Patent ID: 6225766
Filing Date: 2001-05-01
Classification: H01J

Abstract:
A color cathode ray tube apparatus comprising:an envelope having a faceplate formed with a phosphor screen, andan electron gun assembly having an electron beam generating portion for generating three electron beams lined up in line and composed of a center beam and a pair of side beams transmitted on one horizontal plane, and a main lens for focusing the electron beams emitted from said electron beam generating portion finally on said phosphor screen,said main lens being constituted by a focusing electrode, at least one intermediate electrode, and a final accelerating electrode sequentially disposed from said electron beam generating portion side toward said phosphor screen, each of said focusing electrode, said intermediate electrode, and said final accelerating electrode being formed with three electron beam holes lined up in line to correspond to the three electron beams, whereina high voltage to be supplied to said final accelerating electrode is divided by a resistor to supply a predetermined voltage to said intermediate electrode, so that voltages of said focusing electrode, said intermediate electrode, and said final accelerating electrode that constitute said main lens sequentially increase from said electron beam generating portion side toward said phosphor screen, and said electron beam holes, on said focusing electrode side, of said intermediate electrode adjacent to said focusing electrode, and said electron beam holes, on said final accelerating electrode side, of said intermediate electrode adjacent to said final accelerating electrode, form vertically elongated holes that are longer in a vertical direction than in a horizontal direction,said resistor being arranged in a tube near said electron gun assembly.