Subpixel resolution by interpolation of crosstalk from adjacent pixels

A process for subpixel resolution of a light spot on a pixel in an array of pixels, with a first pixel having a first sheet resistance operably connected to a first readout device, interconnected with an interconnection having an interconnect resistance and signal changing properties to a second pixel having a second sheet resistance operably connected to a second readout device, wherein said first sheet resistance and said second sheet resistance have been optimized to provide a total resistance seen by a readout amplifier connected to said first and second readout devices to avoid noise amplification issues created by low impedance comprising:

• determining average background brightness of said array of pixels;
• illuminating said first pixel with said light spot to generate a primary signal current flow to said first readout device and a crosstalk signal current flow to said second readout device through said interconnection to said second pixel;
• subtracting said average background brightness from said primary signal current flow and said crosstalk signal current flow;
• determining signal metrics for said primary signal current flow measured at said first readout device and said crosstalk signal current flow measured at said second readout device;
• and
• calculating said subpixel resolution of said light spot by relating said signal metrics to a subpixel position on said array of pixels using a method selected from the group consisting of a look up table and position calculation equations.

A pixel array having a plurality of interconnected pixels comprising:

• a first pixel, having a first semiconductor layer with a second semiconductor layer laid on top of said first semiconductor layer, wherein said first pixel has a first sheet resistance and a first signal contact operably connected to a first read out device;
• a second pixel, having a third semiconductor layer with a fourth semiconductor layer laid on top of said third semiconductor layer, wherein said second pixel has a second sheet resistance and a second signal contact operably connected to a second read out device;
• wherein said first pixel and said second pixel are connected by an interconnection having signal changing properties;
• whereby illumination of said first pixel generates a primary signal current that travels to said first signal contact and is read by said first readout device and a crosstalk signal current that travels through said interconnection and said second signal contact to said second readout device;
• and
• whereby signal metrics of said primary signal current read by said first readout device and said crosstalk signal current read by said second readout device allows for subpixel sensing.