Infrared touch screen positioning method based on optical fibers

The present invention relates to an optical fiber-based infrared touch screen positioning method, comprising the steps of: I. placing the infrared light source in fan rectangular screen two or more than two vertices, respectively; two, four sides of the rectangular screen are laid plastic fiber, when present on the touch screen when the opaque shield, the optical fiber can be given the exact coordinates of the shadow from the end position of the four sides of the touch screen on the opaque covering; Third, one end of the plastic optical fiber laid in the edge of the screen, with to sense infrared light, and the other end connected to the photosensor; Fourth, the photosensor receives a fiber optic data transmission to the touchscreen location module; five, the touch screen positioning module each light source and the light corresponding to the starting end position of the shadow, constructed It comprises a triangular or quadrangular covering, superimposed by a plurality of polygons, to give the position of the covering. The present invention reduces the cost of the touch screen, and the resolution is improved.