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公开(公告)号：US09865996B2
公开(公告)日：2018-01-09
申请号：US14655988
申请日：2013-12-27
发明人： Tetsuhiro Kodani , Eri Mukai , Takashi Kanemura , Meiten Kou , Susumu Kawato , Satoshi Shimizu
IPC分类号： G01N21/00 , H01T19/04 , G01N21/84 , C08J7/12 , G01N21/896
CPC分类号： H01T19/04 , C08J7/123 , C08J2327/16 , G01N21/8422 , G01N21/896 , G01N2021/8965
摘要： An object of the present invention is to provide a polarized vinylidene fluoride/tetrafluoroethylene copolymer resin film that can significantly reduce, when used as an optical film, the deterioration of the quality of video or still images formed by display elements.The present invention provides a polarized vinylidene fluoride/tetrafluoroethylene copolymer resin film having 2,000 or fewer spot defects per m2, the number of spot defects being measured by a defect measurement method;the method using an surface inspection system in which a CCD camera is placed so as to detect defects at an angle of 45 degrees relative to an LED source, defects of the film are read within a rectangular range of 300 mm in a width direction (the direction perpendicular to the scanning direction), and 150 mm in a machine direction (the scanning direction), while the film is scanned under the camera at a rate of 20 m/min;wherein first, defects having a bright area of 1.5 mm2 or less and a dark area of 1.4 mm2 or less are selected; andnext, in order to remove defects resulting from causes other than a corona treatment contained in these defects, a circumscribed rectangle of defect is set so as to have two sides along the scanning direction, and the number of only defects that have a circumscribed width of 2.88 mm or less, a circumscribed length of 2.3 mm or less, an aspect ratio of −39 to +27, an occupancy area ratio in the circumscribing rectangle of 4,000 to 6,950, and an area ratio of −3,100 to +5,200, is automatically counted as spot defects by the surface inspection system.
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公开(公告)号：US11793083B2
公开(公告)日：2023-10-17
申请号：US16628765
申请日：2018-07-05
发明人： Shinya Bitou , Tetsuhiro Kodani , Saori Sakami , Takashi Kanemura , Tsuyoshi Sekitani , Takafumi Uemura , Shusuke Yoshimoto
IPC分类号： H01L41/193 , G01P15/09 , G01H11/08 , H01L41/113 , H10N30/857 , H10N30/30
CPC分类号： H10N30/857 , G01H11/08 , G01P15/0922 , H10N30/302
摘要： An object of the present invention is to provide a vibration sensor in which the frequency dependence of the output is small. The present invention provides a vibration sensor 1 comprising: a support 2; an organic piezoelectric material 3 deformably disposed in or on the support 2; and an electrode 4 for extracting an electrical signal generated by deformation of the organic piezoelectric material 3, the electrode 4 being formed on the organic piezoelectric material 3, the organic piezoelectric material 3 comprising a copolymer of vinylidene fluoride and one or more monomers copolymerizable with vinylidene fluoride.
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公开(公告)号：US11476402B2
公开(公告)日：2022-10-18
申请号：US16625269
申请日：2018-06-26
IPC分类号： G06F3/041 , H01L41/04 , G01L1/16 , H01L41/113 , H01L41/193
摘要： The present invention relates to a pressure signal detection circuit and a pressure signal detection method in which a pyroelectric signal from a piezoelectric film is suppressed. More specifically, the pressure signal detection circuit receives input of an input signal from a piezoelectric film, differentiates the input signal for signal component analysis of the input signal, outputs the signal analysis value of the input signal based on the differential value, removes offset of the input signal by using the signal component analysis value, integrates the input signal, and outputs a pressure input signal value from which a heat input signal value is removed.
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公开(公告)号：US08883947B2
公开(公告)日：2014-11-11
申请号：US13874285
申请日：2013-04-30
发明人： Takayuki Araki , Tetsuhiro Kodani
IPC分类号： C08F14/18
CPC分类号： C08F114/22 , C07C21/18 , Y10T428/3154 , Y10T428/31544
摘要： A vinylidene fluoride homopolymer represented by the formula (4): CF3-(A1)-I (4) wherein A1 represents a structural unit of vinylidene fluoride homopolymer which includes crystal form I alone or as main component and has a number average degree of polymerization of 5 to 12.
摘要翻译： 由式（4）表示的偏二氟乙烯均聚物：CF 3 - （A1）-I（4）其中A1表示单独的晶形I或主要组分并具有数均聚合度的偏二氟乙烯均聚物的结构单元 为5至12。
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公开(公告)号：US20240237541A1
公开(公告)日：2024-07-11
申请号：US18604797
申请日：2024-03-14
IPC分类号： H10N30/857 , C08L27/16 , C08L27/18 , H10N30/098 , H10N35/01
CPC分类号： H10N30/857 , C08L27/16 , C08L27/18 , H10N30/098 , H10N35/01 , C08L2201/10 , C08L2203/16 , C08L2203/20
摘要： An object is to provide an organic piezoelectric film with a high level of piezoelectricity and a high level of transparency. The organic piezoelectric film of the present disclosure has a total light transmittance of 90% or more, an internal haze value of 0.2%/μm or less per unit film thickness or an internal haze value of 4% or less, and piezoelectric constant d33 of 10 pC/N or more after heating at 110° C. for 10 minutes.
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公开(公告)号：US11424402B2
公开(公告)日：2022-08-23
申请号：US16088664
申请日：2017-03-28
发明人： Tetsuhiro Kodani , Saori Sakami , Hiroyuki Sagami , Takaya Yamada , Shinya Bitou , Eri Mukai , Takashi Kanemura
IPC分类号： H01L41/08 , B32B27/30 , G06F3/041 , H01L41/113
摘要： The present invention addresses the problem of providing a bimorph-type piezoelectric film that is less susceptible to the influence of pyroelectric noise resulting from temperature changes, and that makes it possible to provide a pressure-sensitive sensor or the like. The present invention provides a bimorph-type piezoelectric film comprising a first pyroelectric film having piezoelectric anisotropy in an in-plane direction, and a second pyroelectric film having piezoelectric anisotropy in an in-plane direction, the first pyroelectric film and the second pyroelectric film being disposed in such a manner that their surfaces on which electric charges of the same polarity are generated by a temperature increase are each outward-facing.
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公开(公告)号：US10381546B2
公开(公告)日：2019-08-13
申请号：US15121484
申请日：2015-02-26
发明人： Meiten Kou , Tetsuhiro Kodani , Tomoyuki Gotou , Saori Inaba , Takashi Kanemura
IPC分类号： H01L41/193 , G06F3/041 , H01L41/45 , H01L41/313 , H01L41/113 , H04R17/00
摘要： An object of the present invention is to provide a bimorph piezoelectric film that enables the production of touch panels and the like that are less influenced by pyroelectric noise due to temperature change, and exhibit high transparency.The present invention provides a bimorph piezoelectric film comprising in sequence a first piezoelectric film, a tackifier layer or an adhesive agent layer, and a second piezoelectric film, the first piezoelectric film and the second piezoelectric film being disposed in such a manner that their surfaces on which electric charges of the same polarity are generated by a temperature increase are each outward-facing, the first piezoelectric film and the second piezoelectric film each having a total light transmittance of 90% or more, and a total haze value of 8.0% or less.
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公开(公告)号：US10084292B2
公开(公告)日：2018-09-25
申请号：US15827087
申请日：2017-11-30
发明人： Tetsuhiro Kodani , Eri Mukai , Takashi Kanemura , Meiten Kou , Susumu Kawato , Satoshi Shimizu
IPC分类号： G01N21/00 , H01T19/04 , G01N21/84 , C08J7/12 , G01N21/896
CPC分类号： H01T19/04 , C08J7/123 , C08J2327/16 , G01N21/8422 , G01N21/896 , G01N2021/8965
摘要： An object of the present invention is to provide a polarized vinylidene fluoride/tetrafluoroethylene copolymer resin film that can significantly reduce, when used as an optical film, the deterioration of the quality of video or still images formed by display elements.The present invention provides a polarized vinylidene fluoride/tetrafluoroethylene copolymer resin film having 2,000 or fewer spot defects per m2, the number of spot defects being measured by a defect measurement method; the method using an surface inspection system in which a CCD camera is placed so as to detect defects at an angle of 45 degrees relative to an LED source, defects of the film are read within a rectangular range of 300 mm in a width direction (the direction perpendicular to the scanning direction), and 150 mm in a machine direction (the scanning direction), while the film is scanned under the camera at a rate of 20 m/min; wherein first, defects having a bright area of 1.5 mm2 or less and a dark area of 1.4 mm2 or less are selected; and next, in order to remove defects resulting from causes other than a corona treatment contained in these defects, a circumscribed rectangle of defect is set so as to have two sides along the scanning direction, and the number of only defects that have a circumscribed width of 2.88 mm or less, a circumscribed length of 2.3 mm or less, an aspect ratio of −39 to +27, an occupancy area ratio in the circumscribing rectangle of 4,000 to 6,950, and an area ratio of −3,100 to +5,200, is automatically counted as spot defects by the surface inspection system.
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公开(公告)号：US10745531B2
公开(公告)日：2020-08-18
申请号：US15742971
申请日：2016-07-13
发明人： Takashi Kanemura , Eri Mukai , Takeshi Hazama , Tetsuhiro Kodani , Nobuyuki Komatsu , Hisako Nakamura , Kouji Yokotani , Mayuko Tatemichi , Akio Higaki
IPC分类号： C08J5/18 , H01G4/18 , B32B27/30 , H01G4/33 , H01L41/193 , C08F214/22 , C08F214/26 , H01G4/32 , H01L41/257
摘要： The present invention provides a film having excellent heat resistance and a small difference between the permittivity at low temperatures and the permittivity at high temperatures. The present invention provides a film having a relative permittivity of 8 or more at a frequency of 1 kHz at 30° C., wherein the rate of change is −8 to +8% as calculated from a relative permittivity A at a frequency of 1 kHz at 30° C. and a relative permittivity B at a frequency of 1 kHz at 150° C. according to the following formula: Rate of change(%)=(B−A)/A×100.
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公开(公告)号：US10108287B2
公开(公告)日：2018-10-23
申请号：US14913065
申请日：2014-10-08
发明人： Tetsuhiro Kodani , Eri Mukai , Takashi Kanemura , Meiten Kou
IPC分类号： G06F3/041
摘要： A touch panel hardly affected by pyroelectric noise due to temperature includes a first pyroelectric material and a second pyroelectric material, and is capable of detecting press pressure applied to the first pyroelectric material and/or the second pyroelectric material. The upper surface of the first pyroelectric material and the lower surface of the second pyroelectric material are surfaces on which a positive charge is generated when the temperature increases, and a negative charge is generated when the temperature decreases. The lower surface of the first pyroelectric material and the upper surface of the second pyroelectric material are surfaces on which a negative charge is generated when the temperature increases, and a positive charge is generated when the temperature decreases.
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