| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a display system of a communication device which improves the readability of sentences and makes it easy to input data. <P>SOLUTION: A portable radio terminal device includes: a display unit section 3 having a display part 2 for displaying information; a first operation section having one or more operation buttons 4A; and a second operation section having one or more operation buttons 4B arranged at a different position from the first operation section; wherein the display unit section is capable of rotating from a position, where the display part becomes longitudinally long with respect to a main body of the portable radio terminal device, to the other position where the display part becomes laterally long, and the second operation section becomes operable when the display unit section is placed at the laterally-long position. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
