| 摘要 |
<p>PURPOSE:To measure contact position coordinates of a pointing material without hardware reset by updating a non-contact impedance at the time when the non-contact state is discriminated continuously a set number of times and a measured impedance is lower than the non-contact impedance by a set value or more. CONSTITUTION:When something other than the pointing material approaches or comes into contact with a touch panel 1 for a long time, (normally, several tens seconds), the contact state is discriminated continuously a set number M3 of times and the non-contact impedance is updated by a first non-contact impedance updating means 6. The non-contact impedance in this case is gener ally lower than that for contact of the pointing material (normally, a finger). Consequently, contact position coordinates of the pointing material on the touch panel 1 can be obtained. If the non-contact state is discriminated continuously a set number M1 of times by a second non-contact impedance updating means 7, the non-contact impedance is updated. Thus, contact of the pointing material is detected to measure the position coordinates without hardware reset.</p> |
