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Primary Examiner: Lesmes, George F.
Assistant Examiner: McDonald, Alan T.
Attorney: Terry; Howard P.

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Title: Penetration phosphors and display devices

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.

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Inventors: Ignasiak, Stanley F. (Marlboro, MA, US)

Application Number: 505710
Filing Date: 1974-09-13
Publication_date: 1976-02-17
Assignee: Sperry Rand Corporation (New York, NY)
Primary Class(es): 313/468 252/301.4S, 427/68, 427/215, 428/323, 428/330, 428/402, 428/403, 428/404
Other Classes:
US Patent Ref:

3046154	Jul, 1962	Feldman	117/33.
3204143	Aug, 1965	Pritchard	313/13.
3294569	Dec, 1966	Messineo et al.	117/100.
3423621	Jan, 1969	Rayce	313/468.
3517243	Jun, 1970	Jones	313/92.
3522463	Aug, 1970	Bishop	313/92.
3560783	Feb, 1971	Shortes	313/92.
3573084	Mar, 1971	Gallaro	117/33.
3622826	Nov, 1971	Royce	313/92.
3664862	May, 1972	Kingsley et al.	117/33.
3714490	Jan, 1973	Kell	313/92.
3721849	Mar, 1973	Gallaro	313/92.
3723787	Mar, 1973	Blasse et al.	313/468.
3738856	Jun, 1973	Masi	117/33.
3767459	Oct, 1973	Kingsley et al.	117/100.
3791844	Feb, 1974	Tecotzky	313/468.
3825436	Jul, 1974	Buchanan et al.	313/468.
3826679	Jul, 1974	Kingsley et al.	117/33.
3864273	Feb, 1975	Forbes et al.	252/301.

Other Refs: Other References: Kingsley et al., "Voltage Depondence of Cathode-Ray Efficiency of Phospors: Phospor Particles with Nonluminescent Coatings", Journal of Applied Physics, (Vol. 43, No. 7), July 1972.
Prenor et al., "Voltage-Controlled Multicolor CRT Phospors: Preparation and Characteristics", Journal of Electrochemistry, (Vol. 119, No. 9), Sept. 1972.
Tecotzky et al., "A New Phospor Approach for Multicolor Displays", presented at Electrochemical Society Meeting, Cleveland, Ohio, Oct. 3, 1971.
Dobrov et al., "Photoconductivity and Luminescence in Lonthanum Oxysulfide", Chemical Abstracts, Vol. 77, Abstract 145260j.
Luckey, "Lanthanum and Gadolinium Oxysulfide Phosphors", Chemical Abstracts, Vol. 77, Abstract 119820x.
Jewett et al., "EPR of Terbium (3+), Praseodymium (3+), Gadolinium (3+), and Eurpium (3+), Ions in Single Crystal Lanthanum Oxysulfide", Chemical Asbstract Vol. 81, Abstract 17958n.