A COLOUR SELECTION MEANS FOR A CATHODE RAY TUBE COMPRISING A TENSION MASK

摘要

A colour 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 behaviour of the mask and the frame can be handled. These connection means can be either lugs or resilient elements (59). Such a colour selection means may be used in a colour display tube having an at least substantially flat display screen.