Patents by Inventor Masataka Ikeda

Masataka Ikeda 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).

  • Patent number: 8964085
    Abstract: In a CMOS image sensor in which a plurality of pixels is arranged in a matrix, a transistor in which a channel formation region includes an oxide semiconductor is used for each of a charge accumulation control transistor and a reset transistor which are in a pixel portion. After a reset operation of the signal charge accumulation portion is performed in all the pixels arranged in the matrix, a charge accumulation operation by the photodiode is performed in all the pixels, and a read operation of a signal from the pixel is performed per row. Accordingly, an image can be taken without a distortion.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: February 24, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Hikaru Tamura, Munehiro Kozuma, Masataka Ikeda, Takeshi Aoki
  • Publication number: 20140240294
    Abstract: Influence of external light is suppressed. With a photodetector including a photodetector circuit which generates a data signal in accordance with illuminance of incident light and a light unit which overlaps with the photodetector circuit, a first data signal is generated by the photodetector circuit when the light unit is in an ON state, a second data signal is formed by the photodetector circuit when the light unit is in an OFF state, and the first data signal and the second data signal are compared, so that a difference data signal that is data of a difference between the two compared data signals is generated.
    Type: Application
    Filed: May 8, 2014
    Publication date: August 28, 2014
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki KUROKAWA, Takayuki IKEDA, Hikaru TAMURA, Munehiro KOZUMA, Masataka IKEDA
  • Patent number: 8772701
    Abstract: Influence of external light is suppressed. With a photodetector including a photodetector circuit which generates a data signal in accordance with illuminance of incident light and a light unit which overlaps with the photodetector circuit, a first data signal is generated by the photodetector circuit when the light unit is in an ON state, a second data signal is formed by the photodetector circuit when the light unit is in an OFF state, and the first data signal and the second data signal are compared, so that a difference data signal that is data of a difference between the two compared data signals is generated.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: July 8, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Hikaru Tamura, Munehiro Kozuma, Masataka Ikeda
  • Patent number: 8654231
    Abstract: In a CMOS image sensor in which a plurality of pixels is arranged in a matrix, a transistor in which a channel formation region includes an oxide semiconductor is used for each of a charge accumulation control transistor and a reset transistor which are in a pixel portion. After a reset operation of the signal charge accumulation portion is performed in all the pixels arranged in the matrix, a charge accumulation operation by the photodiode is performed in all the pixels, and a read operation of a signal from the pixel is performed per row. Accordingly, an image can be taken without a distortion.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: February 18, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Hikaru Tamura, Munehiro Kozuma, Masataka Ikeda, Takeshi Aoki
  • Publication number: 20130299888
    Abstract: In a CMOS image sensor in which a plurality of pixels is arranged in a matrix, a transistor in which a channel formation region includes an oxide semiconductor is used for each of a charge accumulation control transistor and a reset transistor which are in a pixel portion. After a reset operation of the signal charge accumulation portion is performed in all the pixels arranged in the matrix, a charge accumulation operation by the photodiode is performed in all the pixels, and a read operation of a signal from the pixel is performed per row. Accordingly, an image can be taken without a distortion.
    Type: Application
    Filed: July 15, 2013
    Publication date: November 14, 2013
    Inventors: Yoshiyuki KUROKAWA, Takayuki IKEDA, Hikaru TAMURA, Munehiro KOZUMA, Masataka IKEDA, Takeshi AOKI
  • Publication number: 20130246052
    Abstract: A core network connected to a mobile communication network and establishing voice communication between communication apparatuses receives a connection request that includes an identifier identifying a terminating communication apparatus, from the mobile communication network, to which an originating mobile communication apparatus is connected, and temporarily signals a first codec candidate that should be used by the originating mobile communication apparatus to the originating mobile communication apparatus. Then, the core network determines at least one codec that can be used in the terminating communication apparatus.
    Type: Application
    Filed: November 10, 2011
    Publication date: September 19, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Itsuma Tanaka, Masataka Ikeda, Kazuhito Tokunaga
  • Publication number: 20110291013
    Abstract: Influence of external light is suppressed. With a photodetector including a photodetector circuit which generates a data signal in accordance with illuminance of incident light and a light unit which overlaps with the photodetector circuit, a first data signal is generated by the photodetector circuit when the light unit is in an ON state, a second data signal is formed by the photodetector circuit when the light unit is in an OFF state, and the first data signal and the second data signal are compared, so that a difference data signal that is data of a difference between the two compared data signals is generated.
    Type: Application
    Filed: May 23, 2011
    Publication date: December 1, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yoshiyuki KUROKAWA, Takayuki IKEDA, Hikaru TAMURA, Munehiro KOZUMA, Masataka IKEDA
  • Publication number: 20110221724
    Abstract: To reduce power consumption. Included are a selection signal output circuit, a reset signal output circuit, and a plurality of photodetector circuits. After the selection signal output circuit outputs part of the selection signals, output of the other selection signals from the selection signal output circuit is stopped. After the reset signal output circuit outputs part of the reset signals, output of the other reset signals from the reset signal output circuit is stopped.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 15, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Hikaru Tamura, Masataka Ikeda
  • Publication number: 20110221704
    Abstract: To reduce power consumption, included are a selection signal output circuit, a reset signal output circuit, and a photodetector circuit. The selection signal output circuit is for outputting a selection signal. The reset signal output circuit is for outputting a reset signal. The photodetector circuit is supplied with the reset signal and the selection signal, is brought into a reset state in accordance with the input reset signal, generates a voltage corresponding to the illuminance of incident light when light enters the photodetector circuit, and outputs the generated voltage as a data signal in accordance with the input selection signal. In a first period, the reset signal output circuit and the selection signal output circuit output the reset signal and the selection signal, respectively. In a second period, stopped are output of the reset signal from the reset signal output circuit and output of the selection signal from the selection signal output circuit.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 15, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Hikaru Tamura, Masataka Ikeda
  • Publication number: 20110215323
    Abstract: In a CMOS image sensor in which a plurality of pixels is arranged in a matrix, a transistor in which a channel formation region includes an oxide semiconductor is used for each of a charge accumulation control transistor and a reset transistor which are in a pixel portion. After a reset operation of the signal charge accumulation portion is performed in all the pixels arranged in the matrix, a charge accumulation operation by the photodiode is performed in all the pixels, and a read operation of a signal from the pixel is performed per row. Accordingly, an image can be taken without a distortion.
    Type: Application
    Filed: March 1, 2011
    Publication date: September 8, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yoshiyuki KUROKAWA, Takayuki IKEDA, Hikaru TAMURA, Munehiro KOZUMA, Masataka IKEDA, Takeshi AOKI
  • Publication number: 20110200742
    Abstract: A drying method in which a substrate on which a coating liquid such as a resist liquid containing a volatile solvent is applied is dried under a reduced pressure in an airtight container, and an inert gas is then supplied in the container, so that flows do not concentrate and accumulate in the center portion includes placing the substrate in the container, reducing pressure in the container by exhausting air through an exhaust channel using an exhaust mechanism and volatizing the solvent, and returning the container to atmospheric pressure by supplying an inert gas through a supply channel using a supply mechanism after the reducing step. The supply mechanism includes long purge nozzles ejecting the gas inside the container and spaced from and parallel to two opposed substrate edges. The returning step is performed by the nozzles ejecting the gas toward inside walls of the container opposite to the substrate.
    Type: Application
    Filed: August 17, 2009
    Publication date: August 18, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Masataka Ikeda
  • Patent number: 7212281
    Abstract: A method of measuring polarization mode dispersion of an optical fiber includes inputting linearly polarized pulse light into an optical fiber, separating the input linearly polarized light from backscattered light from the optical fiber, detecting a light intensity of the backscattered light as time series data since the generation of the pulse light, calculating a fluctuation of the detected light intensity in the time series data, and evaluating polarization mode dispersion in the optical fiber, based on the calculated fluctuation value.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: May 1, 2007
    Assignee: Fujikura, Ltd.
    Inventors: Shoji Tanigawa, Tomoharu Sagawa, Masataka Ikeda, Shoichiro Matsuo, Kuniharu Himeno, Koichi Harada
  • Patent number: 7164835
    Abstract: An optical fiber includes: a core at a center; a first cladding layer; a second cladding layer; and a third cladding layer. A maximum refractive index of the core is greater than any of maximum refractive indices of the first cladding layer, the second cladding layer, and the third cladding layer, and the maximum refractive index of the second cladding layer is smaller than any of the maximum refractive indices of the first and the third cladding layer. Additionally, a ratio of a2/a1 is not less than about 2.5 and not more than about 4.5, where a1 represents the radius of the core, and a2 represents the radius of an outer periphery of the first cladding layer, and a relative refractive index difference of the core with respect to a maximum refractive index of the third cladding layer is not less than 0.20% and not more than 0.70%.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: January 16, 2007
    Assignee: Fujikura, Ltd.
    Inventors: Shoichiro Matsuo, Kuniharu Himeno, Koichi Harada, Masataka Ikeda
  • Publication number: 20060039665
    Abstract: An optical fiber includes: a core at a center; a first cladding layer; a second cladding layer; and a third cladding layer. A maximum refractive index of the core is greater than any of maximum refractive indices of the first cladding layer, the second cladding layer, and the third cladding layer, and the maximum refractive index of the second cladding layer is smaller than any of the maximum refractive indices of the first and the third cladding layer. Additionally, a ratio of a2/a1 is not less than about 2.5 and not more than about 4.5, where a1 represents the radius of the core, and a2 represents the radius of an outer periphery of the first cladding layer, and a relative refractive index difference of the core with respect to a maximum refractive index of the third cladding layer is not less than 0.20% and not more than 0.70%.
    Type: Application
    Filed: October 6, 2005
    Publication date: February 23, 2006
    Inventors: Shoichiro Matsuo, Kuniharu Himeno, Koichi Harada, Masataka Ikeda
  • Publication number: 20050259241
    Abstract: A method of measuring polarization mode dispersion of an optical fiber includes inputting linearly polarized pulse light into an optical fiber, separating the input linearly polarized light from backscattered light from the optical fiber, detecting a light intensity of the backscattered light as time series data since the generation of the pulse light, calculating a fluctuation of the detected light intensity in the time series data, and evaluating polarization mode dispersion in the optical fiber, based on the calculated fluctuation value.
    Type: Application
    Filed: July 18, 2003
    Publication date: November 24, 2005
    Inventors: Shoji Tanigawa, Tomoharu Sagawa, Masataka Ikeda, Shoichiro Matsuo, Kuniharu Himeno, Koichi Harada
  • Patent number: 6708529
    Abstract: An undergarment formed from a tubular mixed knitted fabric that comprises a poly(trimethylene terephthalate) fiber crimped yarn and a short fiber, a blending ratio of the crimped yarn is 15 to 60% by weight, a blending ratio of the short fiber is 30 to 85% by weight, and the tubular mixed knitted fabric has a course number of from 30 to 70 courses/2.54 cm and a wale number of from 30 to 70 wales/2.54 cm.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: March 23, 2004
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Hiroshi Yamazaki, Masataka Ikeda
  • Patent number: 6668598
    Abstract: The present invention provides a warp knitted fabric containing a latent crimp fiber but no elastic fiber, and showing a stretchability of 60% or more in both the warp and weft directions, and a residual strain at 60% elongation recovery of 15% or less in both the warp and weft directions. The warp knitted fabric of the present invention shows little lowering of the stretchable functions during dyeing at high temperature, repeated washing, repeated stretching, or the like treatment, and is excellent in elongation recovery due to the high stretchability, surface smoothness and shape retention.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: December 30, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yasushi Miyake, Naoki Kataoka, Masataka Ikeda
  • Publication number: 20030094019
    Abstract: The present invention provides a warp knitted fabric containing a latent crimp fiber but no elastic fiber, and showing a stretchability of 60% or more in both the warp and weft directions, and a residual strain at 60% elongation recovery of 15% or less in both the warp and weft directions. The warp knitted fabric of the present invention shows little lowering of the stretchable functions during dyeing at high temperature, repeated washing, repeated stretching, or the like treatment, and is excellent in elongation recovery due to the high stretchability, surface smoothness and shape retention.
    Type: Application
    Filed: July 3, 2002
    Publication date: May 22, 2003
    Inventors: Yasushi Miyake, Naoki Kataoka, Masataka Ikeda
  • Patent number: 6561230
    Abstract: A weft knitted fabric made from a poly(trimethylene terephthalate) fiber yarn and not containing other elastic yarns such as a polyurethane yarn, a polyester type elastic yarn and a polyester ether type elastic yarn, and showing an elongation under constant load in a range from 80 to 250% in the weft direction under a load of 19.6N per 2.5 cm, an elongation elastic modulus after elongation by 50% of 80% or more in the weft direction, a fabric weight per square meter in a range from 80 to 500 g/m2, a bulk density in a range from 0.28 to 0.60 g/cm3 and a shear rigidity G in a range from 0.28 to 1.50 cN/cm•deg.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: May 13, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Masataka Ikeda, Hiroshi Yamazaki
  • Publication number: 20030056553
    Abstract: The present invention provides an undergarment formed from a tubular knitted fabric that comprises a poly(trimethylene terephthalate) fiber crimped yarn in a blending ratio of 15% by weight or more, the tubular knitted fabric having a course number of from 30 to 70 courses/2.54 cm and a wale number of from 30 to 70 wales/2.54 cm. The undergarment of the present invention has a soft feeling, shows excellent stretchability and an excellent elongation recovery in both the warp and weft directions, and is excellent in durability and/or a comfort to the wearer.
    Type: Application
    Filed: March 19, 2002
    Publication date: March 27, 2003
    Inventors: Hiroshi Yamazaki, Masataka Ikeda