Patent ID: 8692563

Claim:
An apparatus comprising: a capacitive sensor comprising a first electrode and a second electrode, wherein the first electrode is configured to have a first self-capacitance and the second electrode is configured to have a second self-capacitance, and wherein the first electrode and the second electrode are configured to have mutual capacitance between them; a sensing device including circuitry configured to sense self-capacitance and circuitry configured to sense mutual-capacitance, each configured to detect capacitance values corresponding to whether an object is proximate to a touch screen, wherein the sensing device is configured to measure a first capacitance value from the capacitive sensor using the self-capacitance circuitry during self-capacitance sensing operations and to measure a second capacitance value from the capacitive sensor using the mutual-capacitance circuitry during mutual-capacitance sensing operations; wherein the first capacitance value measured during the self-capacitance sensing operations corresponds to the first self-capacitance of the first electrode, and wherein the second capacitance value measured during the mutual-capacitance sensing operations corresponds to the mutual capacitance between the first electrode and the second electrode; and wherein, during the self-capacitance sensing operations, the sensing device is configured to set voltages on the first electrode and the second electrode to a same voltage level.