Patents by Inventor Takehiro Niitsu
Takehiro Niitsu 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: 20070045521Abstract: An optical distribution module includes at least one light emitting element that converts an optical signal to an electrical signal, at least one light receiving element that converts the optical signal to the electrical signal, and a distribution circuit that is arranged so as to optically couple the light emitting element and the light receiving element. The distribution circuit branches or couples the optical signal from the light emitting element so as to emit the optical signal to the light receiving element.Type: ApplicationFiled: January 24, 2006Publication date: March 1, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Junji Okada, Shinobu Ozeki, Jun Kitamura, Seiji Suzuki, Takeshi Kamimura, Yoshihide Sato, Masaru Kijima, Osamu Ohtani, Norihiko Kuroishi, Tomo Baba, Hisayoshi Mori, Tsutomu Hamada, Takehiro Niitsu, Shinya Kyozuka
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Publication number: 20070043898Abstract: An information processing system includes a host device, a storage device and a bus. The bus transmits data to which an error correction code is appended, between the host device and the storage device. The storage device includes a storage section that stores the data. The storage device writes and reads the data received from the bus to and from the storage section with the error correction code appended to the data.Type: ApplicationFiled: July 10, 2006Publication date: February 22, 2007Inventors: Shinobu Ozeki, Takeshi Kamimura, Seiji Suzuki, Masaru Kijima, Jun Kitamura, Yoshihide Sato, Junji Okada, Shinya Kyozuka, Takehiro Niitsu, Kazuhiro Sakai, Kazuhiro Suzuki, Tsutomu Hamada, Norihiko Kuroishi
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Publication number: 20060277586Abstract: A signal communication apparatus includes a transmission component, a reception component and an identification information storage component. The transmission component is connectable to an information processing device and a signal propagation medium, and transmits an inputted image signal through the connected signal propagation medium. The reception component is connectable with an image display device and the signal propagation medium, receives the image signal transmitted from the transmission component through the connected signal propagation medium, and outputs the image signal to the connected image display device. The identification information storage component is removably attached to the transmission component, and stores identification information for identifying the image display device.Type: ApplicationFiled: November 15, 2005Publication date: December 7, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Tomo Baba, Kazuhiro Suzuki, Hisayoshi Mori, Kazuhiro Sakai, Junji Okada, Masao Funada, Shinobu Ozeki, Shinya Kyozuka, Takehiro Niitsu, Hidenori Yamada
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Patent number: 7146065Abstract: In an optical wiring board, an optical components including a planar optical waveguide, a plurality of first optical fibers optically connected via a transmissive diffusion plate to a light incident face of the waveguide, and a plurality of second optical fibers optically connected to a light emitting face of the waveguide is placed on a support board. The optical component is sealed by a sealing member made of a resin.Type: GrantFiled: December 8, 2003Date of Patent: December 5, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Takehiro Niitsu, Masao Funada, Kenichi Kobayashi, Hidenori Yamada, Takeshi Kamimura, Junji Okada, Shinya Kyozuka, Kazuhiro Sakai, Tomo Baba, Tsutomu Hamada, Masashi Hisada, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura
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Publication number: 20060187983Abstract: A light emitting element driving circuit includes: plural AC-coupling capacitors which are connected together in series; and a bias generating circuit which generates a bias current, wherein a light emitting element is driven by superposing a modulating current to the bias current via the plural AC-coupling capacitors.Type: ApplicationFiled: August 19, 2005Publication date: August 24, 2006Applicant: Fuji Xerox Co., Ltd.Inventors: Tomo Baba, Shinya Kyozuka, Hisayoshi Mori, Kazuhiro Suzuki, Shinobu Ozeki, Takehiro Niitsu, Hidenori Yamada, Masao Funada
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Patent number: 7065270Abstract: An optical transmission device improved in optical coupling loss between light guides and optical elements and excelling in efficiency of light utilization is provided with light guides having light incidence/emission sections on plural stepped portions, a substrate that fixes the light guides, and light receiving elements and light emitting elements arranged on the substrate to match the light incidence/emission sections of the light guides. The light receiving elements and the light emitting elements are arranged on the substrate by use of optical connectors. Coefficients of linear expansion and the rates of dimensional variation due to water absorption (or alternatively due to water absorption rates) of the light guides and the substrate here are substantially equalized.Type: GrantFiled: July 29, 2003Date of Patent: June 20, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Junji Okada, Takehiro Niitsu, Tsutomu Hamada, Hidenori Yamada, Hiroshi Oikawa
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Publication number: 20060115277Abstract: The present invention provides a method for reducing propagation errors in an optical communication system which includes an optical element and an optical transmission medium. In the present invention, a relative position of the optical element and an end face of the optical transmission medium, at which light emitted from the optical element is incident, is set to a (relative) position which is different from a relative position of the optical element and the end face of the optical transmission medium with which energy of light that is propagated is maximized. Then, light emitted from the optical element is propagated in multimode by the optical transmission medium.Type: ApplicationFiled: May 27, 2005Publication date: June 1, 2006Applicants: FUJI XEROX CO., LTD., HONDA TSUSHIN KOGYO CO., LTD.Inventors: Hidenori Yamada, Takehiro Niitsu, Shinya Kyozuka, Kazuhiro Suzuki, Tomo Baba, Shinobu Ozeki, Kouichiro Yoshimura, Atsunobu Sugimoto
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Patent number: 7039274Abstract: In a device of the present invention for allowing signal light to enter a light guide body using an optical fiber, a light guide body, which is constituted by dispersing particles for scattering the signal light in an optical medium, is selected as a light guide path which requires an area where a light diffusing function is performed just after incidence of the signal light. An optical connecting material intervenes between one end of the optical fiber from which the signal light is output and opposed one end surface of a particle dispersing light guide body and a desired diffusing function is obtained.Type: GrantFiled: October 30, 2003Date of Patent: May 2, 2006Assignees: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.Inventors: Junji Okada, Takehiro Niitsu, Tsutomu Hamada, Masao Funada, Hidenori Yamada, Shinya Kyozuka, Tomo Baba, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura
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Patent number: 6950572Abstract: A diffusion part diffuses an optical signal emitted from the end face of an optical fiber of an input light guide. An input reflection part reflects the optical signal diffused by the diffusion part in the direction of an output reflection part. A transparent medium guides the optical signal reflected by the input reflection part in the direction of the output reflection part. Output reflection parts reflect optical signals guided in the transparent media in the direction of optical fibers of output light guides. The optical signal reflected by the output reflection part is incident on the end face of the optical fiber and is transmitted over the output light guide.Type: GrantFiled: November 27, 2002Date of Patent: September 27, 2005Assignee: Fuji Xerox Co., Ltd.Inventors: Tsutomu Hamada, Junji Okada, Takehiro Niitsu, Hidenori Yamada, Hiroshi Oikawa, Mitsuo Shiraishi
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Publication number: 20050123231Abstract: In an optical wiring board, an optical components including a planar optical waveguide, a plurality of first optical fibers optically connected via a transmissive diffusion plate to a light incident face of the waveguide, and a plurality of second optical fibers optically connected to a light emitting face of the waveguide is placed on a support board. The optical component is sealed by a sealing member made of a resin.Type: ApplicationFiled: December 8, 2003Publication date: June 9, 2005Applicant: FUJI XEROX CO., LTD.Inventors: Takehiro Niitsu, Masao Funada, Kenichi Kobayashi, Hidenori Yamada, Takeshi Kamimura, Junji Okada, Shinya Kyozuka, Kazuhiro Sakai, Tomo Baba, Tsutomu Hamada, Masashi Hisada, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura
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Publication number: 20050105913Abstract: A transmission unit of a signal transmission device includes: a transmission-side detection unit that detects image information from an inputted electrical signal; a receiving unit that receives, from a reception unit, a status signal representing an arrival status of an outputted optical signal; and a control unit that controls an electrical-optical conversion unit on the basis of the detection result of the transmission-side detection unit and the status signal of the receiving unit so that the output of the optical signal is shut down in at least one of a case where image information is not included in an electrical signal and a case where an optical signal has not arrived.Type: ApplicationFiled: October 13, 2004Publication date: May 19, 2005Applicant: FUJI XEROX CO., LTD.Inventors: Shinobu Ozeki, Kenichi Kobayashi, Hidenori Yamada, Shinya Kyozuka, Takehiro Niitsu, Kazuhiro Suzuki, Tomo Baba, Osamu Takanashi
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Publication number: 20050100282Abstract: In a device of the present invention for allowing signal light to enter a light guide body using an optical fiber, a light guide body, which is constituted by dispersing particles for scattering the signal light in an optical medium, is selected as a light guide path which requires an area where a light diffusing function is performed just after incidence of the signal light. An optical connecting material intervenes between one end of the optical fiber from which the signal light is output and opposed one end surface of a particle dispersing light guide body and a desired diffusing function is obtained.Type: ApplicationFiled: October 30, 2003Publication date: May 12, 2005Applicants: FUJI XEROX CO., LTD., FUJI PHOTO FILM CO., LTD.Inventors: Junji Okada, Takehiro Niitsu, Tsutomu Hamada, Masao Funada, Hidenori Yamada, Shinya Kyozuka, Tomo Baba, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura
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Patent number: 6878925Abstract: A first optical wave guide 36 and a second optical wave guide 40 are connected to both sides of a planer optical waveguide 32, respectively. The other ends 36b, 40b of the first and second optical wave guides 36, 40 are extended over an upper surface 20 of an optical wiring circuit board 18. An electric wiring circuit 14 is connected to the other ends 36b, 40b of the first and second optical wave guides 36, 40, thereby constituting an optical wiring circuit 16. A plurality of optical wiring circuits 16 are superimposed on one another to thereby form an optical wiring circuits layered body 12. The electric wiring circuit 14 can be connected from one surface of the optical wiring circuit board 18, which makes it possible to facilitate the connection thereof.Type: GrantFiled: February 13, 2002Date of Patent: April 12, 2005Assignee: Fuji Xerox Co., Ltd.Inventors: Hidenori Yamada, Masao Funada, Takeshi Kamimura, Junji Okada, Shinya Kyozuka, Kazuhiro Sakai, Tsutomu Hamada, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura, Takehiro Niitsu, Tomo Baba, Masashi Hisada, Kenichi Kobayashi
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Publication number: 20040057731Abstract: In an optical transmission apparatus in which a plurality of nodes are optically connected to one another via an optical transmission path, a light signal which is coded so that a mixture ratio of 1 and 0 constituting data is made close to 50% is transmitted through the optical transmission path. When a light signal is not emitted from all of the nodes, a dummy signal which is an AC-like signal is emitted to the optical transmission path. Therefore, an optoelectric conversion section can be always set to an active state, and the signal recognizability can be prevented from being lowered.Type: ApplicationFiled: March 27, 2003Publication date: March 25, 2004Applicant: FUJI XEROX CO., LTD.Inventors: Shinobu Ozeki, Akira Toshima, Masao Funada, Kenichi Kobayashi, Hidenori Yamada, Takeshi Kamimura, Yoshihide Sato, Junji Okada, Takehiro Niitsu, Shinya Kyozuka, Kazuhiro Sakai, Kazuhiro Suzuki, Tomo Baba, Tsutomu Hamada, Masaru Kijima, Osamu Takanashi, Masaaki Miura, Osamu Ueno
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Publication number: 20030123803Abstract: A diffusion part diffuses an optical signal emitted from the end face of an optical fiber of an input light guide. An input reflection part reflects the optical signal diffused by the diffusion part in the direction of an output reflection part. A transparent medium guides the optical signal reflected by the input reflection part in the direction of the output reflection part. Output reflection parts reflect optical signals guided in the transparent media in the direction of optical fibers of output light guides. The optical signal reflected by the output reflection part is incident on the end face of the optical fiber and is transmitted over the output light guide.Type: ApplicationFiled: November 27, 2002Publication date: July 3, 2003Applicant: FUJI XEROX CO., LTD.Inventors: Tsutomu Hamada, Junji Okada, Takehiro Niitsu, Hidenori Yamada, Hiroshi Oikawa, Mitsuo Shiraishi
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Publication number: 20030002107Abstract: An optical bus 30 optically connects each board of a signal processing section 22 and each board of a transmission/reception section 40 for transmitting an optical signal output to the optical bus 30 by each board of the signal processing section 22 to each board of the transmission/reception section 40 in a non-block state. In contrast, the optical bus 30 transmits an optical signal output to the optical bus 30 by each board of the transmission/reception section 40 to each board of the signal processing section 22 in a non-block state.Type: ApplicationFiled: February 11, 2002Publication date: January 2, 2003Applicant: FUJI XEROX CO., LTD.Inventors: Tomo Baba, Masao Funada, Takeshi Kamimura, Hidenori Yamada, Junji Okada, Shinya Kyozuka, Kazuhiro Sakai, Tsutomu Hamada, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura, Takehiro Niitsu, Masashi Hisada, Kenichi Kobayashi, Akira Toshima
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Publication number: 20020162951Abstract: A first optical wave guide 36 and a second optical wave guide 40 are connected to both sides of a planer optical waveguide 32, respectively. The other ends 36b, 40b of the first and second optical wave guides 36, 40 are extended over an upper surface 20 of an optical wiring circuit board 18. An electric wiring circuit 14 is connected to the other ends 36b, 40b of the first and second optical wave guides 36, 40, thereby constituting an optical wiring circuit 16. A plurality of optical wiring circuits 16 are superimposed on one another to thereby form an optical wiring circuits layered body 12. The electric wiring circuit 14 can be connected from one surface of the optical wiring circuit board 18, which makes it possible to facilitate the connection thereof.Type: ApplicationFiled: February 13, 2002Publication date: November 7, 2002Applicant: FUJI XEROX CO., LTD.Inventors: Hidenori Yamada, Masao Funada, Takeshi Kamimura, Junji Okada, Shinya Kyozuka, Kazuhiro Sakai, Tsutomu Hamada, Shinobu Ozeki, Osamu Takanashi, Masaaki Miura, Takehiro Niitsu, Tomo Baba, Masashi Hisada, Kenichi Kobayashi
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Patent number: 6317404Abstract: Binary two-dimensional digital data can be recorded in an optical recording medium as holograms in such a way that a recording area is made sufficiently minute correspondingly to the two-dimensional digital data by adequately limiting the spread of signal light and reference light without causing loss of the data and a read error during reconstructing. Signal light of a binary two-dimensional digital data image is subjected to Fourier transform by a lens. There is disposed forwardly of an optical recording medium a shading material having a circular, semicircular, sectorial, or L-shape light transmission part 21 that allows transmission of only components of 0th to n-th (n=1, 2, or 3) orders. The signal light after Fourier transform and reference light are transmitted through the light transmission part 21 for irradiation to the optical recording medium and a Fourier transform hologram is recorded in the optical recording medium.Type: GrantFiled: August 2, 1999Date of Patent: November 13, 2001Assignee: Fuji Xerox Co., Ltd.Inventors: Katsunori Kawano, Mitsuhiro Ishibe, Tsutomu Ishii, Takehiro Niitsu, Kazuo Baba
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Patent number: 6285474Abstract: A method and an apparatus capable of filtering based on desired spatial frequency characteristics without loss of Fourier spectrum frequency components, and of matched filtering of high recognition capability without losing functions of data recording and reconstruction as well as high-speed transmission and retrieval features and mass storage capacity characteristic of a holographic memory. Fourier transformed object light with 0° polarization of a target image is stored as a hologram using reference light having a spatial polarization distribution such that a daughter wavelet on scale m has 90° polarization. The hologram is retrieved using the Fourier transformed object light with 0° polarization. The hologram yields diffracted light in the form of a spatial frequency component which corresponds to scale m and is polarized 90° with respect to the other spatial frequency components. A polarizing element is used to extract only the spatial frequency component corresponding to scale m.Type: GrantFiled: May 25, 2000Date of Patent: September 4, 2001Assignee: Fuji Xerox Co., Ltd.Inventors: Katsunori Kawano, Jiro Minabe, Takehiro Niitsu, Tsutomu Ishii, Yasunari Nishikata, Kazuo Baba
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Patent number: 5635949Abstract: Each pixel consists of an image electrode formed on a first insulating substrate, a ferroelectrlc material portion formed on the image electrode, a pixel electrode formed on the ferroelectric material layer, a scanning electrode formed on a second insulating substrate, and a liquid crystal portion disposed between the pixel electrode and the scanning electrode. When an input signal is written to the respective pixels, a liquid crystal portion of each of pixels selected for display is supplied with an effective voltage that makes a transmittance of the liquid crystal portion smaller than 50%.Type: GrantFiled: October 17, 1994Date of Patent: June 3, 1997Assignee: Fuji Xerox Co., Ltd.Inventors: Yoshiyuki Shiratsuki, Yoshinori Yamaguchi, Kazuhiro Hayashi, Takehiro Niitsu