发明名称 |
HIGH STABILITY DIMMER |
摘要 |
<p>The present invention is aimed at providing a dimmer capable of preventing malfunctions due to noise contamination or waveform distortion of the voltage of an AC power source. The dimmer according to the present invention has a time division control circuit for controlling an effective voltage supplied to a lighting load by regulating the period of time to turn on a switching element, and further includes: a zero-crossing detector section 11 for detecting a zero-crossing point and generating a zero-crossing signal whose value changes at the zero-crossing point; an oscillator 13 for generating an oscillating signal having a frequency equal to that of the AC power source or an integral multiple of this frequency; a reference point determiner section 14 for measuring a phase difference between the zero-crossing signal and the oscillating signal every time the zero-crossing signal is generated, and for determining a reference point for setting the timing of turning on or off the switching element 6 based on a data of the measured value of the phase difference; and a time division control signal generator (on/off timing calculator section 15 and time division control signal generator section 17) for sending an on/off signal to the switching element 6 at the timing determined on the basis of the reference point and the effective voltage to be supplied to the lighting load.</p> |
申请公布号 |
EP2654379(A1) |
申请公布日期 |
2013.10.23 |
申请号 |
EP20110848765 |
申请日期 |
2011.11.16 |
申请人 |
ELM INC. |
发明人 |
MIYAHARA, TAKAKAZU;KIRIHARA, HIROSHI;HASHIGUCHI, MITSUHIRO |
分类号 |
H05B37/02;G01R25/04;G05B24/02;H03L7/00;H05B33/08;H05B41/392 |
主分类号 |
H05B37/02 |
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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