Coordinate positioning device and method thereof
First Claim
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 roughly a half of the period of the periodic noise;
determining if the 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, neglect this contact point and end the process of this method;
obtain 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 roughly a multiple of the period of the periodic noise;
determining if the 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, neglect this contact point and end the process of this method;
use the average value of the first sampling value and the second sampling value to obtain the coordinate of the contact point.
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Accused Products
Abstract
A coordinate positioning device and the method thereof for detecting the coordinate of a contact point even in an environment of periodic noises. Firstly, obtain a first and a second sampling values of the contact point at a first and a second time points, respectively. Next, determine if the absolute value of the difference between the first and the second sampling values is smaller than a first threshold value. If not, neglect this contact point; if yes, obtain a third sampling value of the contact point at a third time point. Lastly, determine if the 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, neglect this contact point; if yes, use the average value of the first and second sampling values to obtain the coordinate value of the contact point.
13 Citations
12 Claims
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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:
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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 roughly a half of the period of the periodic noise;
determining if the 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, neglect this contact point and end the process of this method;
obtain 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 roughly a multiple of the period of the periodic noise;
determining if the 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, neglect this contact point and end the process of this method;
use the average value of the first sampling value and the second sampling value to obtain the coordinate of the contact point. - View Dependent Claims (2)
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3. 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:
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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;
determining if the 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, neglect this contact point and end the process of this method;
obtain a third sampling value of the contact point at a third time point;
determining if the 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, neglect this contact point and end the process of this method;
use the average value of the first sampling value and the second sampling value to obtain the coordinate of the contact point. - View Dependent Claims (4, 5, 6)
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7. A coordinate positioning device for detecting a coordinate value of a contact point under an environment of periodic noise, comprising:
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a thin film X which has a first X-end and a second X-end a thin film Y which has a first Y-end and a second Y-end;
a first switch Y coupled to the first Y-end and a ground end;
a second switch Y coupled to the second Y-end and a power source;
a first switch X coupled to the first X-end and the ground end;
a second switch X coupled to the second X-end and the power source;
of which, if a sampling point is to be sampled by the positioning device, the sampling point is the first X-end, the second X-end, the first Y-end or the second Y-end;
first of all, a first sampling value of the sampling point is obtained at a first time point while a second sampling value of the sampling point is obtained at a second time point, wherein the interval between the first time point and the second time point is roughly a half of the period of the periodic noise;
secondly, determine if the 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, neglect the contact point;
obtain a third sampling value of the sampling point at a third time point, wherein the interval between the third time point and the first time point is roughly a multiple of the period of the periodic noise;
next, determining if the 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, neglect the contact point;
lastly, the positioning device uses the average value of the first sampling value and the second sampling value to obtain the coordinate value of the contact point. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification