TOUCH SENSOR AND DRIVING METHOD THEREOF

摘要

A touch sensor includes a controller to detect a touch on a screen. The controller includes a voltage analyzer and a calculator. The voltage analyzer measures an output voltage of a sensing electrode of a touch sensor. The calculator calculates a capacitance between the sensing electrode and a driving electrode. The calculator calculates the capacitance based on a voltage matrix and the output voltage for one or more time periods. The voltage matrix is based on a code matrix of a plurality of code matrices.

主权项

1. A touch sensor, comprising:
a plurality of driving electrodes; a plurality of sensing electrodes crossing the driving electrodes; a touch driver to supply a touch driving signal to the driving electrodes; a voltage measuring unit to measure output voltages of the sensing electrodes for each time period; a memory to store a plurality of code matrices; and a capacitance calculating unit to select one of the code matrices in the memory, and to calculate capacitance between one of the sensing electrodes and one of the driving electrodes based on the selected one of the code matrices and a voltage matrix, wherein the voltage matrix includes the output voltages of one of the sensing electrodes for the time period.