Patents by Inventor Toru Numata
Toru Numata 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: 7341354Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: GrantFiled: October 30, 2006Date of Patent: March 11, 2008Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20070040994Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: ApplicationFiled: October 30, 2006Publication date: February 22, 2007Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Patent number: 7128422Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: GrantFiled: July 15, 2005Date of Patent: October 31, 2006Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20050248728Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.Type: ApplicationFiled: July 15, 2005Publication date: November 10, 2005Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Patent number: 6935750Abstract: A display apparatus includes a light source, plural reflecting type light valves having a light incidence/reflection surface which reflects incident light from the light source, and a partition wall which partitions a space in the display apparatus into a cooling air side and a light incidence/reflection surface side. Plural cooling fans which cause air flow to respective ones of the light valves, and a discharge fan which discharges a cooling air inside of the display apparatus through an outlet port are provided. A respective one of the cooling fans flows air to a side which is opposite to the incidence/reflection surface of a respective one of the light valves and a path of the air flow is formed from at least one of the cooling fans to the outlet port in an order of the opposite side of the light valve, the light source and the discharge fan.Type: GrantFiled: August 17, 2004Date of Patent: August 30, 2005Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Patent number: 6908198Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: GrantFiled: October 8, 2004Date of Patent: June 21, 2005Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Patent number: 6895393Abstract: For changing services to readers who desires to obtain electronic books exactly or minutely, an electronic book management system 1 distributes at least electronic purchase certificates relating to books which are stocked at a bookstores owing a bookstore terminal device 2, in advance, to that bookstore terminal device 2. When buying the book(s), a reader obtains in an IC card 4 owned by her/him a purchase certificate(s) of that book(s) which she/he bought, from the bookstore terminal 2. When ordering to obtain the electronic book(s), the reader transmits the purchase certificate(s) from a reader terminal device 3 to the electronic book management system 1 through a communication network 5. The electronic book management system 1 changes over it's service when supplying the electronic book(s) to that reader depending upon the existence of the purchase certificate(s).Type: GrantFiled: October 1, 1999Date of Patent: May 17, 2005Assignee: Hitachi, Ltd.Inventors: Toru Numata, Tadashi Kuwabara, Hiroshi Shimizu, Misuzu Mochizuki, Yukinobu Tada, Naoki Yamamoto, Yutaka Igarashi, Shinichiro Fukushima, Mayumi Ueyama, Rituko Kanazawa, Maki Furui, Katsuki Ikuta
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Publication number: 20050046808Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: ApplicationFiled: October 8, 2004Publication date: March 3, 2005Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Publication number: 20050018143Abstract: A display apparatus includes a light source, plural reflecting type light valves having a light incidence/reflection surface which reflects incident light from the light source, and a partition wall which partitions a space in the display apparatus into a cooling air side and a light incidence/reflection surface side. Plural cooling fans which cause air flow to respective ones of the light valves, and a discharge fan which discharges a cooling air inside of the display apparatus through an outlet port are provided. A respective one of the cooling fans flows air to a side which is opposite to the incidence/reflection surface of a respective one of the light valves and a path of the air flow is formed from at least one of the cooling fans to the outlet port in an order of the opposite side of the light valve, the light source and the discharge fan.Type: ApplicationFiled: August 17, 2004Publication date: January 27, 2005Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20050001970Abstract: For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.Type: ApplicationFiled: July 27, 2004Publication date: January 6, 2005Inventors: Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Naoyuki Ogura, Shigeru Inaoka, Kazunari Nakagawa, Shigeru Mori, Masahiko Yatsu
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Patent number: 6829031Abstract: For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.Type: GrantFiled: January 7, 2003Date of Patent: December 7, 2004Assignee: Hitachi, Ltd.Inventors: Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Naoyuki Ogura, Shigeru Inaoka, Kazunari Nakagawa, Shigeru Mori, Masahiko Yatsu
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Patent number: 6817720Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: GrantFiled: November 24, 2003Date of Patent: November 16, 2004Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Patent number: 6779894Abstract: A display apparatus includes a light source, a reflecting type light valve having a light incidence/reflection surface which reflects incident light from the light source, a first cooling fan which cools the reflecting type light valve, and a second cooling fan which cools the light source. A part of the display apparatus which is opposite to the light incidence/reflection surface of the reflecting type light valve is cooled by a cooling fluid generated by the first cooling fan.Type: GrantFiled: June 18, 2003Date of Patent: August 24, 2004Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20040100621Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: ApplicationFiled: November 24, 2003Publication date: May 27, 2004Applicant: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Patent number: 6682197Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: GrantFiled: May 21, 2003Date of Patent: January 27, 2004Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Publication number: 20030214636Abstract: A display apparatus includes a light source, a reflecting type light valve having a light incidence/reflection surface which reflects incident light from the light source, a first cooling fan which cools the reflecting type light valve, and a second cooling fan which cools the light source. A part of the display apparatus which is opposite to the light incidence/reflection surface of the reflecting type light valve is cooled by a cooling fluid generated by the first cooling fan.Type: ApplicationFiled: June 18, 2003Publication date: November 20, 2003Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20030197840Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: ApplicationFiled: May 21, 2003Publication date: October 23, 2003Applicant: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Patent number: 6588910Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.Type: GrantFiled: March 27, 2001Date of Patent: July 8, 2003Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Otsuka, Toru Numata
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Patent number: 6582083Abstract: A display apparatus having a reflecting type light valve which has a light incidence/reflection surface, a drive circuit which drives the reflecting type light valve by supplying an image signal, a cooling system which cools at least the reflecting type light valve with cooling fluid, and a partition wall which partitions a space in the display apparatus into a cooling fluid side and a light incidence/reflection side. The reflecting type light valve forms a part of the partition wall, and the light incidence/reflection surface faces the light incidence/reflection side and a part opposite to the light incidence/reflection surface of the reflecting type light valve is cooled by the cooling system.Type: GrantFiled: May 8, 2002Date of Patent: June 24, 2003Assignee: Hitachi, Ltd.Inventors: Mikio Shiraishi, Yasuo Ohtsuka, Kenji Fuse, Toru Numata
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Publication number: 20030098944Abstract: For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.Type: ApplicationFiled: January 7, 2003Publication date: May 29, 2003Applicant: Hitachi, Ltd.Inventors: Toru Numata, Yasuo Otsuka, Mikio Shiraishi, Koji Hirata, Naoyuki Ogura, Shigeru Inaoka, Kazunari Nakagawa, Shigeru Mori, Masahiko Yatsu