发明授权
- 专利标题: Discharge lamp ballast device and lighting appliance
- 专利标题(中): 放电灯镇流器和照明器具
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申请号: US11792073申请日: 2005-11-29
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公开(公告)号: US07436123B2公开(公告)日: 2008-10-14
- 发明人: Katsunobu Hamamoto , Kazuhiro Nishimoto , Masahiro Yamanaka , Toshiya Kanja
- 申请人: Katsunobu Hamamoto , Kazuhiro Nishimoto , Masahiro Yamanaka , Toshiya Kanja
- 申请人地址: JP Kadoma-shi
- 专利权人: Matsushita Electric Works, Ltd.
- 当前专利权人: Matsushita Electric Works, Ltd.
- 当前专利权人地址: JP Kadoma-shi
- 代理机构: Edwards Angell Palmer & Dodge LLP
- 优先权: JP2004-351528 20041203; JP2004-361615 20041214; JP2004-361992 20041214; JP2005-187262 20050627; JP2005-256837 20050905
- 国际申请: PCT/JP2005/021832 WO 20051129
- 国际公布: WO2006/059583 WO 20060608
- 主分类号: H05B37/02
- IPC分类号: H05B37/02
摘要:
An inverter controller dives an inverter to operate at a switching frequency selectively from one of a preheating frequency (f1), a starting frequency (f2), and a lighting frequency (f3) which are different from each other, thereby giving a preheating mode, a starting mode, and a lighting mode. A reset means is provided to make the starting mode upon lowering of a voltage supplied to the inverter below a first threshold, while an inverter stop means is provided to stop the inverter upon detection of abnormality of a discharge lamp. A timer generates a signal determining the start of the preheating, starting, and/or lighting modes, and generates a reset signal disable signal for disabling the reset means, an inverter stop disable signal for disabling the inverter stop means. The inverter controller includes a frequency sweep means for varying the switching frequency gradually from the starting frequency to the lighting frequency. The timer disables the reset means only during a period starting from the selection of the preheating frequency and ending when the switching frequency varies to the lighting frequency, and disable the inverter stop means only during a period starting from the selection of the preheating frequency and ending when the switching frequency begins to vary from the starting frequency to the lighting frequency.
公开/授权文献
- US20070296355A1 Discharge Lamp Ballast Device and Lighting Appliance 公开/授权日:2007-12-27