Feature: Displays
to eliminate this problem, it can be eased. Te best way to increase pixel lifetime is to focus on material development and device architecture improvements. Blue OLED is still in the research stages and showing great promise, but is currently in a commercial bottleneck. To bypass that, manufacturers need to start using OLED screens in dynamic displays such as mobile phones and television sets, where the changing image equalises the degradation of each pixel so that burn-in slows down. Tis is different from laptops or monitors, since they usually operate on a static image, which causes faster burn-in, the reason why there are so few OLED laptops and monitors.
The rise of the VR headset VR headsets have been in the mainstream gaming market for ten years and have gone through much development as OEMs compete for market share. From removing headset cables to sensor integration, VR headsets first caught public interest with Oculus Riſt prior to the brand’s acquisition by Meta in 2014.
New applications like Metaverse will
also further increase interest in VR headsets, which in turn will lead to further development of both hardware and soſtware. A good-quality VR headset screen
needs high resolution and contrast, both of which can be achieved by LCDs. However, the OLED gives much better contrast because of its organic emitters. Furthermore, gamers will want a headset that is lightweight, to avoid neck strain from prolonged use, which is yet another area where OLEDs’ lighter structure is advantageous. Since OLED also uses less energy, it decreases the need for higher battery capacities, which promotes the development of lighter headsets. Previous VR headset screens used
LCDs since they are cheaper, but this is now changing as the price of manufacturing high-resolution OLED screens decreases. This could mean that we will see OLED screens dominate the VR headset market.
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The future of OLEDs and LCDs Research into the potential of OLEDs continues apace, and NextGen Nano is among the companies leading this research. Its New Fusion Technology promises low-voltage blue OLEDs that only require half the operating voltage of conventional OLEDs, giving them a much longer lifetime. Last August, NextGen Nano acquired
Nanoled’s intellectual property platform, paving the way for this technology in the VR market. Nanoled pursues a better blue OLED by designing more efficient blue emitters, which could potentially alleviate the degradation and burn-in problems faced by OLED screens. Te company’s researchers are also trying to integrate the plasmonic effect in OLEDs, which not only enhances the exciton radiative rate but also decreases quenching, to improve device lifetime. Tis method should be universally applicable to all screens and could see the lifetime of a device extended two or three times. As OLED technology enters the gaming
market, further development will be needed to break boundaries – it will be exciting to see to what effect.
www.electronicsworld.co.uk March 2022 31
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