Nitrides Seminar - Matthew Wong, Graduate Student Researcher

High Performance Micro-Light-Emitting Diodes for Display Applications

Due to the rapid developments of wearable and portable devices in recent years, displays with better efficiency and higher resolution are greatly desired. In addition to the standard display parameters, such as resolution and power consumption, other emerging properties including mechanical flexibility and optical transparency are important for next-generation display applications. However, because of the inherent limitations in current display technologies, namely liquid-crystal displays (LCDs) and organic-light-emitting diode (OLED) displays, new display technologies must be developed for futuristic display applications. Inorganic micro-light-emitting diodes (µLEDs) are considered as one of the promising candidates for next-generation display applications, since monolithic µLED displays have been demonstrated outstanding performance than LCDs and OLED displays.

In this presentation, the operating principles of LCDs and OLED displays will be first reviewed. After that, the challenges of µLED displays in terms of size effect (size-dependent efficiency), color gamut (long-wavelength emission), and mass transfer will be introduced. Since the issues in µLED displays are disparate from the current and other potential display technologies, novel approaches that address the µLED problems will also be discussed.