Lumiode explains its truly-monolithic microLED microdisplay technology
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US-based Lumiode has been developing MicroLED Microdisplays for many years, but the company has been very quiet and did not disclose much about its technology. We have recently met with Vikas Dhurka (VP Marketing) and Eddy Hsu (director of Display Systems) who explained and demonstrated the company's technology. Lumiode has developed a unique technology for the fabrication of TFT backplanes directly on top of Micro-LED arrays. This enables an entirely monolithic process (with no wafer bonding) to create highly bright and efficient microdisplays. Lumiode uses standard semiconductor processes to deposit amorphous silicon on top of the LED epiwafer and then laser crystallize it to LTPS. The core of Lumiode's tech is the ability to deposit and crystallize the silicon without harming the LED devices. Lumiode's latest prototype (which was demonstrated to us) is a 0.13" monochrome (green) microdisplay with 16,000 pixels (1,400 PPI). This is an extremely bright little display - that can reach up to 1,000,000 nits. One of the advantages of Lumiode's technology is that the LEDs are not damaged at all and maintain their high performance at the end of the process - and the company says it could reach a brightness of over 10 million nits. Lumiode's next step is to achieve full-color displays, which will be done via blue LED devices with a color conversion layer. The company also aims to start offering commercial high-brightness monochrome displays in the near future.
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