Input sensing circuit and touch panel including the same

摘要

An input sensing device for sensing an input on a touch panel, and touch panel are provided. The input sensing device has a capacitance node and includes a charge pump to which an output signal from a first electrode of the capacitance node is input as a charge source in response to a sensing signal applied through a second electrode of the capacitance node. The input sensing device determines whether there is an input on the touch panel, based on an output voltage of the charge pump.

主权项

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.