| 摘要 |
<p>PROBLEM TO BE SOLVED: To save wasteful power for display by preventing the disappearing of input data by misoperation. SOLUTION: An input detection part 12 detects the presence/absence of data input from an input part 11 in the middle of operating a device. When a clock part 13 detects the absence of data input in a prescribed time by means of the detection signal, a power source control part 14 supplies a dropped voltage set to be lower than a rated voltage for a display part 15. The dropped voltage is a voltage at a lowest level for identifying data on the display part 15. Thus in the state of being supplied with this dropped voltage, a user never regards the device as being not operated because data on the screen looks dark.</p> |
