Patents by Inventor Keiichi Kanazawa
Keiichi Kanazawa 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: 8685872Abstract: A low softening point glass composition, which is substantially free from lead, bismuth and antimony and comprises oxides of vanadium, phosphorous, tellurium and iron, a softening point of the composition being 380° C. or lower.Type: GrantFiled: May 22, 2013Date of Patent: April 1, 2014Assignee: Hitachi Chemical Co., Ltd.Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Keiichi Kanazawa, Shinji Yamada, Satoru Amou, Hiroki Yamamoto, Takuya Aoyagi
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Publication number: 20130333748Abstract: A low softening point glass composition, which is substantially free from lead, bismuth and antimony and comprises oxides of vanadium, phosphorous, tellurium and iron, a softening point of the composition being 380° C. or lower.Type: ApplicationFiled: May 22, 2013Publication date: December 19, 2013Inventors: Takashi NAITO, Shinichi TACHIZONO, Kei YOSHIMURA, Yuji HASHIBA, Keiichi KANAZAWA, Shinji YAMADA, Satoru AMOU, Hiroki YAMAMOTO, Takuya AOYAGI
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Patent number: 8470723Abstract: A low softening point glass composition, which is substantially free from lead, bismuth and antimony and comprises oxides of vanadium, phosphorous, tellurium and iron, a softening point of the composition being 380° C. or lower.Type: GrantFiled: January 14, 2010Date of Patent: June 25, 2013Assignee: Hitachi Powdered Metals Co., Ltd.Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Keiichi Kanazawa, Shinji Yamada, Satoru Amou, Hiroki Yamamoto, Takuya Aoyagi
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Patent number: 8022000Abstract: A bonding glass containing V2O5: 25 to 50 wt %, TeO2: 20 to 40 wt % and BaO: 5 to 30 wt %, and not containing lead.Type: GrantFiled: January 5, 2007Date of Patent: September 20, 2011Assignee: Hitachi Displays Ltd.Inventors: Yuichi Sawai, Osamu Shiono, Takashi Namekawa, Hiroyuki Akata, Takashi Naito, Keiichi Kanazawa, Yuuichi Kijima, Shigemi Hirasawa, Shunichi Asakura, Mitsuo Hayashibara
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Publication number: 20100180934Abstract: A low softening point glass composition, which is substantially free from lead, bismuth and antimony and comprises oxides of vanadium, phosphorous, tellurium and iron, a softening point of the composition being 380° C. or lower.Type: ApplicationFiled: January 14, 2010Publication date: July 22, 2010Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Keiichi Kanazawa, Shinji Yamada, Satoru Amou, Hiroki Yamamoto, Takuya Aoyagi
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Patent number: 7755269Abstract: It is an object of the present invention to provide a spacer which has an adequate Young's modulus for a spacer used in an image display panel and allows free adjustment of an electric resistance value, and an image display panel using the spacer. The spacer SPC holds a gap between a back panel PNL1 including a signal line CL, a scanning line GL, and an electronic source ELS provided for the main surface of a back substrate SUB1, and a front panel PNL2 including a fluorescent material PH, a black matrix BM, and an anode AD provided for the main surface of a front substrate SUB2. The spacer comprises phosphate glass including the same transition metal element with different valences. For electrical conduction, the included same transition metal element with different valences allows the use of hopping conduction between transition metal atoms with different valences to perform adjustment of electric resistance relatively easily.Type: GrantFiled: January 5, 2007Date of Patent: July 13, 2010Assignee: Hitachi Displays, Ltd.Inventors: Yuichi Sawai, Osamu Shiono, Takashi Namekawa, Nobuhiko Hosotani, Hiroshi Ito, Keiichi Kanazawa, Takashi Naitou, Hiroyuki Akata, Mitsuo Hayashibara, Shigemi Hirasawa, Motoyuki Miyata, Hiroki Yamamoto
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Publication number: 20080238316Abstract: The purpose of the present invention is to provide a plasma display panel containing black colored parts which have high resistant against degradation in blackness or peeling by high-temperature oxidation.Type: ApplicationFiled: January 24, 2008Publication date: October 2, 2008Inventors: Mitsuo Hayashibara, Yuichi Sawai, Hiroki Yamamoto, Motoyuki Miyata, Fusao Hojo, Takashi Naito, Keiichi Kanazawa, Tatsuya Miyake, Hideto Momose
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Publication number: 20080238292Abstract: A plasma display panel comprising a front substrate and a back substrate formed opposite each other and bonded to each other at the peripheries, electrodes formed on the front substrate, a dielectric layer formed on the electrodes, a protective layer formed on the dielectric layer, another electrode and another dielectric layer formed on the back substrate, barrier ribs to keep spaces between the front substrate and the back substrate, and fluorescent materials packed in the spaces formed by the barrier ribs, the front substrate, and the back substrate. The barrier ribs include glass at least containing oxide of tungsten, phosphorus, barium, and vanadium.Type: ApplicationFiled: January 28, 2008Publication date: October 2, 2008Inventors: Hiroki Yamamoto, Takashi Naito, Yuichi Sawai, Motoyuki Miyata, Fusao Hojo, Keiichi Kanazawa, Takashi Fujimura, Mitsuo Hayashibara
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Publication number: 20080238315Abstract: To prevent occurrence of abnormal discharge which would reduce the quality of images in a PDP. At least one of an address electrode, a bus electrode, a bus main electrode, and a black electrode of a display electrode formed on a substrate is formed of metal particles and high-resistance glass to dissipate charge accumulated on a dielectric through the high-resistance glass and to prevent charging in a glass component itself, thereby reducing abnormal discharge. The high-resistance glass is preferably realized by vanadium phosphate glass containing vanadium, phosphorus, antimony, and barium. The metal particles desirably contain flaky particles.Type: ApplicationFiled: January 18, 2008Publication date: October 2, 2008Inventors: Fusao Hojo, Takashi Naito, Hiroki Yamamoto, Yuichi Sawai, Motoyuki Miyata, Mitsuo Hayashibara, Keiichi Kanazawa, Hideto Momose
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Publication number: 20080238821Abstract: To prevent sucking of a sealing material in steps of sealing and exhaust of a plasma display panel. The plasma display panel includes a front substrate and a rear substrate, in which the peripheries thereof are sealed by a glass sealing material. A sealing portion formed by the glass sealing material is formed of a multi-layered structure including at least two types of glass with different softening points. The entirety or part of the sealing portion on an inner side of the panel is formed of glass with the highest softening point. Since the high-temperature softened glass serves as a barrier for preventing sucking of the low-temperature softened glass into the panel, it is possible to prevent sucking of the sealing material into the panel. This can improve image display characteristics.Type: ApplicationFiled: January 25, 2008Publication date: October 2, 2008Inventors: Motoyuki MIYATA, Yuichi SAWAI, Hiroki YAMAMOTO, Takashi NAITO, Keiichi KANAZAWA, Mitsuo HAYASHIBARA, Fusao HOJO
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Publication number: 20080203894Abstract: The purpose of the invention is to improve the mass productivity of display devices by using a glass substrate that prevents the degradation of an electrode caused by glass of the display device. The present invention provides a flat panel display device containing at least two substrates and a light emitting part provided between the two substrates, wherein at least one substrate of the two substrates contains SiO2 as a main component and contains 1% to 10% by weight of at least one type selected from the group consisting of La, Y, Gd, Yb, and Lu in terms of oxides, 5% to 25% by weight of R2O (R denotes one or more types selected from a group consisting of Li, K, Cs, and Rb), and 8% to 20% by weight of Al2O3, and wherein the surface electric resistance at 350° C. of the glass material is higher than 1×108 (?/square).Type: ApplicationFiled: January 23, 2008Publication date: August 28, 2008Inventors: Motoyuki Miyata, Osamu Shiono, Yuichi Sawai, Hiroki Yamamoto, Takashi Naito, Keiichi Kanazawa, Nobuhiko Hosotani, Hiroshi Ito, Akira Hatori
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Publication number: 20080136306Abstract: A spacer according to the present invention for use in a flat panel display, which includes a cathode substrate with a cold cathode electron emitting device formed thereon, an anode substrate with a phosphor formed thereon, and a spacer disposed between the cathode and anode substrates, comprises a base made of a conductive glass, and a conductive crystallized glass layer on a surface of the base. The spacer is more excellent in antistatic characteristics than conventional spacers having a conducting layer on the surface of an insulating glass base. A flat panel display according to the present invention using the spacers permits a higher voltage to be applied, thus increasing image quality.Type: ApplicationFiled: July 5, 2007Publication date: June 12, 2008Inventors: Takashi Naitou, Yuichi Sawai, Osamu Shiono, Mitsuo Hayashibara, Hiroshi Ito, Akira Hatori, Nobuhiko Hosotani, Shoji Shirai, Shigemi Hirasawa, Keiichi Kanazawa, Hiroyuki Akata
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Publication number: 20080007151Abstract: A spacer of the present invention for use in an image display device, which has the spacer between a cathode substrate with a cold cathode electron emitting device formed thereon and an anode substrate with a phosphor formed thereon, comprises a phosphate glass having transition metal oxides as its main components, and a higher phosphate concentration layer at the spacer surface. A thickness of the higher phosphate concentration layer is suppressed to 0.5 ?m or less. More preferably, the spacer has a water resistant conductive passivation layer formed on its surface. This suppresses the thickness of the higher phosphate concentration layer to a thinner level, so that the spacer is less likely to be charged thus reducing the deflection amount of electron beam. An image display device of the present invention using above spacer can apply a higher voltage to the anode substrate, thus increasing the image quality.Type: ApplicationFiled: July 5, 2007Publication date: January 10, 2008Inventors: Takashi Naitou, Yuichi Sawai, Osamu Shiono, Mitsuo Hayashibara, Hiroshi Ito, Akira Hatori, Nobuhiko Hosotani, Shoji Shirai, Shigemi Hirasawa, Keiichi Kanazawa, Hiroyuki Akata
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Publication number: 20070222362Abstract: An image display apparatus is provided which is capable of suppressing generation of cracks to be caused by a load applied to a partition disposed between an anode panel and a cathode panel. The partition for retaining a predetermined distance between back and front substrates by using bonding material is constituted of a partition main body and an electric conducting layer coated on the outer peripheral surface of the partition main body. The partition main body has curved portions at the corners of upper and lower end portions, the curved portions contacting the back and front substrates. It is possible to prevent damages of an electrode to be caused by a mechanical load applied to cathode and anode panels having electrodes on opposing surfaces.Type: ApplicationFiled: December 5, 2005Publication date: September 27, 2007Inventors: Yuichi Sawai, Osamu Shiono, Motoyuki Miyata, Hiroyuki Akata, Yuichi Inoue, Takashi Naito, Keiichi Kanazawa, Kinya Kobayashi
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Publication number: 20070158021Abstract: An object of the present invention is to provide a highly reliable display device by preventing an adhesive layer from being drawn to the inside at the time of vacuum pumping and by securing a sufficient adhesive strength. A crystalline layer CRZ is formed in the surface of an adhesive layer FT between the respective contact surfaces of a first glass substrate SUB1 and a sealing frame FR, as well as of a second glass substrate SUB2 and the sealing frame FR.Type: ApplicationFiled: January 5, 2007Publication date: July 12, 2007Inventors: Yuichi Sawai, Osamu Shiono, Takashi Namekawa, Hiroyuki Akata, Takashi Naito, Keiichi Kanazawa, Yuuichi Kijima, Shigemi Hirasawa, Shunichi Asakura, Mitsuo Hayashibara
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Publication number: 20070159056Abstract: It is an object of the present invention to provide a spacer which has an adequate Young's modulus for a spacer used in an image display panel and allows free adjustment of an electric resistance value, and an image display panel using the spacer. The spacer SPC holds a gap between a back panel PNL1 including a signal line CL, a scanning line GL, and an electronic source ELS provided for the main surface of a back substrate SUB1, and a front panel PNL2 including a fluorescent material PH, a black matrix BM, and an anode AD provided for the main surface of a front substrate SUB2. The spacer comprises phosphate glass including the same transition metal element with different valences. For electrical conduction, the included same transition metal element with different valences allows the use of hopping conduction between transition metal atoms with different valences to perform adjustment of electric resistance relatively easily.Type: ApplicationFiled: January 5, 2007Publication date: July 12, 2007Inventors: Yuichi Sawai, Osamu Shiono, Takashi Namekawa, Nobuhiko Hosotani, Hiroshi Ito, Keiichi Kanazawa, Takashi Naitou, Hiroyuki Akata, Mitsuo Hayashibara, Shigemi Hirasawa, Motoyuki Miyata, Hiroki Yamamoto
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Publication number: 20070021024Abstract: There is provided a method of manufacturing a display panel and an anode panel for improving reliability of a sealing portion of the display panel. Vacuuming (evacuation of air) is performed to inside of a cavity formed by a cathode panel and an anode panel in a state of viscosity in which a sealant melts and deforms in manufacturing of a display.Type: ApplicationFiled: July 19, 2006Publication date: January 25, 2007Inventors: Atsushi Kazawa, Tatsuya Nagata, Takaaki Kitada, Shigemi Hirasawa, Takashi Naitou, Keiichi Kanazawa
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Publication number: 20060290261Abstract: It is an object to provide an electric conductive, Pb-free bonding material for securing spacers for display panels of display devices. The electric conductive bonding material as the first aspect of the present invention contains a V2O5-based glass as a main component, and particles of a metal selected from the group consisting of Pt, Pd, Cr, Ni, Al, Si, Zn, Au and Fe—Ni alloy, or of one or more species of electric conductive ceramics which can be selected from the group consisting of TiC, SiC, WC, ZnO, Fe2O3, FeO, Fe3O4, AgV7O18 and Ag2V4O11 at 10 to 50% by volume. The electric conductive bonding material as the second aspect of the present invention contains V2O5 at 55 to 75%, P2O5 at 15 to 30%, BaO at 0 to 25% Sb2O3 at 0 to 15% (total content of BaO and Sb2O3 adjusted at 5% or more), and GeO2 at 5 to 20% or Ag2O at 3 to 10%, all percentages by mass.Type: ApplicationFiled: June 15, 2006Publication date: December 28, 2006Inventors: Yuichi Sawai, Takashi Naito, Osamu Shiono, Motoyuki Miyata, Hiroyuki Akata, Keiichi Kanazawa, Yuuichi Kijima, Shigemi Hirasawa