Patents by Inventor Hisashi Atarashi

Hisashi Atarashi 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: 5172254
    Abstract: A projection-type liquid crystal display apparatus uses liquid crystal cells as light polarizing devices. This apparatus makes a polarization control of one of the two linearly polarized light components perpendicular to each other separated by the polarizing light separating device through the first liquid crystal cell and of the other of the two through the second liquid crystal cell. The liquid crystal cells directly transmit through, a linearly polarized light component incident upon pixel portions corresponding to bright pixels of an image to be projected on the screen. Further they transmit through the one incident upon pixel portions corresponding to dark pixels of the image by converting it into the other linearly polarized light component.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: December 15, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisashi Atarashi, Yutaka Takafuji
  • Patent number: 5073772
    Abstract: A liquid crystal display device includes a liquid crystal display cell arranged between a first and second polarizers. In the liquid crystal display device, the applied voltage between electrodes is controlled by switching elements so as to drive picture elements defined at the crossings between the first and second transparent electrodes. Further, the light incident to at least a rim portion of a first transparent electrode and the switching elements is shaded by a shading film formed in the liquid crystal display cell.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: December 17, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yutaka Takafuji, Takashi Inami, Hisashi Atarashi