IMAGE-ENHANCEMENT WITH POLYMER GRID TRIODE ARRAYS

An array of polymer grid triodes connected by a common grid functions as a ''plastic retina,'' providing local contrast gain control for ima ge enhancement. This simple device, made from layers of conducting pol ymers, functions as an active resistive network that performs center-s urround 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 uni t cell of each pixel.