Dynamic touch sensor scanning for false border touch input detection
First Claim
Patent Images
1. A method, comprising:
- performing, at a device having a touch screen display, a mutual capacitance scan of rows and columns of an array of capacitive touch sensors associated with the touch screen display;
detecting, by analysis of results from the performance of the mutual capacitance scan, presence of touch input adjacent a border of the touch screen display during receipt of additional touch input by a user to control the device;
in response to detecting the presence of the touch input adjacent the border of the touch screen display, performing a self capacitance scan with a subset of the rows and with a subset of the columns that correspond to an area of the touch screen display adjacent the border;
analyzing results of the self capacitance scan to identify that the touch input adjacent the border of the touch screen display is an accidental or false touch input on the touch screen display corresponding to the user grasping the device; and
ignoring the detected touch input made with the mutual capacitance scan adjacent the border of the touch screen display.
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Abstract
A device, having a touch screen display, performs a mutual capacitance scan of rows and columns of an array of capacitive touch sensors associated with the touch screen display. The device selects a subset of the rows, and a subset of the columns, of the array of capacitive touch sensors, and performs a self capacitance scan of the selected subset of the rows, and the selected subset of the columns, of the array of capacitive touch sensors based on results of the mutual capacitance scan. The device identifies an accidental or false touch input on the touch screen display based on results of the self capacitance scan.
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Citations
15 Claims
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1. A method, comprising:
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performing, at a device having a touch screen display, a mutual capacitance scan of rows and columns of an array of capacitive touch sensors associated with the touch screen display; detecting, by analysis of results from the performance of the mutual capacitance scan, presence of touch input adjacent a border of the touch screen display during receipt of additional touch input by a user to control the device; in response to detecting the presence of the touch input adjacent the border of the touch screen display, performing a self capacitance scan with a subset of the rows and with a subset of the columns that correspond to an area of the touch screen display adjacent the border; analyzing results of the self capacitance scan to identify that the touch input adjacent the border of the touch screen display is an accidental or false touch input on the touch screen display corresponding to the user grasping the device; and ignoring the detected touch input made with the mutual capacitance scan adjacent the border of the touch screen display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device, comprising:
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a touch screen display comprising; a touch surface surrounded by a border; a first layer of capacitive touch sensors including multiple rows of sensor electrodes disposed under the touch surface, and a second layer of capacitive touch sensors including multiple columns of sensor electrodes disposed under the touch surface; a first scanning unit configured to perform a mutual capacitance scan of the multiple rows and columns of the layers of capacitive touch sensors and detect, by analysis of results from the performance of the mutual capacitance scan, presence of touch input adjacent the border of the touch screen display during receipt of additional touch input by a user to control the device; a second scanning unit configured to perform, in response to detecting the presence of the touch input adjacent the border of the touch screen display, a self capacitance scan with a subset of the rows and with a subset of the columns that correspond to an area of the touch screen display adjacent the border; an input detection unit configured to analyze results of the self capacitance scan to identify that the touch input adjacent the border of the touch screen display is an accidental touch input on the touch screen display corresponding to the user grasping the device and ignore the detected touch input made with the mutual capacitance scan adjacent the border of the touch screen display. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification