CAPACITIVE TOUCH PANEL, DRIVING METHOD FOR PREVENTING LEAKAGE CURRENT
First Claim
1. A capacitive touch panel, comprising:
- a substrate;
a transparent conductive layer with anisotropic impedance located on the substrate, a lower impedance direction D and a higher impedance direction H are defined on the transparent conductive layer, the lower impedance direction D is perpendicular to the higher impedance direction H;
a plurality of driving sensing electrodes located on the two opposite sides of the transparent conductive layer, the plurality of driving sensing electrodes is located along a direction perpendicular to the lower impedance direction D;
at least one sensing unit connected to the plurality of driving sensing electrodes for scanning the plurality of driving sensing electrodes;
wherein the capacitive touch panel comprises at least one voltage compensation unit configured to provide an offset voltage, and the at least one voltage compensation unit comprises a first end and a second end, the first end of at least one voltage compensation unit is connected to at least one of the plurality of driving sensing electrodes, the second end of at least one voltage compensation unit is connected to a grounding voltage.
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Abstract
A capacitive touch panel includes a substrate; a transparent conductive layer with anisotropic impedance located on the substrate; a plurality of driving sensing electrodes located on the opposite two sides of the transparent conductive layer; at least one sensing unit connected to the plurality of driving sensing electrodes for scanning the plurality of driving sensing electrodes; at least one voltage compensation unit which provides a offset voltage, at least one voltage compensation unit has a first end and a second end, the first end of at least one voltage compensation unit is at least connected to one of the plurality of driving sensing electrodes, the second end of at least one voltage compensation unit is connected to a grounding voltage. The present application also relates to a driving method for preventing leakage current of the capacitive touch panel.
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Citations
18 Claims
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1. A capacitive touch panel, comprising:
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a substrate; a transparent conductive layer with anisotropic impedance located on the substrate, a lower impedance direction D and a higher impedance direction H are defined on the transparent conductive layer, the lower impedance direction D is perpendicular to the higher impedance direction H; a plurality of driving sensing electrodes located on the two opposite sides of the transparent conductive layer, the plurality of driving sensing electrodes is located along a direction perpendicular to the lower impedance direction D; at least one sensing unit connected to the plurality of driving sensing electrodes for scanning the plurality of driving sensing electrodes; wherein the capacitive touch panel comprises at least one voltage compensation unit configured to provide an offset voltage, and the at least one voltage compensation unit comprises a first end and a second end, the first end of at least one voltage compensation unit is connected to at least one of the plurality of driving sensing electrodes, the second end of at least one voltage compensation unit is connected to a grounding voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A driving method for driving a capacitive touch panel, comprising steps of:
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providing a capacitive touch panel, the capacitive touch panel comprises a transparent conductive layer with anisotropic impedance located on the substrate, a lower impedance direction D and a higher impedance direction H are defined on the transparent conductive layer, the lower impedance direction D is perpendicular to the higher impedance direction H;
a plurality of driving sensing electrodes located on the two opposite sides of the transparent conductive layer, the plurality of driving sensing electrodes is located along a direction perpendicular to the lower impedance direction D;
at least one sensing unit connected to the plurality of driving sensing electrodes for scanning the plurality of driving sensing electrodes, and the at least one sensing unit comprises a read-out circuit;
at least one voltage compensation unit is configured to provide an offset voltage and comprises a first end and a second end, the first end of at least one voltage compensation unit is connected to at least one of the plurality of driving sensing electrodes, the second end of at least one voltage compensation unit is connected to a grounding voltage;sensing an input touch on the transparent conductive layer, and forming a touch capacitance; sequentially scanning the plurality of driving sensing electrodes by the at least one sensing unit;
in process of scanning each of the plurality of driving sensing electrodes, providing an offset voltage by the rest of the plurality of driving sensing electrodes thought the at least one voltage compensation unit; anddetermining an input touch position by a charge parameter of the touch capacitance which is read out by the read-out circuit. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification