Patent ID: 7626577
Filing Date: 2009-12-01
Classification: G03B,G06F,H04L

Abstract:
1. Calibration structure for correcting non-orthogonal misalignment of a computer-generated image that is projected onto a large screen touch-detecting display, so that a computer-generated cursor appears substantially where the large screen touch-detecting display is touched, comprising: structure to generate at least four calibration marks, respectively, substantially proximate four corners of a projected image to be displayed on the large screen touch-detecting display; structure, responsive to a touch on the large screen touch-detecting display where each of the four calibration marks is displayed, to identify horizontal and vertical coordinates of each touched location; structure which calibrates the projected image to the large screen touch-detecting display after the four calibration marks have been touched; and structure, responsive to another touch on the large screen touch-detecting display after calibration, which calculates corrected horizontal and vertical coordinates for said another touch so that a cursor is displayed on the large screen touch-detecting display substantially at the location of the another touch on the large screen touch-detecting display.