Invention Grant
US08482940B2 Illumination lighting device, discharge lamp lighting device, and vehicle headlamp lighting device using same
有权
照明照明装置，放电灯照明装置和使用其的车辆用前照灯照明装置
- Patent Title: Illumination lighting device, discharge lamp lighting device, and vehicle headlamp lighting device using same
- Patent Title (中): 照明照明装置，放电灯照明装置和使用其的车辆用前照灯照明装置
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Application No.: US13123254Application Date: 2009-10-26
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Publication No.: US08482940B2Publication Date: 2013-07-09
- Inventor: Toshiaki Nakamura
- Applicant: Toshiaki Nakamura
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2008-276179 20081027
- International Application: PCT/JP2009/068331 WO 20091026
- International Announcement: WO2010/050432 WO 20100506
- Main IPC: H02M3/335
- IPC: H02M3/335 ; H02M7/44
Abstract:
A lighting device includes a power converter with an input and an output. The output connects to a load circuit that includes a lamp. An output of the power converter is regulated based on results of first and second current detectors. One end of the output and one end of the input are connected to one end of the load circuit via the first and second current detectors, respectively. Detection outputs of the current detectors are synthesized. A ground-fault current flows through a current pathway from one end of the input of the power converter to the one end of the output of the power converter via the current detectors. The current pathway is formed when a ground fault occurs at a load terminal of the load circuit. Detection signals of the current detectors result from the ground-fault current and are of additive polarities.
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