Patents by Inventor Shigetoshi Hiratsuka

Shigetoshi Hiratsuka 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).

  • Contact type image sensor having photoelectric conversion elements to reduce signal variation caused by luminous intensity variation of light source
    Patent number: 5162644
    Abstract: A contact type image sensor comprises a transparent substrate, photoelectric conversion elements disposed on the substrate, and an opaque film disposed selectively over the first photoelectric conversion elements. The first photoelectric conversion element over which the opaque film is disposed indicates a reference quantity of received light. The second photoelectric conversion element connected with the first photoelectric conversion element in adjacent relationship and having no opaque film disposed thereover indicates a quantity of light from an original document. A signal free from a varying luminance of the light source is obtained from the junction point of the first and second photoelectric conversion elements.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: November 10, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Nagata, Michihiro Watanabe, Takehiko Yamada, Shigetoshi Hiratsuka
  • Optical printer head with a light emitting diode array
    Patent number: 4905021
    Abstract: An optical printer head with a light emitting diode array comprises means for setting a distance between a light emitting surface of a light emitting diode array chip and a rod lens array. The means is provided with two reference position levels at which the light emitting diode array chip and the rod lens array are held. Therefore, there is no necessity for adjusting the distance between the light emitting diode array chip and the rod lens array so that a productivity thereof is much improved.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: February 27, 1990
    Assignee: Hitachi Cable, Ltd.
    Inventors: Hisao Iizuka, Shigetoshi Hiratsuka, Kiyohiko Tanno, Teruji Satou, Norihiro Ashizuka
  • Optical printer head with a light emitting diode array
    Patent number: 4829321
    Abstract: An optical printer head with a light emitting diode array comprises means for setting a distance between a light emitting surface of a light emitting diode array chip and a rod lens array. The means is provided with two reference position levels at which the light emitting diode array chip and the rod lens array are held. Therefore, there is no necessity for adjusting the distance between the light emitting diode array chip and the rod lens array so that a productivity thereof is much improved.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: May 9, 1989
    Assignees: Hitachi Cable, Ltd., Hitachi, Ltd.
    Inventors: Hisao Iizuka, Shigetoshi Hiratsuka, Kiyohiko Tanno, Teruji Satou, Norihiro Ashizuka
  • Thermal print head
    Patent number: 4636813
    Abstract: The lead wires extending from heating resistors to a driver IC for the heating resistors are arranged in the space under the driver IC. These lead wires are constructed in that they become narrower in wire width as approaching the driver IC so as to lie within the width of the driver IC, and the lead wires positioned under the driver IC are constructed in that they become broader in wire width as approaching the connecting terminals of the driver IC. Connection of the lead wires and the driver IC is carried out by the face-down bonding using Controlled Collapse Bonding.By providing the construction as mentioned above, a thermal print head of higher density and definition can be obtained.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: January 13, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Kazuyoshi Mego, Shigetoshi Hiratsuka, Eiichi Hara
  • Thermal printhead
    Patent number: 4517444
    Abstract: Disclosed is a thermal printhead made of an insulating substrate, and a heat generating resistor layer formed on the substrate, and wherein the heat generating resistor layer is supplied with electric current. The heat generating resistor layer is made of Cr-Si-SiO alloy, and with the Cr, Si and SiO contents falling within a region defined by points A, B, C and D in a triangular diagram, where the points A, B, C and D are determined as follows:______________________________________ Cr (mol %) (Si (mol %) SiO (mol %) ______________________________________ A 79.4 2.1 18.5 B 58.6 40.9 0.5 C 10.1 89.4 0.5 D 24.4 3.7 71.9.
    Type: Grant
    Filed: January 20, 1984
    Date of Patent: May 14, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Tsuneyoshi Kawahito, Katsuo Abe, Tsuneaki Kamei, Kazuyuki Fujimoto, Masao Mitani, Shigetoshi Hiratsuka
  • Resistor
    Patent number: 4460494
    Abstract: Disclosed is a resistor made of an alloy consisting essentially of Cr, Si and SiO.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: July 17, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Katsuo Abe, Tsuneyoshi Kawahito, Tsuneaki Kamei, Masao Mitani, Kazuyuki Fujimoto, Shigetoshi Hiratsuka