Patents by Inventor Mary A. Lemoine

Mary A. Lemoine 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).

  • Far-red emitting phosphor for cathode ray tubes
    Patent number: 5512210
    Abstract: A far-red emitting phosphor for cathode ray tubes used in liquid crystal light valves comprises Y.sub.3-y Gd.sub.y Al.sub.5-x Ga.sub.x -O.sub.12 :A, where x ranges from 0 to 5, y ranges from 0 to 3, and A is selected from the group consisting of chromium, iron, vanadium, neodymium, dysprostum, cobalt, nickel, titanium or combination thereof.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: April 30, 1996
    Inventors: Esther Sluzky, Mary A. Lemoine, Kenneth R. Hesse
  • Liquid crystal light value in combination with cathode ray tube containing a far-red emitting phosphor
    Patent number: 5202777
    Abstract: A far-red emitting phosphor for cathode ray tubes used in liquid crystal light valves comprises Y.sub.3-y Gd.sub.y Al.sub.5-x Ga.sub.x O.sub.12 :A, where x ranges from 0 to 5, y ranges from 0 to 3, and A is selected from the group consisting of chromium, iron, vanadium, neodymium, dysprosium, cobalt, nickel, titanium or combination thereof.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: April 13, 1993
    Assignee: Hughes Aircraft Company
    Inventors: Esther Sluzky, Mary A. Lemoine, Kenneth R. Hesse
  • Liquid-crystal light valve in combination with a cathode ray tube containing a far-red emitting phosphor
    Patent number: 5162930
    Abstract: A far-red emitting phosphor for cathode ray tubes used in liquid crystal light valves comprises lithium aluminum (or gallium) oxide, activated with iron or chromium. Increasing the activator concentration from 0.005 mole (commercially available) to about 0.015 to 0.05 mole increases the phosphor efficiency by about 50% and reduces the decay time from 30 msec (for the commerically available material) to 19 msec. Reducing the particle size to an average of 4 .mu.m or less provides the requisite high resolution for the CRT application.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: November 10, 1992
    Assignee: Hughes Aircraft Company
    Inventors: Esther Sluzky, Mary A. Lemoine, Kenneth R. Hesse
  • Liquid crystal light valve in combination with a cathode ray tube containing a far-red emitting double-activated yttrium aluminum garnet phosphor
    Patent number: 5140449
    Abstract: A doubly activated yttriuim aluminum garnet (YAG) phosphor, activated with both europium and chromium, is provided. The concentration of Eu ranges from about 1 to 5 at %, while the concentration of Cr ranges from about 0.1 to 1 at %. The YAG:Eu,Cr phosphor has a line spectrum which more closely matches the spectral sensitivity of amorphous silicon liquid crystal light valves thereby, providing more efficient use of the available energy.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: August 18, 1992
    Assignee: Hughes Aircraft Company
    Inventors: Esther Sluzky, Mary A. Lemoine, Kenneth R. Hesse