Cathode ray tube faceplate having particular black matrix hole transmittivity in the peripheral areas

摘要

A cathode ray tube comprising a panel portion that has a phosphor screen formed over the inner surface of the faceplate 1A. The faceplate 1A is formed such that the radius of curvature Ri of its inner surface 1A1 is almost equal to or larger than the radius of curvature Ro of its outer surface 1A2 and that the black matrix hole transmittivity is defined at a specified level. The cathode ray tube is provided with a simple means which allows the brightness in the peripheral area of the faceplate 1A to match the brightness in the central area and which, even when the deflection angle is large, can reduce the deflection voltage supplied to the deflection yoke and thereby reduce the leakage magnetic field from the deflection yoke.