Tension mask and frame with mechanical connection means

摘要

A color selection means is described in which the mask (50) is stretched under tension and connected to a support frame. The support frame accurately determines the mask contour, while the mask is connected to this frame in a flexible way by mechanical means so that differences in expansion behavior of the mask and the frame can be handled. These connection means can be either lugs or resilient elements (59).Such a color selection means may be used in a color display tube having an at least substantially flat display screen.