| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an automatic switch with which the discomfort caused by the flickering can be reduced by flickering a light source, when a light source is set in an on state by a setting means, and the flickering of the light source is stopped when the light source is set in an off state, when the heat ray is detected by a heat ray sensor. SOLUTION: A sensor control circuit 19 turns a switch SW15 into an on-state and transmits an on-control signal to a LED circuit 16 for a specified period, when heat ray is detected by a heat ray detecting circuit 11, only when the result of the decision by an illumination detecting circuit 12 is 'dark'. Accordingly, a luminescent diode blinks, when the result of the decision is 'dark' and the heat ray is detected in a state that the switch SW18 is in an on-state, and stops its flickering when the switch SW18 is in an off-state. Furthermore a sensor control circuit 19 controls a load control circuit 15, so that a switch SW15 is turned off when the heat ray is not detected with the heat ray detecting circuit 11 by the elapsed time of a timer time which is set by a timer time adjustment circuit 14.</p> |
