| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the power consumption of an element for decreasing a voltage from an external power source supply source. SOLUTION: When is it discriminated that a key for requesting the lighting of an EL backlight is depressed in a step S202, a voltage from an AC adapter 1 is detected (a step S204), and whether or not a detected voltage Vin is not less than a preliminarily decided detection voltage level Vref is discriminated (a step S205), and when it is discriminated that the Vin is less than the Vref, an EL panel 13 is turned on (a step S206).</p> |
