Patents by Inventor Itsuo Takeuchi
Itsuo Takeuchi 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: 9688090Abstract: An identification medium can be used in an opening label, clearly show signs of it having been opened, and also have a superior authenticity-confirming function. The identification medium has a structure including, in the following order as seen from the side of observation: an optical function layer that generates a color shift, a separation layer that is partially formed, a printed layer, and an adhesive layer, in which when an adhesive strength between the adhesive layer and an adherend is set to be Xa, an adhesive strength between the adhesive layer and the printed layer is set to be Xb, and an adhesive strength at a portion in which the separation layer is laminated between the optical function layer and the printed layer is set to be Xc, the adhesive strength of each part is set to satisfy Xa>Xb>Xc or Xb>Xa>Xc.Type: GrantFiled: October 2, 2013Date of Patent: June 27, 2017Assignee: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tooru Ida, Shinei Suzuki
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Patent number: 9643444Abstract: An identification medium can be affixed to cloth or leather products by sewing. A cholesteric liquid crystal layer on which an embossed surface for forming a hologram is formed, is sandwiched between a first supporting member and a second supporting member. A mounting region that can be affixed to clothing, etc., by sewing, is formed.Type: GrantFiled: March 14, 2013Date of Patent: May 9, 2017Assignee: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tohru Ida, Seiya Shibuya
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Patent number: 9298036Abstract: In an identification medium, switching of images can be clearly observed, and the medium has a structure produced at low cost. The structure comprises a cholesteric liquid crystal layer 102 in which a hologram is formed, and which selectively reflects circularly polarized light of a specific rotating direction of a specific central wavelength, a cholesteric liquid crystal layer reflecting the entire range of visible light 105 which has reflection characteristics equivalent to a case of reflecting the entire range of visible light and which reflects circularly polarized light of the same rotating direction as the circularly polarized light reflected from the cholesteric liquid crystal layer 102, and a display pattern 106 having a specific content displayed, arranged in this order, as seen from the side of observation.Type: GrantFiled: March 8, 2012Date of Patent: March 29, 2016Assignee: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Seiya Shibuya, Tooru Ida
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Publication number: 20150323898Abstract: An identification medium can be used in an opening label, clearly show signs of it having been opened, and also have a superior authenticity-confirming function. The identification medium has a structure including, in the following order as seen from the side of observation: an optical function layer that generates a color shift, a separation layer that is partially formed, a printed layer, and an adhesive layer, in which when an adhesive strength between the adhesive layer and an adherend is set to be Xa, an adhesive strength between the adhesive layer and the printed layer is set to be Xb, and an adhesive strength at a portion in which the separation layer is laminated between the optical function layer and the printed layer is set to be Xc, the adhesive strength of each part is set to satisfy Xa>Xb>Xc or Xb>Xa>Xc.Type: ApplicationFiled: October 2, 2013Publication date: November 12, 2015Inventors: Hidekazu HOSHINO, Itsuo TAKEUCHI, Tokio SAKAUCHI, Tooru IDA, Shinei SUZUKI
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Publication number: 20150069128Abstract: An optical reading device authenticates an identification medium with cholesteric liquid crystal layer, having a structure in which no movable parts are necessary for switching circular circularly polarized light filter. The optical reading device reads an image from an identification medium having a cholesteric liquid crystal layer having a hologram processed, and an ink printed pattern layer in this order, and the device includes a light emitting part in which a right circularly polarized light filter is arranged in front of an LED, a light emitting part in which a right circularly polarized light filter is arranged in front of an LED, and a controlling part which switches light emission between the light emitting parts.Type: ApplicationFiled: March 11, 2013Publication date: March 12, 2015Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Shinsuke Yoshida, Seiya Shibuya, Tohru Ida, Syuhei Okubo
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Publication number: 20150062504Abstract: An identification medium can be affixed to cloth or leather products by sewing. A cholesteric liquid crystal layer on which an embossed surface for forming a hologram is formed, is sandwiched between a first supporting member and a second supporting member. A mounting region that can be affixed to clothing, etc., by sewing, is formed.Type: ApplicationFiled: March 14, 2013Publication date: March 5, 2015Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tohru Ida, Seiya Shibuya
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Patent number: 8970953Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A fanned by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.Type: GrantFiled: November 12, 2010Date of Patent: March 3, 2015Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Seiya Shibuya, Tohru Ida
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Patent number: 8915437Abstract: A technique detects counterfeit products having appearances similar to authentic products with high accuracy. A cholesteric liquid crystal layer in which hologram is processed and circularly polarized light of primary rotating direction having specific central wavelength can be selectively reflected and a code forming layer in which code printed pattern that is an objective of reading is formed, are arranged in this order seen from a side from which reading is performed. The hologram image that inhibits reading of information of the code while an optical reading device reads it together with the code, and it is formed by the hologram processing.Type: GrantFiled: June 29, 2011Date of Patent: December 23, 2014Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Publication number: 20140160540Abstract: An identification medium cannot be reused when an attempt has been made to remove it from an object by using solvent. A cholesteric liquid crystal layer subjected to a hologram processing is formed while contacting a COP (cycloolefin polymer) layer. When the identification medium is removed using a solvent from a state in which it was adhered to an object by an adhesive layer, the COP layer is melted by the solvent and is damaged. The COP layer is a layer which functions as a substrate of the identification medium, and the identification medium is damaged by contacting with the solvent, as described above, and it is difficult to reuse.Type: ApplicationFiled: February 21, 2012Publication date: June 12, 2014Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Seiya Shibuya, Tooru Ida
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Patent number: 8652592Abstract: A discrimination medium on which printing can be freely performed, which cannot be easily falsified, in which the authenticity can be easily discriminated by unique appearance, and which can be produced at low cost, is provided. A cholesteric liquid crystal layer 10, and a breakable print recording layer are laminated in the discrimination medium. The cholesteric liquid crystal layer 10 has plural light transparent films, which are laminated and are different from each other in refraction index. Therefore, the discrimination medium has unique optical characteristics such that a character, a symbol, a pattern, a figure formed by printing by a thermal printer or the like changes in color depending on the viewing angle. A discrimination method using the above optical characteristics of the discrimination medium is provided.Type: GrantFiled: April 14, 2010Date of Patent: February 18, 2014Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi
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Publication number: 20140022493Abstract: In an identification medium, switching of images can be clearly observed, and the medium has a structure produced at low cost. The structure comprises a cholesteric liquid crystal layer 102 in which a hologram is formed, and which selectively reflects circularly polarized light of a specific rotating direction of a specific central wavelength, a cholesteric liquid crystal layer reflecting the entire range of visible light 105 which has reflection characteristics equivalent to a case of reflecting the entire range of visible light and which reflects circularly polarized light of the same rotating direction as the circularly polarized light reflected from the cholesteric liquid crystal layer 102, and a display pattern 106 having a specific content displayed, arranged in this order, as seen from the side of observation.Type: ApplicationFiled: March 8, 2012Publication date: January 23, 2014Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Seiya Shibuya, Tooru Ida
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Publication number: 20130105076Abstract: A method for production of an identification medium, includes a forming step in which a code printed pattern is formed by printing; and a joining step in which the code printed pattern and a cholesteric liquid crystal layer are joined; wherein the identification medium includes, in order, seen from an observing side: a cholesteric liquid crystal layer, in which a hologram is processed and right circularly polarized light ?/4 plate and a linearly polarizing filter from the observing side, in which left circularly polarized light selectively penetrates toward the cholesteric liquid crystal layer when natural light enters from the opposite side to the cholesteric liquid crystal layer side; and a code printed pattern, in which a two-dimensional codes is formed.Type: ApplicationFiled: June 29, 2011Publication date: May 2, 2013Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Publication number: 20130099000Abstract: A technique detects counterfeit products having appearances similar to authentic products with high accuracy. A cholesteric liquid crystal layer in which hologram is processed and circularly polarized light of primary rotating direction having specific central wavelength can be selectively reflected and a code forming layer in which code printed pattern that is an objective of reading is formed, are arranged in this order seen from a side from which reading is performed. The hologram image that inhibits reading of information of the code while an optical reading device reads it together with the code, and it is formed by the hologram processing.Type: ApplicationFiled: June 29, 2011Publication date: April 25, 2013Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Patent number: 8322753Abstract: An identification medium is to be observed via a linearly polarizing filter and includes a first liquid crystal layer that changes the wavelength of light according to the rotational angle of the linearly polarizing filter, a cholesteric liquid crystal layer, and a light absorbing layer that is provided below the cholesteric liquid crystal layer.Type: GrantFiled: October 18, 2007Date of Patent: December 4, 2012Assignees: NHK Spring Co., Ltd., Nippon Oil CorporationInventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Suzushi Nishimura, Gorou Suzaki
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Patent number: 8297522Abstract: Provided is a multilayer reflector about which a complicated step is not required when the molecular alignment of a retardation film is partially relaxed to form a latent image of authentication information, and about which the latent image is not made visible by the generation of unevenness in the surface. A multilayer reflector 1 has a retardation film 10 in which the phase difference ?nd1 to an observation wavelength ? is set to be m×?/4??/16??nd1?m×?/4+?/16 wherein m is a positive odd number, and a metallic reflector 11 laminated on the rear face side of this retardation film 10, wherein an authentication region 10a where predetermined authentication information is beforehand formed in the retardation film 10 is formed to give a phase difference ?nd2 set to be n×?/4??/8 ??nd2?n×?/4+?/8 wherein n is 0 or a positive even number provided that n<m, and further a light diffusing layer 12 is formed on the front face side of the retardation film 10.Type: GrantFiled: June 21, 2006Date of Patent: October 30, 2012Assignees: Nitto Denko Corporation, NHK Spring Co., Ltd.Inventors: Seiji Umemoto, Kazuhito Kouno, Kazumasa Shibata, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Patent number: 8279394Abstract: An object of the present invention is to provide a discrimination medium which has high discrimination ability, and which is more difficult to counterfeit than conventional discrimination mediums. A discrimination medium comprises: a cholesteric liquid crystal layer; and a liquid crystal layer acting as a half-wave plate and provided on the cholesteric liquid crystal layer in a predetermined pattern.Type: GrantFiled: March 30, 2007Date of Patent: October 2, 2012Assignees: NHK Spring Co., Ltd., Nippon Oil CorporationInventors: Hidekazu Hoshino, Itsuo Takeuchi, Suzushi Nishimura, Gorou Suzaki
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Publication number: 20120236292Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A formed by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.Type: ApplicationFiled: November 12, 2010Publication date: September 20, 2012Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Seiya Shibuya, Tohru Ida
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Patent number: 8231953Abstract: A transparent plastic container which is transparent, allows good design and can be used for an anticounterfeit system that determines authenticity by visual check with the use of polarization property. A transparent plastic sheet of a polystyrene-based resin having a total light transmission of 85% or higher and a haze of 7% or less is subjected to vacuum, pneumatic or vacuum/pneumatic forming at a sheet temperature ranging from a glass transition temperature plus 50 degrees C. to a glass transition temperature plus 130 degrees C., thereby obtaining a transparent plastic container having a planar portion with a strain amount of 150 nm or less.Type: GrantFiled: July 11, 2007Date of Patent: July 31, 2012Assignees: NHK Spring Co., Ltd., RP Topla LimitedInventors: Itsuo Takeuchi, Tokio Sakauchi, Mutsumi Sasaki, Tomoyoshi Sakamoto, Masahiro Arai, Rie Maejima
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Patent number: 8168080Abstract: An identifying medium comprises a nematic liquid crystal layer for forming a latent image with gradation, and the nematic liquid crystal layer has a thickness distribution corresponding to the gradation.Type: GrantFiled: August 9, 2007Date of Patent: May 1, 2012Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Shinya Nasubida
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Patent number: 8158239Abstract: An identification medium provided with a laminated structure comprises laminated layers of a magnetically controllable layer, in which magnetic microcapsules are dispersed, and a color shifting layer.Type: GrantFiled: December 19, 2006Date of Patent: April 17, 2012Assignee: NHK Spring Co., Ltd.Inventors: Itsuo Takeuchi, Hidekazu Hoshino, Shinya Nasubida