Patent ID: 6476545
Filing Date: 2002-11-05
Classification: H01J

Abstract:
A tube comprising:a tube envelope having a faceplate and a screen electrode on the faceplate biased at a screen potential; a source of plural beams of electrons directed away from said faceplate, wherein said source is adapted for scanning deflection of said plural beams of electrons; a shadow mask proximate said faceplate having a plurality of apertures therethrough, wherein said shadow mask is biased at the screen potential; phosphorescent material disposed on said faceplate for producing light in response to the plural beams of electrons impinging thereon, wherein said phosphorescent material includes a pattern of different phosphorescent materials on said faceplate that emit different color light in response to the plural beams of electrons impinging thereon through the apertures of said shadow mask; and at least first and second electrodes interior said tube envelope and spaced away from said faceplate for bending the plural beams of electrons towards said faceplate, wherein said first electrode is relatively proximate said source in a direction generally parallel said faceplate and said second electrode is relatively distal said source in a direction generally parallel said faceplate, thereby defining a volume between said faceplate and said electrodes in which the plural beams of electrons may be bent, wherein said first electrode is biased at a potential substantially less than the screen potential, and wherein said second electrode is biased at a potential one of less than and greater than the screen potential.