| 摘要 |
A cathode ray tube comprising a panel having a complex curvature at an outer surface of the panel such that the complex outer surface curvature satisfies a condition <maths id="MATH-US-00001" num="1"> <MATH OVERFLOW="SCROLL"> <MROW> <MROW> <MO>"</MO> <MROW> <MN>0.5</MN> <MO><=</MO> <MFRAC> <MROW> <MI>Rx</MI> <MO>+</MO> <MI>Ry</MI> </MROW> <MROW> <MN>2</MN> <MO>x</MO> <MI>Rd</MI> </MROW> </MFRAC> <MO><=</MO> <MN>0.9</MN> </MROW> <MO>"</MO> </MROW> <MO>,</MO> </MROW> </MATH> </MATHS> where "Rx" represents a radius of the outer surface curvature of the panel along a longer axis of the panel, "Ry" represents a radius of the outer surface curvature of the panel along a shorter axis of the panel, and "Rd" represents a radius of the outer surface curvature of the panel along a diagonal axis of the panel. In accordance with this complex curvature, it is possible to reduce the weight of the panel while eliminating generation of an image distortion phenomenon and providing desired apparent flatness. It is also possible to easily design the curvature of the inner surface of the panel and the curvature of a shadow mask used in the cathode ray tube, and thus, to achieve an improvement in doming characteristics and an improvement in drop characteristics.
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