Patent ID: 7009332
Filing Date: 2006-03-07
Classification: H01J

Abstract:
1. A cathode ray tube comprising: a panel of which an outer surface is substantially flat and an inner surface has a certain curvature; and a shadow mask arranged with a certain interval from an inner surface of the panel and having a plurality of apertures through which electron beams pass, wherein the shadow mask satisfied a condition of 0.9≦ZmD/(ZmX+ZmY)≦1.1, in which an arbitrary point on a diagonal axis of the shadow mask is supposed to be Dr, points on a long axis and a short axis meeting with perpendiculars drawn to the long axis and the short axis from the point Dr are respectively supposed to be Xr and Yr, and intervals between the respective points Xr, Yr, and Dr and the shadow mask in a tube axis direction are respectively supposed to be ZmX, ZmY, and ZmD.