| 摘要 |
<p>Vacuum envelope of an image display device has a back base plate and a front base plate that are opposed to each other, and a side wall disposed between the back and font base plates. The inner surface of the front base plate is formed with an image display screen, while the inner surface of the back base plate is provide with a number of electron emitting elements for emitting electrons to the image display screen. A grid is disposed between the back and front base plates and connected to the back base plate. This grid has a greater heat expansion coefficient than the back base plate.</p> |
