Patent ID: 7215071
Filing Date: 2007-05-08
Classification: H01J

Abstract:
1. A tension mask frame assembly for a CRT comprising: a substantially rectangular mask support frame having a first coefficient of thermal expansion and including a central major axis and a central minor axis perpendicular to each other, said frame having a pair of opposing long sides extending in parallel to the major axis and a pair of opposing short sides extending in parallel to the minor axis each sides having an outer peripheral surface and an inner peripheral surface; a tension mask supported between a pair of support blade members, the support blade members each being attached to said frame at an attachment point along a respective one of the pair of opposing long sides; and a detensioning member fixed along one of the outer and inner peripheral surfaces of one of the pair of opposing long sides and the pair of opposing short sides and having a second coefficient of thermal expansion whereby said attachment points are drawn toward each other during thermal cycling of said mask frame assembly.