| 摘要 |
A cellular phone has back light illumination for its display unit and a key unit, and is capable of receiving internet information, receiving karaoke songs, or receiving and sending electronic mails. In the case that the cellular phone is used for electronic mailing, it is checked whether the cellular phone is operated in a character/number input mode. If it is not in the input mode, only the display unit and a function key part of the key unit are illuminated. A ten key part of the key unit is illuminated only when it is to be manipulated to change display on the display unit. In the case of executing the internet function or the karaoke function, the illumination control for the display unit and the key unit is controlled in the similar manner. |
