An improved CLEAR gun for 19" high resolution CDT

Author

Chang, Hsiang Lin ; Yeh, Chun Hsien

Author_Institution

R&D Div., Chunghwa Picture Tubes, Taejon, South Korea

fYear

1999

fDate

1999

Firstpage

255

Lastpage

259

Abstract

An electron gun for high resolution 19" Cathode-ray Display Tube (CDT) has been developed, by using an improved “CLEAR” gun design. To avoid cut off uniformity and the cathode loading problem, we choose to maintain the 0.4 mm G1 aperture diameter. For the higher resolution requirement, the depth of the common lens and the object distance were increased. The former will enlarge the equivalence main lens diameter and spherical aberration was reduced. The latter will cause larger object distance, i.e., smaller magnification. According to the modeling results, the spot size of the new gun is 25.8% better in horizontal direction and 8.6% in vertical direction than our conventional “CLEAR” gun

Keywords

aberrations; cathode-ray tube displays; electron guns; 19 in; CLEAR gun design; common lens depth; equivalence main lens diameter; high resolution CRT displays; object distance; spherical aberration reduction; spot size; Apertures; Cathode ray tubes; Delta modulation; Electron optics; Electron tubes; Lenses; Manufacturing; Research and development; Space charge; Vision defects;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Display, 1999. ASID '99. Proceedings of the 5th Asian Symposium on

Conference_Location

Hsinchu

Print_ISBN

957-97347-9-8

Type

conf

DOI

10.1109/ASID.1999.762757

Filename

762757