Patent ID: 8269740
Filing Date: 2012-09-18
Classification: G06F

Abstract:
1. A multi-touch sensing method, comprising: (A) storing, in a memory, coordinate values of a first dead zone existing between a first pair of image sensors and coordinate values of a second dead zone existing between a second pair of image sensors; (B) calculating coordinate values of a touch point from images obtained by the first pair of image sensors; (C) calculating the coordinate values of the touch point from images obtained by the second pair of image sensors; (D) comparing the coordinate values of the touch point and the coordinate values of the dead zones to identify a location of the dead zone to which the touch point belongs; (E) selecting the coordinate values calculated in the C step if the coordinate values of the touch point belong to the first dead zone; and (F) selecting the coordinate values calculated in step B if the coordinate values of the touch point belong to the second dead zone.