Cathode-ray tube wherein plural regions of phosphor screen are scanned independently of one another

摘要

A cathode-ray tube includes an envelope having a rectangular face plate and a rectangular, flat rear plate opposed to the face plate. A phosphor screen is formed on the inner surface of the face plate and has a number striped phosphor layers extending in parallel to one another, and a plurality of regions which are independently scanned by electron beams. A mask support mechanism for supporting a shadow mask in the envelope comprises first mask support members fixed to the inner surface of the rear plate and situated to face first longitudinal ends of the phosphor layers, second mask support members fixed to the inner surface of the rear plate and situated to face second longitudinal ends of the phosphor layers, and central mask support members fixed to the inner surface of the rear plate and situated between the first and second support portions. The shadow mask is supported on the mask support members while being applied with a tensile force in the longitudinal direction of the phosphor layers.