Detecting touchdowns and liftoffs of touch objects
First Claim
Patent Images
1. An apparatus comprising:
- a sense array; and
a processing device, coupled to the sense array, the processing device to;
detect a presence of a touch object proximate to the sense array;
when the presence of the touch object comprises a touchdown of the touch object or a liftoff of the touch object, refrain from reporting a new position of the touch object when a change in the position of the touch object is less than a first movement threshold; and
when the presence of the touch object is not the touchdown of the touch object or the liftoff of the touch object, report the position of the touch object when the change in the position of the touch object is greater than a second movement threshold.
6 Assignments
0 Petitions
Accused Products
Abstract
A system comprises a processing device and a capacitive sense array that includes a plurality of electrodes is disclosed. When a touchdown of a touch object is detected, the change in a touch area (e.g., an area where the touch object is in contact with the touch panel) caused by the touchdown may not be reported as a movement of the touch object. When a liftoff of the touch object is detected, the change in the touch area caused by the liftoff may not be reported as a movement of the touch object.
14 Citations
20 Claims
-
1. An apparatus comprising:
-
a sense array; and a processing device, coupled to the sense array, the processing device to; detect a presence of a touch object proximate to the sense array; when the presence of the touch object comprises a touchdown of the touch object or a liftoff of the touch object, refrain from reporting a new position of the touch object when a change in the position of the touch object is less than a first movement threshold; and when the presence of the touch object is not the touchdown of the touch object or the liftoff of the touch object, report the position of the touch object when the change in the position of the touch object is greater than a second movement threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method comprising:
-
detecting a presence of a touch object proximate to a sense array; when the presence of the touch object comprises a touchdown of the touch object or a liftoff of the touch object, refraining from reporting a new position of the touch object when a change in the position of the touch object is less than a first movement threshold; and when the presence of the touch object is not the touchdown of the touch object or the liftoff of the touch object, reporting the position of the touch object when the change in the position of the touch object is greater than a second movement threshold. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification