Patent ID: 8994685
Filing Date: 2015-03-31
Classification: G06F

Abstract:
1. A touch panel comprising: a first substrate on which a plurality of first electrode lines are arranged in parallel; a second substrate which is spaced apart from the first substrate and on which a plurality of second electrode lines perpendicular to the first electrode lines are arranged in parallel; a dielectric layer interposed between the first substrate and the second substrate; a driving unit which applies a driving voltage for driving the dielectric layer to all or a portion of capacitance nodes formed at intersections between the plurality of first electrode lines and the plurality of second electrode lines; and a sensing unit which determines whether there is an input on the touch panel, based on a change in capacitance at the capacitance nodes, wherein the sensing unit comprises a charge pump to which an output signal from the intersections between the first electrode lines and the second electrode lines is input as a charge source according to the change in capacitance at the capacitance nodes in response to a sensing signal that is sequentially applied to the first electrode lines, the sensing signal having a sensing voltage different from a driving voltage, and the sensing unit determines whether there is the input on the touch panel, based on an output voltage of the charge pump.