Patents by Inventor Masao Funada
Masao Funada 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).
-
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
-
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
-
Publication number: 20040042449Abstract: A signal transmission system has a master node and plural slave nodes performing data transmission with the master node. The master node has a serial-to-parallel converter for converting a serial data signal from each slave node into a parallel data signal. Each slave node has a transmission aligner for performing word alignment processing upon a parallel data signals, and a parallel-to-serial converter for converting the parallel data signal subjected to the word alignment processing by the transmission aligner into a serial data signal, and outputting the serial data signal to the master node.Type: ApplicationFiled: March 27, 2003Publication date: March 4, 2004Applicant: FUJI XEROX CO., LTD.Inventors: Takeshi Kamimura, Kazuhiro Suzuki, Kazuhiro Sakai, Tsutomu Hamada, Tomo Baba, Shinobu Ozeki, Masaru Kijima, Masaaki Miura, Osamu Ueno, Yoshihide Sato, Masao Funada
-
Patent number: 6651139Abstract: The invention relates to a multiprocessor system having plural processors and an optical bus shared by the plural processors, and intends to simplify the cache control, reduce the volume of hardware, and shorten the memory access processing time. For this purpose, the multiprocessor system of the invention includes a shared memory, a cache memory connected to the shared memory, an optical bus connected to the cache memory, and plural processors connected to the optical bus, which access to the cache memory through the optical bus.Type: GrantFiled: March 3, 2000Date of Patent: November 18, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Shinobu Ozeki, Takeshi Kamimura, Kenichi Kobayashi, Kazuhiro Sakai, Tsutomu Hamada, Masao Funada, Hiroshi Fujimagari
-
Patent number: 6634812Abstract: An optical bus system comprising an optical bus is furnished, along two opposed edges, with a plurality of signal light input/output portions for inputting and outputting signal light to and from the bus. Any one of the signal light input/output portions on one edge of the bus inputs signal light thereto and propagates the light to the opposite edge at which another signal light input/output portion outputs the propagated signal light from the bus. The system also comprises a plurality of light emitting/receiving circuits corresponding to the signal light input/output portions. Each light emitting/receiving circuit has a signal light sending unit and a signal light receiving unit. The signal light sending unit generates signal light and sends the generated signal light into the optical bus through the corresponding signal light input/output portion. The signal light receiving unit acquires a received light signal upon receipt of the signal light output by the corresponding signal light input/output portion.Type: GrantFiled: August 30, 2001Date of Patent: October 21, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Shinobu Ozeki, Tsutomu Hamada, Hiroki Ishida, Masaki Hirota, Kazuhiro Sakai, Kenichi Kobayashi, Masao Funada, Hiroshi Fujimagari
-
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
-
Patent number: 6493784Abstract: The present invention provides a multiple bus control device and others which can also be applied to access control by a signal having a directional propagation property for implementing various communication between/among modules. Each of plural modules makes a request for communication to a multiple bus control device by sending communication request information for specifying one or more communication partner modules to the multiple bus control device. The multiple bus control device checks an idle state of a module to be communicated and an idle channel in a multiple bus based upon received communication request information and permits communication between a module which sends communication request information using the idle channel and a communication partner module specified in the communication request information.Type: GrantFiled: December 7, 1999Date of Patent: December 10, 2002Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Kamimura, Shinobu Ozeki, Kazuhiro Sakai, Kenichi Kobayashi, Masao Funada, Hiroshi Fujimagari
-
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
-
Publication number: 20020093677Abstract: A multifunction system has advanced functions and high speed capability and is excellent in expandability. The multifunction system includes a controller, an IIT, an IOT, and a light distributing device. For a print job, print data outputted from the controller is converted into optical signals, which enter a light distributing device and are transmitted to the IOT of the emission side. The IOT prints the received data onto a printer. For a copy job, copy data outputted from IIT is converted into optical signals, which enter the light distributing device, and are transmitted to the IOT of the emission side. For a scan job, scan data outputted from the scanner is converted into optical signals, which enter the light distributing device, and are transmitted to the controller of the emission side. The controller processes the received data.Type: ApplicationFiled: May 29, 2001Publication date: July 18, 2002Applicant: FUJI XEROX CO., LTD.Inventors: Shinobu Ozeki, Tsutomu Hamada, Junji Okada, Masao Funada, Takeshi Kamimura, Hidenori Yamada, Kazuhiro Sakai, Shinya Kyozuka, Hiroki Ishida, Osamu Takanashi, Masaaki Miura, Kenichi Kobayashi, Tsuyoshi Yaguchi, Kazuhiro Hama, Toshiki Matsui, Yasuhiro Arai, Hirotaka Mori
-
Patent number: 6366375Abstract: An optical-signal transmission apparatus and method for optical-signal transmission, or a signal processing apparatus for signal processing including optical-signal transmission. A number of terminals (circuit boards and the like) are connected, and communication can be freely performed among the terminals. A plurality of transmission nodes input optical signals having different light intensity levels into an optical transmission medium. A desired signal is separated and extracted from a multiplex signal where these optical signals transmitted from a reception node are overlaid.Type: GrantFiled: November 5, 1998Date of Patent: April 2, 2002Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuhiro Sakai, Tsutomu Hamada, Shinobu Ozeki, Masaki Hirota, Shinya Kyouzuka, Kenichi Kobayashi, Hiroki Ishida, Hiroshi Fujimagari, Masao Funada, Takashi Ozawa
-
Publication number: 20020012140Abstract: An optical bus system comprising an optical bus is furnished, along two opposed edges, with a plurality of signal light input/output portions for inputting and outputting signal light to and from the bus. Any one of the signal light input/output portions on one edge of the bus inputs signal light thereto and propagates the light to the opposite edge at which another signal light input/output portion outputs the propagated signal light from the bus. The system also comprises a plurality of light emitting/receiving circuits corresponding to the signal light input/output portions. Each light emitting/receiving circuit has a signal light sending unit and a signal light receiving unit. The signal light sending unit generates signal light and sends the generated signal light into the optical bus through the corresponding signal light input/output portion. The signal light receiving unit acquires a received light signal upon receipt of the signal light output by the corresponding signal light input/output portion.Type: ApplicationFiled: August 30, 2001Publication date: January 31, 2002Applicant: FUJI XEROX CO., LTD.Inventors: Shinobu Ozeki, Tsutomu Hamada, Hiroki Ishida, Masaki Hirota, Kazuhiro Sakai, Kenichi Kobayashi, Masao Funada, Hiroshi Fujimagari
-
Patent number: 6317242Abstract: An optical bus system comprising an optical bus is furnished, along two opposed edges, with a plurality of signal light input/output portions for inputting and outputting signal light to and from the bus. Any one of the signal light input/output portions on one edge of the bus inputs signal light thereto and propagates the light to the opposite edge at which another signal light input/output portion outputs the propagated signal light from the bus. The system also comprises a plurality of light emitting/receiving circuits corresponding to the signal light input/output portions. Each light emitting/receiving circuit has a signal light sending unit and a signal light receiving unit. The signal light sending unit generates signal light and sends the generated signal light into the optical bus through the corresponding signal light input/output portion. The signal light receiving unit acquires a received light signal upon receipt of the signal light output by the corresponding signal light input/output portion.Type: GrantFiled: December 29, 1998Date of Patent: November 13, 2001Assignee: Fuji Xerox Co., Ltd.Inventors: Shinobu Ozeki, Tsutomu Hamada, Hiroki Ishida, Masaki Hirota, Kazuhiro Sakai, Kenichi Kobayashi, Masao Funada, Hiroshi Fujimagari
-
Publication number: 20010023474Abstract: The present invention suppresses a data writing speed in mirroring and increases expandability. For a write request from a host, a disk controller stores write data in cache memory, and then transforms it into optical signals by a light emitting apparatus and sends them to an optical bus. The signal light inputted to the optical bus is broadcast-transmitted by the optical bus and read into disk drives simultaneously through a light receiving apparatus. This suppresses reduction in a data writing speed in mirroring and increases expandability.Type: ApplicationFiled: December 1, 2000Publication date: September 20, 2001Applicant: FUJI XEROX CO., LTDInventors: Shinya Kyozuka, Tsutomu Hamada, Takeshi Kamimura, Masao Funada
-
Patent number: 6233339Abstract: According to the present invention, piracy of secret data is prevented without an attack detecting circuit or data deleting circuit. In a secret data processing unit, a cell contains fluid in a sealed space. Code generators arranged in the sealed space receive a code generation request to generate codes specified by the pressure value of the fluid. A key generator disposed in the sealed space generates encryption keys/decryption keys specified by the generated codes. An encryptor/decryptor also disposed in the sealed space receives requests for secret data encryption/requests for encrypted secret data decryption, and outputs code generation requests to the code generator to encrypt the secret data/decrypt the encrypted secret data by using the generated encryption key/decryption key. Both codes and encryption keys/decryption keys generated and used, are not statically stored in the cryptographic processing unit.Type: GrantFiled: October 23, 1997Date of Patent: May 15, 2001Assignee: Fuji Xerox Co., Ltd.Inventors: Kenji Kawano, Masahiro Taguchi, Masaki Hirota, Junji Okada, Masao Funada, Takashi Ozawa
-
Patent number: 6172783Abstract: An optical bus for propagating signal light comprises a beam dividing portion consisting of a plurality of diffraction surfaces for diffracting signal light input from a signal light input portion and directing it toward a plurality of signal light output portions, which are arranged in a mosaic manner. A signal processor uses the above optical bus to carry out signal processing including the transmission and reception of a signal to improve optical energy use efficiency, thereby reducing power consumption and constructing a system having extendability.Type: GrantFiled: October 20, 1997Date of Patent: January 9, 2001Assignee: Fuji Xerox Co., Ltd.Inventors: Masao Funada, Masaki Hirota, Junji Okada, Kazuhiro Sakai, Takekazu Shiotani, Tsutomu Hamada, Takashi Ozawa
-
Patent number: 6126432Abstract: An optical transmission line is formed and thereafter solidified using an optical transmission line forming material in the fluid condition. The optical transmission line formed between optical transmission terminals assures higher reliability and never generates disconnection or internal stress therein.Type: GrantFiled: October 2, 1998Date of Patent: October 3, 2000Assignee: Fuji Xerox Co., Ltd.Inventors: Junji Okada, Masaki Hirota, Masahiro Taguchi, Kenji Kawano, Masao Funada, Takashi Ozawa
-
Patent number: 6065881Abstract: An optical transmission line is formed and thereafter solidified using an optical transmission line forming material in the fluid condition. The optical transmission line formed between optical transmission terminals assures higher reliability and never generates disconnection or internal stress therein.Type: GrantFiled: October 2, 1998Date of Patent: May 23, 2000Assignee: Fuji Xerox Co., Ltd.Inventors: Junji Okada, Masaki Hirota, Masahiro Taguchi, Kenji Kawano, Masao Funada, Takashi Ozawa
-
Patent number: 5995262Abstract: A signal transmission bus comprising a plurality of optical transmission layers and optical isolation layers stacked alternately. Each of the optical transmission layers has signal light input thereinto and propagating the input signal light diffusedly. Each of the optical isolation layers prevents the mixing of the signal light between any two adjacent optical transmission layers. At least one of the optical isolation layers comprises electrical wiring for transmitting electrical signals.Type: GrantFiled: December 3, 1996Date of Patent: November 30, 1999Assignee: Fuji Xerox Co., Ltd.Inventors: Masaki Hirota, Kenji Kawano, Masahiro Taguchi, Junji Okada, Masao Funada, Takashi Ozawa
-
Patent number: 5987198Abstract: An optical bus production method for producing an optical bus having an improved transmission efficiency while preventing a data transmission failure. More specifically, the optical bus is produced by preparing first sheets that serve as a light transmission layer, a clad layer is formed on both front and rear sides of each of the first sheets and a second sheet is inserted, is prepared separately from the first sheet and serves as a clearance layer between the first sheets having the clad layer. The resulting optical bus includes a plurality of light transmission paths, each consisting of a light transmission layer and clad layers sandwiching the light transmission layer, and clearance layers for specifying the interval between the light transmission paths, each clearance layer being interposed between adjacent light transmission paths.Type: GrantFiled: December 15, 1997Date of Patent: November 16, 1999Assignee: Fuji Xerox Co., Ltd.Inventors: Masaki Hirota, Tsutomu Hamada, Takekazu Shiotani, Kazuhiro Sakai, Junji Okada, Masao Funada, Takashi Ozawa
-
Patent number: 5955010Abstract: An optical transmission line is formed and thereafter solidified using an optical transmission line forming material in the fluid condition. The optical transmission line formed between optical transmission terminals assures higher reliability and never generates disconnection or internal stress therein.Type: GrantFiled: December 27, 1996Date of Patent: September 21, 1999Assignee: Fuji Xerox Co., Ltd.Inventors: Junji Okada, Masaki Hirota, Masahiro Taguchi, Kenji Kawano, Masao Funada, Takashi Ozawa