专利名称：Capacitive touch sensor发明人：Detelin Martchovsky申请号：US11046372申请日：20050127公开号：US07307626B2公开日：20071211
专利附图：
摘要：A method for determining the location of a touch made to a capacitivetouchscreen in which the touchscreen includes a plurality of electrodes distributedaround a touch sensitive area of the touchscreen, and a control circuit connected to theplurality of electrodes. The control circuit includes circuitry for measuring capacitance on
the sensor, and provides a control signal indicating coordinates of a touch position on thescreen, and includes multiple input/output connections, and multiple sub-circuits, whereone sub-circuit is associated with one electrode. The method includes using a firstswitching element of each sub-circuit, when closed, to connect an electrode to an energystorage element which is in turn connected to a reference or ground, and using a secondswitching element, when closed, to connect the energy storage element to a detector.The method includes charging an electrode to a set voltage level when the associatedfirst and second switching elements are closed and opened, respectively, and measuringenergy in the energy storage element with the detector when the first and secondswitching elements are opened and closed, respectively.
申请人：Detelin Martchovsky
地址：Fremont CA US
国籍：US
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