Patents by Inventor Tetsuya Kojima
Tetsuya Kojima 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: 20130194852Abstract: In a power converting apparatus having a plurality of phases on an AC side and configured to perform conversion between DC power and AC power, a current detector detects currents flowing through a DC source line through which a plurality of phase currents commonly flow. A control unit sets a current detection period and a succeeding current control period in each successive control cycle. Using first gate signals based on reference gate signals for PWM control, the control unit calculates values of the individual phase currents from the first gate signals and the detected currents during the current detection period. Then, during the current control period, the control unit performs PWM control using phase voltage commands generated by correcting phase voltage target values so as to cancel out voltage errors that occur during the current detection period.Type: ApplicationFiled: September 12, 2012Publication date: August 1, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kosuke NAKANO, Tetsuya KOJIMA
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Publication number: 20130169902Abstract: According to one embodiment, a display includes an array substrate including pixel electrodes arranged in a matrix, and alignment film arranged on the pixel electrodes, a countersubstrate provided with counterelectrodes opposed to the pixel electrodes, and an OCB-mode liquid crystal layer held between the array substrate and the countersubstrate. The alignment film and has been subjected to alignment processing in a predetermined direction. Each of the pixel electrodes includes at least one notch defined by continuous edge sides each of which intersects the predetermined direction, and the continuous edge sides include edge sides extending in directions intersecting gate lines and signal lines.Type: ApplicationFiled: December 21, 2012Publication date: July 4, 2013Inventors: Tetsuya KOJIMA, Toshiyuki HIGANO, Daiichi SUZUKI
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Patent number: 8350507Abstract: A rotary electric machine controller including a current detector detecting rotary electric machine currents generated in a rotary electric machine, a position estimation mechanism outputting an estimated position in accordance with the rotary electric machine currents; a controller outputting voltage commands in accordance with the estimated position; a pulse-width modulator outputting logic signals which are pulse-width modulated in accordance with the voltage commands and with a switching cycle used for pulse-width modulation control; and a voltage application mechanism applying AC voltages for driving the rotary electric machine in accordance with the logic signals. The voltage commands output by the controller are obtained by superimposing, on fundamental voltages for driving the rotary electric machine, position detection voltages which each have a cycle equal to m times of the switching cycle and which are different in phase among respective phases.Type: GrantFiled: May 9, 2008Date of Patent: January 8, 2013Assignee: Mitsubishi Electric CorporationInventors: Masato Ito, Yoshihiko Kimpara, Tetsuya Kojima
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Patent number: 8296478Abstract: An efficient transfer of data including a plurality of data sections is achieved. In a data transfer system including a first DMA 1142 of a channel control unit 11 and an MP 122 of a processor unit 12 that sets a transfer parameter in the first DMA 1142, while CKD format data 1400 is transferred from a cache memory 14 to a memory 113 of the channel control unit 11, the MP 122 acquires a C field 1411 from the cache memory 14 and sets a transfer parameter in the first DMA 1142 on the basis of the acquired C field 1411, the transfer parameter having attached thereto the C field 1411 and being used for transferring a K field 1412 from the cache memory 14 to the memory 113. The first DMA 1142 retrieves the C field 1411 attached to the transfer parameter, stores the C field 1411 in the memory 113, and transfers the K field from the cache memory 14 to the memory 113 according to the transfer parameter.Type: GrantFiled: June 24, 2010Date of Patent: October 23, 2012Assignee: Hitachi, Ltd.Inventors: Osamu Torigoe, Tetsuya Kojima
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Patent number: 8284363Abstract: A device includes a substrate including a first insulating substrate, a first electrode located on the first insulating substrate, and a second electrode located between the first insulating substrate and the first electrode via an insulating underlayer interposed between the second and the first electrode, a substrate including a second insulating substrate and a third electrode on the second insulating substrate, a liquid crystal layer which is held between the first and the third electrode and which exhibits a transition from a first state to a second state in an initializing process, and a voltage supply unit which supplies, a first voltage to the first and the second electrodes and a second voltage to the third electrode, wherein the first electrode includes a transition nucleus forming section which forms nuclei of the transition in the liquid crystal layer on the basis of the respective voltages supplied to the respective electrodes.Type: GrantFiled: September 24, 2008Date of Patent: October 9, 2012Assignees: Japan Display Central Inc., Kabushiki Kaisha ToshibaInventors: Kenji Nakao, Hirofumi Wakemoto, Tetsuya Kojima, Tetsuo Fukami, Yuko Kizu, Rei Hasegawa, Yukio Kizaki
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Publication number: 20120232391Abstract: An ultrasound diagnostic apparatus includes a plurality ultrasound probes, an apparatus body for producing an ultrasound image based on the reception data obtained by one of the ultrasound probes, a connection selector for selectively switching a connection between the ultrasound probes and the apparatus body, an interruption detector for detecting interruption of ultrasound examination, and a controller for causing the apparatus body to display a selection screen for selecting one of the ultrasound probes to be subsequently used when the interruption detector detects interruption of ultrasound examination, wherein when an operator selects one of the ultrasound probes to be subsequently used from the displayed selection screen, the controller controls the connection selector to connect the selected ultrasound probe with the apparatus body.Type: ApplicationFiled: January 31, 2012Publication date: September 13, 2012Applicant: FUJIFILM CORPORATIONInventor: Tetsuya KOJIMA
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Patent number: 8218115Abstract: After supply of power, a liquid crystal display device performing transition from a first state to a second state different from the first state before a display operation is provided with a transition nucleus forming portion around a pixel electrode or inside. The transition nucleus forming portion performs transition to the second state prior to other portion during a transition drive period. The transition nucleus forming portion of the pixel electrode has an edge portion formed into a reverse taper shape decreasing in its thickness toward the tip end. Therefore, transition from a splay alignment to a bend alignment is performed with simple element and drive circuit configuration in all pixels.Type: GrantFiled: September 17, 2008Date of Patent: July 10, 2012Assignees: Kabushiki Kaisha Toshiba, Toshiba Matsushita Display Technology Co., Ltd.Inventors: Yukio Kizaki, Rei Hasegawa, Yuko Kizu, Hirofumi Wakemoto, Kenji Nakao, Tetsuo Fukami, Tetsuya Kojima
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Patent number: 8144099Abstract: There is provided an liquid crystal display apparatus configured to invert a pixel voltage and a common voltage on a frame to frame basis while setting a transition voltage Vt in such a manner that the polarity of the pixel voltage to be applied to a pixel electrode of each display pixel and the polarity of the common voltage to be applied to a common electrode of a common substrate are differentiated.Type: GrantFiled: February 15, 2008Date of Patent: March 27, 2012Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Tetsuya Kojima, Tetsuo Fukami, Kazuhiro Nishiyama, Kenji Nakao
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Patent number: 8139712Abstract: A radiation imaging apparatus in which early recognition of breast cancer can be made possible by acquiring both a radiation tomographic image that accurately displays a tumor mass and a radiation planar image that accurately displays calcification. The apparatus includes an image processing unit for generating a tomographic image signal in a first imaging mode and generating a planar image signal in a second imaging mode, a computing unit for computing an imaging direction for obtaining a radiation planar image based on a location designated in a radiation tomographic image, and a control unit for controlling a rotational driving device and a radiation generating unit to obtain the radiation tomographic image in the first imaging mode, and controlling the rotational driving device according to the computed imaging direction and controlling the radiation generating unit to obtain the radiation planar image in the second imaging mode.Type: GrantFiled: September 14, 2009Date of Patent: March 20, 2012Assignee: Fujifilm CorporationInventor: Tetsuya Kojima
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Publication number: 20120057381Abstract: There is provided an electric-power conversion apparatus including a chopper circuit; a current sense resistor that detects the output current of the chopper circuit; a differential detection circuit that outputs, as a differential detection signal (vo), the electric potential difference across the current sense resistor; and a calculation means that corrects the differential detection signal (vo) from the differential detection circuit by use of a control signal (D1) for the chopper circuit so as to calculate the output current (i0) of the chopper circuit.Type: ApplicationFiled: March 3, 2011Publication date: March 8, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshihiko KIMPARA, Takayuki KIFUKU, Tetsuya KOJIMA, Tatsuya MORI
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Publication number: 20120049778Abstract: A power converting apparatus includes a timing signal generator and a phase determination signal generator provided in an ON/OFF signal generating unit as well as a detected current correction unit. On the basis of timing signals ts1, . . . and phase determination signals ph1, . . . , the power converting apparatus determines detected current values and phases of the detected current values fed from a DC bus current sensor at timings set in accordance with the timing signals and corrects the detected current values idc1, . . . for the individual phases obtained at the individual timings during PWM cycles to represent values which would be obtained at reference timing t0 to thereby reduce errors caused by differences in the current detecting timings for the individual phases.Type: ApplicationFiled: February 9, 2010Publication date: March 1, 2012Applicant: Mitsubishi Electric CorporationInventors: Tetsuya Kojima, Yoshihiko Kinpara
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Publication number: 20120036286Abstract: An efficient transfer of data including a plurality of data sections is achieved. In a data transfer system including a first DMA 1142 of a channel control unit 11 and an MP 122 of a processor unit 12 that sets a transfer parameter in the first DMA 1142, while CKD format data 1400 is transferred from a cache memory 14 to a memory 113 of the channel control unit 11, the MP 122 acquires a C field 1411 from the cache memory 14 and sets a transfer parameter in the first DMA 1142 on the basis of the acquired C field 1411, the transfer parameter having attached thereto the C field 1411 and being used for transferring a K field 1412 from the cache memory 14 to the memory 113. The first DMA 1142 retrieves the C field 1411 attached to the transfer parameter, stores the C field 1411 in the memory 113, and transfers the K field from the cache memory 14 to the memory 113 according to the transfer parameter.Type: ApplicationFiled: June 24, 2010Publication date: February 9, 2012Inventors: Osamu Torigoe, Tetsuya Kojima
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Patent number: 8041850Abstract: A channel control unit of a storage apparatus is provided with: a variable-length DMA (Direct Memory Access) that performs data transfer of variable-length data sent to or received from the host computer in accordance with an I/O request; a fixed-length DMA that performs data transfer of fixed-length data to and from the cache memory; and a buffer intervening between the variable-length DMA and the fixed-length DMA. In performing the data transfer of the fixed-length data to the cache memory, the fixed-length DMA divides the variable-length data into multiple sets of the fixed-length data each having a data size equivalent to a unit size of data managed in the cache memory, and adds a first integrity code to the last fixed-length data set of the fixed-length data sets generated by the division, the first integrity code being generated based on the entire variable-length data.Type: GrantFiled: February 19, 2009Date of Patent: October 18, 2011Assignee: Hitachi, Ltd.Inventors: Shinichi Kasahara, Osamu Torigoe, Tetsuya Kojima, Takeshi Ishiguro
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Publication number: 20110242089Abstract: In one embodiment, the liquid crystal shutter is equipped with a first liquid crystal panel in the OCB mode to control the transmissivity of the light entering into left eye and a second liquid crystal panel in the OCB mode to control the transmissivity of the light entering into right eye, and a drive portion to control the transmissivity. The drive portion applies a normal voltage of a normal drive in a pulse shape and a retention voltage having a pulse shape with lower frequency than the normal voltage or lower voltage than normal voltage to the first liquid crystal panel and the second liquid crystal panel. The drive portion switches between the normal drive and the retention drive while maintaining bend alignment state.Type: ApplicationFiled: March 29, 2011Publication date: October 6, 2011Applicant: Toshiba Mobile Display Co., Ltd.Inventors: Hirohisa Miki, Shigesumi Araki, Kazuhiro Nishiyama, Tetsuya Kojima, Kenji Nakao
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Publication number: 20110149182Abstract: In one embodiment, a pair of liquid crystal shutter glasses include a first liquid crystal shutter and a second liquid crystal shutter. The first and second liquid crystal shutters are switched to a transmissive state by turns. The respective first and second liquid crystal shutters include a first electrode substrate and a second electrode substrate opposing the first electrode substrate. An OCB (Optically Compensated Bend) mode liquid crystal layer is held between the first and second electrode substrates. The first electrode substrate includes a first electrode and a second electrode arranged adjacent to the first electrode. The first and second electrodes respectively include a side opposing each other and a plurality of projecting portions provided to the respective opposing sides of the first and second electrodes alternately.Type: ApplicationFiled: December 21, 2010Publication date: June 23, 2011Applicant: Toshiba Mobile Display Co., Ltd.Inventors: Tetsuo Fukami, Shigesumi Araki, Tetsuya Kojima, Toshiyuki Higano, Kenji Nakao
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Publication number: 20110080535Abstract: A liquid crystal shutter includes a first support substrate having a first electrode and a second support substrate having a second electrode opposite to the first electrode. A liquid crystal layer is sandwiched between the first and second electrodes so as to have a switching region. The switching region becomes a bend alignment state from a splay alignment state when a voltage is applied to the liquid crystal layer. A nucleus region formation portion is arranged on the first support substrate to form a nucleus region in the switching region corresponding to the nucleus region formation portion in the liquid crystal layer, in which the splay alignment is more stable than in the switching region.Type: ApplicationFiled: May 3, 2010Publication date: April 7, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Tetsuya KOJIMA, Toshiyuki Higano, Shigesumi Araki, Tetsuo Fukami, Kazuhiro Nishiyama
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Patent number: 7804081Abstract: A radiation conversion panel allows recorded radiation image information to be read therefrom with high accuracy while reliably avoiding adverse effects of residual past radiation image information that remains in the radiation conversion panel. When a radiation conversion panel storing radiation image information therein is scanned by reading light from a reading light source, the radiation image information is read from first linear electrode layers, and scanned position information is read from a first linear electrode layer of a marker. A corrector corrects presently read radiation image information based on past radiation image information and scanned position information to acquire radiation image information free from the effect of a residue of the past radiation image information.Type: GrantFiled: September 30, 2007Date of Patent: September 28, 2010Assignee: FUJIFILM CorporationInventor: Tetsuya Kojima
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Publication number: 20100194319Abstract: A rotary electric machine controller including a current detector detecting rotary electric machine currents generated in a rotary electric machine, a position estimation mechanism outputting an estimated position in accordance with the rotary electric machine currents; a controller outputting voltage commands in accordance with the estimated position; a pulse-width modulator outputting logic signals which are pulse-width modulated in accordance with the voltage commands and with a switching cycle used for pulse-width modulation control; and a voltage application mechanism applying AC voltages for driving the rotary electric machine in accordance with the logic signals. The voltage commands output by the controller are obtained by superimposing, on fundamental voltages for driving the rotary electric machine, position detection voltages which each have a cycle equal to m times of the switching cycle and which are different in phase among respective phases.Type: ApplicationFiled: May 9, 2008Publication date: August 5, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masato Ito, Yoshihiko Kimpara, Tetsuya Kojima
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Patent number: 7746437Abstract: A liquid crystal display includes an insulating substrate, an alignment layer covering a main surface of the insulating substrate, and electrodes interposed therebetween. The alignment layer defines an alignment direction parallel to the main surface, an upstream side as one end's side of the alignment direction, and a downstream side as another end's side of the alignment direction, and tilts liquid crystal molecules toward the downstream side. Each electrode includes an upstream section that includes a first edge facing the upstream side and a downstream section that includes a second edge facing the downstream side and is provided with a recess recessed relative to the second edge. The first recess forms on the downstream section a third edge extending in the alignment direction and a fourth edge connecting the third edge to the second edge and facing the upstream side.Type: GrantFiled: February 7, 2008Date of Patent: June 29, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yuko Kizu, Yukio Kizaki, Rei Hasegawa, Hirofumi Wakemoto, Kenji Nakao, Tetsuya Kojima, Tetsuo Fukami
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Patent number: 7724877Abstract: A radiographic imaging system comprises: a grid located opposite a surface of a radiographic image data detector to remove scatter radiation occurring when a radiation penetrates the subject; a grid moving mechanism for moving the grid at least in a direction; control means for acquiring first radiographic image data with the radiographic image data detector in a preset imaging time while moving the grid with the gird moving mechanism; and anomaly detection means for calculating a displacement of a grid image in the first radiographic image data based upon a position in which the grid is located and a displacement of the grid effected by the grid moving mechanism during the preset imaging time and detecting a defect in the first radiographic image data having a length agreeing with the calculated displacement of the grid image.Type: GrantFiled: June 11, 2009Date of Patent: May 25, 2010Assignee: Fujifilm CorporationInventor: Tetsuya Kojima