Patents by Inventor Hiroaki Miwa
Hiroaki Miwa 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: 20070182912Abstract: The present invention provides a liquid crystal display panel which can prevent a leak path of a sealing material when liquid crystal is brought into contact with an uncured sealing material in a sealing step and a manufacturing method thereof. In a liquid crystal display panel which forms a display region by providing liquid crystal in a gap defined between one substrate and another substrate, a weir which is continuously formed so as to surround the display region and a sealing material which is arranged to cover the weir are arranged on a surface of one substrate.Type: ApplicationFiled: February 8, 2007Publication date: August 9, 2007Inventors: Setsuo Kobayashi, Hiroaki Miwa, Katsuhiko Ishii
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Publication number: 20050156517Abstract: Electroluminescence elements mounted on a substrate of an OLED display device are sealed by a protective film made of synthetic resin with chemical reaction curing in place of a sealing can. The protective film is formed such that a thickness thereof is equal to or larger than a thickness of the substrate. Alternatively, the protective film is formed by laminating a plurality of resin films which differ in one of the water absorption ratio, the elastic modulus and the hardness. With respect to the protective film which is formed of a plurality of laminated films, compared to the protective film at the electroluminescence element side, the protective film which covers the former protective film has the water absorption ratio, the elastic modulus or the hardness larger than the water absorption ratio, the elastic modulus or the hardness of the former protective film.Type: ApplicationFiled: March 11, 2005Publication date: July 21, 2005Inventors: Hiroaki Miwa, Katsuhiko Ishii, Setsuo Kobayashi, Yuji Mori
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Publication number: 20050088606Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.Type: ApplicationFiled: October 21, 2004Publication date: April 28, 2005Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
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Patent number: 6882104Abstract: Electroluminescence elements mounted on a substrate of an OLED display device are sealed by a protective film made of synthetic resin with chemical reaction curing in place of a sealing can. The protective film is formed such that a thickness thereof is equal to or larger than a thickness of the substrate. Alternatively, the protective film is formed by laminating a plurality of resin films which differ in one of the water absorption ratio, the elastic modulus and the hardness. With respect to the protective film which is formed of a plurality of laminated films, compared to the protective film at the electroluminescence element side, the protective film which covers the former protective film has the water absorption ratio, the elastic modulus or the hardness larger than the water absorption ratio, the elastic modulus or the hardness of the former protective film.Type: GrantFiled: November 22, 2002Date of Patent: April 19, 2005Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Hiroaki Miwa, Katsuhiko Ishii, Setsuo Kobayashi, Yuji Mori
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Publication number: 20030135135Abstract: An ultrasonic irradiation apparatus is presented which is capable of easily irradiating, with ultrasonic waves, a wide area (range) of an object having three-dimensionally curved surfaces. The apparatus includes an ultrasonic irradiator having a plurality of ultrasonic transducers arranged in planar manner, wherein the position of at least a portion of the ultrasonic transducers is arranged to be mutually and flexibly changeable in three dimensions. The ultrasonic irradiator includes a plurality of ultrasonic transducers installed on a surface of a sheet member being flexible and/or elastic or on a net member being flexible and/or elastic. The ultrasonic irradiator further includes a plurality of ultrasonic transducers composed of a flexible piezoelectric sheet member, wherein driving electrodes are arranged on one surface and opposed electrodes are arranged on another surface facing each other.Type: ApplicationFiled: November 21, 2002Publication date: July 17, 2003Inventors: Hirohide Miwa, Hiroaki Miwa, Masato Kino
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Patent number: 6573025Abstract: An optical disc used with an optical head with a focus depth of about 2 micron meter minimizes defects and deterioration in the optical disc at the time of manufacture, during operation and storage thereof as well. The optical disc includes a pair of transparent substrates each provided with at least one layer enabling recording of information, with the pair being bonded and laminated together has an instantaneous axial acceleration<2G.Type: GrantFiled: June 3, 2002Date of Patent: June 3, 2003Assignees: Hitachi, Ltd., Hitachi Maxell Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Publication number: 20030098648Abstract: Electroluminescence elements mounted on a substrate of an OLED display device are sealed by a protective film made of synthetic resin with chemical reaction curing in place of a sealing can. The protective film is formed such that a thickness thereof is equal to or larger than a thickness of the substrate. Alternatively, the protective film is formed by laminating a plurality of resin films which differ in one of the water absorption ratio, the elastic modulus and the hardness. With respect to the protective film which is formed of a plurality of laminated films, compared to the protective film at the electroluminescence element side, the protective film which covers the former protective film has the water absorption ratio, the elastic modulus or the hardness larger than the water absorption ratio, the elastic modulus or the hardness of the former protective film.Type: ApplicationFiled: November 22, 2002Publication date: May 29, 2003Applicant: Hitachi, Ltd. and Hitachi Device Engineering Co. Ltd.Inventors: Hiroaki Miwa, Katsuhiko Ishii, Setsuo Kobayashi, Yuji Mori
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Publication number: 20020150836Abstract: An optical disc used with an optical head with a focus depth of about 2 micron meter minimizes defects and deterioration in the optical disc at the time of manufacture, during operation and storage thereof as well. The optical disc includes a pair of transparent substrates each provided with at least one layer enabling recording of information, with the pair being bonded and laminated together has an instantaneous axial acceleration<2 G.Type: ApplicationFiled: June 3, 2002Publication date: October 17, 2002Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 6465151Abstract: The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through specifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration<2 G measured at room temperatures, a skew angle<5 mrad measured at room temperatures, and a skew angle<5 mrad measured after being left for one hour as heated to 80° C. (otherwise, a shear mass<20 &mgr;m measured after being left for one hour as heated to 80° C.Type: GrantFiled: August 22, 2000Date of Patent: October 15, 2002Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 6140028Abstract: The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through specifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration<2 G measured at room temperatures, a skew angle<5 mrad measured at room temperatures, and a skew angle <5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass<20 .mu.m measured after being left for one hour as heated to 80.degree. C.Type: GrantFiled: July 6, 1999Date of Patent: October 31, 2000Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 5906907Abstract: The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through spcifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration<2 G measured at room temperatures, a skew angle<5 mrad measured at room temperatures, and a skew angle<5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass<20 .mu.m measured after being left for one hour as heated to 80.degree. C.Type: GrantFiled: January 27, 1997Date of Patent: May 25, 1999Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 5766407Abstract: An optical disk producing apparatus produces an optical disk by bonding a pair of replica disks together. The replica disks are disposed in a sealed space to oppose to each other with a predetermined gap therebetween. The sealed space is defined by a peripheral wall and opposite ends. The peripheral wall is divided into two portions which are slidingly movable relative to each other. When the sealed space is evacuated, the two portions are moved to apply an atmospheric pressure to the replica disks, so that the replica disks are bonded together into an optical disk.Type: GrantFiled: July 30, 1996Date of Patent: June 16, 1998Assignee: Hitachi, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Toshiaki Taii
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Patent number: 5686227Abstract: The object of the present invention is to provide an optical disc, a method of manufacturing thereof and an optical reproduction apparatus including the same wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through specifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration <2G measured at room temperatures, a skew angle <5 mrad measured at room temperatures, and a skew angle <5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass <20 .mu.m measured after being left for one hour as heated to 80.degree.Type: GrantFiled: June 28, 1996Date of Patent: November 11, 1997Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 5582677Abstract: An optical disk producing apparatus produces an optical disk by bonding a pair of replica disks together. The replica disks are disposed in a sealed space to oppose to each other with a predetermined gap therebetween. The sealed space is defined by a peripheral wall and opposite ends. The peripheral wall is divided into two portions which are slidingly movable relative to each other. When the sealed space is evacuated, the two portions are moved to apply an atmospheric pressure to the replica disks, so that the replica disks are bonded together into an optical disk.Type: GrantFiled: October 15, 1993Date of Patent: December 10, 1996Assignee: Hitachi, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Toshiaki Taii
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Patent number: 5543271Abstract: The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through specifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration <2 G measured at room temperatures, a skew angle <5 mrad measured at room temperatures, and a skew angle <5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass <20 .mu.m measured after being left for one hour as heated to 80.degree. C.Type: GrantFiled: January 20, 1995Date of Patent: August 6, 1996Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 5427893Abstract: This invention is related to an optical data recording medium of a high reliability and a large capacity, preventing moisture absorption and swelling of a resin layer formed on one side of a transparent substrate, and related to a method for manufacturing thereof wherever the optical data recording medium comprises at least a transparent substrate, a transferred layer of a preformat pattern formed on the transparent substrate and a thin film layer formed on the transferred layer wherein at least the surface of the transferred layer in contact with the transparent substrate is made of a resin layer composed of an ultraviolet ray curable resin resulting in an optical data recording medium having a reduced absorbing moisture of the transferred layer thereof and wherever the ratio of swelling (.DELTA.d/d) is restricted to 0.1% or less.Type: GrantFiled: March 10, 1993Date of Patent: June 27, 1995Assignees: Hitachi Maxell, Ltd., Hitachi, Ltd.Inventors: Eiji Koyama, Akira Gotoh, Shuhei Nakamichi, Ryoichi Sudo, Hiroaki Miwa
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Patent number: 5401610Abstract: The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through specifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration <2G measured at room temperatures, a skew angle <5 mrad measured at room temperatures, and a skew angle <5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass <20 .mu.m measured after being left for one hour as heated to 80.degree. C.Type: GrantFiled: April 29, 1993Date of Patent: March 28, 1995Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 5244775Abstract: The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through specifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration <2G measured at room temperatures, a skew angle <5 mrad measured at room temperatures, and a skew angle <5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass <20 .mu.m measured after being left for one hour as heated to 80.degree. C.Type: GrantFiled: March 20, 1992Date of Patent: September 14, 1993Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.Inventors: Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima, Eiji Koyama
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Patent number: 5234792Abstract: This invention is related to an optical data recording medium of a high reliability and a large capacity, preventing moisture absorption and swelling of a resin layer formed on one side of a transparent substrate, and related to a method for manufacturing thereof whatever the optical data recording medium comprises at least a transparent substrate, a transferred layer of a preformat pattern formed on the transparent substrate and a thin film layer formed on the transferred layer wherein at least the surface of the transferred layer in contact with the transparent substrate is made of a resin layer composed of an ultraviolet ray curable resin resulting in an optical data recording medium having a reduced absorbing moisture of the transferred layer thereof and whatever the ratio of swelling (.DELTA.d/d) is restricted to 0.1% or less.Type: GrantFiled: August 17, 1992Date of Patent: August 10, 1993Assignees: Hitachi Maxell, Ltd., Hitachi, Ltd.Inventors: Eiji Koyama, Akira Gotoh, Shuhei Nakamichi, Ryoichi Sudo, Hiroaki Miwa
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Patent number: 5071236Abstract: This invention relates to a replica plate having a transparent plastic substrate and a photo-cured resin, and a projection type television using the replica plate. An adhesive layer comprising an acrylic or methacrylic compound is provided between a transparent plastic plate and a replica-forming photo-curable resin, whereby it is possible to enhance the adhesion between the surface of the transparent plastic plate and the photo-cured resin, and to produce a replica plate having excellent optical characteristics, good replicating properties and high reliability. The adhesive layer can be provided (1) by coating a layer containing the acrylic or methacrylic compound on the plastic plate, the compound infiltrating into the plate, or (2) by incorporating the acrylic or methacrylic compound into the photo-curable resin, the compound infiltrating therefrom into the plate; in this latter technique, the plate coated with the resin should be heated.Type: GrantFiled: March 20, 1990Date of Patent: December 10, 1991Assignee: Hitachi, Ltd.Inventors: Ryoichi Sudo, Chiyoko Iwano, Hiroaki Miwa, Tetsuo Tajima, Hiroyuki Onodera