Patents by Inventor Tetsuhiro Kodani
Tetsuhiro Kodani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11793083Abstract: 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.Type: GrantFiled: July 5, 2018Date of Patent: October 17, 2023Assignees: DAIKIN INDUSTRIES, LTD., OSAKA UNIVERSITYInventors: Shinya Bitou, Tetsuhiro Kodani, Saori Sakami, Takashi Kanemura, Tsuyoshi Sekitani, Takafumi Uemura, Shusuke Yoshimoto
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Publication number: 20230069063Abstract: An object is to provide a fluorine-containing polymer film. The object can be achieved by a fluorine-containing polymer film having a thermal shrinkage of 0.4% or less after being heated at 90° C. for 1 hour, and having a relative permittivity of 3 to 50 at 25° C. at 1000 Hz, or a fluorine-containing polymer film having a crystallinity of 50% or more and an elongation at break of 400% or more.Type: ApplicationFiled: October 20, 2022Publication date: March 2, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tetsuhiro KODANI, Saori SAKAMI, Shinya BITOU, Masaharu ARIMOTO, Takashi KANEMURA
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Patent number: 11476402Abstract: 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.Type: GrantFiled: June 26, 2018Date of Patent: October 18, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Hyunsik Kim, Takashi Kanemura, Tetsuhiro Kodani, Kwan-Young Han
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Patent number: 11424402Abstract: 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.Type: GrantFiled: March 28, 2017Date of Patent: August 23, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tetsuhiro Kodani, Saori Sakami, Hiroyuki Sagami, Takaya Yamada, Shinya Bitou, Eri Mukai, Takashi Kanemura
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Publication number: 20210384411Abstract: An object is to provide a piezoelectric film with good piezoelectricity. This object can be achieved by a piezoelectric film comprising a vinylidene fluoride/tetrafluoroethylene copolymer film and having a residual polarization amount of 40 mC/m2 or more.Type: ApplicationFiled: October 16, 2019Publication date: December 9, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tetsuhiro KODANI, Saori SAKAMI, Shinya BITOU, Takashi KANEMURA, Akinari SUGIYAMA
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Publication number: 20200303619Abstract: 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.Type: ApplicationFiled: March 28, 2017Publication date: September 24, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tetsuhiro KODANI, Saori SAKAMI, Hiroyuki SAGAMI, Takaya YAMADA, Shinya BITOU, Eri MUKAI, Takashi KANEMURA
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Patent number: 10745531Abstract: 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.Type: GrantFiled: July 13, 2016Date of Patent: August 18, 2020Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takashi Kanemura, Eri Mukai, Takeshi Hazama, Tetsuhiro Kodani, Nobuyuki Komatsu, Hisako Nakamura, Kouji Yokotani, Mayuko Tatemichi, Akio Higaki
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Publication number: 20200220066Abstract: 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. With this structure, the present invention reduces the influence on the thermal reaction as compared with prior art, while enabling pressure signal detection at a higher speed.Type: ApplicationFiled: June 26, 2018Publication date: July 9, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hyunsik KIM, Takashi KANEMURA, Tetsuhiro KODANI, Kwan-Young HAN
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Publication number: 20200144481Abstract: 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.Type: ApplicationFiled: July 5, 2018Publication date: May 7, 2020Applicants: DAIKIN INDUSTRIES, LTD., OSAKA UNIVERSITYInventors: Shinya BITOU, Tetsuhiro KODANI, Saori SAKAMI, Takashi KANEMURA, Tsuyoshi SEKITANI, Takafumi UEMURA, Shusuke YOSHIMOTO
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Patent number: 10381546Abstract: 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.Type: GrantFiled: February 26, 2015Date of Patent: August 13, 2019Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Meiten Kou, Tetsuhiro Kodani, Tomoyuki Gotou, Saori Inaba, Takashi Kanemura
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Publication number: 20190109274Abstract: A piezoelectric wire of the present invention includes a conductive wire 11 and a polymer piezoelectric layer 12 that coats the conductive wire 11. The polymer piezoelectric layer 12 contains a ?-phase polyvinylidene fluoride-based copolymer, and the conductive wire 11 has a wire diameter of 1.0 mm or less. The ?-phase polyvinylidene fluoride-based copolymer is preferably at least one selected from a vinylidene fluoride-trifluoroethylene copolymer and a vinylidene fluoride-tetrafluoroethylene copolymer.Type: ApplicationFiled: March 27, 2017Publication date: April 11, 2019Inventors: Ken OGASAHARA, Satoshi SHIMIZU, Susumu KAWATO, Takashi KANEMURA, Tetsuhiro KODANI
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Patent number: 10108287Abstract: 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.Type: GrantFiled: October 8, 2014Date of Patent: October 23, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tetsuhiro Kodani, Eri Mukai, Takashi Kanemura, Meiten Kou
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Patent number: 10084292Abstract: 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.Type: GrantFiled: November 30, 2017Date of Patent: September 25, 2018Assignees: DAIKIN INDUSTRIES, LTD., TOHO KASEI CO., LTD.Inventors: Tetsuhiro Kodani, Eri Mukai, Takashi Kanemura, Meiten Kou, Susumu Kawato, Satoshi Shimizu
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Publication number: 20180223059Abstract: 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.Type: ApplicationFiled: July 13, 2016Publication date: August 9, 2018Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takashi KANEMURA, Eri MUKAI, Takeshi HAZAMA, Tetsuhiro KODANI, Nobuyuki KOMATSU, Hisako NAKAMURA, Kouji YOKOTANI, Mayuko TATEMICHI, Akio HIGAKI
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Publication number: 20180097338Abstract: 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.Type: ApplicationFiled: November 30, 2017Publication date: April 5, 2018Applicants: DAIKIN INDUSTRIES, LTD., TOHO KASEI CO., LTD.Inventors: Tetsuhiro KODANI, Eri MUKAI, Takashi KANEMURA, Meiten KOU, Susumu KAWATO, Satoshi SHIMIZU
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Patent number: 9865996Abstract: 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.Type: GrantFiled: December 27, 2013Date of Patent: January 9, 2018Assignees: DAIKIN INDUSTRIES, LTD., TOHO KASEI CO., LTD.Inventors: Tetsuhiro Kodani, Eri Mukai, Takashi Kanemura, Meiten Kou, Susumu Kawato, Satoshi Shimizu
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Publication number: 20170033276Abstract: 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.Type: ApplicationFiled: February 26, 2015Publication date: February 2, 2017Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Meiten KOU, Tetsuhiro KODANI, Tomoyuki GOTOU, Saori INABA, Takashi KANEMURA
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Publication number: 20160264742Abstract: A primary object of the present invention is to provide a film exhibiting high electrical insulation properties and excellent withstand voltage properties and a method for producing the film. As a means for achieving the object, the present invention provides a vinylidene fluoride-based polymer film in which the 99% voltage failure resistance value in a Weibull plot is 300 V/?m or more.Type: ApplicationFiled: October 8, 2014Publication date: September 15, 2016Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Meiten KOU, Takashi KANEMURA, Eri MUKAI, Tetsuhiro KODANI
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Publication number: 20160202823Abstract: 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.Type: ApplicationFiled: October 8, 2014Publication date: July 14, 2016Inventors: Tetsuhiro KODANI, Eri MUKAI, Takashi KANEMURA, Meiten KOU
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Publication number: 20150368413Abstract: The present invention aims to provide a film having a high dielectric constant and a low dissipation factor. The high dielectric film of the present invention includes a vinylidene fluoride/tetrafluoroethylene copolymer (A) with a mole ratio (vinylidene fluoride)/(tetrafluoroethylene) of 95/5 to 80/20. The film includes an ?-crystal structure and a ?-crystal structure. The ratio of the ?-crystal structure is 50% or more.Type: ApplicationFiled: October 16, 2013Publication date: December 24, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mayuko TATEMICHI, Miharu OTA, Kouji YOKOTANI, Nobuyuki KOMATSU, Hisako NAKAMURA, Fumiko SHIGENAI, Takeshi HAZAMA, Masakazu KINOSHITA, Meiten KOH, Takuji ISHIKAWA, Takashi IGUCHI, Kazunobu UCHIDA, Tomoyuki FUKATANI, Takahiro KITAHARA, Tetsuhiro KODANI