Conductive coating for the interior of a cathode ray tube

Details Conductive coating for the interior of a cathode ray tube Conductive coating for the interior of a cathode ray tube

1997-11-25

1999-12-07

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Envelope

H01J 3100

Patent

active

059989203

ABSTRACT:
A coating for an interior of a color cathode ray tube. The coating includes a graphite, two ferric oxides, a disperser for forming a uniform mixture of the graphite and the two oxides, and an adhesive for adhering the coating on the interior of the color cathode ray tube. The first ferric oxide has no Fe.sup.2+ ions. The other ferric oxide has Fe.sup.2+ ions and has a grain diameter less than that of the first ferric oxide. The coating eliminates internal discharging of the CRT when the power is switched on or off.

REFERENCES:
patent: 3791546 (1974-02-01), Maley et al.
patent: 3979632 (1976-09-01), Gunning et al.
patent: 4041347 (1977-08-01), Deal et al.
patent: 4092444 (1978-05-01), Kilichowski
patent: 4124540 (1978-11-01), Foreman et al.
patent: 4210844 (1980-07-01), Buescher et al.
patent: 4251749 (1981-02-01), Compen et al.
"An Improved Shadow-Mask System for Large Size CRTs" by Richard C. Bauder and F.R. Ragland, SID Int'l Technical Papers (1990) pp. 426-429, Jan. 1, 1990.

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