Patents by Inventor Nubuo J. Koda

Nubuo J. Koda 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: 4826293
    Abstract: An electron beam addressed liquid crystal light valve (LCLV) produces an AC voltage across a liquid crystal layer from a single polarity electron beam, and exhibits very high resolution. A thin layer of partially conductive material is deposited on a support membrane on the electron beam side of the liquid crystal. A conductive, electron beam permeable sheet is formed on the back of the partially conductive layer. Electrons from the beam are absorbed by the partially conductive layer, and then flow back out to the conductive sheet to produce an AC voltage prior to the next electron beam scan. The conductive sheet is connected in circuit with a transparent electrode which provides a voltage reference on the readout side of the liquid crystal. The device is designed with electrical parameters that produce a discharge rate from the partially conductive layer fast enough to complete an AC cycle between successive electron beam scans, but slow enough for the liquid crystal to respond and produce an image.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: May 2, 1989
    Assignee: Hughes Aircraft Company
    Inventors: Jan Grinberg, Nubuo J. Koda, Philip G. Reif, William P. Bleha, Murray S. Welkowsky, Arno G. Ledebuhr