Magnetic focusing, three in-line gun type color picture tube

Details Magnetic focusing, three in-line gun type color picture tube Magnetic focusing, three in-line gun type color picture tube

1981-12-09

1984-07-17

LaRoche, Eugene R.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, 313417, 313457, H01J 2951, H01J 2968

Patent

active

044608446

ABSTRACT:
A color television picture tube of three in-line gun type wherein a ring-shaped ferrite permanent magnet or magnets are disposed around a neck portion of the tube, at least a pair of mutually-opposing pole pieces made of highly permeable magnetic material are provided within the tube neck portion as a part of the gun assembly so as to be magnetized by the ring magnet or magnets and to form an electron beam magnetic focusing lens system. In the picture tube, the pole pieces are each of a substantially elliptical cross section as viewed from a plane perpendicular to the tube axis, and spaces are provided between an inner wall of the tube neck portion and the pole pieces to accommodate support rods for gun assembling. There are selected to fall in particular ranges the ratio of the outer diameter to inner diameter of the permanent magnet, the ratio of the thickness to inner diameter thereof, the ratio of the thickness to gap length between the opposing pole pieces, and the ratio of the tube-axial length of the pole piece disposed on the side of a phosphor screen to the tube-axial length of the pole piece disposed on the side of cathode electrodes.

REFERENCES:
patent: 4096408 (1978-06-01), Bozzay et al.

Affiliated with

Also associated with

Rating

Magnetic focusing, three in-line gun type color picture tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic focusing, three in-line gun type color picture tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic focusing, three in-line gun type color picture tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1493253