发明名称 |
Discharge lamp lighting device and illumination fixture |
摘要 |
[Object] To provide a discharge lamp lighting device and an illumination fixture in which an output current to a discharge lamp in shifting to a steady operation can be provided in a positive-negative symmetrical state while suppressing a duration time of an electrode heating operation to be relatively short. [Means for Settlement] There are provided a control part 3 for performing, at start of a discharge lamp La, after performing a starting operation to start discharge in the discharge lamp La and before starting a steady operation to output rectangular wave AC power for maintaining lighting to the discharge lamp La, an electrode heating operation of heating electrodes of the discharge lamp La by making a frequency of AC power outputted to the discharge lamp La higher than a frequency in the steady operation, and a half-wave discharge detecting part 2 for detecting half-wave discharge in the discharge lamp La. When the half-wave discharge detecting part 2 detects half-wave discharge in the electrode heating operation, the control part 3 performs a half-wave discharge improving process which resolves half-wave discharge by making a small peak value as a lower peak value out of peak values of both polarities of a current outputted to the discharge lamp La larger. |
申请公布号 |
EP2192821(A2) |
申请公布日期 |
2010.06.02 |
申请号 |
EP20090013471 |
申请日期 |
2009.10.26 |
申请人 |
PANASONIC ELECTRIC WORKS CO., LTD. |
发明人 |
DAISUKE, YAMAHARA;NAOKI, KOMATU |
分类号 |
H05B41/288;H05B41/392 |
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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