Cathode-ray tube having cylindrical faceplate and shadow mask with minor axis curvatures

摘要

A shadow mask type cathode-ray tube includes a rectangular faceplate having curvature along its minor axis but no curvature along its major axis. The shadow mask of the tube also has curvature along its minor axis and no curvature along its major axis. The mask is of a type of steel having a linear coefficient of thermal expansion of less than 3×10. sup.-6 &Dgr;l/l/°C.