News: LEDs
15 May 2024
Mojo Vision demonstrating micro-LED advances at Display Week
At SID Display Week 2024 in San Jose (14–16 May), Mojo Vision Inc of Saratoga, CA, USA — which is developing and commercializing micro-LED display technology for consumer, enterprise and government applications — is announcing advances in display technology, including demonstrating a monolithic red, green and blue (RGB) panel with 4µm pixel pitch, representing a density of 6350 pixels per inch (ppi).
The firm is also demonstrating a technology enhancement that substantially improves brightness and reduces power consumption by up to 5x compared with a traditional LED structure.
Mojo says that the demonstrations represent another step in its micro-LED development progress as it drives the technology towards commercialization.
Display technology for AI-powered smartglasses
Mojo developed a monolithic RGB panel with 4µm pixels and 1.3µm sub-pixels using its proprietary quantum dot (QD) and integration processes. Designed to enable slim smartglass form factors, the compact display addresses existing consumer pain points such as high ambient viewing, size, weight and battery life. With 6350ppi, this single-panel micro-LED display is claimed to set a new standard, as augmented-reality (AR) glasses currently on the market offer ~4000ppi or less.
“As the XR industry continues to push for smaller, less obtrusive form factors, we need to get to smartglasses that look and feel just like the eyeglasses that most people wear today,” says CEO Nikhil Balram. “But functionality and features like brightness, resolution, field of view and integration of AI are also critical. Today’s smartglasses are starting to include AI in the form of audio input and output, but visual interaction with AI will be an important enhancement to the user experience, for true AI glasses,” he adds.
“Over half of the brain’s cortex is devoted to visual processing, and the possibility of incorporating rich AI with visual feedback into future smartglasses will create captivating new products,” continues Balram. “The 4µm pixel size in Mojo’s monolithic RGB panels is critical to enabling a lightweight, compact, energy-efficient and bright display, which will be key to making glasses fully ‘smart’ without sacrificing visual-appeal and comfort.”
Brightness enhancement and power reduction using Micro-Lens-Array
Mojo is also demonstrating the substantial performance enhancements made possible through its use of ultra-small LEDs. LEDs naturally disperse light in many directions, leading to wasted light. Less than 7% of an LED’s output enters the AR optics and reaches the human eye for visual processing. By using an MLA with lenses that can be substantially larger than tiny LEDs, Mojo’s displays can deliver up to five times as much light to the human eye, resulting in a robust increase in brightness and energy efficiency, it is claimed.
Mojo is demonstrating this enhancement by placing an MLA with 3µm pitch on top of blue LED and red QD arrays with 1.3µm sub-pixels, and showing side-by-side comparisons of the brightness with and without the MLA. This is reckoned to be a significant milestone in creating a commercially scalable, high-performance and reliable full-color micro-LED display.
“Mojo is advancing human interaction with technology by creating the world’s smallest and densest micro-LED displays,” comments Society for Information Display’s president Dr Achin Bhowmik, who is a member of Mojo Vision’s board of directors. “As smartglasses with compelling AI features gain popularity, the market is primed for the next generation of displays,” he adds. “Mojo’s advancements will provide significant benefits to manufacturers as they incorporate micro-LED into the next generation of product.”
Mojo Vision integrates RGB micro-LED sub-pixels into single panel
