Patents by Inventor Allan I. Carlson

Allan I. Carlson 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).

  • Active matrix electro-optic display device with close-packed arrangement of diamond-like shaped
    Patent number: 5146356
    Abstract: An active matrix liquid crystal display device has diamond-shaped pixels arrayed in a close-packed arrangement, and interconnected by row and column electrodes which zigzag between the pixels, each column electrode extending between and being common to two columns of pixels and their associated thin film switches, and the column electrode-switch connections alternating sequentially between pixel columns.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: September 8, 1992
    Assignee: North American Philips Corporation
    Inventor: Allan I. Carlson
  • Apparatus for addressing active displays
    Patent number: 4890101
    Abstract: An input circuit to an active addressed display sequentially switches pixels of video information into high speed sample-and-hold elements which are coupled to corresponding signal lines on the substrate. The pixels of video information are on the signal lines for a complete switching cycle and are transferred to vertical source lines of the display during a time interval equal to the period of a switching cycle.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: December 26, 1989
    Assignee: North American Philips Corporation
    Inventor: Allan I. Carlson
  • Apparatus for addressing active displays
    Patent number: 4870399
    Abstract: An input circuit to an active addressed display sequentially switches pixels of video information into high speed sample-and-hold elements which are coupled to corresponding signal lines on the substrate. The pixels of video information are on the signal lines for a complete switching cycle and are transferred to vetical source lines of the display during a time interval equal to the period of a switching cycle.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: September 26, 1989
    Assignee: North American Philips Corporation
    Inventor: Allan I. Carlson