Parallax induced pointing error avoidance method and means...

Details Parallax induced pointing error avoidance method and means... Parallax induced pointing error avoidance method and means...

G - Physics

06

F

340/135.1, 354/2

G06F 3/033 (2006.01) G06K 11/06 (2006.01)

Patent

CA 1293037

BO986001 PARALLAX INDUCED POINTING ERROR AVOIDANCE METHOD AND MEANS FOR SYSTEMS USING TOUCH SCREEN OVERLAYS ABSTRACT OF THE DISCLOSURE In a system using a touch panel type of overlay on a cathode ray tube screen wherein multiple areas for user selection are presented on the tube screen, erroneous touch selection of displayed areas on the tube because of parallax-induced offset is avoided by assigning a guard band around each display area. The width of the band is designed to correlate to the amount of parallax error associated with the combined tube and overlay touch screen environment.

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