INTERNAL MAGNETIC SHIELD FOR DISPLAY DEVICES WITH ORTHOGONAL SCANNING

摘要

A display device comprises an envelope including a faceplate panel and a neck connected by a funnel. The faceplate panel has a screen with horizontally oriented luminescent elements. An electron gun assembly is positioned in the neck and directs electron beams toward the screen where the electron beams are scanned vertically. An internal magnetic shield has opposing short sides and opposing long sides. The short sides extend substantially vertically and the long sides extend substantially horizontally. Each of the short sides has at least one cut-out extending generally horizontally therethrough. The internal magnetic shield thereby minimizes the effect of an ambient magnetic field to ensure that the electron beams are accurately directed toward the screen, particularly at corners of the screen.