Invention Application
US20150029141A1 TOUCH SENSING APPARATUS AND METHOD CAPABLE OF SUPPORTING HOVER SENSING 有权
触摸感应装置和方法可支持手感传感

TOUCH SENSING APPARATUS AND METHOD CAPABLE OF SUPPORTING HOVER SENSING
Abstract:
Disclosed herein is a touch sensing apparatus capable of supporting hover sensing, including: a plurality of capacitance-voltage converters (C-V converters) outputting different voltage values depending on a change in capacitance of each of the sensing electrodes; a plurality of integrators integrating output voltages of each of the C-V converters; a first multiplexer multiplexing outputs of the plurality of integrators; a second multiplexer multiplexing the outputs of the plurality of integrators; a first differential amplification unit for touch sensing receiving an output of the first multiplexer and an output of the second multiplexer; a second differential amplification unit for hover sensing receiving the output of the first multiplexer and the output of the second multiplexer; and a control unit sensing a touch event or a hover event, thereby removing a common noise to accurately sense both the touch event and the hover event.
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