Patents by Inventor Yukio Watanabe

Yukio Watanabe 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: 20040041157
    Abstract: A semiconductor light emitting element and a semiconductor light emitting device, which are high in optical output, uniform in emission of light and high in production yield and productivity, comprise: an electrically conductive transparent substrate having a first surface and a second surface opposed to each other; a semiconductor epitaxial layer formed on a location of the first surface of the substrate; a first electrode formed on the semiconductor epitaxial layer; a second electrode formed on a location of the second surface of the substrate offset from alignment with the first electrode; and a groove formed to indent from the second surface of the substrate toward the first surface in a location between the first electrode and the second electrode.
    Type: Application
    Filed: June 20, 2003
    Publication date: March 4, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Yukio Watanabe
  • Patent number: 6669469
    Abstract: A low-cost, high-mass-productivity catalytic combustion apparatus having a construction that permits easy maintenance is realized. There is provided a catalytic combustion apparatus in which, by means of a combustion chamber having a fuel supply portion 1 and a combustion air supply portion on the upstream side thereof and a combustion gas exhaust port on the downstream side thereof and a catalytic combustion portion with an upstream surface and a downstream surface provided in the combustion chamber, the upstream surface and the downstream surface being substantially parallel to each other, a fuel-air mixture supplied to the interior of the combustion chamber is caused to react to liberate heat.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: December 30, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Motohiro Suzuki, Tatsuo Fujita, Tetsuo Terashima, Toshiaki Ando, Narito Yamaguchi, Yukio Watanabe
  • Publication number: 20030218172
    Abstract: A high-luminance light emitting element is manufactured by a method comprising: forming a light emitting layer on a first surface of a GaP substrate including the first surface and a second surface opposed to the first surface and having an area smaller than the first area, the light emitting layer emitting light of a wavelength &lgr; permitted to pass through the GaP substrate; forming a plurality of side surfaces on the GaP substrate to be respectively aslant by substantially the same angle to become narrower toward the second surface; and forming a plurality of depressions and protrusions as high as 0.1 &lgr; to 3 &lgr; on the side surfaces.
    Type: Application
    Filed: April 4, 2003
    Publication date: November 27, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideto Sugawara, Yukio Watanabe, Hirohisa Abe, Kuniaki Konno
  • Publication number: 20030201449
    Abstract: A semiconductor light-emitting device, including a first substrate of a first conductivity type, a first bonding layer provided on the first substrate and consisting essentially of a GaP material of the first conductivity type, a second bonding layer provided on the first bonding layer, coincident with the first bonding layer in the planar direction of the crystal, having the first conductivity type, and consisting essentially of a material represented by a formula InxGayP, where 0≦x, y≦1, and x+y=1, and a light-emitting layer comprising a first cladding layer, an active layer, and a second cladding layer, which are successively provided on the second bonding layer, each of the active layer and first and second cladding layers consisting essentially of a material represented by a formula InxGayAlzP, where x+y+z=1, and 0≦x, y, z≦1.
    Type: Application
    Filed: May 5, 2003
    Publication date: October 30, 2003
    Inventors: Ryo Saeki, Hideto Sugawara, Yukio Watanabe, Tamotsu Jitosho
  • Publication number: 20030174132
    Abstract: The present invention provides an image processing unit, an image processing system, and an image processing method capable of achieving a higher speed and a higher efficiency in a rendering and implementing a low cost of the system. The image processing unit according to the present invention comprises a main storing portion for storing information of three-dimensional objects, a plurality of calculating portions for processing images based on three-dimensional object information which are read from the main storing portion, and a hierarchical storing portion having a plurality of hierarchies and connected between the main storing portion and the plurality of calculating portions to store a part of information at a lower level into a higher level sequentially, wherein image processing by the plurality of calculating portions are performed in parallel.
    Type: Application
    Filed: March 17, 2003
    Publication date: September 18, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsushi Kunimatsu, Kiyoji Ueno, Hideki Yasukawa, Yukio Watanabe, Takayuki Kamei, Takanao Amatsubo
  • Publication number: 20030157448
    Abstract: A low-cost, high-mass-productivity catalytic combustion apparatus having a construction that permits easy maintenance is realized. There is provided a catalytic combustion apparatus in which, by means of a combustion chamber 200 having a fuel supply portion 1 and a combustion air supply portion 2 on the upstream side thereof and a combustion gas exhaust port 4 on the downstream side thereof and a catalytic combustion portion 5 with an upstream surface and a downstream surface provided in the combustion chamber 200, the upstream surface and the downstream surface being substantially parallel to each other, a fuel-air mixture supplied to the interior of the combustion chamber 200 is caused to react to liberate heat.
    Type: Application
    Filed: January 13, 2003
    Publication date: August 21, 2003
    Inventors: Motohiro Suzuki, Tatsuo Fujita, Tetsuo Terashima, Toshiaki Ando, Narito Yamaguchi, Yukio Watanabe
  • Patent number: 6586773
    Abstract: A semiconductor light-emitting device, including a first substrate of a first conductivity type, a first bonding layer provided on said first substrate and consisting essentially of a GaP material of the first conductivity type, a second bonding layer provided on the first bonding layer, coincident with the first bonding layer in a crystal orientation, having the first conductivity type, and consisting essentially of a material represented by a formula InxGayP, where 0≦x, y≦1, and x+y=1, and a light-emitting layer comprising a first cladding layer, an active layer, and a second cladding layer, which are successively provided on the second bonding layer, each of the active layer and first and second cladding layers consisting essentially of a material represented by a formula InxGayAlzP, where x+y+z=1, and 0≦x, y, z≦1.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: July 1, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ryo Saeki, Hideto Sugawara, Yukio Watanabe, Tamotsu Jitosho
  • Patent number: 6587110
    Abstract: The present invention provides an image processing unit, an image processing system, and an image processing method capable of achieving a higher speed and a higher efficiency in a rendering and implementing a low cost of the system. The image processing unit according to the present invention comprises a main storing portion for storing information of three-dimensional objects, a plurality of calculating portions for processing images based on three-dimensional object information which are read from the main storing portion, and a hierarchical storing portion having a plurality of hierarchies and connected between the main storing portion and the plurality of calculating portions to store a part of information at a lower level into a higher level sequentially, wherein image processing by the plurality of calculating portions are performed in parallel.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: July 1, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Kunimatsu, Kiyoji Ueno, Hideki Yasukawa, Yukio Watanabe, Takayuki Kamei, Takanao Amatsubo
  • Patent number: 6565695
    Abstract: The transfer sheet comprises a support and a transfer layer capable of separating from the support and of fixing a toner image formed by an electrophotographic printer, wherein an average value of a surface roughness of the transfer layer is 0.5 to 3.5 &mgr;m. The transfer layer may comprise a thermoplastic resin and a fine particle. A weight ratio of the thermoplastic resin to the fine particle is about 50/50 to 99/1. The thermoplastic resin may be a thermoplastic polyurethane-series resin, and the fine particle may be a polyethylene fine particle having a mean particle size of about 1 to 100 &mgr;m.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: May 20, 2003
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Tatsuo Takeuchi, Yukio Watanabe, Kenji Nakama, Shinichi Morisuna
  • Patent number: 6434345
    Abstract: An image forming apparatus has an unfixed toner image forming device, and a fixing device, wherein a toner amount of the unfixed toner image forming device is smaller than a toner amount of the unfixed toner image formed on a second recording material having a thickness smaller than that of the first recording material by the unfixed toner image forming device. The image forming apparatus is thus able to form a good image on a thick recording.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: August 13, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Watanabe
  • Publication number: 20020050601
    Abstract: A semiconductor light-emitting device, including a first substrate of a first conductivity type, a first bonding layer provided on the first substrate and consisting essentially of a GaP material of the first conductivity type, a second bonding layer provided on the first bonding layer, coincident with the first bonding layer in the planar direction of the crystal, having the first conductivity type, and consisting essentially of a material represented by a formula InxGayP, where 0≦x, y≦1, and x+y=1, and a light-emitting layer comprising a first cladding layer, an active layer, and a second cladding layer, which are successively provided on the second bonding layer, each of the active layer and first and second cladding layers consisting essentially of a material represented by a formula InxGayAlzP, where x+y+z=1, and 0≦x, y, z≦1.
    Type: Application
    Filed: October 31, 2001
    Publication date: May 2, 2002
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryo Saeki, Hideto Sugawara, Yukio Watanabe, Tamotsu Jitosho
  • Publication number: 20020045031
    Abstract: The transfer sheet comprises a support and a transfer layer capable of separating from the support and of fixing a toner image formed by an electrophotographic printer, wherein an average value of a surface roughness of the transfer layer is 0.5 to 3.5 &mgr;m. The transfer layer may comprise a thermoplastic resin and a fine particle. A weight ratio of the thermoplastic resin to the fine particle is about 50/50 to 99/1. The thermoplastic resin may be a thermoplastic polyurethane-series resin, and the fine particle may be a polyethylene fine particle having a mean particle size of about 1 to 100 &mgr;m.
    Type: Application
    Filed: February 28, 2001
    Publication date: April 18, 2002
    Inventors: Tatsuo Takeuchi, Yukio Watanabe, Kenji Nakama, Shinichi Morisuna
  • Patent number: 6316792
    Abstract: A compound semiconductor light emitting element includes a light emitting region formed by a pn-junction between a first compound semiconductor layer of a first conductivity type and a second compound semiconductor layer of a second conductivity type. A first electrode is connected to the first compound semiconductor layer and is isolated from the second compound semiconductor layer. A current spreading layer is formed on the second compound semiconductor layer and a block is formed on the second compound semiconductor layer. A second electrode is formed on the block and is connected to the current spreading layer.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: November 13, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Haruhiko Okazaki, Yukio Watanabe
  • Publication number: 20010026697
    Abstract: An object of the present invention is to provide an image forming apparatus in which a good image can be formed even on a thick recording through-out. The present invention provides an image forming apparatus that has unfixed toner image forming means, and fixing means, wherein a toner amount of the unfixed toner image forming means is smaller than a toner amount of the unfixed toner image formed on a second recording material having a thickness smaller than that of the first recording material by the unfixed toner image forming means.
    Type: Application
    Filed: February 13, 2001
    Publication date: October 4, 2001
    Inventor: Yukio Watanabe
  • Patent number: 6243546
    Abstract: An image forming apparatus has a document scanning unit which can be shifted while illuminating an original and which is shifted backwardly at a speed faster than a speed when said document scanning unit is shifted forwardly to scan the original, and a control unit which lowers the electric power supplied to an image fixing means when the document scanning unit is shifted backwardly.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: June 5, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Watanabe, Shigemichi Hamano
  • Patent number: 6226108
    Abstract: When an image is adjusted to compensate for individual differences among image forming units, there are cases where a phenomenon occurs in which a contour that is originally non-existent appears in a low-density portion, namely an area other than that where the output density characteristic is linear. In such instances image quality deteriorates markedly when importance is placed upon tonality. To solve this problem, a printer is caused to print an image diagnostic pattern, the image diagnostic pattern that has been printed is read by a reader and the linear portion of the output density characteristic of a design center value and the linear portion of the read output density characteristic are approximated by straight lines. Both of the output density characteristics are compared and image adjustment coefficients A, B are compared. The coefficients A, B thus obtained are set in a primary converter and gamma tables in a gamma converter are changed over in conformity with the values of the coefficients A, B.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: May 1, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Toyohara, Tsuyoshi Kunishi, Yukio Watanabe
  • Patent number: 6216476
    Abstract: In an apparatus having a refrigeration cycle, the refrigeration cycle is formed by annularly connecting a compressor, a condenser, an expansion device and an evaporator with one another, the apparatus uses propane, isobutane or ethane as a refrigerant, and uses refrigerating machine oil having less mutual solubility with the refrigerant, and a dryer is provided in the refrigeration cycle for absorbing water. In stead of the dryer, an additive which reacts with water may be included in said refrigerating machine oil. With this arrangement, the amount of the refrigerant can be reduced, and the long term reliability of the apparatus can be obtained.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: April 17, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hironao Numoto, Kanji Haneda, Akira Fujitaka, Shigehiro Sato, Yukio Watanabe, Yuichi Yakumaru, Yoshinori Kobayashi
  • Patent number: 6196008
    Abstract: A method for taking custody of, transporting and installing an air conditioner having an outdoor unit which uses a flammable refrigerant and includes a refrigeration cycle comprising a compressor, an expansion device and an outdoor heat exchanger which are connected to one another through pipes, wherein the outdoor unit is shipped from a factory while the refrigeration cycle is evacuated to produce a vacuum, the outdoor unit is kept in custody and transported in a state in which the vacuum in the refrigeration cycle is maintained, and when the outdoor unit is installed, the flammable refrigerant is charged into the refrigeration cycle.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: March 6, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akira Fujitaka, Yoshinori Kobayashi, Yuichi Yakumaru, Yukio Watanabe, Hironao Numoto, Shigehiro Sato, Kanji Haneda
  • Patent number: 6167719
    Abstract: In a compressor of a refrigeration cycle using an HC-based refrigerant and a lubricant having specific gravity greater than that of the HC-based refrigerant and having no or no or less mutual solubility with the HC-based refrigerant, an oil reservoir is formed on a bottom of the compressor, the oil reservoir is provided at its portion with a recess, a suction port of a lubricant suction pipe for supplying the lubricant to a compressor mechanism is provided in the recess. With this feature, it is possible to sufficiently supply the lubricant to the compressor even when the lubricant has no or less mutual solubility, so that even if the amount of the lubricant is reduced, the lubricant can be sufficiently sucked from an inlet port of a lubricant pumping pipe and supplied to the compressor mechanism.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: January 2, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuichi Yakumaru, Yukio Watanabe, Akira Fujitaka, Hironao Numoto, Shigehiro Sato, Kanji Haneda, Yoshinori Kobayashi
  • Patent number: 6121635
    Abstract: A current blocking layer (7) formed immediately below a transparent electrode (9) is formed of a semiconductor layer containing Al, and a bandgap equal to or longer than the emission wavelength. Since the current blocking layer (7) is formed of such semiconductor layer, an oxide film forms on or near the surface of the current blocking layer (7) in a process of forming the transparent electrode (9) such as an ITO film containing oxygen, and the current blocking layer functions effectively. The diameter of a bonding electrode (20) is set to be smaller than that of the current blocking layer (7), thus effectively outputting the light emitted. Furthermore, the oxidized current blocking layer can have a high breakdown voltage and, hence, can be formed to have a small thickness, thus improving step coverage upon forming the transparent electrode on the current blocking layer. By inserting a thin Zn layer (8) between the transparent electrode (9) and an ohmic layer (6), the adhesion therebetween can be improved.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: September 19, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yukio Watanabe, Ryo Saeki, Hideki Nozaki