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:
Dec. 20, 2016
Filed:
Jun. 15, 2012
Gareth John Mccaughan, Cambridgeshire, GB;
Paul Richard Routley, Cambridgeshire, GB;
John Andrew, Cambridgeshire, GB;
Euan Christopher Smith, Cambridgeshire, GB;
Peter William Tudor Mash, Cambridgeshire, GB;
Gareth John McCaughan, Cambridgeshire, GB;
Paul Richard Routley, Cambridgeshire, GB;
John Andrew, Cambridgeshire, GB;
Euan Christopher Smith, Cambridgeshire, GB;
Peter William Tudor Mash, Cambridgeshire, GB;
Promethean Limited, , GB;
Abstract
We describe a touch sensitive image display device including: an image projector to project a displayed image onto a surface; a touch sensor light source to project a plane of light above the displayed image; a camera to capture a touch sense image from light scattered from the plane of light by an approaching object; and a signal processor to process the touch sense image to identify a location of the object. The touch sensor light source is amplitude modulated, and signal processor is further configured to process a plurality of the touch sense images captured when the touch sensor light source is off to compensate for ambient light in a touch sense image captured when the touch sensor light source is on.