Patents by Inventor Hayakawa Takashi

Hayakawa Takashi 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).

  • Photoconductor coupled liquid crystal light valve with impurity doping which varies in the thickness direction
    Patent number: 5446563
    Abstract: A photoconductor coupled liquid crystal light valve having at least a photoconductive layer, an optical reflection layer, and a liquid crystal layer between a pair of electrodes, wherein the photoconductive layer is made of amorphous silicon layer, and an impurity doped in the photoconductive layer is uniform in amount in the in-plane direction of the photoconductive layer and continuously higher in concentration in the layer-thickness direction from the electrode side toward the optical reflection layer side.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: August 29, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hayakawa Takashi