Patents by Inventor Kazuyuki Ishida

Kazuyuki Ishida 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: 20210367397
    Abstract: A deterioration diagnosis device includes: a temperature acquisition unit acquiring a temperature of an optical transceiver including a laser diode outputting an optical transmission signal; a bias current acquisition unit acquiring a bias current flowing through the diode; a correction function calculation unit calculating a correction function representing a relationship between the acquired temperature and bias current; a temperature correction value calculation unit calculating a temperature correction value for a bias current acquired at the time of deterioration diagnosis, using the correction function; a corrected bias current calculation unit correcting the bias current acquired at the time of the deterioration diagnosis, using the temperature correction value; and a bias current change amount calculation unit determining a state of the laser diode by comparing an initial bias current with a corrected bias current.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi SHIRAI, Yukio HIRANO, Kenichi NAKURA, Kazuyuki ISHIDA
  • Publication number: 20200381889
    Abstract: A life prediction method for an optical module that keeps optical output constant by controlling a bias current that is applied to a laser diode includes, by a life prediction device: acquiring a current value of the bias current from the optical module; holding an initial bias current value that is an initial current value of the bias current; calculating the number of digits of a difference value between the bias current value and the initial bias current value, and determining whether there is an increase in the number of digits; calculating a time interval at which occurrence of the increase in the number of digits is detected; and estimating a life of the optical module using the time interval, a first threshold, and the number of digits.
    Type: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takeshi SUEHIRO, Kenichi NAKURA, Hiromu SATO, Kazuyuki ISHIDA, Hideaki OHASHI, Noriyuki IMADA, Nanako HORAYAMA
  • Patent number: 10767912
    Abstract: A refrigeration cycle apparatus is provided with a refrigerant circuit, a refrigerant tank circuit, and a degassing pipe. The refrigerant circuit is configured by connecting a compressor, a flow path switching apparatus, a first heat exchanger, a decompressing apparatus, and a second heat exchanger. The refrigerant tank circuit is connected to the first and second heat exchangers in parallel with the decompressing apparatus. The degassing pipe has a first end and a second end. The flow path switching apparatus is configured to switch a flow of refrigerant discharged from the compressor to any of the first and second heat exchangers. The refrigerant tank circuit contains a refrigerant tank. The degassing pipe has the first end connected to the refrigerant tank and has the second end connected to at least any of the refrigerant circuit and the refrigerant tank circuit.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: September 8, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Ito, Takuya Ito, Yasushi Okoshi, Kazuyuki Ishida
  • Patent number: 10724777
    Abstract: A controller in a refrigeration cycle apparatus performs a refrigerant recovery operation when switching an operation mode from a defrosting mode to a heating mode. During the refrigerant recovery operation, by rotating a fan of a blower while monitoring a pressure at a discharge side of the compressor, the controller is configured to perform feedback control to cause a high-pressure side pressure to be close to a high-pressure side target pressure value. During the refrigerant recovery operation, by controlling a driving frequency of the compressor while monitoring a pressure at a suction side of the compressor, the controller is configured to perform feedback control to cause a low-pressure side pressure to be close to a low-pressure side target pressure value.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: July 28, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Ito, Takuya Ito, Yasushi Okoshi, Kazuyuki Ishida
  • Patent number: 10563894
    Abstract: In a refrigeration cycle apparatus, a controller is configured to, when a defrost mode is started, control a first pressure reducing device is controlled to adjust a flow rate of refrigerant to bring a degree of superheat of the refrigerant at a suction side of a compressor close to a target value, control a flow path switching device to form a first flow path through which the refrigerant released from the compressor flows to a first heat exchanger; perform a refrigerant release operation of opening one of a second pressure reducing device and a valve and closing the other of the second pressure reducing device and the valve, and perform a refrigerant collection operation of opening the second pressure reducing device and the valve, with the flow path switching device retained to form the first flow path, after the refrigerant release operation.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Ito, Kosuke Tanaka, Takuya Ito, Yasushi Okoshi, Kazuyuki Ishida
  • Publication number: 20190154322
    Abstract: A controller in a refrigeration cycle apparatus performs a refrigerant recovery operation when switching an operation mode from a defrosting mode to a heating mode. During the refrigerant recovery operation, by rotating a fan of a blower while monitoring a pressure at a discharge side of the compressor, the controller is configured to perform feedback control to cause a high-pressure side pressure to be close to a high-pressure side target pressure value. During the refrigerant recovery operation, by controlling a driving frequency of the compressor while monitoring a pressure at a suction side of the compressor, the controller is configured to perform feedback control to cause a low-pressure side pressure to be close to a low-pressure side target pressure value.
    Type: Application
    Filed: October 8, 2015
    Publication date: May 23, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masahiro ITO, Takuya ITO, Yasushi OKOSHI, Kazuyuki ISHIDA
  • Patent number: 10170039
    Abstract: A method for correcting an organic EL display including a volatile memory (MV), a non-volatile memory having a slower write speed than that of the volatile memory, and a control unit, the method to be performed by the control unit includes: performing cumulative processing for updating cumulative values in the volatile memory every first period; performing transfer processing for transferring the cumulative values from the volatile memory to the non-volatile memory every second period longer than the first period; delaying timing of the transfer processing in part of the display pixels according to the write speed of the second memory; and delaying start timing of the cumulative processing in the part of the display pixels according to the timing of the transfer processing, or switching an order of transfer of the cumulative values in the transfer processing between a first order and the reverse order of the first order.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: January 1, 2019
    Assignee: JOLED INC.
    Inventor: Kazuyuki Ishida
  • Publication number: 20180252449
    Abstract: A refrigeration cycle apparatus is provided with a refrigerant circuit, a refrigerant tank circuit, and a degassing pipe. The refrigerant circuit is configured by connecting a compressor, a flow path switching apparatus, a first heat exchanger, a decompressing apparatus, and a second heat exchanger. The refrigerant tank circuit is connected to the first and second heat exchangers in parallel with the decompressing apparatus. The degassing pipe has a first end and a second end. The flow path switching apparatus is configured to switch a flow of refrigerant discharged from the compressor to any of the first and second heat exchangers. The refrigerant tank circuit contains a refrigerant tank. The degassing pipe has the first end connected to the refrigerant tank and has the second end connected to at least any of the refrigerant circuit and the refrigerant tank circuit.
    Type: Application
    Filed: October 8, 2015
    Publication date: September 6, 2018
    Inventors: Masahiro ITO, Takuya ITO, Yasushi OKOSHI, Kazuyuki ISHIDA
  • Publication number: 20180231286
    Abstract: In a refrigeration cycle apparatus, a controller is configured to, when a defrost mode is started, control a first pressure reducing device is controlled to adjust a flow rate of refrigerant to bring a degree of superheat of the refrigerant at a suction side of a compressor close to a target value, control a flow path switching device to form a first flow path through which the refrigerant released from the compressor flows to a first heat exchanger; perform a refrigerant release operation of opening one of a second pressure reducing device and a valve and closing the other of the second pressure reducing device and the valve, and perform a refrigerant collection operation of opening the second pressure reducing device and the valve, with the flow path switching device retained to form the first flow path, after the refrigerant release operation.
    Type: Application
    Filed: August 28, 2015
    Publication date: August 16, 2018
    Inventors: Masahiro ITO, Kosuke TANAKA, Takuya ITO, Yasushi OKOSHI, Kazuyuki ISHIDA
  • Publication number: 20170229066
    Abstract: A method for correcting an organic EL display including a volatile memory (MV), a non-volatile memory having a slower write speed than that of the volatile memory, and a control unit, the method to be performed by the control unit includes: performing cumulative processing for updating cumulative values in the volatile memory every first period; performing transfer processing for transferring the cumulative values from the volatile memory to the non-volatile memory every second period longer than the first period; delaying timing of the transfer processing in part of the display pixels according to the write speed of the second memory; and delaying start timing of the cumulative processing in the part of the display pixels according to the timing of the transfer processing, or switching an order of transfer of the cumulative values in the transfer processing between a first order and the reverse order of the first order.
    Type: Application
    Filed: July 31, 2015
    Publication date: August 10, 2017
    Applicant: JOLED INC.
    Inventor: Kazuyuki ISHIDA
  • Patent number: 9478935
    Abstract: When multiplexed signal lights are amplified by optical amplifiers, a value of a monitor signal is compared with a threshold equivalent to a value of the monitor signal when noise indexes of the multiplexed signal lights start increasing. Next, when the value of the monitor signal is equal to or larger than the threshold, that is, when the powers of the multiplexed signal lights are large, a gain constant control is performed to amplify the multiplexed signal lights. Conversely, when the value of the monitor signal is smaller than the threshold, that is, when the powers of the multiplexed signal lights are small, an output constant control is performed to amplify the multiplexed signal lights.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 25, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Kazuyuki Ishida
  • Publication number: 20150188286
    Abstract: When multiplexed signal lights are amplified by optical amplifiers, a value of a monitor signal is compared with a threshold equivalent to a value of the monitor signal when noise indexes of the multiplexed signal lights start increasing. Next, when the value of the monitor signal is equal to or larger than the threshold, that is, when the powers of the multiplexed signal lights are large, a gain constant control is performed to amplify the multiplexed signal lights. Conversely, when the value of the monitor signal is smaller than the threshold, that is, when the powers of the multiplexed signal lights are small, an output constant control is performed to amplify the multiplexed signal lights.
    Type: Application
    Filed: December 5, 2012
    Publication date: July 2, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Kazuyuki Ishida
  • Patent number: 9036995
    Abstract: An optical communication system includes an optical-signal transmission unit transmitting an existing optical signal and a low-rate-signal superimposition unit superimposing a low-rate signal on the existing optical signal by intensity modulation. It further includes: a low-rate-signal extraction unit that extracts the low-rate signal from the existing optical signal on which the low-rate signal is superimposed and converts the extracted low-rate signal into a low-rate electric signal; an add-on optical-signal transmission unit that transmits an add-on optical signal; a low-rate-signal superimposition unit that superimposes a low-rate signal on the add-on optical signal by the intensity modulation based on the low-rate electric signal; and a repeater that repeats the add-on optical signal on which the low-rate signal is superimposed, to a transmission destination.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: May 19, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Kazuyuki Ishida, Takashi Mizuochi
  • Patent number: 8909066
    Abstract: In an optical transfer system, an optical transmission unit generates an optical signal in which respective polarization components are alternately present on a time axis, a time period during which the respective polarization components are simultaneously present on the time axis is substantially zero, and a symbol repetition cycle of optical signals of the respective polarization components becomes Ts, an optical reception unit causes an interference between local oscillation light and a received optical signal and converts an interfered optical signal to an electric signal, and a received electric-signal processing unit performs analog-digital conversion of an electric signal, elimination of a delay difference of Ts/2 between the respective polarized signal components, and adaptive equalization of a distortion other than the delay difference.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: December 9, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Yoshida, Takashi Sugihara, Kazuyuki Ishida, Takashi Mizuochi
  • Patent number: 8710393
    Abstract: By respectively abutting first and second outer diameter sections of a second metallic member against first and second inner diameter sections of a first metallic member, and energizing the first metallic member and the second metallic member using a pair of electrodes while pressurizing both metallic members in an axial direction thereof, a first junction where the first inner diameter section and the first outer diameter section are bonded and a second junction where the second inner diameter section and the second outer diameter section are bonded are formed between both metallic members, and a gap in which the metals do not come into contact with each other is formed between both junctions over a predetermined axial length. Accordingly, a high joint strength can be secured using less energy for bonding.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: April 29, 2014
    Assignees: Mazda Motor Corporation, Origin Electric Company, Limited
    Inventors: Shinya Okumura, Akira Hashimoto, Kazuyuki Shiino, Takeshi Fujii, Akinobu Yamagata, Hiroaki Hayashi, Tomoo Sawazaki, Kazuyuki Ishida, Masatoshi Hamano, Hiroji Sasaki
  • Patent number: 8486515
    Abstract: Disclosed is a coating composition for a plastic label, which contains an oxetane compound, an epoxy compound, and a cyclic acetal and/or a poly(vinyl butyral). The coating composition excels in suitability for printing such as gravure printing or flexographic printing, cures rapidly to give excellent productivity, and after curing, gives a coating layer that excels in adhesion to a plastic base film and in toughness. A plastic label formed using the coating composition excels in surface scratch resistance and crumpling resistance, and therefore is particularly useful as a label for use in plastic containers, and metal containers such as bottle cans.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: July 16, 2013
    Assignee: Fuji Seal International, Inc.
    Inventors: Kazuyuki Ishida, Akira Shintani, Akira Miyazaki, Suguru Arai
  • Publication number: 20130136451
    Abstract: In an optical transfer system, an optical transmission unit generates an optical signal in which respective polarization components are alternately present on a time axis, a time period during which the respective polarization components are simultaneously present on the time axis is substantially zero, and a symbol repetition cycle of optical signals of the respective polarization components becomes Ts, an optical reception unit causes an interference between local oscillation light and a received optical signal and converts an interfered optical signal to an electric signal, and a received electric-signal processing unit performs analog-digital conversion of an electric signal, elimination of a delay difference of Ts/2 between the respective polarized signal components, and adaptive equalization of a distortion other than the delay difference.
    Type: Application
    Filed: September 30, 2011
    Publication date: May 30, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Yoshida, Takashi Sugihara, Kazuyuki Ishida, Takashi Mizuochi
  • Publication number: 20130129356
    Abstract: An optical communication system includes an optical-signal transmission unit transmitting an existing optical signal and a low-rate-signal superimposition unit superimposing a low-rate signal on the existing optical signal by intensity modulation. It further includes: a low-rate-signal extraction unit that extracts the low-rate signal from the existing optical signal on which the low-rate signal is superimposed and converts the extracted low-rate signal into a low-rate electric signal; an add-on optical-signal transmission unit that transmits an add-on optical signal; a low-rate-signal superimposition unit that superimposes a low-rate signal on the add-on optical signal by the intensity modulation based on the low-rate electric signal; and a repeater that repeats the add-on optical signal on which the low-rate signal is superimposed, to a transmission destination.
    Type: Application
    Filed: September 3, 2010
    Publication date: May 23, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Kazuyuki Ishida, Takashi Mizuochi
  • Publication number: 20130039643
    Abstract: An optical communication system including optical transmission systems each includes a transmission processing unit and a receiving processing unit, wherein the transmission processing unit includes an optical transmission unit that converts electric signals into optical signals, an auxiliary optical transmission unit that converts a part of the electric signals into an optical signal having a wavelength other than wavelengths of the optical signals generated by the optical transmission unit, and outputs the generated optical signal to a different transmission processing unit, and a wavelength multiplexing unit, and the receiving processing unit includes a wavelength demultiplexing unit, an optical receiving unit that converts the optical signals having the wavelengths of the optical signals generated by the optical transmission unit into electric signals, respectively, and an auxiliary optical receiving unit that converts the optical signal having the wavelength of the optical signal generated by the auxilia
    Type: Application
    Filed: April 23, 2010
    Publication date: February 14, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Katsuhiro Shimizu, Kazuyuki Ishida, Takashi Mizuochi
  • Patent number: 8208812
    Abstract: A control-target-value setting unit sets a control target value corresponding to the number of multiplexed wavelengths measured by a number-of-multiplexed-wavelengths measuring unit. A controller controls the variable optical attenuator based on the control target value. An optical amplifier performs an optical amplification with a constant gain regardless of power of a wavelength-multiplexed light. The controller performs feedback control of the variable optical attenuator such that a result of measurement of the total power of the wavelength-multiplexed light coincides with the control target value.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: June 26, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Tokura, Katsuhiro Shimizu, Kazuyuki Ishida, Kuniaki Motoshima