Method to parameterize and recognize circular gestures on touch sensitive surfaces
AssigneeSTMicroelectronics Asia Pacific Pte Ltd
InventorHup-Peng Goh
Life of this patent
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Abstract
A method to parameterize and recognize circular gestures on touch sensitive surfaces includes dividing the touch sensitive surface into four quadrants, detecting a transition from a first quadrant into a second quadrant, time-stamping and tracking each detected quadrant transition, and computing the time between quadrant transitions so that the circular speed and direction of the circular gestures on the touch sensitive surface can be detected. The detected direction can be either a clockwise or a counter-clockwise direction.
Claims21
A method to parameterize and recognize circular gestures on touch sensitive surfaces comprising:
- dividing the touch sensitive surface into four quadrants;
- detecting a transition from a first quadrant into a second quadrant;
- time-stamping and tracking each detected quadrant transition;
- and
- computing the time between quadrant transitions so that the circular speed and direction of the circular gestures on the touch sensitive surface can be detected.
A method for circular gesture recognition associated with a touch-screen comprising:
- a timer is loaded with a chosen number of ticks to countdown to zero;
- the timer is reloaded whenever it reaches zero or when there is a change in direction of a quadrant transition;
- a transition counter increments on every quadrant transition;
- the counter is cleared on timer load or reload;
- and
- if the number of quadrant transitions in the same direction is equal to or above the criteria threshold when the timer reaches zero, a circular gesture is recognized.
A method for circular gesture recognition associated with a touch-screen comprising:
- a transition counter increments on every quadrant transition;
- the counter is cleared when a chosen fixed number of same direction quadrant transitions is reached or when there is a direction change before the chosen number of transitions is reached;
- a timestamp is accumulated for every quadrant transition;
- the timestamp accumulation is cleared when the transition counter is cleared;
- and
- if the accumulated time is less than the threshold time when the transition counter reaches the chosen number of quadrant transitions, a circular gesture is recognized.
Dependencies are inferred from the claim text.