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Home > Terms > English, UK (UE) > Shadow mask
Shadow mask
A part of a CRT TV tube. This is a barrier within the tube, placed between the electron guns at the narrow end and the phosphor screen at the wide end. It consists of plate with thousands of perforations. The geometric arrangement permits the electrons emitted for each colour gun to activate only its matching colour phosphors. This is an alternative to the aperture grille.
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