Uniaxial tension focus mask for color CRT and method of making s

Details Uniaxial tension focus mask for color CRT and method of making s Uniaxial tension focus mask for color CRT and method of making s

1995-07-26

1997-04-29

Ramsey, Kenneth J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

445 37, H01J 918

Patent

active

056252510

ABSTRACT:
A color cathode-ray tube 10 has an evacuated envelope 11 with an electron gun 26 therein for generating at least one electron beam 28. The envelope further includes a faceplate panel 12 having a luminescent screen 22 with phosphor lines on an interior surface thereof. A uniaxial tension focus mask 25, having a plurality of spaced-apart first metal strands 40, is located adjacent to an effective picture area of the screen 22. The spacing between the first metal strands 40 defines a plurality of slots 42 substantially parallel to the phosphor lines of the screen. Each of the first metal strands 40, across the effective picture area of the screen, has a substantially continuous first insulator layer 64 on a screen-facing side thereof. A second insulator layer 66 overlies the first insulator layer 64. A plurality of second metal strands 60 are oriented substantially perpendicular to the first metal strands 40 and are bonded thereto by the second insulator layer 66.

REFERENCES:
patent: 4197482 (1980-04-01), Koorneef et al.
patent: 4207656 (1980-06-01), van Esdonk et al.
patent: 4374452 (1983-02-01), Koorneef
patent: 4443499 (1984-04-01), Lipp
patent: 4473772 (1984-09-01), de Keijzer
patent: 4621214 (1986-11-01), Bloom et al.
patent: 4650435 (1987-03-01), Tamutus
patent: 5045010 (1991-09-01), Fairbanks

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