Patent ID: 7301525
Filing Date: 2007-11-27
Classification: G06F

Abstract:
1. A coordinate positioning method, which is applied in a thin film positioning device for detecting a coordinate value of a contact point under an environment of periodic noises, comprising the steps of: obtaining a first sampling value of the contact point at a first time point; obtaining a second sampling value of the contact point at a second time point, wherein the interval between the first time point and the second time point is substantially a half of the period of the periodic noise; determining if an absolute value of the difference between the first sampling value and the second sampling value is smaller than a first threshold value or not: if not, neglecting this contact point and ending the process of this method; obtaining a third sampling value of the contact point at a third time point, wherein the interval between the third time point and the first time point is substantially a multiple of the period of the periodic noise; determining if an absolute value of the difference between the first sampling value and the third sampling value is smaller than a second threshold value or not: if not, neglecting this contact point and ending the process of this method; and using the average value of the first sampling value and the second sampling value to obtain the coordinate of the contact point.