发明名称 |
HIGH-PRESSURE DISCHARGE LAMP OPERATION DEVICE AND ILLUMINATION APPLIANCE HAVING THE SAME |
摘要 |
<p>A full bridge circuit composed of four switching elements (Q1 to Q4) is alternated with a high switching frequency and a series-connected resonance circuit (5) composed of an inductor (L2) and a capacitor (C2) is made to resonate for a switching frequency of the full bridge circuit multiplied by an integer (for example, frequency multiplied by three), thereby generating a high voltage pulse for start. After a high-pressure discharge lamp (DL) is started, the full bridge circuit is alternated with a low switching frequency so as to operate as a step-down chopper for inverting the output polarity, thereby stably supplying rectangular wave voltage of low frequency to the high-pressure discharge lamp (DL) via a filter circuit composed of an inductor (L1) and a capacitor (C1).</p> |
申请公布号 |
WO2004039130(A1) |
申请公布日期 |
2004.05.06 |
申请号 |
WO2003JP12319 |
申请日期 |
2003.09.26 |
申请人 |
MATSUSHITA ELECTRIC WORKS, LTD.;KUMAGAI, JUN;KISHIMOTO, AKIHIRO;KONISHI, HIROFUMI |
发明人 |
KUMAGAI, JUN;KISHIMOTO, AKIHIRO;KONISHI, HIROFUMI |
分类号 |
H02M1/00;H02M1/42;H02M7/5387;H05B41/288;H05K1/02;H05K3/30;H05K3/36;(IPC1-7):H05B41/24;H01F38/08;H02M7/48;H05K1/14;F21V23/00;H05B41/231 |
主分类号 |
H02M1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|