Title:
【発明の名称】安定回路
Document Type and Number:
Japanese Patent JP2003518715
Kind Code:
A
Abstract:
A ballast for powering a high intensity discharge lamp includes at least one voltage divider for sampling a lamp operating condition and producing a sampled signal based on a scaling factor applied to the sampled lamp operating condition. The ballast also includes a controller for driving an inverter in response to the sampled signal. The scaling factor varies based on the mode of lamp operation and is substantially larger during lamp ignition than during steady state lamp operation.
Inventors:
Stein, Mitchell Jay
Application Number:
JP2001547926A
Publication Date:
June 10, 2003
Filing Date:
December 11, 2000
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H05B41/288; H05B41/38; H05B41/24; (IPC1-7): H05B41/24
Attorney, Agent or Firm:
Tadahiko Ito