发明申请
- 专利标题: High pressure discharge lamp lighting device and luminaire using same
- 专利标题(中): 高压放电灯照明装置和灯具使用相同
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申请号: US12585773申请日: 2009-09-24
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公开(公告)号: US20100072913A1公开(公告)日: 2010-03-25
- 发明人: Daisuke Yamahara , Nobutoshi Matsuzaki , Takeshi Kamoi , Satoru Nagata , Naoki Komatsu , Jun Kumagai
- 申请人: Daisuke Yamahara , Nobutoshi Matsuzaki , Takeshi Kamoi , Satoru Nagata , Naoki Komatsu , Jun Kumagai
- 申请人地址: JP Osaka
- 专利权人: Panasonic Electric Works Co., Ltd.
- 当前专利权人: Panasonic Electric Works Co., Ltd.
- 当前专利权人地址: JP Osaka
- 优先权: JP2008-244949 20080924; JP2008-244950 20080924
- 主分类号: H05B41/26
- IPC分类号: H05B41/26
摘要:
A high pressure discharge lamp lighting device includes a DC power source circuit; a power supply circuit for converting an output from the DC power source circuit into a square wave AC output to be supplied to a high pressure discharge lamp; a starting circuit for applying a high voltage output for lamp startup to the high pressure discharge lamp; a control circuit; and a half-wave discharge detection circuit for detecting a half-wave discharge. The detection circuit detects the half-wave discharge at an initial stage of the lamp startup and the control circuit controls the magnitude of a voltage of a square wave half period of one polarity having a load voltage of a larger magnitude and that of a square wave half period of the other polarity having a load voltage of a smaller magnitude to approximate to each other.