Color picture tube device with static convergence adjuster

Details Color picture tube device with static convergence adjuster Color picture tube device with static convergence adjuster

1989-11-21

1992-10-20

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313421, 313428, H01J 2968

Patent

active

051573024

ABSTRACT:
A color picture tube device equipped with a static convergence adjuster for outer electron beams. The magnetic lines of force of the quadrupole field produced by the adjuster have substantially straight vertical portions. The device is capable of suppressing broadening of the vertical diameters of the spots of the outer beams. Deterioration in the resolution concomitant with adjustment of the convergence of the outer beams can be suppressed.

REFERENCES:
patent: 3305744 (1967-02-01), Werst
patent: 3354336 (1967-11-01), Rennick
patent: 3505560 (1970-04-01), Marvin
patent: 4625144 (1986-11-01), Kornaker
patent: 4670726 (1987-06-01), Ogata et al.
patent: 4766343 (1988-08-01), Belica

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