Abstract: A frequency division modulated touch detector having row and column conductors arranged such that the path of the row conductors cross the paths of the column conductors, and signal emitters associated with each row, the emitters being adapted to transmit a signal having a specific frequency and initial phase on each row conductor, and a receiver associated with each column to receive signals present on the column conductor. A signal processor is adapted to determine an in-phase and a quadrature component for each of the transmitted signal found in the received signals, and to project a vector representing the transmitted frequencies at their initial phase onto the respective in-phase and quadrature component to determine a measurement for each transmitted signal on each column, and create a heat map reflecting those measurements, the heat map thus containing data reflective of touch.

Abstract: A frequency division modulated touch detector having row and column conductors arranged such that the path of the row conductors cross the paths of the column conductors, and signal emitters associated with each row, the emitters being adapted to transmit a signal having a specific frequency and initial phase on each row conductor, and a receiver associated with each column to receive signals present on the column conductor. A signal processor is adapted to determine an in-phase and a quadrature component for each of the transmitted signal found in the received signals, and to project a vector representing the transmitted frequencies at their initial phase onto the respective in-phase and quadrature component to determine a measurement for each transmitted signal on each column, and create a heat map reflecting those measurements, the heat map thus containing data reflective of touch.

Abstract: A frequency division modulated touch detector having row and column conductors arranged such that the path of the row conductors cross the paths of the column conductors, and signal emitters associated with each row, the emitters being adapted to transmit a signal having a specific frequency and initial phase on each row conductor, and a receiver associated with each column to receive signals present on the column conductor. A signal processor is adapted to determine an in-phase and a quadrature component for each of the transmitted signal found in the received signals, and to project a vector representing the transmitted frequencies at their initial phase onto the respective in-phase and quadrature component to determine a measurement for each transmitted signal on each column, and create a heat map reflecting those measurements, the heat map thus containing data reflective of touch.

Abstract: A system and method for performing frame-phase synchronization on received frames of signal on a touch detector. An apparatus and method for synchronizing frames with the phase of one or more simultaneously transmitted signals on a touch detector. One or more row conductors and one or more column conductors are arranged such that the path of the row conductor(s) cross the path of the column conductor(s). A signal emitter simultaneously initiates transmission of orthogonal signals on each of the rows at each of a plurality of intervals starting at a first time, the orthogonal signals having a known initial phase. A receiver starts receiving frames on the column at each of the intervals, starting at a later time. A signal processor determines a measure of the extent to which each of the orthogonal signals are present within the received frame—and thus, the extent to which they were transmitted across the touch detector.

Abstract: A frequency division modulated touch detector having row and column conductors arranged such that the path of the row conductors cross the paths of the column conductors, and signal emitters associated with each row, the emitters being adapted to transmit a signal having a specific frequency and initial phase on each row conductor, and a receiver associated with each column to receive signals present on the column conductor. A signal processor is adapted to determine an in-phase and a quadrature component for each of the transmitted signal found in the received signals, and to project a vector representing the transmitted frequencies at their initial phase onto the respective in-phase and quadrature component to determine a measurement for each transmitted signal on each column, and create a heat map reflecting those measurements, the heat map thus containing data reflective of touch.

Abstract: A touch sensitive device, comprising touch interface comprising rows and columns, a signal generator for generating a plurality of unique orthogonal signals on at least a plurality of the rows, respectively, capacitive sensors on at least a plurality of the columns for sensing changes in the amount of capacitive coupling between the rows and the columns on the touch interface, and a touch processor for identifying a pressure of touch on the touch interface by processing the amount of pressure applied to the touch interface based on the capacitive coupling. Methods for inferring contact pressure, calculating an inferred touch pressure, and calculating a single gradient value are also presented.