| 摘要 |
<p>In a color cathode-ray tube, the effective area (P1) of the panel is formed to be smaller than panel projected area (Pp) of the apertured area of the shadow mask (M in Fig. 8). The effective area (P1) of the panel having straight outlines and right-angled corners to form a rectangular shape, and each of apexes thereof coincides with that of the panel projected area (Pp). To obtain the above rectangular effective area (P1), the present invention adopts means (M1 in Fig. 7 or M2 in Fig. 8) for restricting exposing extent between the light source (S in Fig. 7 or 8) and the panel, in the exposure of black matrix (8). The black matrix (B) is exposed through the shadow mask (M) and further restricted by an auxiliary mask. The phosphors (R, G, B) are exposed without this auxilliary during the manufacture.</p> |
