PERFECCIONAMIENTOS INTRODUCIDOS EN UN TUBO PARA IMAGENES DE TELEVISION EN COLOR.

摘要

A mask type color picture tube has a mask electrode attached to a peripheral frame having an L-shaped cross-section which is suspended within the tube adjacent a screen of the tube. The mask includes a curved apertured portion. At least an outer area of the apertured portion lies in a curved plane that passes substantially behind a part of the frame closest to the screen.