Definitions for "Invar Shadow Mask"
Keywords:  crt, phosphor, shadow, mask, blur
Conventional shadow masks heat up and expand in large tube sets, resulting in inaccurate colour and blurred images. Shadow masks made out of the Invar alloy hold their shape and ensure true, focused colours. Found only in the better large tube sets.
a premium feature available on select television models that is designed to give the picture more brightness and a crisper appearance
Holes in the thin metal sheet behind the glass of the CRT surface corresponds to each phosphor dot on the inner surface of the CRT's faceplate, allowing the correct electron beam (red, green and blue) to hit the correct color phosphor for improved focus, brightness and color.