Patent ID: 8654103
Filing Date: 2014-02-18
Classification: G06F

Abstract:
1. An interactive display device comprising: an image layer configured to provide a user with a perceivable visible image according to an electronic signal; a touching surface covering the image layer or formed by the image layer; an image capture unit configured to obtain, in a particular invisible frequency range and at a given image set capture rate, successive sets of captured images representative objects in the proximity of the image layer; a processor configured to detect from the captured images contact areas where a pointing object contacts the touching surface and thus causes correspondingly a set of marks in the captured images; an illumination unit configured to illuminate in the invisible frequency range the contact areas with blinking illumination at a strobe rate that is less or equal to the image set capture rate; the processor being further configured to detect the contact areas by identifying matching sets of marks from captured images of an image set based on: