| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a projection input device that can project a keyboard of appropriate size even under different installation conditions, such as projection distance, and an information terminal and charger having the projection input device. <P>SOLUTION: A hand feature point size (such as a finger length or interval) is detected and corresponding control is performed to maintain a constant relative ratio of the size of a projected keyboard and correct the direction of projection such that the projected keyboard is sized appropriately and directed appropriately. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
