| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce power consumption even in modes other than, for example, image processing operation in consideration of a power conversion efficiency of a power output means provided in an image processor. <P>SOLUTION: When a main power supply switch is turned on (S101), whether or not power is supplied from a USB cable is determined (S102). When the power is supplied, whether or not supplied power is sufficient is determined (S103). When it is not sufficient, the process proceeds to S105, and when it is sufficient, the switch is turned off (S104). When no power is supplied, the process proceeds to S105. In S105, whether or not there power is supplied from other cable is determined. When power is supplied, whether or not the supplied power is sufficient is determined (S106). When not sufficient, the process proceeds to S109, and when it is sufficient, an internal switch is turned off (S107) to detect a change in maximum power consumption (S108). In 109, whether or not power is supplied from AC power supply part is determined. When power is not supplied, the internal switch is turned on (S110) to detect a shift to a power saving mode (S111). <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
