Patent ID: 6870331

Claim:
A cathode ray tube comprising: a tube envelope having a faceplate and a screen electrode on the faceplate configured to be biased at a screen potential; a source of a beam of electrons directed toward said faceplate, wherein said source is configured for magnetic deflection of said beam of electrons; a non-self converging deflection yoke proximate said source of a beam of electrons for magnetically deflecting said beam of electrons; wherein said source of a beam of electrons and said non-self converging deflection yoke are configured to substantially converge the beam of electrons when the deflected beam of electrons is at or near two opposing edges of said faceplate, rather than at or near the center of said faceplate; phosphorescent material disposed on said faceplate for producing light in response to the beam of electrons impinging thereon; and a first electrode interior said tube envelope, said first electrode defining an aperture through which the beam of electrons passes, wherein said first electrode is intermediate said deflection yoke and said faceplate and is configured to be biased at a potential one of greater than and less than the screen potential.