Simultaneous Illumination‐Imaging

Abstract Micro multiple quantum well (MQW) III‐nitride diodes usually function as micro light‐emitting diodes, which are considered the next generation of display technology. In addition to both illumination and display, MQW III‐nitride diodes in theory have the capability to both detect and modulate light. Here, proof that the III‐nitride diode can simultaneously emit and detect light is experimentally confirmed by a wireless light communication system using two identical devices. The 20 × 20 MQW III‐nitride diodes are monolithically integrated into a single chip and a real‐time imaging system of transmitted images is established, which in practice can perform display, illumination, imaging, and simultaneous illumination‐imaging operations. These functions can be software controlled and switched freely. This work may lead to a multifunctional display that merges millions of III‐nitride diodes together to perform these functions at the same time.