Cathode-ray tube and blue phosphor

Details Cathode-ray tube and blue phosphor Cathode-ray tube and blue phosphor

1998-04-17

2000-02-15

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Screen

313468, 2523014S, 2523016S, 2523016R, H01J 2988

Patent

active

060256753

ABSTRACT:
In a cathode-ray tube, a phosphor screen is formed by employing a blue phosphor obtained by mixing Cu with ZnS:Ag, Al in a normal solid phase reaction, then forming the phosphor solution on the inner surface of a panel of a cathode ray tube. The resulting cathode-ray tube can have increased brightness with negligible loss of chromacity. The amount of Cu as a co-activator in the blue phosphor can range between 0.6 to 1.5 ppm. In a preferred embodiment, the blue phosphor has a chromacity y-value of 0.089.

REFERENCES:
patent: 4728856 (1988-03-01), Iwasaki et al.
patent: 5825124 (1998-10-01), Ohno et al.
Japanese Patent Abstract corresponding to Japanese Application No. 56-17744, ABS GRP No: E142; ABS vol NO: vol. 6, No. 230, Aug. 17, 1982.
Derwent Abstract (JP 55001003 A); ACC-NO: 1980-11777C; Derwent Week 198007, Jan. 7, 1980.

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