| 摘要 |
<p>PURPOSE:To improve safety by preventing the danger of generating malfunction in an electronic equipment and destroying important data, etc., in any case by interrupting the power supply of the equipment with a second voltage detection circuit while detecting that the voltage of a power supply voltage is further dropped rather than a second reference value after the alarm of a display device. CONSTITUTION:When it is detected by a voltage detection circuit 3 that the voltage of a power supply battery 1 is dropped lower than the reference value, the alarm is issued by displaying that the voltage of the power supply battery is dropped, on a display device 4. Then, the second voltage detection circuit 3b is provided to detect whether the voltage of the power supply battery is dropped lower than the second reference value lower than the reference value of the voltage detection circuit 3 or not, and when the second voltage detection circuit 3b detects that the voltage of the power supply battery 1 is dropped lower than the second reference value, the power supply of the electronic equipment is interrupted. Thus, by forcedly interrupting the power supply when the voltage is further dropped, it can be prevented that the important data, etc., is destroyed by generating the malfunction in the equipment by any chance.</p> |
