Patents by Inventor Hirofumi Aoki

Hirofumi Aoki 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: 20190281729
    Abstract: An object of the present disclosure is to provide a heat radiation member which excels in the cooling performance for a heat generator mounted in a thin casing and the thermal diffusion performance from the heat generator. A vapor chamber to be attached inside a casing includes: a flat plate-like container having a cavity portion; a wick structure provided to the cavity portion; a working fluid sealed in the cavity portion; and a resin attachment member, provided on the container, for attachment into the casing.
    Type: Application
    Filed: May 29, 2019
    Publication date: September 12, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu INAGAKI, Hirofumi AOKI
  • Publication number: 20190230366
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Application
    Filed: April 1, 2019
    Publication date: July 25, 2019
    Applicant: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Publication number: 20190219219
    Abstract: A heat insulating structure body comprising: a container which includes a first plate-like body, a second plate-like body facing the first plate-like body, a partition plate for dividing a space between the first plate-like body and the second plate-like body, a first cavity part formed by the first plate-like body and the partition plate, and a second cavity part formed by the second plate-like body and the partition plate, wherein a wick structure body and a working fluid are sealed in the second cavity part.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu INAGAKI, Hirofumi AOKI
  • Publication number: 20190141855
    Abstract: Provided is a vapor chamber that is extremely thin but nonetheless allows a working fluid to smoothly flow back, prevents dry-out and provides a superior heat transport capability, regardless of an installation orientation such as a top heat orientation or a change in the installation orientation.
    Type: Application
    Filed: December 31, 2018
    Publication date: May 9, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu INAGAKI, Kenya KAWABATA, Hirofumi AOKI
  • Publication number: 20190137187
    Abstract: Provided is a heat sink structure which can reliably prevent blocking and narrowing of an inner space of the planar heat pipe thus having excellent heat transmission characteristics, and which can make cooling of a plurality of heat generating elements installed in a narrowed inner space uniform with a simple configuration. A heat sink structure has a planar heat pipe configured to be placed on a plurality of heat generating elements thus being thermally coupled to the plurality of heat generating elements; and a tubular heat pipe thermally coupled to a heat radiating portion of the planar heat pipe at a heat receiving portion of the tubular heat pipe.
    Type: Application
    Filed: December 31, 2018
    Publication date: May 9, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu INAGAKI, Kenya KAWABATA, Hirofumi AOKI, Daiki TAKEMURA
  • Patent number: 10284859
    Abstract: There is provided a video encoding device capable of changing a quantization step size frequently while reducing an increase in code rate to enable high-quality moving image encoding, comprising a quantization step size encoding unit 10 for encoding a quantization step size that controls the granularity of quantization, the quantization step size encoding unit 10 includes a step size prediction unit 11 for predicting the quantization step size that controls the granularity of the quantization by using a quantization step size assigned to a neighboring image block already encoded.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: May 7, 2019
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Patent number: 10262863
    Abstract: A method for manufacturing a SiC epitaxial wafer according to one aspect of the present invention includes separately introducing, into a reaction space for SiC epitaxial growth, a basic N-based gas composed of molecules containing an N atom within the molecular structure but having neither a double bond nor a triple bond between nitrogen atoms, and a Cl-based gas composed of molecules containing a Cl atom within the molecular structure, and mixing the N-based gas and the Cl-based gas at a temperature equal to or higher than the boiling point or sublimation temperature of a solid product generated by mixing the N-based gas and the Cl-based gas.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: April 16, 2019
    Assignees: SHOWA DENKO K.K., Central Research Institute Of Electric Power Industry
    Inventors: Keisuke Fukada, Masahiko Ito, Isaho Kamata, Hidekazu Tsuchida, Hideyuki Uehigashi, Hiroaki Fujibayashi, Masami Naito, Kazukuni Hara, Takahiro Kozawa, Hirofumi Aoki
  • Publication number: 20190024984
    Abstract: To provide a heat pipe where the heat pipe has an excellent capacity for absorbing a non-condensable gas such as a hydrogen gas thus exhibiting excellent heat transfer characteristics. The heat pipe includes: a container having a cavity portion inside the container; a wick structure disposed in the cavity portion; a working fluid sealed in the cavity portion; and a metal which absorbs hydrogen at 350° C. or below and releases no hydrogen at 350° C. or below, the metal being disposed in the cavity portion.
    Type: Application
    Filed: February 24, 2017
    Publication date: January 24, 2019
    Applicant: Furukaw Electric Co., Ltd.
    Inventors: Hirofumi Aoki, Hiroshi Sakai, Yoshikatsu Inagaki
  • Publication number: 20180374721
    Abstract: A supply part includes a first partition, a second partition under the first partition, a third partition under the second partition, a first flow path between the first partition and the second partition allowing a first gas to be introduced therein, a second flow path between the second partition and the third partition allowing a second gas to be introduced therein, a first piping extending from the second partition to reach below the third partition and being communicated with the first flow path, a second piping extending from the third partition to reach below the third partition and being communicated with the second flow path, and a convex portion provided on an outer circumferential surface of the first piping or an inner circumferential surface of the second piping protruding from one of the outer circumferential surface and the inner circumferential surface toward the other one.
    Type: Application
    Filed: August 31, 2018
    Publication date: December 27, 2018
    Inventors: Kunihiko Suzuki, Naohisa Ikeya, Keisuke Fukada, Masahiko Ito, Isaho Kamata, Hidekazu Tsuchida, Hiroaki Fujibayashi, Hideyuki Uehigashi, Masami Naito, Kazukuni Hara, Hirofumi Aoki, Takahiro Kozawa
  • Patent number: 10154267
    Abstract: A video encoding device includes: transform means 11 for transforming an image block; entropy encoding means 12 for entropy-encoding transformed data of the image block transformed by the transform means 11; PCM encoding means 13 for PCM-encoding the image block; multiplex data selection means 14 for selecting output data of the entropy encoding means 12 or the PCM encoding means 13, in a block of a block size set from the outside; and multiplexing means 15 for embedding a PCM header in a bitstream, in the block of the set from the outside block size.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: December 11, 2018
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Junji Tajime, Hirofumi Aoki, Kenta Senzaki
  • Patent number: 10119770
    Abstract: A planar heat pipe includes a container having a hollow portion provided at a central portion thereof with two opposing plate-shaped bodies, and a working fluid enclosed in the hollow portion. The hollow portion is provided with a wick structure. At least one of the plate-shaped bodies is a composite member of two or more types of metal members that are laminated and integrated. A metal member of the composite member forming a layer that contacts the hollow portion has a thermal conductivity of greater than or equal to 200 W/m·K and a metal member of the composite member forming a layer that contacts an exterior has a thermal conductivity of less than or equal to 100 W/m·K, a peripheral portion of the hollow portion being sealed.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: November 6, 2018
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi Aoki, Hiroshi Sakai, Tatsuro Miura, Yoshikatsu Inagaki
  • Patent number: 10107561
    Abstract: A heat pipe suited for thinning, and achieving high heat transport performance is provided. A heat pipe 1 according to the invention includes working liquid, a container 2 into which the working liquid is sealed, and a mesh member 3 disposed in such a position as to come into contact with at least two inner surfaces of the container, the two surfaces facing to each other. The mesh member 3 is formed by a plurality of meshes 31 and 32 laminated on each other. The porosity in the portion where the respective meshes 31 and 32 contact each other is lower than the porosity in the portion where the meshes 31 and 32 contact the container 2.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: October 23, 2018
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu Inagaki, Hiroshi Sakai, Hirofumi Aoki, Masanobu Sugimura
  • Patent number: 10110892
    Abstract: A video encoding device includes: a transformer for transforming an image block; an entropy encoder for entropy-encoding transformed data of the image block transformed by the transformer; a PCM encoder for PCM-encoding an image block; a multiplexed data selector for selecting output data of the entropy encoder or output data of the PCM encoder, for each block of an externally set block size; and a multiplexer for embedding a PCM header into a bitstream, in a block of the externally set block size, wherein the number of successive PCM-encoded blocks is embedded into the PCM header, and PCM data for the number of successive PCM-encoded blocks is multiplexed into the bitstream.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: October 23, 2018
    Assignee: NEC Corporation
    Inventors: Keiichi Chono, Hirofumi Aoki, Yuzo Senda
  • Patent number: 10097847
    Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: October 9, 2018
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Junji Tajime, Hirofumi Aoki, Kenta Senzaki
  • Patent number: 10085025
    Abstract: Disclosed are image quantization parameter decoding method and systems for decoding a quantization parameter for a video decoding process that is based on context-based adaptive binary arithmetic coding. In one embodiment, an image quantization parameter decoding method includes binary-arithmetic-decoding a first bin indicating whether or not a delta quantization parameter is significant, other bins, which are subsequent to the first bin, indicating an absolute value of the delta quantization parameter, and a sign bin, which is subsequent to the other bins, indicating whether the delta quantization parameter is positive or negative. The method further includes generating a delta quantization parameter by de-binarizing the first bin, the other bins and the sign bin. The method further includes generating a re-constructed quantization parameter by adding a predicted quantization parameter to the delta quantization parameter.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: September 25, 2018
    Assignee: NEC Corporation
    Inventors: Keiichi Chono, Hirofumi Aoki
  • Patent number: 10021385
    Abstract: A video encoding device includes a planar prediction unit using planar prediction, and a noise injecting unit for injecting pseudo-random noise into a prediction image of a planar prediction block when a reconstructed prediction error value for planar prediction is less than a threshold determined by the size of the planar prediction block. The video encoding device then uses the pseudo-random noise in linear interpolation for calculating the prediction image, based on the conditions under which a gradient distortion occurs, to suppress the gradient distortion.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: July 10, 2018
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Hirofumi Aoki, Kenta Senzaki
  • Patent number: 10021432
    Abstract: A time series data encoding apparatus includes a time series data encoding means 11 for compressing and encoding time series data thereby to generate encoded bit streams, a virtual buffer 12 for calculating a transition of the amount of data accumulated in a buffer in a virtual decoder defined according to an encoding system, a buffer usage analyzing means 13 for analyzing the transition of the amount of accumulated data thereby to reset parameters indicating a size of the buffer and the amount of accumulated data in the buffer at a predetermined time, and a multiplexing means 14 for multiplexing the encoded bit streams generated by the time series data encoding means 11 and the parameters reset by the buffer usage analyzing means 13.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: July 10, 2018
    Assignee: NEC CORPORATION
    Inventor: Hirofumi Aoki
  • Patent number: 9995537
    Abstract: The purpose of this invention is to provide a sheet-shaped heat pipe that makes it possible to reduce a pressure loss caused by a vapor flow or a pressure loss caused by a working fluid flow to improve the maximum amount of heat to be transported and reduce thermal resistance by increasing the cross-sectional area of a vapor flow passage or a fluid flow passage, which has been limited by the length of a container in a height direction. A heat pipe (20) is provided with a protruding portion (24) so that the height of the wick-occupied portion (23) serving as the fluid flow passage is larger than the height of the space portion (22) serving as the vapor flow passage.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: June 12, 2018
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi Aoki, Masami Ikeda, Yoshikatsu Inagaki
  • Patent number: 9978277
    Abstract: A vehicle control device for starting a drive assist in accordance with relative positional relationship between a self vehicle and an object around the self vehicle, comprises a control value calculating part which calculates a control value based on an inter-vehicular distance between the self vehicle and the object, a velocity of the self vehicle, a relative velocity of the object to the self vehicle, and an acceleration-related value obtained based on at least one of an acceleration of the self vehicle and an acceleration of the object; an acceleration-related value adjusting part which adjusts the acceleration-related value by changing a degree of contribution of at least one of the acceleration of the self vehicle and the acceleration of the object in the acceleration-related value in accordance with the acceleration of the self vehicle; and a drive assist start judging part which starts the drive assist if the control value is greater than a threshold value.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: May 22, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshinori Okita, Hirofumi Aoki
  • Patent number: 9936212
    Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: April 3, 2018
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Junji Tajime, Hirofumi Aoki, Kenta Senzaki