| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an automatic lighting switch device which realizes an arbitrary switching operation easily while an illuminance sensitive type automatic lighting switch device on the market is used. SOLUTION: This has two illuminance induction type lighting switch devices wherein, while either switch-on standard luminance or switch-off standard luminance is manually set, the other is automatically set, and a calculation of a logic circuit to do a logical operation of the output of these two automatic lighting switch devices is equipped, and therefore the lighting load based on the result of the calculation of the output of the two automatic lighting switch devices is automatically switched on.</p> |
