Rare Earth Patents (Class 313/468)
  • Penetration phosphors and display devices
    Patent number: 3939377
    Abstract: La.sub.2 O.sub.2 S particles are employed as carrier hosts in a cathodo-luminescent penetration phosphor composition for cathode ray display tubes. Tb and Eu ions are used in low concentrations as activators in the control of the red and green optical emission from within a film of the activated host material.
    Type: Grant
    Filed: September 13, 1974
    Date of Patent: February 17, 1976
    Assignee: Sperry Rand Corporation
    Inventor: Stanley F. Ignasiak