Patents by Inventor Yoshihito Maeno
Yoshihito Maeno 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: 10474099Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: November 14, 2016Date of Patent: November 12, 2019Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Publication number: 20170060087Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: November 14, 2016Publication date: March 2, 2017Inventors: Minoru AZAKAMI, Koji ETO, Hiroyuki OHTAKI, Yoshihito MAENO, Sakurako HATORI
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Patent number: 9529324Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: February 25, 2014Date of Patent: December 27, 2016Assignee: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Patent number: 9376571Abstract: The present invention is to provide a colorant dispersion liquid which is able to form a high-luminance coating film having better heat resistance compared to the case of using conventional dyes. Disclosed is a colorant dispersion liquid containing (A) a colorant, (B) a dispersant, and (C) a solvent, wherein the colorant (A) contains a color material represented by the following general formula (I) and a xanthene-based dye; a solubility of the color material in the solvent (C) and that of the xanthene-based dye in the solvent (C) are each 0.2 (g/100 g solvent) or less at 23° C.; and the color material and the xanthene-based dye are dispersed in the solvent (C) by the dispersant (B): (The symbols in the formula are as described in the Description.Type: GrantFiled: February 4, 2014Date of Patent: June 28, 2016Assignees: DAI NIPPON PRINTING CO., LTD., DNP FINE CHEMICALS CO., LTD.Inventors: Masato Okada, Daisuke Endo, Michihiro Ogura, Hiroaki Segawa, Tomoki Murata, Yoshihito Maeno, Hiroshi Oshima
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Publication number: 20150368473Abstract: The present invention is to provide a colorant dispersion liquid which is able to form a high-luminance coating film having better heat resistance compared to the case of using conventional dyes. Disclosed is a colorant dispersion liquid containing (A) a colorant, (B) a dispersant, and (C) a solvent, wherein the colorant (A) contains a color material represented by the following general formula (I) and a xanthene-based dye; a solubility of the color material in the solvent (C) and that of the xanthene-based dye in the solvent (C) are each 0.2 (g/100 g solvent) or less at 23° C.; and the color material and the xanthene-based dye are dispersed in the solvent (C) by the dispersant (B): (The symbols in the formula are as described in the Description.Type: ApplicationFiled: February 4, 2014Publication date: December 24, 2015Inventors: Masato OKADA, Daisuke ENDO, Michihiro OGURA, Hiroaki SEGAWA, Tomoki MURATA, Yoshihito MAENO, Hiroshi OSHIMA
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Patent number: 8852828Abstract: This invention provides a volume hologram photosensitive composition, which can realize a hologram having an excellent brightness and, at the same time, having excellent heat resistance and mechanical strength, and a photosensitive medium for volume hologram recording using the volume hologram photosensitive composition. The volume hologram photosensitive composition comprises at least a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the initiator, and a binder resin. The binder resin comprises a heat curing resin, and optionally a thermoplastic resin, and the thermoplastic resin is contained in an amount of 0 to 25% by weight based on the total solid content of the photosensitive composition.Type: GrantFiled: July 5, 2006Date of Patent: October 7, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Yoshihito Maeno, Hiroyuki Ohtaki
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Publication number: 20140240805Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: February 25, 2014Publication date: August 28, 2014Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru AZAKAMI, Koji ETO, Hiroyuki OHTAKI, Yoshihito MAENO, Sakurako HATORI
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Patent number: 8697314Abstract: A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: February 28, 2008Date of Patent: April 15, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Patent number: 8431289Abstract: The volume hologram recording photosensitive composition provided by the present invention contains at least a fluorine-contained photoreactive compound represented by the following formula (1): R1—R3—(CF2)n-R4—R2 wherein R1 and R2 are photoreactive groups which can be bonded to each other by photoreaction, and each of R3 and R4 is independently a single bond or a bivalent hydrocarbon group having 1 to 5 carbon atoms, and n is an integer of 1 or more. This volume hologram recording photosensitive composition is used to form a recording section of a recording medium, and then the section is exposed to light, whereby a bright volume hologram can be obtained.Type: GrantFiled: June 29, 2010Date of Patent: April 30, 2013Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hiroyuki Otaki, Toshio Yoshihara, Yoshihito Maeno
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Patent number: 8298452Abstract: A negative type resist composition for a color filter including (A) a pigment dispersant, (B) a pigment, (C) an alkaline-soluble resin, (D) a polyfunctional monomer, (E) a photo initiator and (F) a solvent.Type: GrantFiled: August 20, 2008Date of Patent: October 30, 2012Assignee: Dai Nippon Printing Co., Ltd.Inventors: Michihiro Ogura, Yoshihito Maeno, Hiroaki Segawa
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Patent number: 7824822Abstract: The volume hologram recording photosensitive composition provided by the present invention contains at least a fluorine-contained photoreactive compound represented by the following formula (1): R1—R3—(CF2)n-R4—R2 wherein R1 and R2 are photoreactive groups which can be bonded to each other by photoreaction, and each of R3 and R4 is independently a single bond or a bivalent hydrocarbon group having 1 to 5 carbon atoms, and n is an integer of 1 or more. This volume hologram recording photosensitive composition is used to form a recording section of a recording medium, and then the section is exposed to light, whereby a bright volume hologram can be obtained.Type: GrantFiled: July 8, 2003Date of Patent: November 2, 2010Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hiroyuki Otaki, Toshio Yoshihara, Yoshihito Maeno
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Publication number: 20100266936Abstract: The volume hologram recording photosensitive composition provided by the present invention contains at least a fluorine-contained photoreactive compound represented by the following formula (1): R1—R3—(CF2)n-R4—R2 wherein R1 and R2 are photoreactive groups which can be bonded to each other by photoreaction, and each of R3 and R4 is independently a single bond or a bivalent hydrocarbon group having 1 to 5 carbon atoms, and n is an integer of 1 or more. This volume hologram recording photosensitive composition is used to form a recording section of a recording medium, and then the section is exposed to light, whereby a bright volume hologram can be obtained.Type: ApplicationFiled: June 29, 2010Publication date: October 21, 2010Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Hiroyuki OTAKI, Toshio YOSHIHARA, Yoshihito MAENO
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Publication number: 20100104952Abstract: A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: February 28, 2008Publication date: April 29, 2010Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Publication number: 20090108241Abstract: A negative type resist composition for a color filter comprising including (A) a pigment dispersant, (B) a pigment, (C) an alkaline-soluble resin, (D) a polyfunctional monomer, (E) a photo initiator and (F) a solvent.Type: ApplicationFiled: August 20, 2008Publication date: April 30, 2009Inventors: Michihiro OGURA, Yoshihito MAENO, Hiroaki SEGAWA
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Publication number: 20070148556Abstract: A volume hologram recording material having a composition that is adjusted in accordance with a recording wavelength in a visible region set individually and specifically, and is excellent in sensitivity or hologram recording performance. A photosensitive composition for volume hologram recording having a photopolymerizable compound, a photopolymerization initiator and a sensitizing dye, and a maximum absorption wavelength of the sensitizing dye deviates by 14 nm or more from a predetermined volume hologram recording wavelength set in a visible region and the composition itself has absorption at the volume hologram recording wavelength.Type: ApplicationFiled: December 21, 2004Publication date: June 28, 2007Inventors: Yoshihito Maeno, Hiroyuki Ohtaki, Toshio Yoshihara, Junichiro Ihara, Fumio Matsui
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Publication number: 20070009807Abstract: This invention provides a volume hologram photosensitive composition, which can realize a hologram having an excellent brightness and, at the same time, having excellent heat resistance and mechanical strength, and a photosensitive medium for volume hologram recording using the volume hologram photosensitive composition. The volume hologram photosensitive composition comprises at least a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the initiator, and a binder resin. The binder resin comprises a heat curing resin, and optionally a thermoplastic resin, and the thermoplastic resin is contained in an amount of 0 to 25% by weight based on the total solid content of the photosensitive composition.Type: ApplicationFiled: July 5, 2006Publication date: January 11, 2007Applicant: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Yoshihito Maeno, Hiroyuki Ohtaki
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Publication number: 20040137334Abstract: The volume hologram recording photosensitive composition provided by the present invention contains at least a fluorine-contained photoreactive compound represented by the following formula (1): R1—R3—(CF2)n-R4-R2 wherein R1 and R2 are photoreactive groups which can be bonded to each other by photoreaction, and each of R3 and R4 is independently a single bond or a bivalent hydrocarbon group having 1 to 5 carbon atoms, and n is an integer of 1 or more. This volume hologram recording photosensitive composition is used to form a recording section of a recording medium, and then the section is exposed to light, whereby a bright volume hologram can be obtained.Type: ApplicationFiled: July 8, 2003Publication date: July 15, 2004Inventors: Hiroyuki Otaki, Toshio Yoshihara, Yoshihito Maeno