The influence of high scanning frequencies on the luminescence saturation properties of phosphors for CRT projection systems

Author

Doyle, T. ; Klaassen, D.B.M. ; Lammers, M. G J

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

Volume

36

Issue

9

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

1876

Lastpage

1881

Abstract

The saturation of the luminescence of phosphors greatly reduces the maximum attainable luminance level as well as the resolution of projection-television systems with present-day scanning standards. It is shown, both experimentally and theoretically, that the use of high scanning frequencies (up to 62.5 kHz) considerably alleviates the saturation problems, especially for the blue phosphor (ZnS:Ag), where a gain of more than two in light output has been measured. Consequently, a significant improvement in the white-density capability and resolution of CRT-based projection systems can be achieved

Keywords

cathode-ray tube displays; luminescence of inorganic solids; optical projectors; phosphors; CRT projection systems; ZnS:Ag; light output; luminescence saturation properties; maximum attainable luminance level; phosphors; projection-television systems; resolution; scanning frequencies; white-density capability; Brightness; Cathode ray tubes; Frequency measurement; Gain measurement; HDTV; Large screen displays; Luminescence; Phosphors; TV; Zinc compounds;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.34262

Filename

34262