发明名称 |
CIRCUIT ARRANGEMENT AND METHOD FOR OPERATING A HIGH-PRESSURE DISCHARGE LAMP |
摘要 |
<p>A circuit arrangement for operating a high pressure discharge lamp includes a bridge circuit with at least two switches, a control device controlling the switches. The bridge circuit is a half-bridge circuit having exactly two switches. The control device switches on and off in an alternating manner, the first switch and the second switch of the bridge circuit having a first frequency. When the first switch is switched off for controlling the other switch with a rectangular signal of a second frequency which is greater than the first frequency and a predeterminable connection duration. The circuit also includes a tension measuring device measuring an actual value of tension over the high pressure discharge lamp. A reference device provides at least one upper threshold value for the voltage via the high pressure discharge lamp. A comparison device compares the actual voltage over the high pressure discharge lamp with the threshold value.</p> |
申请公布号 |
EP1994805(B1) |
申请公布日期 |
2009.12.30 |
申请号 |
EP20070712190 |
申请日期 |
2007.02.08 |
申请人 |
OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG |
发明人 |
BRAUN, ALOIS;MUEHLSCHLEGEL, JOACHIM;LIMMER, WALTER |
分类号 |
H05B41/288 |
主分类号 |
H05B41/288 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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