| 摘要 |
PROBLEM TO BE SOLVED: To supply power to a second timer part externally attached in a position different from a first timer part equipped in a circuit that performs predetermined operation, in different manners according to solar power generation condition, and to actuate the second timer part with low power consumption.SOLUTION: An image forming device includes a charging part 112, a charging amount detection part 113, a first timer part, a second timer part, an internal battery, a first power source switching part 117, a second power source switching part 118, a power-saving determination part 130, a voltage determination part 131 that determines whether a charging voltage amount in the charging part is equal to or larger or less than a reference voltage value, and a power source switching control part 132 that supplies power from the charging part 112 to the second timer part when the charging voltage amount of the charging part 112 is equal to or larger than the reference voltage value while no power is supplied from commercial power source during energy-saving mode, and supplies power from the internal battery to the second timer part when the charging voltage amount of the charging part 112 is less than the reference voltage value. |
