Touch detection method and device
First Claim
1. A touch detection method, comprising:
- obtaining coordinates of a point associated with touch points;
obtaining distances between the touch points in a direction of an axis to be measured;
determining indeterminate coordinates of the touch points based on the coordinates of the point associated with the touch points and the distances between the touch points in the direction of the axis to be measured; and
determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points, wherein the number of the touch points is two, indeterminate coordinates of the touch points comprise two sets of indeterminate coordinates, each set comprises indeterminate coordinates of the two touch points, and determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points comprises;
selecting one set of indeterminate coordinates as the actual coordinates of the two touch points based on voltages of two electrodes on a first resistive layer of a touch screen or voltages of two electrodes on a second resistive layer of the touch screen, where the voltages of the two electrodes on the first resistive layer are the voltages of the two electrodes on the first resistive layer when the second resistive layer is biased, and the voltages of the two electrodes on the second resistive layer are the voltages of the two electrodes on the second resistive layer when the first resistive layer is biased;
wherein selecting one set of indeterminate coordinates as the actual coordinates of the two touch points based on the voltages of two electrodes on the first resistive layer or the voltages of two electrodes on the second resistive layer comprises;
when the difference between the voltages of the two electrodes on the first resistive layer is greater than the difference between the voltages of the two electrodes on the second resistive layer, selecting one set of indeterminate coordinates as the actual coordinates of the two touch points according to the voltages of the two electrodes on the first resistive layer.
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Abstract
A touch detection method and device are provided. The method includes: obtaining coordinates of a point associated with touch points; obtaining distances between the touch points in a direction of an axis to be measured; determining indeterminate coordinates of the touch points based on the coordinates of the point associated with the touch points and the distances between the touch points in the direction of the axis to be measured; and determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points. The device includes: an associated point determining unit, adapted for obtaining coordinates of a point associated with touch points; a distance determining unit, adapted for obtaining distances between the touch points in a direction of an axis to be measured; an indeterminate coordinate determining unit, adapted for determining indeterminate coordinates of the touch points based on the coordinates of the point associated with the touch points and the distances between the touch points in the direction of the axis to be measured; and an actual coordinate determining unit, adapted for determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points.
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Citations
22 Claims
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1. A touch detection method, comprising:
- obtaining coordinates of a point associated with touch points;
obtaining distances between the touch points in a direction of an axis to be measured;
determining indeterminate coordinates of the touch points based on the coordinates of the point associated with the touch points and the distances between the touch points in the direction of the axis to be measured; and
determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points, wherein the number of the touch points is two, indeterminate coordinates of the touch points comprise two sets of indeterminate coordinates, each set comprises indeterminate coordinates of the two touch points, and determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points comprises;
selecting one set of indeterminate coordinates as the actual coordinates of the two touch points based on voltages of two electrodes on a first resistive layer of a touch screen or voltages of two electrodes on a second resistive layer of the touch screen, where the voltages of the two electrodes on the first resistive layer are the voltages of the two electrodes on the first resistive layer when the second resistive layer is biased, and the voltages of the two electrodes on the second resistive layer are the voltages of the two electrodes on the second resistive layer when the first resistive layer is biased;wherein selecting one set of indeterminate coordinates as the actual coordinates of the two touch points based on the voltages of two electrodes on the first resistive layer or the voltages of two electrodes on the second resistive layer comprises; when the difference between the voltages of the two electrodes on the first resistive layer is greater than the difference between the voltages of the two electrodes on the second resistive layer, selecting one set of indeterminate coordinates as the actual coordinates of the two touch points according to the voltages of the two electrodes on the first resistive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- obtaining coordinates of a point associated with touch points;
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12. A touch detection device, comprising:
- an associated point determining unit, adapted for obtaining coordinates of a point associated with touch points;
a distance determining unit, adapted for obtaining distances between the touch points in a direction of an axis to be measured;
an indeterminate coordinate determining unit, adapted for determining indeterminate coordinates of the touch points based on the coordinates of the point associated with the touch points and distances between the touch points in the direction of the axis to be measured; and
an actual coordinate determining unit, adapted for determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points, wherein the number of the touch points is two, indeterminate coordinates of the touch points comprise two sets of indeterminate coordinates, each set comprises indeterminate coordinates of the two touch points, and determining actual coordinates of the touch points according to the indeterminate coordinates of the touch points comprises;
selecting one set of indeterminate coordinates as the actual coordinates of the two touch points based on voltages of two electrodes on a first resistive layer of a touch screen or voltages of two electrodes on a second resistive layer of the touch screen, where the voltages of the two electrodes on the first resistive layer are the voltages of the two electrodes on the first resistive layer when the second resistive layer is biased, and the voltages of the two electrodes on the second resistive layer are the voltages of the two electrodes on the second resistive layer when the first resistive layer is biased;wherein the actual coordinate determining unit comprises a first actual coordinate determining unit, adapted for selecting one set of indeterminate coordinates as the actual coordinates of the two touch points according to the voltages of the two electrodes on the first resistive layer, when the difference between the voltages of the two electrodes on the first resistive layer is greater than the difference between the voltages of the two electrodes on the second resistive layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- an associated point determining unit, adapted for obtaining coordinates of a point associated with touch points;
Specification