Title :
The influence of high scanning frequencies on the luminescence saturation properties of phosphors for CRT projection systems
Author :
Doyle, T. ; Klaasen, D.B.M. ; Lammers, M.J.G.
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
Abstract :
A novel method for computing the light output on a CRT projection tube is verified and used to predict the performance of different phosphors for different scanning parameters. This model is based on measured phosphor saturation data, and can be used to predict not only the light output but also the modulation depth for a given frequency. It is shown, both experimentally and theoretically, that the use of high scanning frequencies (up to 62.5 kHz) considerably alleviates saturation problems, especially for the blue phosphor (ZnS:Ag), where a gain of more than 2 in light output has been measured. Consequently, a significant improvement in the white-D capability and resolution of CRT based projection systems can be achieved.<>
Keywords :
cathode-ray tube displays; optical projectors; phosphors; 62.5 kHz; CRT projection systems; ZnS:Ag; luminescence saturation; phosphors; projection tube; resolution; saturation data; scanning frequencies; white-D capability; Brightness; Cathode ray tubes; Frequency measurement; Gain measurement; HDTV; Laboratories; Large screen displays; Luminescence; Phosphors; TV;
Conference_Titel :
Display Research Conference, 1988., Conference Record of the 1988 International
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/DISPL.1988.11266
