Patents by Inventor Keizoh Takeda

Keizoh Takeda 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: 6844957
    Abstract: A structure and fabrication technology for a reflective, ambient light, low cost display is described incorporating a plurality of cells laid out side by side and stacked as many as three levels on top of each other. Each stack of three cells being driven by an array of TFT's positioned on the bottom layer. Each cell comprises a light transmitting front window, three levels of individual cells RGB (Red, Green, and Blue) stacked on top of each other, each level having its own individual electrode, each electrode being connected by vertical conducting via holes running through each transparent dielectric spacert and being connected to a individual TFT. The bottom panel having a reflective surface so as to provide maximum reflectivity of the ambient light. Placed under the reflective surface is an array of TFT's which provide the electrical impulses necessary to set each individual potential in each vertically stacked cell with respect to ground potential.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: January 18, 2005
    Assignee: International Business Machines Corporation
    Inventors: Keiji Matsumoto, Lubomyr Taras Romankiw, Kuniaki Sueoka, Yoichi Taira, Keizoh Takeda
  • Publication number: 20030043316
    Abstract: A structure and fabrication technology for a reflective, ambient light, low cost display is described incorporating a plurality of cells laid out side by side and stacked as many as three levels on top of each other. Each stack of three cells being driven by an array of TFT's positioned on the bottom layer. Each cell comprises a light transmitting front window, three levels of individual cells RGB (Red, Green, and Blue) stacked on top of each other, each level having its own individual electrode, each electrode being connected by vertical conducting via holes running through each transparent dielectric spacert and being connected to a individual TFT. The bottom panel having a reflective surface so as to provide maximum reflectivity of the ambient light. Placed under the reflective surface is an array of TFT's which provide the electrical impulses necessary to set each individual potential in each vertically stacked cell with respect to ground potential.
    Type: Application
    Filed: November 29, 2001
    Publication date: March 6, 2003
    Applicant: International Business Machines Corporation
    Inventors: Keiji Matsumoto, Lubomyr Taras Romankiw, Kuniaki Sueoka, Yoichi Taira, Keizoh Takeda