Patent number 8564565 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "Touch-sensitive systems detect and respond to one or more points of contact on a surface. A touch-sensitive system may be incorporated within an electronic device in the form of a touch screen display that allows a user to both view and manipulate objects using one or more inputs that contact the screen."
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventor's summary information for this patent: "This specification describes technologies generally related to reduction or rejection of noise in touch sensors.
"In general, some aspects of the subject matter described in this specification can be implemented in methods that involve a sensor. Other implementations of this aspect include corresponding systems, apparatus, and computer programs configured to perform the actions of the methods. The computer programs being encoded on computer storage devices.
"In general, another aspect of the subject matter described in this specification can be implemented in methods that include actions related to providing a cleaned signal in a capacitive touch sensor. The capacitive touch sensor includes a first array of conductors and a second array of conductors. The conductors in the first array are arranged substantially in parallel with one another, and the conductors in the second array are arranged substantially in parallel with one another. The conductors in the first array are positioned substantially perpendicular to the conductors in the second array to form a matrix. A phase of periodic noise on an input of the capacitive touch sensor is determined, and a periodic excitation signal having a phase that is locked to the determined phase of the periodic noise is generated. The periodic excitation signal is applied to an excited conductor in the first array. While the excitation signal is applied, a response signal on a responding conductor in the second array is detected, and, based on the detected response signal, a value indicative of a measured capacitance between the excited conductor and the responding conductor is generated. A threshold value is accessed, and a determination is made whether the response signal corresponds to a touch based on a difference between the value and the threshold value; and a signal reflecting results of the determination of whether the response signal corresponds to a touch is produced.
"These and other implementations can each optionally include one or more of the following features. Determining whether the response signal corresponds to a touch can include determining whether the response signal corresponds to an input mechanism being in such physical proximity to the matrix that the input mechanism, by virtue of its proximity to the matrix, imparts a capacitance change between the excited conductor and the responding conductor. Determining whether the response signal corresponds to a touch can include determining whether the response signal corresponds to an input mechanism being in direct physical contact with the matrix such that a capacitance change occurs between the excited conductor and the responding conductor.
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