Heeger AJ, Heeger DJ, Langen J, and Yang T, Image Enhancement using Polymer Grid Triode Arrays, Science, 270:1642-1644, 1995.
Abstract: An array of polymer grid triodes with common grid functions as a "plastic retina" which provides local contrast gain control for image enhancement. The polymer grid triode array can be implemented on the focal plane to process the analog data directly from a photodetector array. Alternatively, the array of polymer grid triodes can be utilized after analog to digital conversion and integrated directly into a display.