PALM GESTURE DETECTION

1 . A device comprising:

an electronic display configured to display an object;

a digitizer sensor configured to sense touch input from a palm, wherein the digitizer sensor is integrated with the display, and

a circuit configured to:

detect coordinates of the touch input;

detect a contour of the touch input; and

select the object based on the object being at least partially surrounded by the contour.

2 . The device of claim 1 , wherein the circuit is configured to define the contour with a plurality of coefficients of a pre-defined function.

3 . The device of claim 2 , wherein the function is a segmented differential function.

4 . The device of claim 2 , wherein the function is a parametric function.

5 . The device of claim 2 , wherein the coefficients are FFT coefficients of the pre-defined function.

6 . The device of claim 2 , comprising a host computer; and an application running on the host computer, wherein the plurality of coefficients is reported to the application.

7 . The device of claim 1 , wherein the circuit is configured to track changes in the coordinates of the touch input and in the contour as a palm sweeps across the display and to adjust position of the object according to the changes.

8 . The device of claim 1 , wherein the circuit is configured to display a menu based on the object being selected, wherein the menu is displayed at a defined location with respect to a concave portion of the contour.

9 . The device of claim 1 , wherein the digitizer sensor is a grid based capacitive sensor.

10 . The device of claim 9 , wherein the digitizer sensor includes a plurality of row conductive lines crossing and a plurality of column conductive lines defining junctions at the crossings, wherein the touch input is detected on a plurality of the junctions.

11 . A device comprising:

an electronic display configured to display an object;

a digitizer sensor configured to sense touch input from a palm, wherein the digitizer sensor is integrated with the display, and

a circuit configured to:

detect coordinates of the touch input;

detect a contour of the touch input;

detect back and forth motion of the contour; and

erase the object or a portion thereof from the display based overlap between area enclosed by the contour and the object or the portion.

12 . The device of claim 11 , wherein the circuit is configured to define the contour with a plurality of coefficients of a pre-defined function.

13 . A method comprising:

displaying an object on a display;

sensing touch input from a palm with a digitizer sensor, wherein the digitizer sensor is integrated with the display;

detecting coordinates of the touch input;

detecting a contour of the touch input; and

selecting the object based on the object being at least partially surrounded by the contour.

14 . The method of claim 13 , comprising defining the contour with a plurality of coefficients of a pre-defined function.

15 . The method of claim 14 , wherein the function is a segmented differential function.

16 . The method of claim 14 , wherein the function is a parametric function.

17 . The method of claim 14 , wherein the coefficients are FFT coefficients of the pre-defined function.

18 . The method of claim 14 , comprising reporting the plurality of coefficients to a host computer associated with the display.

19 . The method of claim 13 , comprising tracking changes in the coordinates of the touch input and in the contour as a palm sweeps across the display and adjusting position of the object according to the changes.

20 . The method of claim 13 , comprising displaying a menu based on the object being selected, wherein the menu is displayed at a defined location with respect to a concave portion of the contour.