Electric lamp and discharge devices: systems – Cathode ray tube circuits – Plural concentrating – accelerating – and/or de-accelerating...
Patent
1979-08-16
1981-02-24
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Plural concentrating, accelerating, and/or de-accelerating...
313414, H01J 2946, H01J 2956
Patent
active
042530415
ABSTRACT:
An electron gun for a television cathode ray tube is disclosed having cathode means and grid means for producing a beam of electrons. A low-aberration, low-magnification main focus lens means comprising at least three electrodes receives a predetermined pattern of applied voltages to establish a single, continuous electrostatic field having an axial potential distribution which, at all times during tube operation, decreases smoothly and monotonically from a relatively intermediate axial potential to a relatively low-intermediate axial potential spatially located at a lens intermediate position. The axial potential then increases smoothly, directly and monotonically from the relatively low intermediate axial potential to a relatively high axial potential. The gun is characterized by the synthesizing of the relatively low-intermediate axial potential by electrode means comprising a composite electrode made up of an odd-number plurality of apertured elements separated by gaps. The even-numbered ones of the elements have the relatively intermediate applied voltage thereon, and the odd-numbered ones of the elements have a relatively low applied voltage thereon. The spacing of the elements of the composite electrode, and the number of the elements, the aperture size and configurations of the elements, and the periodic applied voltages thereon are such as to produce the relatively low-intermediate axial potential in non-periodic form at the lens intermediate position.
REFERENCES:
patent: 2859378 (1958-11-01), Gundert et al.
patent: 3651359 (1972-03-01), Miyaoka
patent: 3702950 (1972-11-01), Nakamura
patent: 3895253 (1975-07-01), Schwartz et al.
patent: 3932786 (1976-01-01), Campbell
patent: 3995194 (1976-11-01), Blacker, Jr. et al.
A. B. El-Kareh, Electron Beams, Lenses, and Optics, Academic Press, vol. 1, 1970, pp. 32-41.
Blacker Allen P.
Ingle Arthur J.
Blum Theodore M.
Zenith Radio Corporation
LandOfFree
Extended field electron gun having a synthesized axial potential does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extended field electron gun having a synthesized axial potential, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extended field electron gun having a synthesized axial potential will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1411468