IP Library Granted Patent US 8,068,093
Granted Patent B2
US 8,068,093 · App. 12/862,591 · Granted Nov 29, 2011

Duplicate objects

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Quick Facts
Patent No.
US 8,068,093
App. No.
12/862,591
Granted
Nov 29, 2011
Kind
B2
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.

Claims (4)

1. An interactive system comprising an interactive surface for displaying an image and adapted for determining the position, in use, of a plurality of pointing devices on the interactive surface, the system being adapted to manipulate an image displayed on the interactive surface in dependence on the plurality of pointing devices, wherein the image is duplicated responsive to detection of a first pointing device positioned on the displayed image, and detection of a second pointing device positioned on the displayed image, the duplication being determined in dependence on a detected dragging movement of either the first or second pointing devices and providing a duplicate image at a location to which the dragged pointing device is positioned.

2. The interactive system of claim 1 comprising a drive grid signal generator for driving a drive grid for period of time at each of a plurality of frequencies associated with each of the plurality of pointing devices, wherein the system adapts the period of time for a given frequency to optimize said period of time for particular devices.

3. A method in an interactive system comprising an interactive surface for displaying an image and for detecting a position of a plurality of pointing devices, in use, on the interactive surface, wherein the image is duplicated responsive to detection of a first pointing device positioned on the displayed image, and detection of a second pointing device positioned on the displayed image, the duplication being determined in dependence on a detected dragging movement of either the first or second pointing devices and providing a duplicate image at a location to which the dragged pointing device is positioned.

4. The method of claim 3 comprising driving a drive grid for a period of time at each of a plurality of frequencies associated with each of the plurality of pointing devices, and adapting the period of time for a given frequency to optimize said period of time for particular devices.

Assignments (4)
RELEASE OF SECURITY INTEREST Recorded Sep 21, 2017
From: WELLS FARGO CAPITAL FINANCE (UK) LIMITED
To: PROMETHEAN LIMITED
Reel/Frame 043936/0101 →
SECURITY AGREEMENT Recorded Jul 16, 2013
From: PROMETHEAN INC.; PROMETHEAN LIMITED
To: BURDALE FINANCIAL LIMITED, AS AGENT
Reel/Frame 030802/0345 →
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE: PROMETHEAN LTD. PREVIOUSLY RECORDED ON REEL 024895 FRAME 0028. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Dec 13, 2011
From: PEARCE, NIGEL; UNSWORTH, PETER
To: PROMETHEAN LTD.
Reel/Frame 027371/0916 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 26, 2010
From: PEARCE, NIGEL; UNSWORTH, PETER
To: PROMETHEAN HOUSE
Reel/Frame 024895/0028 →