Abstract: An apparatus and method for detecting the angle of passive rotary knob partially located on a touch screen are described. In embodiments the apparatus includes a touch screen having an array of sensors and a dial that includes a base and a knob attached to the base and rotatable relative to the base. The knob includes a plurality of conductive elements, each positioned a distance from a center point of the knob. A controller is also included, coupled to the touch screen, and configured to receive signals generated by one or more sensors of the array in response to the sensors detecting one or more of the conductive elements. The controller can determine a rotational angle of the knob based on the signals generated by the one or more of the sensors in the array while a portion of the knob does not overlap the array of sensors.

Abstract: A touch screen device is disclosed. The touch screen device includes a touch screen panel having a capacitive sense array, and a passive dial including first, second and third conductive parts. The first conductive part and the third conductive part are in proximity to a surface of the touch screen panel, and the second conductive part is conductively coupled to the third conductive part when the passive dial is pressed and is not conductively coupled to the third conductive part when the passive dial is not pressed. A position of the first conductive part above the capacitive sense array corresponds to a touch index in the capacitive sense array and a position the third conductive part above the capacitive sense array corresponds to a button press index in the capacitive sense array. The first, second and third conductive parts are movable in conjunction with a rotation of the passive dial.

Abstract: Systems, methods, and devices detect defects in touch panels. Methods include scanning, using a designated integration window, a plurality of electrodes of a sensing device to obtain a plurality of measurements and determining a plurality of variance values for the plurality of electrodes based on the plurality of measurements, the plurality of variance values identifying variances in the plurality of measurements between adjacent sense locations of the sensing device. Methods also include determining if a defect is present in the sensing device based, at least in part, on a comparison of the plurality of difference values with the plurality of threshold values.

Abstract: An apparatus and method for detecting the angle of passive rotary knob partially located on a touch screen are described. In embodiments the apparatus includes a touch screen having an array of sensors and a dial that includes a base and a knob attached to the base and rotatable relative to the base. The knob includes a plurality of conductive elements, each positioned a distance from a center point of the knob. A controller is also included, coupled to the touch screen, and configured to receive signals generated by one or more sensors of the array in response to the sensors detecting one or more of the conductive elements. The controller can determine a rotational angle of the knob based on the signals generated by the one or more of the sensors in the array while a portion of the knob does not overlap the array of sensors.

Abstract: Systems, methods, and devices detect defects in touch panels. Methods include scanning, using a designated integration window, a plurality of electrodes of a sensing device to obtain a plurality of measurements and determining a plurality of variance values for the plurality of electrodes based on the plurality of measurements, the plurality of variance values identifying variances in the plurality of measurements between adjacent sense locations of the sensing device. Methods also include determining if a defect is present in the sensing device based, at least in part, on a comparison of the plurality of difference values with the plurality of threshold values.

Abstract: A method, apparatus, and system to detect a self-capacitance activation in view of a self-capacitance measurement of a first electrode. The method, apparatus, and system further to detect a mutual capacitance activation in view of a mutual capacitance measurement of a pair of electrodes, and to determine the presence of water proximate to the capacitive button when the self-capacitance activation is false and the mutual capacitance activation is true. The capacitive button is disposed on a substrate.