图象质量随着显象管尺寸的增大而恶化的问题通过技术上的改进已获解决,新型高清晰度电视(HDTV)和扩展清晰度电视(EDTV)已成为日立公司的基础产品。不断需求屏幕较大的彩色电视和高的图象质量,推动了技术上的发展。仅在过去的一年中,像29、32、33英寸以及尺寸更大些的管子一个接着一个地投放市场。图1示出了高性能电视机的基本构思。显象管制造者正继续努力以满足这些电视的需要。 The problem of deteriorating the image quality with the size of the picture tube has been solved by technical improvements. The new HDTV and EDTV have become the foundations of Hitachi. Continued demand for larger screen color television and high image quality, and promote the technological development. In the past year alone, tubes of 29, 32, 33 inches and larger sizes were put on the market one by one. Figure 1 shows the basic idea of ​​a high-performance television set. CRT makers are continuing their efforts to meet the needs of these TVs.