Image Enhancement with Polymer Grid Triode Arrays

Science  08 Dec 1995:
Vol. 270, Issue 5242, pp. 1642-1644
DOI: 10.1126/science.270.5242.1642


An array of polymer grid triodes connected by a common grid functions as a “plastic retina,” providing local contrast gain control for image enhancement. This simple device, made from layers of conducting polymers, functions as an active resistive network that performs center-surround filtering. The polymer grid triode array with common grid is a continuous analog of the discrete approach of Mead, with a variety of fabrication advantages and significant savings in area within the unit cell of each pixel.