Patent ID: 6680565
Filing Date: 2004-01-20
Classification: H01J

Abstract:
A cathode ray tube comprising:a faceplate panel comprising a substantially flat exterior surface and a substantially concave interior surface having a phosphor screen; a funnel sealed to a the faceplate panel, the funnel having a neck portion; an electron gun mounted in the neck portion of the funnel; a shadow mask between the faceplate panel and the electron gun, the shadow mask having an effective electron beam-passing area comprising a plurality of apertures; and a deflection yoke around an outer periphery of the funnel; wherein the panel satisfies the following condition: 1.2R&lE;Rp&lE;8R where Rp is a curvature radius of the concave interior surface and R is 1.767Ã—a diagonal width of an effective screen of the cathode ray tube; and the shadow mask satisfies the following condition: 0.6&lE;(Rs/Rp)Ã—(PH/S/PH/C)&lE;1.25 where Rs is a curvature radius of the shadow mask, PH/C is a horizontal pitch of the apertures formed on a central portion of the shadow mask, and PH/S is a horizontal pitch of the apertures formed on a peripheral portion of the shadow mask.