TOUCH POINT DETECTING DEVICE AND THE TOUCH POINT DETECTING METHOD THEREOF
First Claim
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1. A touch point detecting device, comprising:
- a plurality of electrodes;
a scanning unit connected to said electrodes and scanning said electrodes with at least two variable excitation signal frequencies.
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Abstract
A touch point detecting device is provided. The touch point detecting device comprises a plurality of electrodes and a scanning unit connected to said electrodes and scanning said electrodes with at least two variable excitation signal frequencies. A touch point detecting method is also provided. By means of the touch point detecting device, the electrode border as well as the integrated circuit package of the processor is reduced without reducing the detection accuracy of touch points.
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Citations
17 Claims
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1. A touch point detecting device, comprising:
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a plurality of electrodes; a scanning unit connected to said electrodes and scanning said electrodes with at least two variable excitation signal frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch point detecting method, comprising the steps of:
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a) scanning electrodes with at least two variable excitation signal frequencies; b) detecting output values generated on said electrodes where at least one touch points occur; and c) calculating output value differences of said output values; and d) outputting positions of said touch points on said electrodes. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification