METHOD FOR DETECTING TOUCH POINTS OF TOUCH PANEL
First Claim
1. A method for detecting a touch point of a touch panel,the touch panel comprising:
- a first electrode plate comprising a first conductive layer and a second conductive layer;
the first conductive layer comprising a plurality of first conductive channels aligned substantially along a first direction;
the second conductive layer comprising a plurality of second conductive channels aligned substantially along a second direction being crossed with the first direction, a first capacitance value being formed between the first conductive layer and the second conductive layer; and
a second electrode plate comprising a third conductive layer having a plurality of third conductive channels aligned substantially along a third direction being crossed with the second direction, a second capacitance value being formed between the third conductive layer and the second conductive layer, the second electrode plate being spaced from first electrode plate, and a distance between the first electrode plate and the second electrode plate being deformable;
the method comprising;
applying a first driving signal to one of the first conductive layer and the second conductive layer, and obtaining a capacitance change Δ
C1 of the first capacitance from the other of the first conductive layer and the second conductive layer that the first driving signal is not applied thereon;
determining a two-dimensional coordinate of the touch point according to the capacitance variety Δ
C1;
applying a second driving signal to one of the second conductive layer and the third conductive layer, and obtaining a capacitance change Δ
C2 of the second capacitance from one of the second conductive layer and the third conductive layer; and
comparing Δ
C2 with a threshold value C0;
when Δ
C2>
C0, outputting a three-dimensional coordinate of the touch point;
when Δ
C2 C0, outputting the two-dimensional coordinate of the touch point.
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Accused Products
Abstract
A method for detecting a touch point of a touch panel is disclosed. A first driving signal is applied to a first conductive layer or a second conductive layer to obtain a capacitance variety ΔC1 of a first capacitance value between the first conductive layer and the second conductive layer. A second driving signal is applied to a second conductive layer or a third conductive layer to obtain a capacitance variety ΔC2 of a second capacitance value between the second conductive layer and the third conductive layer. If ΔC2 is greater than a threshold value C0, outputting a three-dimensional coordinate of the touch point; if ΔC2 is less than or equal to the threshold value C0, outputting a two-dimensional coordinate of the touch point.
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Citations
20 Claims
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1. A method for detecting a touch point of a touch panel,
the touch panel comprising: -
a first electrode plate comprising a first conductive layer and a second conductive layer;
the first conductive layer comprising a plurality of first conductive channels aligned substantially along a first direction;
the second conductive layer comprising a plurality of second conductive channels aligned substantially along a second direction being crossed with the first direction, a first capacitance value being formed between the first conductive layer and the second conductive layer; anda second electrode plate comprising a third conductive layer having a plurality of third conductive channels aligned substantially along a third direction being crossed with the second direction, a second capacitance value being formed between the third conductive layer and the second conductive layer, the second electrode plate being spaced from first electrode plate, and a distance between the first electrode plate and the second electrode plate being deformable; the method comprising; applying a first driving signal to one of the first conductive layer and the second conductive layer, and obtaining a capacitance change Δ
C1 of the first capacitance from the other of the first conductive layer and the second conductive layer that the first driving signal is not applied thereon;determining a two-dimensional coordinate of the touch point according to the capacitance variety Δ
C1;applying a second driving signal to one of the second conductive layer and the third conductive layer, and obtaining a capacitance change Δ
C2 of the second capacitance from one of the second conductive layer and the third conductive layer; andcomparing Δ
C2 with a threshold value C0;
when Δ
C2>
C0, outputting a three-dimensional coordinate of the touch point;
when Δ
C2 C0, outputting the two-dimensional coordinate of the touch point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification