System and Method For Detecting the Location, Size and Shape of Multiple Objects That Interact With a Touch Screen Display
First Claim
Patent Images
1. A method for detecting the location, shape and size of at least one object placed on a plane within the touch sensor boundaries of a touch screen (10), the touch screen (10) including on its periphery a plurality of light transmitters Li{i=1−
- N} and a plurality of sensors Sk{k=1−
M}, the method comprising the acts of;
(a) acquiring calibration data for each of the N light transmitters Li;
(b) acquiring non-calibration data for each of the N light transmitters Li;
(c) computing N minimum area estimates of said at least one object using the calibration data and the non-calibration data;
(d) combining the N minimum area estimates to derive a total minimum object area estimate of the at least one object;
(e) computing N maximum area estimates of said at least one object using the calibration data and the non-calibration data;
(f) combining the N maximum area estimates to derive a total maximum object area estimate of the at least one object; and
(g) combining the total minimum and maximum object area estimates to derive the boundary area of the at least one object.
1 Assignment
0 Petitions
Accused Products
Abstract
A system, method and apparatus is disclosed for detecting the location, size and shape of an object, or multiple objects, placed on a plane within the touch sensor boundaries of a touch screen (10).
-
Citations
29 Claims
-
1. A method for detecting the location, shape and size of at least one object placed on a plane within the touch sensor boundaries of a touch screen (10), the touch screen (10) including on its periphery a plurality of light transmitters Li{i=1−
- N} and a plurality of sensors Sk{k=1−
M}, the method comprising the acts of;(a) acquiring calibration data for each of the N light transmitters Li; (b) acquiring non-calibration data for each of the N light transmitters Li; (c) computing N minimum area estimates of said at least one object using the calibration data and the non-calibration data; (d) combining the N minimum area estimates to derive a total minimum object area estimate of the at least one object; (e) computing N maximum area estimates of said at least one object using the calibration data and the non-calibration data; (f) combining the N maximum area estimates to derive a total maximum object area estimate of the at least one object; and (g) combining the total minimum and maximum object area estimates to derive the boundary area of the at least one object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- N} and a plurality of sensors Sk{k=1−
-
20. An apparatus for detecting the location, shape and size of at least one object placed on a plane within the touch sensor boundaries of a touch screen (10), the touch screen (10) comprising a plurality of light transmitters Li {i=1−
- N} and sensors Sk {k=1−
M} arranged around a periphery of said touch screen (10). - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
- N} and sensors Sk {k=1−
-
29. An apparatus for detecting the location, shape and size of at least one object placed on a plane within the touch sensor boundaries of a touch screen (10), the touch screen (10) including on its periphery a plurality of light transmitters Li {i=1−
- N} and a plurality of sensors Sk {k=1−
M}, the system comprising;means for acquiring calibration data for each of the N light transmitters Li; means for acquiring non-calibration data for each of the N light transmitters Li; means for computing N minimum area estimates of said at least one object using the calibration data and the non-calibration data; means for combining the N minimum area estimates to derive a total minimum object area of the at least one object; means for computing N maximum area estimates of said at least one object using the calibration data and the non-calibration data; means for combining the N maximum area estimates to derive a total maximum object area of the at least one object; and means for combining the total minimum and maximum object areas to derive an actual object area of the at least one object.
- N} and a plurality of sensors Sk {k=1−
Specification