Sony Corporation

Hiroshi Okazaki

Hiroji Sumiyoshi

Kazuo Omae

Mitsumasa Suzuki

A cathode-ray tube having an explosion-proof band shrink fitted on the periphery of the panel thereof and having recesses formed so as to adjust the effective sectional area of the explosion-proof band to a value appropriate for correcting the strain of the panel caused by the evacuation of the tube body of the cathode-ray tube. The size of the recesses is determined on the basis of a misalignment correction estimated theoretically by using measured data of deformation of the panel, so that the deformation of the panel surface is corrected appropriately, and thereby misalignment of electron beams is minimized.

Cathode-ray tube with misalignment correcting tension band

An improved cathode ray tube consisting of a panel member coated on its inner surface with a phosphor layer, and having a funnel member and a neck member with an electron gun mounted therein in which an image is formed on the phosphor layer by an electron beam emitted from the electron gun and comprising fittings located at the corners of the panel member with a tension band tightened to the panel member over the fittings with each of the fittings having first portions substantially parallel to the tubular axis of the cathode ray tube and second portions extending from the first portion and extending in the direction perpendicular to the tubular axis of the tube to form a substantially L-shaped member in cross-section. The first portion has curved surfaces which conform with a peripheral wall surface of the cathode ray tube at its top end portions and indented portions which distribute bearing stresses of a tension band uniformly over the tube to eliminate problems arising during explosion.

Growing community of inventors

Matsudo, Japan

Hiroshi Okazaki