CONSUMER
FRONTIERS PHOTONICS
CONSUMER MICROLEDS
OEMs in race for brighter, more energy-efficient displays
The mass market beckons as manufacturers move to secure microLED capabilities
I
n January 2023, Bloomberg reported on Apple’s plans to build microLED displays into its future smartwatches as early as 2024, signalling the technology’s emergence in the commercial realm. The Apple Watch will likely be the first among Apple’s products to feature a micro LED display. From 2026 to 2030, this could expand to encompass AR headset displays and smartphone displays, according to market research firm Trendforce. With this technology, the Apple Watch
display could exceed two inches and achieve an even higher contrast level. Such improvements would satisfy the viewing needs of professionals and enthusiasts of various outdoor sporting activities. The move would also continue Apple’s
progression towards becoming vertically integrated and therefore not having to rely on components from outside suppliers such as Samsung and LG Display, which currently supply its OLED smartphone and watch displays. MicroLED technology offers the benefit of significantly improved energy efficiency – resulting in better battery life of devices – than OLEDs. They are brighter and contrast better than OLED displays. In addition, they have improved durability as the risk of screen burn-in – a common problem in OLED displays – is significantly less. However, a major barrier of the entrance
of microLEDs into commercial applications is the technology’s high price tag, a consequence of it being far less mature.
“MicroLED technology offers the benefit of significantly improved energy efficiency – resulting in better battery life of devices – than OLEDs”
Apple’s watches are set to integrate microLED displays Samsung has so far led the way with
microLED technology, but its current market offering highlights the cost barrier to mass adoption – its 120-inch microLED display, dubbed ‘The Wall’, costs more than $500,000. The company’s latest use of microLEDs, however, can be seen in TVs able to fit into the average home at a more attainable price point. At CES 2023, the company showed off microLED TVs as small as 50 inches, which it says could bring the technology into the mainstream. Nikkei Asia reported in May 2023 that
Apple intends to perform the critical ‘mass transfer’ step of the manufacturing process itself.
The mass transfer step involves moving
at least tens of thousands of micro-LED chips onto substrates. Apple will reportedly carry out this process at its R&D facilities in the northern Taiwanese city of Taoyuan. Apple has designed the driver-integrated circuits for the microLED screens, as well as production equipment to better optimise the mass transfer process. The company has spent more than $1bn on R&D and prototypes for microLEDs in the past 10 years, Nikkei Asia reports, and the move is set to gain Apple more control over the next-generation of display technologies for future products. However, it will still very much rely on partners and suppliers
g Photonics Frontiers 2023 41
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