Patents by Inventor Teruki Suzuki
Teruki Suzuki 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: 7871542Abstract: A plasma display device comprising phosphor layer wherein the phosphor layer comprises blue-emission divalent europium activated alkaline earth silicate phosphor which is represented by the following compositional formula (Ae)3-x(Ae?)Si2O8:Eux, wherein x satisfies 0.01?x?0.1, Ae is at least one alkaline earth element selected from the group consisting of Sr, Ca, and Ba, and Ae? is at least one element selected from the group consisting of Zn or (Zn plus Mg).Type: GrantFiled: September 26, 2006Date of Patent: January 18, 2011Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Teruki Suzuki, Choichiro Okazaki
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Publication number: 20070018912Abstract: The present invention provides a plasma display device, a luminescent device, and an image display system each having an excellent moving-image quality, a long lifetime, and high performance. The plasma display device has a plasma display panel having at least a pair of substrates, a discharge gas space formed between the pair of substrates, electrodes formed on the respective opposing surfaces of the substrates, and a phosphor layer formed on the surface of one of the pair of substrates in contact with the discharge gas space and a driver circuit for driving the panel via the electrodes. In the plasma display device, the decay time ( 1/10 decay time) of light generated from each of the phosphor layers for providing red, green, and blue emission which compose the phosphor layer is not more than 8 ms.Type: ApplicationFiled: September 26, 2006Publication date: January 25, 2007Inventors: Masatoshi Shiiki, Teruki Suzuki, Choichiro Okazaki
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Patent number: 7138965Abstract: The present invention provides a plasma display device, a luminescent device, and an image display system each having an excellent moving-image quality, a long lifetime, and high performance. The plasma display device has a plasma display panel having at least a pair of substrates, a discharge gas space formed between the pair of substrates, electrodes formed on the respective opposing surfaces of the substrates, and a phosphor layer formed on the surface of one of the pair of substrates in contact with the discharge gas space and a driver circuit for driving the panel via the electrodes. In the plasma display device, the decay time ( 1/10 decay time) of light generated from each of the phosphor layers for providing red, green, and blue emission which compose the phosphor layer is not more than 8 ms.Type: GrantFiled: October 30, 2002Date of Patent: November 21, 2006Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Teruki Suzuki, Choichiro Okazaki
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Patent number: 7005197Abstract: The luminance of phosphor is enhanced by forming a phosphor screen of a fluorescence generation unit by phosphor expressed by the following composition formula: (L1-a-bGdaCeb)3(Al1-cGac)5O12:Md wherein, a, b and c are each in the following ranges of 0?a?1.0, 0<b?0.1 and 0?c?1.0, M is dopant of a monovalent metal element and is included in phosphor by approximately 0<d?1000 wt-ppm. Dopant M of a monovalent metal element is at least one type of element selected from a group consisting of K, Na, Li, Cu, Ag and Au. Thus, a display using a white light of improved luminescence and having excellent characteristics can be realized.Type: GrantFiled: February 14, 2002Date of Patent: February 28, 2006Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki, Shin Imamura, Masaaki Komatsu, Hiromichi Yamada
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Patent number: 6838825Abstract: A plasma display includes a display panel and a driving circuit for driving the display panel. A space for at least one color, of spaces between barrier ribs for defining discharge spaces for red, green and blue colors of the display panel is different from the spaces for other colors.Type: GrantFiled: May 28, 2002Date of Patent: January 4, 2005Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki, Keizo Suzuki, Tadashi Furukawa, Masaji Ishigaki
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Patent number: 6762551Abstract: A white light source includes an ultraviolet-visible excitation light generation unit capable of generating visible light and ultraviolet light, and a fluorescence generation unit having a phosphor layer and being capable of generating visible light upon excitation by the ultraviolet light and uses, in the phosphor layer, a red light emitting phosphor represented by the following compositional formula: (Ca1−a−bSraEub)S:Mc, wherein a, b and c satisfy the following conditions: 0≦a<1.0, 0≦b<0.1 and 0≦c≦0.1; and M is a dopant element having absorption of excitation energy at about 350 nm to about 500 nm. The dopant element M includes rare earth elements such as Ce, Yb, Gd and Tm. By substituting part of Ca and/or Sr with Zn, the white light source can exhibit further improved performances.Type: GrantFiled: March 14, 2002Date of Patent: July 13, 2004Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Masaaki Komatsu, Choichiro Okazaki, Shin Imamura, Teruki Suzuki
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Patent number: 6617788Abstract: A phosphor having the following formula: (Ba1-a-b-cCaaSrbMc)O.xMgO.yAl2O3 wherein M is at least one element selected from Eu, Tm, Lu and Mn, and a, b, c, x and y satisfy the following conditions: 0<a≦0.01, 0<b≦0.01, 0.01≦c≦0.3, 0≦x≦2.2, and 0≦y≦12.0; emits visible light under excitation by ultraviolet light of 100 nm to 400 nm. The phosphor is useful in display devices and light sources.Type: GrantFiled: September 7, 2001Date of Patent: September 9, 2003Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki
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Publication number: 20030155856Abstract: A white light source includes an ultraviolet-visible excitation light generation unit capable of generating visible light and ultraviolet light, and a fluorescence generation unit having a phosphor layer and being capable of generating visible light upon excitation by the ultraviolet light and uses, in the phosphor layer, a red light emitting phosphor represented by the following compositional formula: (Ca1−a−bSraEub)S:Mc, wherein a, b and c satisfy the following conditions: 0≦a<1.0, 0≦b<0.1 and 0≦c≦0.1; and M is a dopant element having absorption of excitation energy at about 350 nm to about 500 nm. The dopant element M includes rare earth elements such as Ce, Yb, Gd and Tm. By substituting part of Ca and/or Sr with Zn, the white light source can exhibit further improved performances.Type: ApplicationFiled: March 14, 2002Publication date: August 21, 2003Applicant: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Masaaki Komatsu, Choichiro Okazaki, Shin Imamura, Teruki Suzuki
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Patent number: 6590333Abstract: Rare earth phospho-vandate phosphors containing at least one element of Group IV of the periodic table have spherical or cubic shaped particles and provide higher brightness and longer brightness life, and effective for use in display systems and light emitting systems.Type: GrantFiled: September 29, 2000Date of Patent: July 8, 2003Assignee: Hitachi, Ltd.Inventors: Teruki Suzuki, Masatoshi Shiiki, Choichiro Okazaki, Tadashi Furukawa
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Publication number: 20030085853Abstract: The present invention provides a plasma display device, a luminescent device, and an image display system each having an excellent moving-image quality, a long lifetime, and high performance. The plasma display device has a plasma display panel having at least a pair of substrates, a discharge gas space formed between the pair of substrates, electrodes formed on the respective opposing surfaces of the substrates, and a phosphor layer formed on the surface of one of the pair of substrates in contact with the discharge gas space and a driver circuit for driving the panel via the electrodes. In the plasma display device, the decay time ({fraction (1/10)} decay time) of light generated from each of the phosphor layers for providing red, green, and blue emission which compose the phosphor layer is not more than 8 ms.Type: ApplicationFiled: October 30, 2002Publication date: May 8, 2003Inventors: Masatoshi Shiiki, Teruki Suzuki, Choichiro Okazaki
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Publication number: 20030015955Abstract: The luminance of phosphor is enhanced by forming a phosphor screen of a fluorescence generation unit by phosphor expressed by the following composition formula and a display using a white light the luminescent color of which is improved and which has an excellent characteristic is acquired.Type: ApplicationFiled: February 14, 2002Publication date: January 23, 2003Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki, Shin Imamura, Masaaki Komatsu, Hiromichi Yamada
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Publication number: 20020140354Abstract: A plasma display includes a display panel and a driving circuit for driving the display panel. A space for at least one color, of spaces between barrier ribs for defining discharge spaces for red, green and blue colors of the display panel is different from the spaces for other colors.Type: ApplicationFiled: May 28, 2002Publication date: October 3, 2002Applicant: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki, Keizo Suzuki, Tadashi Furukawa, Masaji Ishigaki
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Patent number: 6411032Abstract: A plasma display includes a display panel and a driving circuit for driving the display panel. A space for at least one color, of spaces between barrier ribs for defining discharge spaces for red, green and blue colors of the display panel is different from the spaces for other colors.Type: GrantFiled: April 13, 1999Date of Patent: June 25, 2002Assignee: Hitachi Ltd.Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki, Keizo Suzuki, Tadashi Furukawa, Masaji Ishigaki
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Publication number: 20020053874Abstract: A phosphor emitting a visible light under an exciting light composed mainly of ultraviolet light of 100 nm to 400 nm, which is represented by the following composition formula:Type: ApplicationFiled: September 7, 2001Publication date: May 9, 2002Applicant: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Choichiro Okazaki, Teruki Suzuki
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Patent number: 5363013Abstract: Disclosed are terbium-activated oxide phosphors having incorporated, at least one of ytterbium, thulium, samarium and europium. Incorporation of the element (s) has made it possible to produce phosphors exhibiting high brightness and suffering little brightness deterioration under high-density electron bombardment.Type: GrantFiled: October 6, 1992Date of Patent: November 8, 1994Assignees: Hitachi Ltd., Kasei Optonix Ltd.Inventors: Hidetsugu Matsukiyo, Teruki Suzuki, Hajime Yamamoto, Yasuhiko Uehara, Yasukazu Morita, Yoshihiro Koseki, Hiromichi Yamada, Shigeo Fujino, Takashi Hase, Tsutomu Yamada, Susumu Omatoi
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Patent number: 5177401Abstract: Disclosed are terbium-activated oxide phosphors having incorporated, at least one of ytterbium, thulium, samarium and europium. Incorporation of the element (s) has made it possible to produce phosphors exhibiting high brightness and suffering little brightness deterioration under high-density electron bombardment.Type: GrantFiled: December 4, 1989Date of Patent: January 5, 1993Assignees: Hitachi, Ltd., Kasei Optonix Ltd.Inventors: Hidetsugu Matsukiyo, Teruki Suzuki, Hajime Yamamoto, Yasuhiko Uehara, Yasukazu Morita, Yoshihiro Koseki, Hiromichi Yamada, Shigeo Fujino, Takashi Hase, Tsutomu Yamada, Susumu Omatoi
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Patent number: 5081394Abstract: A black matrix color picture tube has a phosphor layer and black matrix layer formed on the inner surface of the faceplate. A layer of glass having a low softening point is provided between the phosphor layer and the inner surface of the faceplate and between the black matrix layer and the inner surface of the faceplate. The softening point of the glass is below the temperature at which the tube is subjected during a frit baking step employed in the fabrication of the tube. For example, a borophosphate glass is used as the layer of glass having a low softening point.Type: GrantFiled: August 31, 1988Date of Patent: January 14, 1992Assignee: Hitachi, Ltd.Inventors: Hajime Morishita, Nobuaki Hayashi, Saburo Nonogaki, Masahiro Nishizawa, Kiyoshi Miura, Teruki Suzuki
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Patent number: 4353808Abstract: A phosphor represented by the formula:a (Sr.sub.1-x-y-z M.sub.x.sup.II M.sub.y.sup.III Eu.sub.z.sup.2+).sub.3 (PO.sub.4).sub.2 .multidot.b M'X.sub.2 (I)wherein M.sup.II is at least one element selected from the group consisting of Zn, Mg, Ca and Ba; M.sup.III is at least one element selected from the group consisting of Al, Y, Gd and La; M' is at least one element selected from the group consisting of Ca, Sr and Ba; X is one or more halogens; x, y and z should satisfy the following conditions, i.e. 0.ltoreq.x.ltoreq.0.999, 0.ltoreq.y.ltoreq.0.999, 0.0015.ltoreq.z.ltoreq.0.20 and x+y+z.ltoreq.1; and the ratio a/b is in the range of 0.3.ltoreq.a/b.ltoreq.3.0, provided that when y=0, the ratio a/b should be in the range of 0.3.ltoreq.a/b<3.0, and when x=0, the ratio a/b should be in the range of 0.3.ltoreq.a/b.ltoreq.1.2, is stable against the baking in the air and has high emission efficiency and excitation purity and can be used effectively as a blue phosphor of light sources for illumination.Type: GrantFiled: March 27, 1980Date of Patent: October 12, 1982Assignee: Hitachi, Ltd.Inventors: Shinkichi Tanimizu, Masaki Nakano, Teruki Suzuki, Toshikatsu Manabe
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Patent number: 4171501Abstract: A light emitting device wherein a blue screen or a red screen is excited by 5 to 25eV photons or electrons, the blue screen containing a self-activated phosphor which is represented by the general formula MP.sub.b V.sub.1-b O.sub.4 where M stands for at least one member selected from the group consisting of yttrium (Y), scandium (Sc), rare-earth elements having atomic numbers of 57-62 and 64-71, and group-IIIb elements of the periodic table, and where O<b<1.0, the red screen containing a trivalent europium (Eu.sup.3+) activated phosphor which is represented by the general formula M.sub.1-a Eu.sub.a P.sub.b V.sub.1-b O.sub.4 where M stands for at least one member selected from the group consisting of yttrium (Y), scandium (Sc), rare-earth elements having atomic numbers of 57-62 and 64-71, and group-IIIb elements of the periodic table, and where O<a<1.0 and 0<b.ltoreq.1.0.Type: GrantFiled: November 7, 1977Date of Patent: October 16, 1979Assignee: Hitachi, Ltd.Inventors: Shinkichi Tanimizu, Teruki Suzuki, Tadashi Fukuzawa
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Patent number: 4107571Abstract: A light emitting device wherein a blue screen or a red screen is excited by 5 to 25eV photons or electrons, the blue screen containing a self-activated phosphor which is represented by the general formula MP.sub.b V.sub.1-b O.sub.4 where M stands for at least one member selected from the group consisting of yttrium (Y), scandium (Sc), rare-earth elements having atomic numbers of 57 - 62 and 64 - 71, and group-IIIb elements of the periodic table, and where 0 <b<1.0, the red screen containing a trivalent europium (Eu.sup.3+) activated phosphor which is represented by the general formula M.sub.1-a Eu.sub.a P.sub.b V.sub.1-b O.sub.4 where M stands for at least one member selected from the group consisting of yttrium (Y), scandium (Sc), rare-earth elements having atomic numbers of 57 - 62 and 64 - 71, and group-IIIb elements of the periodic table, and where 0<a <1.0 and 0<b.ltoreq.1.0.Type: GrantFiled: October 22, 1974Date of Patent: August 15, 1978Assignee: Hitachi, Ltd.Inventors: Shinkichi Tanimizu, Teruki Suzuki, Tadashi Fukuzawa