The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2016
Filed:
Jun. 15, 2012
Gareth John Mccaughan, Cambridgeshire, GB;
Paul Richard Routley, Cambridgeshire, GB;
John Andrew, Cambridgeshire, GB;
Euan Christopher Smith, Cambridgeshire, GB;
Adrian J. Cable, Cambridgeshire, GB;
Gareth John McCaughan, Cambridgeshire, GB;
Paul Richard Routley, Cambridgeshire, GB;
John Andrew, Cambridgeshire, GB;
Euan Christopher Smith, Cambridgeshire, GB;
Adrian J. Cable, Cambridgeshire, GB;
Promethean Limited, , GB;
Abstract
A touch sensitive device, the device comprising: a touch sensor light source to project a plane of light above a surface; a camera directed to capture a touch sense image from a region including at least a portion of said plane of light, said touch sense image comprising light scattered from said plane of light by a plurality of said objects simultaneously approaching or touching said surface; a signal processor coupled to said camera, to process a said touch sense image from said camera to identify a lateral location of each of said objects; and an output object position output, to provide output object positions for said plurality of objects; and wherein said signal processor is further configured to: input a succession of said touch sense images; process each said touch sense image to identify a plurality of candidate object touch positions; and filter said candidate object touch positions from said successive touch sense images to link said candidate object touch positions to previously identified output object positions for said plurality of objects; and update said previously identified output object positions using said linked candidate object touch positions.