| 摘要 |
PROBLEM TO BE SOLVED: To identify an information code group of each information holding medium, when a plurality of information holding media with the information code groups are placed on an input surface.SOLUTION: As shown in FIG. 8(A), in a static state where information holding media 20A, 20B are placed, a boundary between coordinate areas of the media cannot be clearly determined, and a code group C1 corresponding to the information holding medium 20A cannot be distinguished from a code group C2 corresponding to the information holding medium 20A. As shown in FIG. 8(B), when the code group C1 corresponding to the information holding medium 20A moves in a certain direction by a certain amount and the code group C2 corresponding to the information holding medium 20 B moves in a different direction or by a different amount from the code group corresponding to the information holding medium 20A, the code groups C1 and C2 can be distinguished from each other, on the basis of the amount and direction.SELECTED DRAWING: Figure 8 |
