Patent ID: 6707242
Filing Date: 2004-03-16
Classification: H01J

Abstract:
A color cathode ray tube comprising:an evacuated envelope including a panel having an inner surface coated with a fluorescent layer for a plurality of colors, a neck in which is housed an electron gun which emits electron beams in a direction of a tube axis of the color cathode ray tube, and a funnel connecting the panel and the neck; and a shadow mask assembly disposed in the inside of the panel, the shadow mask assembly including a shadow mask and a frame being; the shadow mask having, in its main surface opposed to the fluorescent layer, an approximately rectangular apertured region having a multiplicity of color selecting apertures, an unapertured region which surrounds the apertured region, and a skirt portion which is bent in the direction of the tube axis from a periphery of the unapertured region, a transitional portion made of at least two inclined surfaces being provided in a boundary portion between the unapertured region and the skirt portion, and the transitional portion has an outside inclined surface on a side closer to the skirt portion and an inside inclined surface on a side closer to the apertured region, and an angle of the outside inclined surface with respect to the tube axis and an angle of the inside inclined surface in the skirt portion side against the tube axis are both greater than 90Â°.