Patents by Inventor Stephen M. Beldon

Stephen M. Beldon 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).

  • Liquid crystal devices with greyscale
    Patent number: 7692672
    Abstract: This invention relates to a liquid crystal device with grey scale. The invention uses dither, either spatial or temporal. For spatial dither the invention arranges so that at least one bit of dither is not a multiple of the size of a smaller bit of dither—in other words there is a fractional weighting. The two bits of dither have the same number of addressable transmission levels and the weighting sacrifices some linearity in exchange for reduction of manufacturing tolerances for the smaller bit. For temporal dither the invention relates to fractional weighting of the duration of the sub-frames.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: April 6, 2010
    Assignee: ZBD Displays Limited
    Inventors: John C. Jones, Stephen M. Beldon
  • Liquid crystal devices with greyscale
    Publication number: 20080170018
    Abstract: This invention relates to a liquid crystal device with grey scale. The invention uses dither, either spatial or temporal. For spatial dither the invention arranges so that at least one bit of dither is not a multiple of the size of a smaller bit of dither—in other words there is a fractional weighting. The two bits of dither have the same number of addressable transmission levels and the weighting sacrifices some linearity in exchange for reduction of manufacturing tolerances for the smaller bit. For temporal dither the invention relates to fractional weighting of the duration of the sub-frames.
    Type: Application
    Filed: July 7, 2003
    Publication date: July 17, 2008
    Inventors: John C. Jones, Stephen M. Beldon