Recent developments in oxide cathode research for CRT applications

Most of the improvement trends of cathode ray tubes (CRTs), which are still unsurpassed in cost efficiency and in front of screen performance, also require improved cathodes. In this paper, some of the recent work published by CRT companies is reviewed and details of more recent studies undertaken within LG–Philips Displays are given, which are aimed at improving the performance of the oxide cathode. In particular, the focus is directed on two main areas, namely the interface between cap and spray layer, and the composition and modification of the spray layer itself.