| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cellular phone with a lighting function in which power consumption for lighting is reduced. <P>SOLUTION: When a microcomputer 30 is in the course of electronic mailing, and determines in interrupt processing for each set time that a character/number input mode is not set, a transistor 20 is turned off to turn off light-emitting diodes 7c-7f. Accordingly, since lighting for ten keys (character/number input keys) 3d-3n, 3p necessary for operations is suspended, the power consumption for lighting is reduced. Moreover, when music is output, the backlight of a display part is lit. While, as for lighting for keys, lighting is suspended in a predetermined time even while music is output. <P>COPYRIGHT: (C)2008,JPO&INPIT |
