A novel quasi-Einzel type electron gun design for color projection CRT´s

Author

Chen, H.Y. ; Gorski, R. ; Babicz, E.

Author_Institution

Zenith Electron., Melrose Park, IL, USA

fYear

1991

fDate

15-17 Oct. 1991

Firstpage

27

Lastpage

30

Abstract

A quasi-Einzel type electron gun has been designed for color projection CRTs (cathode ray tubes). Due to the reduced magnification factor and space charge effect, plus a strong prefocusing BFR, this gun had a 35% improved low-current (100- mu A) spot and 25% improved high-current (5-mA) spot compared to the conventional Hi-UPF projection gun. This gun uses conventional oxide cathode and conventional electron gun manufacturing technology. This will reduce the production cost and minimize many of the long-term performance uncertainties of a newly developed gun. Although this gun was developed as a monochrome projection gun, the authors believe that through a minor reoptimization this design can be used for the color inline gun system.<>

Keywords

cathode-ray tubes; colour television picture tubes; electron guns; electron optics; color inline gun system; color projection CRT; monochrome projection gun; oxide cathode; production cost; quasi-Einzel type electron gun; reduced magnification factor; reoptimization; space charge effect; Cathode ray tubes; Convergence; Costs; Electrons; Electrostatics; Lenses; Manufacturing; Optical design; Space charge; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Display Research Conference, 1991., Conference Record of the 1991 International

Conference_Location

San Diego, CA, USA

Print_ISBN

0-7803-0213-3

Type

conf

DOI

10.1109/DISPL.1991.167424

Filename

167424