| CPC G06F 3/0445 (2019.05) [G06F 3/0414 (2013.01); G06F 3/04182 (2019.05); G06F 2203/04105 (2013.01); G06F 2203/04107 (2013.01)] | 10 Claims |
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1. An improved pressure touch sensing method using a touch sensing device, the touch sensing device comprising: a sensor pad comprising a plurality of conductive pads stacked one above another to form different layers and a non-conductor interposed between the conductive pads; and a sensor IC connected to the plurality of conductive pads of the sensor pad and comprising a first touch sensor sensing proximity and touch, a second touch sensor sensing a pressure, and a touch shield portion converting the conductive pads and a shield pad into a shield region, the touch sensing method comprising:
a first sensing step in which capacitance between an innermost conductive pad and a conductive pad disposed adjacent to the innermost conductive pad among the plurality of conductive pads is sensed by the second touch sensor of the sensor IC; and
a second sensing step in which capacitance between an outermost conductive pad and a conductive pad disposed adjacent to the outermost conductive pad among the plurality of conductive pads is sensed by the first touch sensor of the sensor IC,
wherein the plurality of conductive pads are configured to have the same properties,
wherein capacitance change due to pressure is sensed in the first sensing step, capacitance change due to external touch and proximity is sensed in the second sensing step, and when the capacitance change is sensed in both the first sensing step and the second sensing step, it is determined that touch by a user hand occurs.
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