Patents by Inventor Meing Fai Nigel Cheung

Meing Fai Nigel Cheung 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).

  • Scanner with an adjustable light source for scanning opaque and transparent media
    Patent number: 7907311
    Abstract: A scanner has a movable carriage, a platen that is substantially transparent to visible light overlying the carriage, and a light source physically connected to the carriage for moving therewith. The light source is selectively movable between a first position for scanning substantially opaque media positioned on the platen, and overlying the light source, and a second position for scanning media substantially transparent to visible light underlying the light source.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: March 15, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Troy Roberts, Michael A. Tregoning, Meing Fai Nigel Cheung, Edward G. Trick
  • Image enhancement system and method
    Patent number: 7706018
    Abstract: An image enhancement system includes a scanning device including a photosensor element having a plurality of different color channels. The system also includes an exposure control module configured to vary an exposure time of the plurality of different color channels to generate at least two different exposure level scans of a media object. The system further includes an imaging application configured to generate an enhanced scanned image of the media object using image data obtained from the at least two different exposure level scans.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: April 27, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael A. Tregoning, Meing Fai Nigel Cheung
  • Scanner with an adjustable light source for scanning opaque and transparent media
    Publication number: 20080192307
    Abstract: A scanner has a movable carriage, a platen that is substantially transparent to visible light overlying the carriage, and a light source physically connected to the carriage for moving therewith. The light source is selectively movable between a first position for scanning substantially opaque media positioned on the platen, and overlying the light source, and a second position for scanning media substantially transparent to visible light underlying the light source.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Inventors: David Troy Roberts, Michael A. Tregoning, Meing Fai Nigel Cheung, Edward G. Trick