Patents by Inventor Tatsuo Nakagawa
Tatsuo Nakagawa 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: 20190128908Abstract: A sample liquid-surface position measurement device includes: a first light source that illuminates a side face of a container containing a sample; a first optical measurement sensor that is located on the opposite side of the container from the first light source, and measures transmitted light from the first light source; a first label position measuring unit that measures a position of a label affixed to the container; and an analysis section that calculates a liquid-surface position or an interface position of the sample in the container, from transmitted-light intensity data in a longitudinal direction of the container which is measured by the first optical measurement sensor, and from the position of the label in the longitudinal direction of the container which is measured by the first label position measuring unit.Type: ApplicationFiled: April 11, 2017Publication date: May 2, 2019Inventors: Tatsuo NAKAGAWA, Kiyotaka SUGIYAMA, Tsukasa SUENARI, Iwao SUZUKI
-
Publication number: 20180248469Abstract: A conventional power supply device has a problem in miniaturization. A power supply device generates a prediction value of an error signal from first and second error signals, and controls an output voltage so that the prediction value lies between first and second threshold values. The first error signal is obtained by converting an error voltage based on the difference between the output voltage and a reference voltage at a first timing. The second error signal is obtained by converting an error voltage based on the difference between the output voltage and the reference voltage at a second timing.Type: ApplicationFiled: April 26, 2018Publication date: August 30, 2018Inventors: Ming LIU, Tatsuo NAKAGAWA, Kenichi OSADA
-
Publication number: 20180192994Abstract: An ultrasound diagnosis device includes: an ultrasound probe which transmits an ultrasound wave toward a examinee and receives a reflected wave from the examinee; and a main device which controls the transmitting and receiving of the ultrasound waves from the ultrasound probe and is operated to receive a receiving signal obtained by receiving the reflected wave from the examinee by the ultrasound probe, to generate an ultrasound image of the examinee, and to display the ultrasound image on a display screen, wherein the ultrasound probe includes a plurality of subarrays having a plurality of element circuits transmitting and receiving ultrasound signals and a plurality of reference voltage sources, and the plurality of subarrays and the plurality of reference voltage sources have a one-to-one correspondence.Type: ApplicationFiled: October 4, 2016Publication date: July 12, 2018Inventors: Yusaku KATSUBE, Tatsuo NAKAGAWA, Yasuyuki OKUMA, Yohei NAKAMURA, Takahide TERADA, Shinya KAJIYAMA, Takuma NISHIMOTO, Yutaka IGARASHI
-
Patent number: 9973074Abstract: A conventional power supply device has a problem in miniaturization. A power supply device generates a prediction value of an error signal from first and second error signals, and controls an output voltage so that the prediction value lies between first and second threshold values. The first error signal is obtained by converting an error voltage based on the difference between the output voltage and a reference voltage at a first timing. The second error signal is obtained by converting an error voltage based on the difference between the output voltage and the reference voltage at a second timing.Type: GrantFiled: April 18, 2017Date of Patent: May 15, 2018Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Ming Liu, Tatsuo Nakagawa, Kenichi Osada
-
Patent number: 9880082Abstract: A detection device configured to detect each color of a plurality of components of a biological-sample is provided. The detection device executes the detection process with respect to the container which stores the sample containing the first and the second components. The detection device includes an image pickup device for picking up an image of the container, a background section serving as background of the image pickup section, and a detection section for detecting color of the first component of the sample. The container is disposed between the image pickup section and the background section. The detection section is configured to identify a first region of the first component having the label attached to the container as background, and a second region of the first component having the background section as background so as to detect color information on the first component from at least one region of the first and the second regions.Type: GrantFiled: July 2, 2014Date of Patent: January 30, 2018Assignee: Hitachi High-Technologies CorporationInventors: Kanako Esaki, Tatsuo Nakagawa
-
Patent number: 9725753Abstract: Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. 1).Type: GrantFiled: May 31, 2011Date of Patent: August 8, 2017Assignee: Hitachi, Ltd.Inventors: Kazuo Ono, Tatsuo Nakagawa, Yoshimitsu Yanagawa, Takayuki Kawahara, Akira Kotabe, Riichiro Takemura
-
Patent number: 9728060Abstract: The present invention is a system for monitoring a health state of a subject. The system is provided with: a measuring unit that chronologically measures the position of the subject in a facility in which the subject resides or stays; and an information processing unit that determines a health state of the subject by determining whether a chronological change in the position of the subject satisfies a predetermined determination condition.Type: GrantFiled: February 26, 2013Date of Patent: August 8, 2017Assignee: Hitachi, Ltd.Inventors: Tomoyuki Ishii, Tatsuo Nakagawa, Masayoshi Ishibashi, Midori Kato
-
Publication number: 20170222540Abstract: A conventional power supply device has a problem in miniaturization. A power supply device generates a prediction value of an error signal from first and second error signals, and controls an output voltage so that the prediction value lies between first and second threshold values. The first error signal is obtained by converting an error voltage based on the difference between the output voltage and a reference voltage at a first timing. The second error signal is obtained by converting an error voltage based on the difference between the output voltage and the reference voltage at a second timing.Type: ApplicationFiled: April 18, 2017Publication date: August 3, 2017Inventors: Ming LIU, Tatsuo NAKAGAWA, Kenichi OSADA
-
Patent number: 9709497Abstract: By use of a pump light source for repeatedly generating a pump light pulse and a probe light source for repeatedly generating a probe light pulse in a shorter repetition time interval than the pump light pulse, the pump light pulse is repeatedly irradiated on a sample, and the probe light pulse is repeatedly irradiated on the sample every time the pump pulse is irradiated. An intensity of a probe light pulse having passed through the sample is detected. A shift in a delay time of the probe light pulse with respect to the pump light pulse is measured every time the pump light pulse is irradiated. Transient absorption measurement data of the sample is obtained based on the detected data of the probe light pulse intensity obtained in higher time density than repetition time density of the probe light pulse based on the measured shift in the delay time.Type: GrantFiled: November 22, 2016Date of Patent: July 18, 2017Assignee: UNISOKU CO., LTD.Inventors: Tatsuo Nakagawa, Kido Okamoto, Hiroaki Hanada
-
Patent number: 9658631Abstract: A conventional power supply device has a problem in miniaturization. A power supply device generates a prediction value of an error signal from first and second error signals, and controls an output voltage so that the prediction value lies between first and second threshold values. The first error signal is obtained by converting an error voltage based on the difference between the output voltage and a reference voltage at a first timing. The second error signal is obtained by converting an error voltage based on the difference between the output voltage and the reference voltage at a second timing.Type: GrantFiled: April 15, 2013Date of Patent: May 23, 2017Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Ming Liu, Tatsuo Nakagawa, Kenichi Osada
-
Publication number: 20170074794Abstract: By use of a pump light source for repeatedly generating a pump light pulse and a probe light source for repeatedly generating a probe light pulse in a shorter repetition time interval than the pump light pulse, the pump light pulse is repeatedly irradiated on a sample, and the probe light pulse is repeatedly irradiated on the sample every time the pump pulse is irradiated. An intensity of a probe light pulse having passed through the sample is detected. A shift in a delay time of the probe light pulse with respect to the pump light pulse is measured every time the pump light pulse is irradiated. Transient absorption measurement data of the sample is obtained based on the detected data of the probe light pulse intensity obtained in higher time density than repetition time density of the probe light pulse based on the measured shift in the delay time.Type: ApplicationFiled: November 22, 2016Publication date: March 16, 2017Applicant: UNISOKU CO., LTD.Inventors: Tatsuo NAKAGAWA, Kido OKAMOTO, Hiroaki HANADA
-
Patent number: 9572491Abstract: A vital signal measurement system including a plurality of terminals aims to facilitate synchronization of each terminal with respect to other terminals. Each of the plurality of terminals (102) is provided with a first vital signal sensor (201) for measuring a vital signal, a first memory (205) for storing a first data which is based on the vital signal, and a first radio communication unit (206) for communicating with other terminals by radio. The first data is applied with a sequence number corresponding to the first data and the number indicates an order in which the first data is acquired. A first terminal (102b) included in the plurality of terminals performs resetting of the sequence number triggered by the synchronous signal which is received by the first radio communication unit.Type: GrantFiled: September 3, 2012Date of Patent: February 21, 2017Assignee: Hitachi, Ltd.Inventors: Tatsuo Nakagawa, Tomoyuki Ishii, Akira Kotabe
-
Publication number: 20160363657Abstract: A compact delay circuit that can dynamically change delay time is configured. A probe includes an analog memory unit that accumulates electric charges corresponding to a reflected wave of an ultrasonic wave produced by a difference between the acoustic impedances on a plurality of capacitors 303 and in turn outputs the electric charges accumulated on the capacitors 303 to an analog memory unit 205. In accumulating electric charges, when a control signal Ctls_l that increases delay time of the reflected wave is inputted, the analog memory unit 205 accumulates the same electric charges on two or more of the capacitors 303 for a preset period, or in outputting electric charges, when a control signal Ctlo_l is inputted, the analog memory unit 205 outputs the electric charges accumulated on one of the capacitors 303 for a preset period.Type: ApplicationFiled: February 26, 2014Publication date: December 15, 2016Inventors: Tatsuo NAKAGAWA, Hiroshi MASUZAWA, Shinya KAJIYAMA
-
Publication number: 20160109350Abstract: A detection device configured to detect each color of a plurality of components of a biological-sample is provided. The detection device executes the detection process with respect to the container which stores the sample containing the first and the second components. The detection device includes an image pickup device for picking up an image of the container, a background section serving as background of the image pickup section, and a detection section for detecting color of the first component of the sample. The container is disposed between the image pickup section and the background section. The detection section is configured to identify a first region of the first component having the label attached to the container as background, and a second region of the first component having the background section as background so as to detect color information on the first component from at least one region of the first and the second regions.Type: ApplicationFiled: July 2, 2014Publication date: April 21, 2016Inventors: Kanako ESAKI, Tatsuo NAKAGAWA
-
Publication number: 20160013782Abstract: A delay circuit and an ultrasonic imaging apparatus with the higher-accuracy delay time, the longer maximum delay time, and the lower power consumption are provided. An input line to which an analog input signal is input, a plurality of analog signal memory devices, an output line, a plurality of sampling switches that control connection/disconnection between the input line and the plurality of analog signal memory devices, a plurality of output switches that control connection/disconnection between the plurality of analog signal memory devices and the output line, and a clock generation part that generates sampling switch control signals for controlling the sampling switches and output switch control signals for controlling the output switches are provided, and phase of the sampling switch control signals may be shifted with respect to phase of the output switch control signals.Type: ApplicationFiled: March 28, 2013Publication date: January 14, 2016Inventor: Tatsuo NAKAGAWA
-
Publication number: 20150356849Abstract: The present invention is a system for monitoring a health state of a subject. The system is provided with: a measuring unit that chronologically measures the position of the subject in a facility in which the subject resides or stays; and an information processing unit that determines a health state of the subject by determining whether a chronological change in the position of the subject satisfies a predetermined determination condition.Type: ApplicationFiled: February 26, 2013Publication date: December 10, 2015Inventors: Tomoyuki ISHII, Tatsuo NAKAGAWA, Masayoshi ISHIBASHI, Midori KATO
-
Patent number: 9194944Abstract: Disclosed is a measurement device that can accurately measure size, position, the presence of an object, and the like by means of a simple and low-cost method. Specifically, disclosed is a measurement device that is provided with: a transmitter that transmits radio waves; a vibrating surface that vibrates mechanically; a receiver that receives radio waves; and a controller that transmits radio waves from the transmitter, and on the basis of the signal of the radio waves reflected by the vibrating surface and received by the receiver, outputs information about a measured object on the pathway between the transmitter and the receiver with the vibrating surface therebetween.Type: GrantFiled: July 14, 2010Date of Patent: November 24, 2015Assignee: Hitachi, Ltd.Inventors: Tatsuo Nakagawa, Akihiko Hyodo, Hideaki Kurata, Shigeru Oho
-
Patent number: 9166474Abstract: A power supplying device performs both of a suppression of EMI noise and a reduction in an output voltage. In the power supply device, a switching control device that controls a switching element according to a pulse control signal includes a PPM circuit that modulates a pulse position; a PWM circuit that modulates a pulse width; and a pulse generator circuit that generates a pulse modulated by the PPM circuit and the PWM circuit. When a pulse interval of the pulse modulated in the pulse position by the PPM circuit is sparser than the pulse interval of the pulse before the modulation, the PWM circuit lengthens the pulse width. On the contrary, when the pulse interval of the pulse modulated in the pulse position by the PPM circuit is denser than the pulse interval of the pulse before the modulation, the PWM circuit shortens the pulse width.Type: GrantFiled: January 9, 2012Date of Patent: October 20, 2015Assignee: Hitachi, Ltd.Inventor: Tatsuo Nakagawa
-
Publication number: 20150230706Abstract: A vital signal measurement system including a plurality of terminals aims to facilitate synchronization of each terminal with respect to other terminals. Each of the plurality of terminals (102) is provided with a first vital signal sensor (201) for measuring a vital signal, a first memory (205) for storing a first data which is based on the vital signal, and a first radio communication unit (206) for communicating with other terminals by radio. The first data is applied with a sequence number corresponding to the first data and the number indicates an order in which the first data is acquired. A first terminal (102b) included in the plurality of terminals performs resetting of the sequence number triggered by the synchronous signal which is received by the first radio communication unit.Type: ApplicationFiled: September 3, 2012Publication date: August 20, 2015Inventors: Tatsuo Nakagawa, Tomoyuki Ishii, Akira Kotabe
-
Patent number: 8792946Abstract: The electronic circuit includes: a micro controller unit; a timer operable to measure a standby time of the micro controller unit; a buffer circuit connected with an output-signal terminal of the timer; a logic circuit controlled by an output signal of the timer and an output signal of the micro controller unit; and a power-on switch controlled by the logic circuit. The buffer circuit has no protection diode connected with an input terminal thereof on a power-source side, and connected to a common power source shared with the micro controller unit. The switch is one for controlling the power source of the micro controller unit and buffer circuit. The micro controller unit is made to transition to an active state to either a standby state or a power-source cutoff state during the standby time.Type: GrantFiled: October 15, 2012Date of Patent: July 29, 2014Assignee: Hitachi, Ltd.Inventors: Tatsuo Nakagawa, Masayuki Miyazaki