| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a position detecting device for a touch panel which enhances precision in detecting a contact point position. <P>SOLUTION: The position detecting device is the device for the touch panel including a first conductive film 2b, having a uniform resistance distribution; and a second conductive film 2a which is slightly separated from the first conductive film 2b, arranged so as to superimpose on the first film 2b, and brought into local contact with the first film 2b by pressure. The device especially comprises: first and second electrodes 9a, 9b mutually facing and connected to the outer edge of the first conductive film 2b; an electric current supply part 12 for supplying a current to the second conductive film 2a; electric current detecting circuits 11a, 11b for measuring a first current which flows in the first conductive film 2b from the contact point of the first and second conductive films 2b, 2a toward the first electrode 9a and a second current which flows from the contact point of the first and second conductive films 2b, 2a toward the second electrode 9b; and a processing circuit 8 for performing a processing to specify the position of the contact point, based on the measurement values of the first and second electric currents. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
