公开(公告)号：EP1256109B1

公开(公告)日：2012-07-25

申请号：EP01905538.3

申请日：2001-02-13

申请人： iFire IP Corporation

发明人： CHENG, Chun-Fai

IPC分类号： G09G3/30

CPC分类号： G09G3/30 ,  G09G2330/023

摘要： A driving circuit for powering an electroluminescent display using energy recovered from a varying panel capacitance of the display. The driving circuit comprises a source of electrical energy; and a resonant circuit using the panel capacitance for receiving the electrical energy and in response generating a sinusoidal voltage to power the display at a resonance frequency which is substantially synchronized to a scanning frequency of the display. The resonant circuit uses a step down transformer to reduce the effective panel capacitance of the display in order to reduce its effect on the resonance frequency.