A Single OLED With Hybrid Synaptic Plasticity Enabling In Situ Neuromorphic Processing and Visualization.

Abstract

As the core interface for human-computer interaction, multitask intelligent display systems face increasingly stringent demands regarding precision and functional integration. However, in existing architectures, light-emitting units only act as passive display terminals. Endowing light-emitting devices with computing capabilities and realizing computing-as-display, thereby reducing transmission overhead and improving display precision, is the key to promoting the further development of this field. Inspired by the human brain, we innovatively report an organic light-emitting diode featuring both long- and short-term synaptic plasticity and synaptic weight-driven electroluminescence. By engineering charge-trapping structures and heterojunction potential wells within a single OLED device, we establish dual-tier synaptic response output channels for information processing, operating independently on second- and millisecond-level timescales under electrical and optical signal modulation, respectively. Following information processing, the processed results are visualized via a globally driven electroluminescence mechanism enabled by synaptic weight modulation. We introduce the Multi-Task Display Fidelity index as a universal metric to quantify the cooperative accuracy between processing and display, achieving a value of 90.86%. Furthermore, the processing-display coupling index of the device surpasses the corresponding index of mainstream CMOS architectures by 67.8%. This work demonstrates the immense potential of hybrid synaptic plasticity OLEDs for multitask intelligent display.