| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a mobile terminal device which can charge a secondary battery in a short time more efficiently by a solar battery. <P>SOLUTION: A mobile terminal device having a function of charging a secondary battery by a power generated by a solar battery has a calculation means calculating an incident angle of a sunlight and an azimuth of the sun at the time of charging, an angle detection means detecting an angle of a light incident plane of the solar battery, an azimuth detection means detecting an azimuth to which the light incident plane of the solar battery faces, and an adjustment means performing an adjustment by giving a voice guide to a user so that a sum of the angel of the light incident plane of the solar battery detected by the angle detection means and the incident angle of the sunlight calculated by the calculation means may become 90 degrees and the azimuth to which the light incident plane of the solar battery detected by the azimuth detection means faces may be coincident with the azimuth of the sun calculated by the calculation means. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
