发明名称 |
Excess light turn-off circuit |
摘要 |
An illumination control device controls the level of artificial lighting depending upon the intensity of natural light in the area being controlled. A single adjustment is used to set the switching point at which the illumination control device becomes operative. An indicator is provided to indicate the adjustment status before a change in the artificial light condition occurs. A filter is employed to produce turn-on and turn-off time delays which differ from one another and are automatically changed in accordance with the instantaneous light level which exists prior to a necessary circuit switching operation.
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申请公布号 |
US4449074(A) |
申请公布日期 |
1984.05.15 |
申请号 |
US19830468870 |
申请日期 |
1983.02.23 |
申请人 |
LUTRON ELECTRONICS CO., INC. |
发明人 |
LUCHACO, DAVID G. |
分类号 |
H05B37/02;(IPC1-7):H05B37/02 |
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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