| 摘要 |
<p>To provide a portable electronic device which is easily shifted into a power save mode at the discretion of an operator, such as a user and reduces power consumption at an optimum state in accordance with the state of use by each operator.An operator, such as a user, can force an electronic device into a power save mode at the operator's own discretion by manipulating a control. Electrical energy stored is thus reliably saved in accordance with the usage by the operator, and power consumed in vain is more efficiently reduced than in a method in which a device automatically stops a time displaying and is shifted into a power save mode in accordance with the presence or absence of power generation. With the time limit within which the operational state of the control needs to be complete, the operator is free from an erroneous shift into the power save mode, and the ease of use of the time measurement device is still assured. <IMAGE></p> |
