发明名称 |
Digital control of electronic ballasts using AC power lines as a communication medium |
摘要 |
A system for establishing communications between a central lighting controller and a series of electronic dimming ballasts uses an AC power supply line as a communication medium. A MOSFET switched by a control circuit selectively shorts the AC power lines when a rectified version of the power line signal indicates that the power line signal is nearing a zero crossing to create notches in the AC power signal. A simple receiver in each of the ballasts detects the presence or absence of notches in the power signal and interprets the results as digital data indicating a desired dimming level for each of the ballast. The ballasts then adjust their light output accordingly.
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申请公布号 |
US7391168(B1) |
申请公布日期 |
2008.06.24 |
申请号 |
US20060332503 |
申请日期 |
2006.01.13 |
申请人 |
UNIVERSAL LIGHTING TECHNOLOGIES, INC. |
发明人 |
DERNOVSEK JOHN JAY;SHET DEEPAK;BELL BRETT |
分类号 |
H05B37/02;G05B11/01 |
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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