| 摘要 |
<p>PURPOSE:To input precise coordinates of an input point where a finger touches, to a computer, etc., by disposing one or a plurality of stripe-like auxiliary electrodes in parallel with a main electrode in a sheet of a face resistance part between the electrodes and impressing a required voltage. CONSTITUTION:In terms of a coordinate input sheet 8, the auxiliary electrode 9 is disposed in a stripe and in parallel with the electrodes 2 and 3 on the face resistance 4 in the middle of a space between the electrodes 2 and 3. The electrode 9 is connected to an auxiliary resistance 10, which is connected to the electrodes 2 and 3. If a voltage is impressed on the electrodes 2 and 3, it is impressed on the electrode 9 through the resistance 10. In that case, other measuring instruments measure a potential at the position corresponding to the electrode 9. If there is the difference between the potential at the position and a designed one, laser trimming is subjected to the resistance 10, and its value is changed, whereby the voltage impressed on the electrode 9 is corrected to obtain the designed potential. Thus the precise coordinates at the input point that a finger touches can be inputted to a computer, etc.</p> |
