Patents by Inventor Eiji Ohta
Eiji Ohta 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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Publication number: 20070242478Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a finite focal distance on the emission side of illumination light and have an aspheric face of a leftwardly and rightwardly symmetric sectional shape. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2))+AX4+BX5+CX6+ . . . (where R is the radius of curvature of a distal end vertex, K is a conic constant, and A, B, C, . . . are aspheric coefficients).Type: ApplicationFiled: September 30, 2005Publication date: October 18, 2007Applicant: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Publication number: 20070242479Abstract: An optical sheet, a backlight device, and a liquid crystal display device are provided. The beam-condensing optical sheet includes a large number of irregularity portions arranged on one main surface of a light-transmissive base, in which a pitch of arrangement of the irregularity portions is 110 ?m or more and 330 ?m or less, and surface roughness (Ra) of the irregularity portion is 0.1 ?m or less.Type: ApplicationFiled: April 16, 2007Publication date: October 18, 2007Applicant: SONY CORPORATIONInventors: Eiji Ohta, Toru Abiko, Masato Ishigaki, Satoshi Sato, Yasuhiro Nishida, Akihiro Horii
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Publication number: 20070242361Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).Type: ApplicationFiled: September 30, 2005Publication date: October 18, 2007Applicant: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Patent number: 7131594Abstract: An IC card having high reliability, which is not only in that printing can be surely conducted with respect to the reversible display layer provided on the surface of the card substrate, but also in that the IC chip is surely protected by the reinforcing sheet. An IC card which has: an IC module (1) including an IC chip (14) mounted on an insulating substrate (11), and a reinforcing sheet (16) provided over the IC chip (14) through a sealing resin (15) for sealing the IC chip (14); a card substrate (2) comprised of a resin for sealing the IC module (1); and a reversible recording layer (3) provided on at least one surface of the card substrate (2), wherein reinforcing film patterns (13), (13?) having openings (13a), (13a?) which expose the IC chip (14) mounted portion are provided on at least one of the IC chip (14) mounted surface and the non-mounted surface of the insulating substrate (11).Type: GrantFiled: May 30, 2002Date of Patent: November 7, 2006Assignee: Sony CorporationInventors: Eiji Ohta, Osamu Ishii
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Publication number: 20060141227Abstract: A synthetic resin card in which card warpage can be reduced and a method for producing the same are provided. By setting the difference ? in the angle of orientation between outer layers symmetrically laminated on a card core section, it is possible to reduce imbalance of stress resulting from the difference in the shrinkage factor between the outer layers, and card warpage can be suppressed. Furthermore, by setting the thickness of the outer layers at 25 ?m to 125 ?m, rising of the surface of the synthetic resin card can be reduced. By reducing the card warpage and the rising of the surface of the synthetic resin card, it is possible to improve moving characteristics when the synthetic resin card is allowed to move in a device.Type: ApplicationFiled: June 23, 2004Publication date: June 29, 2006Inventors: Miki Sudo, Eiji Ohta, Shinichi Matsumura
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Patent number: 6942156Abstract: In an IC card, an IC module constructed by mounting an IC chip and an antenna circuit on a substrate is sandwiched between at least a pair of exterior films. The IC chip is sealed with resin on its outside and reinforced by a reinforcement material having a substantially circular shape with a diameter greater than a longest dimension value of the IC chip. The height variation amount of the shape of the reinforcement material on a surface thereof is within a range of 20 ?m or less. The reliability of the IC chip is ensured while the outer appearance of the card and print characteristic are not degraded.Type: GrantFiled: November 22, 2001Date of Patent: September 13, 2005Assignee: Sony CorporationInventors: Eiji Ohta, Norihiko Yamazaki, Shinichi Matsumura
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Patent number: 6853280Abstract: A method of magnetizing a magnetic sheet, said method able to magnetize a roll sheet conveniently at a high speed and stably including the steps of bringing a cylindrical permanent magnet having N-poles and S-poles multipolar-magnetized alternately along its circumference into contact with one surface of a long magnetic sticking sheet having an axis of easy magnetization oriented in a sheet longitudinal direction so that the sheet longitudinal direction is orthogonal to a shaft of the permanent magnet and multipolar-magnetizing the magnetic sticking sheet along the axis of easy magnetization by rotating the cylindrical permanent magnet due to the magnetic sticking sheet being rolled up, wherein the angle of contact of the magnetic sticking sheet fed to the cylindrical permanent magnet is made 45° or less, and a magnetization apparatus used for the method.Type: GrantFiled: December 30, 2002Date of Patent: February 8, 2005Assignee: Sony CorporationInventors: Toshiaki Sugawara, Shinichi Matsumura, Kazuto Kawamata, Eiji Ohta
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Publication number: 20040169086Abstract: An IC card having high reliability, which is not only in that printing can be surely conducted with respect to the reversible display layer provided on the surface of the card substrate, but also in that the IC chip is surely protected by the reinforcing sheet. An IC card which has: an IC module (1) including an IC chip (14) mounted on an insulating substrate (11), and a reinforcing sheet (16) provided over the IC chip (14) through a sealing resin (15) for sealing the IC chip (14); a card substrate (2) comprised of a resin for sealing the IC module (1); and a reversible recording layer (3) provided on at least one surface of the card substrate (2), wherein reinforcing film patterns (13), (13′) having openings (13a), (13a′) which expose the IC chip (14) mounted portion are provided on at least one of the IC chip (14) mounted surface and the non-mounted surface of the insulating substrate (11).Type: ApplicationFiled: December 5, 2003Publication date: September 2, 2004Inventors: Eiji Ohta, Osamu Ishii
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Publication number: 20040159709Abstract: To provide an IC card, which secures satisfied flatness of the card surface to achieve good printing properties on the card surface. An IC card has a core layer which includes a plurality of sheet materials wherein inner core sheets adjacent to an IC module have through holes formed in a region corresponding to the IC mounted portion, wherein a relationship A=(B1+C1)±30 &mgr;m is satisfied, where A (&mgr;m) represents the sum of heights of the through holes, B1 represents a projection height on an IC mounted surface of the IC module, and C1 represents a projection height on an IC non-mounted surface. By virtue of having this structure, the IC card can secure card flatness sufficient to obtain satisfied printing properties with respect to the rewrite sheet.Type: ApplicationFiled: December 1, 2003Publication date: August 19, 2004Inventors: Eiji Ohta, Shinichi Matsumura
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Patent number: 6714114Abstract: A magnetic sticking sheet comprising a non-magnetic base and a magnetic layer formed on the non-magnetic base by coating a magnetic coating material containing ferromagnetic particles and a binder, the magnetic layer having a thickness of 0.03 to 0.10 mm, oriented longitudinally to give a squareness ratio of 80 to 90%, and multipolar-magnetized longitudinally; the sheet having a total thickness of 0.08 to 0.25 mm and flexibility for rolling; the magnetic layer having a surface magnetic flux density of 35 to 100G; and the sheet having a magnetic sticking force, required for removing a magnetic sticking sheet fixed magnetically on a magnetic surface via the magnetic layer while keeping the magnetic surface and the sheet parallel, of 0.4 to 0.9 gf/cm2.Type: GrantFiled: June 2, 2003Date of Patent: March 30, 2004Assignee: Sony CorporationInventors: Shinichi Matsumura, Miki Sudo, Kazuto Kawamata, Eiji Ohta
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Patent number: 6693506Abstract: A magnetic sticking sheet comprising a non-magnetic base and a magnetic layer formed on the non-magnetic base by coating a magnetic coating material containing ferromagnetic particles and a binder, the magnetic layer having a thickness of 0.03 to 0.10 mm, oriented longitudinally to give a squareness ratio of 80 to 90%, and multipolar-magnetized longitudinally; the sheet having a total thickness of 0.08 to 0.25 mm and flexibility for rolling; the magnetic layer having a surface magnetic flux density of 35 to 100G; and the sheet having a magnetic sticking force, required for removing a magnetic sticking sheet fixed magnetically on a magnetic surface via the magnetic layer while keeping the magnetic surface and the sheet parallel, of 0.4 to 0.9 gf/cm2.Type: GrantFiled: July 12, 2002Date of Patent: February 17, 2004Inventors: Shinichi Matsumura, Miki Sudo, Kazuto Kawamata, Eiji Ohta
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Publication number: 20030218525Abstract: A method of magnetizing a magnetic sheet, said method able to magnetize a roll sheet conveniently at a high speed and stably including the steps of bringing a cylindrical permanent magnet having N-poles and S-poles multipolar-magnetized alternately along its circumference into contact with one surface of a long magnetic sticking sheet having an axis of easy magnetization oriented in a sheet longitudinal direction so that the sheet longitudinal direction is orthogonal to a shaft of the permanent magnet and multipolar-magnetizing the magnetic sticking sheet along the axis of easy magnetization by rotating the cylindrical permanent magnet due to the magnetic sticking sheet being rolled up, wherein the angle of contact of the magnetic sticking sheet fed to the cylindrical permanent magnet is made 45° or less, and a magnetization apparatus used for the method.Type: ApplicationFiled: December 30, 2002Publication date: November 27, 2003Inventors: Toshiaki Sugawara, Shinichi Matsumura, Kazuto Kawamata, Eiji Ohta
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Publication number: 20030206091Abstract: A magnetic sticking sheet comprising a non-magnetic base and a magnetic layer formed on the non-magnetic base by coating a magnetic coating material containing ferromagnetic particles and a binder, the magnetic layer having a thickness of 0.03 to 0.10 mm, oriented longitudinally to give a squareness ratio of 80 to 90%, and multipolar-magnetized longitudinally; the sheet having a total thickness of 0.08 to 0.25 mm and flexibility for rolling; the magnetic layer having a surface magnetic flux density of 35 to 100G; and the sheet having a magnetic sticking force, required for removing a magnetic sticking sheet fixed magnetically on a magnetic surface via the magnetic layer while keeping the magnetic surface and the sheet parallel, of 0.4 to 0.9 gf/cm2.Type: ApplicationFiled: June 2, 2003Publication date: November 6, 2003Inventors: Shinichi Matsumura, Miki Sudo, Kazuto Kawamata, Eiji Ohta
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Publication number: 20030062420Abstract: In an IC card, an IC module constructed by mounting an IC chip and an antenna circuit on a substrate is sandwiched between at least a pair of exterior films. The IC chip is sealed with resin on its outside and reinforced by a reinforcement material having a substantially circular shape with a diameter greater than a longest dimension value of the IC chip. The height variation amount of the shape of the reinforcement material on a surface thereof is within a range of 20 &mgr;m or less. The reliability of the IC chip is ensured while the outer appearance of the card and print characteristic are not degraded.Type: ApplicationFiled: July 25, 2002Publication date: April 3, 2003Inventors: Eiji Ohta, Norihiko Yamazaki, Shinichi Matsumura
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Publication number: 20030034869Abstract: A magnetic sticking sheet comprising a non-magnetic base and a magnetic layer formed on the non-magnetic base by coating a magnetic coating material containing ferromagnetic particles and a binder, the magnetic layer having a thickness of 0.03 to 0.10 mm, oriented longitudinally to give a squareness ratio of 80 to 90%, and multipolar-magnetized longitudinally; the sheet having a total thickness of 0.08 to 0.25 mm and flexibility for rolling; the magnetic layer having a surface magnetic flux density of 35 to 100G; and the sheet having a magnetic sticking force, required for removing a magnetic sticking sheet fixed magnetically on a magnetic surface via the magnetic layer while keeping the magnetic surface and the sheet parallel, of 0.4 to 0.9 gf/cm2.Type: ApplicationFiled: July 12, 2002Publication date: February 20, 2003Inventors: Shinichi Matsumura, Miki Sudo, Kazuto Kawamata, Eiji Ohta
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Patent number: 6388767Abstract: An image processing apparatus having a function for detecting a specific original decides the degree of similarity between the image represented by input image signals and the image of a specific original which is not to be allowed to be copied, e.g., currency. The image processing apparatus determines the content of the image processing in accordance with the result of the decision, and processes the input image signals on the basis of the determined content.Type: GrantFiled: May 23, 1995Date of Patent: May 14, 2002Assignee: Canon Kabushiki KaishaInventors: Yutaka Udagawa, Masahiro Funada, Ken-ich Ohta, Yoichi Takaragi, Toshiyuki Kitamura, Eiji Ohta
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Patent number: 6381030Abstract: An image processing apparatus having a function for detecting a specific original decides the degree of similarity between the image represented by input image signals and the image of a specific original which is not to be allowed to be copied, e.g., currency. The image processing apparatus determines the content of the image processing in accordance with the result of the decision, and processes the input image signals on the basis of the determined content.Type: GrantFiled: June 14, 2000Date of Patent: April 30, 2002Assignee: Canon Kabushiki KaishaInventors: Yutaka Udagawa, Masahiro Funada, Ken-ich Ohta, Yoichi Takaragi, Toshiyuki Kitamura, Eiji Ohta
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Patent number: 6346989Abstract: A device for controlling the copying of an original includes a discriminator for discriminating a specific original in accordance with the degree of significance of the specific original, when discriminating a plurality of specific originals in forming one image. According to another embodiment, the device includes an inhibitor for inhibiting the copying of a specific original, when a memory or peripheral circuit having the discrimination criteria of the specific original is removed or exchanged, or it is out of order, and making a discrimination of the specific original by the same characteristic data of the specific original, even if the image is input from different input equipment, wherein the correct discrimination is effected based on the color tint distribution of the specific original.Type: GrantFiled: January 2, 1997Date of Patent: February 12, 2002Assignee: Canon Kabushiki KaishaInventors: Masahiro Funada, Kenichi Ohta, Yutaka Udagawa, Yoichi Takaragi, Mitsuru Kurita, Eiji Ohta, Koichi Ishimoto
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Patent number: 5949903Abstract: An image processing apparatus includes an input device for inputting image data representing an original, a discrimination unit for discriminating whether the original includes a predetermined color image, and an output unit for outputting a discrimination result of the discrimination unit. The discrimination unit performs discriminations corresponding to a first predetermined color image and a second predetermined color image which is different from the first predetermined color image. The discrimination unit includes a color memory which stores first and second standards corresponding to the first and second predetermined color images, respectively.Type: GrantFiled: June 7, 1995Date of Patent: September 7, 1999Assignee: Canon Kabushiki KaishaInventors: Kenichi Outa, Masahiro Funada, Yoichi Takaragi, Eiji Ohta
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Patent number: 5917938Abstract: An image processing apparatus of the present invention inputs image data representing an image, discriminates whether the image represented by the input image data is a first predetermined image, and discriminates whether the image represented by the input image data is a second predetermined image different from the first predetermined image, the above-mentioned two discrimination performing discriminating operation parallelly.Type: GrantFiled: November 13, 1997Date of Patent: June 29, 1999Assignee: Canon Kabushiki KaishaInventors: Masahiro Funada, Ken-ichi Ohta, Yoichi Takaragi, Eiji Ohta