... 1. Supply EL panel making technology 2. Raw material (el phosphor, ITO film, Medium power ... supply EL panel making technology and EL panel making raw material (EL phosphor, ITO film, Medium power, Silver ... paste etc) . The special material developed by KPT combines with kinds of EL phosphor ... kinds of EL display applied of the special material is Voltage 40V-400V, Frequency 50Hz-4KHz ...