Iterative coordinate data approximation system for photoemissive pixel pattern displays

Abstract From the Canadian patent

Abstract of the Disclosure Almost any Photoemissive Pixel Pattern Display Tube (PPDT) System, such as one for a PMDT matrix display system is capable of supplying an indication of coordinate data for input to data processing systems and the like with this electronic photoresponsive data approximation system. A photoresponsive probe with relatively large optical aperture stop is coupled to suitable electric current amplifying circuitry which in turn is coupled to data resolving circuitry for gating counting circuitry coupled to the display matrixing circuitry for determining the coordinates of the location of the probe in terms of the geometrical dimensions of the display. The probe is …