Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1998-10-13
2000-12-05
Day, Michael H.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313407, 313408, H01J 2980
Patent
active
061571210
ABSTRACT:
A color picture tube comprises an evacuated envelope having an electron gun therein for generating at least one electron beam, a faceplate panel having a luminescent screen with phosphor lines on an interior surface thereof, and a tension focus mask. The mask has spaced apart first metal strands which are adjacent to an effective picture area of the screen and define a plurality of slots substantially parallel to the phosphor lines. Each of the first metal strands across the effective picture area have a substantially continuous insulator layer on a screen-facing side thereof. The mask also includes a plurality of second metal strands oriented substantially perpendicular to the first metal strands. The second metal strands are spaced from the insulator layer when the tube is not energized and are in contact with the insulator layer when the tube is energized.
REFERENCES:
patent: 2669675 (1954-02-01), Lawrence
patent: 5111106 (1992-05-01), Kaplan et al.
patent: 5625251 (1997-04-01), Nosker et al.
patent: 5646478 (1997-07-01), Nosker et al.
patent: 5647653 (1997-07-01), Cherukuri
Masterton Walter David
Ragland, Jr. Frank Rowland
Day Michael H.
Irlbeck Dennis H.
Santiago Mariceli
Thomson Licensing S.A.
Tripoli Joseph S.
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