MicroLED technology is regarded by many as a highly promising display technology, that could rival OLED in many applications in the future. We have been following microLEDs since 2018 via MicroLED-Info and are indeed excited by the progress and potential of this display technology.

MicroLED device efficiency by chip size (University of Central Florida, AUO)

Peak EQE of RGB micro-LED as a function of LED chip size (source: Crystals)

One of the most talked-about advantage of microLED displays compared to OLEDs is the power efficiency. MicroLEDs are based on in-organic LEDs, which are inherently much more efficient than organic LEDs.

MicroLED-Info posted a couple of articles that discuss the efficiency of microLEDs. The first article looks at the microLED chips themselves, and shows that the power efficiency (or EQE) of microLEDs is indeed quite high. The second article, which is more interesting, looks at the entire display - and the conclusion is quite surprising. Modern LTPS backplanes consume around 70% of the power that is used to drive a display, which means that microLED displays may perhaps be better than OLEDs but not by much. Of course the results are different for passive-matrix displays, microIC-driven microLEDs and microdisplays. Read the full article here.

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