Position detection method in touch panel and touch panel
First Claim
1. A position detection method in a touch panel that includes a first resistance film having first and second electrodes provided one on each end in a first direction and a second resistance film having third and fourth electrodes provided one on each end in a second direction orthogonal to the first direction, the position detection method comprising:
- calculating a distance between two contact points in the first direction by measuring a potential of the first electrode in a state where a power supply voltage is applied to the first electrode and the second electrode is grounded;
calculating a distance between the two contact points in the second direction by measuring a potential of the third electrode in a state where a power supply voltage is applied to the third electrode and the fourth electrode is grounded; and
correcting the calculated distance between the two contact points in the first direction by multiplying the calculated distance between the two contact points in the first direction by a correction coefficient calculated from the calculated distance between the two contact points in the second direction,wherein the correction coefficient increases as the calculated distance between the two contact points in the second direction increases, and decreases as the calculated distance between the two contact points in the second direction decreases.
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Accused Products
Abstract
A position detection method that includes calculating a distance between 2 contact points in a first direction by measuring a potential of a first electrode in a state where a power supply voltage is applied to the first electrode and a second electrode is grounded, calculating a distance between 2 contact points in a second direction by measuring a potential of a third electrode in a state where a power supply voltage is applied to the third electrode and a fourth electrode is grounded, and correcting the distance between the 2 contact points in the first direction obtained by the potential of the first electrode in accordance with the distance between the 2 contact points in the second direction obtained by the potential of the third electrode.
9 Citations
14 Claims
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1. A position detection method in a touch panel that includes a first resistance film having first and second electrodes provided one on each end in a first direction and a second resistance film having third and fourth electrodes provided one on each end in a second direction orthogonal to the first direction, the position detection method comprising:
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calculating a distance between two contact points in the first direction by measuring a potential of the first electrode in a state where a power supply voltage is applied to the first electrode and the second electrode is grounded; calculating a distance between the two contact points in the second direction by measuring a potential of the third electrode in a state where a power supply voltage is applied to the third electrode and the fourth electrode is grounded; and correcting the calculated distance between the two contact points in the first direction by multiplying the calculated distance between the two contact points in the first direction by a correction coefficient calculated from the calculated distance between the two contact points in the second direction, wherein the correction coefficient increases as the calculated distance between the two contact points in the second direction increases, and decreases as the calculated distance between the two contact points in the second direction decreases. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A position detection method in a touch panel that includes a first resistance film having first and second electrodes provided one on each end in a first direction and a second resistance film having third and fourth electrodes provided one on each end in a second direction orthogonal to the first direction, the position detection method comprising:
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measuring a potential of the first electrode when the touch panel is contacted at two contact points by applying voltage to the first electrode without applying voltage to the third electrode; measuring a potential of the third electrode when the touch panel is contacted at the two contact points by applying voltage to the third electrode without applying voltage to the first electrode; and correcting a distance between the two contact points by correcting a distance between the two contact points in the first direction obtained by the measured potential of the first electrode by multiplying the obtained distance between the two contact points in the first direction by a first correction coefficient calculated from a distance between the two contact points in the second direction obtained by the measured potential of the third electrode, wherein the first correction coefficient increases as the calculated distance between the two contact points in the second direction increases, and decreases as the calculated distance between the two contact points in the second direction decreases. - View Dependent Claims (8, 9, 10)
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11. A touch panel comprising:
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a first resistance film having first and second electrodes provided one on each end in a first direction; a second resistance film having third and fourth electrodes provided one on each end in a second direction orthogonal to the first direction; a control part; and a storage part; wherein in a case where the touch panel is contacted at two contact points, the control part is configured to calculate a distance between the two contact points in the first direction by measuring a potential of the first electrode in a state where a power supply voltage is applied to the first electrode and the second electrode is grounded, calculate a distance between the two contact points in the second direction by measuring a potential of the third electrode in a state where a power supply voltage is applied to the third electrode and the fourth electrode is grounded, and correct the calculated distance between the two contact points in the first direction by multiplying the calculated distance between the two contact points in the first direction by a correction coefficient calculated from the calculated distance between the two contact points in the second direction, wherein the correction coefficient increases as the calculated distance between the two contact points in the second direction increases, and decreases as the calculated distance between the two contact points in the second direction decreases, and wherein the correction coefficient is stored in the storage part. - View Dependent Claims (12, 13, 14)
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Specification