Pointer for interactive display system
There is disclosed a pointing device for use with an interactive surface, the pointing device comprising a coil for producing an electromagnetic field which couples into the interactive surface, the pointing device being arranged, in use, to be attached to a finger.
1 . A pointing device for use with an interactive surface, the pointing device comprising a coil for producing an electromagnetic field which couples into the interactive surface, the pointing device being arranged, in use, to be attached to a finger.
2 . The pointing device according to claim 1 including a receptacle arranged, in use, to be attached to a finger.
3 . The pointing device according to claim 2 wherein the receptacle is a finger-receiving receptacle, and the coil is attached to said receptacle.
4 . The pointer according to claim 2 wherein the receptacle is a thimble shaped element.
5 . The pointer according to claim 4 wherein the thimble shaped element has an open end for protrusion, in use, of a finger tip.
6 . The pointer according to claim 4 wherein the thimble shaped element has a closed end for contact, in use, with a whiteboard surface.
7 . The pointing device according to claim 1 wherein the coil is wound such that the coil provides a receptacle for a finger.
8 . The pointing device according to claim 1 wherein the device includes a contact point for contact with a whiteboard.
9 . The pointing device according to claim 8 wherein the contact point includes a finger cover.
10 . The pointing device according to claim 1 wherein in use a finger tip of a user is exposed, for contact with a whiteboard surface.
11 . The pointing device according to claim 2 wherein the pointer is provided with a coil around the receptacle.
12 . The pointing device according to claim 2 wherein the pointer has a coil attached to the receptacle.
13 . The pointing device according to claim 2 wherein the pointer has a coil adjacent to the receptacle.
14 . The pointing device according to claim 1 wherein the pointer has buttons disposed on a housing thereof.
15 . The pointing device according to claim 1 wherein the coil is a drive coil.
16 . The pointing device according to claim 1 wherein the coil forms an inductor of a tuned circuit.
17 . The pointing device according to claim 1 wherein an electromagnetic field produced in the interactive surface couples into the coil.
18 . The pointing device according to claim 17 wherein the electromagnetic field coupled into the coil induces a voltage or current in the coil.
19 . The pointing device according to claim 1 further comprising one or more buttons thereon.
20 . The pointing device according to claim 19 wherein at least one button is mounted on the side of the pointer and depressed by a radial force.
21 . The pointing device according to claim 19 wherein at least one button is mounted on the tip of the pointer and depressed by an axial force.
22 . A pointing device for use with an interactive surface, the pointing device comprising a receptacle for receiving a finger of a user, and a coil of a tuned circuit.
23 . The pointing device according to claim 22 wherein the coil is wound around, or wound adjacent to, the receptacle.
24 . The pointing device according to claim 1 wherein the coil resonates responsive to an induced voltage or current from the electromagnetic field produced by one or more drive coils of the interactive display.
25 . The pointing device according to claim 24 wherein the pointer is a passive device.
26 . The pointing device according to claim 1 wherein the coil resonates responsive to a drive signal.
27 . The pointing device according to claim 26 wherein the pointer is an active device.
28 . The pointing device according to claim 1 wherein the electromagnetic field produced by the coil induces a voltage or current in one or more sense coils of the interactive display.