MICLEDI announces Red GaN MicroLED breakthrough

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MICLEDI Microdisplays, a developer of microLED displays for augmented reality (AR) glasses, has demonstrated 630nm wavelength red GaN with full-width-half-max (FWHM) in the range of 50nm.

This high-performing red microLED is seen as helping to position MICLEDI as a market leader in highly optimised monochrome microLED panels for integration into full-colour microLED display modules. Historically, red microLEDs have suffered a reputation as a poor performing part – but this breakthrough by MICLEDI helps to address that.

According to MICLEDI, its approach to microLED full-colour displays is intended to achieve the highest performance standards in AR glasses. At present, AR glasses for indoor, or semi-darkened, light settings can be less efficient, less bright, and with lower overall performance when compared to outdoor sunlight settings. Best-in-class AR glasses with transparent lenses, for use all the way from low indoor light to bright outdoor sunlight, are seen as critical in achieving high-volume consumer adoption of AR glasses.

By optimising the chemistry and physics of each individual colour, MICLEDI said that it is able to provide the highest brightness solution currently available.

Red GaN is compatible with MICLEDI’s proprietary CMOS-fab technology and follows the identical process recipe of the company’s blue and green arrays for consistency. It also accommodates pixel-level micro lenses for high-efficiency optics integration and has been tailored for industry-standard 300mm commercial foundries for high-volume mass production.

According to the company’s CEO, Sean Lord, “AR headgear in the market today ranges from monochrome monocles for limited information-only displays to monochrome headsets and heads-up displays to full-colour glasses for industrial, enterprise and military applications. Prices range from $1000 to over $5000 per headset, which is too high for the average consumer. With the addition of red GaN to our tool kit, MICLEDI is positioned to bring the cost and volume advantages of its 300mm manufacturing flow to open the door to future generations of AR glasses that consumers can afford and enjoy.

“Red GaN is but one option,” added Lord. “Alternative approaches vary from AlInGaP to Quantum Dot, and other techniques. MICLEDI is committed to pushing the cost, reliability, and performance envelope of each of these alternatives to provide the best in full colour microLED display modules across a broad range of performance parameters for transparent lens AR glasses.”

MICLEDI introduced its blue GaN and green GaN LED display test chips earlier this year. The new red samples are projected to be available to customers before the end of the year.