| 摘要 |
All of LEDs 12a-12d are switched on in a case of illuminating a main display 21 mainly. Thus, each LED 12a-12d has a lighting region 22a-22d respectively, thereby illuminating the main display 21 entirely. Central LEDs 12b, 12c in LEDs 12a-12d are switched on in a case of illuminating a sub-display mainly. Thus, each LEDs 12b, 12c has a lighting region 22b, 22c respectively, thereby illuminating the sub-display 21b. |
