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. 02, 2014
Filed:
Sep. 01, 2010
Grant Mcgibney, Calgary, CA;
Gerald Morrison, Calgary, CA;
Charles Ung, Calgary, CA;
Trevor Akitt, Calgary, CA;
Ed Tse, Calgary, CA;
Erik Benner, Calgary, CA;
Jamie Duncalf, Calgary, CA;
Grant McGibney, Calgary, CA;
Gerald Morrison, Calgary, CA;
Charles Ung, Calgary, CA;
Trevor Akitt, Calgary, CA;
Ed Tse, Calgary, CA;
Erik Benner, Calgary, CA;
Jamie Duncalf, Calgary, CA;
SMART Technologies ULC, , CA;
Abstract
An input panel for an interactive input system comprises an optical waveguide; a first radiation source directing radiation into said optical waveguide, said radiation undergoing total internal reflection within said optical waveguide; a diffusion layer adjacent to and on one side of the optical waveguide, totally internally reflected light being frustrated and escaping the optical waveguide in response to pointer contacts on the diffusion layer; a second radiation source directing radiation towards another side of the optical waveguide that is opposite the one side; and at least one imaging device having a field of view looking at the optical waveguide and capturing image frames, wherein said first and second radiation sources are turned on and off in succession and wherein said first radiation source is turned off when said second radiation source is on and wherein said first radiation source is turned on when said second radiation source is off.