Patents by Inventor Douglas Sojourner

Douglas Sojourner 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: 6750939
    Abstract: A liquid crystal micro display (lcmd) is manufactured by creating a hole in an lcmd surface, filling the lcmd with liquid crystal material through the hole, and then sealing the hole. The invention allows an lcmd to be tested before it is separated from other lcmds and packaged. As a result, the invention increases the yield and reduces the cost associated with lcmd manufacturing.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: June 15, 2004
    Assignee: Agilent Technologies, Inc.
    Inventors: Douglas Sojourner, Ken A. Nishimura, Charles D. Hoke, Barry Bronson
  • Patent number: 6700561
    Abstract: A system and method for using gamma correction in a ferroelectric liquid crystal (FLC) display uses a reduced number of different increment values for generating a Vramp signal for the FLC display without noticeably increasing error. The increment values are based upon an inverse gamma curve having a selected gamma value. Using linear interpolation, the increment values are calculated with more increment values being calculated for the beginning of the curve than the flatter end portion of the curve. In addition, an illumination period and a balance period are used so that each pixel of the FLC display is on and off for the same amount of time. As a result, the average voltage across the FLC material is 0V.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: March 2, 2004
    Assignee: Agilent Technologies, Inc.
    Inventors: Harold F Christensen, Jr., Douglas Sojourner, Jeanne M Hermsen, Xuemei Zhang, Travis N Blalock
  • Publication number: 20020159020
    Abstract: A liquid crystal micro display (lcmd) is manufactured by creating a hole in an lcmd surface, filling the lcmd with liquid crystal material through the hole, and then sealing the hole. The invention allows an lcmd to be tested before it is separated from other lcmds and packaged. As a result, the invention increases the yield and reduces the cost associated with lcmd manufacturing.
    Type: Application
    Filed: April 25, 2001
    Publication date: October 31, 2002
    Inventors: Douglas Sojourner, Ken A. Nishimura, Charles D. Hoke, Barry Bronson
  • Patent number: 6473092
    Abstract: A color display device and a method is provided that renders images in a way optimized for perception by the human visual system, improving image color quality, and reducing device complexity are provided. The display device uses only two phases of illumination. This results in a reduction in sequential color artifact, cost and device complexity. A first illuminant source is optically coupled to a pixel and is adapted to provide a first color component on a first dual-color axis with a first duration. A second illuminant source is also optically coupled to the pixel and is adapted to provide a second color component on a second dual-color axis with a second duration. The first and the second color components are combined to illuminate the pixel with the first and second colors of the respective first and second durations whereby the pixel is perceived to be illuminated by a single color of a single intensity.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: October 29, 2002
    Assignee: Agilent Technologies, Inc.
    Inventor: Douglas Sojourner
  • Patent number: 6330099
    Abstract: An apron and a skirt of a spatial light modulator are each coupled to a substrate by reverse-bias diodes. The spatial light modulator includes liquid crystal material between an array of electrodes and a ground electrode. The apron surrounds the array, and the segmented skirt surrounds the apron. The array, apron, and skirt are formed over the substrate. The reverse-bias diodes provide suitable electrical isolation during normal operation, but dissipate excessive charge that might accumulate during plasma etching as the modulator is being manufactured and that might otherwise induce damage due to electrostatic discharge.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: December 11, 2001
    Assignee: Agilent Technologies, Inc.
    Inventors: Douglas Sojourner, Craig Robson, Harold Dean Lewis