Project aims for ultimate micro-displays

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A new way of making micro-displays for next-generation smartphones, smartwatches and VR headsets is being developed in an EPSRC-funded project led by Sheffield University.

In a new project led by Professor Tao Wang from the University’s Department of Electronic and Electrical Engineering, in collaboration with Harvard and MIT, researchers are using micro laser diodes - microLDs - to develop ultimate micro-display and visible light communication devices.

Micro-displays are currently used in smartphones, smartwatches, augmented reality and virtual reality devices. According to the University, visible light communication technology could offer much greater bandwidth and efficiency than WiFi or 5G and can be used where radio frequency emissions are controlled or do not work such as in aircraft, hospitals, underwater and hazardous environments.

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A key component of both these technologies are III-nitride visible light-emitting diodes (LEDs) but using laser diodes (LDs) instead has the potential to achieve devices with even higher resolution, speed and efficiency.

In the £1.9m project, the Sheffield-led team is developing an innovative new way of integrating microscale semiconductor light sources and transistors on a single chip.

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