FILTER OF PHOTOELECTRIC TOUCH PANNELS

摘要

The filter is slanted at about 45 degrees and its surface is made into slanted surface segments. LED's are located at the end portion of an array and diverged to the filter portion fitter which perpendicularly crosses the filter portion disposed in front of the LED's. The surface segments cause the beams emitted by the LED's to be reflected outwardly and thus enable only the beams advancing straight to be porperly received by the opposing phototransistor. Only the beam of light advancing straight is received by the corresp. photosensitive element, avoiding the entrance of a reflected beam thus, the beam shielding in the matrix of infrared beams is correctly imputed to a computer.