Projection cathode-ray tube with green emitting phosphor screen

摘要

This invention relates to a phosphor prepared by mixing a green emitting phosphor InBO3:Tb having an excellent color tone with other green emitting phosphors having a short decay time such as Y3Al5-mGamO12:Tb in amounts such that the "decay time to 10% of peak brightness" measured by a raster spot method is below 10 ms. The phosphor screen of a projection cathode-ray tube is formed by use of this phosphor. The projection cathode-ray tube thus produced has an excellent color tone and a short decay time.