Touch screen calibration sensor

摘要

A touchscreen may be calibrated using a second sensor that may be placed around the periphery of the touchscreen in a known position with respect to the touchscreen. The second sensor may be incorporated into a bezel and may have one or more sensor elements. The second sensor may be used to sense the position of a user's finger or stylus when the user touches an object on the touchscreen display, and the second sensor output may be used to update a calibration factor based on the position of the displayed object. The second sensor may be used to periodically recalibrate the touchscreen any time an object is selected in proximity to the second sensor.

主权项

1. A device comprising:
a touchscreen comprising a display and a touch input mechanism; a second sensor mechanism located at a first location, said first location in a known physical location with respect to said touchscreen, said second sensor mechanism mounted into a bezel around said touchscreen, and said second sensor mechanism configured to detect a touch event at a second location on the touchscreen at said first location, wherein said first location and said second location are different locations with respect to the touchscreen; and a processor configured to:
cause said display to present an object in said second location on the touchscreen, the object presented at a known physical location on the touchscreen with respect to the second sensor mechanism;receive a touch input from said touch input mechanism providing a positional location of the touch input on said touchscreen, the positional location comprising raw coordinates associated with the touch input;receive an indication of detection of the touch event at the second location from said second sensor mechanism, the indication corresponding to an actual location on the touchscreen; anddetermine a calibration factor of the positional location of said touch input based on the indication of detection of said touch event at said object in the second location from said second sensor mechanism at the first location by comparing the raw coordinates associated with the positional location with the actual location determined by the second sensor mechanism.