TECHNOLOGY I MICROLEDs
MicroLEDs eye structured illumination Light engines formed from arrays of GaN microLEDs with a varying pitch, size and wavelength target numerous applications BY JAN GÜLINK AND HEIKO BRÜNING FROM QUBEDOT AND UNIVERSITY OF TECHNOLOGY BRAUNSCHWEIG
PRODUCTION of GaN-based LEDs has reached phenomenal volumes, thanks to the widespread deployment of this device in general illumination. To date, this growing global market has drawn on largearea LEDs, with typical dimensions of 1 mm² and optical output powers in the Watt range. Progress of the GaN LED has taken a markedly different path from that of silicon microelectronics. While the cornerstone of that industry is a continual shrinking of device dimensions towards the atomic scale, for LEDs for general lighting, there are no efforts to even move dimensions towards the micron range. Today’s LEDs used in general lighting serve in myriad applications. Examples of their numerous uses include
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