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:
Aug. 14, 2007
Filed:
Apr. 08, 2003
Gerald D. Morrison, Calgary, CA;
Gerald D. Morrison, Calgary, CA;
Smart Technologies, Inc., , CA;
Abstract
A touch system includes a touch surface on which an image is, displayed and at least one camera acquiring images of the touch surface. A pointer contact data generator generates pointer position data in response to pointer contact with the touch surface. The pointer position data represents the location of the pointer on the touch surface where pointer contact is made. A processor communicates with the at least one camera and the pointer contact data generator. The processor uses known points in the displayed images to calibrate automatically co-ordinate systems of the touch system, and uses calibrated pointer position data to update image data that is used to present the displayed image on the touch surface. In one embodiment, the touch system includes an active touch sensitive screen that comprises both the touch surface and the pointer contact data generator. In another embodiment, image data generated by a pair of cameras having overlapping fields of view is used by the pointer contact data generator to generate the pointer position data when a pointer is acquired in images captured by the pair of cameras.