Patents by Inventor Tomoharu Nakamura
Tomoharu Nakamura 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: 20130070639Abstract: There is provided a node detection apparatus including: a first acquisition section that acquires identification information peculiar to a communication device in accordance with a first communication protocol; a second acquisition section that acquires the identification information peculiar to the communication device in accordance with a second communication protocol; and an identification section that identifies the communication device that complies with both of the first communication protocol and the second communication protocol based on the identification information acquired by the first acquisition section and the identification information acquired by the second acquisition section.Type: ApplicationFiled: August 28, 2012Publication date: March 21, 2013Applicant: PFU LIMITEDInventors: Tetsuya DEMURA, Toshitaka KAWAHIGASHI, Naoki SAITOU, Masaki MATSUDA, Tomoharu NAKAMURA
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Patent number: 8348446Abstract: An area light source device according to the present invention includes a plate-shaped light guide plate that has one surface that serves as a transmissive surface and another surface that is on the opposite side from the transmissive surface and in which a plurality of recessed portions are provided. The area light source device also includes at least two light-emitting diodes that are accommodated in each of the recessed portions, that emit light in a direction in which the light guide plate extends, and that are disposed such that they emit light in different directions. In this configuration, directing a light-emitting face of any one of the light-emitting diodes such that it faces a given light-emitting area makes it possible to cause light to be emitted uniformly within the light-emitting area and also makes it possible to cause light to be emitted only within the specific light-emitting area.Type: GrantFiled: September 22, 2009Date of Patent: January 8, 2013Assignee: Sony CorporationInventor: Tomoharu Nakamura
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Publication number: 20120106994Abstract: By providing a step in a pressing member for pressing a recording material P to a reading surface of an image-pickup unit, surface images in a tight contact area and a non-tight-contact area are picked up. By identifying the type of the recording material P based on the two surface images, the accuracy of identifying the recording material is improved without using a plurality of sensors.Type: ApplicationFiled: October 12, 2011Publication date: May 3, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Tsutomu Ishida, Shoichi Koyama, Tomoharu Nakamura, Shun-ichi Ebihara, Norio Matsui
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Publication number: 20120020685Abstract: A recording material determination device includes an ultrasonic wave transmission unit configured to transmit an ultrasonic wave to a recording material based on a driving signal, an ultrasonic wave receiving unit configured to receive the ultrasonic wave, a light exposure unit configured to expose the recording material to light, a light receiving unit configured to receive light, an amplification unit configured to amplify an ultrasonic wave received by the ultrasonic wave receiving unit to a first output value, and after the amplification unit amplifies the ultrasonic wave received by the ultrasonic wave receiving unit to the first output value, a control unit performs control so as to obtain the second output value by the light exposure unit and the light receiving unit during a period of time after the amplification of the ultrasonic wave is stopped and before the next ultrasonic wave comes to be transmittable.Type: ApplicationFiled: July 8, 2011Publication date: January 26, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Shun-ichi Ebihara, Norio Matsui, Shoichi Koyama, Tsutomu Ishida, Tomoharu Nakamura
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Publication number: 20110276804Abstract: A server authentication method is provided. In the method, a client receives a public key of an evaluated server during establishment of a secure communication path with the evaluated server. The client terminal transmits a first ID to the evaluated server. The client terminal receives a second ID and a first random number from the evaluated server. The client terminal determines that the evaluated server is valid when the received first random number corresponds to the transmitted first ID and a public key stored in a public key management unit configured to manage the public key in advance is identical to the received public key. The client terminal transmits a second random number corresponding to the second ID to the evaluated server when the evaluated server is determined to be valid.Type: ApplicationFiled: November 12, 2009Publication date: November 10, 2011Applicant: PANASONIC CORPORATIONInventors: Jun Anzai, Tomoharu Nakamura
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Publication number: 20110258311Abstract: There is provided a monitoring apparatus including a monitoring unit that monitors an operating situation of nodes over a network based on a predetermined monitoring parameter, a memory that records the operating situation monitored by the monitoring unit, and a changing unit that changes the monitoring parameters based on a past operating situation recorded by the memory.Type: ApplicationFiled: December 9, 2010Publication date: October 20, 2011Applicant: PFU LimitedInventors: Naoki SAITOU, Toshitaka Kawahigashi, Tomoharu Nakamura
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Publication number: 20110242794Abstract: A light emitting device includes: a light guide unit; a light source; a light control member having a light incidence face on a back face, a light outgoing face on a surface and a light dispersion structure, and disposed so as to cover the gap on the neighboring two light guide plates; and a diffusion member disposed above the light guide unit and the light control member. The light dispersion structure includes a plurality of grooves extending in a direction along the side end face of the light guide plate and having curved wall faces, and emits leakage light from the gap in outgoing light of the light emitting element to a region wider than a region opposed to the gap, in the diffusion member.Type: ApplicationFiled: March 24, 2011Publication date: October 6, 2011Applicant: Sony CorporationInventors: Tomoharu Nakamura, Shingo Ohkawa, Satoru Murata
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Publication number: 20110142461Abstract: In a device for detecting a basis weight of a recording material, an initial measurement is performed by using ultrasonic waves that have passed through the recording material, and the recording material is roughly classified first. By changing the number of pulses of the driving signal in accordance with a result of the initial measurement, the basis weight of the recording material can be detected by using ultrasonic waves suitable for the recording material, so that the detection accuracy of the basis weight of the recording material can be increased.Type: ApplicationFiled: December 13, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Tomoharu Nakamura, Norio Matsui, Shoichi Koyama, Tsutomu Ishida, Shun-ichi Ebihara
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Publication number: 20100079978Abstract: An area light source device according to the present invention includes a plate-shaped light guide plate that has one surface that serves as a transmissive surface and another surface that is on the opposite side from the transmissive surface and in which a plurality of recessed portions are provided. The area light source device also includes at least two light-emitting diodes that are accommodated in each of the recessed portions, that emit light in a direction in which the light guide plate extends, and that are disposed such that they emit light in different directions. In this configuration, directing a light-emitting face of any one of the light-emitting diodes such that it faces a given light-emitting area makes it possible to cause light to be emitted uniformly within the light-emitting area and also makes it possible to cause light to be emitted only within the specific light-emitting area.Type: ApplicationFiled: September 22, 2009Publication date: April 1, 2010Inventor: Tomoharu NAKAMURA
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Publication number: 20080244684Abstract: A digital broadcast receiving apparatus is disclosed that performs channel list switching without increasing the apparatus scale and power consumption. In this apparatus, schedule control section (125) acquires the current time from time information acquisition section (105), and reads channel list identification information corresponding to the current time stored in schedule storage section (108), and overall control section (121) reads a channel list stored in channel list storage section (107) in accordance with the channel list identification information read by schedule control section (125), and sets the read channel list as “current.” Frequency channel selection section (122) performs channel selection using the frequency channel indicated by the last channel of the channel list set as current, and service channel selection section (124) performs channel selection of the service channel indicated by the last channel.Type: ApplicationFiled: November 28, 2005Publication date: October 2, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Tatsuya Nishi, Masahiro Kosugi, Koubun Naito, Tomoharu Nakamura
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Patent number: 6338009Abstract: A method of, and an apparatus for, estimating frequency characteristics of a power system in accordance with the operation conditions of the power system. In the estimation of frequency characteristics, a sensitivity coefficient of power control of each generator with respect to a frequency deviation is defined as a frequency characteristic coefficient of the generator and this frequency characteristic coefficient of the generator is weighted in accordance with its rated output so as to determine a frequency characteristic coefficient of a generator group comprising a plurality of generators belonging to the power system. A frequency characteristic coefficient of a load determined separately is added to the frequency characteristic coefficient of the generator group, and estimated frequency characteristics for the supply-and-demand imbalance quantity of the power system are provided.Type: GrantFiled: October 20, 1998Date of Patent: January 8, 2002Assignee: Hitachi, Ltd.Inventors: Yasuo Sato, Chihiro Fukui, Tomoharu Nakamura
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Patent number: 5703791Abstract: A system information input means takes in system information and a system state determining means determines states of the system. A component operation state determination means determines operation states of system stabilizing components. A control plan deciding means decides a control plan of the system in consideration of operation states of the system and the system stabilizing components. In deciding the control plan, a swing mode analyzing means firstly analyzes the swing mode at each place of the system on the basis of waveforms of time domain response simulations. Then, a control allotment setting means determines control allotment for each of the system stabilizing components based on the mode analysis and a control parameter setting means control sets the control parameters of each of the system stabilizing components. If plural control plans are obtained, the optimal one is selected based on eigenvalues of dynamics of the system or by evaluating time domain system responses by simulation method.Type: GrantFiled: February 13, 1995Date of Patent: December 30, 1997Assignee: Hitachi, Ltd.Inventors: Masahiko Amano, Masahiro Watanabe, Hiroo Konishi, Shinya Tanifuji, Tomoharu Nakamura
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Patent number: 5349522Abstract: An AC system having, for example, a voltage source, an inductance and a load has connected thereto an apparatus for controlling the phase and amplitude of the voltage of the system. The instantaneous current and voltage in the AC electrical system are measured and power measurements derived therefrom. The power measurements may be instantaneous real and imaginary power, instantaneous active and reactive power, or active and reactive power averaged over less than one cycle. The power measurements are then used to derive phase related control values, on the basis of which control signals are generated to a converter. The action of the converter in accordance with the control signals thus controls the amplitude and phase of the voltage. By use of power measurements, it is not necessary to measure the phase of the voltage of the AC system.Type: GrantFiled: June 12, 1992Date of Patent: September 20, 1994Assignee: Hitachi, Ltd.Inventors: Hiroo Konishi, Hironari Kawazoe, Junzo Kawakami, Tomoharu Nakamura, Yukio Tokiwa, Tatsuhito Nakajima
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Patent number: 5061922Abstract: A signal transmission/monitoring method for a system including a master station and a plurality of slave stations installed on and along a signal transmission line so as to be capable of mutually performing information transmission and reception in such a manner that the master station calls the slave stations through sequential polling with the called slave station sending reply information to the master station. An interrupt enable time zone is provided between a time point at which the call signal transmission from the master station is completed and a time point at which the reply signal transmission from the slave station is started. When other slave station issues an interrupt request within the interrupt enable time zone, signal transmission to the master station from that other slave station is carried out with priority.Type: GrantFiled: April 19, 1989Date of Patent: October 29, 1991Assignee: Hitachi, Ltd.Inventors: Kazuo Nishijima, Terunobu Miyazaki, Eisaburo Sakou, Tomoharu Nakamura, Mitsuru Nakamura
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Patent number: 4891570Abstract: A static var compensator which includes a transformer with one end connected to an electric power system and a series circuit constituted by a reactor and a thyristor bulb connected between the other end of the transformer and ground. A voltage detection device detects the voltage of the electric power system and the output of the voltage detection device is sample an even number of times for every cycle of the voltage. A register is provided for storing sampled values an adder is provided for adding absolute values of the sampled values stored in the register. A firing angle of the thyristor bulb is controlled by a control device in accordance with a deviation of an output of the adder from an output of a voltage setting device. A deviation deriving device obtains a deviation of an output of the control device from a predetermined value corresponding to a present var, and an output of the deviation deriving devices is fed back to an input side of the control device.Type: GrantFiled: December 2, 1987Date of Patent: January 2, 1990Assignee: Hitachi, Ltd.Inventors: Tomoharu Nakamura, Hiroyuki Irokawa, Syoichi Mashiko, Hidehiko Shimamura, Hirofumi Tsutsumi
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Patent number: 4430683Abstract: A ground detecting device for detecting a ground fault in a DC circuit, through which a DC power produced by converting a poly-phase AC power by an AC-DC converter is transmitted and which is connected at an earth point to the earth, is arranged to detect an earth current flowing through the earth point and extract a DC component, if any, from the detected earth current and to judge whether a ground fault has occurred or not by comparing the level of the DC component with a predetermined reference level.Type: GrantFiled: February 24, 1982Date of Patent: February 7, 1984Assignee: Hitachi, Ltd.Inventors: Tadao Kawai, Tomoharu Nakamura