Projection television system and a cathode-ray tube with interference filter.

摘要

A projection television system comprising a cathode-ray tube having a face plate, a display screen coated with a phosphor of the type ZnS:Ag and an interference filter arranged between the display screen and the face plate. The ZnS:Ag has an admixture which slightly increases the y-coordinate of the light emitted by the phosphor. This enables an increased maximum luminance in the white-D-point without the y-coordinate of the light emitted by the cathode-ray tube becoming too low.