Two-dimensional capacitive touch panel with single sensor layer
AssigneeElan Microelectronics Corporation
InventorsChia-Hsing LIN, Wen-Jun HSU, Yi-Hsin TAO
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Abstract
A two-dimensional capacitive touch panel includes three electrodes made from a single sensor layer, with the first one of the electrodes between the other two of the electrodes to establish mutual capacitances between the first electrode and the other two, respectively. The mutual capacitance between the first and second electrodes increases along a direction, and the mutual capacitance between the first and third electrodes decreases along a direction. The first electrode is applied with an excitation signal for sensing variations in the mutual capacitances to calculate a position in the direction that is touched by an external conductor.
Claims7
A two-dimensional capacitive touch panel with single sensor layer, the touch panel comprising:
- a first electrode made from the sensor layer;
- a second electrode made from the sensor layer, positioned at a first side of the first electrode, for sensing a first mutual capacitance established between the first electrode and the second electrode;
- and
- a third electrode made from the sensor layer, positioned at a second side of the first electrode, for sensing a second mutual capacitance established between the first electrode and the third electrode;
- wherein the first and second mutual capacitances are used to calculate a position on which the touch panel is contacted by an external conductor.
Dependencies are inferred from the claim text.