Patents by Inventor Kazuhiro Sakai
Kazuhiro Sakai 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).
-
Publication number: 20110236292Abstract: A clean bench comprising a worktable on which polycrystalline silicon is placed, a box part which includes side plates to surround three sides except a front face of a working space above the worktable, and a ceiling plate which covers an upper side of the working space. Supplying holes are formed in the ceiling plate of the box part, which supply clean air onto an upper surface of the worktable. An ionizer is provided, which ionizes the clean air supplied from the supplying holes to the working space and removes static electricity on the worktable. Suction holes are formed in the side plate of the box part, which suction air from the working space.Type: ApplicationFiled: June 1, 2011Publication date: September 29, 2011Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuhiro Sakai, Yukiyasu Miyata
-
Patent number: 8023539Abstract: Provided is a method for driving a surface emitting semiconductor laser including an active region that generates light, a resonator structure disposed such that it sandwiches the active region, and a driving electrode that provides power to the active region. The surface emitting semiconductor laser has an internal resistance defined by voltage and current applied to the driving electrode. The method includes applying a modulation signal to the driving electrode, in which the modulation signal has a current amplitude defined by a first current value and a second current value that is greater than the first current value. The modulation signal is in a negative gradient region in which the internal resistance decreases in contrast to the increase of the current.Type: GrantFiled: February 25, 2008Date of Patent: September 20, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Osamu Ueno, Akira Sakamoto, Kazuhiro Sakai, Hideo Nakayama, Akemi Murakami
-
Patent number: 8019188Abstract: An optical transmission apparatus includes a light receiving element and an optical waveguide. The light receiving element receives light. The optical waveguide includes a core, a clad and a concave portion. The clad is adjacent to the core. The concave portion is formed in a portion of the core or a portion of the clad and diffuses the light. The portion of the core or the portion of the clad emits the light toward the light receiving element.Type: GrantFiled: May 20, 2009Date of Patent: September 13, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Naotaka Mukoyama, Kazuhiro Sakai, Hiroki Sugibuchi, Akira Sakamoto
-
Patent number: 7998079Abstract: A biosensor senses pulse wave data of a user. The biosensor stores relation information, which indicates a relationship between recommended bedtime data and sleep-affecting activity data. The relationship between the recommended bedtime data and the sleep-affecting activity data is determined in view of at least one of previously sensed pulse wave data of the user and model pulse wave data. The biosensor receives at least one sleep-affecting activity value from the user. The biosensor computes recommended bedtime information based on the at least one sleep-affecting activity value in view of the relation information. The biosensor gives notification to the user based on the recommended bedtime information.Type: GrantFiled: April 25, 2006Date of Patent: August 16, 2011Assignee: DENSO CORPORATIONInventors: Fumiya Nagai, Katsuyoshi Nishii, Kazuhiro Sakai
-
Patent number: 7976599Abstract: A clean bench comprising a worktable on which polycrystalline silicon is placed, a box part which includes side plates to surround three sides except a front face of a working space above the worktable, and a ceiling plate which covers an upper side of the working space. Supplying holes are formed in the ceiling plate of the box part, which supply clean air onto an upper surface of the worktable. An ionizer is provided, which ionizes the clean air supplied from the supplying holes to the working space and removes static electricity on the worktable. Suction holes are formed in the side plate of the box part, which suction air from the working space.Type: GrantFiled: September 2, 2008Date of Patent: July 12, 2011Assignee: Mitsubishi Materials CorporationInventors: Kazuhiro Sakai, Yukiyasu Miyata
-
Publication number: 20110120506Abstract: Disclosed is a polycrystalline silicon washing apparatus that sequentially immerses polycrystalline silicon into a plurality of acid baths each of which is filled with an acid to wash the polycrystalline silicon. The temperatures of the acids in the acid baths are set such that the temperature of the acid in a later acid bath of adjacent acid baths is equal to or lower than that of a former acid bath and the temperature of the acid in the last acid bath is lower than that of the acid in the first acid bath. Each of the acid baths is provided with a temperature adjusting unit that controls the temperature of the acid at a constant value.Type: ApplicationFiled: February 2, 2011Publication date: May 26, 2011Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuhiro Sakai, Tetsuya Atsumi, Yukiyasu Miyata
-
Patent number: 7924861Abstract: 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: GrantFiled: November 15, 2005Date of Patent: April 12, 2011Assignee: 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
-
Patent number: 7905963Abstract: Disclosed is a polycrystalline silicon washing apparatus that sequentially immerses polycrystalline silicon into a plurality of acid baths each of which is filled with an acid to wash the polycrystalline silicon. The temperatures of the acids in the acid baths are set such that the temperature of the acid in a later acid bath of adjacent acid baths is equal to or lower than that of a former acid bath and the temperature of the acid in the last acid bath is lower than that of the acid in the first acid bath. Each of the acid baths is provided with a temperature adjusting unit that controls the temperature of the acid at a constant value.Type: GrantFiled: November 25, 2009Date of Patent: March 15, 2011Assignee: Mitsubishi Materials CorporationInventors: Kazuhiro Sakai, Tetsuya Atsumi, Yukiyasu Miyata
-
Patent number: 7883278Abstract: An optical module includes: a plurality of leads arranged in at least two lines, at least portions of the plurality of the leads being mounted on a circuit board; an optical semiconductor for emitting or receiving an optical signal; and a circuit portion connected to the optical semiconductor, for transmitting a pair of differential signals to or receiving a pair of differential signals from the circuit board through a pair of differential signal leads among the plurality of the leads. The pair of the differential signal leads are provided adjacent and in parallel to each other in one of the at least two lines.Type: GrantFiled: February 17, 2006Date of Patent: February 8, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Osamu Ueno, Junji Okada, Kazuhiro Sakai, Osamu Ohtani
-
Publication number: 20100228139Abstract: In a living body inspection apparatus to inspect RLS (Restless Legs Syndrome), a pulse interval is obtained from a pulse wave signal, thereby performing a frequency analysis of the obtained pulse interval using COM. From a result of the frequency analysis, the low frequency components ranging from 0.04 to 0.15 Hz and the high frequency components ranging from 0.15 to 0.4 Hz are extracted. As an index posterior to an age amendment, low frequency components (LF)/high frequency components (HF) is obtained, for instance. It is then determined whether LF/HF is equal to or greater than a predetermined determination value indicating RLS. For example, it is determined whether LF/HF is equal to or greater than 0.65, which suspects RLS. It is determined whether a signal is accurately calculated which indicates an activity of autonomic nerve. A state of RLS is determined using LF/HF.Type: ApplicationFiled: March 4, 2010Publication date: September 9, 2010Applicants: DENSO CORPORATION, Toshiaki ShiomiInventors: Shinji NANBA, Kazuhiro Sakai, Katsuyoshi Nishii, Toshiaki Shiomi
-
Publication number: 20100185101Abstract: A biological condition evaluation apparatus determines a symptom of a heart abnormality based on at least one index calculated from a heartbeat interval and/or a pulse interval. The apparatus determines whether it is in a referential period where an amount of change in the index is comparatively small. The apparatus determines whether a plurality of conditions are satisfied or not in an evaluation period set after the referential period. One condition is that an amount of change in the index in the evaluation period is greater than that observed during the referential period. Another condition is that a rate of change in the index is equal to or greater than a predetermined threshold value. The apparatus determines that there is a symptom of a heart abnormality, when both the conditions are satisfied.Type: ApplicationFiled: January 18, 2010Publication date: July 22, 2010Applicants: DENSO CORPORATION, NIPPON MEDICAL SCHOOL FOUNDATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuhiro SAKAI, Shinji NANBA, Takao KATOH, Motohisa OSAKA, Yoshitaka FUWAMOTO
-
Patent number: 7751660Abstract: An optoelectric composite wiring module includes: a pair of optical circuit sections, each including an optical element that performs photoelectric conversion and that receives or outputs an optical signal; an optical wiring section including an optical wiring that transmit the optical signal between the pair of optical circuit sections; and an electric wiring section including an electric wiring that transmits an electric power or electric signal that is not related to the photoelectric conversion, the electric wiring section including a first portion being stacked above the optical wiring section and a second portion being separated from and not stacked above each of the pair of optical circuit sections.Type: GrantFiled: May 23, 2007Date of Patent: July 6, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Osamu Ueno, Kazuhiro Sakai, Shinya Kyozuka, Osamu Ohtani, Akira Tateishi
-
Publication number: 20100132746Abstract: Disclosed is a polycrystalline silicon washing apparatus that sequentially immerses polycrystalline silicon into a plurality of acid baths each of which is filled with an acid to wash the polycrystalline silicon. The temperatures of the acids in the acid baths are set such that the temperature of the acid in a later acid bath of adjacent acid baths is equal to or lower than that of a former acid bath and the temperature of the acid in the last acid bath is lower than that of the acid in the first acid bath. Each of the acid baths is provided with a temperature adjusting unit that controls the temperature of the acid at a constant value.Type: ApplicationFiled: November 25, 2009Publication date: June 3, 2010Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuhiro Sakai, Tetsuya Atsumi, Yukiyasu Miyata
-
Publication number: 20100129038Abstract: An optical transmission apparatus includes a light receiving element and an optical waveguide. The light receiving element receives light. The optical waveguide includes a core, a clad and a concave portion. The clad is adjacent to the core. The concave portion is formed in a portion of the core or a portion of the clad and diffuses the light. The portion of the core or the portion of the clad emits the light toward the light receiving element.Type: ApplicationFiled: May 20, 2009Publication date: May 27, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Naotaka MUKOYAMA, Kazuhiro SAKAI, Hiroki SUGIBUCHI, Akira SAKAMOTO
-
Patent number: 7715728Abstract: An optical transmitter includes a light-emitting element, a driving circuit, a temperature detection unit, a storage device and a control circuit. The driving circuit causes, based on an input signal, the light-emitting element to emit an optical signal having a pulse shape. The temperature detection unit detects an ambient temperature of the light-emitting element. The storage device stores temperature characteristics information of the light-emitting element. The control circuit controls the driving circuit based on the ambient temperature detected by the temperature detection unit and the temperature characteristic information stored in the storage device, so that an extinction ratio of the optical signal having the pulse shape becomes substantially constant.Type: GrantFiled: October 16, 2006Date of Patent: May 11, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Masaru Kijima, Kazuhiro Sakai, Tsutomu Hamada, Yoshihide Sato
-
Publication number: 20100104239Abstract: An optical transmission apparatus includes an optical element that has at least one of a light emitting part and a light receiving part on a surface opposed to a mounting surface of the optical element, an optical waveguide that is made of a polymer material, and has an optical path deflecting part in a through hole or an opening, wherein the optical path deflecting part deflects an optical path of the optical with respect to the at least one of the light emitting part and the light receiving part of the optical element, and a substrate that has a mounting region on which the mounting surface of the optical element is mounted, and a plurality of waveguide holding parts, each holding the optical waveguide so that the optical path deflecting part of the optical waveguide is arranged opposite to the at least one of the light emitting part and the light receiving part of the optical element.Type: ApplicationFiled: February 23, 2009Publication date: April 29, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Junji Okada, Ryoji Ishii, Tomoaki Kojima, Kazuhiro Sakai
-
Publication number: 20090245716Abstract: An optical communication device has: an optical waveguide device having an optical waveguide core that guides light, a cladding portion enveloping the optical waveguide core, a mirror surface structured at an end surface of the cladding portion and the optical waveguide core, and changing an optical path of light that passes through the optical waveguide core, and an electrically-conductive film formed so as to cover the mirror surface; a reference potential member at which a predetermined potential is ensured; and a connecting member electrically connecting the electrically-conductive film and the reference potential member.Type: ApplicationFiled: September 17, 2008Publication date: October 1, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Tomoaki Kojima, Kazuhiro Sakai, Osamu Ueno, Shinya Kyozuka, Akira Sakamoto
-
Publication number: 20090196600Abstract: Provided is an optical transmission module that includes: a semiconductor light emitting element for emitting laser light; a first driving unit for providing a first driving current to the semiconductor light emitting element; a switching unit connected between the semiconductor light emitting element and the first driving unit; and a package for accommodating the semiconductor light emitting element, the first driving unit, and the switching unit. The switching unit includes a first input for receiving a first driving current outputted from at least from the first driving unit, a second input for receiving a second driving current for testing the semiconductor light emitting element, and an output connected to the semiconductor light emitting element. The switching unit connects the first input or the second input to the output.Type: ApplicationFiled: December 3, 2008Publication date: August 6, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Akira Sakamoto, Kazuhiro Sakai, Osamu Ueno
-
Publication number: 20090180580Abstract: For signals to be transmitted through a signal transmission path constituted by a relay device group for relay for each set of a plurality of channels, a timing adjustment unit is provided in both or one of a receiver-side LSI and a transmitter-side LSI for each set of a plurality of channels transmitted through the relay device group for relay so that the signals can be transmitted with accurate timing. In addition, the timing adjustment unit can adjust the timing for signals transmitted through each relay device group, the timing in one receiver-side LSI in signal transmission through a plurality of relay device groups, and the timing in one-to-many signal transmission in which signals are transmitted from one transmitter-side LSI to a plurality of receiver-side LSIs.Type: ApplicationFiled: March 10, 2009Publication date: July 16, 2009Applicant: Fuji Xerox Co., Ltd.Inventors: Kazuhiro Sakai, Kazuhiro Suzuki, Tomo Baba, Tsutomu Hamada, Shinobu Ozeki, Masaru Kijima, Masaaki Miura, Takeshi Kamimura, Yoshihide Sato
-
Patent number: 7522684Abstract: For signals to be transmitted through a signal transmission path constituted by a relay device group for relay for each set of a plurality of channels, a timing adjustment unit is provided in both or one of a receiver-side LSI and a transmitter-side LSI for each set of a plurality of channels transmitted through the relay device group for relay so that the signals can be transmitted with accurate timing. In addition, the timing adjustment unit can adjust the timing for signals transmitted through each relay device group, the timing in one receiver-side LSI in signal transmission through a plurality of relay device groups, and the timing in one-to-many signal transmission in which signals are transmitted from one transmitter-side LSI to a plurality of receiver-side LSIs.Type: GrantFiled: March 27, 2003Date of Patent: April 21, 2009Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuhiro Sakai, Kazuhiro Suzuki, Tomo Baba, Tsutomu Hamada, Shinobu Ozeki, Masaru Kijima, Masaaki Miura, Takeshi Kamimura, Yoshihide Sato