DUAL PEN SYSTEM
First Claim
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1. An interactive display system including an interactive surface comprising a drive grid and a sense grid, wherein the drive grid induces a current in a pointing device, and the pointing device in turn induces a current in the sense grid, the system comprising:
- a plurality of pointing devices, each pointing device having a unique nominal frequency; and
a drive grid signal generator for driving the drive grid for a period of time at each of the nominal frequencies of the pointing devices, wherein the system adapts the period of time for a given frequency to optimize said period of time for particular devices.
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Abstract
There is disclosed an interactive display system comprising an interactive surface for displaying an image and for receiving inputs from remote devices, the system being adapted to detect the presence of at least two remote devices proximate the interactive surface.
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Citations
20 Claims
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1. An interactive display system including an interactive surface comprising a drive grid and a sense grid, wherein the drive grid induces a current in a pointing device, and the pointing device in turn induces a current in the sense grid, the system comprising:
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a plurality of pointing devices, each pointing device having a unique nominal frequency; and a drive grid signal generator for driving the drive grid for a period of time at each of the nominal frequencies of the pointing devices, wherein the system adapts the period of time for a given frequency to optimize said period of time for particular devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, in an interactive display system including an interactive surface comprising a drive grid and a sense grid, in which the drive grid induces a current in a pointing device, and the pointing device in turn induces a current in the sense grid, the system comprising a plurality of pointing devices, each pointing device having a unique nominal frequency, of generating a drive grid signal, comprising:
- driving the drive grid for a period of time at each of the nominal frequencies of the pointing devices, and adapting the period of time for a given frequency to optimize the period of time of particular devices.
- View Dependent Claims (16, 17, 18, 19, 20)
Specification