| 摘要 |
<p>A color picture tube (10) comprises an evacuated envelope (11) having an electron gun (26) therein for generating at least one electron beam (28), a faceplate panel (12) having a luminescent screen (22) with phosphor lines on an interior surface thereof, and a tension focus mask (24). The mask has spaced apart first metal strands (40) which are adjacent to an effective picture area of the screen and define a plurality of slots substantially parallel to the phosphor lines. Each of the first metal strands across the effective picture area has a substantially continuous insulator layer (41) on a screen-facing side thereof. The mask also includes a plurality of second metal strands (42) oriented substantially perpendicular to the first metals strands. The second metal strands are spaced from the insulator layer when the tube is not energized and are in contact with the insulator layer when the tube is energized.</p> |
