Patent ID: 7355331

Claim:
A cathode-ray tube apparatus, comprising: a front panel with a phosphor screen formed on an inner surface; a funnel connected to the front panel; an electron gun housed in a neck portion of the funnel; and a deflection yoke provided on an outer circumferential surface of the funnel, and including a horizontal deflection coil for deflecting an electron beam emitted from the electron gun in a horizontal direction and a vertical deflection coil for deflecting the electron beam in a vertical direction, wherein, in a cross-section including a tube axis, assuming that T 1 represents a thickness of the funnel taken along a line normal to a point on the outer circumferential surface of the funnel, which is placed at the same position in a tube axis direction as that of an end of the horizontal deflection coil on the phosphor screen side, and T 2 represents a thickness of the funnel taken along a line normal to a point on the outer circumferential surface of the funnel, which is placed at the same position in the tube axis direction as a position 7 mm away from the end of the horizontal deflection coil on the phosphor screen side to the phosphor screen side along the tube axis, the funnel includes at least one cross-section taken along a plane including the tube axis that satisfies a relationship: T 2 /T 1 â‰§1.18.