SHADOW MASK FOR FLAT TUBE

摘要

PURPOSE: A shadow mask for flat tube is provided to obtain uniform luminance of overall screen and prevent a screen shake due to μ-phonic phenomenon. CONSTITUTION: The shadow mask for flat tube comprises: a shutter plate having a plurality of penetration holes in its center(a) being electron beams are passed through; and a tension type shutter plate having linear penetration holes in its both sides(b,c). Thereby, it is possible to prevent the screen shake and improve the uniformity of the overall screen.