Methods and apparatus for click detection on a force pad using dynamic thresholds

A method for measuring force on a force enabled input device having a touch surface, the method comprising:

• detecting force information associated with an input object contacting the touch surface;
• determining a dynamic push force value (DP) when the force information increases substantially monotonically above a low baseline value by at least a dynamic push threshold value εP;
• determining a dynamic release force value (DR) when the force information thereafter decreases substantially monotonically from a maximum baseline value by at least a dynamic release threshold value εR;
• and
• initiating a user interface action upon determining the release force value DR.

An input device comprising:

• a force enabled touch pad having a touch surface;
• and
• a processing system communicatively coupled to the touch pad, the processing system configured to:
• detect force information associated with an input object contacting the touch surface;
• determine a dynamic push force value (DP) when the force information increases substantially monotonically above a low baseline value by a dynamic push threshold value εP;
• and
• determine a dynamic release force value (DR) value when the force information thereafter decreases substantially monotonically from a maximum baseline value by a dynamic release threshold value εR.