Micro-LED Technology for Display Applications

Light-emitting diodes (LEDs), which emit efficient and bright light ranging from infrared to ultraviolet, have been adopted in various fields to improve quality of life. In particular, micro-LEDs, which are III–V inorganic-based micro-miniaturized light sources, which can form clear and vivid displays for smart portable devices and can be used with artificial intelligence, are drawing great attention. The micro-LEDs can be used in applications where it is difficult to use existing inorganic LEDs, such as in medicine, clothing, and miniature electronics. Research on developing micro-LEDs is underway around the world as the demand for micro-miniaturized light sources increases, especially for display applications. However, problems are also emerging that hinder the mass production of micro-LED displays. Herein, we introduce the current research trends and issues involved in overcoming various problems associated with using micro-LEDs as full-color light sources in display applications. We also briefly review newly presented research and development strategies and technologies for micro-LEDs by research institutes and companies, including their patents and products.