INTEGRATED TOUCH AND FORCE DETECTION

摘要

This disclosure provides systems, methods and apparatus for determining a force index associated with a touch event. One aspect of the subject matter described in this disclosure can be implemented in a touch sensor system. The touch sensor system can include a touchscreen including a plurality of electrodes, and a sense circuit operable to sense electrical signals from the plurality of electrodes. The touch sensor system also can include an image processing module operable to generate an image frame based on the electrical signals sensed by the sense circuit. The touch sensor system also can include a feature extraction module operable to analyze the image frame and to identify touch event candidates based on the analysis. The touch sensor system also can include a touch event detection module operable to determine, for each identified touch event candidate, whether the touch event candidate is associated with a touch event. The touch sensor system further includes a force detection module operable to determine, for each touch event candidate associated with a touch event, a first component of the image frame associated with an object effect. The force detection module is further operable to determine, for each touch event candidate associated with a touch event, a second component of the image frame associated with a force effect, and to determine a force index value associated with the force effect.

主权项

1. A touch sensor system comprising:
a touchscreen including a plurality of electrodes; a sense circuit operable to sense electrical signals from the plurality of electrodes; an image processing module operable to generate an image frame based on the electrical signals sensed by the sense circuit; a feature extraction module operable to analyze the image frame and to identify touch event candidates based on the analysis; a touch event detection module operable to determine, for each identified touch event candidate, whether the touch event candidate is associated with a touch event; and a force detection module operable to:
determine, for each touch event candidate associated with a touch event, a first component of the image frame associated with an object effect,determine, for each touch event candidate associated with a touch event, a second component of the image frame associated with a force effect, anddetermine a force index value associated with the force effect.