Mixed green light-emitting phosphor, and a cathode ray tube usin

Details Mixed green light-emitting phosphor, and a cathode ray tube usin Mixed green light-emitting phosphor, and a cathode ray tube usin

1991-05-10

1993-03-23

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Screen

313467, 2523014R, 2523014H, H01J 2920

Patent

active

051967634

ABSTRACT:
A mixed green light-emitting phosphor for a fluorescent screen of a projection cathode ray tube is prepared by mixing LaOCl phosphor activated with Tb with at least a mixture of phosphors selected from the group of a Y.sub.3 (Al,Ga).sub.5 O.sub.12 phosphor activated with Tb and a Zn.sub.2 SiO.sub.4 phosphor activated with Mn, a Y.sub.3 (Al,Ga).sub.5 O.sub.12 phosphor activated with Tb and a InBo.sub.3 phosphor activated with Tb, or a InBO.sub.3 phosphor activated with Tb and a Zn.sub.2 SiO.sub.4 phosphor activated with Mn. The fluorescent screen of the cathode ray tube is tested under standard drive conditions. From the test results, it is noted that the characteristics of the brightness and the C.I.E. coordinates of the fluorescent screen using the mixed green light-emitting phosphors is remarkably improved compared with that of the conventional Y.sub.3 Al.sub.5 O.sub.12 phosphor activated with Tb.

REFERENCES:
patent: 3579016 (1971-05-01), Palilla
patent: 4924139 (1990-05-01), Movida et al.

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