| 摘要 |
PROBLEM TO BE SOLVED: To provide a discharge tube lighting apparatus that outputs a reverse-phase voltage at either end of the discharge tube, with a simple structure at low cost. SOLUTION: The discharge tube lighting apparatus, loaded on a sheet of base plate for lighting the discharge tube 3 by converting direct current into alternating current to output reverse-phase voltage at either end of the discharge tube 3, includes transformers Ta, Tb each with a primary winding P and a secondary winding S, resonant reactors L1, L2, and resonant capacitors C9a, C4a, C9b, C4b, as well as two resonant circuits 15, 16 to whose outputs the discharge tube is connected, and which output reverse-phase voltages at either end of the discharge tube. So as resonant characteristics of the two resonant circuits to coincide, values of resonant reactors of the two resonant circuits are to be differentiated in accordance with floating capacitances Cs1, Cs2 based on difference of lengths of high-voltage output wirings from the resonant circuits to the discharge tube. COPYRIGHT: (C)2010,JPO&INPIT |
