Unipotential electron gun for short cathode ray tubes

Details Unipotential electron gun for short cathode ray tubes Unipotential electron gun for short cathode ray tubes

1982-04-06

1985-01-29

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313449, H01J 2946, H01J 2956

Patent

active

044968779

ABSTRACT:
A high-performance, unipotential-type electron gun is disclosed. The gun according to the invention comprises a series of apertured electrodes having electrical potentials thereon for establishing electrostatic fields therebetween. The electrodes, which are aligned in spaced relation on an axis, are in the order named, lower end means including a cathode for generating a source of electrons from which an electron beam is formed, apertured plate control and grid electrodes for forming, in conjunction with a cathode and the control electrode, a first cross-over constriction in the beam. The beam exhibits upon divergence from the cross-over constriction a relatively steep cross-over emergence angle. The gun includes a three-element focus lens means for producing a finely focused electron beam. The dimensions, spacings and potentials of the electrodes of the lower end are effective to induce a second constriction of the beam upon entry of the beam into the focus lens for providing, upon subsequent divergence of the beam, a relatively shallow focus lens entry angle effective to provide for optimum filling of the lens by the beam for producing a finely focused beam of electrons.

REFERENCES:
patent: 3919583 (1975-11-01), Hasker et al.
patent: 4124810 (1978-11-01), Bortfeld et al.
patent: 4232246 (1980-11-01), Sakurai et al.
patent: 4277722 (1981-07-01), Hawken et al.
patent: 4287450 (1981-09-01), Kawakami et al.

Affiliated with

Also associated with

Rating

Unipotential electron gun for short cathode ray tubes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Unipotential electron gun for short cathode ray tubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unipotential electron gun for short cathode ray tubes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-508493