发明名称 |
High pressure discharge lamp lighting device |
摘要 |
<p>To shorten the luminous flux rise time and prevent melting/deformation of the projections in the initial ignition period of high pressure discharge lamps that have a sealed mercury volume of no less than 0.20 mg/mm 3 , a power supply device feeds a current that exceeds the maximum current value of the constant power control period to the high pressure discharge lamp during a first control period from the initial discharge until the lamp voltage reaches a specified lamp voltage and causes a switch to constant power control, and then, during the following period until a change to steady power control, the power supply device feeds it a current that is less than the maximum current during regular operation.</p> |
申请公布号 |
EP1855509(A1) |
申请公布日期 |
2007.11.14 |
申请号 |
EP20070008870 |
申请日期 |
2007.05.02 |
申请人 |
USHIODENKI KABUSHIKI KAISHA |
发明人 |
SUGAJA, KATSUMI;TAKAYA, IZUMI;ARIMOTO, TOMOYOSHI |
分类号 |
H05B41/38 |
主分类号 |
H05B41/38 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|