发明名称 |
Controllable power supply circuit for an illumination system and methods of operation thereof |
摘要 |
A method for reducing acoustic noise produced during use of a lamp dimmer detects whether the dimmer is a leading edge (101) or a trailing edge dimmer (102). A nominal firing time of a leading edge dimmer is determined and a post-correction applied to a voltage applied to the dimmer starting from the nominal firing time so as to build-up the voltage gradually during a predetermined post-correction time period and thereby reduce the rate of rise of the leading edge thereof. A nominal cutoff time of a trailing edge dimmer is determined and a pre-correction applied to a voltage applied to the dimmer starting from the nominal cut-off time so as to diminish the voltage gradually during a predetermined pre-correction time period and thereby reduce the rate of rise of the leading edge thereof. Other methods are disclosed for soft starting filament lamps and controlling dimmer circuits. |
申请公布号 |
IL163558(D0) |
申请公布日期 |
2005.12.18 |
申请号 |
IL20040163558 |
申请日期 |
2004.08.16 |
申请人 |
LIGHTECH ELECTRONICS INDUSTRIES LTD. |
发明人 |
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分类号 |
H02M5/293;H05B39/02;H05B39/04;H05B39/08;(IPC1-7):H02P |
主分类号 |
H02M5/293 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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