which uses a lightweight and flexible electret material and an electrode layer which is also lightweight, has high conductivity and good flexibility to easily receive electrical signals from an electret, and has good durability. Additionally, provision of a musical instrument provided with such a piezoelectric element. A piezoelectric element comprising an electrode layer (B) on at least one surface of an electret material (A) having pores inside, wherein a porosity of the electret material (A) is 20 to 80%, the electrode layer (B) contains 20 to 70 mass % of a carbon fine particle, and a thickness of the electrode layer (B) is 2 to 100 μm.
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公开(公告)号：US10958191B2
公开(公告)日：2021-03-23
申请号：US16277584
申请日：2019-02-15
摘要： An electrostatic motor includes a cylindrical rotor and a stator. Electrodes are disposed on an inside cylindrical surface of the stator. Electrets and/or electrically conductive electrodes are disposed on the cylindrical rotor and a dielectric fluid fills space between the rotor and the stator to prevent discharge of the electrets. A mask is used to charge portions of an electret cylinder or other curved surface.
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公开(公告)号：US10672564B2
公开(公告)日：2020-06-02
申请号：US16139084
申请日：2018-09-23
申请人： Kirk W. Rosener
发明人： Kirk W. Rosener
摘要： The Electret Energy Storage System (EESS) achieves an advancement in the energy storage field due to high energy/power level densities integrated into a long term energy storage solution. Combining the high density energy storage solution of the EESS with traditional battery storage technologies reduces the overall energy storage three dimensional footprint when compared to battery only footprints. This combined EESS/battery long term energy storage provides a solution in providing energy from renewable energy systems when the presence of the wind or sun are not available when compared to traditional battery only storage solutions.
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公开(公告)号：US10522295B2
公开(公告)日：2019-12-31
申请号：US15839176
申请日：2017-12-12
发明人： William S. H. Cheung
摘要： A system is disclosed for restoring a surface field potential of an electret material. An oscillator generates an oscillating output, and a power amplifier amplifies the oscillating output. A step-up transformer generates a high voltage alternating current output from the amplified oscillating output, and a polarity controller generates one of a positive pulsating output and a negative pulsating output from the high voltage alternating current output.
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公开(公告)号：US10213716B2
公开(公告)日：2019-02-26
申请号：US15301902
申请日：2015-03-31
申请人： TOYOBO CO., LTD.
IPC分类号： B01D39/16 , B03C3/28 , H01G7/02 , B01D46/00 , D06M15/256 , D06M101/20 , D06M101/18
摘要： [Problems]An object of the present invention is to provide an electret with an initial increased electrostatic charge quantity and suppressed attenuation of electrostatic charge to liquid particles.[Means for solving]The electret is obtained by depositing polytetrafluoroethylene having a melting point of 35° C. or higher and 320° C. or lower on a carrier and imparting an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene.
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公开(公告)号：US20190057816A1
公开(公告)日：2019-02-21
申请号：US16074807
申请日：2017-02-03
摘要： The present invention provides an electret sheet that retains high piezoelectricity under high-temperature condition. The electret sheet of the invention is characterized by including a charged porous sheet, in which the electret sheet has a volume resistivity of 1.0×1015 Ω⋅cm or more at 25° C. and a dielectric breakdown voltage of 7 kV or more at 25° C. The electret sheet preferably having a volume resistivity of 1.0×1014 Ω⋅cm or more at 37° C. and a dielectric breakdown voltage of 7 kV or more at 37° C. retains excellent piezoelectricity even after being left under a high-temperature atmosphere over a long period.
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公开(公告)号：US10181381B2
公开(公告)日：2019-01-15
申请号：US15240655
申请日：2016-08-18
IPC分类号： H01G7/04 , H01G5/017 , H01G7/02 , H01G4/20 , H01L41/193
摘要： A variable capacitor device that includes a dielectric layer comprising a shape-memory polymer, a first metal plate and a second metal plate, wherein the dielectric layer is sandwiched between the first and the second metal plates. The shape-memory polymer has a first thickness at a first temperature under a first external compressive load, a second thickness at a second temperature under a second external compressive load, wherein the first thickness is greater than the second thickness, the second temperature is greater than the first temperature, and the second external compressive load is greater than the first external compressive load. The shape memory polymer having the second thickness is configured to convert to the shape-memory polymer having the first thickness when sequentially subjected to the first external compressive load and the second temperature.
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9.发明授权公开(公告)号：US10152152B2
公开(公告)日：2018-12-11
申请号：US15516119
申请日：2015-09-29
发明人： Takehito Kozasa , Manabu Yoshida
IPC分类号： G08B6/00 , G06F3/041 , H01G7/02 , H03K17/955 , H03K17/975 , G01P15/08 , G06F3/01 , G06F3/0354 , H01L21/31 , H01L29/51 , H01L29/78 , H01L29/82 , H01L29/84 , H01L41/113 , B81B3/00 , G06F3/044 , G01L1/22
摘要： Provided are an element applicable to a high-precision, high-sensitivity pressure detecting sensor and switch, a manufacturing method for the element; and a sensor, an electronic circuit, and an input device that include the element. The electret element of the present invention has a semiconductor sandwiched between a pair of electrodes, and an electret film disposed at a location opposite to the semiconductor via a gap. The electret element of the present invention may be structured so that the semiconductor contacts with the electret film, or so as to have micro-sized gaps therebetween. The electret film is semi-permanently kept in a positively or negatively charged state. By having a structure in which the electret film can contact with or approach the semiconductor, an amount of electric currents flowing between the pair of electrodes can be controlled.
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10.发明申请公开(公告)号：US20180159446A1
公开(公告)日：2018-06-07
申请号：US15550875
申请日：2016-02-13
申请人： Guenter BECKMANN
CPC分类号： H02N1/08 , B81B3/0018 , B81B2201/03 , H01G7/02 , H01H13/28 , H02N2/181
摘要： An electrostatic microgenerator having electret films which are arranged above one another in a double layer and each have a metal layer arranged on one side thereof as an electrode. The films are embedded in a hermetically sealed casing in a loosely wound manner. Applying pressure to a first desired pressure surface, which is provided on the outside parallel to the capacitor plates formed in this manner, makes it possible to generate an electrical voltage by changing the distance between the capacitor plates.
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