同其它各种视频显示器件比较起来,CRT 在分辨率和对比度等方面都是很出色的,制造成本也最低。但是,相对于图象有效显示面积来说,其厚度较大这样一种结构上的局限性,却是历来 CRT 的弱点。另一方面,视频设备的用途在不断扩大,在厨房电视和守门摄象机的监视器、汽车及鱼群探测仪等新用途方面,人们迫切希望 CRT 薄型化,以作为薄型显示器件满足新用途的需要。 Compared with a variety of other video display devices, CRT in the resolution and contrast, etc. are very good, the lowest manufacturing costs. However, with respect to the effective display area of ​​the picture, the structural limitation of larger thickness is always the weakness of CRT. On the other hand, the use of video equipment is constantly expanding. In terms of new uses such as monitors for kitchen TVs and gatekeepers, cars and fish finders, there is a strong desire for thinner CRTs to satisfy new uses as thin display devices Need.