| 摘要 |
<P>PROBLEM TO BE SOLVED: To notify that a power source has not been turned off but that power saving mode is provided, while suppressing power consumption to a minimum, and to simultaneously notify the user of useful information, such as the current time, for example. <P>SOLUTION: When the user does not operate at all a portable phone 100 for a fixed time, a control unit 101 turns off indication on a display unit 102 for suppressing the current consumption and stops entire illuminations of a display illumination unit 103 and a key individual illumination unit 107. In order to notify the user of the power saving mode, after the stop, the control unit 101 turns on only the key individual illumination unit 107 for numeral keys corresponding to information display at fixed time intervals to save power, rather than using the display unit 102. For instance, in the case of 2:45 PM, for example, numeric keys are sequentially turned on with turning-off operation for turn-off time between numerals, in the order of "1", "4", "4", "5" as 24-hours round-the-clock information. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
