Patent ID: 6507144
Filing Date: 2003-01-14
Classification: H01J

Abstract:
A cathode ray tube comprising:a vacuum envelope having a face panel including a substantially rectangular effective portion having horizontal and vertical axes which cross at right angles and pass a tube axis, a funnel connected to the face panel, a neck connected to a smaller-diameter end of the funnel, and a phosphor screen formed on an inner surface of the effective portion of the face panel, the funnel including a yoke mounting portion extending from the smaller-diameter end connected to the neck toward the face panel; an electron gun arranged within the neck, for emitting an electron beam to the phosphor screen; and a deflection yoke mounted on an outer surface of the neck and the yoke mounting portion of the funnel, for deflecting the electron beam emitted from the electron gun along the horizontal vertical axes so as to cause the electron beam to scan the phosphor screen; at least one cross section of the yoke mounting portion, perpendicular to the tube axis, having a substantially rectangular outer contour which includes a pair of first opposed sides that traverse the horizontal axis, and a pair of second opposed sides that traverse the vertical axis, and a substantially rectangular inner contour which includes four corner sides formed by a recessed portion with a certain width and depth toward the tube axis in outward direction, wherein, when a depth of the recessed portion is S and a thickness of the funnel is T, the recessed depth of the inner surface of the yoke mounting portion is at the range of 0.1Ã—T mm&lE;S&lE;0.5Ã—T mm.