| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain relaxation effect by vision by changing display luminance in display elements gradually. <P>SOLUTION: A control part 62 generates a plurality of control signals whose duty ratios each of which indicates a ratio between switch-on time of LEDs 33B, 33G and switch-off time of them in prescribed time are different and also successively selects a control signal having a prescribed duty ratio from among the plurality of control signals and controls ON/OFF of respective output ports P11, P12, D11, D12 based on the selected control signal so that the duty ratios are changed by repeating an ascending order and a descending order for every prescribed time. As a result, when a driving element 34 drives LEDs 33B, 33G based the ON/OFF of respective output ports P11, P12, D11, D12, display luminance in the LEDs 33B, 33G change gradually with passage of time. <P>COPYRIGHT: (C)2004,JPO |
