Flat cathode ray display tubes with integral getter means

Details Flat cathode ray display tubes with integral getter means Flat cathode ray display tubes with integral getter means

1986-09-08

1988-05-10

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313103CM, 313105CM, 313553, 313554, 313558, 313560, 313477R, 313481, 313634, 417 48, 417 51, H01J 2994, H01J 3112

Patent

active

047437979

ABSTRACT:
In a flat cathode ray display tube having an electron gun adjacent a rear wall of the tube's envelope which produces an electron beam travelling across the rear wall before being turned in the opposite direction and then deflected onto a screen carried by faceplate opposite the rear wall, getter means is situated in one or more recesses, each defined at least in part by an elongate rib formed in the rear wall, e.g. by pressing, with the recess wall shielding the getter means directly from the gun to prevent contamination. The rib serves also to strengthen the rear wall. A line scanning deflector is similarly shielded.

REFERENCES:
patent: 2668253 (1954-02-01), Taylor
patent: 3560788 (1971-02-01), Reash et al.
patent: 4128782 (1978-12-01), Fransen et al.
patent: 4608518 (1986-08-01), Fukuda et al.
patent: 4642516 (1987-02-01), Ward et al.

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