In a ballast circuit for supplying a high pressure discharge lamp and comprising an up-converter and a bridge circuit, the output voltage of the up-converter is controlled at a higher level immediately after the ignition of the lamp and at a lower level during stationary operation. Stabilization of the discharge immediately after ignition of the lamp and a relatively small power dissipation are both realized in this ballast circuit.
申请公布号
WO03075619(A1)
申请公布日期
2003.09.12
申请号
WO2003IB00495
申请日期
2003.02.07
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;VAN CASTEREN, DOLF, H., J.;COUWENBERG, WINSTON, D.
发明人
VAN CASTEREN, DOLF, H., J.;COUWENBERG, WINSTON, D.