Patents by Inventor Harold F Christensen, Jr.

Harold F Christensen, Jr. 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: 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
  • Patent number: 4881163
    Abstract: A queue buffer used for the controlled buffering and transferal of data between a cache memory of a central processor unit and a mainstore memory unit. The queue buffer of the present invention preferably includes a buffer memory for the queued storage of data and a controller for directing the nominally immediate acceptance and storage of data received direct from a cache memory and for the nominally systematic background transfer of data from the queue buffer to the mainstore memory unit. This nominal prioritization of memory transfers with respect to the queue buffer memory allows data move-in requests requiring data from the main storage unit to proceed while required move-out data is moved from a cache memory immediately to the buffer queue memory.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: November 14, 1989
    Assignee: Amdahl Corporation
    Inventors: Jeffrey A. Thomas, Theodore S. Robinson, Robert A. Ertl, Harold F. Christensen,Jr.