Patent ID: 6333594
Filing Date: 2001-12-25
Classification: H01J

Abstract:
A color cathode ray tube including an envelope extending from a rear tube portion to an opposed front tube portion including a substantially rectangular effective panel portion having an effective outer surface portion that is flat or only slightly curved and an effective inner surface portion, a shadow mask having an effective mask surface with apertures therein, an electron beam gun spaced from the shadow mask along a tube axis in a direction toward said rear tube portion, said electron beam gun being configured to generate electron beams, at least some of which pass through the apertures toward the effective inner surface portion,wherein the effective inner surface portion has an associated major axis and associated major axis coordinate defining a relative position of a major end point of the effective inner surface portion and an associated minor axis and associated minor axis coordinate defining a relative position of a minor end point of the effective inner surface portion, said major axis and said minor axis intersecting said tube axis at a central point on the effective inner surface portion, with the major end point relative position and the minor end point relative position including a tube axis coordinate in addition to coordinates related to the other axes, and with the tube axis coordinate of the major end point being spaced from the central point on the tube axis a distance measured toward the rear tube portion that is less than the distance of spacing of the minor end point from the central point measured toward the rear tube portion.