| 摘要 |
<p>The invention relates to a colour display tube comprising a shadow mask (12) placed in front of the display screen (8). The shadow mask (12), at least on the side remote from the display screen, is coated with a glass layer (14) containing a heavy metal.</p><p>The object of such a layer (14) is to reflect electrons incident on it so as to reduce local or overall heating. "When the heavy metal-containing layer is a glass layer, this layer has a smaller tendency to form particles than does a non-vitreous layer of a compound of a heavy metal".</p><p>This is in favour of the picture quality, and the shadow mask is more regid.</p> |
