Double-quadrupole DAF gun for self-converging color CRTs

Author

Suzuki, Hiroshi ; Ueda, Yasuyuki ; Tominaga, Noboru ; Hiromitsu, Nobuaki ; Sugawara, Koichi

Author_Institution

Matsushita Electron. Corp., Osaka, Japan

fYear

1991

fDate

15-17 Oct. 1991

Firstpage

31

Lastpage

34

Abstract

The authors have developed a novel dynamic astigmatism and focus (DAF) gun for high-resolution tubes, called the dynamic-quadrupole DAF gun, which gives better round spots than existing DAF guns. This has been achieved by using an additional quadrupole lens adjacent to the triode part driven commonly by the same DAF dynamic voltage. Thus, the problem of the elliptically distorted spot-shape still remaining in the DAF gun has been solved. With the new gun a much rounder spot is obtained over the entire screen under a high-resolution tube condition, improving the horizontal resolution and reducing risks of moire appearance while maintaining the self-convergence.<>

Keywords

cathode-ray tubes; colour television picture tubes; electron guns; electron optics; dynamic astigmatism and focus gun; dynamic-quadrupole DAF gun; elliptically distorted spot-shape; high-resolution tubes; horizontal resolution; quadrupole lens; self-converging color CRT; Cathode ray tubes; Degradation; Electrons; Guns; Lenses; Magnetic fields; 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.1991.167425

Filename

167425